USAP-DC

{"dp_type": "Dataset"}

[{"awards": "2324092 MacKie, Emma", "bounds_geometry": ["POLYGON((95 -65,96 -65,97 -65,98 -65,99 -65,100 -65,101 -65,102 -65,103 -65,104 -65,105 -65,105 -65.7,105 -66.4,105 -67.1,105 -67.8,105 -68.5,105 -69.2,105 -69.9,105 -70.6,105 -71.3,105 -72,104 -72,103 -72,102 -72,101 -72,100 -72,99 -72,98 -72,97 -72,96 -72,95 -72,95 -71.3,95 -70.6,95 -69.9,95 -69.2,95 -68.5,95 -67.8,95 -67.1,95 -66.4,95 -65.7,95 -65))"], "date_created": "Mon, 21 Apr 2025 00:00:00 GMT", "description": "This dataset is a result of a study which uses Monte Carlo Markov Chain and geostatistics to infer subglacial topography from sparse bed elevation measurements. The dataset consists of 40 equally probable realizations of subglacial topography in the Denman region. Each of the realizations is constrained by conservation of ice mass (mass conservation), complies with bed elevation measurements from bedmap3 dataset, and has a realistic topographic roughness. The topography has 1 kilometer times 1 kilometer resolution on a regular grid in polar stereographic projection (EPSG 3412).", "east": 105.0, "geometry": ["POINT(100 -68.5)"], "keywords": "Antarctica; Cryosphere; Denman Glacier; East Antarctica; Geostatistics; Ice Thickness; MCMC; Model Data; Monte Carlo Markov Chain; Subglacial Topography", "locations": "Antarctica; East Antarctica; Denman Glacier", "north": -65.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Shao, Niya; MacKie, Emma; Michael, Field; McCormack, Felicity", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -72.0, "title": "Ensemble of subglacial topography beneath Denman Glacier generated by geostatistical Monte Carlo Markov Chain under mass conservation principle", "uid": "601927", "west": 95.0}, {"awards": null, "bounds_geometry": ["POLYGON((-180 -40,-144 -40,-108 -40,-72 -40,-36 -40,0 -40,36 -40,72 -40,108 -40,144 -40,180 -40,180 -45,180 -50,180 -55,180 -60,180 -65,180 -70,180 -75,180 -80,180 -85,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -85,-180 -80,-180 -75,-180 -70,-180 -65,-180 -60,-180 -55,-180 -50,-180 -45,-180 -40))"], "date_created": "Fri, 11 Apr 2025 00:00:00 GMT", "description": "This software package models the paleobathymetry of the circum-Antarctic oceans back to the Late Cretaceous. It is based on a revised tectonic model of the circum-Antarctic region, and incorporates features such as spatially variable subsidence rates, refined rotation poles and a detailed treatment of selected areas. \r\n\u003cbr/\u003e\nThe software output consists of color-coded maps at user-specified Cenozoic ages and the associated gridded paleobathymetry for all oceans lying south of 30\u00b0S.\r\n\n\u003cbr/\u003eThis dataset was retrieved from NOAA NCEI (https://www.ncei.noaa.gov/products/circum-antarctic-paleobathymetry). \n\u003cbr/\u003eCheck \u003ca href=\"https://www.ncei.noaa.gov/\"\u003ehttps://www.ncei.noaa.gov/\u003c/a\u003e\r\n\u003cbr/\u003e", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Bathymetry; Cryosphere; Elevation; Model; Oceans; Paleobathymetry; Southern Ocean", "locations": "Antarctica; Southern Ocean", "north": -40.0, "nsf_funding_programs": null, "persons": "Hayes, Dennis; Zhang, C.; Weissel, Rose Anne", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -90.0, "title": "Circum-Antarctic Paleobathymetry to 30\u00b0 South: Present to 75my", "uid": "601926", "west": -180.0}, {"awards": "1738992 Pettit, Erin C; 1929991 Pettit, Erin C", "bounds_geometry": ["POLYGON((-114 -74,-113 -74,-112 -74,-111 -74,-110 -74,-109 -74,-108 -74,-107 -74,-106 -74,-105 -74,-104 -74,-104 -74.2,-104 -74.4,-104 -74.6,-104 -74.8,-104 -75,-104 -75.2,-104 -75.4,-104 -75.6,-104 -75.8,-104 -76,-105 -76,-106 -76,-107 -76,-108 -76,-109 -76,-110 -76,-111 -76,-112 -76,-113 -76,-114 -76,-114 -75.8,-114 -75.6,-114 -75.4,-114 -75.2,-114 -75,-114 -74.8,-114 -74.6,-114 -74.4,-114 -74.2,-114 -74))"], "date_created": "Wed, 09 Apr 2025 00:00:00 GMT", "description": "GPS data spanning two years (with data gaps) at the Cavity and Channel sites AMIGOS (Automated Meteorology-Ice-Geophysics Observing System) and a temporary nearby station (BOB) on the Thwaites Eastern Ice Shelf, Antarctica. Data are reported as processed positions (latitude/longitude/height above WGS84 ellipsoid) and derived along flow velocities.\r\n\u003cbr/\u003e", "east": -104.0, "geometry": ["POINT(-109 -75)"], "keywords": "Amundsen Sea; Antarctica; Cryosphere; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GNSS; Ice Shelf; Ice Velocity; Thwaites Glacier", "locations": "Amundsen Sea; Thwaites Glacier; Antarctica; Thwaites Glacier", "north": -74.0, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Truffer, Martin; Scambos, Ted; Wild, Christian; Pettit, Erin; Alley, Karen", "project_titles": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment", "projects": [{"proj_uid": "p0010162", "repository": "USAP-DC", "title": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -76.0, "title": "Thwaites Eastern Ice Shelf GPS displacements", "uid": "601925", "west": -114.0}, {"awards": "1744958 Wei, Yong; 1744856 Bromirski, Peter", "bounds_geometry": ["POLYGON((-155 -62,-146.3 -62,-137.6 -62,-128.9 -62,-120.2 -62,-111.5 -62,-102.80000000000001 -62,-94.10000000000001 -62,-85.4 -62,-76.7 -62,-68 -62,-68 -64.5,-68 -67,-68 -69.5,-68 -72,-68 -74.5,-68 -77,-68 -79.5,-68 -82,-68 -84.5,-68 -87,-76.7 -87,-85.4 -87,-94.1 -87,-102.8 -87,-111.5 -87,-120.19999999999999 -87,-128.89999999999998 -87,-137.6 -87,-146.3 -87,-155 -87,-155 -84.5,-155 -82,-155 -79.5,-155 -77,-155 -74.5,-155 -72,-155 -69.5,-155 -67,-155 -64.5,-155 -62))"], "date_created": "Fri, 04 Apr 2025 00:00:00 GMT", "description": "This dataset includes the bathymetric model grids used to simulate the impact of Pacific-wide and the West Antarctica ice shelf from tsunamis generated by Circum-Pacific-Rim subduction. zone earthquakes.", "east": -68.0, "geometry": ["POINT(-111.5 -74.5)"], "keywords": "Antarctica; Cryosphere; Model Simulation; Pacific Ocean; Subduction Zone Earthquakes; Tsunami; Tsunami impact; West Antarctica Ice Shelf", "locations": "Antarctica; West Antarctica Ice Shelf; Antarctica; Pacific Ocean", "north": -62.0, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Wei, Yong", "project_titles": "Collaborative Research: Do Ocean Wave Impacts Pose a Hazard to the Stability of West Antarctic Ice Shelves?", "projects": [{"proj_uid": "p0010320", "repository": "USAP-DC", "title": "Collaborative Research: Do Ocean Wave Impacts Pose a Hazard to the Stability of West Antarctic Ice Shelves?"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -87.0, "title": "Datasets of bathymetric model grids for model simulations of tsunami Propagation from Circum-Pacific Subduction Zone to West Antarctic Ice Shelves", "uid": "601924", "west": -155.0}, {"awards": "1744958 Wei, Yong; 1744856 Bromirski, Peter", "bounds_geometry": ["POLYGON((-180 62,-168.8 62,-157.6 62,-146.4 62,-135.2 62,-124 62,-112.80000000000001 62,-101.60000000000001 62,-90.4 62,-79.2 62,-68 62,-68 47.1,-68 32.2,-68 17.299999999999997,-68 2.399999999999999,-68 -12.5,-68 -27.400000000000006,-68 -42.3,-68 -57.2,-68 -72.1,-68 -87,-79.2 -87,-90.4 -87,-101.6 -87,-112.8 -87,-124 -87,-135.2 -87,-146.39999999999998 -87,-157.6 -87,-168.8 -87,180 -87,174 -87,168 -87,162 -87,156 -87,150 -87,144 -87,138 -87,132 -87,126 -87,120 -87,120 -72.1,120 -57.2,120 -42.3,120 -27.4,120 -12.5,120 2.400000000000006,120 17.299999999999997,120 32.2,120 47.099999999999994,120 62,126 62,132 62,138 62,144 62,150 62,156 62,162 62,168 62,174 62,-180 62))"], "date_created": "Fri, 04 Apr 2025 00:00:00 GMT", "description": "The dataset includes model simulation results of the Pacific-wide propagation of tsunamis, specifically the time sequence of the water surface elevation of the tsunami, generated by circum-Pacific-Rim subduction zone earthquakes. The simulation scenarios include two historical events, the September 16, 2025 tsunami generated by the Mw 8.3 Illapel, Chile earthquake and the March 11, 2011 tsunami generated by the Mw 9.1 Honshu, Japan earthquake. Also included are six scenarios generated by hypothetical Mw 8.6 earthquakes in the Alaska, Central America, South America, Kermadec, Kuil, and New Zealand-Tonga subduction zones, respectively. These simulation results have been used as boundary conditions to investigate tsunami impact in the West Antarctica ice shelves.", "east": -68.0, "geometry": ["POINT(-154 -12.5)"], "keywords": "Antarctica; Cryosphere; Model Output; Model Simulation; Pacific Ocean; Subduction Zone Earthquakes; Tsunami; Tsunami impact; West Antarctic Ice Sheet", "locations": "West Antarctic Ice Sheet; Antarctica; Pacific Ocean; Pacific Ocean", "north": 62.0, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Wei, Yong", "project_titles": "Collaborative Research: Do Ocean Wave Impacts Pose a Hazard to the Stability of West Antarctic Ice Shelves?", "projects": [{"proj_uid": "p0010320", "repository": "USAP-DC", "title": "Collaborative Research: Do Ocean Wave Impacts Pose a Hazard to the Stability of West Antarctic Ice Shelves?"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -87.0, "title": "Model simulation data of tsunami propagation in the Pacific Ocean", "uid": "601921", "west": 120.0}, {"awards": "1744958 Wei, Yong; 1744856 Bromirski, Peter", "bounds_geometry": ["POLYGON((-155 -65,-148.5 -65,-142 -65,-135.5 -65,-129 -65,-122.5 -65,-116 -65,-109.5 -65,-103 -65,-96.5 -65,-90 -65,-90 -67.1,-90 -69.2,-90 -71.3,-90 -73.4,-90 -75.5,-90 -77.6,-90 -79.7,-90 -81.8,-90 -83.9,-90 -86,-96.5 -86,-103 -86,-109.5 -86,-116 -86,-122.5 -86,-129 -86,-135.5 -86,-142 -86,-148.5 -86,-155 -86,-155 -83.9,-155 -81.8,-155 -79.7,-155 -77.6,-155 -75.5,-155 -73.4,-155 -71.3,-155 -69.2,-155 -67.1,-155 -65))"], "date_created": "Fri, 04 Apr 2025 00:00:00 GMT", "description": "The dataset includes model simulation results of the tsunami impact on the Thwaites Ice Shelf, specifically the time sequence of the water surface elevation of the tsunami, generated by circum-Pacific-Rim subduction zone earthquakes. The model simulations utilized the boundary conditions provided by the Pacific-wide simulations. The simulation scenarios include two historical events, the September 16, 2025 tsunami generated by the Mw 8.3 Illapel, Chile earthquake and the March 11, 2011 tsunami generated by the Mw 9.1 Honshu, Japan earthquake. Also included are four scenarios generated by hypothetical Mw 8.6 earthquakes in the Alaska, Central America, South America, and Kermadec subduction zones, respectively. ", "east": -90.0, "geometry": ["POINT(-122.5 -75.5)"], "keywords": "Antarctica; Cryosphere; Model Simulation; Ross Sea Ice Shelf; Thwaites Region; Tsunami; Tsunami impact; West Antarctica Ice Shelf", "locations": "Antarctica; West Antarctica Ice Shelf; Ross Sea Ice Shelf; Thwaites Region", "north": -65.0, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Wei, Yong", "project_titles": "Collaborative Research: Do Ocean Wave Impacts Pose a Hazard to the Stability of West Antarctic Ice Shelves?", "projects": [{"proj_uid": "p0010320", "repository": "USAP-DC", "title": "Collaborative Research: Do Ocean Wave Impacts Pose a Hazard to the Stability of West Antarctic Ice Shelves?"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -86.0, "title": "Datasets for Model Simulations of Tsunami Propagation from Circum-Pacific Subduction Zone to West Antarctic Ice Shelves (Thwaites)", "uid": "601923", "west": -155.0}, {"awards": "1744958 Wei, Yong", "bounds_geometry": ["POLYGON((-180 -69,-176.25 -69,-172.5 -69,-168.75 -69,-165 -69,-161.25 -69,-157.5 -69,-153.75 -69,-150 -69,-146.25 -69,-142.5 -69,-142.5 -70.7,-142.5 -72.4,-142.5 -74.1,-142.5 -75.8,-142.5 -77.5,-142.5 -79.2,-142.5 -80.9,-142.5 -82.6,-142.5 -84.3,-142.5 -86,-146.25 -86,-150 -86,-153.75 -86,-157.5 -86,-161.25 -86,-165 -86,-168.75 -86,-172.5 -86,-176.25 -86,180 -86,177.5 -86,175 -86,172.5 -86,170 -86,167.5 -86,165 -86,162.5 -86,160 -86,157.5 -86,155 -86,155 -84.3,155 -82.6,155 -80.9,155 -79.2,155 -77.5,155 -75.8,155 -74.1,155 -72.4,155 -70.7,155 -69,157.5 -69,160 -69,162.5 -69,165 -69,167.5 -69,170 -69,172.5 -69,175 -69,177.5 -69,-180 -69))"], "date_created": "Fri, 04 Apr 2025 00:00:00 GMT", "description": "The dataset includes model simulation results of the tsunami impact on the Ross Sea Ice Shelf, specifically the time sequence of the water surface elevation of the tsunami, generated by circum-Pacific-Rim subduction zone earthquakes. The model simulations utilized the boundary conditions provided by the Pacific-wide simulations. The simulation scenarios include two historical events, the September 16, 2025 tsunami generated by the Mw 8.3 Illapel, Chile earthquake and the March 11, 2011 tsunami generated by the Mw 9.1 Honshu, Japan earthquake. Also included are four scenarios generated by hypothetical Mw 8.6 earthquakes in the Alaska, Central America, Kermadec, and New Zealand-Tonga subduction zones, respectively. ", "east": -142.5, "geometry": ["POINT(-173.75 -77.5)"], "keywords": "Antarctica; Cryosphere; Model Simulation; Ross Ice Shelf; Ross Sea Ice Shelf; Subduction Zone Earthquakes; Tsunami; Tsunami impact; West Antarctica Ice Shelf", "locations": "Antarctica; West Antarctica Ice Shelf; Ross Sea Ice Shelf; Ross Ice Shelf", "north": -69.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Wei, Yong", "project_titles": "Collaborative Research: Do Ocean Wave Impacts Pose a Hazard to the Stability of West Antarctic Ice Shelves?", "projects": [{"proj_uid": "p0010320", "repository": "USAP-DC", "title": "Collaborative Research: Do Ocean Wave Impacts Pose a Hazard to the Stability of West Antarctic Ice Shelves?"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -86.0, "title": "Model simulations of tsunami propagation from Circum-Pacific Subduction Zone to West Antarctic Ice Shelves (Ross Sea)", "uid": "601922", "west": 155.0}, {"awards": "1947040 Postlethwait, John", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Tue, 25 Mar 2025 00:00:00 GMT", "description": "Similarity matrices of Notoxcellia spp.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Alveolata; Antarctic; Cryosphere; Notoxcellia Coronata; Notoxcellia Picta; Perkinsozoa; Xcellidae", "locations": "Antarctic", "north": -60.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Desvignes, Thomas; P\u00e9ron, Clara; Devine, Jennifer; Postlethwait, John", "project_titles": "EAGER: Origin and Physiological Consequences of a Neoplasm Outbreak in Antarctic Fish ", "projects": [{"proj_uid": "p0010221", "repository": "USAP-DC", "title": "EAGER: Origin and Physiological Consequences of a Neoplasm Outbreak in Antarctic Fish "}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Similarity matrices of Notoxcellia spp.", "uid": "601917", "west": -180.0}, {"awards": "1947040 Postlethwait, John", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Tue, 25 Mar 2025 00:00:00 GMT", "description": "Sequence alignments, model selection, and phylogenetic trees from the phylogenetic placement of Notoxcellia species within Xcellidae.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Alveolata; Antarctic; Cryosphere; Notoxcellia Coronata; Notoxcellia Picta; Perkinsozoa; Xcellidae", "locations": "Antarctic", "north": -60.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Desvignes, Thomas; P\u00e9ron, Clara; Devine, Jennifer; Postlethwait, John", "project_titles": "EAGER: Origin and Physiological Consequences of a Neoplasm Outbreak in Antarctic Fish ", "projects": [{"proj_uid": "p0010221", "repository": "USAP-DC", "title": "EAGER: Origin and Physiological Consequences of a Neoplasm Outbreak in Antarctic Fish "}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Phylogenetic Analysis of Notoxcellia species, including novel Ross Sea specimen", "uid": "601915", "west": -180.0}, {"awards": "1947040 Postlethwait, John", "bounds_geometry": ["POLYGON((165 -75,165.1 -75,165.2 -75,165.3 -75,165.4 -75,165.5 -75,165.6 -75,165.7 -75,165.8 -75,165.9 -75,166 -75,166 -75.05,166 -75.1,166 -75.15,166 -75.2,166 -75.25,166 -75.3,166 -75.35,166 -75.4,166 -75.45,166 -75.5,165.9 -75.5,165.8 -75.5,165.7 -75.5,165.6 -75.5,165.5 -75.5,165.4 -75.5,165.3 -75.5,165.2 -75.5,165.1 -75.5,165 -75.5,165 -75.45,165 -75.4,165 -75.35,165 -75.3,165 -75.25,165 -75.2,165 -75.15,165 -75.1,165 -75.05,165 -75))"], "date_created": "Tue, 25 Mar 2025 00:00:00 GMT", "description": "Gonad and skin histology of Trematomus loennbergii infected by Notoxcellia sp.", "east": 166.0, "geometry": ["POINT(165.5 -75.25)"], "keywords": "Alveolata; Antarctica; Cryosphere; Notoxcellia Coronata; Notoxcellia Picta; Perkinsozoa; Ross Sea; Xcellidae", "locations": "Ross Sea; Antarctica", "north": -75.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Desvignes, Thomas; P\u00e9ron, Clara; Devine, Jennifer; Postlethwait, John", "project_titles": "EAGER: Origin and Physiological Consequences of a Neoplasm Outbreak in Antarctic Fish ", "projects": [{"proj_uid": "p0010221", "repository": "USAP-DC", "title": "EAGER: Origin and Physiological Consequences of a Neoplasm Outbreak in Antarctic Fish "}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -75.5, "title": "Gonad and skin histology of Trematomus loennbergii infected by Notoxcellia sp.", "uid": "601916", "west": 165.0}, {"awards": "1850988 Teets, Nicholas", "bounds_geometry": ["POLYGON((-64.067 -64.766,-64.05669999999999 -64.766,-64.04639999999999 -64.766,-64.03609999999999 -64.766,-64.02579999999999 -64.766,-64.0155 -64.766,-64.0052 -64.766,-63.994899999999994 -64.766,-63.9846 -64.766,-63.9743 -64.766,-63.964 -64.766,-63.964 -64.7688,-63.964 -64.7716,-63.964 -64.7744,-63.964 -64.77720000000001,-63.964 -64.78,-63.964 -64.7828,-63.964 -64.7856,-63.964 -64.7884,-63.964 -64.7912,-63.964 -64.794,-63.9743 -64.794,-63.9846 -64.794,-63.994899999999994 -64.794,-64.0052 -64.794,-64.0155 -64.794,-64.02579999999999 -64.794,-64.03609999999999 -64.794,-64.04639999999999 -64.794,-64.05669999999999 -64.794,-64.067 -64.794,-64.067 -64.7912,-64.067 -64.7884,-64.067 -64.7856,-64.067 -64.7828,-64.067 -64.78,-64.067 -64.77720000000001,-64.067 -64.7744,-64.067 -64.7716,-64.067 -64.7688,-64.067 -64.766))"], "date_created": "Mon, 24 Mar 2025 00:00:00 GMT", "description": "Environmental conditions are the major drivers of species distribution, and terrestrial Antarctica arguably presents the most dramatic challenges for its inhabitants. Many animals rely on acclimation to enhance their stress tolerance to face unfavorable conditions. Some animals can also rely on their phenotypic plasticity to respond to these unfavorable conditions without the need to slowly experience increasing levels of stress to enhance their stress tolerance (i.e., acclimate). \r\n\u003cbr/\u003eBelgica antarctica can rely on both types of strategies, but since they evolved to live in a habitat with such dramatic environmental changes as Antarctica, they are very sensitive to any type of stress (e.g., a sudden drop in temperature, or a bout of high-speed wind). Studying the extent to which B. antarctica rely on each of these strategies to survive and how environmental variation can shape this species\u2019 biology across distinct populations (i.e., that might experience distinct selective pressures) is important to help us better understand how polyextremophiles adapt and evolve while inhabiting extreme environments. This project focused on studying stress tolerance in B. antarctica populations of three distinct islands, Torgersen, Cormorant, and Outcast. In addition, we investigated how these responses to stress change between early- and late-summer (i.e., between larvae that recently finished overwintering - here referred as summer larvae, and larvae that are preparing to overwinter - here referred as winter larvae).", "east": -63.964, "geometry": ["POINT(-64.0155 -64.78)"], "keywords": "Antarctica; Belgica Antarctica; Cryosphere; Population Genetics", "locations": "Antarctica", "north": -64.766, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Sousa Lima, Cleverson; Michel, Andrew; Hayward, Scott; Teets, Nicholas", "project_titles": "NSFGEO-NERC: Mechanisms of Adaptation to Terrestrial Antarctica through Comparative Physiology and Genomics of Antarctic and sub-Antarctic Insects", "projects": [{"proj_uid": "p0010203", "repository": "USAP-DC", "title": "NSFGEO-NERC: Mechanisms of Adaptation to Terrestrial Antarctica through Comparative Physiology and Genomics of Antarctic and sub-Antarctic Insects"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.794, "title": "Temporal and spatial variation in stress tolerance in Belgica antarctica populations from distinct islands", "uid": "601873", "west": -64.067}, {"awards": "2038145 Bernard, Kim", "bounds_geometry": ["POLYGON((-66.11382 -55.75238333,-65.577321333 -55.75238333,-65.040822666 -55.75238333,-64.50432399900001 -55.75238333,-63.967825332000004 -55.75238333,-63.431326665 -55.75238333,-62.894827998 -55.75238333,-62.358329331 -55.75238333,-61.821830664 -55.75238333,-61.285331997 -55.75238333,-60.74883333 -55.75238333,-60.74883333 -57.285364997,-60.74883333 -58.818346664,-60.74883333 -60.351328331000005,-60.74883333 -61.884309998,-60.74883333 -63.417291665,-60.74883333 -64.950273332,-60.74883333 -66.483254999,-60.74883333 -68.016236666,-60.74883333 -69.549218333,-60.74883333 -71.0822,-61.285331997 -71.0822,-61.821830664 -71.0822,-62.358329331 -71.0822,-62.894827998 -71.0822,-63.431326665 -71.0822,-63.967825332000004 -71.0822,-64.50432399900001 -71.0822,-65.040822666 -71.0822,-65.577321333 -71.0822,-66.11382 -71.0822,-66.11382 -69.549218333,-66.11382 -68.016236666,-66.11382 -66.483254999,-66.11382 -64.950273332,-66.11382 -63.417291665,-66.11382 -61.884309998,-66.11382 -60.351328331,-66.11382 -58.818346664,-66.11382 -57.285364997,-66.11382 -55.75238333))"], "date_created": "Mon, 17 Mar 2025 00:00:00 GMT", "description": "This dataset contains measurements of the diameter and area of Antarctic krill (Euphausia superba) oocytes collected from the northern Antarctic Peninsula during the austral winter from 2012 to 2016 (August each year). Female oocytes were examined using the \"squash technique\" developed by Cuzin-Roudy and Amsler (1991) for assessing ovarian development and sexual maturity. The squash method provides a detailed view of oocyte size, which serves as an indicator of reproductive status and energy allocation during the winter months. Data were collected and processed according to the methods described by Steinke et al. (2024). The dataset includes .csv files containing oocyte diameter and area measurements for individual female krill. These data are valuable for understanding krill reproductive cycles and their ecological responses to environmental variability. Data users should acknowledge the project and grant number, as well as credit Dr. Kim Bernard, Dr. Kirsten Steinke, and Dr. Christian Reiss. The research was conducted in collaboration with the US National Oceanic and Atmospheric Administration Antarctic Marine Living Resources group.", "east": -60.74883333, "geometry": ["POINT(-63.431326665 -63.417291665)"], "keywords": "Antarctica; Biota; Cryosphere; Krill; Oceans; Southern Ocean", "locations": "Antarctica; Southern Ocean", "north": -55.75238333, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Bernard, Kim", "project_titles": "Drivers of Antarctic Krill Reproductive Output", "projects": [{"proj_uid": "p0010312", "repository": "USAP-DC", "title": "Drivers of Antarctic Krill Reproductive Output"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -71.0822, "title": "Winter Female Krill Oocyte Size", "uid": "601919", "west": -66.11382}, {"awards": "2423761 Blackburn, Terrence; 2042495 Blackburn, Terrence", "bounds_geometry": ["POLYGON((-180 -75,-144 -75,-108 -75,-72 -75,-36 -75,0 -75,36 -75,72 -75,108 -75,144 -75,180 -75,180 -76.5,180 -78,180 -79.5,180 -81,180 -82.5,180 -84,180 -85.5,180 -87,180 -88.5,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -88.5,-180 -87,-180 -85.5,-180 -84,-180 -82.5,-180 -81,-180 -79.5,-180 -78,-180 -76.5,-180 -75))"], "date_created": "Mon, 17 Mar 2025 00:00:00 GMT", "description": "This dataset includes geochemical analyses of carbonate nodules collected at Elephant Moraine and the Pensacola Mountains, East Antarctica. Oxygen and uranium-series isotope analyses indicate that these carbonates precipitated from glacial meltwater during deglacial periods in the late Pleistocene. Carbonate \u03b413C values as low as -32.75 \u2030 identify thermogenic methane as a primary carbon source, while clumped isotope measurements indicate formation temperatures of 12 - 20\u02daC, consistent with a geothermal origin. Lipid biomarker analyses further show that organic matter preserved in the nodules is highly thermally matured. These findings indicate that deep-sourced thermogenic methane migrated as hydrocarbon seeps to shallow pore spaces within basal sediments, demonstrating that geothermally active areas can be hotspots for methane accumulation below the Antarctic Ice Sheet. This material is based on services provided by the Polar Rock Repository with support from the National Science Foundation, under Cooperative Agreement OPP-2137467.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Carbon Isotopes; Cryosphere; East Antarctica; Elephant Moraine; Geochronology; Isotope Data; Subglacial", "locations": "Antarctica; Elephant Moraine; East Antarctica", "north": -75.0, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Earth Sciences", "persons": "Piccione, Gavin", "project_titles": "Collaborative Research: Reconstructing East Antarctica\u2019s Past Response to Climate using Subglacial Precipitates; EAGER: Pedogenic Carbonates Record Insolation Driven Surface Melting in Antarctica", "projects": [{"proj_uid": "p0010459", "repository": "USAP-DC", "title": "EAGER: Pedogenic Carbonates Record Insolation Driven Surface Melting in Antarctica"}, {"proj_uid": "p0010192", "repository": "USAP-DC", "title": "Collaborative Research: Reconstructing East Antarctica\u2019s Past Response to Climate using Subglacial Precipitates"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Thermogenic Methane Production in Antarctic Subglacial Hydrocarbon Seeps", "uid": "601918", "west": -180.0}, {"awards": "1850988 Teets, Nicholas", "bounds_geometry": ["POLYGON((-64.067 -64.766,-64.05669999999999 -64.766,-64.04639999999999 -64.766,-64.03609999999999 -64.766,-64.02579999999999 -64.766,-64.0155 -64.766,-64.0052 -64.766,-63.994899999999994 -64.766,-63.9846 -64.766,-63.9743 -64.766,-63.964 -64.766,-63.964 -64.7688,-63.964 -64.7716,-63.964 -64.7744,-63.964 -64.77720000000001,-63.964 -64.78,-63.964 -64.7828,-63.964 -64.7856,-63.964 -64.7884,-63.964 -64.7912,-63.964 -64.794,-63.9743 -64.794,-63.9846 -64.794,-63.994899999999994 -64.794,-64.0052 -64.794,-64.0155 -64.794,-64.02579999999999 -64.794,-64.03609999999999 -64.794,-64.04639999999999 -64.794,-64.05669999999999 -64.794,-64.067 -64.794,-64.067 -64.7912,-64.067 -64.7884,-64.067 -64.7856,-64.067 -64.7828,-64.067 -64.78,-64.067 -64.77720000000001,-64.067 -64.7744,-64.067 -64.7716,-64.067 -64.7688,-64.067 -64.766))"], "date_created": "Wed, 12 Mar 2025 00:00:00 GMT", "description": "Insects are known for occurring in any biome due to their outstanding phenotypic plasticity, reproductive ability, and environmental resilience, but only a few species can survive Antarctica\u2019s environmental conditions. The chironomid midge Belgica antarctica is the only insect species endemic to Antarctica, and it has evolved throughout Antarctica\u2019s history and remains active until this day. Recent work has shown that B. antarctica has been isolated from its closest relatives for over 30 million years, which has allowed it to evolve specialized adaptations to thrive in Antarctica\u2019s harsh terrestrial ecosystems. A closely related midge, Eretmoptera murphyi, which is endemic to South Georgia (a sub-Antarctic Island), has invaded Signy Island (a Maritime Antarctica island), and the invasion was facilitated in part by its surprising ability to cope with abiotic stress. Also, the extent of the threat that E. murphyi, as an invasive species, can pose to B. antarctica has been not directly addressed.", "east": -63.964, "geometry": ["POINT(-64.0155 -64.78)"], "keywords": "Antarctica; Belgica Antarctica; Cryosphere", "locations": "Antarctica", "north": -64.766, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Sousa Lima, Cleverson; Aquilino, Monica; Kawarasaki, Yuta; Pavinato, Vitor; Gantz, Josiah D.; Devlin, Jack; Michel, Andrew; Hayward, Scott; Teets, Nicholas", "project_titles": "NSFGEO-NERC: Mechanisms of Adaptation to Terrestrial Antarctica through Comparative Physiology and Genomics of Antarctic and sub-Antarctic Insects", "projects": [{"proj_uid": "p0010203", "repository": "USAP-DC", "title": "NSFGEO-NERC: Mechanisms of Adaptation to Terrestrial Antarctica through Comparative Physiology and Genomics of Antarctic and sub-Antarctic Insects"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.794, "title": "Stress tolerance in Belgica antarctica and Eretmoptera murphyi", "uid": "601871", "west": -64.067}, {"awards": "1929991 Pettit, Erin C", "bounds_geometry": ["POLYGON((-106.5 -74.5,-106.3 -74.5,-106.1 -74.5,-105.9 -74.5,-105.7 -74.5,-105.5 -74.5,-105.3 -74.5,-105.1 -74.5,-104.9 -74.5,-104.7 -74.5,-104.5 -74.5,-104.5 -74.6,-104.5 -74.7,-104.5 -74.8,-104.5 -74.9,-104.5 -75,-104.5 -75.1,-104.5 -75.2,-104.5 -75.3,-104.5 -75.4,-104.5 -75.5,-104.7 -75.5,-104.9 -75.5,-105.1 -75.5,-105.3 -75.5,-105.5 -75.5,-105.7 -75.5,-105.9 -75.5,-106.1 -75.5,-106.3 -75.5,-106.5 -75.5,-106.5 -75.4,-106.5 -75.3,-106.5 -75.2,-106.5 -75.1,-106.5 -75,-106.5 -74.9,-106.5 -74.8,-106.5 -74.7,-106.5 -74.6,-106.5 -74.5))"], "date_created": "Tue, 11 Mar 2025 00:00:00 GMT", "description": "Monthly velocity composites were produced from January 2016 to December 2022 using Sentinel-1 Interferometric Wide Swath (IW) mode using standard feature/speckle tracking procedures. From 2016 to 2021, up to 10 mosaics per month were averaged (Sentinel 1A and Sentinel 1B). After Sentinel-1B ended in December 2021, mosaics decreased to 2 per month (12-day pairs only from Sentinel 1A), producing more noisy data and larger data gaps. We used 6- and 12-day Sentinel-1 image pairs from the archive and a feature tracking window of 416 \u00d7 128 pixels (\u223c1 km in range and azimuth). We sampled the velocity field at 50 \u00d7 10 pixels before geocoding to the Antarctic Polar Stereographic projection (EPSG:3031) at 100 m resolution using the REMA mosaic DEM. DEM gaps were filled using Bedmap2 surface topography data.", "east": -104.5, "geometry": ["POINT(-105.5 -75)"], "keywords": "Antarctica; Cryosphere; Glaciology; Ice Shelf; Thwaites Glacier; Velocity", "locations": "Antarctica; Thwaites Glacier", "north": -74.5, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Banerjee, Debangshu; Lilien, David; Luckman, Adrian; Truffer, Martin; Wild, Christian; Pettit, Erin; Scambos, Ted; Muto, Atsuhiro; Alley, Karen", "project_titles": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment", "projects": [{"proj_uid": "p0010162", "repository": "USAP-DC", "title": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -75.5, "title": "Sentinel-1-derived monthly-averaged velocity components from Thwaites Eastern Ice Shelf, 2016 - 2022", "uid": "601914", "west": -106.5}, {"awards": "1443386 Emslie, Steven; 2135695 Emslie, Steven", "bounds_geometry": null, "date_created": "Tue, 11 Mar 2025 00:00:00 GMT", "description": "We completed multiple-stable isotope analyses (d13C, d15N, and d34S) of Ad\u00e9lie penguin Pygoscelis adeliae chick-bone collagen to characterize differences in foraging behavior among 15 colony locations across the Ross Sea region. Foraging behavior was represented by d13C, d15N, and d34S values and classified into groups using k-means cluster analyses. Additionally, we report the first stable isotope values for the Ad\u00e9lie penguin colony on Sabrina Island, Balleny Islands. Cluster analyses revealed distinct isotopic signatures for the northernmost and central colonies; however, owing to spatial and temporal variability, isotopic signatures were not strong enough to distinguish the southernmost colonies. Results also indicated that d15N values increased with latitude (66\u201377\u00b0 S), corresponding to higher krill consumption at colonies that foraged in sensible heat polynyas or the open ocean and increased fish consumption for those foraging in latent heat polynyas to the south. Generally, d34S values are used to distinguish foraging grounds, specifically inshore/offshore foraging or foraging over the continental slope versus the continental shelf, in marine animals. Although the southern and central colonies currently forage along the continental shelf and the northern colonies forage over the shelf, slope, and/or open ocean, we found no significant difference in d34S values among colonies. While a positive correlation between d15N and d34S values was evident, d34S signatures did not exhibit distinct patterns specific to individual colonies or regions. The absence of a clear trend reflecting inshore/offshore foraging underscores the need for additional research to bridge this knowledge gap.", "east": null, "geometry": null, "keywords": "Adelie Penguin; Antarctica; Cryosphere; Foraging; Polynya; Pygoscelis Adeliae; Ross Sea; Stable Isotopes", "locations": "Antarctica; Ross Sea", "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "Emslie, Steven D.; Reaves, Megan; Powers, Shannon", "project_titles": "Collaborative Research: Investigating Holocene Shifts in the Diets and Paleohistory of Antarctic Krill Predators; Collaborative Research: Using Multiple Stable Isotopes to Investigate Middle to Late Holocene Ecological Responses by Adelie Penguins in the Ross Sea", "projects": [{"proj_uid": "p0010388", "repository": "USAP-DC", "title": "Collaborative Research: Using Multiple Stable Isotopes to Investigate Middle to Late Holocene Ecological Responses by Adelie Penguins in the Ross Sea"}, {"proj_uid": "p0010047", "repository": "USAP-DC", "title": "Collaborative Research: Investigating Holocene Shifts in the Diets and Paleohistory of Antarctic Krill Predators"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Stable isotopes of Adelie Penguin chick bone collagen", "uid": "601913", "west": null}, {"awards": "2019719 Brook, Edward", "bounds_geometry": ["POLYGON((50 -84,55 -84,60 -84,65 -84,70 -84,75 -84,80 -84,85 -84,90 -84,95 -84,100 -84,100 -84.6,100 -85.2,100 -85.8,100 -86.4,100 -87,100 -87.6,100 -88.2,100 -88.8,100 -89.4,100 -90,95 -90,90 -90,85 -90,80 -90,75 -90,70 -90,65 -90,60 -90,55 -90,50 -90,50 -89.4,50 -88.8,50 -88.2,50 -87.6,50 -87,50 -86.4,50 -85.8,50 -85.2,50 -84.6,50 -84))"], "date_created": "Mon, 10 Mar 2025 00:00:00 GMT", "description": "This dataset contains the basal ice unit thickness as measured by the NSF COLDEX MARFA ice-penetrating radar survey, which mainly focuses on the southern flank of Dome A. The \"basal ice unit\" is hereby defined as the bottom portion of the ice sheet where no clear and traceable englacial reflection is detected by the radar sounder. Raw radar data can be found at: https://doi.org/10.15784/601768. The basal ice unit is mapped using the DecisionSpace Geosciences 10ep software package. This dataset provides three data products:\r\n\u003cbr/\u003e\u2022 Thickness of the basal ice unit\r\n\u003cbr/\u003e\u2022 Thickness of the stratigraphic ice unit above the basal ice unit\r\n\u003cbr/\u003e\u2022 The shape of the basal ice unit boundary, where rapid basal ice unit thinning is observed in the middle of the South Pole Basin.", "east": 100.0, "geometry": ["POINT(75 -87)"], "keywords": "Antarctica; Coldex; Cryosphere; East Antarctica; East Antarctic Plateau; Glaciology; Radar Echo Sounder", "locations": "Antarctica; East Antarctica; East Antarctic Plateau", "north": -84.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Yan, Shuai; Young, Duncan A.; Vega Gonzalez, Alejandra; Singh, Shivangini; Kerr, Megan; Blankenship, Donald D.", "project_titles": "Center for Oldest Ice Exploration", "projects": [{"proj_uid": "p0010321", "repository": "USAP-DC", "title": "Center for Oldest Ice Exploration"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "COLDEX", "south": -90.0, "title": "Basal Ice Unit Thickness Mapped by the NSF COLDEX MARFA Ice Penetrating Radar", "uid": "601912", "west": 50.0}, {"awards": "2042495 Blackburn, Terrence", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Wed, 05 Mar 2025 00:00:00 GMT", "description": "This dataset contains U-series, d18O, d13C and 87Sr/86Sr data from 25 subglacial calcite precipitates from locations around the Antarctic ice sheet, primarily outlet glaciers near the ice sheet margins and nunataks in the Transantarctic mountains. Lat-lon data for each sample is given as well.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Cryosphere", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Gagliardi, Jessica", "project_titles": "Collaborative Research: Reconstructing East Antarctica\u2019s Past Response to Climate using Subglacial Precipitates", "projects": [{"proj_uid": "p0010192", "repository": "USAP-DC", "title": "Collaborative Research: Reconstructing East Antarctica\u2019s Past Response to Climate using Subglacial Precipitates"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Subglacial precipitates record Antarctic ice sheet response to Southern Ocean warming ", "uid": "601911", "west": -180.0}, {"awards": "1643873 Hansen, Samantha; 1643798 Emry, Erica", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Thu, 27 Feb 2025 00:00:00 GMT", "description": "This dataset provides the shear-wave velocity model resulting from a full-waveform inversion that was constrained using long-period empirical Green\u0027s functions extracted from ambient seismic noise. The results are highlighted in Hansen and Emry (2025).", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Ambient Seismic Noise; Antarctica; Cryosphere; Full-Waveform Inversion; Seismic Tomography; Shear Wave Velocity", "locations": "Antarctica; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Earth Sciences", "persons": "Emry, Erica; Hansen, Samantha", "project_titles": "Collaborative Research: Imaging Seismic Heterogeneity within the Antarctic Mantle with Full Waveform Ambient Noise Tomography", "projects": [{"proj_uid": "p0010139", "repository": "USAP-DC", "title": "Collaborative Research: Imaging Seismic Heterogeneity within the Antarctic Mantle with Full Waveform Ambient Noise Tomography"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Shear Wave Velocity of the Antarctic Upper Mantle from Full Waveform Inversion and Long Period Ambient Seismic Noise", "uid": "601909", "west": -180.0}, {"awards": "1947453 Hunt, Kathleen", "bounds_geometry": ["POLYGON((150 -60,152.9 -60,155.8 -60,158.7 -60,161.6 -60,164.5 -60,167.4 -60,170.3 -60,173.2 -60,176.1 -60,179 -60,179 -61.6,179 -63.2,179 -64.8,179 -66.4,179 -68,179 -69.6,179 -71.2,179 -72.8,179 -74.4,179 -76,176.1 -76,173.2 -76,170.3 -76,167.4 -76,164.5 -76,161.6 -76,158.7 -76,155.8 -76,152.9 -76,150 -76,150 -74.4,150 -72.8,150 -71.2,150 -69.6,150 -68,150 -66.4,150 -64.8,150 -63.2,150 -61.6,150 -60))"], "date_created": "Tue, 25 Feb 2025 00:00:00 GMT", "description": "Hormone meta data from the baleen of 5 blue whales and 5 fin whales sampled at 2cm intervals along the length of the plate. Data set includes meta data information regarding the individual whale including specimen ID, species, sex, hormone type, and dilution.", "east": 179.0, "geometry": ["POINT(164.5 -68)"], "keywords": "Antarctica; Biota; Blue Whale; Cryosphere; Fin Whale; Hormones; Oceans; Reproduction; Whales", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Fleming, Alyson; Hunt, Kathleen", "project_titles": "Collaborative Research: A New Baseline for Antarctic Blue and Fin Whales", "projects": [{"proj_uid": "p0010240", "repository": "USAP-DC", "title": "Collaborative Research: A New Baseline for Antarctic Blue and Fin Whales"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -76.0, "title": "Hormone meta data for Antarctic blue and fin whales", "uid": "601908", "west": 150.0}, {"awards": "1745116 Scambos, Ted", "bounds_geometry": ["POLYGON((-73 -70.5,-72.35 -70.5,-71.7 -70.5,-71.05 -70.5,-70.4 -70.5,-69.75 -70.5,-69.1 -70.5,-68.45 -70.5,-67.8 -70.5,-67.15 -70.5,-66.5 -70.5,-66.5 -70.8,-66.5 -71.1,-66.5 -71.4,-66.5 -71.7,-66.5 -72,-66.5 -72.3,-66.5 -72.6,-66.5 -72.9,-66.5 -73.2,-66.5 -73.5,-67.15 -73.5,-67.8 -73.5,-68.45 -73.5,-69.1 -73.5,-69.75 -73.5,-70.4 -73.5,-71.05 -73.5,-71.7 -73.5,-72.35 -73.5,-73 -73.5,-73 -73.2,-73 -72.9,-73 -72.6,-73 -72.3,-73 -72,-73 -71.7,-73 -71.4,-73 -71.1,-73 -70.8,-73 -70.5))"], "date_created": "Mon, 24 Feb 2025 00:00:00 GMT", "description": "Data were collected from two sites, one on the southern Wilkins and another on the southern George VI ice shelves. Both sites were investigated as potential sites of perennial firn aquifers; in the case of the southern Wilkins, an extensive firn aquifer was found (Montgomery et al., 2020). Data sources come from two early-model AMIGOS stations (Scambos et al., 2013), ice cores that were collected by hot-ring coring (Montgomery et al., 2020), and ground-penetrating radar profiles. Thermistor data from several depths within the firn core boreholes, transmitted by the AMIGOS stations, show the progression of the seasonal variations in firn temperature at the sites. Radar data show the depth of the firn aquifer (or, its absence at George VI site), and some drainage effects at a nearby rift at the Wilkins site.", "east": -66.5, "geometry": ["POINT(-69.75 -72)"], "keywords": "AMIGOS; Antarctica; Cryosphere; George VI Ice Shelf; Glaciology; Ground Penetrating Radar; Ice Core Data; Ice Shelf; Wilkins Ice Shelf", "locations": "Wilkins Ice Shelf; Antarctica", "north": -70.5, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Scambos, Ted; Miller, Julie; Miege, Clement; Montgomery, Lynn; Wallin, Bruce", "project_titles": "Antarctic Firn Aquifers: Extent, Characteristics, and Comparison with Greenland Occurrences", "projects": [{"proj_uid": "p0010126", "repository": "USAP-DC", "title": "Antarctic Firn Aquifers: Extent, Characteristics, and Comparison with Greenland Occurrences"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -73.5, "title": "Weather, Firn Core, and Ground-penetrating radar data from southern Wilkins and George VI ice shelves, 2018-2019", "uid": "601905", "west": -73.0}, {"awards": "2114839 Passchier, Sandra", "bounds_geometry": ["POLYGON((-109.05 -68.612,-108.8974 -68.612,-108.7448 -68.612,-108.59219999999999 -68.612,-108.4396 -68.612,-108.287 -68.612,-108.1344 -68.612,-107.98179999999999 -68.612,-107.8292 -68.612,-107.67660000000001 -68.612,-107.524 -68.612,-107.524 -68.62429999999999,-107.524 -68.6366,-107.524 -68.6489,-107.524 -68.6612,-107.524 -68.67349999999999,-107.524 -68.6858,-107.524 -68.6981,-107.524 -68.71039999999999,-107.524 -68.7227,-107.524 -68.735,-107.67660000000001 -68.735,-107.8292 -68.735,-107.98179999999999 -68.735,-108.1344 -68.735,-108.287 -68.735,-108.4396 -68.735,-108.59219999999999 -68.735,-108.7448 -68.735,-108.8974 -68.735,-109.05 -68.735,-109.05 -68.7227,-109.05 -68.71039999999999,-109.05 -68.6981,-109.05 -68.6858,-109.05 -68.67349999999999,-109.05 -68.6612,-109.05 -68.6489,-109.05 -68.6366,-109.05 -68.62429999999999,-109.05 -68.612))"], "date_created": "Mon, 24 Feb 2025 00:00:00 GMT", "description": "This dataset contains 40Ar/39Ar measurements on detrital mineral grains from ice-rafted detritus at International Ocean Discovery Program Sites U1532 and U1533 in the Amundsen Sea sector. The depositional age of the sediments is early Pliocene.", "east": -107.524, "geometry": ["POINT(-108.287 -68.67349999999999)"], "keywords": "40Ar/39Ar; Amundsen Sea; Amundsen Sea Sector; Antarctica; Cryosphere; Ice-Rafted Detritus; IODP; Paleoclimate; Pliocene; Provenance; Sedimentology", "locations": "Antarctica; Amundsen Sea; Amundsen Sea Sector", "north": -68.612, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Hemming, Sidney R.; Passchier, Sandra", "project_titles": "West Antarctic Ice-sheet Change and Paleoceanography in the Amundsen Sea Across the Pliocene Climatic Optimum", "projects": [{"proj_uid": "p0010252", "repository": "USAP-DC", "title": "West Antarctic Ice-sheet Change and Paleoceanography in the Amundsen Sea Across the Pliocene Climatic Optimum"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -68.735, "title": "Argon thermochronological data on Pliocene ice-rafted detrital mineral grains from IODP Expedition 379 in the Amundsen Sea sector", "uid": "601907", "west": -109.05}, {"awards": "1929991 Pettit, Erin C", "bounds_geometry": ["POLYGON((-106.5 -74.5,-106.3 -74.5,-106.1 -74.5,-105.9 -74.5,-105.7 -74.5,-105.5 -74.5,-105.3 -74.5,-105.1 -74.5,-104.9 -74.5,-104.7 -74.5,-104.5 -74.5,-104.5 -74.6,-104.5 -74.7,-104.5 -74.8,-104.5 -74.9,-104.5 -75,-104.5 -75.1,-104.5 -75.2,-104.5 -75.3,-104.5 -75.4,-104.5 -75.5,-104.7 -75.5,-104.9 -75.5,-105.1 -75.5,-105.3 -75.5,-105.5 -75.5,-105.7 -75.5,-105.9 -75.5,-106.1 -75.5,-106.3 -75.5,-106.5 -75.5,-106.5 -75.4,-106.5 -75.3,-106.5 -75.2,-106.5 -75.1,-106.5 -75,-106.5 -74.9,-106.5 -74.8,-106.5 -74.7,-106.5 -74.6,-106.5 -74.5))"], "date_created": "Fri, 21 Feb 2025 00:00:00 GMT", "description": "This dataset comprises GeoTiff files that capture the yearly averages of ice-flow velocity (including x- and y-components, and flow speed) and strain rates (longitudinal, transverse, and shear) for the Thwaites Eastern Ice Shelf (TEIS) from 2013 to 2022. The velocity grids were generated using ITS_LIVE image-pair velocities available throughout the year, ensuring a consistent extent and spatial resolution for each annual composite. These composites were created by stacking all available image pairs and taking the median value for each grid cell. Small data gaps near the grounding line were filled using bilinear interpolation. Each pixel in the grid represents the median value of all available pixels during the specified period. The data are gridded at a spatial resolution of 120m in a polar stereographic projection (EPSG:3031). Speed is given in metres per day (m/yr), and strain rates are given in units/day. Additional funding was received from NE/S006419/1.", "east": -104.5, "geometry": ["POINT(-105.5 -75)"], "keywords": "Antarctica; Cryosphere; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Glaciology; Ice Shelf; Remote Sensing; Satellite Imagery; Thwaites; Thwaites Glacier; Velocity", "locations": "Thwaites Glacier; Antarctica; Thwaites; Antarctica", "north": -74.5, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Banerjee, Debangshu; Lilien, David; Truffer, Martin; Luckman, Adrian; Wild, Christian; Pettit, Erin; Scambos, Ted; Muto, Atsuhiro; Alley, Karen", "project_titles": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment", "projects": [{"proj_uid": "p0010162", "repository": "USAP-DC", "title": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -75.5, "title": "Yearly velocity and strain-rate averages from the Thwaites Eastern Ice Shelf, 2013-2022", "uid": "601904", "west": -106.5}, {"awards": "1929991 Pettit, Erin C", "bounds_geometry": ["POLYGON((-106.5 -74.5,-106.3 -74.5,-106.1 -74.5,-105.9 -74.5,-105.7 -74.5,-105.5 -74.5,-105.3 -74.5,-105.1 -74.5,-104.9 -74.5,-104.7 -74.5,-104.5 -74.5,-104.5 -74.6,-104.5 -74.7,-104.5 -74.8,-104.5 -74.9,-104.5 -75,-104.5 -75.1,-104.5 -75.2,-104.5 -75.3,-104.5 -75.4,-104.5 -75.5,-104.7 -75.5,-104.9 -75.5,-105.1 -75.5,-105.3 -75.5,-105.5 -75.5,-105.7 -75.5,-105.9 -75.5,-106.1 -75.5,-106.3 -75.5,-106.5 -75.5,-106.5 -75.4,-106.5 -75.3,-106.5 -75.2,-106.5 -75.1,-106.5 -75,-106.5 -74.9,-106.5 -74.8,-106.5 -74.7,-106.5 -74.6,-106.5 -74.5))"], "date_created": "Fri, 21 Feb 2025 00:00:00 GMT", "description": "These datasets include detailed digitized shapefiles of surface fractures (polylines) and internal m\u00e9lange zones (polygons) within the pinning-point shear zone of the Thwaites Eastern Ice Shelf. They were created using high-resolution (15-meter) panchromatic bands from Landsat 7, 8, and 9, with data from 2002 to 2022. Monthly digitization from January 2020 to July 2022 was also performed using preprocessed Sentinel-1 Synthetic Aperture Radar (SAR) images. Each feature includes attributes such as length and orientation, recorded in the EPSG:3031 coordinate reference system, and detailed in the attribute table. Additional funding was received from NE/S006419/1", "east": -104.5, "geometry": ["POINT(-105.5 -75)"], "keywords": "Antarctica; Cryosphere; Fractures; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Shelf; Thwaites", "locations": "Thwaites; Antarctica; Thwaites", "north": -74.5, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Banerjee, Debangshu; Lilien, David; Truffer, Martin; Luckman, Adrian; Wild, Christian; Pettit, Erin; Scambos, Ted; Muto, Atsuhiro; Alley, Karen", "project_titles": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment", "projects": [{"proj_uid": "p0010162", "repository": "USAP-DC", "title": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -75.5, "title": "Pinning-point shear-zone fractures in Thwaites Eastern Ice Shelf (2002 - 2022)", "uid": "601903", "west": -106.5}, {"awards": "1853291 Girton, James", "bounds_geometry": ["POLYGON((-70 -58,-68.8 -58,-67.6 -58,-66.4 -58,-65.2 -58,-64 -58,-62.8 -58,-61.6 -58,-60.4 -58,-59.2 -58,-58 -58,-58 -58.8,-58 -59.6,-58 -60.4,-58 -61.2,-58 -62,-58 -62.8,-58 -63.6,-58 -64.4,-58 -65.2,-58 -66,-59.2 -66,-60.4 -66,-61.6 -66,-62.8 -66,-64 -66,-65.2 -66,-66.4 -66,-67.6 -66,-68.8 -66,-70 -66,-70 -65.2,-70 -64.4,-70 -63.6,-70 -62.8,-70 -62,-70 -61.2,-70 -60.4,-70 -59.6,-70 -58.8,-70 -58))"], "date_created": "Mon, 17 Feb 2025 00:00:00 GMT", "description": "This data file collects the initial processed versions of all upper-ocean and lower-atmosphere data streams (along with subsampled satellite and reanalysis products along the survey track) from the 2019/20 deployment of the APL-UW Wave Glider autonomous surface vehicle (SV3-153) in Drake Passage.\r\n\u003cbr/\u003e", "east": -58.0, "geometry": ["POINT(-64 -62)"], "keywords": "Antarctica; Cryosphere; Drake Passage; LMG1909; LMG2002; R/v Laurence M. Gould; Temperature; Wave Glider; Wind Speed", "locations": "Antarctica; Drake Passage", "north": -58.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Girton, James", "project_titles": "Wave Glider Observations of Surface Fluxes and Mixed-layer Processes in the Southern Ocean", "projects": [{"proj_uid": "p0010493", "repository": "USAP-DC", "title": "Wave Glider Observations of Surface Fluxes and Mixed-layer Processes in the Southern Ocean"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -66.0, "title": "APL-UW Southern Ocean Wave Glider Data from 2019/20 Mission", "uid": "601902", "west": -70.0}, {"awards": "2114839 Passchier, Sandra", "bounds_geometry": ["POINT(-109.05 -68.735)"], "date_created": "Thu, 13 Feb 2025 00:00:00 GMT", "description": "This dataset contains measurements of particle-size distributions on sediment from International Ocean Discovery Program Site U1533. Carbonate, and organic matter were removed through addition of 10mL aliquots of 30% H2O2 and 2mL aliquots of 10% HCl to ~50-100mL suspension on a hot plate. Dispersion was through heating with sodium pyrophosphate. Samples were measured on a Malvern Mastersizer 2000 with a Hydro 2000MU (A) accessory, using a Refractive index of 1.6 (Illite) and an absorption coefficient of 0.9. Results are in (vol. %) per size class, with diameter range equivalent to the diameter of spheres with the same volume as measured particles.", "east": -109.05, "geometry": ["POINT(-109.05 -68.735)"], "keywords": "Amundsen Sea Sector; Antarctica; Cryosphere; Glaciation; Grain Size; Pliocene; Sediment Core Data; Sedimentology", "locations": "Amundsen Sea Sector; Antarctica", "north": -68.735, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Passchier, Sandra; Mino-Moreira, Lisbeth", "project_titles": "West Antarctic Ice-sheet Change and Paleoceanography in the Amundsen Sea Across the Pliocene Climatic Optimum", "projects": [{"proj_uid": "p0010252", "repository": "USAP-DC", "title": "West Antarctic Ice-sheet Change and Paleoceanography in the Amundsen Sea Across the Pliocene Climatic Optimum"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -68.735, "title": "Grain-size data for the Pliocene section at IODP Site U1533, Amundsen Sea", "uid": "601900", "west": -109.05}, {"awards": "1927742 Fleming, Alyson", "bounds_geometry": ["POLYGON((150 -60,152.9 -60,155.8 -60,158.7 -60,161.6 -60,164.5 -60,167.4 -60,170.3 -60,173.2 -60,176.1 -60,179 -60,179 -61.6,179 -63.2,179 -64.8,179 -66.4,179 -68,179 -69.6,179 -71.2,179 -72.8,179 -74.4,179 -76,176.1 -76,173.2 -76,170.3 -76,167.4 -76,164.5 -76,161.6 -76,158.7 -76,155.8 -76,152.9 -76,150 -76,150 -74.4,150 -72.8,150 -71.2,150 -69.6,150 -68,150 -66.4,150 -64.8,150 -63.2,150 -61.6,150 -60))"], "date_created": "Thu, 13 Feb 2025 00:00:00 GMT", "description": "Bulk stable isotope data from the baleen of 5 blue whales and 5 fin whales sampled at 1cm intervals along the length of the plate. Data set includes meta data information regarding the individual whale including species ID, sex, whale length, pregnancy status, catch location, date, vessel name. ", "east": 179.0, "geometry": ["POINT(164.5 -68)"], "keywords": "Antarctica; Biota; Cryosphere; Isotope; Southern Ocean; Whales", "locations": "Southern Ocean; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Fleming, Alyson; Smith, Malia", "project_titles": "Collaborative Research: A New Baseline for Antarctic Blue and Fin Whales", "projects": [{"proj_uid": "p0010240", "repository": "USAP-DC", "title": "Collaborative Research: A New Baseline for Antarctic Blue and Fin Whales"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -76.0, "title": "Bulk stable isotope data of blue and fin whales", "uid": "601901", "west": 150.0}, {"awards": "2201129 Fischer, Karen", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Wed, 12 Feb 2025 00:00:00 GMT", "description": "This dataset contains the depths of negative velocity gradients that are potentially interpretable as the lithosphere-asthenosphere boundary (LAB) beneath Antarctica, derived from common conversion point stacking of Sp receiver functions. The dataset provides constraints on lithospheric thickness variations, particularly in West Antarctica, where a vertically localized LAB is observed at depths of 70\u2013100 km. In East Antarctica, two zones of well-defined LAB depths are present in regions near the coast at depths of 75-110 km (~140\u02daE) and 90-130 km (~115\u02daE). Interpretation of these results and comparison with prior studies are provided in the associated journal article (see References).", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Cryosphere; LAB; Lithosphere; Lithospheric Thickness", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Brown, Sarah; Fischer, Karen", "project_titles": "Probing the Western Antarctic Lithosphere and Asthenosphere with New Approaches to Imaging Seismic Wave Attenuation and Velocity", "projects": [{"proj_uid": "p0010339", "repository": "USAP-DC", "title": "Probing the Western Antarctic Lithosphere and Asthenosphere with New Approaches to Imaging Seismic Wave Attenuation and Velocity"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Lithospheric thicknesses in Antarctica from Sp receiver functions", "uid": "601899", "west": -180.0}, {"awards": "2201129 Fischer, Karen", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Wed, 12 Feb 2025 00:00:00 GMT", "description": "This dataset contains crustal thickness measurements at 99 individual broadband seismic stations across Antarctica derived from teleseismic Sp waves. Crustal thickness estimates were obtained by measuring the depth of the Sp phase associated with the crust-mantle boundary observed in single-station stacks of Sp receiver functions. The measurements offer new constraints on crustal structure in West and East Antarctica. Comparison with crustal thickness estimates from prior studies are provided in the associated journal article (see References).", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Crust; Cryosphere; Moho", "locations": "Antarctica; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Brown, Sarah; Fischer, Karen", "project_titles": "Probing the Western Antarctic Lithosphere and Asthenosphere with New Approaches to Imaging Seismic Wave Attenuation and Velocity", "projects": [{"proj_uid": "p0010339", "repository": "USAP-DC", "title": "Probing the Western Antarctic Lithosphere and Asthenosphere with New Approaches to Imaging Seismic Wave Attenuation and Velocity"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Crustal thicknesses in Antarctica from Sp receiver functions", "uid": "601898", "west": -180.0}, {"awards": "1744993 Higgins, John", "bounds_geometry": ["POINT(159.356125 -76.732376)"], "date_created": "Wed, 12 Feb 2025 00:00:00 GMT", "description": "Between about 2.8-0.9 Ma, Earth\u2019s climate was characterized by 40 kyr cycles, driven or paced by changes in the tilt of Earth\u2019s spin axis. Much is known about the 40k world from studies of deep-sea sediments, but our understanding of climate change during this period and the transition between the 40kyr glacial cycles from 2.8-0.9 Ma and the 100kyr glacial cycles of the last 0.9 Myr is incomplete because we lack records of Antarctic climate and direct records of atmospheric greenhouse gas concentrations. We propose to address these issues by building on our recent studies of \u003e1 Ma ice discovered in shallow ice cores in the Allan Hills Blue Ice Area (BIA), Antarctica. During the 2015-2016 field season we recovered ice from two nearby drill cores that dates to \u003e 2 million years in age using the 40Ar/38Ar ratio of the trapped gases. Our discovery of ice of this antiquity in two cores demonstrates that there is gas-record quality ice from the 40k world in the Allan Hills BIA. To further characterize the composition of Earth\u2019s atmosphere and Antarctic climate during the 40k world we request support for two field seasons to drill new large-volume (4\u201d or 9\u201d diameter) ice cores at sites where we have previously identified \u003e1 Ma ice and nearby sites where ground penetrating radar has identified bedrock features conducive to the preservation of old ice.", "east": 159.356125, "geometry": ["POINT(159.356125 -76.732376)"], "keywords": "Allan Hills; Antarctica; Cryosphere; Glaciology; Ice Core Data; MOT; Ocean Temperature; Paleoclimate; Xe/Kr", "locations": "Allan Hills; Antarctica", "north": -76.732376, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Higgins, John", "project_titles": "Center for Oldest Ice Exploration; Collaborative research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area ", "projects": [{"proj_uid": "p0010253", "repository": "USAP-DC", "title": "Collaborative research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area "}, {"proj_uid": "p0010321", "repository": "USAP-DC", "title": "Center for Oldest Ice Exploration"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.732376, "title": "MOT data (Xe/Kr) from Allan Hills ice cores ALHIC1901, 1902, and 1903", "uid": "601897", "west": 159.356125}, {"awards": "1744993 Higgins, John", "bounds_geometry": ["POINT(159.3562 -76.73243)"], "date_created": "Wed, 12 Feb 2025 00:00:00 GMT", "description": "Between about 2.8-0.9 Ma, Earth\u2019s climate was characterized by 40 kyr cycles, driven or paced by changes in the tilt of Earth\u2019s spin axis. Much is known about the 40k world from studies of deep-sea sediments, but our understanding of climate change during this period and the transition between the 40kyr glacial cycles from 2.8-0.9 Ma and the 100kyr glacial cycles of the last 0.9 Myr is incomplete because we lack records of Antarctic climate and direct records of atmospheric greenhouse gas concentrations. We propose to address these issues by building on our recent studies of \u003e1 Ma ice discovered in shallow ice cores in the Allan Hills Blue Ice Area (BIA), Antarctica. During the 2015-2016 field season we recovered ice from two nearby drill cores that dates to \u003e 2 million years in age using the 40Ar/38Ar ratio of the trapped gases. Our discovery of ice of this antiquity in two cores demonstrates that there is gas-record quality ice from the 40k world in the Allan Hills BIA. To further characterize the composition of Earth\u2019s atmosphere and Antarctic climate during the 40k world we request support for two field seasons to drill new large-volume (4\u201d or 9\u201d diameter) ice cores at sites where we have previously identified \u003e1 Ma ice and nearby sites where ground penetrating radar has identified bedrock features conducive to the preservation of old ice.\r\n\u003cbr/\u003e", "east": 159.3562, "geometry": ["POINT(159.3562 -76.73243)"], "keywords": "Allan Hills; Antarctica; Ch4; CO2; Cryosphere; Glaciology; Glaciology; Ice Core Data; Ice Core Records", "locations": "Antarctica; Allan Hills", "north": -76.73243, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Higgins, John", "project_titles": "Center for Oldest Ice Exploration; Collaborative research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area ", "projects": [{"proj_uid": "p0010253", "repository": "USAP-DC", "title": "Collaborative research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area "}, {"proj_uid": "p0010321", "repository": "USAP-DC", "title": "Center for Oldest Ice Exploration"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.73243, "title": "CO2 and CH4 from Allan Hills ice cores ALHIC1901, 1902, and 1903", "uid": "601896", "west": 159.3562}, {"awards": "2114454 Greenbaum, Jamin", "bounds_geometry": ["POLYGON((-118.2 -72.2,-116.98 -72.2,-115.76 -72.2,-114.54 -72.2,-113.32000000000001 -72.2,-112.1 -72.2,-110.88 -72.2,-109.66 -72.2,-108.44 -72.2,-107.22 -72.2,-106 -72.2,-106 -72.53,-106 -72.86,-106 -73.19,-106 -73.52,-106 -73.85,-106 -74.18,-106 -74.51,-106 -74.84,-106 -75.17,-106 -75.5,-107.22 -75.5,-108.44 -75.5,-109.66 -75.5,-110.88 -75.5,-112.1 -75.5,-113.32000000000001 -75.5,-114.54 -75.5,-115.76 -75.5,-116.98 -75.5,-118.2 -75.5,-118.2 -75.17,-118.2 -74.84,-118.2 -74.51,-118.2 -74.18,-118.2 -73.85,-118.2 -73.52,-118.2 -73.19,-118.2 -72.86,-118.2 -72.53,-118.2 -72.2))"], "date_created": "Tue, 11 Feb 2025 00:00:00 GMT", "description": "This dataset contains ocean profile measurements from Airborne Expendable Conductivity, Temperature, Depth (AXCTD) and Airborne Expendable Bathy-Thermograph (AXBT) sensors deployed by helicopter and from the RV Araon research icebreaker. 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Much is known about the 40k world from studies of deep-sea sediments, but our understanding of climate change during this period and the transition between the 40kyr glacial cycles from 2.8-0.9 Ma and the 100kyr glacial cycles of the last 0.9 Myr is incomplete because we lack records of Antarctic climate and direct records of atmospheric greenhouse gas concentrations. We propose to address these issues by building on our recent studies of \u003e1 Ma ice discovered in shallow ice cores in the Allan Hills Blue Ice Area (BIA), Antarctica. During the 2015-2016 field season we recovered ice from two nearby drill cores that dates to \u003e 2 million years in age using the 40Ar/38Ar ratio of the trapped gases. Our discovery of ice of this antiquity in two cores demonstrates that there is gas-record quality ice from the 40k world in the Allan Hills BIA. To further characterize the composition of Earth\u2019s atmosphere and Antarctic climate during the 40k world we request support for two field seasons to drill new large-volume (4\u201d or 9\u201d diameter) ice cores at sites where we have previously identified \u003e1 Ma ice and nearby sites where ground penetrating radar has identified bedrock features conducive to the preservation of old ice. ", "east": null, "geometry": null, "keywords": "Allan Hills; Antarctica; Cryosphere; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Noble Gas", "locations": "Antarctica; Allan Hills", "north": null, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Higgins, John", "project_titles": "Center for Oldest Ice Exploration; Collaborative research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area ", "projects": [{"proj_uid": "p0010253", "repository": "USAP-DC", "title": "Collaborative research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area "}, {"proj_uid": "p0010321", "repository": "USAP-DC", "title": "Center for Oldest Ice Exploration"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": null, "title": "Heavy noble gases (Ar/Xe/Kr) from ALHIC1901, 1902, and 1903", "uid": "601895", "west": null}, {"awards": "1947040 Postlethwait, John", "bounds_geometry": ["POLYGON((-63 -64,-57.8 -64,-52.6 -64,-47.4 -64,-42.2 -64,-37 -64,-31.799999999999997 -64,-26.6 -64,-21.4 -64,-16.199999999999996 -64,-11 -64,-11 -65.3,-11 -66.6,-11 -67.9,-11 -69.2,-11 -70.5,-11 -71.8,-11 -73.1,-11 -74.4,-11 -75.7,-11 -77,-16.2 -77,-21.4 -77,-26.6 -77,-31.8 -77,-37 -77,-42.2 -77,-47.4 -77,-52.6 -77,-57.800000000000004 -77,-63 -77,-63 -75.7,-63 -74.4,-63 -73.1,-63 -71.8,-63 -70.5,-63 -69.2,-63 -67.9,-63 -66.6,-63 -65.3,-63 -64))"], "date_created": "Tue, 11 Feb 2025 00:00:00 GMT", "description": "Morphological, fecundity, and age data of Trematomus scotti from Andvord Bay and the Weddell Sea.", "east": -11.0, "geometry": ["POINT(-37 -70.5)"], "keywords": "Age; Antarctica; Biota; Cryonotothenioid; Cryosphere; Fecundity; Growth; Length; Nototheniidae; Oceans; Otolith; Reproduction; Weight", "locations": "Antarctica; Antarctica", "north": -64.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Desvignes, Thomas; Valdivieso, Alejandro; Sguotti, Camilla; Cal\u00ec, Federico; Riginella, Emilio; Streeter, Margaret; Grondin, Jacob; Le Francois, Nathalie; Lucassen, Magnus; Mark, Felix C; Detrich, H. 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Associated plankton and oceanographic data.", "east": -35.0, "geometry": ["POINT(-37 -54.25)"], "keywords": "Abundance; Antarctica; Antarctic Winter; Birds; Cryosphere; CTD; Mammals; Plankton; South Georgia Island", "locations": "Antarctica; South Georgia Island", "north": -53.5, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Manne, Lisa; Veit, Richard; Santora, Jarrod; Czapanskiy, Max", "project_titles": "Collaborative Research: Climate, Changing Abundance and Species Interactions of Marine Birds and Mammals at South Georgia in Winter", "projects": [{"proj_uid": "p0010382", "repository": "USAP-DC", "title": "Collaborative Research: Climate, Changing Abundance and Species Interactions of Marine Birds and Mammals at South Georgia in Winter"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -55.0, "title": "Bird, Mammal, Plankton, Oceanographic data, South Georgia, July 2023", "uid": "601890", "west": -39.0}, {"awards": "1745130 Moran, Amy", "bounds_geometry": null, "date_created": "Fri, 31 Jan 2025 00:00:00 GMT", "description": "This dataset includes oxygen consumption rates of larvae of the sea spider Nymphon australe acclimated in the laboratory to two different temperatures, assessed across four different temperatures. The dataset also includes oxygen consumption measured at the same range of temperatures between larvae collected in the field in the late winter (cold) and mid spring (slightly warmer).", "east": null, "geometry": null, "keywords": "Antarctica; Cryosphere; McMurdo; Temperature", "locations": "McMurdo; Antarctica", "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Moran, Amy; Lobert, Graham; Toh, MIng Wei Aaron", "project_titles": "Thermal Sensitivity of Antarctic Embryos and Larvae: Effects of Temperature on Metabolism, Developmental Rate, and the Metabolic Cost of Development ", "projects": [{"proj_uid": "p0010187", "repository": "USAP-DC", "title": "Thermal Sensitivity of Antarctic Embryos and Larvae: Effects of Temperature on Metabolism, Developmental Rate, and the Metabolic Cost of Development "}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Temperature acclimation and acclimatization of sea spider larvae", "uid": "601889", "west": null}, {"awards": "1745130 Moran, Amy", "bounds_geometry": null, "date_created": "Fri, 31 Jan 2025 00:00:00 GMT", "description": "This dataset includes cleavage rates of embryos of three species of Antarctic embryos that were reared at a range of temperatures up to the 32-cell stage.", "east": null, "geometry": null, "keywords": "Antarctica; Cryosphere; McMurdo; Temperature", "locations": "Antarctica; McMurdo", "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Moran, Amy; Lobert, Graham; Toh, Ming Wei Aaron", "project_titles": "Thermal Sensitivity of Antarctic Embryos and Larvae: Effects of Temperature on Metabolism, Developmental Rate, and the Metabolic Cost of Development ", "projects": [{"proj_uid": "p0010187", "repository": "USAP-DC", "title": "Thermal Sensitivity of Antarctic Embryos and Larvae: Effects of Temperature on Metabolism, Developmental Rate, and the Metabolic Cost of Development "}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Effect of temperature on cleavage rate of Antarctic invertebrates", "uid": "601887", "west": null}, {"awards": "1745130 Moran, Amy", "bounds_geometry": null, "date_created": "Fri, 31 Jan 2025 00:00:00 GMT", "description": "This dataset contains oxygen consumption of larvae of four different species of marine invertebrate, measured at four different temperatures.", "east": null, "geometry": null, "keywords": "Antarctica; Cryosphere; McMurdo; Temperature", "locations": "McMurdo; Antarctica", "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Moran, Amy; Lobert, Graham; Toh, MIng Wei Aaron", "project_titles": "Thermal Sensitivity of Antarctic Embryos and Larvae: Effects of Temperature on Metabolism, Developmental Rate, and the Metabolic Cost of Development ", "projects": [{"proj_uid": "p0010187", "repository": "USAP-DC", "title": "Thermal Sensitivity of Antarctic Embryos and Larvae: Effects of Temperature on Metabolism, Developmental Rate, and the Metabolic Cost of Development "}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Effect of temperature on oxygen consumption rates of larvae of four Antarctic marine invertebrates", "uid": "601888", "west": null}, {"awards": "1745130 Moran, Amy", "bounds_geometry": null, "date_created": "Wed, 29 Jan 2025 00:00:00 GMT", "description": "This dataset contains a proximal composition analysis and ash-free dry weight data from embryos and larvae of four different Antarctic marine invertebrates that were raised for two months at four different temperatures. The dataset also contains the length of different developmental stages at different temperatures. Samples were collected and experiments were performed between 2019 and 2022 at McMurdo Station, Antarctica. ", "east": null, "geometry": null, "keywords": "Antarctica; Cryosphere; McMurdo; Temperature", "locations": "McMurdo; Antarctica", "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Moran, Amy; Toh, Ming Wei Aaron; Lobert, Graham", "project_titles": "Thermal Sensitivity of Antarctic Embryos and Larvae: Effects of Temperature on Metabolism, Developmental Rate, and the Metabolic Cost of Development ", "projects": [{"proj_uid": "p0010187", "repository": "USAP-DC", "title": "Thermal Sensitivity of Antarctic Embryos and Larvae: Effects of Temperature on Metabolism, Developmental Rate, and the Metabolic Cost of Development "}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Temperature effects on proximal composition and development rate of embryos and larvae of four Antarctic invertebrates", "uid": "601886", "west": null}, {"awards": "1744584 Klein, Andrew; 1744550 Amsler, Charles; 1744570 Galloway, Aaron; 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All counts of Odontaster validus from SSWS surveys at the McMurdo Intake Jetty and Cinder Cones", "uid": "601869", "west": null}, {"awards": "1850988 Teets, Nicholas", "bounds_geometry": ["POINT(-64.0162 -64.7992)"], "date_created": "Sat, 04 Jan 2025 00:00:00 GMT", "description": "This dataset contains survival data for larvae of Belgica antarctica exposed to varying levels of cold, heat, desiccation, and salinity for 24 h. The goal of the experiment was to determine the lethal level for each of these distinct, ecologically relevant stressors.", "east": -64.0162, "geometry": ["POINT(-64.0162 -64.7992)"], "keywords": "Antarctica; Antarctic Peninsula; Cryosphere", "locations": "Antarctica; Antarctic Peninsula; Antarctica", "north": -64.7992, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Teets, Nicholas", "project_titles": "NSFGEO-NERC: Mechanisms of Adaptation to Terrestrial Antarctica through Comparative Physiology and Genomics of Antarctic and sub-Antarctic Insects", "projects": [{"proj_uid": "p0010203", "repository": "USAP-DC", "title": "NSFGEO-NERC: Mechanisms of Adaptation to Terrestrial Antarctica through Comparative Physiology and Genomics of Antarctic and sub-Antarctic Insects"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.7992, "title": "Multiple stress tolerance in the Antarctic midge", "uid": "601867", "west": -64.0162}, {"awards": "1850988 Teets, Nicholas", "bounds_geometry": ["POLYGON((-64.074764 -64.771683,-64.06381760000001 -64.771683,-64.0528712 -64.771683,-64.0419248 -64.771683,-64.0309784 -64.771683,-64.020032 -64.771683,-64.0090856 -64.771683,-63.9981392 -64.771683,-63.9871928 -64.771683,-63.9762464 -64.771683,-63.9653 -64.771683,-63.9653 -64.7739047,-63.9653 -64.7761264,-63.9653 -64.77834809999999,-63.9653 -64.7805698,-63.9653 -64.7827915,-63.9653 -64.7850132,-63.9653 -64.78723489999999,-63.9653 -64.7894566,-63.9653 -64.7916783,-63.9653 -64.7939,-63.9762464 -64.7939,-63.9871928 -64.7939,-63.9981392 -64.7939,-64.0090856 -64.7939,-64.020032 -64.7939,-64.0309784 -64.7939,-64.0419248 -64.7939,-64.0528712 -64.7939,-64.06381760000001 -64.7939,-64.074764 -64.7939,-64.074764 -64.7916783,-64.074764 -64.7894566,-64.074764 -64.78723489999999,-64.074764 -64.7850132,-64.074764 -64.7827915,-64.074764 -64.7805698,-64.074764 -64.77834809999999,-64.074764 -64.7761264,-64.074764 -64.7739047,-64.074764 -64.771683))"], "date_created": "Fri, 03 Jan 2025 00:00:00 GMT", "description": "For this study, larvae of Belgica antarctica were exposed to varying concentrations of microplastics in lab conditions. After exposing larvae for 10 days, we measured a variety of physiological outcomes, including survival, metabolic rate, and energy store levels (carbohydrates, lipids, and proteins).", "east": -63.9653, "geometry": ["POINT(-64.020032 -64.7827915)"], "keywords": "Antarctica; Antarctic Peninsula; Cryosphere", "locations": "Antarctic Peninsula; Antarctica", "north": -64.771683, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Teets, Nicholas; Devlin, Jack", "project_titles": "NSFGEO-NERC: Mechanisms of Adaptation to Terrestrial Antarctica through Comparative Physiology and Genomics of Antarctic and sub-Antarctic Insects", "projects": [{"proj_uid": "p0010203", "repository": "USAP-DC", "title": "NSFGEO-NERC: Mechanisms of Adaptation to Terrestrial Antarctica through Comparative Physiology and Genomics of Antarctic and sub-Antarctic Insects"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.7939, "title": "Data from microplastics exposure in Belgica antarctica", "uid": "601866", "west": -64.074764}, {"awards": "1947562 van Gestel, Natasja", "bounds_geometry": ["POLYGON((-64.0898264 -64.7704833,-64.08444765 -64.7704833,-64.07906890000001 -64.7704833,-64.07369015 -64.7704833,-64.0683114 -64.7704833,-64.06293265 -64.7704833,-64.0575539 -64.7704833,-64.05217515 -64.7704833,-64.04679639999999 -64.7704833,-64.04141765 -64.7704833,-64.0360389 -64.7704833,-64.0360389 -64.77082025,-64.0360389 -64.77115719999999,-64.0360389 -64.77149415,-64.0360389 -64.7718311,-64.0360389 -64.77216805,-64.0360389 -64.772505,-64.0360389 -64.77284195,-64.0360389 -64.7731789,-64.0360389 -64.77351585,-64.0360389 -64.7738528,-64.04141765 -64.7738528,-64.04679639999999 -64.7738528,-64.05217515 -64.7738528,-64.0575539 -64.7738528,-64.06293265 -64.7738528,-64.0683114 -64.7738528,-64.07369015 -64.7738528,-64.07906890000001 -64.7738528,-64.08444765 -64.7738528,-64.0898264 -64.7738528,-64.0898264 -64.77351585,-64.0898264 -64.7731789,-64.0898264 -64.77284195,-64.0898264 -64.772505,-64.0898264 -64.77216805,-64.0898264 -64.7718311,-64.0898264 -64.77149415,-64.0898264 -64.77115719999999,-64.0898264 -64.77082025,-64.0898264 -64.7704833))"], "date_created": "Fri, 03 Jan 2025 00:00:00 GMT", "description": "This data set contains soil temperature, soil moisture, and soil conductivity data in the vicinity of Palmer Station. TEROS12 sensors are installed in 40 plots that are distributed along an increasing primary productivity gradient (i.e., with increasing distance from the Marr Ice Piedmont glacier). The sensors are comprised of 5 cm long metal pins that are inserted straight down into the soil and hence, data are collected from the upper 0-5 cm of the soil. There are 4 sites along the gradient (site 1 is closest to the glacier and site 4 is farthest from the glacier), with ten plots at each site. Half of the plots at each site are plots that contain an open-top chamber and the other half of the plots are control (unwarmed) plots. Plot ids will contain \"W\" for warmed plots and \"C\" for control plots. Raw data from the loggers (logged every 20 minutes), as well as an R Markdown file is provided to facilitate reading in and displaying the daily average soil moisture and temperature data at the plot and at the treatment level for each productivity site. Loggers and sensors were installed in December 2022 and were downloaded in November (sites 2-4) and in December (site 1) of 2024. ", "east": -64.0360389, "geometry": ["POINT(-64.06293265 -64.77216805)"], "keywords": "Antarctica; Antarctic Peninsula; Conductivity; Cryosphere; Palmer Station; Soil; Temperature", "locations": "Antarctica; Antarctic Peninsula; Palmer Station", "north": -64.7704833, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "van Gestel, Natasja", "project_titles": "Antarctica as a Model System for Responses of Terrestrial Carbon Balance to Warming", "projects": [{"proj_uid": "p0010251", "repository": "USAP-DC", "title": "Antarctica as a Model System for Responses of Terrestrial Carbon Balance to Warming"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.7738528, "title": "Soil moisture and soil temperature data (0-5 cm) near Palmer Station, Antarctica", "uid": "601877", "west": -64.0898264}, {"awards": "1850988 Teets, Nicholas", "bounds_geometry": ["POLYGON((-64.067 -64.766,-64.05669999999999 -64.766,-64.04639999999999 -64.766,-64.03609999999999 -64.766,-64.02579999999999 -64.766,-64.0155 -64.766,-64.0052 -64.766,-63.994899999999994 -64.766,-63.9846 -64.766,-63.9743 -64.766,-63.964 -64.766,-63.964 -64.7688,-63.964 -64.7716,-63.964 -64.7744,-63.964 -64.77720000000001,-63.964 -64.78,-63.964 -64.7828,-63.964 -64.7856,-63.964 -64.7884,-63.964 -64.7912,-63.964 -64.794,-63.9743 -64.794,-63.9846 -64.794,-63.994899999999994 -64.794,-64.0052 -64.794,-64.0155 -64.794,-64.02579999999999 -64.794,-64.03609999999999 -64.794,-64.04639999999999 -64.794,-64.05669999999999 -64.794,-64.067 -64.794,-64.067 -64.7912,-64.067 -64.7884,-64.067 -64.7856,-64.067 -64.7828,-64.067 -64.78,-64.067 -64.77720000000001,-64.067 -64.7744,-64.067 -64.7716,-64.067 -64.7688,-64.067 -64.766))"], "date_created": "Fri, 03 Jan 2025 00:00:00 GMT", "description": "B. Antarctica collection site coordinates for NSFGEO-NERC #1850988 - Summer 2023/2024 field season", "east": -63.964, "geometry": ["POINT(-64.0155 -64.78)"], "keywords": "Antarctica; Cryosphere", "locations": "Antarctica", "north": -64.766, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Sousa Lima, Cleverson; Michel, Andrew; Hayward, Scott; Teets, Nicholas", "project_titles": "NSFGEO-NERC: Mechanisms of Adaptation to Terrestrial Antarctica through Comparative Physiology and Genomics of Antarctic and sub-Antarctic Insects", "projects": [{"proj_uid": "p0010203", "repository": "USAP-DC", "title": "NSFGEO-NERC: Mechanisms of Adaptation to Terrestrial Antarctica through Comparative Physiology and Genomics of Antarctic and sub-Antarctic Insects"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.794, "title": "Belgica antarctica collection sites - Summer 2023/2024 field season", "uid": "601875", "west": -64.067}, {"awards": "1850988 Teets, Nicholas", "bounds_geometry": ["POLYGON((-64.067 -64.766,-64.05669999999999 -64.766,-64.04639999999999 -64.766,-64.03609999999999 -64.766,-64.02579999999999 -64.766,-64.0155 -64.766,-64.0052 -64.766,-63.994899999999994 -64.766,-63.9846 -64.766,-63.9743 -64.766,-63.964 -64.766,-63.964 -64.7688,-63.964 -64.7716,-63.964 -64.7744,-63.964 -64.77720000000001,-63.964 -64.78,-63.964 -64.7828,-63.964 -64.7856,-63.964 -64.7884,-63.964 -64.7912,-63.964 -64.794,-63.9743 -64.794,-63.9846 -64.794,-63.994899999999994 -64.794,-64.0052 -64.794,-64.0155 -64.794,-64.02579999999999 -64.794,-64.03609999999999 -64.794,-64.04639999999999 -64.794,-64.05669999999999 -64.794,-64.067 -64.794,-64.067 -64.7912,-64.067 -64.7884,-64.067 -64.7856,-64.067 -64.7828,-64.067 -64.78,-64.067 -64.77720000000001,-64.067 -64.7744,-64.067 -64.7716,-64.067 -64.7688,-64.067 -64.766))"], "date_created": "Fri, 03 Jan 2025 00:00:00 GMT", "description": "Environmental conditions are the major drivers of species distribution, and terrestrial Antarctica arguably presents the most dramatic challenges for its inhabitants. Many animals rely on acclimation to enhance their stress tolerance to face unfavorable conditions. Some animals can also rely on their phenotypic plasticity to respond to these unfavorable conditions without the need to slowly experience increasing levels of stress to enhance their stress tolerance (i.e., acclimate). Belgica antarctica can rely on both types of strategies, but since they evolved to live in a habitat with such dramatic environmental changes as Antarctica, they are very sensitive to any type of stress (e.g., a sudden drop in temperature, or a bout of high-speed wind). Studying the extent to which B. antarctica rely on each of these strategies to survive and how environmental variation can shape this species\u2019 biology across distinct populations (i.e., that might experience distinct selective pressures) is important to help us better understand how polyextremophiles adapt and evolve while inhabiting extreme environments. This project focused on studying freeze tolerance in B. antarctica populations populations within Cormorant Island that inhabited three distinct microhabitats over the course of the summer season (January-March).", "east": -63.964, "geometry": ["POINT(-64.0155 -64.78)"], "keywords": "Antarctica; Belgica Antarctica; Cryosphere; Soil Temperature; Temperature", "locations": "Antarctica", "north": -64.766, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Sousa Lima, Cleverson; Michel, Andrew; Hayward, Scott; Teets, Nicholas; Lima, Cleverson de Sousa", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -64.794, "title": "The effects of microhabitat temperature in phenotypic variation across B. antarctica populations", "uid": "601874", "west": -64.067}, {"awards": "1850988 Teets, Nicholas", "bounds_geometry": ["POLYGON((-64.067 -64.766,-64.05669999999999 -64.766,-64.04639999999999 -64.766,-64.03609999999999 -64.766,-64.02579999999999 -64.766,-64.0155 -64.766,-64.0052 -64.766,-63.994899999999994 -64.766,-63.9846 -64.766,-63.9743 -64.766,-63.964 -64.766,-63.964 -64.7688,-63.964 -64.7716,-63.964 -64.7744,-63.964 -64.77720000000001,-63.964 -64.78,-63.964 -64.7828,-63.964 -64.7856,-63.964 -64.7884,-63.964 -64.7912,-63.964 -64.794,-63.9743 -64.794,-63.9846 -64.794,-63.994899999999994 -64.794,-64.0052 -64.794,-64.0155 -64.794,-64.02579999999999 -64.794,-64.03609999999999 -64.794,-64.04639999999999 -64.794,-64.05669999999999 -64.794,-64.067 -64.794,-64.067 -64.7912,-64.067 -64.7884,-64.067 -64.7856,-64.067 -64.7828,-64.067 -64.78,-64.067 -64.77720000000001,-64.067 -64.7744,-64.067 -64.7716,-64.067 -64.7688,-64.067 -64.766))"], "date_created": "Fri, 03 Jan 2025 00:00:00 GMT", "description": "Protective mechanisms that confer protection to one type of environmental stressor can sometimes confer protection to stressors of different natures, which is a physiological response to stress called Cross-tolerance. Cross-tolerance has been shown in organisms of multiple orders, including Dipterans. Belgica antarctica is an extremely resilient animal and is able to withstand many types of stress that can occur both isolated and at the same time. Recently, it has been demonstrated that brief exposure to a modest level of a stressor can improve their tolerance to severe levels of multiple other stressors. This study had the objective of building on these results and investigate how their response to severe stress changes (either improve or reduce tolerance) to a long-term acclimation to modest level of stressors.", "east": -63.964, "geometry": ["POINT(-64.0155 -64.78)"], "keywords": "Antarctica; Belgica Antarctica; Cryosphere", "locations": "Antarctica", "north": -64.766, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Sousa Lima, Cleverson; Michel, Andrew; Hayward, Scott; Colinet, Herve; Teets, Nicholas", "project_titles": "NSFGEO-NERC: Mechanisms of Adaptation to Terrestrial Antarctica through Comparative Physiology and Genomics of Antarctic and sub-Antarctic Insects", "projects": [{"proj_uid": "p0010203", "repository": "USAP-DC", "title": "NSFGEO-NERC: Mechanisms of Adaptation to Terrestrial Antarctica through Comparative Physiology and Genomics of Antarctic and sub-Antarctic Insects"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.794, "title": "Cross-tolerance in Belgica antarctica near Palmer Peninsula", "uid": "601872", "west": -64.067}, {"awards": "1850988 Teets, Nicholas", "bounds_geometry": ["POLYGON((-64.0844 -64.7651,-64.07249 -64.7651,-64.06058 -64.7651,-64.04867 -64.7651,-64.03676 -64.7651,-64.02485 -64.7651,-64.01294 -64.7651,-64.00103 -64.7651,-63.98912 -64.7651,-63.97721 -64.7651,-63.9653 -64.7651,-63.9653 -64.76798000000001,-63.9653 -64.77086,-63.9653 -64.77374,-63.9653 -64.77662,-63.9653 -64.7795,-63.9653 -64.78238,-63.9653 -64.78526,-63.9653 -64.78814,-63.9653 -64.79101999999999,-63.9653 -64.7939,-63.97721 -64.7939,-63.98912 -64.7939,-64.00103 -64.7939,-64.01294 -64.7939,-64.02485 -64.7939,-64.03676 -64.7939,-64.04867 -64.7939,-64.06058 -64.7939,-64.07249 -64.7939,-64.0844 -64.7939,-64.0844 -64.79101999999999,-64.0844 -64.78814,-64.0844 -64.78526,-64.0844 -64.78238,-64.0844 -64.7795,-64.0844 -64.77662,-64.0844 -64.77374,-64.0844 -64.77086,-64.0844 -64.76798000000001,-64.0844 -64.7651))"], "date_created": "Fri, 03 Jan 2025 00:00:00 GMT", "description": "For this study, larvae were collected every week for the entire summer field season from five sites, four located on Cormorant Island and a fifth site on Humble Island. The dataset contains microhabitat data for each site, as well as the metabolic rate, carbohydrate content, lipid content, and protein content of the larvae collected at those sites for each time point.", "east": -63.9653, "geometry": ["POINT(-64.02485 -64.7795)"], "keywords": "Antarctica; Antarctic Peninsula; Cryosphere; Seasonality", "locations": "Antarctica; Antarctic Peninsula", "north": -64.7651, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Teets, Nicholas; Spacht, Drew; Gantz, Josiah D.; Devlin, Jack; McCabe, Eleanor; Lee, Richard; Denlinger, David", "project_titles": "NSFGEO-NERC: Mechanisms of Adaptation to Terrestrial Antarctica through Comparative Physiology and Genomics of Antarctic and sub-Antarctic Insects", "projects": [{"proj_uid": "p0010203", "repository": "USAP-DC", "title": "NSFGEO-NERC: Mechanisms of Adaptation to Terrestrial Antarctica through Comparative Physiology and Genomics of Antarctic and sub-Antarctic Insects"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.7939, "title": "Fine\u2011scale variation in microhabitat conditions influences physiology and metabolism in an Antarctic insect", "uid": "601865", "west": -64.0844}, {"awards": "1745130 Moran, Amy", "bounds_geometry": ["POLYGON((166 -77,166.08 -77,166.16 -77,166.24 -77,166.32 -77,166.4 -77,166.48000000000002 -77,166.56 -77,166.64000000000001 -77,166.72 -77,166.8 -77,166.8 -77.09,166.8 -77.18,166.8 -77.27,166.8 -77.36,166.8 -77.45,166.8 -77.54,166.8 -77.63000000000001,166.8 -77.72,166.8 -77.81,166.8 -77.9,166.72 -77.9,166.64000000000001 -77.9,166.56 -77.9,166.48000000000002 -77.9,166.4 -77.9,166.32 -77.9,166.24 -77.9,166.16 -77.9,166.08 -77.9,166 -77.9,166 -77.81,166 -77.72,166 -77.63000000000001,166 -77.54,166 -77.45,166 -77.36,166 -77.27,166 -77.18,166 -77.09,166 -77))"], "date_created": "Thu, 02 Jan 2025 00:00:00 GMT", "description": "Temperature and conductivity measurements collected from Hobo loggers deployed ~3cm from the benthos at six sites around McMurdo Sound in 2021-2022 at depths of 20-30 m. ", "east": 166.8, "geometry": ["POINT(166.4 -77.45)"], "keywords": "Antarctica; Cryosphere; McMurdo Sound; Salinity; Temperature", "locations": "Antarctica; McMurdo Sound", "north": -77.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Moran, Amy", "project_titles": "Thermal Sensitivity of Antarctic Embryos and Larvae: Effects of Temperature on Metabolism, Developmental Rate, and the Metabolic Cost of Development ", "projects": [{"proj_uid": "p0010187", "repository": "USAP-DC", "title": "Thermal Sensitivity of Antarctic Embryos and Larvae: Effects of Temperature on Metabolism, Developmental Rate, and the Metabolic Cost of Development "}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.9, "title": "Benthic seawater temperature and conductivity measurements at six sites in McMurdo Sound", "uid": "601870", "west": 166.0}, {"awards": "1744993 Higgins, John; 1443306 Mayewski, Paul; 0838843 Kurbatov, Andrei; 1745007 Mayewski, Paul; 1744832 Severinghaus, Jeffrey; 2019719 Brook, Edward; 1745006 Brook, Edward J.", "bounds_geometry": null, "date_created": "Mon, 16 Dec 2024 00:00:00 GMT", "description": "This project aimed to reconstruct paleoclimate conditions from old Antarctic ice using stable water isotope analysis. Through multi-year, multi-institutional collaboration, data from several sites have been analyzed. These findings will contribute to several studies, advancing our understanding of Earth\u0027s past climate and long-term climate changes.", "east": null, "geometry": null, "keywords": "Allan Hills; Antarctica; Cryosphere; Isotope Data", "locations": "Allan Hills; Antarctica", "north": null, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology", "persons": "Kurbatov, Andrei V.; Mayewski, Paul A.; Introne, Douglas; Severinghaus, Jeffrey P.; Higgins, John; Brook, Edward", "project_titles": "Center for Oldest Ice Exploration; Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area", "projects": [{"proj_uid": "p0010321", "repository": "USAP-DC", "title": "Center for Oldest Ice Exploration"}, {"proj_uid": "p0000760", "repository": "USAP-DC", "title": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills; COLDEX", "south": null, "title": "Allan Hills ice water stable isotope record for dD, d18O", "uid": "601863", "west": null}, {"awards": "2147045 Learman, Deric", "bounds_geometry": null, "date_created": "Mon, 16 Dec 2024 00:00:00 GMT", "description": "Shelf sediment samples were collected in Eastern Antarctica with the mega corer in 2023 (April). The sample locations and water depths are recorded in this dataset. These samples were used to collect data on organic matter (total organic carbon, total nitrogen, delta 13C (organic), delta 15N, and C to N ratios). Nutrient data (nitrate, nitrite, sulfate, and ammonia) and grain size analysis were collected on a subsample set.", "east": null, "geometry": null, "keywords": "Antarctica; Cryosphere", "locations": "Antarctica", "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Learman, Deric", "project_titles": "Collaborative Research: ANT LIA: Connecting Metagenome Potential to Microbial Function: Investigating Microbial Degradation of Complex Organic Matter Antarctic Benthic Sediments", "projects": [{"proj_uid": "p0010373", "repository": "USAP-DC", "title": "Collaborative Research: ANT LIA: Connecting Metagenome Potential to Microbial Function: Investigating Microbial Degradation of Complex Organic Matter Antarctic Benthic Sediments"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Physical and geochemical data from shelf sediments eastern Antarctica", "uid": "601876", "west": null}, {"awards": "1850988 Teets, Nicholas", "bounds_geometry": ["POLYGON((-65.6867 -64.7256,-65.52717 -64.7256,-65.36764 -64.7256,-65.20811 -64.7256,-65.04858 -64.7256,-64.88905 -64.7256,-64.72952 -64.7256,-64.56998999999999 -64.7256,-64.41046 -64.7256,-64.25093 -64.7256,-64.0914 -64.7256,-64.0914 -64.86576,-64.0914 -65.00592,-64.0914 -65.14608,-64.0914 -65.28624,-64.0914 -65.4264,-64.0914 -65.56656,-64.0914 -65.70672,-64.0914 -65.84688,-64.0914 -65.98704000000001,-64.0914 -66.1272,-64.25093 -66.1272,-64.41046 -66.1272,-64.56998999999999 -66.1272,-64.72952 -66.1272,-64.88905 -66.1272,-65.04858 -66.1272,-65.20811 -66.1272,-65.36764 -66.1272,-65.52717 -66.1272,-65.6867 -66.1272,-65.6867 -65.98704000000001,-65.6867 -65.84688,-65.6867 -65.70672,-65.6867 -65.56656,-65.6867 -65.4264,-65.6867 -65.28624,-65.6867 -65.14608,-65.6867 -65.00592,-65.6867 -64.86576,-65.6867 -64.7256))"], "date_created": "Mon, 16 Dec 2024 00:00:00 GMT", "description": "In this study, we measured cold and dehydration tolerance of larvae of Belgica antarctica from three distinct geographic locations along the Antarctic Peninsula. Larvae were collected from Cape Rasmussen, Cape Evensen, and Dream Island, after which they were returned to the US for experiments. For cold tolerance, larvae were exposed to -14 or -15\u00b0C for 24 h, and survival was assessed 24 later. For dehydration tolerance, larvae were exposed to 75% RH for 72 h, and survival was checked after 24 h of rehydration. The dataset reports the numbers of live and dead larvae from each island and experimental conditions. Larvae were tested in groups of 10.", "east": -64.0914, "geometry": ["POINT(-64.88905 -65.4264)"], "keywords": "Antarctica; Antarctic Peninsula; Cryosphere", "locations": "Antarctic Peninsula; Antarctica", "north": -64.7256, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Teets, Nicholas; Kawarasaki, Yuta", "project_titles": "NSFGEO-NERC: Mechanisms of Adaptation to Terrestrial Antarctica through Comparative Physiology and Genomics of Antarctic and sub-Antarctic Insects", "projects": [{"proj_uid": "p0010203", "repository": "USAP-DC", "title": "NSFGEO-NERC: Mechanisms of Adaptation to Terrestrial Antarctica through Comparative Physiology and Genomics of Antarctic and sub-Antarctic Insects"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -66.1272, "title": "Cold and dehydration tolerance of Belgica antarctica from three distinct geographic locations", "uid": "601864", "west": -65.6867}, {"awards": "2149518 Fudge, Tyler; 2019719 Brook, Edward", "bounds_geometry": ["POINT(159.36 -76.73)"], "date_created": "Fri, 06 Dec 2024 00:00:00 GMT", "description": "This dataset includes three-dimensional multitrack electrical conductivity measurements (3D ECM) results from measurements in the upper sections of the ALHIC2201 and ALHIC2302 large (241mm) diameter ice cores drilled in the Allan Hills blue ice area (76.73\u00b0S,159.36\u00b0E) in Victoria Land, East Antarctica. The data extends from the surface to 23.0 m depth in ALHIC2201 and from 8.5 m to 46.3 m depth in ALHIC2302. We include the raw 3D ECM data (AC and DC multitrack ECM measurements on perpendicular faces of a quarter-core cut) in CSV format and basic plots of this data. We also provide dip and dip direction estimates of the layering observed in each core section in a CSV table.", "east": 159.36, "geometry": ["POINT(159.36 -76.73)"], "keywords": "Allan Hills; Antarctica; Cryosphere", "locations": "Allan Hills; Antarctica", "north": -76.73, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Kirkpatrick, Liam; Carter, Austin; Marks Peterson, Julia; Shackleton, Sarah; Fudge, T. J.", "project_titles": "Center for Oldest Ice Exploration; Collaborative Research: Testing Next Generation Measurement Techniques for Reconstruction of Paleoclimate Archives from Thin or Disturbed Ice Cores Sections", "projects": [{"proj_uid": "p0010321", "repository": "USAP-DC", "title": "Center for Oldest Ice Exploration"}, {"proj_uid": "p0010365", "repository": "USAP-DC", "title": "Collaborative Research: Testing Next Generation Measurement Techniques for Reconstruction of Paleoclimate Archives from Thin or Disturbed Ice Cores Sections"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "COLDEX", "south": -76.73, "title": "ALHIC2201 and ALHIC2302 3D ECM and Layer Orientations", "uid": "601854", "west": 159.36}, {"awards": "2148517 Hancock, Cathrine; AWI_PS129_01 TBD", "bounds_geometry": ["POLYGON((-34 -72,-32.4 -72,-30.8 -72,-29.2 -72,-27.6 -72,-26 -72,-24.4 -72,-22.799999999999997 -72,-21.2 -72,-19.6 -72,-18 -72,-18 -72.4,-18 -72.8,-18 -73.2,-18 -73.6,-18 -74,-18 -74.4,-18 -74.8,-18 -75.2,-18 -75.6,-18 -76,-19.6 -76,-21.2 -76,-22.8 -76,-24.4 -76,-26 -76,-27.6 -76,-29.200000000000003 -76,-30.8 -76,-32.4 -76,-34 -76,-34 -75.6,-34 -75.2,-34 -74.8,-34 -74.4,-34 -74,-34 -73.6,-34 -73.2,-34 -72.8,-34 -72.4,-34 -72))"], "date_created": "Tue, 26 Nov 2024 00:00:00 GMT", "description": "Trajectory data for APEX floats 9223 and 9224 along Dronning Maud Land and Coats Land in the southern Weddell Sea from Mar 2022 - Feb 2023. The APEX floats were deployed during the Hybrid Antarctic Float Observing System (HAFOS) in the Weddell Sea on expedition PS129 with POLARSTERN. The attached archive contains trajectory data obtained through acoustic tracking using artoa4argo V4.355 (temporal sampling interval: daily).", "east": -18.0, "geometry": ["POINT(-26 -74)"], "keywords": "Antarctica; Continental Slope; Cryosphere; Eddy; Float Trajectory; HAFOS; Weddell Sea", "locations": "Weddell Sea; Antarctica", "north": -72.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Hancock, Cathrine; Boebel, Olaf", "project_titles": "Weddell Gyre Mean Circulation and Eddy Statistics from Floats", "projects": [{"proj_uid": "p0010310", "repository": "USAP-DC", "title": "Weddell Gyre Mean Circulation and Eddy Statistics from Floats"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -76.0, "title": "Trajectories for APEX floats 9223 and 9224 from acoustic tracking using artoa4argo, Mar 2022-Feb 2023", "uid": "601852", "west": -34.0}, {"awards": "1738989 Venturelli, Ryan", "bounds_geometry": ["POLYGON((-104.9429 -75.1543,-104.92228999999999 -75.1543,-104.90168 -75.1543,-104.88107 -75.1543,-104.86046 -75.1543,-104.83985 -75.1543,-104.81924 -75.1543,-104.79863 -75.1543,-104.77802 -75.1543,-104.75741000000001 -75.1543,-104.7368 -75.1543,-104.7368 -75.16263000000001,-104.7368 -75.17096000000001,-104.7368 -75.17929000000001,-104.7368 -75.18762000000001,-104.7368 -75.19595000000001,-104.7368 -75.20428,-104.7368 -75.21261,-104.7368 -75.22094,-104.7368 -75.22927,-104.7368 -75.2376,-104.75741000000001 -75.2376,-104.77802 -75.2376,-104.79863 -75.2376,-104.81924 -75.2376,-104.83985 -75.2376,-104.86046 -75.2376,-104.88107 -75.2376,-104.90168 -75.2376,-104.92228999999999 -75.2376,-104.9429 -75.2376,-104.9429 -75.22927,-104.9429 -75.22094,-104.9429 -75.21261,-104.9429 -75.20428,-104.9429 -75.19595000000001,-104.9429 -75.18762000000001,-104.9429 -75.17929000000001,-104.9429 -75.17096000000001,-104.9429 -75.16263000000001,-104.9429 -75.1543))"], "date_created": "Mon, 25 Nov 2024 00:00:00 GMT", "description": "Contains ice-penetrating radar data (10 and 400 MHz) from the Thwaites Glacier grounding zone. The main purpose of collecting these data was for safety assessment at a camp put-in; deep (10 MHz) radar data were also collected opportunistically.", "east": -104.7368, "geometry": ["POINT(-104.83985 -75.19595000000001)"], "keywords": "Antarctica; Cryosphere; Grounding Zone; Ice Penetrating Radar; Thwaites Glacier", "locations": "Antarctica; Thwaites Glacier", "north": -75.1543, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Balco, Greg; Campbell, Seth; Goehring, Brent", "project_titles": "NSF-NERC: Geological History Constraints on the Magnitude of Grounding Line Retreat in the Thwaites Glacier System", "projects": [{"proj_uid": "p0010165", "repository": "USAP-DC", "title": "NSF-NERC: Geological History Constraints on the Magnitude of Grounding Line Retreat in the Thwaites Glacier System"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -75.2376, "title": "Ice-penetrating radar data from the Thwaites Glacier grounding zone", "uid": "601860", "west": -104.9429}, {"awards": "1851022 Fudge, Tyler", "bounds_geometry": null, "date_created": "Fri, 22 Nov 2024 00:00:00 GMT", "description": "", "east": null, "geometry": null, "keywords": "Antarctica; Cryosphere", "locations": "Antarctica", "north": null, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Fudge, T. J.", "project_titles": "Collaborative Research: The Impact of Impurities and Stress State on Polycrystalline Ice Deformation", "projects": [{"proj_uid": "p0010211", "repository": "USAP-DC", "title": "Collaborative Research: The Impact of Impurities and Stress State on Polycrystalline Ice Deformation"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Forward Diffusion Model used to calculate widening of volcanic layer widths", "uid": "601857", "west": null}, {"awards": "1851022 Fudge, Tyler", "bounds_geometry": null, "date_created": "Fri, 22 Nov 2024 00:00:00 GMT", "description": "This data set is code and necessary files for calculating the mean scaled gradient as described in Fudge et al., 2024. The code is in Matlab and will reproduce Figure 4.", "east": null, "geometry": null, "keywords": "Antarctica; Cryosphere", "locations": "Antarctica", "north": null, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Fudge, T. J.", "project_titles": "Collaborative Research: The Impact of Impurities and Stress State on Polycrystalline Ice Deformation", "projects": [{"proj_uid": "p0010211", "repository": "USAP-DC", "title": "Collaborative Research: The Impact of Impurities and Stress State on Polycrystalline Ice Deformation"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Code for calculating mean gradient for EDC sulfate data", "uid": "601856", "west": null}, {"awards": "1851022 Fudge, Tyler", "bounds_geometry": ["POINT(123.35 -75.1)"], "date_created": "Fri, 22 Nov 2024 00:00:00 GMT", "description": "This data sets contains the width of volcanic events as identified in the Dome C ice core and described in Fudge et al., 2024", "east": 123.35, "geometry": ["POINT(123.35 -75.1)"], "keywords": "Antarctica; Cryosphere", "locations": "Antarctica", "north": -75.1, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Fudge, T. J.", "project_titles": "Collaborative Research: The Impact of Impurities and Stress State on Polycrystalline Ice Deformation", "projects": [{"proj_uid": "p0010211", "repository": "USAP-DC", "title": "Collaborative Research: The Impact of Impurities and Stress State on Polycrystalline Ice Deformation"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -75.1, "title": "Volcanic Widths in Dome C Interglacials and Glacials", "uid": "601855", "west": 123.35}, {"awards": "1443105 Steig, Eric; 1141839 Steig, Eric; 1443336 Osterberg, Erich; 1443397 Kreutz, Karl; 1443663 Cole-Dai, Jihong", "bounds_geometry": ["POINT(-99 -90)"], "date_created": "Wed, 20 Nov 2024 00:00:00 GMT", "description": "This dataset includes all major ion chemistry data from the South Pole Ice Core as well as sea salt sodium data resampled at annual resolution. The development of this dataset is discussed in Winski et al. 2021. The chloride, nitrate, sulfate, magnesium and calcium data have not yet been published, nor has any data prior to the Holocene. Please contact the dataset authors if you have questions.", "east": -99.0, "geometry": ["POINT(-99 -90)"], "keywords": "Antarctica; Cryosphere; Glaciology; Ice Core; Ice Core Chemistry; Ice Core Records; Major Ion; Sea Ice; Sea Salt; Sodium; South Pole; SPICEcore", "locations": "South Pole; Antarctica", "north": -90.0, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology", "persons": "Winski, Dominic A.", "project_titles": "Collaborative Research: A 1500m Ice Core from South Pole; Collaborative Research: Record of the Triple-oxygen Isotope and Hydrogen Isotope Composition of Ice from an Ice Core at South Pole; Collaborative Research: South Pole Ice Core Chronology and Climate Records using Chemical and Microparticle Measurements", "projects": [{"proj_uid": "p0010060", "repository": "USAP-DC", "title": "Collaborative Research: A 1500m Ice Core from South Pole"}, {"proj_uid": "p0010065", "repository": "USAP-DC", "title": "Collaborative Research: Record of the Triple-oxygen Isotope and Hydrogen Isotope Composition of Ice from an Ice Core at South Pole"}, {"proj_uid": "p0010051", "repository": "USAP-DC", "title": "Collaborative Research: South Pole Ice Core Chronology and Climate Records using Chemical and Microparticle Measurements"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -90.0, "title": "South Pole Ice Core Sea Salt and Major Ions", "uid": "601851", "west": -99.0}, {"awards": "1947562 van Gestel, Natasja", "bounds_geometry": ["POLYGON((-64.0898264 -64.7704833,-64.08444765 -64.7704833,-64.07906890000001 -64.7704833,-64.07369015 -64.7704833,-64.0683114 -64.7704833,-64.06293265 -64.7704833,-64.0575539 -64.7704833,-64.05217515 -64.7704833,-64.04679639999999 -64.7704833,-64.04141765 -64.7704833,-64.0360389 -64.7704833,-64.0360389 -64.77082025,-64.0360389 -64.77115719999999,-64.0360389 -64.77149415,-64.0360389 -64.7718311,-64.0360389 -64.77216805,-64.0360389 -64.772505,-64.0360389 -64.77284195,-64.0360389 -64.7731789,-64.0360389 -64.77351585,-64.0360389 -64.7738528,-64.04141765 -64.7738528,-64.04679639999999 -64.7738528,-64.05217515 -64.7738528,-64.0575539 -64.7738528,-64.06293265 -64.7738528,-64.0683114 -64.7738528,-64.07369015 -64.7738528,-64.07906890000001 -64.7738528,-64.08444765 -64.7738528,-64.0898264 -64.7738528,-64.0898264 -64.77351585,-64.0898264 -64.7731789,-64.0898264 -64.77284195,-64.0898264 -64.772505,-64.0898264 -64.77216805,-64.0898264 -64.7718311,-64.0898264 -64.77149415,-64.0898264 -64.77115719999999,-64.0898264 -64.77082025,-64.0898264 -64.7704833))"], "date_created": "Mon, 18 Nov 2024 00:00:00 GMT", "description": "This data set contains the raw data for measurements of carbon fluxes at four field sites along a successional gradient near Palmer Station, Antarctica. At the beginning of the experiment, field site 1 (youngest site, closest to the glacier) was approximately 2 years since deglaciation, field site 2 about 30 years since deglaciation, field site 3 about 60 years since deglaciation, and Litchfield Island: hundreds of years since deglaciation. These sites have each: 5 control plots and 5 warmed plots (warmed via open-top chambers, OTC). Carbon flux measurements were taken weekly at most sites (40 plots total). A custom chamber connected to a LI-COR 6800 was placed on a stainless steel ring. Then measurements were taken over a 90 second or 120 second interval. Measurements were taken with a transparent chamber to obtain net ecosystem exchange (NEE; micromols CO2/m2/s), and then covered with dark cloth to obtain ecosystem respiration (ER) measurements. The incoming carbon fluxes was then obtained based on the NEE and ER.", "east": -64.0360389, "geometry": ["POINT(-64.06293265 -64.77216805)"], "keywords": "Antarctica; CO2; Cryosphere; Field Investigations; Palmer Station", "locations": "Palmer Station; Antarctica", "north": -64.7704833, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "van Gestel, Natasja", "project_titles": "Antarctica as a Model System for Responses of Terrestrial Carbon Balance to Warming", "projects": [{"proj_uid": "p0010251", "repository": "USAP-DC", "title": "Antarctica as a Model System for Responses of Terrestrial Carbon Balance to Warming"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.7738528, "title": "2022-2023 Palmer Station terrestrial carbon fluxes - field warming experiment", "uid": "601853", "west": -64.0898264}, {"awards": "1443336 Osterberg, Erich; 1443397 Kreutz, Karl; 1443663 Cole-Dai, Jihong; 1443105 Steig, Eric; 1141839 Steig, Eric", "bounds_geometry": ["POINT(-89.16 -89.99)"], "date_created": "Mon, 18 Nov 2024 00:00:00 GMT", "description": "This dataset includes major ion and seasonal sea salt chemistry data from the South Pole Ice Core. Included are the raw major ion data, annually resolved mean, maximum and minimum sea salt sodium concentrations and centennially resolved principal components (discussed in Winski et al. (2021).", "east": -89.16, "geometry": ["POINT(-89.16 -89.99)"], "keywords": "Antarctica; Cryosphere; Glaciology; Ice Core; Ice Core Chemistry; Ice Core Records; Major Ion; Sea Ice; Sea Salt; Sodium; South Pole; SPICEcore", "locations": "Antarctica; South Pole", "north": -89.99, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology", "persons": "Winski, Dominic A.", "project_titles": "Collaborative Research: A 1500m Ice Core from South Pole; Collaborative Research: Record of the Triple-oxygen Isotope and Hydrogen Isotope Composition of Ice from an Ice Core at South Pole; Collaborative Research: South Pole Ice Core Chronology and Climate Records using Chemical and Microparticle Measurements", "projects": [{"proj_uid": "p0010065", "repository": "USAP-DC", "title": "Collaborative Research: Record of the Triple-oxygen Isotope and Hydrogen Isotope Composition of Ice from an Ice Core at South Pole"}, {"proj_uid": "p0010051", "repository": "USAP-DC", "title": "Collaborative Research: South Pole Ice Core Chronology and Climate Records using Chemical and Microparticle Measurements"}, {"proj_uid": "p0010060", "repository": "USAP-DC", "title": "Collaborative Research: A 1500m Ice Core from South Pole"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -89.99, "title": "South Pole Ice Core Holocene Major Ion Dataset", "uid": "601850", "west": -89.16}, {"awards": "1738989 Venturelli, Ryan", "bounds_geometry": ["POLYGON((-110.9665 -75.1967,-110.92041 -75.1967,-110.87432 -75.1967,-110.82822999999999 -75.1967,-110.78214 -75.1967,-110.73605 -75.1967,-110.68996 -75.1967,-110.64386999999999 -75.1967,-110.59778 -75.1967,-110.55169000000001 -75.1967,-110.5056 -75.1967,-110.5056 -75.20331,-110.5056 -75.20992000000001,-110.5056 -75.21653,-110.5056 -75.22314,-110.5056 -75.22975,-110.5056 -75.23636,-110.5056 -75.24297,-110.5056 -75.24958,-110.5056 -75.25619,-110.5056 -75.2628,-110.55169000000001 -75.2628,-110.59778 -75.2628,-110.64386999999999 -75.2628,-110.68996 -75.2628,-110.73605 -75.2628,-110.78214 -75.2628,-110.82822999999999 -75.2628,-110.87432 -75.2628,-110.92041 -75.2628,-110.9665 -75.2628,-110.9665 -75.25619,-110.9665 -75.24958,-110.9665 -75.24297,-110.9665 -75.23636,-110.9665 -75.22975,-110.9665 -75.22314,-110.9665 -75.21653,-110.9665 -75.20992000000001,-110.9665 -75.20331,-110.9665 -75.1967))"], "date_created": "Wed, 13 Nov 2024 00:00:00 GMT", "description": "Contains ice-penetrating radar data (10, 100, and 400 MHz) from the north side of the Mt. Murphy massif. Most of these data are closely spaced lines used for reconnaissance and site selection for a subglacial bedrock recovery drilling project very close to the ice margin at the north ridge of Kay Peak, a sub-peak of the massif. In addition, there are several longer exploratory lines that cross the embayment between the massif and the Crosson Ice Shelf, some of which may cross grounding lines. ", "east": -110.5056, "geometry": ["POINT(-110.73605 -75.22975)"], "keywords": "Antarctica; Cryosphere; Mount Murphy", "locations": "Antarctica; Mount Murphy", "north": -75.1967, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Balco, Greg; Campbell, Seth; Goehring, Brent", "project_titles": "NSF-NERC: Geological History Constraints on the Magnitude of Grounding Line Retreat in the Thwaites Glacier System", "projects": [{"proj_uid": "p0010165", "repository": "USAP-DC", "title": "NSF-NERC: Geological History Constraints on the Magnitude of Grounding Line Retreat in the Thwaites Glacier System"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -75.2628, "title": "Ice-penetrating radar data from the northern embayment of the Mt. Murphy massif", "uid": "601834", "west": -110.9665}, {"awards": "1841228 Lyons, W. Berry", "bounds_geometry": ["POLYGON((163.38627 -77.56133,163.39875899999998 -77.56133,163.411248 -77.56133,163.423737 -77.56133,163.436226 -77.56133,163.448715 -77.56133,163.46120399999998 -77.56133,163.473693 -77.56133,163.48618199999999 -77.56133,163.498671 -77.56133,163.51116 -77.56133,163.51116 -77.564889,163.51116 -77.568448,163.51116 -77.572007,163.51116 -77.575566,163.51116 -77.579125,163.51116 -77.582684,163.51116 -77.586243,163.51116 -77.58980199999999,163.51116 -77.593361,163.51116 -77.59692,163.498671 -77.59692,163.48618199999999 -77.59692,163.473693 -77.59692,163.46120399999998 -77.59692,163.448715 -77.59692,163.436226 -77.59692,163.423737 -77.59692,163.411248 -77.59692,163.39875899999998 -77.59692,163.38627 -77.59692,163.38627 -77.593361,163.38627 -77.58980199999999,163.38627 -77.586243,163.38627 -77.582684,163.38627 -77.579125,163.38627 -77.575566,163.38627 -77.572007,163.38627 -77.568448,163.38627 -77.564889,163.38627 -77.56133))"], "date_created": "Mon, 28 Oct 2024 00:00:00 GMT", "description": "This dataset includes the stable isotope signature of massive buried ice, eastern Taylor Valley, Antarctica collected during the austral summer season of 2019-2020", "east": 163.51116, "geometry": ["POINT(163.448715 -77.579125)"], "keywords": "Antarctica; Buried Ice; Cryosphere; Stable Isotopes; Stable Water Isotopes; Taylor Valley", "locations": "Taylor Valley; Antarctica", "north": -77.56133, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Gardner, Christopher B.", "project_titles": "Fe Behavior and Bioavailability in Sub-aerial Runoff into the Ross Sea", "projects": [{"proj_uid": "p0010483", "repository": "USAP-DC", "title": "Fe Behavior and Bioavailability in Sub-aerial Runoff into the Ross Sea"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.59692, "title": "Isotopic signature of massive buried ice, eastern Taylor Valley, Antarctica", "uid": "601848", "west": 163.38627}, {"awards": "1841228 Lyons, W. Berry", "bounds_geometry": ["POINT(163.5074 -77.5789)"], "date_created": "Mon, 28 Oct 2024 00:00:00 GMT", "description": "This dataset includes aqueous chemistry of water from the hyporheic zone in Wales Stream, Taylor Valley, Antarctica, just upstream from New Harbor Camp. Data includes major ions, nutrients, trace elements, stable iron isotopes, and stable isotopes of water.", "east": 163.5074, "geometry": ["POINT(163.5074 -77.5789)"], "keywords": "Antarctica; Cryosphere; Nutrients; Stable Isotopes; Taylor Valley; Trace Elements", "locations": "Antarctica; Taylor Valley", "north": -77.5789, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Gardner, Christopher B.", "project_titles": "Fe Behavior and Bioavailability in Sub-aerial Runoff into the Ross Sea", "projects": [{"proj_uid": "p0010483", "repository": "USAP-DC", "title": "Fe Behavior and Bioavailability in Sub-aerial Runoff into the Ross Sea"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.5789, "title": "Hyporheic zone geochemistry of Wales Stream, Taylor Valley, Antarctica", "uid": "601847", "west": 163.5074}, {"awards": "1643669 Petrenko, Vasilii", "bounds_geometry": ["POLYGON((112 -66,112.2 -66,112.4 -66,112.6 -66,112.8 -66,113 -66,113.2 -66,113.4 -66,113.6 -66,113.8 -66,114 -66,114 -66.1,114 -66.2,114 -66.3,114 -66.4,114 -66.5,114 -66.6,114 -66.7,114 -66.8,114 -66.9,114 -67,113.8 -67,113.6 -67,113.4 -67,113.2 -67,113 -67,112.8 -67,112.6 -67,112.4 -67,112.2 -67,112 -67,112 -66.9,112 -66.8,112 -66.7,112 -66.6,112 -66.5,112 -66.4,112 -66.3,112 -66.2,112 -66.1,112 -66))"], "date_created": "Thu, 24 Oct 2024 00:00:00 GMT", "description": "This is a data set containing measurements of [14CO] in firn air and ice core samples from Law Dome DE08-OH site, Antarctica. The firn air and ice core samples were collected at Law Dome in December 2018 and January 2019. The [14CO] data represent atmospheric values (with the in situ cosmogenic and procedural components removed). [14CO] measurements were conducted as described in Hmiel et al., 2024 (https://doi.org/10.5194/tc-18-3363-2024). The in situ cosmogenic [14CO] contribution was calculated using parameters and model also described in Hmiel et al. (2024). As [14CO] measurements in ice cores are complex, use of the data in a publication requires contacting Vasilii Petrenko (vasilii.petrenko@rochester.edu) to ensure correct understanding of the data. Depending on nature of use of the data, co-authorship may be appropriate. ", "east": 114.0, "geometry": ["POINT(113 -66.5)"], "keywords": "Antarctica; Carbon-14; Cryosphere; Firn Air; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core; Ice Core Records; Law Dome; Snow/ice; Snow/Ice", "locations": "Antarctica; Law Dome", "north": -66.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Petrenko, Vasilii", "project_titles": "Collaborative Research: Reconstructing Carbon-14 of Atmospheric Carbon Monoxide from Law Dome, Antarctica to Constrain Long-Term Hydroxyl Radical Variability", "projects": [{"proj_uid": "p0010341", "repository": "USAP-DC", "title": "Collaborative Research: Reconstructing Carbon-14 of Atmospheric Carbon Monoxide from Law Dome, Antarctica to Constrain Long-Term Hydroxyl Radical Variability"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -67.0, "title": "Law Dome firn air and ice core 14CO concentration", "uid": "601846", "west": 112.0}, {"awards": "1143836 Leventer, Amy", "bounds_geometry": ["POLYGON((117 -66,119.9 -66,122.8 -66,125.7 -66,128.6 -66,131.5 -66,134.4 -66,137.3 -66,140.2 -66,143.1 -66,146 -66,146 -66.1,146 -66.2,146 -66.3,146 -66.4,146 -66.5,146 -66.6,146 -66.7,146 -66.8,146 -66.9,146 -67,143.1 -67,140.2 -67,137.3 -67,134.4 -67,131.5 -67,128.6 -67,125.7 -67,122.8 -67,119.9 -67,117 -67,117 -66.9,117 -66.8,117 -66.7,117 -66.6,117 -66.5,117 -66.4,117 -66.3,117 -66.2,117 -66.1,117 -66))"], "date_created": "Mon, 21 Oct 2024 00:00:00 GMT", "description": "Totten Glacier is the termination of the largest marine-based portion of the East Antarctic Ice Sheet, the Aurora Subglacial Basin. Yet little is known about the glacial evolution of the catchment and the factors influencing its present and past behavior. Due its remote location and heavy sea ice, the continental shelf in front of the Totten Glacier had not been comprehensively surveyed prior to this study. Satellite observations indicate that the Totten ice drainage system is thinning, and it has been hypothesized that this thinning is in response to undermelting by warm ocean waters over the continental shelf. While this process is observed elsewhere in Antarctica (e.g. the rapidly retreating Pine Island Glacier in West Antarctica), the Totten Glacier system is potentially Antarcticas most important glacial drainage system due to its large size; it is three times larger than any system in West Antarctica. \u003c/br\u003eThe main goals of this proposal were: \u003c/br\u003eTo generate multibeam bathymetric maps of the continental shelf proximal to the Totten Glacier system to understand the recent regional glacial history and to document the pathways, if any, for circumpolar deep water to move onto the shelf. \u003c/br\u003eTo conduct a physical oceanographic survey of the region proximal to the Totten Glacier system, to determine the presence, if any, of warm ocean waters over the continental shelf.\u003c/br\u003eTo conduct a seismic survey of the continental shelf to assess the long-term evolution of the glacial system in the Aurora Subglacial Basin.\u003c/br\u003eTo collect marine sediment cores to determine the regional deglacial to Holocene climate history and the influence of warm circumpolar deep water.", "east": 146.0, "geometry": ["POINT(131.5 -66.5)"], "keywords": "Antarctica; Cryosphere; Diatom; NBP1402; Totten Glacier", "locations": "Antarctica; Antarctica; Totten Glacier", "north": -66.0, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Leventer, Amy; NBP1402 science party, ", "project_titles": "Collaborative Research: Totten Glacier System and the Marine Record of Cryosphere - Ocean Dynamics", "projects": [{"proj_uid": "p0000008", "repository": "USAP-DC", "title": "Collaborative Research: Totten Glacier System and the Marine Record of Cryosphere - Ocean Dynamics"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -67.0, "title": "NBP1402 diatom data", "uid": "601845", "west": 117.0}, {"awards": "1841228 Lyons, W. Berry", "bounds_geometry": ["POINT(163.4863 -77.5607)"], "date_created": "Tue, 15 Oct 2024 00:00:00 GMT", "description": "Detailed water chemistry data from a collection of water samples at the delta of Commonwealth stream in Taylor Valley, Antarctica at even intervals across the day in 2020. The samples have been analyzed using a handheld meter for pH and temperature, ion chromatography for major ions, ICP-MS for iron concentrations", "east": 163.4863, "geometry": ["POINT(163.4863 -77.5607)"], "keywords": "Antarctica; Commonwealth Stream; Cryosphere; Diel; Inlandwaters; McMurdo Dry Valleys; Stream Chemistry; Water Chemisty", "locations": "Commonwealth Stream; McMurdo Dry Valleys; Antarctica", "north": -77.5607, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Gardner, Christopher B.", "project_titles": "Fe Behavior and Bioavailability in Sub-aerial Runoff into the Ross Sea", "projects": [{"proj_uid": "p0010483", "repository": "USAP-DC", "title": "Fe Behavior and Bioavailability in Sub-aerial Runoff into the Ross Sea"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.5607, "title": "Commonwealth Stream Diel Water Chemistry", "uid": "601844", "west": 163.4863}, {"awards": "2136938 Tedesco, Marco", "bounds_geometry": ["POLYGON((-40 67.55,-39.611 67.55,-39.222 67.55,-38.833 67.55,-38.444 67.55,-38.055 67.55,-37.666 67.55,-37.277 67.55,-36.888 67.55,-36.499 67.55,-36.11 67.55,-36.11 67.28999999999999,-36.11 67.03,-36.11 66.77,-36.11 66.51,-36.11 66.25,-36.11 65.99,-36.11 65.73,-36.11 65.47,-36.11 65.21000000000001,-36.11 64.95,-36.499 64.95,-36.888 64.95,-37.277 64.95,-37.666 64.95,-38.055 64.95,-38.444 64.95,-38.833 64.95,-39.222 64.95,-39.611 64.95,-40 64.95,-40 65.21000000000001,-40 65.47,-40 65.73,-40 65.99,-40 66.25,-40 66.51,-40 66.77,-40 67.03,-40 67.28999999999999,-40 67.55))"], "date_created": "Mon, 07 Oct 2024 00:00:00 GMT", "description": "This dataset contains high-resolution satellite-derived snow/ice surface melt-related data on a common 100 m equal area grid (Albers equal area projection; EPSG 9822) over Helheim Glacier and surrounding areas in Greenland. The data is used as part of a machine learning framework that aims to fill data gaps in computed meltwater fraction on the 100 m grid using a range of methods, results of which will be published separately.\r\n\u003cbr/\u003e\u003cbr/\u003e\r\n\u003cbr/\u003e\u003cbr/\u003eThe data include fraction of a grid cell covered by meltwater derived from Sentinel-1 synthetic aperture radar (SAR) backscatter, satellite-derived passive microwave (PMW) brightness temperatures, snowpack liquid water content within the first meter of snow and atmospheric and radiative variables from the Mod\u00e9le Atmosph\u00e9rique R\u00e8gional (MAR) regional climate model, spectral reflectance in four wavelength bands from the Moderate Resolution Imaging Spectroradiometer (MODIS), a static digital elevation model (DEM), and an ice sheet mask. \r\n\u003cbr/\u003e\u003cbr/\u003eA similar dataset has also been produced for Larsen C ice shelf and is also available through the US Antarctic Program Data Center. \r\n\u003cbr/\u003e\u003cbr/\u003e\r\n\u003cbr/\u003e\u003cbr/\u003e\r\n\u003cbr/\u003e\u003cbr/\u003e", "east": -36.11, "geometry": ["POINT(-38.055 66.25)"], "keywords": "Antarctica; Climate Modeling; Cryosphere; Downscaling; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Greenland; Ice Sheet; Machine Learning; MAR; Remote Sensing; Sea Level Rise; Snow/ice; Snow/Ice; Surface Melt", "locations": "Greenland; Antarctica; Greenland", "north": 67.55, "nsf_funding_programs": "Polar Cyberinfrastructure", "persons": "Alexander, Patrick; Antwerpen, Raphael; Cervone, Guido; Fettweis, Xavier; L\u00fctjens, Bj\u00f6rn; Tedesco, Marco", "project_titles": "Collaborative Research: EAGER: Generation of high resolution surface melting maps over Antarctica using regional climate models, remote sensing and machine learning", "projects": [{"proj_uid": "p0010277", "repository": "USAP-DC", "title": "Collaborative Research: EAGER: Generation of high resolution surface melting maps over Antarctica using regional climate models, remote sensing and machine learning"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": 64.95, "title": "Surface melt-related multi-source remote-sensing and climate model data over Helheim Glacier, Greenland for segmentation and machine learning applications", "uid": "601841", "west": -40.0}, {"awards": "2136938 Tedesco, Marco", "bounds_geometry": ["POLYGON((-68.5 -65.25,-67.35 -65.25,-66.2 -65.25,-65.05 -65.25,-63.9 -65.25,-62.75 -65.25,-61.6 -65.25,-60.45 -65.25,-59.3 -65.25,-58.15 -65.25,-57 -65.25,-57 -65.652,-57 -66.054,-57 -66.456,-57 -66.858,-57 -67.25999999999999,-57 -67.66199999999999,-57 -68.064,-57 -68.466,-57 -68.868,-57 -69.27,-58.15 -69.27,-59.3 -69.27,-60.45 -69.27,-61.6 -69.27,-62.75 -69.27,-63.9 -69.27,-65.05 -69.27,-66.2 -69.27,-67.35 -69.27,-68.5 -69.27,-68.5 -68.868,-68.5 -68.466,-68.5 -68.064,-68.5 -67.66199999999999,-68.5 -67.25999999999999,-68.5 -66.858,-68.5 -66.456,-68.5 -66.054,-68.5 -65.652,-68.5 -65.25))"], "date_created": "Mon, 07 Oct 2024 00:00:00 GMT", "description": "This dataset contains high-resolution satellite-derived snow/ice surface melt-related data on a common 100 m equal area grid (Lambert azimuthal equal area projection; EPSG 9820) over Larsen C Ice Shelf and surrounding areas in Antarctica. The data is prepared to be used as part of a machine learning framework that aims to fill data gaps in computed meltwater fraction on the 100 m grid using a range of methods, results of which will be published separately.\r\n\u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003eThe data include fraction of a grid cell covered by meltwater derived from Sentinel-1 synthetic aperture radar (SAR) backscatter, satellite-derived passive microwave (PMW) brightness temperatures, snowpack liquid water content within the first meter of snow and atmospheric and radiative variables from the Mod\u00e9le Atmosph\u00e9rique R\u00e8gional (MAR) regional climate model, a static digital elevation model (DEM), and an ice sheet mask. \r\n\u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003eA similar dataset has been produced for Helheim Glacier, Greenland and is also available through the US Antarctic Program Data Center.", "east": -57.0, "geometry": ["POINT(-62.75 -67.25999999999999)"], "keywords": "Antarctica; Climate Modeling; Cryosphere; Downscaling; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Shelf; Larsen C Ice Shelf; Machine Learning; MAR; Remote Sensing; Sea Level Rise; Snow/ice; Snow/Ice; Surface Melt", "locations": "Antarctica; Larsen C Ice Shelf", "north": -65.25, "nsf_funding_programs": "Polar Cyberinfrastructure", "persons": "Alexander, Patrick; Antwerpen, Raphael; Cervone, Guido; Fettweis, Xavier; L\u00fctjens, Bj\u00f6rn; Tedesco, Marco", "project_titles": "Collaborative Research: EAGER: Generation of high resolution surface melting maps over Antarctica using regional climate models, remote sensing and machine learning", "projects": [{"proj_uid": "p0010277", "repository": "USAP-DC", "title": "Collaborative Research: EAGER: Generation of high resolution surface melting maps over Antarctica using regional climate models, remote sensing and machine learning"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -69.27, "title": "Surface melt-related multi-source remote-sensing and climate model data over Larsen C Ice Shelf, Antarctica for segmentation and machine learning applications", "uid": "601842", "west": -68.5}, {"awards": "1246463 Burns, Jennifer", "bounds_geometry": ["POLYGON((162 -75,162.6 -75,163.2 -75,163.8 -75,164.4 -75,165 -75,165.6 -75,166.2 -75,166.8 -75,167.4 -75,168 -75,168 -75.4,168 -75.8,168 -76.2,168 -76.6,168 -77,168 -77.4,168 -77.8,168 -78.2,168 -78.6,168 -79,167.4 -79,166.8 -79,166.2 -79,165.6 -79,165 -79,164.4 -79,163.8 -79,163.2 -79,162.6 -79,162 -79,162 -78.6,162 -78.2,162 -77.8,162 -77.4,162 -77,162 -76.6,162 -76.2,162 -75.8,162 -75.4,162 -75))"], "date_created": "Fri, 04 Oct 2024 00:00:00 GMT", "description": "Weddell seal metabolic hormone data. Body composition data were generated following protocols described in Shero et al. 2014. Serum hormone concentrations were determined using immunoassays. IGF binding protein concentrations were determined using protocols described in Richmond et al. 2010", "east": 168.0, "geometry": ["POINT(165 -77)"], "keywords": "Antarctica; Cryosphere; Hormones; McMurdo Sound; Ross Sea; Weddell Seal", "locations": "McMurdo Sound; Ross Sea; Antarctica", "north": -75.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Kirkham, Amy", "project_titles": "The Cost of A New Fur Coat: Interactions between Molt and Reproduction in Weddell Seals", "projects": [{"proj_uid": "p0000229", "repository": "USAP-DC", "title": "The Cost of A New Fur Coat: Interactions between Molt and Reproduction in Weddell Seals"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.0, "title": "Weddell seal metabolic hormone data", "uid": "601840", "west": 162.0}, {"awards": "2336354 Juarez Rivera, Marisol; 1937748 Sumner, Dawn", "bounds_geometry": ["POINT(163.1146 -77.6078)"], "date_created": "Wed, 02 Oct 2024 00:00:00 GMT", "description": "This dataset contains measurements of microbial mat thickness and number of laminae from Lake Fryxell, McMurdo Dry Valleys, Antarctica. Holes were melted through the ice cover of Lake Fryxell, which allowed tethered divers to collect benthic microbial mats (non-liftoff and liftoff) and microbial mats at the ice-water interface (float mats). Benthic non-liftoff and liftoff mat samples were collected from 4.3 m (n=4), 6.1 m (n=4), and 7.9 m (n=4) depths. Float mats were collected from the ice-water interface above 4.3 m (n=4), 6.1 m (n=4), and 7.9 m (n=5) depths. The mats were dissected along vertical cross sections in the field to measure mat thickness and number of laminae. Additional funding for this work was provided by the NASA Solar System Workings Program (Award #80NSSC22K0709).", "east": 163.1146, "geometry": ["POINT(163.1146 -77.6078)"], "keywords": "Antarctica; Cryosphere; Dry Valleys; Lake Fryxell; Laminae; Microbial Mat; Thickness", "locations": "Antarctica; Lake Fryxell; Dry Valleys; Antarctica", "north": -77.6078, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Integrated System Science", "persons": "Juarez Rivera, Marisol; Mackey, Tyler; Hawes, Ian; Paul, Ann; Sumner, Dawn", "project_titles": "RAPID: Is Biomass Mobilization at Ice-covered Lake Fryxell, Antarctica reaching a Critical Threshold?; Seasonal Primary Productivity and Nitrogen Cycling in Photosynthetic Mats, Lake Fryxell, McMurdo Dry Valleys", "projects": [{"proj_uid": "p0010467", "repository": "USAP-DC", "title": "RAPID: Is Biomass Mobilization at Ice-covered Lake Fryxell, Antarctica reaching a Critical Threshold?"}, {"proj_uid": "p0010219", "repository": "USAP-DC", "title": "Seasonal Primary Productivity and Nitrogen Cycling in Photosynthetic Mats, Lake Fryxell, McMurdo Dry Valleys"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.6078, "title": "Lake Fryxell 2022-2023 benthic microbial mat thickness and number of laminae", "uid": "601839", "west": 163.1146}, {"awards": "2317097 Venturelli, Ryan", "bounds_geometry": ["POLYGON((-99.793 -74.857,-99.7882 -74.857,-99.7834 -74.857,-99.77860000000001 -74.857,-99.77380000000001 -74.857,-99.769 -74.857,-99.7642 -74.857,-99.7594 -74.857,-99.75460000000001 -74.857,-99.74980000000001 -74.857,-99.745 -74.857,-99.745 -74.8583,-99.745 -74.8596,-99.745 -74.8609,-99.745 -74.8622,-99.745 -74.8635,-99.745 -74.8648,-99.745 -74.8661,-99.745 -74.8674,-99.745 -74.8687,-99.745 -74.87,-99.74980000000001 -74.87,-99.75460000000001 -74.87,-99.7594 -74.87,-99.7642 -74.87,-99.769 -74.87,-99.77380000000001 -74.87,-99.77860000000001 -74.87,-99.7834 -74.87,-99.7882 -74.87,-99.793 -74.87,-99.793 -74.8687,-99.793 -74.8674,-99.793 -74.8661,-99.793 -74.8648,-99.793 -74.8635,-99.793 -74.8622,-99.793 -74.8609,-99.793 -74.8596,-99.793 -74.8583,-99.793 -74.857))"], "date_created": "Wed, 02 Oct 2024 00:00:00 GMT", "description": "This data set contains an ice and firn density profile from Winkie Nunatak, West Antarctica. These data were collected when drilling a sub-ice access hole with an Eclipse drill in preparation for Winkie drill collection of subglacial bedrock. ", "east": -99.745, "geometry": ["POINT(-99.769 -74.8635)"], "keywords": "Antarctica; Cryosphere; Density; Firn; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Density; Ice Core Records; Snow/ice; Snow/Ice", "locations": "Antarctica", "north": -74.857, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Venturelli, Ryan", "project_titles": "NSF-NERC: Geological History Constraints on the Magnitude of Grounding Line Retreat in the Thwaites Glacier System", "projects": [{"proj_uid": "p0010165", "repository": "USAP-DC", "title": "NSF-NERC: Geological History Constraints on the Magnitude of Grounding Line Retreat in the Thwaites Glacier System"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -74.87, "title": "Firn and Ice Density at Winkie Nunatak", "uid": "601838", "west": -99.793}, {"awards": "1640481 Rotella, Jay; 2147553 Rotella, Jay", "bounds_geometry": ["POLYGON((162 -75,162.8 -75,163.6 -75,164.4 -75,165.2 -75,166 -75,166.8 -75,167.6 -75,168.4 -75,169.2 -75,170 -75,170 -75.38,170 -75.76,170 -76.14,170 -76.52,170 -76.9,170 -77.28,170 -77.66,170 -78.03999999999999,170 -78.42,170 -78.8,169.2 -78.8,168.4 -78.8,167.6 -78.8,166.8 -78.8,166 -78.8,165.2 -78.8,164.4 -78.8,163.6 -78.8,162.8 -78.8,162 -78.8,162 -78.42,162 -78.03999999999999,162 -77.66,162 -77.28,162 -76.9,162 -76.52,162 -76.14,162 -75.76,162 -75.38,162 -75))"], "date_created": "Fri, 27 Sep 2024 00:00:00 GMT", "description": "The Erebus Bay population of Weddell seals in the Ross Sea of Antarctica is the most southerly breeding population of mammal in the world, closely associated with persistent shore-fast ice, and one that has been intensively studied since 1969. The resulting long-term database, which includes data for over 29,000 marked individuals, contains detailed population information that provides an excellent opportunity to study linkages between environmental conditions and demographic processes in the Antarctic. The study population is of special interest as the Ross Sea is one of the most productive areas of the Southern Ocean and one of the most pristine marine environments on the planet. The study provides long-term demographic data for individual seals. The Access database contains information for 3 types of data on Weddell seals for the period 1969-2023. (1) Mark-recapture Data with resighting records for all individuals tagged in and around the McMurdo Sound area, as well as seals tagged at White Island; (2) Mass Dynamics Data contains physical masses and photographic records and measurements that include the date, ID number, sex, age class, weight (if successfully collected), and perspectives from which photographs were collected for each sampling occurrence; and (3) Research Procedures Data contains records of handling and research procedures conducted on Erebus Bay Weddell seals by various research teams in recent years.\r\n\u003cbr/\u003e\u003cbr/\u003e", "east": 170.0, "geometry": ["POINT(166 -76.9)"], "keywords": "AMD; Amd/Us; Antarctica; Cryosphere; McMurdo Sound; Population Dynamics; USA/NSF; USAP-DC; Weddell Seal", "locations": "McMurdo Sound; Antarctica", "north": -75.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "Rotella, Jay", "project_titles": "Collaborative Research: The Drivers and Role of Immigration in the Dynamics of the Largest Population of Weddell Seals in Antarctica under Changing Conditions; The consequences of maternal effects and environmental conditions on offspring success in an Antarctic predator", "projects": [{"proj_uid": "p0010198", "repository": "USAP-DC", "title": "The consequences of maternal effects and environmental conditions on offspring success in an Antarctic predator"}, {"proj_uid": "p0010361", "repository": "USAP-DC", "title": "Collaborative Research: The Drivers and Role of Immigration in the Dynamics of the Largest Population of Weddell Seals in Antarctica under Changing Conditions"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.8, "title": "Demographic data for Weddell Seal colonies in Erebus Bay through the 2023 Antarctic field season", "uid": "601837", "west": 162.0}, {"awards": "1853377 Shero, Michelle; 0838937 Costa, Daniel; 0838892 Burns, Jennifer", "bounds_geometry": ["POLYGON((-180 -72,-179.8 -72,-179.6 -72,-179.4 -72,-179.2 -72,-179 -72,-178.8 -72,-178.6 -72,-178.4 -72,-178.2 -72,-178 -72,-178 -72.7,-178 -73.4,-178 -74.1,-178 -74.8,-178 -75.5,-178 -76.2,-178 -76.9,-178 -77.6,-178 -78.3,-178 -79,-178.2 -79,-178.4 -79,-178.6 -79,-178.8 -79,-179 -79,-179.2 -79,-179.4 -79,-179.6 -79,-179.8 -79,180 -79,178.2 -79,176.4 -79,174.6 -79,172.8 -79,171 -79,169.2 -79,167.4 -79,165.6 -79,163.8 -79,162 -79,162 -78.3,162 -77.6,162 -76.9,162 -76.2,162 -75.5,162 -74.8,162 -74.1,162 -73.4,162 -72.7,162 -72,163.8 -72,165.6 -72,167.4 -72,169.2 -72,171 -72,172.8 -72,174.6 -72,176.4 -72,178.2 -72,-180 -72))"], "date_created": "Fri, 20 Sep 2024 00:00:00 GMT", "description": "Diel vertical migrations (DVM) have been well-documented across numerous taxa, with prey descend through the water column during daylight hours to avoid visual predators and feed at the surface at night. However, the ability of marine mammals such as Weddell seals (Leptonychotes weddellii) to follow prey to depths is likely constrained by limited breath-hold capacities and the physiological consequences of pushing aerobic thresholds. In particular, dives that exceed the aerobic dive limit require exponentially longer surface recuperation times to clear lactate byproducts from circulation. This is time that the animals then cannot spend foraging. In this study, we assess the circadian organization of the Weddell seal\u0027s dive efforts and when animals make their longest/deepest (most \u0027extreme\u0027) dives that far exceed aerobic thresholds. Sixty-two adult Weddell seals were instrumented with satellite linked relay loggers in the Ross Sea to collect behavioral information across the austral winter. Daily activities are likely to shift across the year in a highly-seasonal polar environment, and through this \u0027natural experiment\u0027 we test how free-ranging seals alter foraging behavior during Polar Day and Night (continuous light, LL and dark, DD, respectively) and varying light/dark (LD) cycling across the year.", "east": -178.0, "geometry": ["POINT(172 -75.5)"], "keywords": "Aerobic; Antarctica; Cryosphere; Weddell Seal", "locations": "Antarctica; Antarctica", "north": -72.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "Shero, Michelle", "project_titles": "Collaborative Research: Physiological and Genetic Correlates of Reproductive Success in High- versus Low-Quality Weddell seals; Collaborative Research: Weddell seals as autonomous sensors of the winter oceanography of the Ross Sea", "projects": [{"proj_uid": "p0000661", "repository": "USAP-DC", "title": "Collaborative Research: Weddell seals as autonomous sensors of the winter oceanography of the Ross Sea"}, {"proj_uid": "p0010369", "repository": "USAP-DC", "title": "Collaborative Research: Physiological and Genetic Correlates of Reproductive Success in High- versus Low-Quality Weddell seals"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.0, "title": "Weddell seal dive behavior and rhythmicity from 2010-2012 in the Ross Sea", "uid": "601835", "west": 162.0}, {"awards": "1840058 Jenouvrier, Stephanie", "bounds_geometry": ["POINT(140.017 -66.66)"], "date_created": "Mon, 16 Sep 2024 00:00:00 GMT", "description": "Climate change can influence populations of monogamous species by affecting pair-bond dynamics. This study examined the impact of climate on widowhood and divorce, and the subsequent effects on individual vital rates and life-history outcomes over 54 years in a snow petrel (Pagodroma nivea) population. We found that environmental conditions can affect pair-bond dynamics both directly and indirectly. Divorce was adaptive, occurring more frequently after breeding failure and leading to improved breeding success. Divorce probabilities also increased under severe climatic conditions, regardless of prior breeding success, supporting the ``Habitat-mediated\u201d mechanisms. Generally, pair-bond disruptions reduced subsequent vital rates and lifetime outcomes. Climate forecasts from an Atmosphere-Ocean General Circulation Model projected increased male widowhood rates due to decreased sea ice negatively affecting female survival, despite considerable uncertainty. These findings highlight the importance of environmentally induced changes in demographic and pair-bond disruption rates as crucial factors shaping demographic responses to climate change. \r\n\u003cbr/\u003e", "east": 140.017, "geometry": ["POINT(140.017 -66.66)"], "keywords": "Antarctica; Climate Change; Cryosphere; Ile des Petrels, Pointe Geologie Archipelago (66\u25e640\u2032 S, 140\u25e601\u2032 106 E), Terre Adelie, Antarctica.", "locations": "Antarctica; Ile des Petrels, Pointe Geologie Archipelago (66\u25e640\u2032 S, 140\u25e601\u2032 106 E), Terre Adelie, Antarctica.", "north": -66.66, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "jenouvrier, stephanie", "project_titles": "Polar Seabirds with Long-term Pair Bonds: Effects of Mating on Individual Fitness and Population Dynamics", "projects": [{"proj_uid": "p0010090", "repository": "USAP-DC", "title": "Polar Seabirds with Long-term Pair Bonds: Effects of Mating on Individual Fitness and Population Dynamics"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -66.66, "title": "Impact of Climate Change on Pair-Bond Dynamics of Snow Petrels (Pagodroma nivea)", "uid": "601832", "west": 140.017}, {"awards": "1643120 Iverson, Neal", "bounds_geometry": null, "date_created": "Mon, 16 Sep 2024 00:00:00 GMT", "description": "Accurately modeling the deformation of temperate glacier ice, which is at its pressure-melting temperature and contains liquid water at grain boundaries, is essential for predicting ice sheet discharge to the ocean and associated sea-level rise. Central to such modeling is Glen\u2019s flow law, in which strain rate depends on stress raised to a power of n=3-4. In sharp contrast to this nonlinearity, we find by conducting large-scale, shear-deformation experiments to tertiary creep that temperate ice is linear-viscous (n\u22481.0) over common ranges of liquid water content and stress expected near glacier beds and in ice stream margins. This linearity is likely caused by diffusive pressure-melting and refreezing at grain boundaries and could help stabilize modeled responses of ice sheets to shrinkage-induced stress increases.", "east": null, "geometry": null, "keywords": "Antarctica; Cryosphere", "locations": "Antarctica", "north": null, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Iverson, Neal", "project_titles": "NSFGEO-NERC: Collaborative Research: Two-Phase Dynamics of Temperate Ice", "projects": [{"proj_uid": "p0010197", "repository": "USAP-DC", "title": "NSFGEO-NERC: Collaborative Research: Two-Phase Dynamics of Temperate Ice"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Tertiary creep rates of temperate ice containing greater than 0.7% liquid water", "uid": "601833", "west": null}, {"awards": null, "bounds_geometry": null, "date_created": "Thu, 05 Sep 2024 00:00:00 GMT", "description": "The effects of soluble impurities on the flow of glaciers and ice sheets as well as the effects of ice flow on impurities migration are not well understood. This study investigates the effects of sulfuric acid (H2SO4) concentrations ranging from 10 to 25 ppm on the flow and fabric of polycrystalline ice under compression at temperatures of -3\u00b0C and -12\u00b0C. The results show that H2SO4-doped polycrystalline ice deforms significantly faster than high-purity polycrystalline ice, with the deformation rate being 1.5 to 3 times higher. At -12\u00b0C, the presence of H2SO4 within the grains induces the most ice softening, whereas at -3\u00b0C, H2SO4\u0027s softening effects are observed both within the grains and at grain boundaries. The migration of H2SO4 to grain boundaries during deformation leads to the formation of a liquid-like layer, with increased solubility at higher temperatures potentially homogenizing the impurities within the ice matrix. This homogenization at -3\u00b0C suggests that post-depositional processes near the bed of ice sheets could significantly alter sulfate records. At -12\u00b0C, where homogenization is absent, impurity-induced dislocation processes may heavily influence deformation and impurity migration. Additionally, the comparison of natural ice with lab-grown samples indicates that fabric development significantly impacts compressive strength and creep rates, with implications for the understanding of impurity-induced deformation processes in polar ice.", "east": null, "geometry": null, "keywords": "Antarctica; Cryosphere", "locations": "Antarctica", "north": null, "nsf_funding_programs": null, "persons": "Ogunmolasuyi, Ayobami", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": null, "title": "The Impacts of the Microstructural Location of H2SO4 on the Flow of Polycrystalline Ice", "uid": "601831", "west": null}, {"awards": "0944600 Siddoway, Christine; 9615282 Siddoway, Christine; 0338279 Siddoway, Christine", "bounds_geometry": ["POLYGON((-155.5 -75.4,-154.09 -75.4,-152.68 -75.4,-151.27 -75.4,-149.86 -75.4,-148.45 -75.4,-147.04 -75.4,-145.63 -75.4,-144.22 -75.4,-142.81 -75.4,-141.4 -75.4,-141.4 -75.682,-141.4 -75.964,-141.4 -76.24600000000001,-141.4 -76.528,-141.4 -76.81,-141.4 -77.092,-141.4 -77.374,-141.4 -77.656,-141.4 -77.938,-141.4 -78.22,-142.81 -78.22,-144.22 -78.22,-145.63 -78.22,-147.04 -78.22,-148.45 -78.22,-149.86 -78.22,-151.27 -78.22,-152.68 -78.22,-154.09 -78.22,-155.5 -78.22,-155.5 -77.938,-155.5 -77.656,-155.5 -77.374,-155.5 -77.092,-155.5 -76.81,-155.5 -76.528,-155.5 -76.24600000000001,-155.5 -75.964,-155.5 -75.682,-155.5 -75.4))"], "date_created": "Fri, 30 Aug 2024 00:00:00 GMT", "description": "Data table containing list of bedrock samples from Ford Ranges, western Marie Byrd Land. Collected and contributed by C.Siddoway, NSF principle investigator and expedition leader during 1998-99, 1999-2000, 2005-6, 2006-7, 2010-11 and 2011-12 seasons. Includes some bedrock samples obtained during 1998-9 and 1989-90 seasons during doctoral research at UCSB.", "east": -141.4, "geometry": ["POINT(-148.45 -76.81)"], "keywords": "Antarctica; Cryosphere; Gondwana; Marie Byrd Land; Migmatite", "locations": "Marie Byrd Land; Antarctica", "north": -75.4, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Earth Sciences; Antarctic Earth Sciences", "persons": "Siddoway, Christine", "project_titles": "Air-Ground Study of Tectonics at the Boundary Between the Eastern Ross Embayment and Western Marie Byrd Land, Antarctica: Basement Geology and Structure; Gneiss Dome architecture: Investigation of Form and Process in the Fosdick Mountains, W. Antarctica", "projects": [{"proj_uid": "p0000744", "repository": "USAP-DC", "title": "Gneiss Dome architecture: Investigation of Form and Process in the Fosdick Mountains, W. Antarctica"}, {"proj_uid": "p0010096", "repository": "USAP-DC", "title": "Air-Ground Study of Tectonics at the Boundary Between the Eastern Ross Embayment and Western Marie Byrd Land, Antarctica: Basement Geology and Structure"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.22, "title": "Bedrock sample data, Ford Ranges region (Marie Byrd Land)", "uid": "601829", "west": -155.5}, {"awards": "1939146 Siddoway, Christine", "bounds_geometry": ["POLYGON((-109.1 -68.6,-108.94 -68.6,-108.78 -68.6,-108.61999999999999 -68.6,-108.46 -68.6,-108.3 -68.6,-108.14 -68.6,-107.98 -68.6,-107.82 -68.6,-107.66 -68.6,-107.5 -68.6,-107.5 -68.64,-107.5 -68.67999999999999,-107.5 -68.72,-107.5 -68.75999999999999,-107.5 -68.8,-107.5 -68.84,-107.5 -68.88,-107.5 -68.92,-107.5 -68.96,-107.5 -69,-107.66 -69,-107.82 -69,-107.98 -69,-108.14 -69,-108.3 -69,-108.46 -69,-108.61999999999999 -69,-108.78 -69,-108.94 -69,-109.1 -69,-109.1 -68.96,-109.1 -68.92,-109.1 -68.88,-109.1 -68.84,-109.1 -68.8,-109.1 -68.75999999999999,-109.1 -68.72,-109.1 -68.67999999999999,-109.1 -68.64,-109.1 -68.6))"], "date_created": "Tue, 27 Aug 2024 00:00:00 GMT", "description": "The table contains sample identifiers, location data, and geochronology data (U-Pb zircon dates; apatite fission track determinations) from selected intervals of sediment cores obtained at sites U1532 (A, B, C, G) and U1533 (A, B) recovered during IODP Expedition 379 to the outer Amundsen Sea, Antarctica.", "east": -107.5, "geometry": ["POINT(-108.3 -68.8)"], "keywords": "Amundsen Sea; Antarctica; Cryosphere; Geochronology; Marie Byrd Land; Subglacial Bedrock; Thermochronology", "locations": "Amundsen Sea; Antarctica; Amundsen Sea; Marie Byrd Land", "north": -68.6, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Siddoway, Christine", "project_titles": "Collaborative Research: Testing the Linchpin of WAIS Collapse with Diatoms and IRD in Pleistocene and Late Pliocene Strata of the Resolution Drift, Amundsen Sea, Antarctica", "projects": [{"proj_uid": "p0010451", "repository": "USAP-DC", "title": "Collaborative Research: Testing the Linchpin of WAIS Collapse with Diatoms and IRD in Pleistocene and Late Pliocene Strata of the Resolution Drift, Amundsen Sea, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -69.0, "title": "U-Pb zircon and apatite fission track dates for IRD (ice-rafted cobbles and mineral grains) from IODP379 drill sites", "uid": "601828", "west": -109.1}, {"awards": "1929991 Pettit, Erin C", "bounds_geometry": ["POLYGON((-112.31 -74.8,-111.61500000000001 -74.8,-110.92 -74.8,-110.225 -74.8,-109.53 -74.8,-108.83500000000001 -74.8,-108.14 -74.8,-107.445 -74.8,-106.75 -74.8,-106.055 -74.8,-105.36 -74.8,-105.36 -74.83,-105.36 -74.86,-105.36 -74.89,-105.36 -74.92,-105.36 -74.94999999999999,-105.36 -74.97999999999999,-105.36 -75.00999999999999,-105.36 -75.03999999999999,-105.36 -75.07,-105.36 -75.1,-106.055 -75.1,-106.75 -75.1,-107.445 -75.1,-108.14 -75.1,-108.83500000000001 -75.1,-109.53 -75.1,-110.225 -75.1,-110.92 -75.1,-111.61500000000001 -75.1,-112.31 -75.1,-112.31 -75.07,-112.31 -75.03999999999999,-112.31 -75.00999999999999,-112.31 -74.97999999999999,-112.31 -74.94999999999999,-112.31 -74.92,-112.31 -74.89,-112.31 -74.86,-112.31 -74.83,-112.31 -74.8))"], "date_created": "Fri, 23 Aug 2024 00:00:00 GMT", "description": "This is a dataset of elevations of sub-ice-shelf seafloor and ice-shelf bottom derived from active-source-seismic sounding conducted at discrete points distributed over the Thwaites Eastern Ice Shelf (TEIS) and Dotson Ice Shelf (DIS). Also included are the ice-shelf surface elevation at each seismic-shot location derived from the concurrent GNSS recording and P-wave speed profile through firn derived from shallow refraction-seismic surveys on each ice shelf. Raw seismic records are also provided as SEGY files.", "east": -105.36, "geometry": ["POINT(-108.83500000000001 -74.94999999999999)"], "keywords": "Antarctica; Cryosphere; Dotson Ice Shelf; Thwaites Glacier", "locations": "Dotson Ice Shelf; Thwaites Glacier; Antarctica", "north": -74.8, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Muto, Atsuhiro; Alley, Karen; Roccaro, Alexander; Pettit, Erin; Truffer, Martin; Scambos, Ted; Wild, Christian; Pomraning, Dale; Wallin, Bruce", "project_titles": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment", "projects": [{"proj_uid": "p0010162", "repository": "USAP-DC", "title": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -75.1, "title": "Sub-ice-shelf seafloor elevation derived from point-source active-seismic data on Thwaites Eastern Ice Shelf and Dotson Ice Shelf, December 2019 and January 2020", "uid": "601827", "west": -112.31}, {"awards": "2019719 Brook, Edward", "bounds_geometry": null, "date_created": "Mon, 19 Aug 2024 00:00:00 GMT", "description": "Field report for I-188, the purpose of which was to find a suitable site to extract a continuous \u003e1 Ma ice core in the Allan Hills accumulation zone.", "east": null, "geometry": null, "keywords": "Allan Hills; Antarctica; Cryosphere", "locations": "Allan Hills; Antarctica", "north": null, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Conway, Howard; Shaya, Margot; Manos, John-Morgan; Horlings, Annika; Epifanio, Jenna", "project_titles": "Center for Oldest Ice Exploration", "projects": [{"proj_uid": "p0010321", "repository": "USAP-DC", "title": "Center for Oldest Ice Exploration"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "COLDEX", "south": null, "title": "Allan Hills I-188 Field Season Report 2022-2023", "uid": "601826", "west": null}, {"awards": "2035580 Aarons, Sarah", "bounds_geometry": ["POINT(159.31 -76.7)"], "date_created": "Thu, 15 Aug 2024 00:00:00 GMT", "description": "This dataset contains Sr and Nd isotope compositions of ice core dust from ALHIC1903 spanning the transition from MIS 6 through 5e.", "east": 159.31, "geometry": ["POINT(159.31 -76.7)"], "keywords": "ALHIC1903; Allan Hills; Antarctica; Cryosphere; Dust; Ice Core Data; Isotope; Nd; Neodymium; Sr; Strontium", "locations": "Antarctica; Antarctica; Allan Hills", "north": -76.7, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Carter, Austin", "project_titles": "Collaborative Research: Peripheral East Antarctic ice as a unique recorder of climate variability during the Last Interglacial", "projects": [{"proj_uid": "p0010270", "repository": "USAP-DC", "title": "Collaborative Research: Peripheral East Antarctic ice as a unique recorder of climate variability during the Last Interglacial"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -76.7, "title": "Strontium and neodymium isotope compositions of ice core dust from ALHIC1903 drilled at the Allan Hills Blue Ice Area.", "uid": "601820", "west": 159.31}, {"awards": "2035580 Aarons, Sarah", "bounds_geometry": ["POINT(159.31 -76.7)"], "date_created": "Thu, 15 Aug 2024 00:00:00 GMT", "description": "This dataset contains dust mass concentrations, coarse particle fraction, interpolated accumulation rate, and dust flux from ALHIC1903 spanning the transition from MIS 6 through 5e.", "east": 159.31, "geometry": ["POINT(159.31 -76.7)"], "keywords": "Accumulation Rate; ALHIC1903; Allan Hills; Antarctica; Blue Ice; Concentration; Cryosphere; Dust; Flux", "locations": "Allan Hills; Antarctica", "north": -76.7, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Carter, Austin", "project_titles": "Collaborative Research: Peripheral East Antarctic ice as a unique recorder of climate variability during the Last Interglacial", "projects": [{"proj_uid": "p0010270", "repository": "USAP-DC", "title": "Collaborative Research: Peripheral East Antarctic ice as a unique recorder of climate variability during the Last Interglacial"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -76.7, "title": "Concentration and flux of ice core dust from ALHIC1903 drilled at the Allan Hills Blue Ice Area", "uid": "601825", "west": 159.31}, {"awards": "2019719 Brook, Edward", "bounds_geometry": ["POLYGON((158 -75,158.2 -75,158.4 -75,158.6 -75,158.8 -75,159 -75,159.2 -75,159.4 -75,159.6 -75,159.8 -75,160 -75,160 -75.2,160 -75.4,160 -75.6,160 -75.8,160 -76,160 -76.2,160 -76.4,160 -76.6,160 -76.8,160 -77,159.8 -77,159.6 -77,159.4 -77,159.2 -77,159 -77,158.8 -77,158.6 -77,158.4 -77,158.2 -77,158 -77,158 -76.8,158 -76.6,158 -76.4,158 -76.2,158 -76,158 -75.8,158 -75.6,158 -75.4,158 -75.2,158 -75))"], "date_created": "Thu, 15 Aug 2024 00:00:00 GMT", "description": "Field report for Allan Hills ice core drilling and geophysics, field season 2023-2024", "east": 160.0, "geometry": ["POINT(159 -76)"], "keywords": "Allan Hills; Antarctica; Coldex; Cryosphere", "locations": "Allan Hills; Antarctica", "north": -75.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Marks Peterson, Julia; Higgins, John; Brook, Edward J.; Shackleton, Sarah; Carter, Austin; Manos, John-Morgan; Hudak, Abigail; Banerjee, Asmita; Morton, Elizabeth; Jayred, Michael; Goverman, Ashley; Mayo, Emalia; Epifanio, Jenna", "project_titles": "Center for Oldest Ice Exploration", "projects": [{"proj_uid": "p0010321", "repository": "USAP-DC", "title": "Center for Oldest Ice Exploration"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "COLDEX", "south": -77.0, "title": "2023-2024 Allan Hills End-of-Season Science Report", "uid": "601824", "west": 158.0}, {"awards": "2035580 Aarons, Sarah", "bounds_geometry": ["POINT(159.31 -76.7)"], "date_created": "Thu, 15 Aug 2024 00:00:00 GMT", "description": "This dataset contains oxygen and hydrogen isotope compositions and associated d-excess of ice from ALHIC1903 spanning the transition from MIS 6 through 5e.", "east": 159.31, "geometry": ["POINT(159.31 -76.7)"], "keywords": "ALHIC1903; Allan Hills; Antarctica; Cryosphere; Deuterium; Hydrogen; Ice; Ice Core Data; Isotope; Oxygen; Water", "locations": "Allan Hills; Antarctica", "north": -76.7, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Carter, Austin", "project_titles": "Collaborative Research: Peripheral East Antarctic ice as a unique recorder of climate variability during the Last Interglacial", "projects": [{"proj_uid": "p0010270", "repository": "USAP-DC", "title": "Collaborative Research: Peripheral East Antarctic ice as a unique recorder of climate variability during the Last Interglacial"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.7, "title": "Oxygen and hydrogen isotope compositions and associated d-excess of ice from ALHIC1903 drilled at the Allan Hills Blue Ice Area.", "uid": "601822", "west": 159.31}, {"awards": "2035580 Aarons, Sarah", "bounds_geometry": ["POINT(159.31 -76.7)"], "date_created": "Thu, 15 Aug 2024 00:00:00 GMT", "description": "This dataset contains rare earth elemental concentrations of leached ice core dust from ALHIC1903 spanning the transition from MIS 6 through 5e.", "east": 159.31, "geometry": ["POINT(159.31 -76.7)"], "keywords": "ALHIC1903; Allan Hills; Antarctica; Blue Ice; Cryosphere; Dust; Leach; Rare Earth Element", "locations": "Allan Hills; Antarctica", "north": -76.7, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Carter, Austin", "project_titles": "Collaborative Research: Peripheral East Antarctic ice as a unique recorder of climate variability during the Last Interglacial", "projects": [{"proj_uid": "p0010270", "repository": "USAP-DC", "title": "Collaborative Research: Peripheral East Antarctic ice as a unique recorder of climate variability during the Last Interglacial"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.7, "title": "Rare earth elemental concentrations of leached ice core dust from ALHIC1903 drilled at the Allan Hills Blue Ice Area.", "uid": "601821", "west": 159.31}, {"awards": "1744871 Robinson, Rebecca", "bounds_geometry": ["POLYGON((-80 -59,-76.8 -59,-73.6 -59,-70.4 -59,-67.2 -59,-64 -59,-60.8 -59,-57.599999999999994 -59,-54.4 -59,-51.2 -59,-48 -59,-48 -60.6,-48 -62.2,-48 -63.8,-48 -65.4,-48 -67,-48 -68.6,-48 -70.2,-48 -71.8,-48 -73.4,-48 -75,-51.2 -75,-54.4 -75,-57.6 -75,-60.8 -75,-64 -75,-67.2 -75,-70.4 -75,-73.6 -75,-76.8 -75,-80 -75,-80 -73.4,-80 -71.8,-80 -70.2,-80 -68.6,-80 -67,-80 -65.4,-80 -63.8,-80 -62.2,-80 -60.6,-80 -59))"], "date_created": "Tue, 13 Aug 2024 00:00:00 GMT", "description": "This dataset includes measurements of diatom-bound nitrogen isotopic composition (d15Ndb; \u2030 vs air), bulk sedimentary nitrogen isotopic composition (d15Nbulk; \u2030 vs air), and total nitrogen (wt%) from 81 Holocene and late deglacial-aged samples from ODP Site 1098B on the western Antarctic Peninsula.", "east": -48.0, "geometry": ["POINT(-64 -67)"], "keywords": "Antarctica; Antarctic Peninsula; Cryosphere; Geochemistry; Sediment", "locations": "Antarctic Peninsula; Antarctica", "north": -59.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Dove, Isabel; Jones, Colin; Kelly, Roger; Robinson, Rebecca", "project_titles": "The nitrogen isotopic composition of diatom resting spores in Southern Ocean sediments: A source of bias and/or paleoenvironmental information?", "projects": [{"proj_uid": "p0010234", "repository": "USAP-DC", "title": "The nitrogen isotopic composition of diatom resting spores in Southern Ocean sediments: A source of bias and/or paleoenvironmental information?"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -75.0, "title": "Diatom-bound and bulk sedimentary N isotopes from ODP Site 1098, Western Antarctic Peninsula", "uid": "601816", "west": -80.0}, {"awards": "1744871 Robinson, Rebecca", "bounds_geometry": ["POLYGON((100 -62,104.4 -62,108.8 -62,113.2 -62,117.6 -62,122 -62,126.4 -62,130.8 -62,135.2 -62,139.6 -62,144 -62,144 -64,144 -66,144 -68,144 -70,144 -72,144 -74,144 -76,144 -78,144 -80,144 -82,139.6 -82,135.2 -82,130.8 -82,126.4 -82,122 -82,117.6 -82,113.19999999999999 -82,108.8 -82,104.4 -82,100 -82,100 -80,100 -78,100 -76,100 -74,100 -72,100 -70,100 -68,100 -66,100 -64,100 -62))"], "date_created": "Tue, 13 Aug 2024 00:00:00 GMT", "description": "This dataset includes measurements of diatom-bound nitrogen isotopic composition (d15Ndb; \u2030 vs air), bulk sedimentary nitrogen isotopic composition (d15Nbulk; \u2030 vs air), and total nitrogen (wt%) from 121 samples from IODP Site U1357B in the Adelie Basin. The sediments are Holocene age (11 kyBP to present).", "east": 144.0, "geometry": ["POINT(122 -72)"], "keywords": "Antarctica; Cryosphere; Wilkes Land", "locations": "Wilkes Land; Antarctica", "north": -62.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Dove, Isabel; Kelly, Roger; Robinson, Rebecca", "project_titles": "The nitrogen isotopic composition of diatom resting spores in Southern Ocean sediments: A source of bias and/or paleoenvironmental information?", "projects": [{"proj_uid": "p0010234", "repository": "USAP-DC", "title": "The nitrogen isotopic composition of diatom resting spores in Southern Ocean sediments: A source of bias and/or paleoenvironmental information?"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -82.0, "title": "Diatom-bound and bulk sedimentary nitrogen isotopes from IODP Site U1357", "uid": "601817", "west": 100.0}, {"awards": "1744871 Robinson, Rebecca", "bounds_geometry": ["POLYGON((100 -62,104.4 -62,108.8 -62,113.2 -62,117.6 -62,122 -62,126.4 -62,130.8 -62,135.2 -62,139.6 -62,144 -62,144 -64,144 -66,144 -68,144 -70,144 -72,144 -74,144 -76,144 -78,144 -80,144 -82,139.6 -82,135.2 -82,130.8 -82,126.4 -82,122 -82,117.6 -82,113.19999999999999 -82,108.8 -82,104.4 -82,100 -82,100 -80,100 -78,100 -76,100 -74,100 -72,100 -70,100 -68,100 -66,100 -64,100 -62))"], "date_created": "Tue, 13 Aug 2024 00:00:00 GMT", "description": "This dataset includes quantitative diatom assemblage data from 60 samples from IODP Site U1357B on the Adelie Basin. The record spans from 11,000 yBP to present.", "east": 144.0, "geometry": ["POINT(122 -72)"], "keywords": "Antarctica; Cryosphere; Geochemistry; Sediment; Wilkes Land", "locations": "Wilkes Land; Antarctica", "north": -62.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Dove, Isabel", "project_titles": "The nitrogen isotopic composition of diatom resting spores in Southern Ocean sediments: A source of bias and/or paleoenvironmental information?", "projects": [{"proj_uid": "p0010234", "repository": "USAP-DC", "title": "The nitrogen isotopic composition of diatom resting spores in Southern Ocean sediments: A source of bias and/or paleoenvironmental information?"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -82.0, "title": "Diatom assemblage from IODP Site U1357", "uid": "601818", "west": 100.0}, {"awards": "2019719 Brook, Edward; 1744832 Severinghaus, Jeffrey", "bounds_geometry": ["POLYGON((158 -75,158.2 -75,158.4 -75,158.6 -75,158.8 -75,159 -75,159.2 -75,159.4 -75,159.6 -75,159.8 -75,160 -75,160 -75.2,160 -75.4,160 -75.6,160 -75.8,160 -76,160 -76.2,160 -76.4,160 -76.6,160 -76.8,160 -77,159.8 -77,159.6 -77,159.4 -77,159.2 -77,159 -77,158.8 -77,158.6 -77,158.4 -77,158.2 -77,158 -77,158 -76.8,158 -76.6,158 -76.4,158 -76.2,158 -76,158 -75.8,158 -75.6,158 -75.4,158 -75.2,158 -75))"], "date_created": "Tue, 13 Aug 2024 00:00:00 GMT", "description": "Field report for 2019/2020 Allan Hill shallow drilling season", "east": 160.0, "geometry": ["POINT(159 -76)"], "keywords": "Allan Hills; Antarctica; Cryosphere", "locations": "Allan Hills; Antarctica", "north": -75.0, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Higgins, John; Shackleton, Sarah; Morgan, Jacob; Epifanio, Jenna; Kuhl, Tanner; Morton, Elizabeth; Zajicek, Anna; Nesbitt, Ian; Carter, Austin", "project_titles": "Center for Oldest Ice Exploration", "projects": [{"proj_uid": "p0010321", "repository": "USAP-DC", "title": "Center for Oldest Ice Exploration"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "COLDEX", "south": -77.0, "title": "2019-2020 Allan Hills Field Report", "uid": "601819", "west": 158.0}, {"awards": null, "bounds_geometry": null, "date_created": "Tue, 23 Jul 2024 00:00:00 GMT", "description": "This dataset includes measurements of the Deuterium isotopic Composition of Atmospheric Methane (\u03b4D-CH4) of gas bubbles from the Talos Dome Ice Core (TALDICE). All measurements were made at the University of Bern Ice Core Laboratory (Bern, Switzerland) using a new methane stable isotope analytical system. The data are displayed as a function of TALDICE depth and were corrected for gravitational and diffusional fractionation that occurs in the firn column according to Buizert et al., 2013. 1-sigma measurement uncertainty is also included and is determined from analytical uncertainty and uncertainties associated with diffusional and gravitational fractionation. Additional funding for this work was provided by the Swiss National Foundation: Award #200020_172506, and #200020B_200328L.", "east": null, "geometry": null, "keywords": "Abrupt Climate Change; Antarctica; Biogeochemical Cycles; Carbon Cycle; Cryosphere; Ice Core Records; Talos Dome", "locations": "Talos Dome; Antarctica", "north": null, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Riddell-Young, Benjamin; Iseli, Rene; Lee, James; Schmitt, Jochen; Fischer, Hubertus; Bauska, Thomas; Menking, James; Clark, Reid; Brook, Edward J.", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": null, "title": "Deuterium isotopic composition of atmospheric methane across Dansgaard Oesgher Event 8, Talos Dome Ice Core, Antarctica", "uid": "601814", "west": null}, {"awards": "1745078 Brook, Edward J.", "bounds_geometry": null, "date_created": "Tue, 23 Jul 2024 00:00:00 GMT", "description": "This dataset includes ~60-year resolution measurements of the Carbon-13 and Deuterium isotopic Composition of Atmospheric Methane (\u03b413C-CH4 and \u03b4D-CH4, respectively) of gas bubbles from the WAIS Divide Replicate Ice Core. All measurements were made at the University of Bern Ice Core Laboratory (Bern, Switzerland) using a new methane stable isotope analytical system. The data includes depth-adjacent replicate samples (separated by no more than 0.3m of depth). The data are displayed as a function of WAIS Divide Replicate Core depth and were corrected for gravitational and diffusional fractionation that occurs in the firn column according to Buizert et al., 2013. 1-sigma measurement uncertainty is also included and is determined from analytical uncertainty and uncertainties associated with diffusional and gravitational fractionation. Additional funding for this work was provided by the Swiss National Foundation, Awards #200020_172506 and #200020B_200328L.", "east": null, "geometry": null, "keywords": "Abrupt Climate Change; Antarctica; Atmospheric Gases; Biogeochemical Cycles; Carbon Cycle; Cryosphere; Greenhouse Gas; Methane; West Antarctic Ice Sheet Divide", "locations": "West Antarctic Ice Sheet Divide; Antarctica", "north": null, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Riddell-Young, Benjamin; Lee, James; Schmitt, Jochen; Fischer, Hubertus; Bauska, Thomas; Menking, Andy; Iseli, Rene; Clark, Reid; Brook, Edward J.", "project_titles": "Tracing Past Methane Variations with Stable Isotopes in Antarctic Ice Cores", "projects": [{"proj_uid": "p0010416", "repository": "USAP-DC", "title": "Tracing Past Methane Variations with Stable Isotopes in Antarctic Ice Cores"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": null, "title": "Carbon-13 and Deuterium isotopic composition of atmospheric methane across Heinrich Stadial 4, and Dansgaard Oesgher Event 8, WAIS Divide Replicate Ice Core, Antarctica", "uid": "601813", "west": null}, {"awards": "0087144 Conway, Howard", "bounds_geometry": ["POLYGON((-150 -83.5,-148 -83.5,-146 -83.5,-144 -83.5,-142 -83.5,-140 -83.5,-138 -83.5,-136 -83.5,-134 -83.5,-132 -83.5,-130 -83.5,-130 -83.65,-130 -83.8,-130 -83.95,-130 -84.1,-130 -84.25,-130 -84.4,-130 -84.55,-130 -84.7,-130 -84.85,-130 -85,-132 -85,-134 -85,-136 -85,-138 -85,-140 -85,-142 -85,-144 -85,-146 -85,-148 -85,-150 -85,-150 -84.85,-150 -84.7,-150 -84.55,-150 -84.4,-150 -84.25,-150 -84.1,-150 -83.95,-150 -83.8,-150 -83.65,-150 -83.5))"], "date_created": "Mon, 22 Jul 2024 00:00:00 GMT", "description": "Marine ice sheets are low-pass filters of climate variability that take centuries to adjust to interior and near-terminus changes in mass balance. Constraining these century-scale changes from satellite observations that span only the last 40 years is challenging. Here, we take a different approach of carefully synthesizing different data sets to infer changes in the configurations of van der Veen and Mercer Ice Streams on the Siple Coast over the past 3000 years from englacial features encoded in ice-penetrating radar data. Englacial radar data from Conway Ridge reveal smooth, surface conformal layers overlying disrupted stratigraphy that suggest the van der Veen Ice Stream was 40 km wider over 3000 years ago. Englacial layer dating indicates that the ice stream narrowed to its present configuration between $\\sim3000$ and $\\sim1000$ years ago. Similarly disrupted stratigraphy and buried crevasses suggest that ice flowing from Mercer to Whillans Ice Stream across the northwestern tip of the ridge slowed shortly after. Using an ice-flow model capable of simulating shear margin migration, we evaluate whether small changes in ice thickness can lead to large changes in shear margin location. Our results suggest that the tip of Conway Ridge is sensitive to thinning and thickening, and that when the basal strength at the tip of the ridge increases with the height above flotation, the ice sheet shear margins can change quickly.", "east": -130.0, "geometry": ["POINT(-140 -84.25)"], "keywords": "Antarctica; Cryosphere; Siple Coast", "locations": "Siple Coast; Antarctica", "north": -83.5, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Hoffman, Andrew; Conway, Howard; Christianson, Knut", "project_titles": "Glacial History of Ridge AB, West Antarctica", "projects": [{"proj_uid": "p0010470", "repository": "USAP-DC", "title": "Glacial History of Ridge AB, West Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -85.0, "title": "Impulse HF radar data from Conway Ridge", "uid": "601810", "west": -150.0}, {"awards": "0440775 Jacobs, Stanley; 0632282 Jacobs, Stanley", "bounds_geometry": ["POLYGON((-116.9985 -67.6776,-112.63225 -67.6776,-108.266 -67.6776,-103.89975000000001 -67.6776,-99.5335 -67.6776,-95.16725 -67.6776,-90.801 -67.6776,-86.43475000000001 -67.6776,-82.0685 -67.6776,-77.70224999999999 -67.6776,-73.336 -67.6776,-73.336 -68.37069,-73.336 -69.06378,-73.336 -69.75687,-73.336 -70.44996,-73.336 -71.14305,-73.336 -71.83614,-73.336 -72.52923,-73.336 -73.22232000000001,-73.336 -73.91541000000001,-73.336 -74.6085,-77.70224999999999 -74.6085,-82.0685 -74.6085,-86.43475000000001 -74.6085,-90.801 -74.6085,-95.16725 -74.6085,-99.5335 -74.6085,-103.89975000000001 -74.6085,-108.266 -74.6085,-112.63225 -74.6085,-116.9985 -74.6085,-116.9985 -73.91541000000001,-116.9985 -73.22232000000001,-116.9985 -72.52923,-116.9985 -71.83614,-116.9985 -71.14305,-116.9985 -70.44996,-116.9985 -69.75687,-116.9985 -69.06378,-116.9985 -68.37069,-116.9985 -67.6776))"], "date_created": "Mon, 22 Jul 2024 00:00:00 GMT", "description": "Ocean currents, temperature, salinity and pressure time series from five oceanographic moorings deployed in the Amundsen and Bellingshausen Seas, Antarctica. The moorings were deployed during the 2006 expedition ANT-XXIII/4 aboard the R/V Polarstern and retrieved during the R/V Nathaniel B. Palmer cruise NBP0702 in 2007. The deployments were part of a multidisciplinary effort to study the upwelling of relatively warm deep water onto the Amundsen Sea continental shelf and how it relates to atmospheric forcing and bottom bathymetry and how the warm waters interact with both glacial and sea ice. This study constitutes a contribution of a coordinated research effort in the region known as the Amundsen Sea Embayment Project or ASEP.", "east": -73.336, "geometry": ["POINT(-95.16725 -71.14305)"], "keywords": "Amundsen Sea; Antarctica; Cryosphere; Mooring; Ocean Currents; Pressure; Salinity; Temperature", "locations": "Antarctica; Amundsen Sea", "north": -67.6776, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences; Antarctic Ocean and Atmospheric Sciences", "persons": "Jacobs, Stanley; Giulivi, Claudia F.", "project_titles": "Collaborative International Research: Amundsen Sea Influence on West Antarctic Ice Sheet Stability and Sea Level Rise - IPY/ASEP; The Amundsen Continental Shelf and the Antarctic Ice Sheet", "projects": [{"proj_uid": "p0000836", "repository": "USAP-DC", "title": "The Amundsen Continental Shelf and the Antarctic Ice Sheet"}, {"proj_uid": "p0000332", "repository": "USAP-DC", "title": "Collaborative International Research: Amundsen Sea Influence on West Antarctic Ice Sheet Stability and Sea Level Rise - IPY/ASEP"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -74.6085, "title": "Amundsen Sea Continental Shelf Mooring Data (2006-2007)", "uid": "601809", "west": -116.9985}, {"awards": "0636696 DeVries, Arthur; 1142158 Cheng, Chi-Hing; 1543383 Postlethwait, John; 2026045 Schofield, Oscar; 1440435 Ducklow, Hugh", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Mon, 22 Jul 2024 00:00:00 GMT", "description": "This data set includes photographs and metadata from phylogenetic analyses associated with the description of Akarotaxis gouldae n. sp., or the Banded Dragonfish (Bathydraconidae).", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Bellingshausen Sea; Cryosphere; Southern Ocean", "locations": "Southern Ocean; Bellingshausen Sea; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems; Antarctic Integrated System Science; Antarctic Integrated System Science; Antarctic Organisms and Ecosystems", "persons": "Corso, Andrew; Desvignes, Thomas; McDowell, Jan; Cheng, Chi-Hing; Biesack, Ellen; Steinberg, Deborah; Hilton, Eric", "project_titles": "Antarctic Notothenioid Fish Freeze Avoidance and Genome-wide Evolution for Life in the Cold; Environmental, Organismal and Evolutionary Physiology of Freeze Avoidance in Antarctic Notothenioid Fishes; LTER Palmer, Antarctica (PAL): Land-Shelf-Ocean Connectivity, Ecosystem Resilience and Transformation in a Sea-Ice Influenced Pelagic Ecosystem", "projects": [{"proj_uid": "p0000560", "repository": "USAP-DC", "title": "Environmental, Organismal and Evolutionary Physiology of Freeze Avoidance in Antarctic Notothenioid Fishes"}, {"proj_uid": "p0000133", "repository": "USAP-DC", "title": "LTER Palmer, Antarctica (PAL): Land-Shelf-Ocean Connectivity, Ecosystem Resilience and Transformation in a Sea-Ice Influenced Pelagic Ecosystem"}, {"proj_uid": "p0010091", "repository": "USAP-DC", "title": "Antarctic Notothenioid Fish Freeze Avoidance and Genome-wide Evolution for Life in the Cold"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "LTER", "south": -90.0, "title": "Metadata associated with the description of Akarotaxis gouldae n. sp. (Bathydraconidae)", "uid": "601811", "west": -180.0}, {"awards": "2000992 Romans, Brian", "bounds_geometry": ["POLYGON((-174 -74.1667,-173.93 -74.1667,-173.86 -74.1667,-173.79 -74.1667,-173.72 -74.1667,-173.65 -74.1667,-173.58 -74.1667,-173.51000000000002 -74.1667,-173.44 -74.1667,-173.37 -74.1667,-173.3 -74.1667,-173.3 -74.25503,-173.3 -74.34336,-173.3 -74.43169,-173.3 -74.52002,-173.3 -74.60835,-173.3 -74.69668,-173.3 -74.78501,-173.3 -74.87334,-173.3 -74.96167,-173.3 -75.05,-173.37 -75.05,-173.44 -75.05,-173.51000000000002 -75.05,-173.58 -75.05,-173.65 -75.05,-173.72 -75.05,-173.79 -75.05,-173.86 -75.05,-173.93 -75.05,-174 -75.05,-174 -74.96167,-174 -74.87334,-174 -74.78501,-174 -74.69668,-174 -74.60835,-174 -74.52002,-174 -74.43169,-174 -74.34336,-174 -74.25503,-174 -74.1667))"], "date_created": "Wed, 10 Jul 2024 00:00:00 GMT", "description": "This data set includes grain size information from late Pliocene through Pleistocene aged sediment recovered in cores from International Ocean Discovery Program (IODP) Expedition 374 Sites U1524 and U1525, on the continental slope and rise of the Ross Sea margin. There are two types of particle size data: (1) laser diffraction (Mastersizer 3000) data of silt-range sediment subsampled from mm-scale thick laminae/beds, and (2) x-ray-monitored settling (SediGraph 5120) data from muddy intervals directly overlying the silt laminae/beds. For Site U1524, there are 100 samples of Mastersizer data coupled with 100 samples of SediGraph data. For Site U1525, there are 50 samples of Mastersizer data coupled with 50 samples of SediGraph data. For both sites, the analyzed samples span the depth range of the core that contains the silty laminae/beds. ", "east": -173.3, "geometry": ["POINT(-173.65 -74.60835)"], "keywords": "Antarctica; Cryosphere; Grain Size; Ross Sea", "locations": "Ross Sea; Antarctica", "north": -74.1667, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Romans, Brian W.; Varela, Natalia", "project_titles": "COLLABORATIVE RESEARCH: Orbital-scale Variability of the West Antarctic Ice Sheet and the Formation of Bottom Water in the Ross Sea during the Pliocene-Pleistocene", "projects": [{"proj_uid": "p0010227", "repository": "USAP-DC", "title": "COLLABORATIVE RESEARCH: Orbital-scale Variability of the West Antarctic Ice Sheet and the Formation of Bottom Water in the Ross Sea during the Pliocene-Pleistocene"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -75.05, "title": "Grain size of Plio-Pleistocene continental slope and rise sediments, Hillary Canyon, Ross Sea", "uid": "601807", "west": -174.0}, {"awards": "2042495 Blackburn, Terrence; 1644171 Blackburn, Terrence", "bounds_geometry": ["POLYGON((161.9 -77.65,161.96 -77.65,162.02 -77.65,162.08 -77.65,162.14000000000001 -77.65,162.2 -77.65,162.26 -77.65,162.32 -77.65,162.38 -77.65,162.44 -77.65,162.5 -77.65,162.5 -77.66000000000001,162.5 -77.67,162.5 -77.68,162.5 -77.69,162.5 -77.7,162.5 -77.71000000000001,162.5 -77.72,162.5 -77.73,162.5 -77.74,162.5 -77.75,162.44 -77.75,162.38 -77.75,162.32 -77.75,162.26 -77.75,162.2 -77.75,162.14000000000001 -77.75,162.08 -77.75,162.02 -77.75,161.96 -77.75,161.9 -77.75,161.9 -77.74,161.9 -77.73,161.9 -77.72,161.9 -77.71000000000001,161.9 -77.7,161.9 -77.69,161.9 -77.68,161.9 -77.67,161.9 -77.66000000000001,161.9 -77.65))"], "date_created": "Mon, 01 Jul 2024 00:00:00 GMT", "description": "This dataset contains uranium and thorium isotopic compositions (U-234, U-235, U-238, Th-230, Th-232) and major element compositions (Al, K, Na, Ca, Fe, Mn, reported as oxides) for silicate sediments from glaciogenic drifts associated with advances of Taylor Glacier in Taylor Valley, Antarctica. Isotopic measurements were obtained by ID-TIMS in the Keck Isotope Facility at UC Santa Cruz and elemental measurements were obtained by ICP-OES in the Plasma Analytical Laboratory. All measurements include fully propagated analytical and systematic (e.g. isotopic tracer) uncertainties. Chemical index of alteration was calculated from major element data. Prior to measurements, sediments were sieved to \u2264125 \u03bcm grain sizes, separated into quartz-feldspar-rich and clay-rich aliquots by hydraulic settling, and subjected to sequential chemical extractions (\"leaching\") prior to silicate digestion.", "east": 162.5, "geometry": ["POINT(162.2 -77.7)"], "keywords": "Antarctica; Cryosphere; Erosion; Isotope Data; Major Elements; Soil; Taylor Glacier; Taylor Valley", "locations": "Taylor Valley; Taylor Glacier; Antarctica", "north": -77.65, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Earth Sciences", "persons": "Edwards, Graham; Piccione, Gavin; Blackburn, Terrence; Tulaczyk, Slawek", "project_titles": "Collaborative Research: Reconstructing East Antarctica\u2019s Past Response to Climate using Subglacial Precipitates; U-Series Comminution Age Constraints on Taylor Valley Erosion", "projects": [{"proj_uid": "p0010243", "repository": "USAP-DC", "title": "U-Series Comminution Age Constraints on Taylor Valley Erosion"}, {"proj_uid": "p0010192", "repository": "USAP-DC", "title": "Collaborative Research: Reconstructing East Antarctica\u2019s Past Response to Climate using Subglacial Precipitates"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.75, "title": "U-Th isotopes and major elements in sediments from Taylor Valley, Antarctica", "uid": "601806", "west": 161.9}, {"awards": "1939139 Scherer, Reed", "bounds_geometry": null, "date_created": "Thu, 27 Jun 2024 00:00:00 GMT", "description": "This dataset contains physical measurements of specimens of the Southern Ocean diatom Fragilariopsis kerguelensis. We used the image segmentation software SHERPA (Kloster et al., 2017) to make physical measurements of each valve including \"rectangularity\". F. kerguelensis rectangularity has been posited to change in response to Sea Surface Temperature, a relationship that we explore in this study by calculating SSTs using established and new valve rectangularity/SST calibrations. ", "east": null, "geometry": null, "keywords": "Amundsen Sea; Antarctica; Cryosphere; Oceanography; Sabrina Coast; Sea Surface Temperature; Southern Ocean", "locations": "Sabrina Coast; Amundsen Sea; Sabrina Coast; Antarctica; Southern Ocean; Amundsen Sea; Antarctica", "north": null, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Ruggiero, Joseph", "project_titles": "Collaborative Research: Testing the Linchpin of WAIS Collapse with Diatoms and IRD in Pleistocene and Late Pliocene Strata of the Resolution Drift, Amundsen Sea, Antarctica", "projects": [{"proj_uid": "p0010451", "repository": "USAP-DC", "title": "Collaborative Research: Testing the Linchpin of WAIS Collapse with Diatoms and IRD in Pleistocene and Late Pliocene Strata of the Resolution Drift, Amundsen Sea, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Population morphometrics of the Southern Ocean diatom Fragilariopsis kerguelensis related to Sea Surface Temperature", "uid": "601804", "west": null}, {"awards": "2023355 Schmandt, Brandon", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Wed, 26 Jun 2024 00:00:00 GMT", "description": "This catalog/dataset contains 60,006 seismic events between magnitude (Mw) -1.0 and 4.5. It was obtained using publicly available seismic data from 2000 through 2020. The catalog was generated using a workflow that includes new and established software for earthquake detection (Mousavi et al., 2020; Woollam et al., 2022), association (Zhang et al., 2019), location (Lomax et al., 2000, 2009) and magnitude estimation (Satriano, 2022). Events in the catalog are located near volcanoes, outlet glaciers, ice shelves, and within the continental interior. The catalog thus includes events from diverse source processes (cryospheric, volcanic, and tectonic). Preliminary observations include thousands of events near Mount Erebus, Ross Island, and the McMurdo Sound region, repeated seismic events at Ice Streams or large glaciers, and deep long period events in Marie Byrd Land Executive Committee Range. The file contains the latitude, longitude, depth, origin time, Magnitude, errors in the locations and the RMS. More details of the data set and all relevant methods can be found in Pena Castro et al., 2024.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Cryosphere; Earthquakes; Icequakes; Volcanic Events", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Pena Castro, Andres", "project_titles": "EAGER: Lowering the detection threshold of Antarctic seismicity to reveal undiscovered intraplate deformation", "projects": [{"proj_uid": "p0010450", "repository": "USAP-DC", "title": "EAGER: Lowering the detection threshold of Antarctic seismicity to reveal undiscovered intraplate deformation"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "A seismic catalog for the southernmost continent", "uid": "601805", "west": -180.0}, {"awards": "1903681 Brook, Edward J.", "bounds_geometry": ["POLYGON((160 -77.6,160.25 -77.6,160.5 -77.6,160.75 -77.6,161 -77.6,161.25 -77.6,161.5 -77.6,161.75 -77.6,162 -77.6,162.25 -77.6,162.5 -77.6,162.5 -77.63,162.5 -77.66,162.5 -77.69,162.5 -77.72,162.5 -77.75,162.5 -77.78,162.5 -77.81,162.5 -77.84,162.5 -77.87,162.5 -77.9,162.25 -77.9,162 -77.9,161.75 -77.9,161.5 -77.9,161.25 -77.9,161 -77.9,160.75 -77.9,160.5 -77.9,160.25 -77.9,160 -77.9,160 -77.87,160 -77.84,160 -77.81,160 -77.78,160 -77.75,160 -77.72,160 -77.69,160 -77.66,160 -77.63,160 -77.6))"], "date_created": "Wed, 26 Jun 2024 00:00:00 GMT", "description": "This data set is a new N2O isotopic data set including site preference isotopic data derived from ice core samples containing air spanning the deglacial N2O rise (16.5-13.2 ka). The data extend through the Younger Dryas cooling interval, when N2O decreased by about 30 ppb (13.2-11.9 ka). The data set also contains N2O isotope records spanning the Heinrich Stadial 4 / Dansgaard-Oeschger 8 (HS4/DO8) transition (39.8-35.8 ka), an example of cyclical millennial-scale N2O variability characteristic of the last ice age. ", "east": 162.5, "geometry": ["POINT(161.25 -77.75)"], "keywords": "Antarctica; Cryosphere; Ice Core; Nitrous Oxide; Taylor Glacier", "locations": "Taylor Glacier; Antarctica; Taylor Glacier", "north": -77.6, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Menking, Andy; Brook, Edward J.", "project_titles": "Deciphering Changes in Atmospheric Nitrous Oxide Concentration During the Last Ice Age Using the Intramolecular Site-Preference of Nitrogen Isotopes", "projects": [{"proj_uid": "p0010465", "repository": "USAP-DC", "title": "Deciphering Changes in Atmospheric Nitrous Oxide Concentration During the Last Ice Age Using the Intramolecular Site-Preference of Nitrogen Isotopes"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.9, "title": "Final N2O isotopic data including isotopomer ratios for the last deglaciation and Heinrich Stadia 4/Dansgaard Oeschger Event 8", "uid": "601803", "west": 160.0}, {"awards": "2129252 Iverson, Neal", "bounds_geometry": null, "date_created": "Fri, 14 Jun 2024 00:00:00 GMT", "description": "This dataset contains parameters and results of laboratory experiments in which the permeability of temperate ice was measured for foliated ice disks collected from Athabasca Glacier. Data are in Data are in Microsoft Excel and .txt file formats. Further inquiries can be directed to the corresponding author, Jacob R. Fowler. Email: jrfowler@sas.upenn.edu.", "east": null, "geometry": null, "keywords": "Antarctica; Cryosphere; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Stream; Lab Experiment; Rheology; Snow/ice; Snow/Ice; Water Content", "locations": "Antarctica; Antarctica", "north": null, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Iverson, Neal; Fowler, Jacob", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": null, "title": "Permeability anisotropy of foliated glacier ice", "uid": "601801", "west": null}, {"awards": "2129252 Iverson, Neal", "bounds_geometry": null, "date_created": "Fri, 14 Jun 2024 00:00:00 GMT", "description": "This dataset contains parameters and results of laboratory experiments in which the permeability of temperate ice was measured as a function of water content and grain size. Further inquiries can be directed to the corresponding author, Jacob R. Fowler. Email: jrfowler@iastate.edu.", "east": null, "geometry": null, "keywords": "Antarctica; Cryosphere; Glaciology; Ice Stream; Lab Experiment; Rheology; Water Content", "locations": "Antarctica; Antarctica; Antarctica", "north": null, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Iverson, Neal; Fowler, Jacob", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": null, "title": "Relationship Between the Permeability and Liquid Water Content of Polycrystalline Temperate Ice", "uid": "601802", "west": null}, {"awards": "8020002 Kyle, Philip", "bounds_geometry": ["POLYGON((163.6 -73,163.76 -73,163.92 -73,164.07999999999998 -73,164.23999999999998 -73,164.39999999999998 -73,164.56 -73,164.72 -73,164.88 -73,165.04 -73,165.2 -73,165.2 -73.05,165.2 -73.1,165.2 -73.15,165.2 -73.2,165.2 -73.25,165.2 -73.3,165.2 -73.35,165.2 -73.4,165.2 -73.45,165.2 -73.5,165.04 -73.5,164.88 -73.5,164.72 -73.5,164.56 -73.5,164.39999999999998 -73.5,164.23999999999998 -73.5,164.07999999999998 -73.5,163.92 -73.5,163.76 -73.5,163.6 -73.5,163.6 -73.45,163.6 -73.4,163.6 -73.35,163.6 -73.3,163.6 -73.25,163.6 -73.2,163.6 -73.15,163.6 -73.1,163.6 -73.05,163.6 -73))"], "date_created": "Thu, 13 Jun 2024 00:00:00 GMT", "description": "Ar/Ar age dates, electron microprobe analyses of mineral phase and geochemical analyses of rock samples are presented for samples collected at Mount Overlord and surrounded areas in northern Victoria Land, Antarctica.", "east": 165.2, "geometry": ["POINT(164.39999999999998 -73.25)"], "keywords": "Antarctica; Cryosphere; Geochemistry; Mount Overlord", "locations": "Mount Overlord; Antarctica", "north": -73.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Kyle, Philip", "project_titles": "Petrogenesis of the McMurdo Volcanic Group and the Nature of the Subcontinental Mantle in Victoria Land, Antarctica", "projects": [{"proj_uid": "p0010487", "repository": "USAP-DC", "title": "Petrogenesis of the McMurdo Volcanic Group and the Nature of the Subcontinental Mantle in Victoria Land, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -73.5, "title": "Mount Overlord, northern Victoria Land. Age, mineralogical and geochemical data", "uid": "601799", "west": 163.6}, {"awards": "2213704 MacAyeal, Douglas", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Thu, 13 Jun 2024 00:00:00 GMT", "description": "This document represents a white paper that articulates a perspective on future research directions based on discussions of glacial climate intervention held at workshops at the University of Chicago (2\u20133 October 2023) and Stanford University (8\u20139 December 2023), and at an American Geophysical Union town hall (12 December 2023). Opinions expressed here are those of the authors only and do not necessarily reflect opinions held by all attendees of the workshops and town hall.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Chicago; Cryosphere", "locations": "Chicago; Antarctica; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "MacAyeal, Douglas; Mankoff, Kenneth; Minchew, Brent; Moore, John; Wolovick, Michael", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -90.0, "title": "Glacial Climate Intervention: A Research Vision", "uid": "601797", "west": -180.0}, {"awards": "1848887 McClintock, James", "bounds_geometry": ["POLYGON((-64.36985 -64.77195,-64.3181783 -64.77195,-64.2665066 -64.77195,-64.2148349 -64.77195,-64.1631632 -64.77195,-64.1114915 -64.77195,-64.0598198 -64.77195,-64.0081481 -64.77195,-63.9564764 -64.77195,-63.9048047 -64.77195,-63.853133 -64.77195,-63.853133 -64.78477170000001,-63.853133 -64.7975934,-63.853133 -64.8104151,-63.853133 -64.8232368,-63.853133 -64.83605850000001,-63.853133 -64.8488802,-63.853133 -64.8617019,-63.853133 -64.8745236,-63.853133 -64.88734529999999,-63.853133 -64.900167,-63.9048047 -64.900167,-63.9564764 -64.900167,-64.0081481 -64.900167,-64.0598198 -64.900167,-64.1114915 -64.900167,-64.1631632 -64.900167,-64.2148349 -64.900167,-64.2665066 -64.900167,-64.3181783 -64.900167,-64.36985 -64.900167,-64.36985 -64.88734529999999,-64.36985 -64.8745236,-64.36985 -64.8617019,-64.36985 -64.8488802,-64.36985 -64.83605850000001,-64.36985 -64.8232368,-64.36985 -64.8104151,-64.36985 -64.7975934,-64.36985 -64.78477170000001,-64.36985 -64.77195))"], "date_created": "Tue, 04 Jun 2024 00:00:00 GMT", "description": "This dataset consists of underwater videos of transects along the benthos at 4 sites between the Joubin Islands and the Wawermans isalnds. These were used for community analyses of the benthic communities in combination with 2019 videos in dataset 601610 (https://doi.org/10.15784/601610 ). ", "east": -63.853133, "geometry": ["POINT(-64.1114915 -64.83605850000001)"], "keywords": "Antarctica; Biota; Cryosphere; Oceans; Southern Ocean; Video Transects", "locations": "Antarctica; Southern Ocean", "north": -64.77195, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Amsler, Charles", "project_titles": "Assemblage-wide effects of ocean acidification and ocean warming on ecologically important macroalgal-associated crustaceans in Antarctica", "projects": [{"proj_uid": "p0010193", "repository": "USAP-DC", "title": "Assemblage-wide effects of ocean acidification and ocean warming on ecologically important macroalgal-associated crustaceans in Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.900167, "title": "Underwater transect videos used for 2020 and 2023 community analyses", "uid": "601796", "west": -64.36985}, {"awards": "2011285 Santora, Jarrod", "bounds_geometry": ["POLYGON((-63 -60,-62.1 -60,-61.2 -60,-60.3 -60,-59.4 -60,-58.5 -60,-57.6 -60,-56.7 -60,-55.8 -60,-54.9 -60,-54 -60,-54 -60.4,-54 -60.8,-54 -61.2,-54 -61.6,-54 -62,-54 -62.4,-54 -62.8,-54 -63.2,-54 -63.6,-54 -64,-54.9 -64,-55.8 -64,-56.7 -64,-57.6 -64,-58.5 -64,-59.4 -64,-60.3 -64,-61.2 -64,-62.1 -64,-63 -64,-63 -63.6,-63 -63.2,-63 -62.8,-63 -62.4,-63 -62,-63 -61.6,-63 -61.2,-63 -60.8,-63 -60.4,-63 -60))"], "date_created": "Tue, 28 May 2024 00:00:00 GMT", "description": "Winter survey data from the Antarctic Peninsula (including hydrography, zooplankton, and top predators) conducted from the R/V Nathaniel B. Palmer during the austral winter (August-September) of 2012-2016. Survey stations were selected from the U.S. Antarctic Marine Living Resources Program\u0027s standard grid, approximately 15-20 nm apart covering the region 60\u00b0 to 64\u00b0 S and 54\u00b0 to 63\u00b0 W. At each station, hydrography and chlorophyll measurements were collected with CTD profilers and Niskin bottles, and macrozooplankton samples were collected using an Isaacs-Kidd Midwater Trawl. Between stations, observers recorded abundance and behavior of top predators (seabirds and marine mammals).", "east": -54.0, "geometry": ["POINT(-58.5 -62)"], "keywords": "Antarctica; Antarctic Krill; Antarctic Peninsula; Cryosphere; Pack Ice; Polynya; Seabirds; Sea Ice; Winter; Zooplankton", "locations": "Antarctic Peninsula; Antarctica", "north": -60.0, "nsf_funding_programs": null, "persons": "Santora, Jarrod; Reiss, Christian; Dietrich, Kim; Czapanskiy, Max", "project_titles": "Collaborative Research: Climate, Changing Abundance and Species Interactions of Marine Birds and Mammals at South Georgia in Winter", "projects": [{"proj_uid": "p0010382", "repository": "USAP-DC", "title": "Collaborative Research: Climate, Changing Abundance and Species Interactions of Marine Birds and Mammals at South Georgia in Winter"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.0, "title": "Winter marine communities of the Antarctic Peninsula", "uid": "601795", "west": -63.0}, {"awards": "1848887 McClintock, James", "bounds_geometry": ["POINT(-64 -64)"], "date_created": "Fri, 24 May 2024 00:00:00 GMT", "description": "Feeding bioassay data from experiments testing consumption of untreated, palatable red macroalgal disks (Palmaria decipiens) by the amphipod Gondogeneia antarctica treated under ambient (pH 8.1), near future (7.7), and distant future (7.3) pH levels for 55 days.", "east": -64.0, "geometry": ["POINT(-64 -64)"], "keywords": "Antarctica; Cryosphere; Palmer Station", "locations": "Antarctica; Palmer Station", "north": -64.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Amsler, Charles", "project_titles": "Assemblage-wide effects of ocean acidification and ocean warming on ecologically important macroalgal-associated crustaceans in Antarctica", "projects": [{"proj_uid": "p0010193", "repository": "USAP-DC", "title": "Assemblage-wide effects of ocean acidification and ocean warming on ecologically important macroalgal-associated crustaceans in Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.0, "title": "Feeding of Gondogeneia antarctica maintained under ambient and low pH treatments", "uid": "601793", "west": -64.0}, {"awards": "1848887 McClintock, James", "bounds_geometry": ["POINT(-64 -64)"], "date_created": "Fri, 24 May 2024 00:00:00 GMT", "description": "Feeding bioassay data from experiments testing the palatability to an amphipod (Gondogeneia antarctica) thallus disks from the red alga, Palmaria decipiens treated under ambient (pH 8.1), near future (7.7), and distant future (7.3) pH levels for 18 days.", "east": -64.0, "geometry": ["POINT(-64 -64)"], "keywords": "Antarctica; Cryosphere; Palmer Station", "locations": "Palmer Station; Antarctica", "north": -64.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Amsler, Charles", "project_titles": "Assemblage-wide effects of ocean acidification and ocean warming on ecologically important macroalgal-associated crustaceans in Antarctica", "projects": [{"proj_uid": "p0010193", "repository": "USAP-DC", "title": "Assemblage-wide effects of ocean acidification and ocean warming on ecologically important macroalgal-associated crustaceans in Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.0, "title": "Palatability of Palmaria decipiens thallus from ambient and low pH treatments", "uid": "601792", "west": -64.0}, {"awards": "1848887 McClintock, James", "bounds_geometry": ["POINT(-64 -64)"], "date_created": "Wed, 22 May 2024 00:00:00 GMT", "description": "Feeding bioassay data from experiments testing the palatability to an amphipod (Gondogeneia antarctica) of half-natural concentration extracts of the brown alga Desmarestia menziesii treated under ambient (pH 8.1), near future (7.7), and distant future (7.3) pH levels for 52 days.", "east": -64.0, "geometry": ["POINT(-64 -64)"], "keywords": "Antarctica; Cryosphere; Palmer Station", "locations": "Antarctica; Palmer Station", "north": -64.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Amsler, Charles", "project_titles": "Assemblage-wide effects of ocean acidification and ocean warming on ecologically important macroalgal-associated crustaceans in Antarctica", "projects": [{"proj_uid": "p0010193", "repository": "USAP-DC", "title": "Assemblage-wide effects of ocean acidification and ocean warming on ecologically important macroalgal-associated crustaceans in Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.0, "title": "Palatability of Desmarestia menziesii extracts from ambient and low pH treatments", "uid": "601791", "west": -64.0}, {"awards": "0958658 Bell, Robin; 1443534 Bell, Robin; 1444690 Bell, Robin", "bounds_geometry": ["POLYGON((-180 -77,-177 -77,-174 -77,-171 -77,-168 -77,-165 -77,-162 -77,-159 -77,-156 -77,-153 -77,-150 -77,-150 -77.9,-150 -78.8,-150 -79.7,-150 -80.6,-150 -81.5,-150 -82.4,-150 -83.3,-150 -84.2,-150 -85.1,-150 -86,-153 -86,-156 -86,-159 -86,-162 -86,-165 -86,-168 -86,-171 -86,-174 -86,-177 -86,180 -86,178.1 -86,176.2 -86,174.3 -86,172.4 -86,170.5 -86,168.6 -86,166.7 -86,164.8 -86,162.9 -86,161 -86,161 -85.1,161 -84.2,161 -83.3,161 -82.4,161 -81.5,161 -80.6,161 -79.7,161 -78.8,161 -77.9,161 -77,162.9 -77,164.8 -77,166.7 -77,168.6 -77,170.5 -77,172.4 -77,174.3 -77,176.2 -77,178.1 -77,-180 -77))"], "date_created": "Wed, 22 May 2024 00:00:00 GMT", "description": "This Shallow Ice Radar (SIR) dataset is from the Frequency Modulated Continuous Wave (LFMCW) radar system on board the IcePod while deployed with the ROSETTA-Ice project during the austral summers of November 2015 - December 2017. SIR data was collected along the ROSETTA-Ice Survey Grid where possible. More detailed information is included in the ReadMe. This data was processed at Lamont-Doherty Earth Observatory using MATLAB scripts developed in-house by Tejendra Dhakal and Nicholas Frearson, using CReSIS 2013/14 MCoRDS scripts as a foundation. All levels of processed data are Matfiles as a result.\r\nIncluded in this dataset are the following: \r\n* SIR level1a Matfiles separated by ROSETTA-Ice Survey Grid Line Number;\r\n* SIR long-line images at 300dpi (PNGs) for easy data viewing, rendered in MATLAB from level1 data;\r\n* SIR internal reflector digitization picks (CSV), rendered manually using MATLAB picking scripts;\r\n* SIR digitization frame images (picked and un-picked) as JPGs output from picking process", "east": -150.0, "geometry": ["POINT(-174.5 -81.5)"], "keywords": "Antarctica; Cryosphere; Remote Sensing; Ross Ice Shelf", "locations": "Ross Ice Shelf; Antarctica", "north": -77.0, "nsf_funding_programs": "Antarctic Integrated System Science; Antarctic Instrumentation and Support; Antarctic Astrophysics and Geospace Sciences", "persons": "Cordero, Isabel; Frearson, Nicholas; Dhakal, Tejendra; Bertinato, Christopher; Chu, Winnie; Keeshin, Skye; Wearing, Martin; Spergel, Julian; Packard, Sarah; Dong, LingLing; Das, Indrani; Bell, Robin", "project_titles": "Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE); Development of an Ice Imaging System for Monitoring Changing Ice Sheets Mounted on the NYANG LC-130", "projects": [{"proj_uid": "p0010462", "repository": "USAP-DC", "title": "Development of an Ice Imaging System for Monitoring Changing Ice Sheets Mounted on the NYANG LC-130"}, {"proj_uid": "p0010035", "repository": "USAP-DC", "title": "Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -86.0, "title": "Shallow Ice Radar (SIR) Dataset from Ross Ice Shelf (ROSETTA-Ice)", "uid": "601794", "west": 161.0}, {"awards": "1443534 Bell, Robin; 0958658 Bell, Robin; 1444690 Bell, Robin", "bounds_geometry": ["POLYGON((-180 -77,-177 -77,-174 -77,-171 -77,-168 -77,-165 -77,-162 -77,-159 -77,-156 -77,-153 -77,-150 -77,-150 -77.9,-150 -78.8,-150 -79.7,-150 -80.6,-150 -81.5,-150 -82.4,-150 -83.3,-150 -84.2,-150 -85.1,-150 -86,-153 -86,-156 -86,-159 -86,-162 -86,-165 -86,-168 -86,-171 -86,-174 -86,-177 -86,180 -86,178.1 -86,176.2 -86,174.3 -86,172.4 -86,170.5 -86,168.6 -86,166.7 -86,164.8 -86,162.9 -86,161 -86,161 -85.1,161 -84.2,161 -83.3,161 -82.4,161 -81.5,161 -80.6,161 -79.7,161 -78.8,161 -77.9,161 -77,162.9 -77,164.8 -77,166.7 -77,168.6 -77,170.5 -77,172.4 -77,174.3 -77,176.2 -77,178.1 -77,-180 -77))"], "date_created": "Mon, 20 May 2024 00:00:00 GMT", "description": "This Deep ICE (DICE) radar dataset is from the pulse-chirp depth sounding radar system on board the IcePod while deployed with the ROSETTA-Ice Project during the austral summers of November 2015 - December 2017. DICE data was collected along the ROSETTA-Ice Survey grid where possible. More detailed information is included in the ReadMe, including flight lines with data loss. DICE is a dual channel sensor with pulse-chirp rate of 1us and 3us, which means the data can be processed in four pulse/channel configurations: 1usCh1, 3usCh1, 1usCh2, and 3usCh2. The included dataset is 3usCh1 DICE, which is the preferred configuration. The preferred configuration is 3usCh1, which is included in this dataset. This data was processed at Lamont-Doherty Earth Observatory using MATLAB scripts developed in-house by Tejendra Dhakal and Nicholas Frearson, with CReSIS 2014 MCoRDS scripts as a foundation. As such, all processed levels of this data product are Matfiles. Included in this dataset are the following:\r\n* DICE level2a data Matfiles, separated by ROSETTA-Ice Survey Grid Line Number;\r\n* DICE long-line images at 300dpi (PNGs) for easy data viewing rendered in MATLAB from level2 data;\r\n* DICE Ice Base digitization picks, rendered manually using MATLAB picking script;\r\n* DICE digitization frame images (picked and un-picked) as JPGs output from picking process", "east": -150.0, "geometry": ["POINT(-174.5 -81.5)"], "keywords": "Airborne Radar; Antarctica; Cryosphere; Ice Thickness; Remote Sensing; Ross Ice Shelf", "locations": "Antarctica; Ross Ice Shelf", "north": -77.0, "nsf_funding_programs": "Antarctic Instrumentation and Support; Antarctic Astrophysics and Geospace Sciences; Antarctic Integrated System Science", "persons": "Cordero, Isabel; Frearson, Nicholas; Dhakal, Tejendra; Bertinato, Christopher; Millstein, Joanna; Wilner, Joel; Dong, LingLing; Das, Indrani; Spergel, Julian; Chu, Winnie; Bell, Robin", "project_titles": "Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE); Development of an Ice Imaging System for Monitoring Changing Ice Sheets Mounted on the NYANG LC-130", "projects": [{"proj_uid": "p0010035", "repository": "USAP-DC", "title": "Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE)"}, {"proj_uid": "p0010462", "repository": "USAP-DC", "title": "Development of an Ice Imaging System for Monitoring Changing Ice Sheets Mounted on the NYANG LC-130"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -86.0, "title": "Deep ICE (DICE) Radar Dataset from Ross Ice Shelf (ROSETTA-Ice)", "uid": "601789", "west": 161.0}, {"awards": "1444690 Bell, Robin; 1443534 Bell, Robin; 0958658 Bell, Robin", "bounds_geometry": ["POLYGON((-180 -77,-177 -77,-174 -77,-171 -77,-168 -77,-165 -77,-162 -77,-159 -77,-156 -77,-153 -77,-150 -77,-150 -77.9,-150 -78.8,-150 -79.7,-150 -80.6,-150 -81.5,-150 -82.4,-150 -83.3,-150 -84.2,-150 -85.1,-150 -86,-153 -86,-156 -86,-159 -86,-162 -86,-165 -86,-168 -86,-171 -86,-174 -86,-177 -86,180 -86,178.1 -86,176.2 -86,174.3 -86,172.4 -86,170.5 -86,168.6 -86,166.7 -86,164.8 -86,162.9 -86,161 -86,161 -85.1,161 -84.2,161 -83.3,161 -82.4,161 -81.5,161 -80.6,161 -79.7,161 -78.8,161 -77.9,161 -77,162.9 -77,164.8 -77,166.7 -77,168.6 -77,170.5 -77,172.4 -77,174.3 -77,176.2 -77,178.1 -77,-180 -77))"], "date_created": "Fri, 17 May 2024 00:00:00 GMT", "description": "This LiDAR data is from the RIEGL VQ-580 Airborne Laser Scanner onboard IcePod while deployed with the ROSETTA-Ice Project during November 2015 - December 2017. This data was processed at Lamont-Doherty Earth Observatory using RIEGL\u0027s RiPROCESS Data Processing Software.\r\n\r\nLiDAR data was collected along the ROSETTA-Ice Survey Grid where possible. Survey flights with no data are listed in the ReadMe. Clouds have been removed where possible.\r\n", "east": -150.0, "geometry": ["POINT(-174.5 -81.5)"], "keywords": "Antarctica; Cryosphere; Ross Ice Shelf", "locations": "Ross Ice Shelf; Antarctica", "north": -77.0, "nsf_funding_programs": "Antarctic Astrophysics and Geospace Sciences; Antarctic Integrated System Science; Antarctic Instrumentation and Support", "persons": "Locke, Caitlin; Bertinato, Christopher; Dhakal, Tejendra; Becker, Maya K; Starke, Sarah; Boghosian, Alexandra", "project_titles": "Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE)", "projects": [{"proj_uid": "p0010035", "repository": "USAP-DC", "title": "Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -86.0, "title": "LiDAR Nadir and Swath Data from Ross Ice Shelf, Antarctica (ROSETTA-Ice)", "uid": "601788", "west": 161.0}, {"awards": "2218402 Fegyveresi, John", "bounds_geometry": ["POLYGON((-148.812 -79.467,-143.7458 -79.467,-138.67960000000002 -79.467,-133.6134 -79.467,-128.5472 -79.467,-123.48100000000001 -79.467,-118.41480000000001 -79.467,-113.3486 -79.467,-108.28240000000001 -79.467,-103.21620000000001 -79.467,-98.15 -79.467,-98.15 -80.52029999999999,-98.15 -81.5736,-98.15 -82.6269,-98.15 -83.6802,-98.15 -84.73349999999999,-98.15 -85.7868,-98.15 -86.8401,-98.15 -87.8934,-98.15 -88.94669999999999,-98.15 -90,-103.2162 -90,-108.28240000000001 -90,-113.3486 -90,-118.41480000000001 -90,-123.48100000000001 -90,-128.5472 -90,-133.6134 -90,-138.6796 -90,-143.7458 -90,-148.812 -90,-148.812 -88.94669999999999,-148.812 -87.8934,-148.812 -86.8401,-148.812 -85.7868,-148.812 -84.73349999999999,-148.812 -83.6802,-148.812 -82.6269,-148.812 -81.5736,-148.812 -80.52029999999999,-148.812 -79.467))"], "date_created": "Thu, 16 May 2024 00:00:00 GMT", "description": "This data set includes all measurements and observations used in conjunction with NSF funded project 2218402 - \"EAGER: Constraining the Expected Brittle-ice Behavior for the Hercules Dome Ice-core Site\". Data is directly related to the Masters Thesis of NAU graduate student Samantha Barnett", "east": -98.15, "geometry": ["POINT(-123.48100000000001 -84.73349999999999)"], "keywords": "Antarctica; Brittle Ice; Cryosphere; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Glaciology; Ice Core; Ice Core Records; Ice Core Records; Physical Properties; Simple Dome; Siple Dome; South Pole; SPICEcore; Subgrain Boundaries; WAIS Divide", "locations": "Simple Dome; South Pole; WAIS Divide; Antarctica; Siple Dome; WAIS Divide", "north": -79.467, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Fegyveresi, John; Barnett, Samantha", "project_titles": "EAGER: Constraining the Expected Brittle-ice Behavior for the Hercules Dome Ice-core Site.", "projects": [{"proj_uid": "p0010378", "repository": "USAP-DC", "title": "EAGER: Constraining the Expected Brittle-ice Behavior for the Hercules Dome Ice-core Site."}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core", "south": -90.0, "title": "Multi-Site Brittle Ice Data and Measurements", "uid": "601786", "west": -148.812}, {"awards": "1848887 McClintock, James; 1744550 Amsler, Charles", "bounds_geometry": ["POLYGON((-64.36985 -64.77195,-64.3181783 -64.77195,-64.2665066 -64.77195,-64.2148349 -64.77195,-64.1631632 -64.77195,-64.1114915 -64.77195,-64.0598198 -64.77195,-64.0081481 -64.77195,-63.9564764 -64.77195,-63.9048047 -64.77195,-63.853133 -64.77195,-63.853133 -64.78477170000001,-63.853133 -64.7975934,-63.853133 -64.8104151,-63.853133 -64.8232368,-63.853133 -64.83605850000001,-63.853133 -64.8488802,-63.853133 -64.8617019,-63.853133 -64.8745236,-63.853133 -64.88734529999999,-63.853133 -64.900167,-63.9048047 -64.900167,-63.9564764 -64.900167,-64.0081481 -64.900167,-64.0598198 -64.900167,-64.1114915 -64.900167,-64.1631632 -64.900167,-64.2148349 -64.900167,-64.2665066 -64.900167,-64.3181783 -64.900167,-64.36985 -64.900167,-64.36985 -64.88734529999999,-64.36985 -64.8745236,-64.36985 -64.8617019,-64.36985 -64.8488802,-64.36985 -64.83605850000001,-64.36985 -64.8232368,-64.36985 -64.8104151,-64.36985 -64.7975934,-64.36985 -64.78477170000001,-64.36985 -64.77195))"], "date_created": "Thu, 16 May 2024 00:00:00 GMT", "description": "File presents summary of image analysis of 956 screen grabs derived from 17 diver video transects of marine communities at 4 sites (A-D) along the Antarctic Peninsula surveyed in 2020 (sites B \u0026 C only) and 2023. The coordinates for these sites are in USAP-DC dataset 601330 (https://doi.org/10.15784/601330 ) and published in Amsler et al. 2003 (https://doi.org/10.1525/elementa.2023.00020).", "east": -63.853133, "geometry": ["POINT(-64.1114915 -64.83605850000001)"], "keywords": "Antarctica; Antarctic Peninsula; Biota; Cryosphere; Species Abundance; Video Transects", "locations": "Antarctica; Antarctic Peninsula", "north": -64.77195, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "Amsler, Charles", "project_titles": "Assemblage-wide effects of ocean acidification and ocean warming on ecologically important macroalgal-associated crustaceans in Antarctica", "projects": [{"proj_uid": "p0010193", "repository": "USAP-DC", "title": "Assemblage-wide effects of ocean acidification and ocean warming on ecologically important macroalgal-associated crustaceans in Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.900167, "title": "2020 and 2023 Underwater video transect community analysis data", "uid": "601787", "west": -64.36985}, {"awards": "1941327 Stammerjohn, Sharon", "bounds_geometry": ["POLYGON((-120 -71,-118 -71,-116 -71,-114 -71,-112 -71,-110 -71,-108 -71,-106 -71,-104 -71,-102 -71,-100 -71,-100 -71.4,-100 -71.8,-100 -72.2,-100 -72.6,-100 -73,-100 -73.4,-100 -73.8,-100 -74.2,-100 -74.6,-100 -75,-102 -75,-104 -75,-106 -75,-108 -75,-110 -75,-112 -75,-114 -75,-116 -75,-118 -75,-120 -75,-120 -74.6,-120 -74.2,-120 -73.8,-120 -73.4,-120 -73,-120 -72.6,-120 -72.2,-120 -71.8,-120 -71.4,-120 -71))"], "date_created": "Tue, 14 May 2024 00:00:00 GMT", "description": "This dataset includes 297 CTD vertical profiles acquired during NBP2202 in the Amundsen Sea (12 Jan to 25 Feb, 2022) using both the ship\u0027s CTD and a Trace Metal Clean (TMC) CTD package. There is an ascii file for each downcast (N=297), upcast (N=297), and bottle cast (N=192, i.e., not all casts tripped bottles), along with a README file that gives details on the instrument package, sensors, post-cruise sensor calibrations/corrections, file structure, and acknowledgements.", "east": -100.0, "geometry": ["POINT(-110 -73)"], "keywords": "Amundsen Sea; Antarctica; Cryosphere; CTD; NBP2202; Oceanography; R/v Nathaniel B. Palmer", "locations": "Amundsen Sea; Antarctica", "north": -71.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Stammerjohn, Sharon", "project_titles": "NSFGEO-NERC: Collaborative Research: Accelerating Thwaites Ecosystem Impacts for the Southern Ocean (ARTEMIS)", "projects": [{"proj_uid": "p0010249", "repository": "USAP-DC", "title": "NSFGEO-NERC: Collaborative Research: Accelerating Thwaites Ecosystem Impacts for the Southern Ocean (ARTEMIS)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -75.0, "title": "Vertical ocean profiles collected by a Conductivity-Temperature-Depth (CTD) package in the Amundsen Sea", "uid": "601785", "west": -120.0}, {"awards": "2200448 Simms, Alexander", "bounds_geometry": null, "date_created": "Fri, 10 May 2024 00:00:00 GMT", "description": "Radiocarbon dating is arguably the most common method for dating Quaternary deposits. However, accurate age assignments using radiocarbon dating are dependent on knowing the radiocarbon reservoir. For the coastal waters across Antarctica, the radiocarbon reservoirs show significant variation, ranging from 700 to 6,000 years depending on the material dated and the period in question. In this study, we examine the radiocarbon reservoir age for the shallow waters of the Southern Ocean using 23 whale bones salvaged from whaling stations operating on or near the Western Antarctic Peninsula between 1904 and 1916. The species origin of the bones had been identified previously as humpback, fin, or blue whales using sequences of mitochondrial (mt)DNA. We find an average reservoir age of 1050 +/- 135 years for these 23 whale bones, with a \u003c100 year difference in the reservoir age value by species. A comparison between our results and other studies through the Holocene suggest that the Southern Ocean surface water radiocarbon reservoir age has not significantly changed for the last 14,000 years. Combining our new ages with existing data sets provides insight to the stability of the Southern Ocean marine radiocarbon reservoir age, enhancing our understanding of ocean ventilation and upwelling dynamics throughout the Holocene.", "east": null, "geometry": null, "keywords": "Antarctica; C-14; Cryosphere; Radiocarbon Dates; Whale Bone; Whales", "locations": "Antarctica", "north": null, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Divola, Claire; Simms, Alexander; Sremba, Angela; Baker, C. Scott; Friedlaender, Ari; Southon, John", "project_titles": "New constraints on 14C reservoirs around the Antarctic Peninsula and the Southern Ocean based on historically-harvested whale bones", "projects": [{"proj_uid": "p0010457", "repository": "USAP-DC", "title": "New constraints on 14C reservoirs around the Antarctic Peninsula and the Southern Ocean based on historically-harvested whale bones"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Constraining the Radiocarbon Reservoir Age for the Southern Ocean Using Whale Bones Salvaged from Early 20th Century Whaling Stations", "uid": "601784", "west": null}, {"awards": "2138277 Gallagher, Katherine", "bounds_geometry": ["POLYGON((-97.5 -56,-92.2 -56,-86.9 -56,-81.6 -56,-76.3 -56,-71 -56,-65.7 -56,-60.4 -56,-55.1 -56,-49.800000000000004 -56,-44.5 -56,-44.5 -58,-44.5 -60,-44.5 -62,-44.5 -64,-44.5 -66,-44.5 -68,-44.5 -70,-44.5 -72,-44.5 -74,-44.5 -76,-49.8 -76,-55.1 -76,-60.4 -76,-65.7 -76,-71 -76,-76.3 -76,-81.6 -76,-86.9 -76,-92.19999999999999 -76,-97.5 -76,-97.5 -74,-97.5 -72,-97.5 -70,-97.5 -68,-97.5 -66,-97.5 -64,-97.5 -62,-97.5 -60,-97.5 -58,-97.5 -56))"], "date_created": "Thu, 09 May 2024 00:00:00 GMT", "description": "This dataset contains simulated krill trajectories from the Regional Ocean Modeling System (ROMS) in NETCDF format. Files include latitude, longitude, and depth of particles released along the West Antarctic Peninsula within the ROMS framework with diel vertical migration behavior added to simulate Antarctic krill behavior. Time frames and diel vertical migration behaviors simulated are included in a .csv file. Data currently cover 4 austral summers: 2006, 2007, 2010, and 2011. Five different vertical migration behaviors were simulated, for a total of 20 simulations.", "east": -44.5, "geometry": ["POINT(-71 -66)"], "keywords": "Antarctica; Antarctic Krill; Cryosphere; Model Data; Physical Oceanography; Regional Ocean Modeling System; ROMS; West Antarctic Shelf", "locations": "West Antarctic Shelf; Antarctica", "north": -56.0, "nsf_funding_programs": "Post Doc/Travel", "persons": "Gallagher, Katherine", "project_titles": "OPP-PRF Pygoscelis Penguin Response to Potential Prey Retention along the West Antarctic Peninsula", "projects": [{"proj_uid": "p0010349", "repository": "USAP-DC", "title": "OPP-PRF Pygoscelis Penguin Response to Potential Prey Retention along the West Antarctic Peninsula"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -76.0, "title": "Simulated krill trajectory data from Regional Ocean Modeling System simulations 2006-2007 \u0026 2010-2011", "uid": "601780", "west": -97.5}, {"awards": "2138277 Gallagher, Katherine", "bounds_geometry": ["POLYGON((-97.5 -55,-92.05 -55,-86.6 -55,-81.15 -55,-75.7 -55,-70.25 -55,-64.8 -55,-59.35 -55,-53.9 -55,-48.449999999999996 -55,-43 -55,-43 -57.1,-43 -59.2,-43 -61.3,-43 -63.4,-43 -65.5,-43 -67.6,-43 -69.7,-43 -71.8,-43 -73.9,-43 -76,-48.45 -76,-53.9 -76,-59.35 -76,-64.8 -76,-70.25 -76,-75.7 -76,-81.15 -76,-86.6 -76,-92.05000000000001 -76,-97.5 -76,-97.5 -73.9,-97.5 -71.8,-97.5 -69.7,-97.5 -67.6,-97.5 -65.5,-97.5 -63.4,-97.5 -61.3,-97.5 -59.2,-97.5 -57.099999999999994,-97.5 -55))"], "date_created": "Thu, 09 May 2024 00:00:00 GMT", "description": "This dataset includes daily-averaged current speed and velocity data from the Regional Ocean Modeling System. Domain covers the West Antarctic Peninsula. Simulations are from the 2006, 2007, 2010, and 2011 seasons.", "east": -43.0, "geometry": ["POINT(-70.25 -65.5)"], "keywords": "Antarctica; Cryosphere; Model Data; Ocean Currents; Physical Oceanography; Regional Ocean Modeling System; ROMS; West Antarctic Shelf", "locations": "West Antarctic Shelf; Antarctica", "north": -55.0, "nsf_funding_programs": "Post Doc/Travel", "persons": "Gallagher, Katherine", "project_titles": "OPP-PRF Pygoscelis Penguin Response to Potential Prey Retention along the West Antarctic Peninsula", "projects": [{"proj_uid": "p0010349", "repository": "USAP-DC", "title": "OPP-PRF Pygoscelis Penguin Response to Potential Prey Retention along the West Antarctic Peninsula"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -76.0, "title": "Current velocity and direction data from Regional Ocean Modeling System simulations (2006-2007 \u0026 2010-2011)", "uid": "601779", "west": -97.5}, {"awards": "1744871 Robinson, Rebecca", "bounds_geometry": ["POINT(-64.207 -64.86)"], "date_created": "Wed, 24 Apr 2024 00:00:00 GMT", "description": "This dataset includes measurements of opal (wt %), total organic carbon (wt %), total nitrogen (wt%), bulk nitrogen isotopic composition (d15Nbulk; \u2030 vs air), and diatom-bound nitrogen isotopic composition (d15Ndb; \u2030 vs air) from 36 samples from ODP sediment core 1098B-5H-7 on the western Antarctic Peninsula. The sediments were deposited during a period of deglaciation about 12.5-12.3 ka.", "east": -64.207, "geometry": ["POINT(-64.207 -64.86)"], "keywords": "Antarctica; Antarctic Peninsula; Cryosphere", "locations": "Antarctic Peninsula; Antarctica", "north": -64.86, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Dove, Isabel", "project_titles": "The nitrogen isotopic composition of diatom resting spores in Southern Ocean sediments: A source of bias and/or paleoenvironmental information?", "projects": [{"proj_uid": "p0010234", "repository": "USAP-DC", "title": "The nitrogen isotopic composition of diatom resting spores in Southern Ocean sediments: A source of bias and/or paleoenvironmental information?"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.86, "title": "Sediment chemistry of ODP Site 1098", "uid": "601778", "west": -64.207}, {"awards": "1744871 Robinson, Rebecca", "bounds_geometry": ["POINT(-64 -65)"], "date_created": "Wed, 24 Apr 2024 00:00:00 GMT", "description": "This dataset includes diatom assemblage and surface area data from ODP sediment core 1098B-5H-7 on the western Antarctic Peninsula. The sediments are laminated and were deposited during a period of deglaciation about 12.5-12.3 ka. Quantitative diatom assemblage counts and surface area measurements are reported for 12 samples.", "east": -64.0, "geometry": ["POINT(-64 -65)"], "keywords": "Antarctica; Antarctic Peninsula; Cryosphere; Sediment Core Data", "locations": "Antarctic Peninsula; Antarctica", "north": -65.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Dove, Isabel", "project_titles": "The nitrogen isotopic composition of diatom resting spores in Southern Ocean sediments: A source of bias and/or paleoenvironmental information?", "projects": [{"proj_uid": "p0010234", "repository": "USAP-DC", "title": "The nitrogen isotopic composition of diatom resting spores in Southern Ocean sediments: A source of bias and/or paleoenvironmental information?"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.0, "title": "ODP Site 1098 deglacial diatom assemblage", "uid": "601777", "west": -64.0}, {"awards": "1906143 Buizert, Christo", "bounds_geometry": ["POINT(-112 -79)"], "date_created": "Thu, 18 Apr 2024 00:00:00 GMT", "description": "This data set contains measurements of carbon dioxide (CO2) amount fractions in gas bubbles from the WAIS Divide ice core WD06. All measurements were made in the Ice Core Laboratory at Oregon State University in Corvallis, Oregon USA. The data set includes the replicate-mean values and measurement precision (1 sigma standard error) from all CO2 measurements published in Wendt et al. (2024) PNAS. Bauska et al. (2021) Nature Geoscience, and Marcott et al. (2014) Nature. See respective publications for details. Ages listed in years before 1950 AD on the WD2014 timescale (see Buizert et al., 2015 and Sigl et al., 2014 for chronology details).", "east": -112.0, "geometry": ["POINT(-112 -79)"], "keywords": "Antarctica; CO2; Cryosphere; Ice Core Data; WAIS Divide Ice Core; West Antarctic Ice Sheet Divide", "locations": "West Antarctic Ice Sheet Divide; Antarctica", "north": -79.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Wendt, Kathleen", "project_titles": null, "projects": null, "repositories": null, "science_programs": "WAIS Divide Ice Core", "south": -79.0, "title": "CO2 amount fractions from WAIS Divide, Antarctica", "uid": "601775", "west": -112.0}, {"awards": "1745043 Simkins, Lauren", "bounds_geometry": ["POINT(-100 -75)"], "date_created": "Thu, 11 Apr 2024 00:00:00 GMT", "description": "This dataset contains the elevation raster for Pine Island Bay and the raw elevation profiles used for each site. The transects are organized based on their orientation in relation to paleo-ice flow. They are spaced 500 meters apart, with elevation measurements extracted every 50 meters along each transect.", "east": -100.0, "geometry": ["POINT(-100 -75)"], "keywords": "Antarctica; Bed Roughness; Cryosphere; Geomorphology; Pine Island Bay", "locations": "Pine Island Bay; Antarctica", "north": -75.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Munevar Garcia, Santiago", "project_titles": "Collaborative Research: Topographic controls on Antarctic Ice Sheet grounding line retreat - integrating models and observations", "projects": [{"proj_uid": "p0010269", "repository": "USAP-DC", "title": "Collaborative Research: Topographic controls on Antarctic Ice Sheet grounding line retreat - integrating models and observations"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -75.0, "title": "Elevation transects from Pine Island Bay", "uid": "601774", "west": -100.0}, {"awards": "2044924 Barrett, John", "bounds_geometry": ["POLYGON((161.70776367188 -77.519802097166,161.899475097661 -77.519802097166,162.091186523442 -77.519802097166,162.282897949223 -77.519802097166,162.474609375004 -77.519802097166,162.666320800785 -77.519802097166,162.858032226566 -77.519802097166,163.049743652347 -77.519802097166,163.241455078128 -77.519802097166,163.433166503909 -77.519802097166,163.62487792969 -77.519802097166,163.62487792969 -77.54867059480199,163.62487792969 -77.57753909243799,163.62487792969 -77.606407590074,163.62487792969 -77.63527608771,163.62487792969 -77.664144585346,163.62487792969 -77.69301308298199,163.62487792969 -77.72188158061799,163.62487792969 -77.750750078254,163.62487792969 -77.77961857589,163.62487792969 -77.808487073526,163.433166503909 -77.808487073526,163.241455078128 -77.808487073526,163.049743652347 -77.808487073526,162.858032226566 -77.808487073526,162.666320800785 -77.808487073526,162.474609375004 -77.808487073526,162.282897949223 -77.808487073526,162.091186523442 -77.808487073526,161.899475097661 -77.808487073526,161.70776367188 -77.808487073526,161.70776367188 -77.77961857589,161.70776367188 -77.750750078254,161.70776367188 -77.72188158061799,161.70776367188 -77.69301308298199,161.70776367188 -77.664144585346,161.70776367188 -77.63527608771,161.70776367188 -77.606407590074,161.70776367188 -77.57753909243799,161.70776367188 -77.54867059480199,161.70776367188 -77.519802097166))"], "date_created": "Wed, 03 Apr 2024 00:00:00 GMT", "description": "Microbial communities are the primary drivers of carbon cycling in the McMurdo Dry Valleys of Antarctica. Dense microbial mats, consisting mainly of photosynthetic cyanobacteria, occupy aquatic areas associated with streams and lakes. Other microbial communities also occur at lower densities as patchy surface biological soil crusts (biocrusts) across the terrestrial landscape. Multispectral satellite data have been used to model microbial mat abundance in high-density areas like stream and lake margins, but no previous studies had investigated the lower detection limits of biocrusts. Here, we describe remote sensing and field-based survey and sampling approaches to study the detectability and distribution of biocrusts in the McMurdo Dry Valleys. Using a combination of multi- and hyperspectral tools and spectral linear unmixing, we modeled the abundances of biocrust in eastern Taylor Valley. Our spectral approaches can detect low masses of biocrust material in laboratory microcosms down to biocrust concentrations of 1% by mass. These techniques also distinguish the spectra of biocrust from both surface rock and mineral signatures from orbit. We found that biocrusts are present throughout the soils of eastern Taylor Valley and are associated with diverse underlying soil communities. The densest biocrust communities identified in this study had total organic carbon 5x greater than the content of typical arid soils. The most productive biocrusts were located downslope of melting snowpacks in unique soil ecosystems that are distinct from the surrounding arid landscape. There are similarities between the snowpack and stream sediment communities (high diversity of soil invertebrates) as well as their ecosystem properties (e.g., persistence of liquid water, high transfer of available nutrients, lower salinity from flushing) compared to the typical arid terrestrial ecosystem of the dry valleys. Our approach extends the capability of orbital remote sensing of photosynthetic communities out of the aquatic margins and into the drier soils which comprise most of this landscape. This interdisciplinary work is critical for measuring and monitoring terrestrial carbon stocks and predicting future ecosystem dynamics in this currently water-limited but increasingly dynamic Antarctic landscape, which is particularly climate-sensitive and difficult to access.\r\n", "east": 163.62487792969, "geometry": ["POINT(162.666320800785 -77.664144585346)"], "keywords": "Antarctica; Carbon; Cryosphere; McMurdo Dry Valleys; Snow", "locations": "McMurdo Dry Valleys; Antarctica", "north": -77.519802097166, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Barrett, John", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -77.808487073526, "title": "Hyperspectral reflectance values and biophysicochemical properties of biocrusts and soils in the Fryxell Basin, McMurdo Dry Valleys, Antarctica", "uid": "601773", "west": 161.70776367188}, {"awards": "1443677 Padman, Laurence; 9896041 Padman, Laurence", "bounds_geometry": ["POLYGON((-180 -40.231,-144 -40.231,-108 -40.231,-72 -40.231,-36 -40.231,0 -40.231,36 -40.231,72 -40.231,108 -40.231,144 -40.231,180 -40.231,180 -45.2079,180 -50.1848,180 -55.161699999999996,180 -60.1386,180 -65.1155,180 -70.0924,180 -75.0693,180 -80.0462,180 -85.0231,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -85.0231,-180 -80.0462,-180 -75.0693,-180 -70.0924,-180 -65.1155,-180 -60.138600000000004,-180 -55.1617,-180 -50.1848,-180 -45.2079,-180 -40.231))"], "date_created": "Wed, 27 Mar 2024 00:00:00 GMT", "description": "CATS2008_v2023 is an update of the original CATS2008 tide model (Howard et al., 2019 [https://doi.org/10.15784/601235]; Padman et al., 2002 [https://doi.org/10.3189/172756402781817752]). It introduces a new model file format, increased resolution, more accurate coastlines, and a simple scaling for ice shelf flexure near grounding lines. The changes included in the new CATS2008_v2023 model are: (1) The CATS2008 model has been interpolated to a finer grid (2 km for CATS2008_v2023 vs 4 km for CATS2008) to provide a better representation of coastlines and ice shelf grounding lines. (2) Coastlines have been adjusted to match BedMachine Antarctica v3 (Morlighem et al., 2020 [https://doi.org/10.1038/s41561-019-0510-8]; Morlighem, 2022 [https://doi.org/10.5067/FPSU0V1MWUB6]). Areas that were previously grounded and had no tidal constituent data in CATS2008 have been filled using MATLAB\u0027s \u2018regionfill\u2019 function, applied to the real and imaginary components of tidal constituents individually. An ocean mask matching BedMachine Antarctica v3 is provided in the model file to mask out grounded areas. (3) Water depth (water column thickness under ice shelves) has been adjusted to match BedMachine Antarctica v3. (4) An ice shelf flexure model has been included for estimating tidal deflections in grounding zones. Flexure is approximated by a forward 1D linear elastic model applied to BedMachine Antarctica v3 ice geometry, with elastic modulus E=4.8 GPa and Poisson\u0027s ratio nu=0.4. The ice flexure can be included as an option when using TMD3.0 (Greene et al., 2024 [https://doi.org/10.21105/joss.06018]) and pyTMD (Sutterley, 2024 [https://doi.org/10.5281/zenodo.10501349]) software packages. (5) The model is provided as a consolidated NetCDF file that can be used with TMD3.0 and pyTMD, but not with earlier TMD versions. ", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Cryosphere; Inverse Modeling; Model Data; Ocean Currents; Oceans; Sea Surface; Southern Ocean; Tide Model; Tides", "locations": "Antarctica; Sea Surface; Southern Ocean", "north": -40.231, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences; Antarctic Ocean and Atmospheric Sciences; Antarctic Ocean and Atmospheric Sciences", "persons": "Howard, Susan L.; Greene, Chad A.; Padman, Laurence; Erofeeva, Svetlana; Sutterley, Tyler", "project_titles": "Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE); Ocean Tides around Antarctica and in the Southern Ocean", "projects": [{"proj_uid": "p0010116", "repository": "USAP-DC", "title": "Ocean Tides around Antarctica and in the Southern Ocean"}, {"proj_uid": "p0010035", "repository": "USAP-DC", "title": "Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "CATS2008_v2023: Circum-Antarctic Tidal Simulation 2008, version 2023", "uid": "601772", "west": -180.0}, {"awards": "1841467 MacAyeal, Douglas; 1841607 Banwell, Alison", "bounds_geometry": ["POLYGON((-68.28 -71.1,-68.202 -71.1,-68.124 -71.1,-68.046 -71.1,-67.968 -71.1,-67.89 -71.1,-67.812 -71.1,-67.734 -71.1,-67.656 -71.1,-67.578 -71.1,-67.5 -71.1,-67.5 -71.14999999999999,-67.5 -71.19999999999999,-67.5 -71.25,-67.5 -71.3,-67.5 -71.35,-67.5 -71.39999999999999,-67.5 -71.44999999999999,-67.5 -71.5,-67.5 -71.55,-67.5 -71.6,-67.578 -71.6,-67.656 -71.6,-67.734 -71.6,-67.812 -71.6,-67.89 -71.6,-67.968 -71.6,-68.046 -71.6,-68.124 -71.6,-68.202 -71.6,-68.28 -71.6,-68.28 -71.55,-68.28 -71.5,-68.28 -71.44999999999999,-68.28 -71.39999999999999,-68.28 -71.35,-68.28 -71.3,-68.28 -71.25,-68.28 -71.19999999999999,-68.28 -71.14999999999999,-68.28 -71.1))"], "date_created": "Wed, 20 Mar 2024 00:00:00 GMT", "description": "This dataset contains all of the field data (GNSS, weather station data, timelapse camera images) used in the publication \u0027Banwell et al., 2024\u0027, which documents observations of surface meltwater-induced flexure and fracture at a doline on north George VI Ice Shelf, Antarctic Peninsula. ", "east": -67.5, "geometry": ["POINT(-67.89 -71.35)"], "keywords": "Antarctica; Antarctic Peninsula; AWS; Cryosphere; GNSS; GPS Data; Ice-Shelf Flexure; Ice Shelf Fracture; Ice-Shelf Melt; Timelaps Images", "locations": "Antarctic Peninsula; Antarctica", "north": -71.1, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Banwell, Alison; Willis, Ian; Stevens, Laura; Dell, Rebecca; MacAyeal, Douglas", "project_titles": "NSFGEO-NERC: Ice-shelf Instability Caused by Active Surface Meltwater Production, Movement, Ponding and Hydrofracture", "projects": [{"proj_uid": "p0010449", "repository": "USAP-DC", "title": "NSFGEO-NERC: Ice-shelf Instability Caused by Active Surface Meltwater Production, Movement, Ponding and Hydrofracture"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -71.6, "title": "Dataset for: Banwell et al. 2024, \u0027Observed meltwater-induced flexure and fracture at a doline on George VI Ice Shelf, Antarctica\u0027, Journal of Glaciology.", "uid": "601771", "west": -68.28}, {"awards": "1951500 Jenouvrier, Stephanie", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Tue, 27 Feb 2024 00:00:00 GMT", "description": "1. Differences among individuals within a population are ubiquitous. Those differences are known to affect the entire life cycle with important consequences for all demographic rates and outcomes. One source of among-individual phenotypic variation that has received little attention from a demographic perspective is animal personality, which is defined as consistent and heritable behavioral differences between individuals. While many studies have shown that individual variation in individual personality can generate individual differences in survival and reproductive rates, the impact of personality on all demographic rates and outcomes remains to be assessed empirically.\r\n\r\n\t2. Here, we used a unique, long-term, dataset coupling demography and personality of wandering albatross (Diomedea exulans) in the Crozet Archipelago and a comprehensive analysis based on a suite of approaches (capture-mark-recapture statistical models, Markov chains models and structured matrix population models). We assessed the effect of boldness on annual demographic rates (survival, breeding probability, breeding success), life-history out-comes (life expectancy, lifetime reproductive outcome, occupancy times), and an integrative demographic outcome (population growth rate).\r\n\r\n\t3. We found that boldness had little impact on female demographic rates, but was very likely associated with lower breeding probabilities in males. By integrating the effects of boldness over the entire life cycle, we found that bolder males had slightly lower lifetime reproductive success compared to shyer males. Indeed, bolder males spent a greater proportion of their lifetime as non-breeders, which suggests longer inter-breeding intervals due to higher reproductive allocation.\r\n\r\n\t4. Our results reveal that the link between boldness and demography is more complex than anticipated by the pace-of-life literature and highlight the importance of considering the entire life cycle with a comprehensive approach when assessing the role of personality on individual performance and demography.\r\n", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Cryosphere; Demography; Sub-Antarctic", "locations": "Sub-Antarctic; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Joanie, Van de Walle; Jenouvrier, Stephanie", "project_titles": "NSFGEO-NERC: Integrating Individual Personality Differences in the Evolutionary Ecology of a Seabird in the Rapidly Changing Polar Environment", "projects": [{"proj_uid": "p0010283", "repository": "USAP-DC", "title": "NSFGEO-NERC: Integrating Individual Personality Differences in the Evolutionary Ecology of a Seabird in the Rapidly Changing Polar Environment"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "The impact of boldness on demographic rates and lifehistory outcomes in the wandering albatross", "uid": "601770", "west": -180.0}, {"awards": "1939139 Scherer, Reed", "bounds_geometry": null, "date_created": "Tue, 20 Feb 2024 00:00:00 GMT", "description": "", "east": null, "geometry": null, "keywords": "Antarctica; Biogenic Silica; Diatom", "locations": "Antarctica", "north": null, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Scherer, Reed Paul; Furlong, Heather", "project_titles": "Collaborative Research: Testing the Linchpin of WAIS Collapse with Diatoms and IRD in Pleistocene and Late Pliocene Strata of the Resolution Drift, Amundsen Sea, Antarctica", "projects": [{"proj_uid": "p0010451", "repository": "USAP-DC", "title": "Collaborative Research: Testing the Linchpin of WAIS Collapse with Diatoms and IRD in Pleistocene and Late Pliocene Strata of the Resolution Drift, Amundsen Sea, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Pliocene diatom abundance, IODP 379-U1532", "uid": "601769", "west": null}, {"awards": "2019719 Brook, Edward", "bounds_geometry": ["POLYGON((50 -84,55 -84,60 -84,65 -84,70 -84,75 -84,80 -84,85 -84,90 -84,95 -84,100 -84,100 -84.6,100 -85.2,100 -85.8,100 -86.4,100 -87,100 -87.6,100 -88.2,100 -88.8,100 -89.4,100 -90,95 -90,90 -90,85 -90,80 -90,75 -90,70 -90,65 -90,60 -90,55 -90,50 -90,50 -89.4,50 -88.8,50 -88.2,50 -87.6,50 -87,50 -86.4,50 -85.8,50 -85.2,50 -84.6,50 -84))"], "date_created": "Mon, 19 Feb 2024 00:00:00 GMT", "description": "This dataset constitutes the as-recorded echo data from the MARFA radar system. The data was recorded by a National Instruments acquisition system, simultaneously with GPS, magnetics, laser range data, outside air temperature and IMU data. The data was acquired using the Environment for Linked Serial Acquisition (ELSA).\r\n\r\nThe data is provided in two forms: \r\n\u2022 Flight based and as recorded on the aircraft in raw packets\r\n\u2022 Transect based, reorganized into transects corresponding to the survey design, and demultiplexed into text tables and flat binary files.\r\n", "east": 100.0, "geometry": ["POINT(75 -87)"], "keywords": "Antarctica; Coldex; East Antarctic Plateau; Glaciology; Radar Echo Sounder", "locations": "Antarctica; East Antarctic Plateau", "north": -84.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Young, Duncan A.; Blankenship, Donald D.; Greenbaum, Jamin; Kerr, Megan; Buhl, Dillon; Ng, Gregory; Kempf, Scott D.; Chan, Kristian", "project_titles": "Center for Oldest Ice Exploration", "projects": [{"proj_uid": "p0010321", "repository": "USAP-DC", "title": "Center for Oldest Ice Exploration"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "COLDEX", "south": -90.0, "title": "NSF COLDEX Raw MARFA Ice Penetrating Radar data", "uid": "601768", "west": 50.0}, {"awards": "1744999 Todgham, Anne", "bounds_geometry": null, "date_created": "Wed, 07 Feb 2024 00:00:00 GMT", "description": "In this study we examined aerobic metabolic capacity in three species, Trematomus bernacchii, T. pennellii and T. newnesi, and between two life stages, juvenile and adult, by assessing mitochondrial function of permeabilized cardiac fibers.", "east": null, "geometry": null, "keywords": "Antarctica; McMurdo Sound", "locations": "Antarctica; McMurdo Sound", "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Todgham, Anne; Mandic, Milica; Frazier, Amanda; Naslund, Andrew", "project_titles": "Interacting Stressors: Metabolic Capacity to Acclimate under Ocean Warming and CO2- Acidification in Early Developmental Stages of Antarctic Fishes", "projects": [{"proj_uid": "p0010241", "repository": "USAP-DC", "title": "Interacting Stressors: Metabolic Capacity to Acclimate under Ocean Warming and CO2- Acidification in Early Developmental Stages of Antarctic Fishes"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "A comparative and ontogenetic examination of mitochondrial function in Antarctic notothenioid species", "uid": "601766", "west": null}, {"awards": "1744999 Todgham, Anne", "bounds_geometry": null, "date_created": "Tue, 06 Feb 2024 00:00:00 GMT", "description": "This dataset records temperature preference of two species of Antarctic nototheniod fishes, as described in the draft manuscript \u2018Naslund et al. (Forthcoming 2024) Differential temperature preferences exhibited in the juvenile Antarctic notothenioids Trematomus bernacchii and Trematomus pennellii.", "east": null, "geometry": null, "keywords": "Antarctica; McMurdo Sound; Ross Sea", "locations": "McMurdo Sound; Antarctica; Ross Sea", "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Todgham, Anne; Naslund, Andrew; Zillig, Ken; Mandic, Milica; Frazier, Amanda", "project_titles": "Interacting Stressors: Metabolic Capacity to Acclimate under Ocean Warming and CO2- Acidification in Early Developmental Stages of Antarctic Fishes", "projects": [{"proj_uid": "p0010241", "repository": "USAP-DC", "title": "Interacting Stressors: Metabolic Capacity to Acclimate under Ocean Warming and CO2- Acidification in Early Developmental Stages of Antarctic Fishes"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Differential temperature preferences exhibited in the juvenile Antarctic notothenioids Trematomus bernacchii and Trematomus pennellii", "uid": "601765", "west": null}, {"awards": "0739512 Walker, Sally; 1745064 Perez-Huerta, Alberto; 1745057 Walker, Sally; 1745080 Gillikin, David", "bounds_geometry": null, "date_created": "Mon, 05 Feb 2024 00:00:00 GMT", "description": "Adamussium colbecki is a large thin-shelled scallop common in Antarctic waters and well represented in the fossil record. Shell nitrogen isotopes in carbonate bound organic matter (d15NCBOM) have the potential to record sea ice state over time. Recent studies illustrated that d15NCBOM values provide a similar proxy as soft tissue d15N values which are in turn are predicably related to food d15N values (Gillikin et al., 2017, GCA, 200, 55\u201366, doi: 10.1016/j.gca.2016.12.008). Sea-ice organic N should have higher d15N values compared to open water organics due to nitrate draw down in the ice (Fripiat et al., 2014, Global Biogeochem. Cycles, 28, 115\u2013130, doi:10.1002/2013GB004729). To test this hypothesis we analyzed A. colbecki shells from Explorers Cove and Bay of Sails, western McMurdo Sound, Antarctica. These sites have different sea ice states: persistent (multiannual) sea ice at Explorers Cove and annual sea ice (that melts out every year) at Bay of Sails. Six adults shells collected at these sites in 2008 (3 from each site) and two juveniles collected in 2016 from Explorers Cove were be serially sampled for d15NCBOM values from the growing shell margin to the umbo. d15NCBOM values from Explorers Cove with persistent sea ice cover were consistently higher (+10 \u00b1 0.7 \u2030) than those from Bay of Sails where the sea ice melts out every year (+8 \u00b1 0.5 \u2030; t-test p\u003c0.0001). d15NCBOM data from Mid- to Late Holocene shells that grew in these locations will also be presented. We posit that nitrogen isotopes in A. colbecki shells have a high potential to record sea ice cover.", "east": null, "geometry": null, "keywords": "Adamussium Colbecki; Antarctica; Biota; Carbon Isotopes; Explorers Cove; Nitrogen Isotopes; Oxygen Isotope; Scallop", "locations": "Explorers Cove; Antarctica", "north": null, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Earth Sciences; Antarctic Earth Sciences; Antarctic Earth Sciences", "persons": "Gillikin, David; Puhalski, Emma; Camarra, Steve; Cronin, Kelly; Verheyden, Anouk; Walker, Sally", "project_titles": "Collaborative Research: Linking Modern Benthic Communities and Taphonomic Processes to the Stratigraphic Record of Antarctic Cores; Collaborative research: The Antarctic Scallop as Key to Paleoenvironments and Sea Ice Conditions: Understanding the Modern to Predict the Past", "projects": [{"proj_uid": "p0010238", "repository": "USAP-DC", "title": "Collaborative research: The Antarctic Scallop as Key to Paleoenvironments and Sea Ice Conditions: Understanding the Modern to Predict the Past"}, {"proj_uid": "p0000203", "repository": "USAP-DC", "title": "Collaborative Research: Linking Modern Benthic Communities and Taphonomic Processes to the Stratigraphic Record of Antarctic Cores"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Nitrogen, carbon, and oxygen isotopes in the shell of the Antarctic scallop Adamussium colbecki as a proxy for sea ice cover in Antarctica.", "uid": "601764", "west": null}, {"awards": "1914698 Hansen, Samantha", "bounds_geometry": ["POLYGON((148 -71.5,150.4 -71.5,152.8 -71.5,155.2 -71.5,157.6 -71.5,160 -71.5,162.4 -71.5,164.8 -71.5,167.2 -71.5,169.6 -71.5,172 -71.5,172 -72.15,172 -72.8,172 -73.45,172 -74.1,172 -74.75,172 -75.4,172 -76.05,172 -76.7,172 -77.35,172 -78,169.6 -78,167.2 -78,164.8 -78,162.4 -78,160 -78,157.6 -78,155.2 -78,152.8 -78,150.4 -78,148 -78,148 -77.35,148 -76.7,148 -76.05,148 -75.4,148 -74.75,148 -74.1,148 -73.45,148 -72.8,148 -72.15,148 -71.5))"], "date_created": "Wed, 24 Jan 2024 00:00:00 GMT", "description": "As seismic data availability increases, the necessity for automated processing techniques has become increasingly evident. Expanded geophysical datasets collected over the past several decades across Antarctica provide excellent resources to evaluate different event detection approaches. We have used the traditional Short-Term Average/Long-Term Average (STA/LTA) algorithm to catalogue seismic data recorded by 19 stations in East Antarctica between 2012 and 2015. However, the complexities of the East Antarctic dataset, including low magnitude events and phenomena such as icequakes, warrant more advanced automated detection techniques. Therefore, we have also applied template matching as well as several deep learning algorithms, including Generalized Phase Detection (GPD), PhaseNet, BasicPhaseAE, and EQTransformer (EQT), to identify seismic phases within our dataset. Our goal was not only to increase the volume of detectable seismic events but also to gain insights into the effectiveness of these different automated approaches. Our assessment evaluated the completeness of the newly generated catalogs, the precision of identified event locations, and the quality of the picks. The final events corresponding to each of our three catalogs (based on STA/LTA, template matching, and machine learning, respectively) are listed in the provided files.", "east": 172.0, "geometry": ["POINT(160 -74.75)"], "keywords": "Antarctica; Geoscientificinformation; Machine Learning; Seismic Event Detection; Seismology; Seismometer", "locations": "Antarctica", "north": -71.5, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Hansen, Samantha; Ho, Long; Walter, Jacob", "project_titles": "Collaborative Research: Resolving earth structure influence on ice-sheet stability in the Wilkes\r\nSubglacial Basin (RESISSt)", "projects": [{"proj_uid": "p0010204", "repository": "USAP-DC", "title": "Collaborative Research: Resolving earth structure influence on ice-sheet stability in the Wilkes\r\nSubglacial Basin (RESISSt)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "East Antarctic Seismicity from different Automated Event Detection Algorithms", "uid": "601762", "west": 148.0}, {"awards": "1914698 Hansen, Samantha", "bounds_geometry": ["POLYGON((90 -65,99 -65,108 -65,117 -65,126 -65,135 -65,144 -65,153 -65,162 -65,171 -65,180 -65,180 -67.5,180 -70,180 -72.5,180 -75,180 -77.5,180 -80,180 -82.5,180 -85,180 -87.5,180 -90,171 -90,162 -90,153 -90,144 -90,135 -90,126 -90,117 -90,108 -90,99 -90,90 -90,90 -87.5,90 -85,90 -82.5,90 -80,90 -77.5,90 -75,90 -72.5,90 -70,90 -67.5,90 -65))"], "date_created": "Wed, 24 Jan 2024 00:00:00 GMT", "description": "Recent investigations in polar environments have examined solid-Earth-ice-sheet feedbacks and have emphasized that glacial isostatic adjustment, tectonic, and geothermal forcings exert first-order control on the physical conditions at and below the ice-bed interface and must be taken into account when evaluating ice-sheet evolution. However, the solid-Earth structure beneath much of Antarctica is still poorly constrained given the sparse distribution of seismic stations across the continent and the generally low seismicity rate. One region of particular interest is the Wilkes Subglacial Basin (WSB) in East Antarctica. During the mid-Pliocene warm period, the WSB may have contributed 3-4 m to the estimated 20 m rise in sea-level, indicating that this region could also play an important role in future warming scenarios. However, the WSB may have experienced notable bedrock uplift since the Pliocene; therefore, past geologic inferences of instability may not serve as a simple analogue for the future.\r\n\r\nUsing records of ambient seismic noise recorded by both temporary and long-term seismic networks, along with a full-waveform tomographic inversion technique, we have developed improved images of the lithospheric structure beneath East Antarctica, including the WSB. Empirical Green\u2019s Functions with periods between 40 and 340 s have been extracted using a frequency-time normalization technique, and a finite-difference approach with a spherical grid has been employed to numerically model synthetic seismograms. Associated sensitivity kernels have also been constructed using a scattering integral method. Our results suggest the WSB is underlain by slow seismic velocities, with faster seismic structure beneath the adjacent Transantarctic Mountains and the Belgica Subglacial Highlands. This may indicate that the WSB is associated with a region of thinner lithosphere, possibly associated with prior continental rifting. The seismic heterogeneity highlighted in our model could have significant implications for understanding the geodynamic origin of WSB topography and its influence on ice-sheet behavior.\r\n\r\nThe model file and associated plotting scripts are provided.", "east": 180.0, "geometry": ["POINT(135 -77.5)"], "keywords": "Ambient Noise; Antarctica; East Antarctica; Geoscientificinformation; Seismic Tomography; Seismology", "locations": "Antarctica; East Antarctica", "north": -65.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Hansen, Samantha; Emry, Erica", "project_titles": "Collaborative Research: Resolving earth structure influence on ice-sheet stability in the Wilkes\r\nSubglacial Basin (RESISSt)", "projects": [{"proj_uid": "p0010204", "repository": "USAP-DC", "title": "Collaborative Research: Resolving earth structure influence on ice-sheet stability in the Wilkes\r\nSubglacial Basin (RESISSt)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Full Waveform Ambient Noise Tomography for East Antarctica", "uid": "601763", "west": 90.0}, {"awards": "1341612 Bowser, Samuel; 1745064 Perez-Huerta, Alberto; 1745080 Gillikin, David; 0739512 Walker, Sally; 1745057 Walker, Sally", "bounds_geometry": ["POLYGON((163 -77.2,163.2 -77.2,163.4 -77.2,163.6 -77.2,163.8 -77.2,164 -77.2,164.2 -77.2,164.4 -77.2,164.6 -77.2,164.8 -77.2,165 -77.2,165 -77.25,165 -77.3,165 -77.35000000000001,165 -77.4,165 -77.45,165 -77.5,165 -77.55,165 -77.60000000000001,165 -77.65,165 -77.7,164.8 -77.7,164.6 -77.7,164.4 -77.7,164.2 -77.7,164 -77.7,163.8 -77.7,163.6 -77.7,163.4 -77.7,163.2 -77.7,163 -77.7,163 -77.65,163 -77.60000000000001,163 -77.55,163 -77.5,163 -77.45,163 -77.4,163 -77.35000000000001,163 -77.3,163 -77.25,163 -77.2))"], "date_created": "Fri, 12 Jan 2024 00:00:00 GMT", "description": "This dataset contains stable isotopes of carbon and oxygen sampled from 6 adult and 2 juvenile Adamussium colbecki valves. Three of the adults were collected live from Bay of Sails. Three of the adults and the two juveniles were collected from Explorers Cove. ", "east": 165.0, "geometry": ["POINT(164 -77.45)"], "keywords": "Adamussium Colbecki; Antarctica; Bay Of Sails; Carbon; Explorers Cove; McMurdo Sound; Oxygen; Stable Isotopes", "locations": "McMurdo Sound; Explorers Cove; Bay Of Sails; Antarctica", "north": -77.2, "nsf_funding_programs": null, "persons": "Cronin, Kelly; Gillikin, David; Puhalski, Emma; Camarra, Steve; Andrus, Fred; Perez-Huerta, Alberto; Verheyden, Anouk; Bowser, Samuel S.; Walker, Sally", "project_titles": "Collaborative research: The Antarctic Scallop as Key to Paleoenvironments and Sea Ice Conditions: Understanding the Modern to Predict the Past", "projects": [{"proj_uid": "p0010238", "repository": "USAP-DC", "title": "Collaborative research: The Antarctic Scallop as Key to Paleoenvironments and Sea Ice Conditions: Understanding the Modern to Predict the Past"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.7, "title": "Stable isotopes of Oxygen and Carbon in Adamissium colbecki from Explorers Cove and Bay of Sails", "uid": "601761", "west": 163.0}, {"awards": "1443585 Polito, Michael; 1443386 Emslie, Steven; 1826712 McMahon, Kelton; 1443424 McMahon, Kelton", "bounds_geometry": ["POLYGON((-180 -61.59,-168.969 -61.59,-157.938 -61.59,-146.90699999999998 -61.59,-135.876 -61.59,-124.845 -61.59,-113.814 -61.59,-102.783 -61.59,-91.752 -61.59,-80.72099999999999 -61.59,-69.69 -61.59,-69.69 -63.195,-69.69 -64.8,-69.69 -66.405,-69.69 -68.01,-69.69 -69.61500000000001,-69.69 -71.22,-69.69 -72.825,-69.69 -74.43,-69.69 -76.035,-69.69 -77.64,-80.721 -77.64,-91.752 -77.64,-102.783 -77.64,-113.814 -77.64,-124.845 -77.64,-135.876 -77.64,-146.90699999999998 -77.64,-157.938 -77.64,-168.969 -77.64,180 -77.64,179.02100000000002 -77.64,178.042 -77.64,177.063 -77.64,176.084 -77.64,175.10500000000002 -77.64,174.126 -77.64,173.147 -77.64,172.168 -77.64,171.18900000000002 -77.64,170.21 -77.64,170.21 -76.035,170.21 -74.43,170.21 -72.825,170.21 -71.22,170.21 -69.61500000000001,170.21 -68.01,170.21 -66.405,170.21 -64.8,170.21 -63.195,170.21 -61.59,171.18900000000002 -61.59,172.168 -61.59,173.147 -61.59,174.126 -61.59,175.10500000000002 -61.59,176.084 -61.59,177.063 -61.59,178.042 -61.59,179.02100000000002 -61.59,-180 -61.59))"], "date_created": "Tue, 09 Jan 2024 00:00:00 GMT", "description": "This data set contains measurements of nitrogen (\u03b415N) stable isotope values of twelve individual amino acids from modern and excavated eggshell of Ad\u00e9lie penguins (Pygoscelis adelidae) from multiple sites around the Antarctic Peninsula and Ross Sea regions of Antarctica. Stable isotope analyses were conducted using a gas chromatograph coupled to a continuous flow stable isotope ratio mass spectrometer. Radiocarbon dates of excavated eggshells were estimated using accelerator Mass Spectrometry (AMS) on bone, feather, and egg membrane tissues from the same ornithogenic layer as the eggshell and were completed at the Rafter Radiocarbon Laboratory and New Zealand (NZA), Beta Analytic, Inc. (Beta). All dates were corrected for the marine carbon reservoir effect and calibrated to calendar years before present (cal years BP) using a \u0394R of 750\u2009\u00b1\u200950 years and the MARINE13 calibration curve in Calib 7.0 (2\u03c3 range). \r\n\r\nThis data set indexes each individually analyzed eggshell sample with site (location), latitude, longitude, tissue used from radiocarbon dating, age of the sample, and nitrogen stable isotope values of individual amino acids. Details of the data set and all relevant methods are provided in Michelson et al. 2023 Limnol. Oceanogr. DOI:10.1002/lno.12446", "east": 170.21, "geometry": ["POINT(-129.74 -69.61500000000001)"], "keywords": "Adelie Penguin; Amino Acids; Antarctica; Antarctic Peninsula; Ross Sea; Stable Isotope Analysis; Trophic Position", "locations": "Ross Sea; Antarctic Peninsula; Antarctica", "north": -61.59, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "Michelson, Chantel; Polito, Michael; Wonder, Michael; McCarthy, Matthew; Patterson, William; McMahon, Kelton; Emslie, Steven D.", "project_titles": "Collaborative Research: Investigating Holocene Shifts in the Diets and Paleohistory of Antarctic Krill Predators", "projects": [{"proj_uid": "p0010047", "repository": "USAP-DC", "title": "Collaborative Research: Investigating Holocene Shifts in the Diets and Paleohistory of Antarctic Krill Predators"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.64, "title": "Amino acid nitrogen isotope values of modern and ancient Ad\u00e9lie penguin eggshells from the Ross Sea and Antarctic Peninsula regions", "uid": "601760", "west": -69.69}, {"awards": "1851022 Fudge, Tyler", "bounds_geometry": ["POINT(123.33 -75.09)"], "date_created": "Fri, 22 Dec 2023 00:00:00 GMT", "description": "Volcanic deposition of sulfuric acid in ice cores is important both for understanding past volcanic activity and for synchronizing ice core timescales. Sulfuric acid has a low eutectic point, so it can potentially exist in liquid at grain boundaries and veins, accelerating chemical diffusion. A high effective diffusivity would allow post-depositional diffusion to obscure the climate history and the peak matching among older portions of ice cores. Here, we use records of sulfate from the EPICA Dome C (EDC) ice core to estimate the effective diffusivity of sulfuric acid in ice. We focus on EDC because multiple glacial-interglacial cycles are preserved, allowing analysis for long timescales and deposition in similar climates. We calculate the mean concentration gradient and the width of prominent volcanic events, and analyze the evolution of each with depth/age. We find the effective diffusivities for interglacials and glacial maximums to be 5 \u00b1 3 \u00d7 10-9 m2 a-1, an order of magnitude lower than a previous estimate derived from the Holocene portion of EDC (Barnes et al., 2003). The effective diffusivity may be even smaller if the bias from artificial smoothing from the sampling is accounted for. Effective diffusivity is not obviously affected by the ice temperature until about -10\u00b0C, 3000m depth, which is also where anomalous sulfate peaks begin to be observed (Traversi et al., 2009). Low effective diffusivity suggests that sulfuric acid is not readily diffusing in liquid-like veins in the upper portions of the Antarctic ice sheet and that records may be preserved in deep, old ice if the ice temperature remains well below the pressure melting point.", "east": 123.33, "geometry": ["POINT(123.33 -75.09)"], "keywords": "Antarctica", "locations": "Antarctica", "north": -75.09, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Fudge, T. J.; Severi, Mirko", "project_titles": "Collaborative Research: The Impact of Impurities and Stress State on Polycrystalline Ice Deformation", "projects": [{"proj_uid": "p0010211", "repository": "USAP-DC", "title": "Collaborative Research: The Impact of Impurities and Stress State on Polycrystalline Ice Deformation"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "COLDEX", "south": -75.09, "title": "EPICA Dome C Sulfate Data 7-3190m", "uid": "601759", "west": 123.33}, {"awards": "2013987 Zoet, Lucas", "bounds_geometry": null, "date_created": "Wed, 13 Dec 2023 00:00:00 GMT", "description": "This dataset contains AMS results and microstructure analysis from different depths within the sheared till.", "east": null, "geometry": null, "keywords": "Antarctica", "locations": "Antarctica", "north": null, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Zoet, Lucas", "project_titles": "Collaborative Research: Freeze-on of Subglacial Sediments in Experiments and Theory", "projects": [{"proj_uid": "p0010434", "repository": "USAP-DC", "title": "Collaborative Research: Freeze-on of Subglacial Sediments in Experiments and Theory"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Ring shear bed deformation measurements", "uid": "601757", "west": null}, {"awards": "2013987 Zoet, Lucas", "bounds_geometry": null, "date_created": "Thu, 30 Nov 2023 00:00:00 GMT", "description": "This dataset comes from a ring shear device and is a series of values measured from the device including shear resistance as the fringe is growing", "east": null, "geometry": null, "keywords": "Antarctica", "locations": "Antarctica", "north": null, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Zoet, Lucas", "project_titles": "Collaborative Research: Freeze-on of Subglacial Sediments in Experiments and Theory", "projects": [{"proj_uid": "p0010434", "repository": "USAP-DC", "title": "Collaborative Research: Freeze-on of Subglacial Sediments in Experiments and Theory"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Frozen fringe friction", "uid": "601756", "west": null}, {"awards": "2032473 Kurbatov, Andrei; 2032463 Talghader, Joseph", "bounds_geometry": null, "date_created": "Thu, 30 Nov 2023 00:00:00 GMT", "description": "This dataset includes visible-light and thermal imaging video of tap-water ice being cut with millisecond-range pulses of 1070 nm laser light, as well as stable isotope and chemical (commonly-used ion species) composition data of ice samples frozen from Fiji bottled water and South Pole 1980 meltwater. ", "east": null, "geometry": null, "keywords": "Antarctica; Sampling", "locations": "Antarctica", "north": null, "nsf_funding_programs": "Antarctic Instrumentation and Facilities; Antarctic Instrumentation and Facilities", "persons": "Mah, Merlin; Kurbatov, Andrei V.; Talghader, Joseph", "project_titles": "Collaborative Research: Laser Cutting Technology for Borehole Sampling", "projects": [{"proj_uid": "p0010218", "repository": "USAP-DC", "title": "Collaborative Research: Laser Cutting Technology for Borehole Sampling"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Visual, thermal, chemical, and stable isotope effects of near-infrared laser cutting on freezer ice", "uid": "601753", "west": null}, {"awards": "2023303 Purkey, Sarah", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Tue, 31 Oct 2023 00:00:00 GMT", "description": "A global CFC Data product is derived used the Time-Corrected Method (TCM) in order to estimate CFCs and SF6 ocean concentration back to 1940. The Green\u0027s functions (GFs), describing the steady-state transport from the surface to the ocean interior, is solved, constrained by observations. From the GFs, we reconstruct global tracer concentrations (and associated uncertainties) in the ocean interior at annual resolution (1940\u20132021). The spatial resolution includes 50 neutral density levels that span the water column along World Ocean Circulation Experiment/Global Ocean Ship-Based Hydrographic Investigations Program lines. ", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; CFCs; GLODAP; Ocean Model; Ocean Ventilation; Southern Ocean", "locations": "Southern Ocean; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Cimoli, Laura; Purkey, Sarah; Gebbie, Jack", "project_titles": "Collaborative Research: The Antarctic Circumpolar Current: A Conduit or Blender of Antarctic Bottom Waters?", "projects": [{"proj_uid": "p0010220", "repository": "USAP-DC", "title": "Collaborative Research: The Antarctic Circumpolar Current: A Conduit or Blender of Antarctic Bottom Waters?"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Ocean CFC reconstructed data product", "uid": "601752", "west": -180.0}, {"awards": "0538657 Severinghaus, Jeffrey", "bounds_geometry": ["POINT(-112.05 -79.28)"], "date_created": "Fri, 20 Oct 2023 00:00:00 GMT", "description": "Major gas components of air data set, containing d15N, d18O of O2, dO2/N2, and dAr/N2 from the WAIS Divide ice core at high resolution. These data are used to constrain surface temperature, biosphere oxygen cycling, and firn thickness through the past \u003e60 kyr.", "east": -112.05, "geometry": ["POINT(-112.05 -79.28)"], "keywords": "Antarctica; Delta 15N; Delta 18O; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core; Ice Core Gas Records; Ice Core Records; Isotope; Nitrogen; Nitrogen Isotopes; Oxygen; Oxygen Isotope; Snow/ice; Snow/Ice; WAIS; WAIS Divide", "locations": "WAIS Divide; Antarctica; WAIS", "north": -79.28, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Severinghaus, Jeffrey P.", "project_titles": "Nitrogen and Oxygen Gas Isotopes in the WAIS Divide Ice Core as Constraints on Chronology, Temperature, and Accumulation Rate", "projects": [{"proj_uid": "p0000036", "repository": "USAP-DC", "title": "Nitrogen and Oxygen Gas Isotopes in the WAIS Divide Ice Core as Constraints on Chronology, Temperature, and Accumulation Rate"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.28, "title": "d15N and d18O of air in the WAIS Divide ice core", "uid": "601747", "west": -112.05}, {"awards": "0917509 Spencer, Matthew", "bounds_geometry": ["POINT(-149 -81)"], "date_created": "Wed, 18 Oct 2023 00:00:00 GMT", "description": "This data set consists of bubble-number densities in glacier ice, in units of bubbles per cubic centimeter, based on firn densification and grain-growth modeling under steady-state climate conditions.", "east": -149.0, "geometry": ["POINT(-149 -81)"], "keywords": "Antarctica; Density; Firn; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core; Ice Core Data; Ice Core Records; Siple Dome; Snow/ice; Snow/Ice", "locations": "Antarctica; Siple Dome", "north": -81.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Spencer, Matthew", "project_titles": "Collaborative Research: Combined Physical Property Measurements at Siple Dome", "projects": [{"proj_uid": "p0000658", "repository": "USAP-DC", "title": "Collaborative Research: Combined Physical Property Measurements at Siple Dome"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core", "south": -81.0, "title": "Firn depth and bubble density for Siple Ice Core and other sites", "uid": "601746", "west": -149.0}, {"awards": "0637004 McGwire, Kenneth", "bounds_geometry": null, "date_created": "Mon, 16 Oct 2023 00:00:00 GMT", "description": "This data set is comprised of optical images of ice core sections, acquired with a digital line-scan camera in the cold room facility at the U.S. National Ice Core Laboratory (NICL). Ice core sections are archival cuts which have rough-out rounds of ice with a single plane cut along one side. Ice sections were illuminated with fiber optic light guides connected to a 1000 watt (W) xenon light source. Original scan resolution varies from about 0.05 mm to 0.1 mm, and is documented in the metadata for each image. Images are in uncompressed Tagged Image File (.tif) form, with resolutions of 1.0 mm and 0.1 mm. Depth of image in the ice core is documented in the metadata files for each image. Data are available as .tif image files. Supporting information is available as ASCII text files (.txt), and other file formats readable with a freely available image processing program, IceImageJ. \r\n(Dataset was transferred from NSIDC without much metadata information)", "east": null, "geometry": null, "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Data; Ice Core Records; Snow/ice; Snow/Ice", "locations": "Antarctica", "north": null, "nsf_funding_programs": "Antarctic Glaciology", "persons": "McGwire, Kenneth C.", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": null, "title": "Ice core image analyses by McGwire site 91 and site 93", "uid": "601745", "west": null}, {"awards": null, "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Fri, 13 Oct 2023 00:00:00 GMT", "description": "Blue-ice areas (BIAs) and their geographical distribution in Antarctica were mapped using Landsat-7 ETM+ images with 15 m spatial resolution obtained during the 1999\u20132003 austral summers and covering the area north of 82.5\u00b0 S, and a snow grain-size image of the MODIS-based Mosaic of Antarctica (MOA) dataset with 125 m grid spacing acquired during the 2003/04 austral summer from 82.5\u00b0S to the South Pole. A map of BIAs was created with algorithms of thresholds based on band ratio and reflectance for ETM+ data and thresholds based on snow grain size for the MOA dataset. The underlying principle is that blue ice can be separated from snow or rock by their spectral discrepancies and by different grain sizes of snow and ice. We estimate the total area of BIAs in Antarctica during the data acquisition period is 234 549 km2, or 1.67% of the area of the continent. Blue ice is scattered widely over the continent but is generally located in coastal or mountainous regions. The BIA dataset presented in this study is the first map covering the entire Antarctic continent sourced solely from ETM+ and MODIS data. Support by National Natural Science Foundation of China (grant No. 41106157) and NASA grant NNX10AL42G (nsidc0549_hui_V0).", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Blue Ice; GIS; Glaciology; LANDSAT; MODIS; Remote Sensing; Snow/ice; Snow/Ice", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": null, "persons": "Hui, Fengming; Scambos, Ted", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -90.0, "title": "Distribution of blue ice areas in Antarctica derived from Landsat ETM+ and Modis images", "uid": "601742", "west": -180.0}, {"awards": "1043092 Steig, Eric", "bounds_geometry": ["POINT(-112.05 -79.28)"], "date_created": "Fri, 13 Oct 2023 00:00:00 GMT", "description": "This data set contains the final Discrete WAIS ice core WDC06A Methane (CH4) data. The data have been transferred from NSIDC (nsidc0631_sowers) with minimal metadata.", "east": -112.05, "geometry": ["POINT(-112.05 -79.28)"], "keywords": "Antarctica; Ch4; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core; Ice Core Records; Methane; WAIS", "locations": "Antarctica; WAIS; WAIS", "north": -79.28, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Sowers, Todd A.; Brook, Edward J.", "project_titles": "Collaborative Research: Stable Isotopes of Ice in the Transition and Glacial Sections of the WAIS Divide Deep Ice Core", "projects": [{"proj_uid": "p0000078", "repository": "USAP-DC", "title": "Collaborative Research: Stable Isotopes of Ice in the Transition and Glacial Sections of the WAIS Divide Deep Ice Core"}, {"proj_uid": "p0000010", "repository": "USAP-DC", "title": "Collaborative Research: Stable Isotopes of Ice in the Transition and Glacial Sections of the WAIS Divide Deep Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.28, "title": "WAIS Divide Ice Core Discrete CH4 (80-3403m)", "uid": "601741", "west": -112.05}, {"awards": "1149085 Bassis, Jeremy", "bounds_geometry": ["POLYGON((66 -68,66.9 -68,67.8 -68,68.7 -68,69.6 -68,70.5 -68,71.4 -68,72.3 -68,73.2 -68,74.1 -68,75 -68,75 -68.6,75 -69.2,75 -69.8,75 -70.4,75 -71,75 -71.6,75 -72.2,75 -72.8,75 -73.4,75 -74,74.1 -74,73.2 -74,72.3 -74,71.4 -74,70.5 -74,69.6 -74,68.7 -74,67.8 -74,66.9 -74,66 -74,66 -73.4,66 -72.8,66 -72.2,66 -71.6,66 -71,66 -70.4,66 -69.8,66 -69.2,66 -68.6,66 -68))"], "date_created": "Fri, 13 Oct 2023 00:00:00 GMT", "description": "This dataset contains a time series of rift length change for a set of 78 rifts in 13 ice shelves and a time series of rift lengths for 5 rifts in the Amery Ice Shelf for the period 2002-2015.\r\n(This dataset has been transfered from NSIDC (nsidc0652)", "east": 75.0, "geometry": ["POINT(70.5 -71)"], "keywords": "Amery Ice Shelf; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Shelf; MODIS", "locations": "Amery Ice Shelf; Antarctica; Amery Ice Shelf", "north": -68.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Bassis, Jeremy; Walker, Catherine", "project_titles": "CAREER: Bound to Improve - Improved Estimates of the Glaciological Contribution to Sea Level Rise", "projects": [{"proj_uid": "p0010437", "repository": "USAP-DC", "title": "CAREER: Bound to Improve - Improved Estimates of the Glaciological Contribution to Sea Level Rise"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -74.0, "title": "Antarctic Ice Shelf Rift Propagation Rates", "uid": "601740", "west": 66.0}, {"awards": null, "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Fri, 13 Oct 2023 00:00:00 GMT", "description": "This data set contains the VSMOW-SLAP d170, d180, and 170-excess data from the WAIS Divide Ice Core Project, Siple Dome and Taylor Dome, along with the published and VSMOW-SLAP normalized d170, d180, and 170-excess for Vostok [Landais et al.2008], EPICA Dome C and Talos Dome [Wrinkler et al.,2012]. The data cover the Last Glacial Maximum (25-20 ka), through the Early Holocene (12-9 ka) and into present-day (past 2 kyr).", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Delta 18O; Delta O-17; Epica Dome C; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Siple Dome; Talos Dome; Taylor Dome; Vostok", "locations": "Talos Dome; Siple Dome; Taylor Dome; Talos Dome; Epica Dome C; Vostok; Antarctica; Siple Dome; Taylor Dome; Epica Dome C", "north": -60.0, "nsf_funding_programs": null, "persons": "Steig, Eric J.; Schoenemann, Spruce", "project_titles": null, "projects": null, "repositories": null, "science_programs": "WAIS Divide Ice Core", "south": -90.0, "title": "VSMOW-SLAP d170, d180, and 17O-excess data from WAIS Divide Ice Core Project, Siple Dome and Taylor Dome", "uid": "601743", "west": -180.0}, {"awards": "1744649 Christianson, Knut", "bounds_geometry": ["POLYGON((-110.338 -85.76,-109.5454 -85.76,-108.7528 -85.76,-107.9602 -85.76,-107.1676 -85.76,-106.375 -85.76,-105.5824 -85.76,-104.7898 -85.76,-103.9972 -85.76,-103.2046 -85.76,-102.412 -85.76,-102.412 -85.8266,-102.412 -85.89320000000001,-102.412 -85.9598,-102.412 -86.02640000000001,-102.412 -86.093,-102.412 -86.1596,-102.412 -86.2262,-102.412 -86.2928,-102.412 -86.35940000000001,-102.412 -86.426,-103.2046 -86.426,-103.9972 -86.426,-104.7898 -86.426,-105.5824 -86.426,-106.375 -86.426,-107.1676 -86.426,-107.9602 -86.426,-108.7528 -86.426,-109.5454 -86.426,-110.338 -86.426,-110.338 -86.35940000000001,-110.338 -86.2928,-110.338 -86.2262,-110.338 -86.1596,-110.338 -86.093,-110.338 -86.02640000000001,-110.338 -85.9598,-110.338 -85.89320000000001,-110.338 -85.8266,-110.338 -85.76))"], "date_created": "Mon, 09 Oct 2023 00:00:00 GMT", "description": "Phase-sensitive radar data collected at Hercules Dome, Antarctica. These data are processed in two ways for two separate objectives. First, repeat acquisitions between years are interfered to interpret vertical velocity. Second, polarized acquisitions are interfered to interpret crystal orientation fabric. The full processing flow is included to recreate the given data products from the included raw data.", "east": -102.412, "geometry": ["POINT(-106.375 -86.093)"], "keywords": "Antarctica; Apres; Crystal Orientation Fabric; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Hercules Dome; Ice Dynamic; Ice Penetrating Radar; Radar Interferometry; Radar Polarimetry", "locations": "Hercules Dome; Antarctica", "north": -85.76, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Hills, Benjamin; Holschuh, Nicholas; Hoffman, Andrew; Fudge, Tyler J; Horlings, Annika; Erwin, Emma; Steig, Eric J.; Christianson, Knut", "project_titles": "Ice Dynamics at the Intersection of the West and East Antarctic Ice Sheets", "projects": [{"proj_uid": "p0010359", "repository": "USAP-DC", "title": "Ice Dynamics at the Intersection of the West and East Antarctic Ice Sheets"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Hercules Dome Ice Core", "south": -86.426, "title": "Hercules Dome ApRES Data", "uid": "601739", "west": -110.338}, {"awards": "1745078 Brook, Edward J.", "bounds_geometry": ["POINT(-112.05 -79.28)"], "date_created": "Thu, 05 Oct 2023 00:00:00 GMT", "description": "This dataset includes measurements of atmospheric methane from samples from the NEEM, GISP2 and WAIS Divide ice cores. All measurements were made at the Oregon State University Ice Core and Quaternary Geochemistry Laboratory (Corvallis, OR) using an established analytical system. 433 samples from the NEEM ice core were measured between 1420 and 1560m depths. A measurement uncertainty ranging from 2.8 to 4.2 ppb, depending on the measurement year, was determined from replicate samples. 340 samples from the GISP2 ice core were measured between 1740 and 2060m depths. A measurement uncertainty ranging from 3.1 to 3.4 ppb, depending on the measurement year, was determined from replicate samples. All GISP2 and NEEM data were corrected for excess methane contamination using the established relationship between excess methane and Ca2+ (Lee et al., 2020). Both corrected and uncorrected data are included in the publication. 340 samples from the GISP2 ice core were measured between 1957 and 3081m depths. A measurement uncertainty ranging from 3.1 to 3.4 ppb, depending on the measurement year, was determined from replicate samples. Depths reflect the mid-points of the depth range of each samples, which is typically ~8cm. All replicate measurements are included in the dataset.\r\n\r\nLee, J. E. et al. Excess methane in Greenland ice cores associated with high dust concentrations. Geochimica et cosmochimica acta 270, 409-430 (2020).", "east": -112.05, "geometry": ["POINT(-112.05 -79.28)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Greenland; Ice Core Records; Methane; West Antarctic Ice Sheet", "locations": "West Antarctic Ice Sheet; Antarctica; Greenland", "north": -79.28, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Riddell-Young, Benjamin; Martin, Kaden; Rosen, Julia; Lee, James; Edwards, Jon S.; Brook, Edward J.", "project_titles": "Tracing Past Methane Variations with Stable Isotopes in Antarctic Ice Cores", "projects": [{"proj_uid": "p0010416", "repository": "USAP-DC", "title": "Tracing Past Methane Variations with Stable Isotopes in Antarctic Ice Cores"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.28, "title": "Atmospheric methane across the Last Glacial Maximum and deglaciation from the GISP2, NEEM and WAIS Divide ice cores ", "uid": "601737", "west": -112.05}, {"awards": "1745078 Brook, Edward J.", "bounds_geometry": ["POINT(-112.05 -79.28)"], "date_created": "Mon, 02 Oct 2023 00:00:00 GMT", "description": "This dataset includes estimates of the atmospheric methane relative interpolar difference (rIPD) across the Last Glacial Maximum and Deglaciation. The rIPD was calculated using discrete, high-resolution methane measurements from the WAIS Divide, NEEM and GISP2 ice cores. Two independent IPD records were determined: One using NEEM and WAIS and one using GISP2 and WAIS. The dataset includes rIPD values calculated using both Greenland methane data both corrected and uncorrected for excess methane (Lee et al., 2020). The rIPD was calculated by smoothing each methane record and synchronizing them to the WD2014 gas age scale. 1-sigma rIPD uncertainties are included. This dataset also includes the output of the four-box troposphere model used to interpret the rIPD. For both excess methane-corrected records, the model output and 1-sigma uncertainty is provided for northern extratropical (30N - 90N) and total tropical (30S - 30N) sources in Tg yr-1. For the NEEM-derived rIPD, sections of the rIPD where atmospheric methane changed rapidly were deemed untrustworthy were removed from the dataset.\r\n\r\nLee, J. E. et al. Excess methane in Greenland ice cores associated with high dust concentrations. Geochimica et cosmochimica acta 270, 409-430 (2020).", "east": -112.05, "geometry": ["POINT(-112.05 -79.28)"], "keywords": "Antarctica; Greenland; Methane; Paleoclimate; West Antarctic Ice Sheet", "locations": "Greenland; West Antarctic Ice Sheet; Antarctica", "north": -79.28, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Riddell-Young, Benjamin; Rosen, Julia; Buizert, Christo; Martin, Kaden; Lee, James; Edwards, Jon S.; M\u00fchl, Michaela; Schmitt, Jochen; Fischer, Hubertus; Blunier, Thomas; Brook, Edward J.", "project_titles": "Tracing Past Methane Variations with Stable Isotopes in Antarctic Ice Cores", "projects": [{"proj_uid": "p0010416", "repository": "USAP-DC", "title": "Tracing Past Methane Variations with Stable Isotopes in Antarctic Ice Cores"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.28, "title": "Atmospheric methane interpolar difference and four-box troposphere model output across the Last Glacial Maximum and Deglaciation", "uid": "601736", "west": -112.05}, {"awards": "2138277 Gallagher, Katherine", "bounds_geometry": ["POLYGON((-90 -55,-85.5 -55,-81 -55,-76.5 -55,-72 -55,-67.5 -55,-63 -55,-58.5 -55,-54 -55,-49.5 -55,-45 -55,-45 -57.5,-45 -60,-45 -62.5,-45 -65,-45 -67.5,-45 -70,-45 -72.5,-45 -75,-45 -77.5,-45 -80,-49.5 -80,-54 -80,-58.5 -80,-63 -80,-67.5 -80,-72 -80,-76.5 -80,-81 -80,-85.5 -80,-90 -80,-90 -77.5,-90 -75,-90 -72.5,-90 -70,-90 -67.5,-90 -65,-90 -62.5,-90 -60,-90 -57.5,-90 -55))"], "date_created": "Wed, 13 Sep 2023 00:00:00 GMT", "description": "These data represent simulated buoyant debris released along the West Antarctic Peninsula. Files include latitude, longitude, and depth of particles released along the West Antarctic Peninsula within the Regional Ocean Modeling System (ROMS) framework. Data currently cover 4 austral summers: 2008, 2009, 2018, and 2019. A total of 12 simulations were conducted, simulating debris fields from 4 potential sources: non-point sources, tourism, fishing, and research.", "east": -45.0, "geometry": ["POINT(-67.5 -67.5)"], "keywords": "Antarctica; Modeling; Regional Ocean Modeling System; West Antarctic Shelf", "locations": "West Antarctic Shelf; Antarctica", "north": -55.0, "nsf_funding_programs": "Post Doc/Travel", "persons": "Gallagher, Katherine", "project_titles": "OPP-PRF Pygoscelis Penguin Response to Potential Prey Retention along the West Antarctic Peninsula", "projects": [{"proj_uid": "p0010349", "repository": "USAP-DC", "title": "OPP-PRF Pygoscelis Penguin Response to Potential Prey Retention along the West Antarctic Peninsula"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.0, "title": "Simulated marine debris trajectories along the West Antarctic Peninsula in 2008-2009 and 2018-2019", "uid": "601734", "west": -90.0}, {"awards": null, "bounds_geometry": ["POLYGON((-156 -82.5,-155.9 -82.5,-155.8 -82.5,-155.7 -82.5,-155.6 -82.5,-155.5 -82.5,-155.4 -82.5,-155.3 -82.5,-155.2 -82.5,-155.1 -82.5,-155 -82.5,-155 -82.53,-155 -82.56,-155 -82.59,-155 -82.62,-155 -82.65,-155 -82.67999999999999,-155 -82.71,-155 -82.74,-155 -82.77,-155 -82.8,-155.1 -82.8,-155.2 -82.8,-155.3 -82.8,-155.4 -82.8,-155.5 -82.8,-155.6 -82.8,-155.7 -82.8,-155.8 -82.8,-155.9 -82.8,-156 -82.8,-156 -82.77,-156 -82.74,-156 -82.71,-156 -82.67999999999999,-156 -82.65,-156 -82.62,-156 -82.59,-156 -82.56,-156 -82.53,-156 -82.5))"], "date_created": "Tue, 12 Sep 2023 00:00:00 GMT", "description": "Contained in this folder are the raw and processed data files for data collected with the underwater robot Icefin in the ocean cavity beneath Ross Ice Shelf, near the grounding line of Kamb Ice Stream. Most of these data are located within a basal crevasse. They were collected in December 2019 as part of the Aotearoa New Zealand Antarctic Science Platform and Victoria University of Wellington Hot Water Drilling initiative, and the NASA RISEUP grant (NNX16AL07G, PI B. E. Schmidt). The code that converted raw data files to processed can be found at https://zenodo.org/record/8338529. Direct questions to Peter Washam at pwasham@cornell.edu.", "east": -155.0, "geometry": ["POINT(-155.5 -82.65)"], "keywords": "Antarctica; Basal Crevassing; Basal Freezing; Basal Melting; Ice Shelf; Kamb Ice Stream; Oceanography", "locations": "Kamb Ice Stream; Antarctica", "north": -82.5, "nsf_funding_programs": null, "persons": "Washam, Peter", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -82.8, "title": "Direct observations of melting, freezing, and ocean circulation in an ice shelf basal crevasse", "uid": "601733", "west": -156.0}, {"awards": "1543383 Postlethwait, John; 1947040 Postlethwait, John; 2232891 Postlethwait, John", "bounds_geometry": ["POLYGON((-180 -37,-144 -37,-108 -37,-72 -37,-36 -37,0 -37,36 -37,72 -37,108 -37,144 -37,180 -37,180 -42.3,180 -47.6,180 -52.9,180 -58.2,180 -63.5,180 -68.8,180 -74.1,180 -79.4,180 -84.69999999999999,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -84.7,-180 -79.4,-180 -74.1,-180 -68.8,-180 -63.5,-180 -58.2,-180 -52.9,-180 -47.6,-180 -42.300000000000004,-180 -37))"], "date_created": "Fri, 08 Sep 2023 00:00:00 GMT", "description": "Phylogenetic tree of Notothenioid species used in analyses and results of the HyPhy RELAX tests for pervasive changes in strength of natural selection on hemoglobin genes in the research article \u201cCold-driven hemoglobin evolution in Antarctic notothenioid fishes prior to hemoglobin gene loss in white-blooded icefishes\u201d by Thomas Desvignes, Iliana Bista, Karina Herrera, Audrey Landes, John H. 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Postlethwait.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Cold Adaptation; Cryonotothenioid; Dragonfish; Eleginopsioidea; Fish; Genetic Analysis; Hemoglobin; Icefish; Notothenioid; Notothenioid Fishes; Plunderfish; Sub-Antarctic", "locations": "Sub-Antarctic; Antarctica", "north": -37.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "Desvignes, Thomas; Postlethwait, John", "project_titles": "Evolution of hemoglobin genes in notothenioid fishes", "projects": [{"proj_uid": "p0010417", "repository": "USAP-DC", "title": "Evolution of hemoglobin genes in notothenioid fishes"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "MEME tests of sites evolving under episodic diversifying selection in notothenioid hemoglobin genes.", "uid": "601730", "west": -180.0}, {"awards": "2232891 Postlethwait, John; 1543383 Postlethwait, John; 1947040 Postlethwait, John", "bounds_geometry": ["POLYGON((-180 -37,-144 -37,-108 -37,-72 -37,-36 -37,0 -37,36 -37,72 -37,108 -37,144 -37,180 -37,180 -42.3,180 -47.6,180 -52.9,180 -58.2,180 -63.5,180 -68.8,180 -74.1,180 -79.4,180 -84.69999999999999,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -84.7,-180 -79.4,-180 -74.1,-180 -68.8,-180 -63.5,-180 -58.2,-180 -52.9,-180 -47.6,-180 -42.300000000000004,-180 -37))"], "date_created": "Fri, 08 Sep 2023 00:00:00 GMT", "description": "Results of hemoglobin gene KaKs (dN/dS) analyses in notothenioids in the research article \u201cCold-driven hemoglobin evolution in Antarctic notothenioid fishes prior to hemoglobin gene loss in white-blooded icefishes\u201d by Thomas Desvignes, Iliana Bista, Karina Herrera, Audrey Landes, John H. Postlethwait.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Cold Adaptation; Cryonotothenioid; Dragonfish; Eleginopsioidea; Fish; Genetic Analysis; Hemoglobin; Icefish; Notothenioid; Notothenioid Fishes; Plunderfish; Sub-Antarctic", "locations": "Sub-Antarctic; Antarctica", "north": -37.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "Desvignes, Thomas; Postlethwait, John", "project_titles": "Evolution of hemoglobin genes in notothenioid fishes", "projects": [{"proj_uid": "p0010417", "repository": "USAP-DC", "title": "Evolution of hemoglobin genes in notothenioid fishes"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Rates of hemoglobin evolution among genes and across notothenioid species.", "uid": "601729", "west": -180.0}, {"awards": "1543383 Postlethwait, John; 2232891 Postlethwait, John; 1947040 Postlethwait, John", "bounds_geometry": ["POLYGON((-180 -37,-144 -37,-108 -37,-72 -37,-36 -37,0 -37,36 -37,72 -37,108 -37,144 -37,180 -37,180 -42.3,180 -47.6,180 -52.9,180 -58.2,180 -63.5,180 -68.8,180 -74.1,180 -79.4,180 -84.69999999999999,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -84.7,-180 -79.4,-180 -74.1,-180 -68.8,-180 -63.5,-180 -58.2,-180 -52.9,-180 -47.6,-180 -42.300000000000004,-180 -37))"], "date_created": "Fri, 08 Sep 2023 00:00:00 GMT", "description": "Phylogenetic tree of Notothenioid species used in analyses and results of the HyPhy aBSREL tests for diversifying selection in notothenioid hemoglobin genes in the research article \u201cCold-driven hemoglobin evolution in Antarctic notothenioid fishes prior to hemoglobin gene loss in white-blooded icefishes\u201d by Thomas Desvignes, Iliana Bista, Karina Herrera, Audrey Landes, John H. Postlethwait.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Cold Adaptation; Cryonotothenioid; Dragonfish; Eleginopsioidea; Fish; Gene; Genetic Analysis; Hemoglobin; Icefish; Notothenioid; Notothenioid Fishes; Plunderfish; Sub-Antarctic", "locations": "Antarctica; Sub-Antarctic; Antarctica", "north": -37.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "Desvignes, Thomas; Postlethwait, John", "project_titles": "Evolution of hemoglobin genes in notothenioid fishes", "projects": [{"proj_uid": "p0010417", "repository": "USAP-DC", "title": "Evolution of hemoglobin genes in notothenioid fishes"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "aBSREL tests for episodic diversifying selection on hemoglobin genes in notothenioids.", "uid": "601728", "west": -180.0}, {"awards": "1744871 Robinson, Rebecca", "bounds_geometry": null, "date_created": "Wed, 30 Aug 2023 00:00:00 GMT", "description": "This dataset is the results of 3 experiments in which the spore-forming diatom Chaetoceros socialis was grown in culture and induced into resting spores by nitrate limitation. The nitrogen isotopic composition of accumulated biomass (\u03b415Nbiomass; \u2030 vs air) and of diatom-bound organic N (\u03b415Ndb; \u2030 vs air) are reported at two timepoints from each experiment: prior to and after resting spore formation. Experiments 1 and 2 provide measurements for CRS mixed with vegetative Chaetoceros cells, while Experiment 3 provides measurements for isolated CRS. Fluorescence and nitrate concentration was tracked throughout each experiment, with dissolved silica, ammonium, and total reduced nitrogen also measured in Experiment 3.", "east": null, "geometry": null, "keywords": "Antarctica", "locations": "Antarctica; Antarctica", "north": null, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Dove, Isabel", "project_titles": "The nitrogen isotopic composition of diatom resting spores in Southern Ocean sediments: A source of bias and/or paleoenvironmental information?", "projects": [{"proj_uid": "p0010234", "repository": "USAP-DC", "title": "The nitrogen isotopic composition of diatom resting spores in Southern Ocean sediments: A source of bias and/or paleoenvironmental information?"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Dissolved nutrients, cell counts, and nitrogen isotope measurements from Chaetoceros socialis culture experiments", "uid": "601727", "west": null}, {"awards": "1744584 Klein, Andrew; 1744550 Amsler, Charles; 1744570 Galloway, Aaron; 1744602 Iken, Katrin", "bounds_geometry": ["POLYGON((-67.77137 -64.77195,-67.3795463 -64.77195,-66.9877226 -64.77195,-66.59589890000001 -64.77195,-66.2040752 -64.77195,-65.8122515 -64.77195,-65.4204278 -64.77195,-65.0286041 -64.77195,-64.6367804 -64.77195,-64.2449567 -64.77195,-63.853133 -64.77195,-63.853133 -65.16396350000001,-63.853133 -65.555977,-63.853133 -65.9479905,-63.853133 -66.34000400000001,-63.853133 -66.73201750000001,-63.853133 -67.124031,-63.853133 -67.5160445,-63.853133 -67.90805800000001,-63.853133 -68.3000715,-63.853133 -68.692085,-64.2449567 -68.692085,-64.6367804 -68.692085,-65.0286041 -68.692085,-65.4204278 -68.692085,-65.8122515 -68.692085,-66.2040752 -68.692085,-66.59589890000001 -68.692085,-66.9877226 -68.692085,-67.3795463 -68.692085,-67.77137 -68.692085,-67.77137 -68.3000715,-67.77137 -67.90805800000001,-67.77137 -67.5160445,-67.77137 -67.124031,-67.77137 -66.73201750000001,-67.77137 -66.34000400000001,-67.77137 -65.9479905,-67.77137 -65.555977,-67.77137 -65.16396350000001,-67.77137 -64.77195))"], "date_created": "Wed, 30 Aug 2023 00:00:00 GMT", "description": "This spreadsheet contains by-hand collection data by transect and depth for macroalgal species from 14 sites in the central Antarctic Peninsula. See Amsler et al. 2023 https://doi.org/10.1525/elementa.2023.00020 for a description of the sites and methodology. Data are from the \"Horizontal Transect Components\" only. ", "east": -63.853133, "geometry": ["POINT(-65.8122515 -66.73201750000001)"], "keywords": "Antarctica; Antarctic Peninsula", "locations": "Antarctica; Antarctic Peninsula", "north": -64.77195, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "Amsler, Charles", "project_titles": "Collaborative Research: Sea ice as a driver of Antarctic benthic macroalgal community composition and nearshore trophic connectivity", "projects": [{"proj_uid": "p0010104", "repository": "USAP-DC", "title": "Collaborative Research: Sea ice as a driver of Antarctic benthic macroalgal community composition and nearshore trophic connectivity"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -68.692085, "title": "Macroalgal species collected along horizontal transect components", "uid": "601725", "west": -67.77137}, {"awards": "1947040 Postlethwait, John; 1543383 Postlethwait, John; 2232891 Postlethwait, John", "bounds_geometry": ["POLYGON((-180 -37,-144 -37,-108 -37,-72 -37,-36 -37,0 -37,36 -37,72 -37,108 -37,144 -37,180 -37,180 -42.3,180 -47.6,180 -52.9,180 -58.2,180 -63.5,180 -68.8,180 -74.1,180 -79.4,180 -84.69999999999999,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -84.7,-180 -79.4,-180 -74.1,-180 -68.8,-180 -63.5,-180 -58.2,-180 -52.9,-180 -47.6,-180 -42.300000000000004,-180 -37))"], "date_created": "Thu, 24 Aug 2023 00:00:00 GMT", "description": "All input and output files of the phylogenetic trees of hemoglobin proteins in Notothenioids from the study \"Cold-driven hemoglobin evolution in Antarctic notothenioid fishes prior to hemoglobin gene loss in white-blooded icefishes\" by Thomas Desvignes, Iliana Bista, Karina Herrera, Audrey Landes, and John H. Postlethwait.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Cold Adaptation; Cryonotothenioid; Dragonfish; Eleginopsioidea; Fish; Gene; Hemoglobin; Icefish; Notothenioid; Plunderfish; Sub-Antarctic", "locations": "Sub-Antarctic; Antarctica", "north": -37.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "Desvignes, Thomas; Postlethwait, John", "project_titles": "Evolution of hemoglobin genes in notothenioid fishes", "projects": [{"proj_uid": "p0010417", "repository": "USAP-DC", "title": "Evolution of hemoglobin genes in notothenioid fishes"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Phylogenetic trees of hemoglobin proteins in notothenioids from the study \"Cold-driven hemoglobin evolution in Antarctic notothenioid fishes prior to hemoglobin gene loss in white-blooded icefishes\"", "uid": "601722", "west": -180.0}, {"awards": "1947040 Postlethwait, John; 2232891 Postlethwait, John; 1543383 Postlethwait, John", "bounds_geometry": ["POLYGON((-180 -37,-144 -37,-108 -37,-72 -37,-36 -37,0 -37,36 -37,72 -37,108 -37,144 -37,180 -37,180 -42.3,180 -47.6,180 -52.9,180 -58.2,180 -63.5,180 -68.8,180 -74.1,180 -79.4,180 -84.69999999999999,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -84.7,-180 -79.4,-180 -74.1,-180 -68.8,-180 -63.5,-180 -58.2,-180 -52.9,-180 -47.6,-180 -42.300000000000004,-180 -37))"], "date_created": "Thu, 24 Aug 2023 00:00:00 GMT", "description": "Phylogenetic tree of 36 notothenioid species and five outgroup used throughout the study \"Cold-driven hemoglobin evolution in Antarctic notothenioid fishes prior to hemoglobin gene loss in white-blooded icefishes\" by Thomas Desvignes, Iliana Bista, Karina Herrera, Audrey Landes, John H. 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However, each experiment differs in its treatment of rift-flank boundary processes, which affects the rift path.\r\n\r\nFor more information, see the associated publication (Huth et al., 2023).", "east": -60.0, "geometry": ["POINT(-63.5 -68)"], "keywords": "Antarctica; Glaciology; Iceberg; Ice Shelf Dynamics; Larsen C Ice Shelf; Model Data; Modeling", "locations": "Larsen C Ice Shelf; Antarctica", "north": -66.0, "nsf_funding_programs": "Post Doc/Travel", "persons": "Huth, Alexander", "project_titles": "OPP-PRF Calving, Icebergs, and Climate", "projects": [{"proj_uid": "p0010276", "repository": "USAP-DC", "title": "OPP-PRF Calving, Icebergs, and Climate"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -70.0, "title": "Simulations of ice-shelf rifting on Larsen C Ice Shelf", "uid": "601718", "west": -67.0}, {"awards": "1753101 Bernard, Kim", "bounds_geometry": ["POLYGON((-64 -64,-63.6 -64,-63.2 -64,-62.8 -64,-62.4 -64,-62 -64,-61.6 -64,-61.2 -64,-60.8 -64,-60.4 -64,-60 -64,-60 -64.1,-60 -64.2,-60 -64.3,-60 -64.4,-60 -64.5,-60 -64.6,-60 -64.7,-60 -64.8,-60 -64.9,-60 -65,-60.4 -65,-60.8 -65,-61.2 -65,-61.6 -65,-62 -65,-62.4 -65,-62.8 -65,-63.2 -65,-63.6 -65,-64 -65,-64 -64.9,-64 -64.8,-64 -64.7,-64 -64.6,-64 -64.5,-64 -64.4,-64 -64.3,-64 -64.2,-64 -64.1,-64 -64))"], "date_created": "Fri, 28 Jul 2023 00:00:00 GMT", "description": "", "east": -60.0, "geometry": ["POINT(-62 -64.5)"], "keywords": "Antarctica; 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Antarctic Krill; Palmer Station; Winter", "locations": "Antarctica; Palmer Station", "north": -64.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Bernard, Kim", "project_titles": "CAREER: \"The Omnivore\u0027s Dilemma\": The Effect of Autumn Diet on Winter Physiology and Condition of Juvenile Antarctic Krill", "projects": [{"proj_uid": "p0010124", "repository": "USAP-DC", "title": "CAREER: \"The Omnivore\u0027s Dilemma\": The Effect of Autumn Diet on Winter Physiology and Condition of Juvenile Antarctic Krill"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.0, "title": "2019 Krill Carbon Content", "uid": "601709", "west": -64.0}, {"awards": "1753101 Bernard, Kim", "bounds_geometry": ["POLYGON((-64 -64,-63.6 -64,-63.2 -64,-62.8 -64,-62.4 -64,-62 -64,-61.6 -64,-61.2 -64,-60.8 -64,-60.4 -64,-60 -64,-60 -64.1,-60 -64.2,-60 -64.3,-60 -64.4,-60 -64.5,-60 -64.6,-60 -64.7,-60 -64.8,-60 -64.9,-60 -65,-60.4 -65,-60.8 -65,-61.2 -65,-61.6 -65,-62 -65,-62.4 -65,-62.8 -65,-63.2 -65,-63.6 -65,-64 -65,-64 -64.9,-64 -64.8,-64 -64.7,-64 -64.6,-64 -64.5,-64 -64.4,-64 -64.3,-64 -64.2,-64 -64.1,-64 -64))"], "date_created": "Fri, 28 Jul 2023 00:00:00 GMT", "description": "", "east": -60.0, "geometry": ["POINT(-62 -64.5)"], "keywords": "Abundance; Antarctica; Antarctic Krill", "locations": "Antarctica", "north": -64.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Bernard, Kim", "project_titles": "CAREER: \"The Omnivore\u0027s Dilemma\": The Effect of Autumn Diet on Winter Physiology and Condition of Juvenile Antarctic Krill", "projects": [{"proj_uid": "p0010124", "repository": "USAP-DC", "title": "CAREER: \"The Omnivore\u0027s Dilemma\": The Effect of Autumn Diet on Winter Physiology and Condition of Juvenile Antarctic Krill"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.0, "title": "Gerlache Strait Krill Demographics", "uid": "601706", "west": -64.0}, {"awards": "1745130 Moran, Amy", "bounds_geometry": ["POLYGON((166.66 -77.84,166.661 -77.84,166.662 -77.84,166.66299999999998 -77.84,166.664 -77.84,166.665 -77.84,166.666 -77.84,166.667 -77.84,166.66799999999998 -77.84,166.66899999999998 -77.84,166.67 -77.84,166.67 -77.84100000000001,166.67 -77.842,166.67 -77.843,166.67 -77.844,166.67 -77.845,166.67 -77.846,166.67 -77.847,166.67 -77.848,166.67 -77.84899999999999,166.67 -77.85,166.66899999999998 -77.85,166.66799999999998 -77.85,166.667 -77.85,166.666 -77.85,166.665 -77.85,166.664 -77.85,166.66299999999998 -77.85,166.662 -77.85,166.661 -77.85,166.66 -77.85,166.66 -77.84899999999999,166.66 -77.848,166.66 -77.847,166.66 -77.846,166.66 -77.845,166.66 -77.844,166.66 -77.843,166.66 -77.842,166.66 -77.84100000000001,166.66 -77.84))"], "date_created": "Mon, 24 Jul 2023 00:00:00 GMT", "description": "This video shows the behavior of an adult of Colossendeis megalonyx around a recently-deposited egg mass from a mating group of the same species. The egg mass is indicated by a white circle and label that appears close to the beginning of the video. The adult can be seen manipulating the egg mass with its ovigerous legs (long, with scoop at the end) and palps (shorter). Next to the adult and egg mass are two other Colossendeis in mating posture. The video was taken by Graham Lobert on November 1, 2021 on a GoPro Hero Black at a timelapse rate of one frame per second, played back at 30 fps. The egg mass is approximately three cm across the short diameter.", "east": 166.67, "geometry": ["POINT(166.665 -77.845)"], "keywords": "Antarctica; McMurdo; Pycnogonida; Sea Spider", "locations": "Antarctica; McMurdo", "north": -77.84, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Moran, Amy; Lobert, Graham", "project_titles": "Thermal Sensitivity of Antarctic Embryos and Larvae: Effects of Temperature on Metabolism, Developmental Rate, and the Metabolic Cost of Development ", "projects": [{"proj_uid": "p0010187", "repository": "USAP-DC", "title": "Thermal Sensitivity of Antarctic Embryos and Larvae: Effects of Temperature on Metabolism, Developmental Rate, and the Metabolic Cost of Development "}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.85, "title": "Video of Colossendeis megalonyx behavior around egg mass", "uid": "601716", "west": 166.66}, {"awards": "1745130 Moran, Amy", "bounds_geometry": ["POLYGON((163 -76,163.3 -76,163.6 -76,163.9 -76,164.2 -76,164.5 -76,164.8 -76,165.1 -76,165.4 -76,165.7 -76,166 -76,166 -76.2,166 -76.4,166 -76.6,166 -76.8,166 -77,166 -77.2,166 -77.4,166 -77.6,166 -77.8,166 -78,165.7 -78,165.4 -78,165.1 -78,164.8 -78,164.5 -78,164.2 -78,163.9 -78,163.6 -78,163.3 -78,163 -78,163 -77.8,163 -77.6,163 -77.4,163 -77.2,163 -77,163 -76.8,163 -76.6,163 -76.4,163 -76.2,163 -76))"], "date_created": "Mon, 24 Jul 2023 00:00:00 GMT", "description": "Measurements of the longest diameters of 17 eggs of Colossendeis megalonyx, laid on October 25 2021 and photographed on October 27 2021.", "east": 166.0, "geometry": ["POINT(164.5 -77)"], "keywords": "Antarctica; McMurdo", "locations": "McMurdo; Antarctica", "north": -76.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Moran, Amy", "project_titles": "Thermal Sensitivity of Antarctic Embryos and Larvae: Effects of Temperature on Metabolism, Developmental Rate, and the Metabolic Cost of Development ", "projects": [{"proj_uid": "p0010187", "repository": "USAP-DC", "title": "Thermal Sensitivity of Antarctic Embryos and Larvae: Effects of Temperature on Metabolism, Developmental Rate, and the Metabolic Cost of Development "}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Egg diameters of Colossendeis megalonyx", "uid": "601717", "west": 163.0}, {"awards": "1744649 Christianson, Knut", "bounds_geometry": ["POLYGON((-120 -85.5,-116.67 -85.5,-113.34 -85.5,-110.01 -85.5,-106.68 -85.5,-103.35 -85.5,-100.02000000000001 -85.5,-96.69 -85.5,-93.36 -85.5,-90.03 -85.5,-86.7 -85.5,-86.7 -85.95,-86.7 -86.4,-86.7 -86.85,-86.7 -87.3,-86.7 -87.75,-86.7 -88.2,-86.7 -88.65,-86.7 -89.1,-86.7 -89.55,-86.7 -90,-90.03 -90,-93.36 -90,-96.69 -90,-100.02 -90,-103.35 -90,-106.68 -90,-110.01 -90,-113.34 -90,-116.67 -90,-120 -90,-120 -89.55,-120 -89.1,-120 -88.65,-120 -88.2,-120 -87.75,-120 -87.3,-120 -86.85,-120 -86.4,-120 -85.95,-120 -85.5))"], "date_created": "Fri, 21 Jul 2023 00:00:00 GMT", "description": "This dataset consists of gridded basal topographies in the vicinity of Hercules Dome, East Antarctica generated from multi-element ice-penetrating radar data. ", "east": -86.7, "geometry": ["POINT(-103.35 -87.75)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Hercules Dome; Ice Penetrating Radar; Snow/ice; Snow/Ice", "locations": "Hercules Dome; Antarctica; Antarctica", "north": -85.5, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Hoffman, Andrew; Holschuh, Nicholas; Paden, John; Christianson, Knut", "project_titles": "Ice Dynamics at the Intersection of the West and East Antarctic Ice Sheets", "projects": [{"proj_uid": "p0010359", "repository": "USAP-DC", "title": "Ice Dynamics at the Intersection of the West and East Antarctic Ice Sheets"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Hercules Dome Ice Core", "south": -90.0, "title": "Hercules Dome Ice-Penetrating Radar Swath Topographies", "uid": "601711", "west": -120.0}, {"awards": "1744649 Christianson, Knut", "bounds_geometry": ["POLYGON((-120 -85.5,-116.67 -85.5,-113.34 -85.5,-110.01 -85.5,-106.68 -85.5,-103.35 -85.5,-100.02000000000001 -85.5,-96.69 -85.5,-93.36 -85.5,-90.03 -85.5,-86.7 -85.5,-86.7 -85.95,-86.7 -86.4,-86.7 -86.85,-86.7 -87.3,-86.7 -87.75,-86.7 -88.2,-86.7 -88.65,-86.7 -89.1,-86.7 -89.55,-86.7 -90,-90.03 -90,-93.36 -90,-96.69 -90,-100.02 -90,-103.35 -90,-106.68 -90,-110.01 -90,-113.34 -90,-116.67 -90,-120 -90,-120 -89.55,-120 -89.1,-120 -88.65,-120 -88.2,-120 -87.75,-120 -87.3,-120 -86.85,-120 -86.4,-120 -85.95,-120 -85.5))"], "date_created": "Thu, 20 Jul 2023 00:00:00 GMT", "description": "This dataset contains high-frequency impulse radar data collected at western Hercules Dome in East Antarctica.", "east": -86.7, "geometry": ["POINT(-103.35 -87.75)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Hercules Dome; Ice Penetrating Radar; Snow/ice; Snow/Ice", "locations": "Hercules Dome; Antarctica; Antarctica", "north": -85.5, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Hoffman, Andrew; Christianson, Knut; Hills, Benjamin; Christian, John; Holschuh, Nicholas; Horlings, Annika; O\u0027Connor, Gemma", "project_titles": "Ice Dynamics at the Intersection of the West and East Antarctic Ice Sheets", "projects": [{"proj_uid": "p0010359", "repository": "USAP-DC", "title": "Ice Dynamics at the Intersection of the West and East Antarctic Ice Sheets"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Hercules Dome Ice Core", "south": -90.0, "title": "Hercules Dome High-Frequency Impulse Ice-Penetrating Radar Data", "uid": "601710", "west": -120.0}, {"awards": "1744649 Christianson, Knut", "bounds_geometry": ["POLYGON((-120 -85.5,-116.67 -85.5,-113.34 -85.5,-110.01 -85.5,-106.68 -85.5,-103.35 -85.5,-100.02000000000001 -85.5,-96.69 -85.5,-93.36 -85.5,-90.03 -85.5,-86.7 -85.5,-86.7 -85.95,-86.7 -86.4,-86.7 -86.85,-86.7 -87.3,-86.7 -87.75,-86.7 -88.2,-86.7 -88.65,-86.7 -89.1,-86.7 -89.55,-86.7 -90,-90.03 -90,-93.36 -90,-96.69 -90,-100.02 -90,-103.35 -90,-106.68 -90,-110.01 -90,-113.34 -90,-116.67 -90,-120 -90,-120 -89.55,-120 -89.1,-120 -88.65,-120 -88.2,-120 -87.75,-120 -87.3,-120 -86.85,-120 -86.4,-120 -85.95,-120 -85.5))"], "date_created": "Thu, 20 Jul 2023 00:00:00 GMT", "description": "This dataset contains high-frequency impulse radar data collected by the United States portion of the International TransAntarctic Scientific Expedition (ITASE) 2001-2002 traverse from the vicinity of Hercules Dome, Antarctica to the South Pole. ", "east": -86.7, "geometry": ["POINT(-103.35 -87.75)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Hercules Dome; Ice Penetrating Radar; Snow/ice; Snow/Ice", "locations": "Antarctica; Antarctica; Hercules Dome", "north": -85.5, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Hoffman, Andrew; Welch, Brian; Jacobel, Robert; Christianson, Knut", "project_titles": "Ice Dynamics at the Intersection of the West and East Antarctic Ice Sheets", "projects": [{"proj_uid": "p0010359", "repository": "USAP-DC", "title": "Ice Dynamics at the Intersection of the West and East Antarctic Ice Sheets"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Hercules Dome Ice Core", "south": -90.0, "title": "ITASE Impulse Radar Hercules Dome to South Pole", "uid": "601712", "west": -120.0}, {"awards": "1141866 Conway, Howard", "bounds_geometry": ["POLYGON((-176 -83.5,-175.2 -83.5,-174.4 -83.5,-173.6 -83.5,-172.8 -83.5,-172 -83.5,-171.2 -83.5,-170.4 -83.5,-169.6 -83.5,-168.8 -83.5,-168 -83.5,-168 -83.55,-168 -83.6,-168 -83.65,-168 -83.7,-168 -83.75,-168 -83.8,-168 -83.85,-168 -83.9,-168 -83.95,-168 -84,-168.8 -84,-169.6 -84,-170.4 -84,-171.2 -84,-172 -84,-172.8 -84,-173.6 -84,-174.4 -84,-175.2 -84,-176 -84,-176 -83.95,-176 -83.9,-176 -83.85,-176 -83.8,-176 -83.75,-176 -83.7,-176 -83.65,-176 -83.6,-176 -83.55,-176 -83.5))"], "date_created": "Thu, 20 Jul 2023 00:00:00 GMT", "description": "This dataset contains high-frequency impulse radar data collected in the vicinity of the Beardmore Glacier grounding zone. ", "east": -168.0, "geometry": ["POINT(-172 -83.75)"], "keywords": "Antarctica; Beardmore Glacier; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Ice Penetrating Radar; Snow/ice; Snow/Ice", "locations": "Beardmore Glacier; Antarctica; Antarctica", "north": -83.5, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Hoffman, Andrew; Christianson, Knut; Conway, Howard", "project_titles": "Collaborative Research: East Antarctic Outlet Glacier Dynamics", "projects": [{"proj_uid": "p0000437", "repository": "USAP-DC", "title": "Collaborative Research: East Antarctic Outlet Glacier Dynamics"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -84.0, "title": "Beardmore Glacier High-Frequency Impulse Radar Data", "uid": "601713", "west": -176.0}, {"awards": "1738989 Venturelli, Ryan", "bounds_geometry": ["POINT(-110.96038 -75.21526)"], "date_created": "Mon, 10 Jul 2023 00:00:00 GMT", "description": "Included in this dataset are in situ carbon-14 concentrations for a series of bedrock cores recovered from the subglacial extension of Kay Peak, a grounding-line-proximal ridge of the volcanic edifice Mount Murphy (near Thwaites and Pope glaciers). Concentrations measured in these bedrock samples have been used in the associated publication to demonstrate that the Thwaites-Pope glacier system was thinner in the Holocene than it is today. ", "east": -110.96038, "geometry": ["POINT(-110.96038 -75.21526)"], "keywords": "Antarctica; Cosmogenic Radionuclides; Mount Murphy; Subglacial Bedrock", "locations": "Mount Murphy; Antarctica", "north": -75.21526, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Venturelli, Ryan; Goehring, Brent; Balco, Gregory", "project_titles": "NSF-NERC: Geological History Constraints on the Magnitude of Grounding Line Retreat in the Thwaites Glacier System", "projects": [{"proj_uid": "p0010165", "repository": "USAP-DC", "title": "NSF-NERC: Geological History Constraints on the Magnitude of Grounding Line Retreat in the Thwaites Glacier System"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -75.21526, "title": "In situ 14C data from a subglacial bedrock core near Pope and Thwaites glaciers", "uid": "601705", "west": -110.96038}, {"awards": "1847173 Duddu, Ravindra", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Tue, 04 Jul 2023 00:00:00 GMT", "description": "This dataset contains the ABAQUS input files for simulating floating ice shelves with constant density assuming linear elastic rheology or elasto-visco-plastic rheology and ABAQUS user-defined elements subroutine for water-filled cohesive zone elements.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Gao, Yuxiang; Ghosh, Gourab; Jimenez, Stephen; Duddu, Ravindra", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -90.0, "title": "Abaqus user-defined elements subroutine for cohesive zone model of hydrofracturing of surface crevasses in ice shelves", "uid": "601704", "west": -180.0}, {"awards": "1847067 Levy, Joseph", "bounds_geometry": ["POLYGON((161 -76,161.34 -76,161.68 -76,162.02 -76,162.36 -76,162.7 -76,163.04 -76,163.38 -76,163.72 -76,164.06 -76,164.4 -76,164.4 -76.2,164.4 -76.4,164.4 -76.6,164.4 -76.8,164.4 -77,164.4 -77.2,164.4 -77.4,164.4 -77.6,164.4 -77.8,164.4 -78,164.06 -78,163.72 -78,163.38 -78,163.04 -78,162.7 -78,162.36 -78,162.02 -78,161.68 -78,161.34 -78,161 -78,161 -77.8,161 -77.6,161 -77.4,161 -77.2,161 -77,161 -76.8,161 -76.6,161 -76.4,161 -76.2,161 -76))"], "date_created": "Mon, 26 Jun 2023 00:00:00 GMT", "description": "This dataset contains major ion data for surface and near-surface waters from the McMurdo Dry Valleys, determined through ion chromatography. Water types include snow and ice melt sources, streams and rivers, water track groundwater, pond water, and lake water. ", "east": 164.4, "geometry": ["POINT(162.7 -77)"], "keywords": "Antarctica; Dry Valleys", "locations": "Dry Valleys; Antarctica", "north": -76.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Levy, Joseph", "project_titles": "Linking Antarctic Cold Desert Groundwater to Thermokarst \u0026 Chemical Weathering in Partnership with the Geoscience UAV Academy", "projects": [{"proj_uid": "p0010286", "repository": "USAP-DC", "title": "Linking Antarctic Cold Desert Groundwater to Thermokarst \u0026 Chemical Weathering in Partnership with the Geoscience UAV Academy"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Surface Water Geochemistry from the McMurdo Dry Valleys", "uid": "601703", "west": 161.0}, {"awards": "1848887 McClintock, James", "bounds_geometry": ["POLYGON((-64.06 -64.76,-64.059 -64.76,-64.058 -64.76,-64.057 -64.76,-64.056 -64.76,-64.055 -64.76,-64.054 -64.76,-64.053 -64.76,-64.05199999999999 -64.76,-64.051 -64.76,-64.05 -64.76,-64.05 -64.76100000000001,-64.05 -64.762,-64.05 -64.763,-64.05 -64.764,-64.05 -64.765,-64.05 -64.766,-64.05 -64.767,-64.05 -64.768,-64.05 -64.76899999999999,-64.05 -64.77,-64.051 -64.77,-64.05199999999999 -64.77,-64.053 -64.77,-64.054 -64.77,-64.055 -64.77,-64.056 -64.77,-64.057 -64.77,-64.058 -64.77,-64.059 -64.77,-64.06 -64.77,-64.06 -64.76899999999999,-64.06 -64.768,-64.06 -64.767,-64.06 -64.766,-64.06 -64.765,-64.06 -64.764,-64.06 -64.763,-64.06 -64.762,-64.06 -64.76100000000001,-64.06 -64.76))"], "date_created": "Thu, 22 Jun 2023 00:00:00 GMT", "description": "These data are counts of amphipods that had been maintained under ambient pH (8.0 to 8.1) and experimental pH levels of 7.7 (potential end-of-century ocean acidification conditions) and 7.3 (potential next-century conditions). The amphipods were collected from the brown macroalga Desmarestia menziesii and placed into experimental containers (5-gallon buckets) for 5-6 weeks (experimental period significantly shortened by COVID complications). D. menziesii was also present in the buckets and the density of amphipods on the macroalgae was the same as it was in the field collections. The dataset includes counts of amphipods in the initial conditions and at the end of the experiment from the three pH levels.", "east": -64.05, "geometry": ["POINT(-64.055 -64.765)"], "keywords": "Antarctica; Palmer Station", "locations": "Palmer Station; Antarctica", "north": -64.76, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Amsler, Charles", "project_titles": "Assemblage-wide effects of ocean acidification and ocean warming on ecologically important macroalgal-associated crustaceans in Antarctica", "projects": [{"proj_uid": "p0010193", "repository": "USAP-DC", "title": "Assemblage-wide effects of ocean acidification and ocean warming on ecologically important macroalgal-associated crustaceans in Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.77, "title": "Amphipod counts from 2020 ocean acidification experiment", "uid": "601702", "west": -64.06}, {"awards": "1848887 McClintock, James", "bounds_geometry": ["POLYGON((-64.06 -64.76,-64.058 -64.76,-64.056 -64.76,-64.054 -64.76,-64.052 -64.76,-64.05000000000001 -64.76,-64.048 -64.76,-64.046 -64.76,-64.04400000000001 -64.76,-64.042 -64.76,-64.04 -64.76,-64.04 -64.76100000000001,-64.04 -64.762,-64.04 -64.763,-64.04 -64.764,-64.04 -64.765,-64.04 -64.766,-64.04 -64.767,-64.04 -64.768,-64.04 -64.76899999999999,-64.04 -64.77,-64.042 -64.77,-64.04400000000001 -64.77,-64.046 -64.77,-64.048 -64.77,-64.05000000000001 -64.77,-64.052 -64.77,-64.054 -64.77,-64.056 -64.77,-64.058 -64.77,-64.06 -64.77,-64.06 -64.76899999999999,-64.06 -64.768,-64.06 -64.767,-64.06 -64.766,-64.06 -64.765,-64.06 -64.764,-64.06 -64.763,-64.06 -64.762,-64.06 -64.76100000000001,-64.06 -64.76))"], "date_created": "Thu, 22 Jun 2023 00:00:00 GMT", "description": "", "east": -64.04, "geometry": ["POINT(-64.05000000000001 -64.765)"], "keywords": "Antarctica; Palmer Station", "locations": "Antarctica; Palmer Station", "north": -64.76, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Amsler, Charles", "project_titles": "Assemblage-wide effects of ocean acidification and ocean warming on ecologically important macroalgal-associated crustaceans in Antarctica", "projects": [{"proj_uid": "p0010193", "repository": "USAP-DC", "title": "Assemblage-wide effects of ocean acidification and ocean warming on ecologically important macroalgal-associated crustaceans in Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.77, "title": "2023 daily seawater carbonate chemistry", "uid": "601701", "west": -64.06}, {"awards": "1848887 McClintock, James", "bounds_geometry": ["POLYGON((-64.06 -64.76,-64.058 -64.76,-64.056 -64.76,-64.054 -64.76,-64.052 -64.76,-64.05000000000001 -64.76,-64.048 -64.76,-64.046 -64.76,-64.04400000000001 -64.76,-64.042 -64.76,-64.04 -64.76,-64.04 -64.76100000000001,-64.04 -64.762,-64.04 -64.763,-64.04 -64.764,-64.04 -64.765,-64.04 -64.766,-64.04 -64.767,-64.04 -64.768,-64.04 -64.76899999999999,-64.04 -64.77,-64.042 -64.77,-64.04400000000001 -64.77,-64.046 -64.77,-64.048 -64.77,-64.05000000000001 -64.77,-64.052 -64.77,-64.054 -64.77,-64.056 -64.77,-64.058 -64.77,-64.06 -64.77,-64.06 -64.76899999999999,-64.06 -64.768,-64.06 -64.767,-64.06 -64.766,-64.06 -64.765,-64.06 -64.764,-64.06 -64.763,-64.06 -64.762,-64.06 -64.76100000000001,-64.06 -64.76))"], "date_created": "Thu, 22 Jun 2023 00:00:00 GMT", "description": "Results of daily monitoring of carbonate chemistry parameters in experimental containers (buckets).", "east": -64.04, "geometry": ["POINT(-64.05000000000001 -64.765)"], "keywords": "Antarctica; Palmer Station", "locations": "Palmer Station; Antarctica", "north": -64.76, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Amsler, Charles", "project_titles": "Assemblage-wide effects of ocean acidification and ocean warming on ecologically important macroalgal-associated crustaceans in Antarctica", "projects": [{"proj_uid": "p0010193", "repository": "USAP-DC", "title": "Assemblage-wide effects of ocean acidification and ocean warming on ecologically important macroalgal-associated crustaceans in Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.77, "title": "2020 daily seawater carbonate chemistry", "uid": "601700", "west": -64.06}, {"awards": "1850988 Teets, Nicholas", "bounds_geometry": ["POLYGON((-64.366767 -62.68104,-63.9917003 -62.68104,-63.6166336 -62.68104,-63.241566899999995 -62.68104,-62.8665002 -62.68104,-62.4914335 -62.68104,-62.1163668 -62.68104,-61.741300100000004 -62.68104,-61.3662334 -62.68104,-60.9911667 -62.68104,-60.6161 -62.68104,-60.6161 -62.953703700000005,-60.6161 -63.2263674,-60.6161 -63.4990311,-60.6161 -63.771694800000006,-60.6161 -64.0443585,-60.6161 -64.31702220000001,-60.6161 -64.5896859,-60.6161 -64.8623496,-60.6161 -65.13501330000001,-60.6161 -65.407677,-60.9911667 -65.407677,-61.3662334 -65.407677,-61.741300100000004 -65.407677,-62.1163668 -65.407677,-62.4914335 -65.407677,-62.8665002 -65.407677,-63.241566899999995 -65.407677,-63.6166336 -65.407677,-63.9917003 -65.407677,-64.366767 -65.407677,-64.366767 -65.13501330000001,-64.366767 -64.8623496,-64.366767 -64.5896859,-64.366767 -64.31702220000001,-64.366767 -64.0443585,-64.366767 -63.771694800000006,-64.366767 -63.4990311,-64.366767 -63.2263674,-64.366767 -62.953703700000005,-64.366767 -62.68104))"], "date_created": "Thu, 22 Jun 2023 00:00:00 GMT", "description": "This study examines how energy reserves and gene expression change between Belgica antarctica larvae that did and did not go through a freezing and recovery event (frozen and control). The midges were exposed to -5C for 24h and recovered for 15 days. Samples were taken immediately after thaw, 1, 3, 7, and 15 days of recovery for biochemical assays and RNA-sequencing, \r\n\r\nDataset \"survival\" shows survival rate between frozen and control\r\nDatasets \"carb results\", \"lipid results\", and \"protein results\" show changes in energy reserves between frozen and control\r\nDataset \"KEGG results\" show pathways elicited by differential gene expression between frozen and control", "east": -60.6161, "geometry": ["POINT(-62.4914335 -64.0443585)"], "keywords": "Antarctica; Belgica Antarctica; Palmer Station", "locations": "Palmer Station; Antarctica", "north": -62.68104, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Lecheta, Melise; Devlin, Jack; Teets, Nicholas; Sousa Lima, Cleverson", "project_titles": "NSFGEO-NERC: Mechanisms of Adaptation to Terrestrial Antarctica through Comparative Physiology and Genomics of Antarctic and sub-Antarctic Insects", "projects": [{"proj_uid": "p0010203", "repository": "USAP-DC", "title": "NSFGEO-NERC: Mechanisms of Adaptation to Terrestrial Antarctica through Comparative Physiology and Genomics of Antarctic and sub-Antarctic Insects"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.407677, "title": "Long-term recovery from freezing in Belgica antarctica", "uid": "601698", "west": -64.366767}, {"awards": "2019719 Brook, Edward", "bounds_geometry": ["POLYGON((159.17 -76.67,159.195 -76.67,159.22 -76.67,159.24499999999998 -76.67,159.26999999999998 -76.67,159.295 -76.67,159.32 -76.67,159.345 -76.67,159.36999999999998 -76.67,159.39499999999998 -76.67,159.42 -76.67,159.42 -76.676,159.42 -76.682,159.42 -76.688,159.42 -76.694,159.42 -76.7,159.42 -76.706,159.42 -76.712,159.42 -76.718,159.42 -76.724,159.42 -76.73,159.39499999999998 -76.73,159.36999999999998 -76.73,159.345 -76.73,159.32 -76.73,159.295 -76.73,159.26999999999998 -76.73,159.24499999999998 -76.73,159.22 -76.73,159.195 -76.73,159.17 -76.73,159.17 -76.724,159.17 -76.718,159.17 -76.712,159.17 -76.706,159.17 -76.7,159.17 -76.694,159.17 -76.688,159.17 -76.682,159.17 -76.676,159.17 -76.67))"], "date_created": "Fri, 16 Jun 2023 00:00:00 GMT", "description": "This unpublished report describes field activities in the 2022-23 Antarctic field season by the I-188 group within COLDEX. The main purpose of this work was to identify the final coring site for a proposed 1250 m ice core. ", "east": 159.42, "geometry": ["POINT(159.295 -76.7)"], "keywords": "Allan Hills; Antarctica; Apres; Ice Core; Ice Penetrating Radar; Temperature Profiles", "locations": "Allan Hills; Antarctica", "north": -76.67, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Conway, Howard; Brook, Edward J.", "project_titles": "Center for Oldest Ice Exploration", "projects": [{"proj_uid": "p0010321", "repository": "USAP-DC", "title": "Center for Oldest Ice Exploration"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "COLDEX", "south": -76.73, "title": "2022-23 Allan Hills Intermediate Ice Core Site Selection Field Report", "uid": "601697", "west": 159.17}, {"awards": "1744993 Higgins, John", "bounds_geometry": ["POLYGON((159.17 -76.67,159.195 -76.67,159.22 -76.67,159.24499999999998 -76.67,159.26999999999998 -76.67,159.295 -76.67,159.32 -76.67,159.345 -76.67,159.36999999999998 -76.67,159.39499999999998 -76.67,159.42 -76.67,159.42 -76.676,159.42 -76.682,159.42 -76.688,159.42 -76.694,159.42 -76.7,159.42 -76.706,159.42 -76.712,159.42 -76.718,159.42 -76.724,159.42 -76.73,159.39499999999998 -76.73,159.36999999999998 -76.73,159.345 -76.73,159.32 -76.73,159.295 -76.73,159.26999999999998 -76.73,159.24499999999998 -76.73,159.22 -76.73,159.195 -76.73,159.17 -76.73,159.17 -76.724,159.17 -76.718,159.17 -76.712,159.17 -76.706,159.17 -76.7,159.17 -76.694,159.17 -76.688,159.17 -76.682,159.17 -76.676,159.17 -76.67))"], "date_created": "Fri, 16 Jun 2023 00:00:00 GMT", "description": "Unpublished field report describing drilling, sampling, and temperature profiles for shallow ice cores and boreholes at Allan Hills in 2022-2023 field season", "east": 159.42, "geometry": ["POINT(159.295 -76.7)"], "keywords": "Allan Hills; Antarctica; Ice Core", "locations": "Allan Hills; Antarctica", "north": -76.67, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Shackleton, Sarah; Brook, Edward J.", "project_titles": "Center for Oldest Ice Exploration; Collaborative research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area ", "projects": [{"proj_uid": "p0010253", "repository": "USAP-DC", "title": "Collaborative research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area "}, {"proj_uid": "p0010321", "repository": "USAP-DC", "title": "Center for Oldest Ice Exploration"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.73, "title": "Allan Hills 2022-23 Shallow Ice Core Field Report", "uid": "601696", "west": 159.17}, {"awards": "1245752 Karentz, Deneb; 1443637 Zakon, Harold", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Fri, 16 Jun 2023 00:00:00 GMT", "description": "This dataset is recordings of current, temperature, and voltage for TRPA1b and TRPV1a from Antarctic notothenioids fishes, plus metadata. TRPA1b and TRPV1a were found to be heat activated and multiple modulators of activity were tested. Paper can be accessed at: https://doi.org/10.1098/rsob.20230215. Supplementary material can be accessed at: https://doi.org/10.6084/m9.figshare.c.6858595.v2.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Notothenioid; Southern Ocean", "locations": "Southern Ocean; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "York, Julia", "project_titles": "Analysis of Voltage-gated Ion Channels in Antarctic Fish", "projects": [{"proj_uid": "p0010331", "repository": "USAP-DC", "title": "Analysis of Voltage-gated Ion Channels in Antarctic Fish"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Temperature activated transient receptor potential ion channels from Antarctic fishes", "uid": "601695", "west": -180.0}, {"awards": "1850988 Teets, Nicholas", "bounds_geometry": ["POLYGON((-64.366767 -62.681,-63.991703599999994 -62.681,-63.6166402 -62.681,-63.2415768 -62.681,-62.866513399999995 -62.681,-62.49145 -62.681,-62.1163866 -62.681,-61.7413232 -62.681,-61.366259799999995 -62.681,-60.9911964 -62.681,-60.616133 -62.681,-60.616133 -62.9536677,-60.616133 -63.226335399999996,-60.616133 -63.4990031,-60.616133 -63.7716708,-60.616133 -64.04433850000001,-60.616133 -64.31700620000001,-60.616133 -64.58967390000001,-60.616133 -64.86234160000001,-60.616133 -65.13500930000001,-60.616133 -65.407677,-60.9911964 -65.407677,-61.366259799999995 -65.407677,-61.7413232 -65.407677,-62.1163866 -65.407677,-62.49145 -65.407677,-62.866513399999995 -65.407677,-63.2415768 -65.407677,-63.6166402 -65.407677,-63.991703599999994 -65.407677,-64.366767 -65.407677,-64.366767 -65.13500930000001,-64.366767 -64.86234160000001,-64.366767 -64.58967390000001,-64.366767 -64.31700620000001,-64.366767 -64.04433850000001,-64.366767 -63.7716708,-64.366767 -63.4990031,-64.366767 -63.226335399999996,-64.366767 -62.9536677,-64.366767 -62.681))"], "date_created": "Sun, 11 Jun 2023 00:00:00 GMT", "description": "Antarctic winters are challenging for terrestrial invertebrates, and species that\r\nlive there have specialised adaptations to conserve energy and protect against\r\ncold injury in the winter. However, rapidly occurring climate change in these\r\nregions will increase the unpredictability of winter conditions, and there is\r\ncurrently a dearth of knowledge on how the highly adapted invertebrates of\r\nAntarctica will respond to changes in winter temperatures.\r\n2. We evaluated the response of larvae of the Antarctic midge, Belgica antarctica,\r\nto simulated winters at three ecologically relevant mean temperature scenarios:\r\nwarm (\u22121\u00b0C), normal (\u22123\u00b0C) and cold (\u22125\u00b0C). Within each scenario, larvae were\r\nplaced into three distinct habitat types in which they are commonly observed\r\n(decaying organic matter, living moss, and Prasiola crispa algae). Following the\r\nsimulated overwintering period, a range of physiological outcomes were measured,\r\nnamely survival, locomotor activity, tissue damage, energy store levels and\r\nmolecular stress responses.\r\n3. Survival, energy stores and locomotor activity were significantly lower following\r\nthe Warm overwintering environment than at lower temperatures, but tissue\r\ndamage and heat shock protein expression (a proxy for protein damage) did not\r\nsignificantly differ between the three temperatures. Survival was also significantly\r\nlower in larvae overwintered in Prasiola crispa algae, although the underlying\r\nmechanism is unclear. Heat shock proteins were expressed least in larvae\r\noverwintering in living moss, suggesting it is less stressful to overwinter in this\r\nsubstrate, perhaps due to a more defined structure affording less direct contact\r\nwith ice.\r\n4. Our results demonstrate that a realistic 2\u00b0C increase in winter microhabitat temperature\r\nreduces survival and causes energy deficits that have implications for subsequent\r\ndevelopment and reproduction. While our Warm winter scenario was close tothe range of observed overwintering temperatures for this species, warmer winters\r\nare expected to become more common in response to climate change. Conversely,\r\nif climate change reduces the length of winter, some of the negative consequences\r\nof winter warming may be attenuated, so it will be important to consider this factor\r\nin future studies. Nonetheless, our results indicate that winter warming could\r\nnegatively impact cold-adapted insects such as the Antarctic midge.", "east": -60.616133, "geometry": ["POINT(-62.49145 -64.04433850000001)"], "keywords": "Antarctica", "locations": "Antarctica", "north": -62.681, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Devlin, Jack; Unfried, Laura; McCabe, Eleanor; Gantz, Josiah D.; Kawarasaki, Yuta; Elnitsky, Michael; Hotaling, Scott; Michel, Andrew; Convey, Peter; Hayward, Scott; Teets, Nicholas", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -65.407677, "title": "Simulated winter warming negatively impacts survival of Antarctica\u0027s only endemic insect", "uid": "601694", "west": -64.366767}, {"awards": "1643716 Buizert, Christo", "bounds_geometry": ["POLYGON((-180 -67,-144 -67,-108 -67,-72 -67,-36 -67,0 -67,36 -67,72 -67,108 -67,144 -67,180 -67,180 -69.3,180 -71.6,180 -73.9,180 -76.2,180 -78.5,180 -80.8,180 -83.1,180 -85.4,180 -87.7,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87.7,-180 -85.4,-180 -83.1,-180 -80.8,-180 -78.5,-180 -76.2,-180 -73.9,-180 -71.6,-180 -69.3,-180 -67))"], "date_created": "Mon, 22 May 2023 00:00:00 GMT", "description": "We have reconstructed the atmospheric N2O mole fraction and its isotopic composition by combining data from ice cores, firn air, and atmospheric samples. The mole fraction reconstruction extends back to 1000 CE using ice cores, firn air, and atmospheric sampling; and the isotopic reconstruction extends back to 1900 CE using only firn air data. We have incorporated both newly measured and previously published data. We present new data for the mole fraction, d15Nbulk, d18O, and d15NSP values from the Styx (East Antarctica) firn air, and mole fraction from the North Greenland Eemian Ice drilling Project (NEEM) firn air. We have used published records from the Styx and NEEM ice cores, direct atmospheric measurements from the NOAA global sampling network, and firn air data, giving a total of 11 sites for N2O mole fraction, 12 sites for d15Nbulk, 11 sites for d18O, and 8 sites for d15NSP values.\r\n", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctic; Antarctica; Anthropogenic Emission; Atmosphere; Greenhouse Gas; Greenland; Ice Core Data; Nitrification And Denitrification Processes; Nitrous Oxide; Site-Specific 15N Isotopomer; Styx Glacier", "locations": "Antarctic; Greenland; Antarctica; Styx Glacier", "north": -67.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Ghosh, Sambit; Toyoda, Sakae ; Buizert, Christo ; Langenfelds, Ray L ; Yoshida, Naohiro ; Joong Kim, Seong; Ahn, Jinho ; Etheridge, David", "project_titles": "Collaborative Research: Reconstructing Carbon-14 of Atmospheric Carbon Monoxide from Law Dome, Antarctica to Constrain Long-Term Hydroxyl Radical Variability", "projects": [{"proj_uid": "p0010341", "repository": "USAP-DC", "title": "Collaborative Research: Reconstructing Carbon-14 of Atmospheric Carbon Monoxide from Law Dome, Antarctica to Constrain Long-Term Hydroxyl Radical Variability"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Concentration and isotopic composition of atmospheric N2O over the last century", "uid": "601693", "west": -180.0}, {"awards": "1644128 Welten, Kees; 1644094 Caffee, Marc", "bounds_geometry": ["POINT(-112.05 -79.28)"], "date_created": "Sat, 20 May 2023 00:00:00 GMT", "description": "This dataset contains a continuous depth profile of 10Be measured in ice core samples from the WAIS Divide Core between 2850 and 3240 m depth.", "east": -112.05, "geometry": ["POINT(-112.05 -79.28)"], "keywords": "10Be; Antarctica; Beryllium; Cosmogenic Radionuclides; Ice Core Data; WAIS Divide", "locations": "WAIS Divide; Antarctica", "north": -79.28, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Welten, Kees; Caffee, Marc; Woodruff, Thomas", "project_titles": "Synchronizing the WAIS Divide and Greenland Ice Cores from 30-65 ka BP using high-resolution 10Be measurements", "projects": [{"proj_uid": "p0010280", "repository": "USAP-DC", "title": "Synchronizing the WAIS Divide and Greenland Ice Cores from 30-65 ka BP using high-resolution 10Be measurements"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.28, "title": "WAIS Divide Core 10Be data, 2850-3240 m", "uid": "601692", "west": -112.05}, {"awards": "2130663 Neff, Peter", "bounds_geometry": null, "date_created": "Thu, 18 May 2023 00:00:00 GMT", "description": "Final report of the 2021 Antarctic Subsea Cable Workshop, held virtually June 29 - July 1. The National Science Foundation (NSF)-funded workshop addressed questions around the value and feasibility of deploying a new optical fiber submarine cable system that would supply high-speed internet connectivity to McMurdo Station to address the severe network bandwidth bottlenecks that currently constrain scientific research in Antarctica.", "east": null, "geometry": null, "keywords": "Antarctica; Communication; Internet; Report", "locations": "Antarctica", "north": null, "nsf_funding_programs": "Polar Cyberinfrastructure", "persons": "Andreasen, Julia; Roop, Heidi A; Pundsack, Jonathan W; Howe, Bruce; Jacobs, Gwen; Lassner, David; Yoshimi, Garrett; Timm, Kristin; Neff, Peter", "project_titles": "2021 Antarctic Subsea Cable Workshop: High-Speed Connectivity Needs to Advance US Antarctic Science", "projects": [{"proj_uid": "p0010389", "repository": "USAP-DC", "title": "2021 Antarctic Subsea Cable Workshop: High-Speed Connectivity Needs to Advance US Antarctic Science"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Antarctic Subsea Cable Workshop Report", "uid": "601691", "west": null}, {"awards": "1644256 Costa, Daniel", "bounds_geometry": ["POLYGON((-73.106701 -52.962091,-69.1243089 -52.962091,-65.1419168 -52.962091,-61.159524700000006 -52.962091,-57.1771326 -52.962091,-53.1947405 -52.962091,-49.2123484 -52.962091,-45.2299563 -52.962091,-41.2475642 -52.962091,-37.2651721 -52.962091,-33.28278 -52.962091,-33.28278 -54.530129,-33.28278 -56.098167000000004,-33.28278 -57.666205000000005,-33.28278 -59.234243,-33.28278 -60.802281,-33.28278 -62.370319,-33.28278 -63.938357,-33.28278 -65.506395,-33.28278 -67.074433,-33.28278 -68.642471,-37.2651721 -68.642471,-41.2475642 -68.642471,-45.2299563 -68.642471,-49.2123484 -68.642471,-53.1947405 -68.642471,-57.1771326 -68.642471,-61.159524700000006 -68.642471,-65.1419168 -68.642471,-69.1243089 -68.642471,-73.106701 -68.642471,-73.106701 -67.074433,-73.106701 -65.506395,-73.106701 -63.938356999999996,-73.106701 -62.370319,-73.106701 -60.802281,-73.106701 -59.234243,-73.106701 -57.666205,-73.106701 -56.098167000000004,-73.106701 -54.530129,-73.106701 -52.962091))"], "date_created": "Thu, 11 May 2023 00:00:00 GMT", "description": "The data provided here are the processed dive records obtained via Argos from the MK-10 Wildlife Computers tags. This includes the processed movement data, the diving behavior in terms of time and depth and the metadata for each seal", "east": -33.28278, "geometry": ["POINT(-53.1947405 -60.802281)"], "keywords": "Antarctica; Antarctic Peninsula; Biota; Body Mass; Diving Behavior; Leopard Seal; Seals", "locations": "Antarctic Peninsula; Antarctica", "north": -52.962091, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Costa, Daniel", "project_titles": "Collaborative Research: Foraging Ecology and Physiology of the Leopard Seal", "projects": [{"proj_uid": "p0010419", "repository": "USAP-DC", "title": "Collaborative Research: Foraging Ecology and Physiology of the Leopard Seal"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -68.642471, "title": "Leopard Seal Diving behavior data", "uid": "601690", "west": -73.106701}, {"awards": "1644256 Costa, Daniel", "bounds_geometry": ["POLYGON((-73.106701 -52.962091,-69.1243089 -52.962091,-65.1419168 -52.962091,-61.159524700000006 -52.962091,-57.1771326 -52.962091,-53.1947405 -52.962091,-49.2123484 -52.962091,-45.2299563 -52.962091,-41.2475642 -52.962091,-37.2651721 -52.962091,-33.28278 -52.962091,-33.28278 -54.530129,-33.28278 -56.098167000000004,-33.28278 -57.666205000000005,-33.28278 -59.234243,-33.28278 -60.802281,-33.28278 -62.370319,-33.28278 -63.938357,-33.28278 -65.506395,-33.28278 -67.074433,-33.28278 -68.642471,-37.2651721 -68.642471,-41.2475642 -68.642471,-45.2299563 -68.642471,-49.2123484 -68.642471,-53.1947405 -68.642471,-57.1771326 -68.642471,-61.159524700000006 -68.642471,-65.1419168 -68.642471,-69.1243089 -68.642471,-73.106701 -68.642471,-73.106701 -67.074433,-73.106701 -65.506395,-73.106701 -63.938356999999996,-73.106701 -62.370319,-73.106701 -60.802281,-73.106701 -59.234243,-73.106701 -57.666205,-73.106701 -56.098167000000004,-73.106701 -54.530129,-73.106701 -52.962091))"], "date_created": "Thu, 11 May 2023 00:00:00 GMT", "description": "The data provided here are the processed dive records obtained via Argos from the MK-10 Wildlife Computers tags. This includes the processed movement data, the diving behavior in terms of time and depth and the metadata for each seal", "east": -33.28278, "geometry": ["POINT(-53.1947405 -60.802281)"], "keywords": "Antarctica; Antarctic Peninsula; Biota; Body Mass; Diving Behavior; Leopard Seal; Movement Data; Seals", "locations": "Antarctic Peninsula; Antarctica", "north": -52.962091, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Costa, Daniel", "project_titles": "Collaborative Research: Foraging Ecology and Physiology of the Leopard Seal", "projects": [{"proj_uid": "p0010419", "repository": "USAP-DC", "title": "Collaborative Research: Foraging Ecology and Physiology of the Leopard Seal"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -68.642471, "title": "Leopard Seal movement data", "uid": "601689", "west": -73.106701}, {"awards": "1943550 McDonald, Birgitte", "bounds_geometry": ["POLYGON((164 -75,165.6 -75,167.2 -75,168.8 -75,170.4 -75,172 -75,173.6 -75,175.2 -75,176.8 -75,178.4 -75,180 -75,180 -75.3,180 -75.6,180 -75.9,180 -76.2,180 -76.5,180 -76.8,180 -77.1,180 -77.4,180 -77.7,180 -78,178.4 -78,176.8 -78,175.2 -78,173.6 -78,172 -78,170.4 -78,168.8 -78,167.2 -78,165.6 -78,164 -78,164 -77.7,164 -77.4,164 -77.1,164 -76.8,164 -76.5,164 -76.2,164 -75.9,164 -75.6,164 -75.3,164 -75))"], "date_created": "Wed, 10 May 2023 00:00:00 GMT", "description": "This dataset includes an inventory of emperor penguins captured during late chick rearing at the Cape Crozier colony in November 2022. Observations recorded include capture date, instrumentation, body mass, flipper length, and samples collected.", "east": 180.0, "geometry": ["POINT(172 -76.5)"], "keywords": "Animal Tracking; Antarctica; Biota; Emperor Penguin; GPS; Late Chick Rearing; Ross Sea", "locations": "Ross Sea; Antarctica", "north": -75.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "McDonald, Birgitte", "project_titles": "CAREER: Foraging Ecology and Physiology of Emperor Penguins in the Ross Sea", "projects": [{"proj_uid": "p0010232", "repository": "USAP-DC", "title": "CAREER: Foraging Ecology and Physiology of Emperor Penguins in the Ross Sea"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Late chick-rearing foraging ecology of emperor penguins from the Cape Crozier colony", "uid": "601688", "west": 164.0}, {"awards": "1850988 Teets, Nicholas", "bounds_geometry": ["POLYGON((-64.366767 -62.68104,-63.991703599999994 -62.68104,-63.6166402 -62.68104,-63.2415768 -62.68104,-62.866513399999995 -62.68104,-62.49145 -62.68104,-62.1163866 -62.68104,-61.7413232 -62.68104,-61.366259799999995 -62.68104,-60.9911964 -62.68104,-60.616133 -62.68104,-60.616133 -62.953703700000005,-60.616133 -63.2263674,-60.616133 -63.4990311,-60.616133 -63.771694800000006,-60.616133 -64.0443585,-60.616133 -64.31702220000001,-60.616133 -64.5896859,-60.616133 -64.8623496,-60.616133 -65.13501330000001,-60.616133 -65.407677,-60.9911964 -65.407677,-61.366259799999995 -65.407677,-61.7413232 -65.407677,-62.1163866 -65.407677,-62.49145 -65.407677,-62.866513399999995 -65.407677,-63.2415768 -65.407677,-63.6166402 -65.407677,-63.991703599999994 -65.407677,-64.366767 -65.407677,-64.366767 -65.13501330000001,-64.366767 -64.8623496,-64.366767 -64.5896859,-64.366767 -64.31702220000001,-64.366767 -64.0443585,-64.366767 -63.771694800000006,-64.366767 -63.4990311,-64.366767 -63.2263674,-64.366767 -62.953703700000005,-64.366767 -62.68104))"], "date_created": "Tue, 09 May 2023 00:00:00 GMT", "description": "The file associated with this submission contains information about the collection of Belgica antarctica individuals realized during the 2022/2023 Antarctica summer season. Each entry on the table describes the collection locations, how many sites are within each location, how many individuals were collected in each site, the collection dates, the life stage, and the species.", "east": -60.616133, "geometry": ["POINT(-62.49145 -64.0443585)"], "keywords": "Antarctica; Antarctic Peninsula; Belgica Antarctica; Biota; Sample Location", "locations": "Antarctic Peninsula; Antarctica", "north": -62.68104, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Pavinato, Vitor; Gantz, Joseph; Kawarasaki, Yuta; Devlin, Jack; Teets, Nicholas; Michel, Andrew; Peter, Convey; Sousa Lima, Cleverson", "project_titles": "NSFGEO-NERC: Mechanisms of Adaptation to Terrestrial Antarctica through Comparative Physiology and Genomics of Antarctic and sub-Antarctic Insects", "projects": [{"proj_uid": "p0010203", "repository": "USAP-DC", "title": "NSFGEO-NERC: Mechanisms of Adaptation to Terrestrial Antarctica through Comparative Physiology and Genomics of Antarctic and sub-Antarctic Insects"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.407677, "title": "Information on 2023 collection sites for Belgica antarctica", "uid": "601687", "west": -64.366767}, {"awards": "1943550 McDonald, Birgitte", "bounds_geometry": ["POLYGON((-160 -74,-158 -74,-156 -74,-154 -74,-152 -74,-150 -74,-148 -74,-146 -74,-144 -74,-142 -74,-140 -74,-140 -74.3,-140 -74.6,-140 -74.9,-140 -75.2,-140 -75.5,-140 -75.8,-140 -76.1,-140 -76.4,-140 -76.7,-140 -77,-142 -77,-144 -77,-146 -77,-148 -77,-150 -77,-152 -77,-154 -77,-156 -77,-158 -77,-160 -77,-160 -76.7,-160 -76.4,-160 -76.1,-160 -75.8,-160 -75.5,-160 -75.2,-160 -74.9,-160 -74.6,-160 -74.3,-160 -74))"], "date_created": "Mon, 08 May 2023 00:00:00 GMT", "description": "This dataset includes an inventory of emperor penguins captured after their molt in February 2023. Observations recorded include capture date, instrumentation, body mass, flipper length, and samples collected. ", "east": -140.0, "geometry": ["POINT(-150 -75.5)"], "keywords": "Antarctica; Biota; Emperor Penguin; NBP2302; Post-Molt; Ross Sea", "locations": "Antarctica; Ross Sea", "north": -74.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "McDonald, Birgitte", "project_titles": "CAREER: Foraging Ecology and Physiology of Emperor Penguins in the Ross Sea", "projects": [{"proj_uid": "p0010232", "repository": "USAP-DC", "title": "CAREER: Foraging Ecology and Physiology of Emperor Penguins in the Ross Sea"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.0, "title": "Post-molt emperor penguin foraging ecology", "uid": "601686", "west": -160.0}, {"awards": "1543445 Zhang, Jing", "bounds_geometry": ["POLYGON((-70.9 -65,-69.51 -65,-68.12 -65,-66.73 -65,-65.34 -65,-63.95 -65,-62.56 -65,-61.17 -65,-59.78 -65,-58.39 -65,-57 -65,-57 -65.5,-57 -66,-57 -66.5,-57 -67,-57 -67.5,-57 -68,-57 -68.5,-57 -69,-57 -69.5,-57 -70,-58.39 -70,-59.78 -70,-61.17 -70,-62.56 -70,-63.95 -70,-65.34 -70,-66.73 -70,-68.12 -70,-69.51 -70,-70.9 -70,-70.9 -69.5,-70.9 -69,-70.9 -68.5,-70.9 -68,-70.9 -67.5,-70.9 -67,-70.9 -66.5,-70.9 -66,-70.9 -65.5,-70.9 -65))"], "date_created": "Wed, 03 May 2023 00:00:00 GMT", "description": "This dataset includes the 3-km resolution budget terms of surface mass balance (SMB) and surface energy budget (SEB) for the Larsen C Ice Shelf during the melting season of 2017-18. The variables include the SMB budget terms of net surface mass balance, precipitation, runoff, blowing snow erosion, surface sublimation, and blowing snow sublimation, and the SEB budget terms of net surface energy budget, downwelling and upwelling longwave radiation, surface absorbed shortwave radiation, ground heat flux, and sensible / latent heat flux.", "east": -57.0, "geometry": ["POINT(-63.95 -67.5)"], "keywords": "Antarctica; Glaciology; Larsen C Ice Shelf; Model Data; Surface Energy Budget; Surface Mass Balance; WRF Model", "locations": "Antarctica; Larsen C Ice Shelf", "north": -65.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Zhang, Jing; Luo, Liping", "project_titles": "Collaborative Research: Present and Projected Future Forcings on Antarctic Peninsula Glaciers and Ice Shelves using the Weather Forecasting and Research (WRF) Model", "projects": [{"proj_uid": "p0010408", "repository": "USAP-DC", "title": "Collaborative Research: Present and Projected Future Forcings on Antarctic Peninsula Glaciers and Ice Shelves using the Weather Forecasting and Research (WRF) Model"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -70.0, "title": "3-km Surface Mass and Energy Budget for the Larsen C Ice Shelf", "uid": "601685", "west": -70.9}, {"awards": "1847067 Levy, Joseph", "bounds_geometry": ["POLYGON((160.6263 -77.575,160.91780999999997 -77.575,161.20932 -77.575,161.50083 -77.575,161.79234 -77.575,162.08384999999998 -77.575,162.37536 -77.575,162.66687000000002 -77.575,162.95838 -77.575,163.24989 -77.575,163.5414 -77.575,163.5414 -77.6003,163.5414 -77.6256,163.5414 -77.65090000000001,163.5414 -77.67620000000001,163.5414 -77.70150000000001,163.5414 -77.7268,163.5414 -77.7521,163.5414 -77.7774,163.5414 -77.8027,163.5414 -77.828,163.24989 -77.828,162.95838 -77.828,162.66687000000002 -77.828,162.37536 -77.828,162.08384999999998 -77.828,161.79234 -77.828,161.50083 -77.828,161.20932 -77.828,160.91780999999997 -77.828,160.6263 -77.828,160.6263 -77.8027,160.6263 -77.7774,160.6263 -77.7521,160.6263 -77.7268,160.6263 -77.70150000000001,160.6263 -77.67620000000001,160.6263 -77.65090000000001,160.6263 -77.6256,160.6263 -77.6003,160.6263 -77.575))"], "date_created": "Mon, 01 May 2023 00:00:00 GMT", "description": "This dataset contains soil properties data from the McMurdo Dry Valleys, focused on the properties of water tracks and adjacent dry soils. The dataset is surface and near-surface soil sample data, including sample location, water content by weight, organic matter content by weight, soluble salt extract composition by ion, and cation exchange extract concentrations from the soils. ", "east": 163.5414, "geometry": ["POINT(162.08384999999998 -77.70150000000001)"], "keywords": "Antarctica; Cation Exchange; Chemistry:soil; Chemistry:Soil; Dry Valleys; Organic Matter; Salt; Soil", "locations": "Dry Valleys; Antarctica", "north": -77.575, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Levy, Joseph", "project_titles": "Linking Antarctic Cold Desert Groundwater to Thermokarst \u0026 Chemical Weathering in Partnership with the Geoscience UAV Academy", "projects": [{"proj_uid": "p0010286", "repository": "USAP-DC", "title": "Linking Antarctic Cold Desert Groundwater to Thermokarst \u0026 Chemical Weathering in Partnership with the Geoscience UAV Academy"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.828, "title": "Biogeochemical measurements of water tracks and adjacent dry soils from the McMurdo Dry Valleys", "uid": "601684", "west": 160.6263}, {"awards": "1745078 Brook, Edward J.", "bounds_geometry": ["POINT(-112.086 -79.468)"], "date_created": "Wed, 26 Apr 2023 00:00:00 GMT", "description": "This dataset includes ~60-year resolution measurements of the Carbon-13 isotopic Composition of Atmospheric Methane (\u03b413C-CH4) of gas bubbles from the WAIS Divide Ice Core. All measurements were made at the Oregon State University Ice Core and Quaternary Geochemistry Laboratory (Corvallis, OR) using a new methane stable isotope analytical system. The data includes depth-adjacent replicate samples (separated by no more than 0.3m of depth) and is split up into two sheets for the two different intervals measured (Heinrich Stadial 1 and Heinrich Stadial 5 / Dansgaard Oeschger Event 12). The data are displayed as a function of WAIS Divide depth and were corrected for gravitational and diffusional fractionation that occurs in the firn column according to Buizert et al., 2013. 1-sigma measurement uncertainty is also included and is determined from analytical uncertainty and uncertainties associated with diffusional and gravitational fractionation.\r\n\r\nThe manuscript presenting and analyzing these data is in preparation for publication as of April 2023. ", "east": -112.086, "geometry": ["POINT(-112.086 -79.468)"], "keywords": "Antarctica; Methane; West Antarctic Ice Sheet", "locations": "West Antarctic Ice Sheet; Antarctica", "north": -79.468, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Riddell-Young, Benjamin", "project_titles": "Tracing Past Methane Variations with Stable Isotopes in Antarctic Ice Cores", "projects": [{"proj_uid": "p0010416", "repository": "USAP-DC", "title": "Tracing Past Methane Variations with Stable Isotopes in Antarctic Ice Cores"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.468, "title": "Carbon-13 isotopic composition of atmospheric methane across Heinrich Stadials 1 and 5, and Dansgaard Oesgher Event 12, WAIS Divide Ice Core, Antarctica", "uid": "601683", "west": -112.086}, {"awards": "2138277 Gallagher, Katherine", "bounds_geometry": ["POLYGON((-97.5 -56,-92.2 -56,-86.9 -56,-81.6 -56,-76.3 -56,-71 -56,-65.7 -56,-60.4 -56,-55.1 -56,-49.800000000000004 -56,-44.5 -56,-44.5 -58,-44.5 -60,-44.5 -62,-44.5 -64,-44.5 -66,-44.5 -68,-44.5 -70,-44.5 -72,-44.5 -74,-44.5 -76,-49.8 -76,-55.1 -76,-60.4 -76,-65.7 -76,-71 -76,-76.3 -76,-81.6 -76,-86.9 -76,-92.19999999999999 -76,-97.5 -76,-97.5 -74,-97.5 -72,-97.5 -70,-97.5 -68,-97.5 -66,-97.5 -64,-97.5 -62,-97.5 -60,-97.5 -58,-97.5 -56))"], "date_created": "Wed, 26 Apr 2023 00:00:00 GMT", "description": "This dataset contains passive particle trajectories from the Regional Ocean Modeling System (ROMS) in NETCDF format. Files include latitude, longitude, and depth of particles released along the West Antarctic Peninsula within the ROMS framework. Time frames and particle release depths are included in a .csv file. Data currently cover 4 austral summers: 2008, 2009, 2018, and 2019. Five different release depths were used across the 5 model years, for a total of 20 simulations.", "east": -44.5, "geometry": ["POINT(-71 -66)"], "keywords": "Antarctica; Physical Oceanography; Regional Ocean Modeling System; ROMS", "locations": "Antarctica; Antarctica", "north": -56.0, "nsf_funding_programs": "Post Doc/Travel", "persons": "Gallagher, Katherine", "project_titles": "OPP-PRF Pygoscelis Penguin Response to Potential Prey Retention along the West Antarctic Peninsula", "projects": [{"proj_uid": "p0010349", "repository": "USAP-DC", "title": "OPP-PRF Pygoscelis Penguin Response to Potential Prey Retention along the West Antarctic Peninsula"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -76.0, "title": "Passive particle trajectories from Regional Ocean Modeling System simulations 2008-2009 \u0026 2018-2019", "uid": "601682", "west": -97.5}, {"awards": "1443471 Koutnik, Michelle", "bounds_geometry": ["POINT(137.04 -89.54)"], "date_created": "Tue, 18 Apr 2023 00:00:00 GMT", "description": "This dataset comprises firn density and compaction rate measurements from USP50, a site 50km upstream of South Pole. (89.54 S, 137.04 E). Firn compaction rates were measured for two years (from January 2017 to December 2018) using string potentiometers to measure borehole shortening. Density measurements include field measurements from December 2016 and January 2017 as well as measurements made at the National Science Foundation Ice Core Facility (NSF-ICF) on a core that was returned to the U.S. for analysis. The dataset also includes measurements of (near-surface) temperature inside the boxes that housed the potentiometers. The raw data are voltage measurements from a datalogger. The dataset includes these raw data as well as processed data. It also includes the python script used to process the data and relevant files containing site and instrument specifications needed to process the data.", "east": 137.04, "geometry": ["POINT(137.04 -89.54)"], "keywords": "Antarctica; Firn; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Snow/ice; Snow/Ice; South Pole; Temperature", "locations": "South Pole; Antarctica; South Pole; Antarctica", "north": -89.54, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Stevens, Christopher Max; Lilien, David; Conway, Howard; Waddington, Edwin D.; Koutnik, Michelle; Fudge, T. J.", "project_titles": "Collaborative Research: Characterization of Upstream Ice and Firn Dynamics affecting the South Pole Ice Core", "projects": [{"proj_uid": "p0000200", "repository": "USAP-DC", "title": "Collaborative Research: Characterization of Upstream Ice and Firn Dynamics affecting the South Pole Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -89.54, "title": "Firn density and compaction rates 50km upstream of South Pole", "uid": "601680", "west": 137.04}, {"awards": "1643455 Enderlin, Ellyn; 1933764 Enderlin, Ellyn", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Thu, 06 Apr 2023 00:00:00 GMT", "description": "This dataset includes manually-extracted iceberg geometries and meltwater fluxes from 2011-2022 WorldView digital elevation model time series for 15 study sites around Antarctica. Each file contains the coordinates, median surface elevation, density, volume, surface area, draft, and submerged area estimated for an iceberg on two different observation dates (specified in the file name). The submarine meltwater flux for each iceberg, calculated as the volume change over time corrected for surface mass balance processes and creep thinning between observation dates, is provided for each iceberg. Dates listed in file names are in YYYYMMDDhhmmss format. Site abbreviations in file names are as follows: BG = Blanchard Glacier, CG = Cadman Glacier, FG = Ferrigno Glacier, FI = Filchner Ice Shelf, HG = Heim Glacier, LA = Edgeworth Glacier (Larsen A tributary), LB = Cadman Glacier (Larsen B tributary), LG = Leonardo Glacier, MI = Mertz Ice Tongue, PT = Polar Times, RI = Ronne Ice Shelf, SG = Seller Glacier, TG = Thwaites Glacier, TI = Totten Ice Shelf, and WG = Widdowson Glacier.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Elevation; Glaciology; Iceberg; Meltwater; Submarine Melt", "locations": "Antarctica; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Enderlin, Ellyn; Dickson, Adam; Miller, Emily; Dryak, Mariama; Oliver, Caitlin; Aberle, Rainey", "project_titles": "Antarctic Submarine Melt Variability from Remote Sensing of Icebergs", "projects": [{"proj_uid": "p0010210", "repository": "USAP-DC", "title": "Antarctic Submarine Melt Variability from Remote Sensing of Icebergs"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Remotely-sensed iceberg geometries and meltwater fluxes", "uid": "601679", "west": -180.0}, {"awards": "1739003 Holland, David", "bounds_geometry": ["POLYGON((-114.2703 -66.8445,-109.54270000000001 -66.8445,-104.8151 -66.8445,-100.0875 -66.8445,-95.35990000000001 -66.8445,-90.6323 -66.8445,-85.9047 -66.8445,-81.1771 -66.8445,-76.4495 -66.8445,-71.7219 -66.8445,-66.9943 -66.8445,-66.9943 -67.98911,-66.9943 -69.13372,-66.9943 -70.27833,-66.9943 -71.42294,-66.9943 -72.56755,-66.9943 -73.71216,-66.9943 -74.85677,-66.9943 -76.00138,-66.9943 -77.14599,-66.9943 -78.2906,-71.72189999999999 -78.2906,-76.4495 -78.2906,-81.1771 -78.2906,-85.90469999999999 -78.2906,-90.6323 -78.2906,-95.3599 -78.2906,-100.0875 -78.2906,-104.8151 -78.2906,-109.5427 -78.2906,-114.2703 -78.2906,-114.2703 -77.14599,-114.2703 -76.00138,-114.2703 -74.85677,-114.2703 -73.71216,-114.2703 -72.56755,-114.2703 -71.42294,-114.2703 -70.27833,-114.2703 -69.13372,-114.2703 -67.98911,-114.2703 -66.8445))"], "date_created": "Tue, 28 Mar 2023 00:00:00 GMT", "description": "Data products (radar echogram images and ice surface and ice bottom tracking) from the two ITGC MELT Accumulation Radar campaigns at Thwaites Glacier.", "east": -66.9943, "geometry": ["POINT(-90.6323 -72.56755)"], "keywords": "Antarctica; Ice Base; Ice Penetrating Radar; Ice Surface; Radar Echo Sounder; Thwaites Glacier", "locations": "Thwaites Glacier; Antarctica", "north": -66.8445, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Paden, John", "project_titles": null, "projects": null, "repositories": null, "science_programs": "Thwaites (ITGC)", "south": -78.2906, "title": "MELT 2018-2020 Accumulation Radar at Thwaites", "uid": "601678", "west": -114.2703}, {"awards": "2317097 Venturelli, Ryan", "bounds_geometry": ["POLYGON((-99.793 -74.857,-99.7882 -74.857,-99.7834 -74.857,-99.77860000000001 -74.857,-99.77380000000001 -74.857,-99.769 -74.857,-99.7642 -74.857,-99.7594 -74.857,-99.75460000000001 -74.857,-99.74980000000001 -74.857,-99.745 -74.857,-99.745 -74.8583,-99.745 -74.8596,-99.745 -74.8609,-99.745 -74.8622,-99.745 -74.8635,-99.745 -74.8648,-99.745 -74.8661,-99.745 -74.8674,-99.745 -74.8687,-99.745 -74.87,-99.74980000000001 -74.87,-99.75460000000001 -74.87,-99.7594 -74.87,-99.7642 -74.87,-99.769 -74.87,-99.77380000000001 -74.87,-99.77860000000001 -74.87,-99.7834 -74.87,-99.7882 -74.87,-99.793 -74.87,-99.793 -74.8687,-99.793 -74.8674,-99.793 -74.8661,-99.793 -74.8648,-99.793 -74.8635,-99.793 -74.8622,-99.793 -74.8609,-99.793 -74.8596,-99.793 -74.8583,-99.793 -74.857))"], "date_created": "Fri, 24 Mar 2023 00:00:00 GMT", "description": "This data set contains unprocessed radar profiles collected with a GSSI 200 MHz Hyperstacking antenna near Winkie Nunatak, West Antarctica. This data was collected to estimate depth-to-bedrock along a subglacial ridge line at depths between 20 - 120 meters. ", "east": -99.745, "geometry": ["POINT(-99.769 -74.8635)"], "keywords": "Antarctica; Ice Penetrating Radar; Pine Island Glacier; Subglacial Bedrock", "locations": "Pine Island Glacier; Antarctica", "north": -74.857, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Braddock, Scott", "project_titles": "NSF-NERC: Geological History Constraints on the Magnitude of Grounding Line Retreat in the Thwaites Glacier System", "projects": [{"proj_uid": "p0010165", "repository": "USAP-DC", "title": "NSF-NERC: Geological History Constraints on the Magnitude of Grounding Line Retreat in the Thwaites Glacier System"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -74.87, "title": "200 MHz ground-penetrating radar from Winkie Nunatak, West Antarctica", "uid": "601677", "west": -99.793}, {"awards": "2019597 Besson, Dave; 2112352 Vieregg, Abigail; 2118315 Vieregg, Abigail", "bounds_geometry": ["POLYGON((-180 72.5797,-158.15409 72.5797,-136.30818 72.5797,-114.46227 72.5797,-92.61636 72.5797,-70.77045 72.5797,-48.92454000000001 72.5797,-27.078630000000004 72.5797,-5.23272 72.5797,16.613190000000003 72.5797,38.4591 72.5797,38.4591 72.57968,38.4591 72.57966,38.4591 72.57964,38.4591 72.57962,38.4591 72.5796,38.4591 72.57957999999999,38.4591 72.57956,38.4591 72.57954,38.4591 72.57952,38.4591 72.5795,16.61319 72.5795,-5.23272 72.5795,-27.078629999999997 72.5795,-48.92454 72.5795,-70.77045000000001 72.5795,-92.61635999999999 72.5795,-114.46226999999999 72.5795,-136.30818 72.5795,-158.15409 72.5795,180 72.5795,165.84593 72.5795,151.69186 72.5795,137.53779 72.5795,123.38372 72.5795,109.22964999999999 72.5795,95.07558 72.5795,80.92151 72.5795,66.76744 72.5795,52.61336999999999 72.5795,38.4593 72.5795,38.4593 72.57952,38.4593 72.57954,38.4593 72.57956,38.4593 72.57957999999999,38.4593 72.5796,38.4593 72.57962,38.4593 72.57964,38.4593 72.57966,38.4593 72.57968,38.4593 72.5797,52.61337 72.5797,66.76744 72.5797,80.92151 72.5797,95.07558 72.5797,109.22965 72.5797,123.38372 72.5797,137.53779 72.5797,151.69186000000002 72.5797,165.84593 72.5797,-180 72.5797))"], "date_created": "Mon, 20 Mar 2023 00:00:00 GMT", "description": "Data collected by RNO-G collaboration, used to calculate attenuation lengths, internal layer reflectivities and bulk refractive index. LPDA transmitter on surface broadcasts ~10-ns high voltage pulse into ice and echoes recorded on similar surface LPDA. Data recorded on digital scope, after averaging 10000 triggers to elucidate weak features.\r\n\r\nFunding for this dataset was provided by NSF Grants and Deutsche Forschungsgemeinschaft (DFG, Grant NE 2031/2-1).", "east": 38.4591, "geometry": ["POINT(-141.5408 72.5796)"], "keywords": "Greenland Ice Cap", "locations": "Greenland Ice Cap", "north": 72.5797, "nsf_funding_programs": null, "persons": "Besson, Dave", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": 72.5795, "title": "Summer 2021 Summit Station radar echo data", "uid": "601676", "west": 38.4593}, {"awards": "1443397 Kreutz, Karl", "bounds_geometry": ["POINT(-180 -90)"], "date_created": "Thu, 16 Mar 2023 00:00:00 GMT", "description": "This dataset contains biologically relevant trace metal concentrations metrics for the\r\nSPICEcore intermediate core (SPC14), from the surface to 1751 m (~54 ka). The data set\r\nincludes cleaned Fe and Mn biologically relevant concentrations (operationally defined pH 5)\r\ntrace mental concentration measurements and dissolved concentrations (operationally defined as concentration \u0026lt;0.45\u00b5m and acidified to \u0026lt;pH 1).", "east": -180.0, "geometry": ["POINT(-180 -90)"], "keywords": "Antarctica; South Pole; SPICEcore", "locations": "South Pole; Antarctica", "north": -90.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Kreutz, Karl", "project_titles": "Collaborative Research: South Pole Ice Core Chronology and Climate Records using Chemical and Microparticle Measurements", "projects": [{"proj_uid": "p0010051", "repository": "USAP-DC", "title": "Collaborative Research: South Pole Ice Core Chronology and Climate Records using Chemical and Microparticle Measurements"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -90.0, "title": "Preliminary SPC14 high-resolution Fe and Mn biologically relevant and dissolved trace metal concentrations spanning -42 \u2013 54,300 years BP.", "uid": "601675", "west": -180.0}, {"awards": "1043761 Young, Duncan; 0230197 Holt, John; 2127606 Young, Duncan A.; 0636724 Blankenship, Donald", "bounds_geometry": ["POLYGON((-136 -74,-131.9 -74,-127.8 -74,-123.7 -74,-119.6 -74,-115.5 -74,-111.4 -74,-107.30000000000001 -74,-103.2 -74,-99.1 -74,-95 -74,-95 -74.7,-95 -75.4,-95 -76.1,-95 -76.8,-95 -77.5,-95 -78.2,-95 -78.9,-95 -79.6,-95 -80.3,-95 -81,-99.1 -81,-103.2 -81,-107.3 -81,-111.4 -81,-115.5 -81,-119.6 -81,-123.69999999999999 -81,-127.8 -81,-131.9 -81,-136 -81,-136 -80.3,-136 -79.6,-136 -78.9,-136 -78.2,-136 -77.5,-136 -76.8,-136 -76.1,-136 -75.4,-136 -74.7,-136 -74))"], "date_created": "Wed, 15 Mar 2023 00:00:00 GMT", "description": "This file contains internal radar horizon 1 (lm-MERGE-lay9-grg) for West Antarctica, collected during the SOAR/CASERTZ (1991-1996), SOAR/DVD (1999), ATRS (2001), AGASEA (2004-05) and GIMBLE (2013-2014) expeditions. Only data collected in AGASEA is contained in this specific product.\r\nThis data set is linked to PH.D thesis Muldoon, G. 2018 \"West Antarctic Ice Sheet Retreat during the Last Interglacial\"Spatial and temporal distributions of accumulation rates on the catchment of Thwaites Glacier, West Antarctica\", University of Texas at Austin\r\n https://doi.org/10.15781/T23B5WS0D\r\nThe internal radar horizon (IRH) was traced semi-automatically by Gail R. Muldoon using Haliburtons\u0027s Landmark software and picker, in a combination of 2D focused and unfocused data.\r\nDepths were calculated using a 2 way velocity in ice of 84.5 m/microsecond, and no firn correction. \r\n\r\nIsochron age is 4711 (+/- 246 ) years. \r\n\r\nFunding for this dataset as provided by NSF grants and The G. Unger Vetlesen Foundation.", "east": -95.0, "geometry": ["POINT(-115.5 -77.5)"], "keywords": "Antarchitecture; Antarctica; Ice Penetrating Radar; Isochron; Layers; Radar; Radioglaciology; Thwaites Glacier", "locations": "Thwaites Glacier; Antarctica", "north": -74.0, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Earth Sciences; Antarctic Earth Sciences", "persons": "Muldoon, Gail R.; Young, Duncan A.; Jackson, Charles; Blankenship, Donald D.", "project_titles": "Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica (AGASEA); Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System; Geophysical Investigations of Marie Byrd Land Lithospheric Evolution (GIMBLE)", "projects": [{"proj_uid": "p0000435", "repository": "USAP-DC", "title": "Geophysical Investigations of Marie Byrd Land Lithospheric Evolution (GIMBLE)"}, {"proj_uid": "p0000243", "repository": "USAP-DC", "title": "Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica (AGASEA)"}, {"proj_uid": "p0000174", "repository": "USAP-DC", "title": "Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -81.0, "title": "AGASEA 4.7 ka Englacial Isochron over the Thwaites Glacier Catchment", "uid": "601673", "west": -136.0}, {"awards": "1543347 Rosenheim, Brad", "bounds_geometry": ["POINT(-149.59134 -84.640287)"], "date_created": "Mon, 13 Mar 2023 00:00:00 GMT", "description": "This dataset includes radiocarbon (\u00b9\u2074C) and stable carbon isotope (\u03b4\u00b9\u00b3C) data for a sediment core from Mercer Subglacial Lake. In addition, this dataset includes \u00b9\u2074C and \u03b4\u00b9\u00b3C for dissolved organic carbon, dissolved inorganic carbon, and particulate organic carbon from the Mercer Subglacial Lake water column. ", "east": -149.59134, "geometry": ["POINT(-149.59134 -84.640287)"], "keywords": "Antarctica; Isotope; Mercer Subglacial Lake; Radiocarbon; Subglacial Lake", "locations": "Antarctica; Mercer Subglacial Lake", "north": -84.640287, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Venturelli, Ryan; Rosenheim, Brad", "project_titles": "Collaborative Research: Subglacial Antarctic Lakes Scientific Access (SALSA): Integrated Study of Carbon Cycling in Hydrologically-active Subglacial Environments", "projects": [{"proj_uid": "p0010119", "repository": "USAP-DC", "title": "Collaborative Research: Subglacial Antarctic Lakes Scientific Access (SALSA): Integrated Study of Carbon Cycling in Hydrologically-active Subglacial Environments"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -84.640287, "title": "Mercer Subglacial Lake radiocarbon and stable isotope data ", "uid": "601672", "west": -149.59134}, {"awards": "1744993 Higgins, John", "bounds_geometry": ["POLYGON((159.16667 -76.66667,159.19167000000002 -76.66667,159.21667000000002 -76.66667,159.24167 -76.66667,159.26667 -76.66667,159.29167 -76.66667,159.31667000000002 -76.66667,159.34167000000002 -76.66667,159.36667 -76.66667,159.39167 -76.66667,159.41667 -76.66667,159.41667 -76.67333599999999,159.41667 -76.680002,159.41667 -76.686668,159.41667 -76.693334,159.41667 -76.69999999999999,159.41667 -76.706666,159.41667 -76.713332,159.41667 -76.71999799999999,159.41667 -76.726664,159.41667 -76.73333,159.39167 -76.73333,159.36667 -76.73333,159.34167000000002 -76.73333,159.31667000000002 -76.73333,159.29167 -76.73333,159.26667 -76.73333,159.24167 -76.73333,159.21667000000002 -76.73333,159.19167000000002 -76.73333,159.16667 -76.73333,159.16667 -76.726664,159.16667 -76.71999799999999,159.16667 -76.713332,159.16667 -76.706666,159.16667 -76.69999999999999,159.16667 -76.693334,159.16667 -76.686668,159.16667 -76.680002,159.16667 -76.67333599999999,159.16667 -76.66667))"], "date_created": "Fri, 03 Mar 2023 00:00:00 GMT", "description": "This document details the ground-penetrating radar (GPR) collection activities carried out by I. Nesbitt in the Allan Hills during the 2019-2020 field season. This document is intended as an informal catalogue of the fild work and post-processing activities performed at the Allan Hills and later at McMurdo and elsewhere. It contains preliminary post-processing and analysis only. Any interpretation made and presented in this report based on the data herein is subject to change pending further examination. GPR was used to examine sub-ice bedrock topography and the stratigraphic relationship between two shallow ice core drill sites (CMC1 and CMC2), as well as to explore potential future drill sites. In accordance with. the project\u0027s objective to drill and analyze ancient ice at relatively shallow depths, the two main features of interest in this study are 1) bedrock topographic features in which ancient ice could be trapped, and 2) englacial stratigraphic layers, especially those which may represent large age discontinuities.", "east": 159.41667, "geometry": ["POINT(159.29167 -76.69999999999999)"], "keywords": "Allan Hills; Antarctica; GPR; Ice Core; Report", "locations": "Antarctica; Allan Hills", "north": -76.66667, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Nesbitt, Ian; Brook, Edward J.", "project_titles": "Center for Oldest Ice Exploration; Collaborative research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area ", "projects": [{"proj_uid": "p0010321", "repository": "USAP-DC", "title": "Center for Oldest Ice Exploration"}, {"proj_uid": "p0010253", "repository": "USAP-DC", "title": "Collaborative research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area "}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.73333, "title": "I-165-M GPR Field Report 2019-2020", "uid": "601669", "west": 159.16667}, {"awards": "1443260 Conway, Howard", "bounds_geometry": ["POLYGON((159 -76.68,159.03 -76.68,159.06 -76.68,159.09 -76.68,159.12 -76.68,159.15 -76.68,159.18 -76.68,159.21 -76.68,159.24 -76.68,159.27 -76.68,159.3 -76.68,159.3 -76.697,159.3 -76.714,159.3 -76.73100000000001,159.3 -76.748,159.3 -76.765,159.3 -76.782,159.3 -76.79899999999999,159.3 -76.816,159.3 -76.833,159.3 -76.85,159.27 -76.85,159.24 -76.85,159.21 -76.85,159.18 -76.85,159.15 -76.85,159.12 -76.85,159.09 -76.85,159.06 -76.85,159.03 -76.85,159 -76.85,159 -76.833,159 -76.816,159 -76.79899999999999,159 -76.782,159 -76.765,159 -76.748,159 -76.73100000000001,159 -76.714,159 -76.697,159 -76.68))"], "date_created": "Fri, 03 Mar 2023 00:00:00 GMT", "description": "This document details the ground penetrating radar (GPR) collection activities carried out by S.\r\nMackay (with assistance from the I-165 field team) in the Allan Hills during the 2015-2016 field\r\nseason. This document is intended as an informal catalogue of field activities, GPS data points,\r\nGPR survey line locations, and initial observations / preliminary analysis. It does not contain\r\ndetailed analysis beyond standard radar post-processing the migration of a subset of radar lines.", "east": 159.3, "geometry": ["POINT(159.15 -76.765)"], "keywords": "Allan Hills; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; GPR; Ice Core; Report", "locations": "Antarctica; Allan Hills", "north": -76.68, "nsf_funding_programs": "Antarctic Glaciology", "persons": "MacKay, Sean; Brook, Edward J.", "project_titles": "Collaborative Research: Allan HILLs Englacial Site (AHILLES) Selection", "projects": [{"proj_uid": "p0000385", "repository": "USAP-DC", "title": "Collaborative Research: Allan HILLs Englacial Site (AHILLES) Selection"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.85, "title": "2015-2016 GPR Field Report for Allan Hills Shallow Ice Coring", "uid": "601668", "west": 159.0}, {"awards": "1543454 Dunbar, Nelia; 1543361 Kurbatov, Andrei", "bounds_geometry": ["POLYGON((-180 -50,-163 -50,-146 -50,-129 -50,-112 -50,-95 -50,-78 -50,-61 -50,-44 -50,-27 -50,-10 -50,-10 -54,-10 -58,-10 -62,-10 -66,-10 -70,-10 -74,-10 -78,-10 -82,-10 -86,-10 -90,-27 -90,-44 -90,-61 -90,-78 -90,-95 -90,-112 -90,-129 -90,-146 -90,-163 -90,180 -90,175 -90,170 -90,165 -90,160 -90,155 -90,150 -90,145 -90,140 -90,135 -90,130 -90,130 -86,130 -82,130 -78,130 -74,130 -70,130 -66,130 -62,130 -58,130 -54,130 -50,135 -50,140 -50,145 -50,150 -50,155 -50,160 -50,165 -50,170 -50,175 -50,-180 -50))"], "date_created": "Thu, 16 Feb 2023 00:00:00 GMT", "description": "This dataset contains the geochemical composition of three tephra layers that were used in the development of the SPICEcore timescale (Winski et al., 2019). All tephra have been correlated to WDC06A ice core. ", "east": 130.0, "geometry": ["POINT(-120 -70)"], "keywords": "Antarctica; Electron Microprobe; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; South Pole; Tephra", "locations": "South Pole; Antarctica", "north": -50.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Iverson, Nels", "project_titles": "Collaborative Research: Tephrochronology of a South Pole Ice Core", "projects": [{"proj_uid": "p0010311", "repository": "USAP-DC", "title": "Collaborative Research: Tephrochronology of a South Pole Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -90.0, "title": "SPICEcore visable tephra", "uid": "601667", "west": -10.0}, {"awards": "1543361 Kurbatov, Andrei", "bounds_geometry": ["POINT(0 -90)"], "date_created": "Wed, 15 Feb 2023 00:00:00 GMT", "description": "This dataset includes cryptotephra data from the South Pole Ice Core (SPC-14).", "east": 0.0, "geometry": ["POINT(0 -90)"], "keywords": "Antarctica; Cryptotephra; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; South Pole; SPICEcore; Tephra", "locations": "South Pole; Antarctica", "north": -90.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Kurbatov, Andrei V.; Hartman, Laura; Helmick, Meredith; Yates, Martin", "project_titles": "Collaborative Research: Tephrochronology of a South Pole Ice Core", "projects": [{"proj_uid": "p0010311", "repository": "USAP-DC", "title": "Collaborative Research: Tephrochronology of a South Pole Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -90.0, "title": "Cryptotephra in SPC-14 ice core", "uid": "601666", "west": 0.0}, {"awards": "1445205 Putkonen, Jaakko", "bounds_geometry": ["POLYGON((157.45 -83.14,157.45299999999997 -83.14,157.456 -83.14,157.459 -83.14,157.462 -83.14,157.46499999999997 -83.14,157.468 -83.14,157.471 -83.14,157.474 -83.14,157.47699999999998 -83.14,157.48 -83.14,157.48 -83.141,157.48 -83.142,157.48 -83.143,157.48 -83.144,157.48 -83.14500000000001,157.48 -83.146,157.48 -83.147,157.48 -83.14800000000001,157.48 -83.149,157.48 -83.15,157.47699999999998 -83.15,157.474 -83.15,157.471 -83.15,157.468 -83.15,157.46499999999997 -83.15,157.462 -83.15,157.459 -83.15,157.456 -83.15,157.45299999999997 -83.15,157.45 -83.15,157.45 -83.149,157.45 -83.14800000000001,157.45 -83.147,157.45 -83.146,157.45 -83.14500000000001,157.45 -83.144,157.45 -83.143,157.45 -83.142,157.45 -83.141,157.45 -83.14))"], "date_created": "Thu, 09 Feb 2023 00:00:00 GMT", "description": "These data include the measurements and analyses done on a ~10 meter long ice cores drilled in Ong Valley buried ice site. Further descriptions can be found in the related paper listed below.", "east": 157.48, "geometry": ["POINT(157.46499999999997 -83.14500000000001)"], "keywords": "Antarctica; Buried Ice; Cosmogenic Isotopes; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Old Ice; Ong Valley", "locations": "Antarctica; Ong Valley", "north": -83.14, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Putkonen, Jaakko; Bergelin, Marie", "project_titles": "Collaborative Research: Long Term Sublimation/Preservation of Two Separate, Buried Glacier Ice Masses, Ong Valley, Southern Transantarctic Mountains", "projects": [{"proj_uid": "p0010231", "repository": "USAP-DC", "title": "Collaborative Research: Long Term Sublimation/Preservation of Two Separate, Buried Glacier Ice Masses, Ong Valley, Southern Transantarctic Mountains"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -83.15, "title": "Old Ice, Ong Valley, Transantarctic Mountains", "uid": "601665", "west": 157.45}, {"awards": "1543537 Priscu, John", "bounds_geometry": ["POINT(-149.50134 -84.640287)"], "date_created": "Fri, 03 Feb 2023 00:00:00 GMT", "description": "This dataset contains measurements of sediment porewater properties from cores collected from Mercer Subglacial Lake by the SALSA project. Included are: specific conductance; water stable isotopes (\u03b42H and \u03b418O); dissolved gases (methane and its stable isotopes \u03b413C and \u03b42H, ethylene, and ethane); and major anions and cations.", "east": -149.50134, "geometry": ["POINT(-149.50134 -84.640287)"], "keywords": "Antarctica; Gas; Geochemistry; Glacier; Glaciology; Mercer Subglacial Lake; Methane; SALSA; Sediment Core; West Antarctic Ice Sheet", "locations": "Antarctica; Mercer Subglacial Lake; Mercer Subglacial Lake; West Antarctic Ice Sheet", "north": -84.640287, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Dore, John; Michaud, Alexander; Skidmore, Mark; Tranter, Martyn; Steigmeyer, August; Science Team, SALSA", "project_titles": "Collaborative Research: Subglacial Antarctic Lakes Scientific Access (SALSA): Integrated Study of Carbon Cycling in Hydrologically-active Subglacial Environments", "projects": [{"proj_uid": "p0010119", "repository": "USAP-DC", "title": "Collaborative Research: Subglacial Antarctic Lakes Scientific Access (SALSA): Integrated Study of Carbon Cycling in Hydrologically-active Subglacial Environments"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -84.640287, "title": "Sediment porewater properties data from Mercer Subglacial Lake", "uid": "601664", "west": -149.50134}, {"awards": "1543537 Priscu, John", "bounds_geometry": ["POINT(-149.50134 -84.640287)"], "date_created": "Wed, 01 Feb 2023 00:00:00 GMT", "description": "This dataset contains water column biogeochemical properties measured on discrete samples collected from Mercer Subglacial Lake by the SALSA project. Data included are: specific conductance; carbonic acid system parameters (total alkalinity, total inorganic carbon, and pH); water stable isotopes (\u03b42H and \u03b418O); dissolved gases (oxygen, methane, nitrous oxide, and hydrogen); dissolved nutrients (ammonium, nitrite and phosphate), major anions (including nitrate) and cations; size-fractionated colloidal and dissolved trace elements); dissolved organic carbon; and microbial cell and virus-like particle counts.", "east": -149.50134, "geometry": ["POINT(-149.50134 -84.640287)"], "keywords": "Antarctica; Carbon; Cell Counts; Geochemistry; Glacier; Glaciers/ice Sheet; Glaciers/Ice Sheet; Mercer Subglacial Lake; Microbes; Nutrients; SALSA; Stable Isotopes; Trace Elements; West Antarctic Ice Sheet", "locations": "Mercer Subglacial Lake; Antarctica; West Antarctic Ice Sheet; Mercer Subglacial Lake", "north": -84.640287, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Dore, John; Skidmore, Mark; Hawkings, Jon; Steigmeyer, August; Li, Wei; Barker, Joel; Tranter, Martyn; Priscu, John; Science Team, SALSA", "project_titles": "Collaborative Research: Subglacial Antarctic Lakes Scientific Access (SALSA): Integrated Study of Carbon Cycling in Hydrologically-active Subglacial Environments", "projects": [{"proj_uid": "p0010119", "repository": "USAP-DC", "title": "Collaborative Research: Subglacial Antarctic Lakes Scientific Access (SALSA): Integrated Study of Carbon Cycling in Hydrologically-active Subglacial Environments"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -84.640287, "title": "Water column biogeochemical data from Mercer Subglacial Lake", "uid": "601663", "west": -149.50134}, {"awards": "1543537 Priscu, John", "bounds_geometry": ["POINT(-149.50134 -84.640287)"], "date_created": "Wed, 01 Feb 2023 00:00:00 GMT", "description": "This dataset contains bulk sediment properties measurements from cores collected from Mercer Subglacial Lake by the SALSA project. Included are: physical properties (bulk density, mass water content, porosity, shear strength, particle size distribution, and mineralogy); carbon (inorganic and organic); iron (ascorbate- and dithionite-extractable); and sulfur (acid-volatile and chromium-reducible).", "east": -149.50134, "geometry": ["POINT(-149.50134 -84.640287)"], "keywords": "Antarctica; Carbon; Glacier; Glaciers/ice Sheet; Glaciers/Ice Sheet; Iron; Mercer Subglacial Lake; Mineralogy; Particle Size; Physical Properties; SALSA; Sediment Core; Sulfur; West Antarctic Ice Sheet", "locations": "West Antarctic Ice Sheet; Antarctica; Mercer Subglacial Lake; Mercer Subglacial Lake", "north": -84.640287, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Dore, John; Campbell, Timothy; Michaud, Alexander; Hawkings, Jon; Skidmore, Mark; Tranter, Martyn; Venturelli, Ryan A; Science Team, SALSA", "project_titles": "Collaborative Research: Subglacial Antarctic Lakes Scientific Access (SALSA): Integrated Study of Carbon Cycling in Hydrologically-active Subglacial Environments", "projects": [{"proj_uid": "p0010119", "repository": "USAP-DC", "title": "Collaborative Research: Subglacial Antarctic Lakes Scientific Access (SALSA): Integrated Study of Carbon Cycling in Hydrologically-active Subglacial Environments"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -84.640287, "title": "Discrete bulk sediment properties data from Mercer Subglacial Lake", "uid": "601661", "west": -149.50134}, {"awards": null, "bounds_geometry": null, "date_created": "Mon, 30 Jan 2023 00:00:00 GMT", "description": "Biogeochemical data from sediment core at Inexpressible Island in Ross Sea Region during the 2015-2016 Antarctic field investigation", "east": null, "geometry": null, "keywords": "Antarctica; Sediment Core Data", "locations": "Antarctica", "north": null, "nsf_funding_programs": null, "persons": "Liu, Xiaodong", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": null, "title": "Biogeochemical data from sediment core at Inexpressible Island in Ross Sea Region during the 2015-2016 Antarctic field investigation", "uid": "601660", "west": null}, {"awards": "1841844 Steig, Eric; 2019719 Brook, Edward", "bounds_geometry": null, "date_created": "Wed, 25 Jan 2023 00:00:00 GMT", "description": "This data set contains replicate measurements of D17O from a 92-m deep section of core at Summit, Greenland and other operational data necessary to reconstruct figures presented in Davidge et al., 2022. Details of the entire dataset and a description of the relevant methods can be found in Davidge et al., 2022. The names of each sheet indicate the corresponding figure numbers. The D17O record spans about two years of accumulation. Discrete measurements by laser spectroscopy are provided at 1.4-cm resolution. For the purpose of method development, continuous-flow measurements are provided with nine replicates and are averaged to multiple depth resolutions as described in Davidge et al., 2022.", "east": null, "geometry": null, "keywords": "Antarctica; Continuous Flow; Glaciology; Greenland; Ice Core Data; Laser Spectroscopy; Oxygen Isotope; Triple Oxygen Isotopes", "locations": "Antarctica; Greenland", "north": null, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Davidge, Lindsey", "project_titles": "Center for Oldest Ice Exploration", "projects": [{"proj_uid": "p0010321", "repository": "USAP-DC", "title": "Center for Oldest Ice Exploration"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Hercules Dome Ice Core", "south": null, "title": "Replicate O-17-excess by continuous flow laser spectroscopy for an ice core section at Summit, Greenland", "uid": "601659", "west": null}, {"awards": "2152622 Morlighem, Mathieu", "bounds_geometry": ["POLYGON((-110 -74,-109 -74,-108 -74,-107 -74,-106 -74,-105 -74,-104 -74,-103 -74,-102 -74,-101 -74,-100 -74,-100 -74.3,-100 -74.6,-100 -74.9,-100 -75.2,-100 -75.5,-100 -75.8,-100 -76.1,-100 -76.4,-100 -76.7,-100 -77,-101 -77,-102 -77,-103 -77,-104 -77,-105 -77,-106 -77,-107 -77,-108 -77,-109 -77,-110 -77,-110 -76.7,-110 -76.4,-110 -76.1,-110 -75.8,-110 -75.5,-110 -75.2,-110 -74.9,-110 -74.6,-110 -74.3,-110 -74))"], "date_created": "Wed, 25 Jan 2023 00:00:00 GMT", "description": "Data resulting from comparing model and observations of sliding-law parameter and airborne radar-derived basal reflectivity underneath Thwaites Glacier, Antarctica", "east": -100.0, "geometry": ["POINT(-105 -75.5)"], "keywords": "Airborne Radar; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Thwaites; Thwaites Glacier", "locations": "Thwaites Glacier; Thwaites; Antarctica", "north": -74.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Das, Indrani", "project_titles": "NSF-NERC: PROcesses, drivers, Predictions: Modeling the response of Thwaites Glacier over the next Century using Ice/Ocean Coupled Models (PROPHET)", "projects": [{"proj_uid": "p0010400", "repository": "USAP-DC", "title": "NSF-NERC: PROcesses, drivers, Predictions: Modeling the response of Thwaites Glacier over the next Century using Ice/Ocean Coupled Models (PROPHET)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -77.0, "title": "Sliding-Law Parameter and Airborne Radar-Derived Basal Reflectivity Data Underneath Thwaites Glacier, Antarctica", "uid": "601658", "west": -110.0}, {"awards": "1543537 Priscu, John", "bounds_geometry": ["POINT(-149.50134 -84.640287)"], "date_created": "Tue, 17 Jan 2023 00:00:00 GMT", "description": "This dataset includes binned conductivity, temperature and pressure measurements from Mercer Subglacial Lake and the borehole drilled to access the lake by the SALSA project, as well as additional physical parameters derived from these measurements using the TEOS-10 equation of state.", "east": -149.50134, "geometry": ["POINT(-149.50134 -84.640287)"], "keywords": "Antarctica; Conductivity; CTD; Depth; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Hot Water Drill; Mercer Subglacial Lake; Physical Properties; SALSA; Subglacial Lake; Temperature", "locations": "Antarctica; Mercer Subglacial Lake", "north": -84.640287, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Dore, John; Priscu, John; Leventer, Amy; Rosenheim, Brad", "project_titles": "Collaborative Research: Subglacial Antarctic Lakes Scientific Access (SALSA): Integrated Study of Carbon Cycling in Hydrologically-active Subglacial Environments", "projects": [{"proj_uid": "p0010119", "repository": "USAP-DC", "title": "Collaborative Research: Subglacial Antarctic Lakes Scientific Access (SALSA): Integrated Study of Carbon Cycling in Hydrologically-active Subglacial Environments"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -84.640287, "title": "CTD data from Mercer Subglacial Lake and access borehole", "uid": "601657", "west": -149.50134}, {"awards": "2138277 Gallagher, Katherine", "bounds_geometry": ["POLYGON((-97.5 -55,-92.05 -55,-86.6 -55,-81.15 -55,-75.7 -55,-70.25 -55,-64.8 -55,-59.35 -55,-53.9 -55,-48.449999999999996 -55,-43 -55,-43 -57.1,-43 -59.2,-43 -61.3,-43 -63.4,-43 -65.5,-43 -67.6,-43 -69.7,-43 -71.8,-43 -73.9,-43 -76,-48.45 -76,-53.9 -76,-59.35 -76,-64.8 -76,-70.25 -76,-75.7 -76,-81.15 -76,-86.6 -76,-92.05000000000001 -76,-97.5 -76,-97.5 -73.9,-97.5 -71.8,-97.5 -69.7,-97.5 -67.6,-97.5 -65.5,-97.5 -63.4,-97.5 -61.3,-97.5 -59.2,-97.5 -57.099999999999994,-97.5 -55))"], "date_created": "Fri, 13 Jan 2023 00:00:00 GMT", "description": "This dataset includes daily-averaged current speed and velocity data from the Regional Ocean Modeling System. Domain covers the West Antarctic Peninsula. Simulations are from the 2008, 2009, 2018, and 2019 seasons. ", "east": -43.0, "geometry": ["POINT(-70.25 -65.5)"], "keywords": "Antarctica; Model Data; Ocean Currents; Physical Oceanography; Regional Ocean Modeling System; ROMS; West Antarctic Shelf", "locations": "Antarctica; West Antarctic Shelf", "north": -55.0, "nsf_funding_programs": "Post Doc/Travel", "persons": "Gallagher, Katherine", "project_titles": "OPP-PRF Pygoscelis Penguin Response to Potential Prey Retention along the West Antarctic Peninsula", "projects": [{"proj_uid": "p0010349", "repository": "USAP-DC", "title": "OPP-PRF Pygoscelis Penguin Response to Potential Prey Retention along the West Antarctic Peninsula"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -76.0, "title": "Current velocity and direction data from Regional Ocean Modeling System simulations (2008-2009 \u0026 2018-2019)", "uid": "601656", "west": -97.5}, {"awards": "2138277 Gallagher, Katherine", "bounds_geometry": ["POLYGON((-97.5 -56,-92.2 -56,-86.9 -56,-81.6 -56,-76.3 -56,-71 -56,-65.7 -56,-60.4 -56,-55.1 -56,-49.800000000000004 -56,-44.5 -56,-44.5 -58,-44.5 -60,-44.5 -62,-44.5 -64,-44.5 -66,-44.5 -68,-44.5 -70,-44.5 -72,-44.5 -74,-44.5 -76,-49.8 -76,-55.1 -76,-60.4 -76,-65.7 -76,-71 -76,-76.3 -76,-81.6 -76,-86.9 -76,-92.19999999999999 -76,-97.5 -76,-97.5 -74,-97.5 -72,-97.5 -70,-97.5 -68,-97.5 -66,-97.5 -64,-97.5 -62,-97.5 -60,-97.5 -58,-97.5 -56))"], "date_created": "Fri, 13 Jan 2023 00:00:00 GMT", "description": "This dataset contains simulated krill trajectories from the Regional Ocean Modeling System (ROMS) in NETCDF format. Files include latitude, longitude, and depth of particles released along the West Antarctic Peninsula within the ROMS framework with diel vertical migration behavior added to simulate Antarctic krill behavior. Time frames and diel vertical migration behaviors simulated are included in a .csv file. Data currently cover 4 austral summers: 2008, 2009, 2018, and 2019. Five different vertical migration behaviors were simulated, for a total of 20 simulations. ", "east": -44.5, "geometry": ["POINT(-71 -66)"], "keywords": "Antarctica; Antarctic Krill; Model Data; Physical Oceanography; Regional Ocean Modeling System; ROMS; West Antarctic Shelf", "locations": "Antarctica; West Antarctic Shelf", "north": -56.0, "nsf_funding_programs": "Post Doc/Travel", "persons": "Gallagher, Katherine", "project_titles": "OPP-PRF Pygoscelis Penguin Response to Potential Prey Retention along the West Antarctic Peninsula", "projects": [{"proj_uid": "p0010349", "repository": "USAP-DC", "title": "OPP-PRF Pygoscelis Penguin Response to Potential Prey Retention along the West Antarctic Peninsula"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -76.0, "title": "Simulated krill trajectory data from Regional Ocean Modeling System simulations 2008-2009 \u0026 2018-2019", "uid": "601655", "west": -97.5}, {"awards": "1744584 Klein, Andrew", "bounds_geometry": ["POLYGON((-70 -61,-69 -61,-68 -61,-67 -61,-66 -61,-65 -61,-64 -61,-63 -61,-62 -61,-61 -61,-60 -61,-60 -61.8,-60 -62.6,-60 -63.4,-60 -64.2,-60 -65,-60 -65.8,-60 -66.6,-60 -67.4,-60 -68.2,-60 -69,-61 -69,-62 -69,-63 -69,-64 -69,-65 -69,-66 -69,-67 -69,-68 -69,-69 -69,-70 -69,-70 -68.2,-70 -67.4,-70 -66.6,-70 -65.8,-70 -65,-70 -64.2,-70 -63.4,-70 -62.6,-70 -61.8,-70 -61))"], "date_created": "Wed, 11 Jan 2023 00:00:00 GMT", "description": "This dataset a CSV file containing the percentages of water (non-land) pixels within various sized buffers (100, 300, 3,000 and 10,000 m radii) buffers around fifteen sampling sites that were classified as being either Sea Ice or Cloud in the Antarctic Landsat Views collection housed within Esri\u2019s curated Living Atlas of the world which is a collection of ready-to-use global geographic content. The encompass a portion of the Western Antarctic Peninsula. This dataset was developed in support of projects ANT-1744550, -744570, -1744584, and -1744602.", "east": -60.0, "geometry": ["POINT(-65 -65)"], "keywords": "Antarctica; Antarctic Peninsula; GIS; LANDSAT; LMG1904; Remote Sensing; R/v Laurence M. Gould", "locations": "Antarctica; Antarctic Peninsula", "north": -61.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Klein, Andrew", "project_titles": "Collaborative Research: Sea ice as a driver of Antarctic benthic macroalgal community composition and nearshore trophic connectivity", "projects": [{"proj_uid": "p0010104", "repository": "USAP-DC", "title": "Collaborative Research: Sea ice as a driver of Antarctic benthic macroalgal community composition and nearshore trophic connectivity"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -69.0, "title": "Landsat Sea Ice/Cloud classifications surrounding project study sites", "uid": "601654", "west": -70.0}, {"awards": "1744602 Iken, Katrin", "bounds_geometry": ["POLYGON((-68 -64.5,-67.5 -64.5,-67 -64.5,-66.5 -64.5,-66 -64.5,-65.5 -64.5,-65 -64.5,-64.5 -64.5,-64 -64.5,-63.5 -64.5,-63 -64.5,-63 -64.95,-63 -65.4,-63 -65.85,-63 -66.3,-63 -66.75,-63 -67.2,-63 -67.65,-63 -68.1,-63 -68.55,-63 -69,-63.5 -69,-64 -69,-64.5 -69,-65 -69,-65.5 -69,-66 -69,-66.5 -69,-67 -69,-67.5 -69,-68 -69,-68 -68.55,-68 -68.1,-68 -67.65,-68 -67.2,-68 -66.75,-68 -66.3,-68 -65.85,-68 -65.4,-68 -64.95,-68 -64.5))"], "date_created": "Tue, 10 Jan 2023 00:00:00 GMT", "description": "The purpose of this dataset was to determine the importance of macroalgal primary producers to the coastal invertebrate food webs along a gradient of sites with increasing mean annual sea ice cover. This dataset contains the carbon and nitrogen stable isotope values, in addition to carbon and nitrogen content, of various coastal primary producers and invertebrate consumers from 15 stations along the Antarctic Peninsula from 64 to 69 degree latitude south collected in 2019. Primary producers included multiple species of macroalgae, particulate organic matter (POM) as a proxy of phytoplankton production, and benthic diatoms (where they occurred). Consumers included various benthic invertebrates of different feeding types, from suspension feeders (like sponges and ascidians) to predators/omnivores (like sea stars). ", "east": -63.0, "geometry": ["POINT(-65.5 -66.75)"], "keywords": "Antarctica; Antarctic Peninsula; Biota; Carbon; Carbon Isotopes; LMG1904; Nitrogen Isotopes; Oceans", "locations": "Antarctica; Antarctic Peninsula", "north": -64.5, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Iken, Katrin", "project_titles": "Collaborative Research: Sea ice as a driver of Antarctic benthic macroalgal community composition and nearshore trophic connectivity", "projects": [{"proj_uid": "p0010104", "repository": "USAP-DC", "title": "Collaborative Research: Sea ice as a driver of Antarctic benthic macroalgal community composition and nearshore trophic connectivity"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -69.0, "title": "Carbon and nitrogen isotope data along a gradient at the Antarctic Peninsula", "uid": "601653", "west": -68.0}, {"awards": "2148517 Hancock, Cathrine", "bounds_geometry": ["POLYGON((-60 -56,-51 -56,-42 -56,-33 -56,-24 -56,-15 -56,-6 -56,3 -56,12 -56,21 -56,30 -56,30 -57.8,30 -59.6,30 -61.4,30 -63.2,30 -65,30 -66.8,30 -68.6,30 -70.4,30 -72.2,30 -74,21 -74,12 -74,3 -74,-6 -74,-15 -74,-24 -74,-33 -74,-42 -74,-51 -74,-60 -74,-60 -72.2,-60 -70.4,-60 -68.6,-60 -66.8,-60 -65,-60 -63.2,-60 -61.4,-60 -59.6,-60 -57.8,-60 -56))"], "date_created": "Mon, 09 Jan 2023 00:00:00 GMT", "description": "Trajectories for RAFOS enabled profiling floats created using the acoustic tracking software program Artoa4Argo. The floats were deployed in the Weddell Gyre on Polarstern Cruise ANTXXIV/3. The floats were part of the US ARGO Program and were deployed by the University of Washington (PI: Stephen Riser) to drift in the Weddell Gyre from 2008 to 2012. ", "east": 30.0, "geometry": ["POINT(-15 -65)"], "keywords": "Antarctica; ANTXXIV/3; Argo Float; Artoa4argo; GPS Data; RAFOS; US Argo Program; Weddell Sea", "locations": "Weddell Sea; Antarctica", "north": -56.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Hancock, Cathrine", "project_titles": "Weddell Gyre Mean Circulation and Eddy Statistics from Floats", "projects": [{"proj_uid": "p0010310", "repository": "USAP-DC", "title": "Weddell Gyre Mean Circulation and Eddy Statistics from Floats"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -74.0, "title": "Under ice trajectories for RAFOS enabled profiling floats in the Weddell Gyre", "uid": "601652", "west": -60.0}, {"awards": "1744584 Klein, Andrew", "bounds_geometry": ["POLYGON((-78 -60,-74.6 -60,-71.2 -60,-67.8 -60,-64.4 -60,-61 -60,-57.6 -60,-54.2 -60,-50.8 -60,-47.400000000000006 -60,-44 -60,-44 -61.3,-44 -62.6,-44 -63.9,-44 -65.2,-44 -66.5,-44 -67.8,-44 -69.1,-44 -70.4,-44 -71.7,-44 -73,-47.4 -73,-50.8 -73,-54.2 -73,-57.6 -73,-61 -73,-64.4 -73,-67.8 -73,-71.2 -73,-74.6 -73,-78 -73,-78 -71.7,-78 -70.4,-78 -69.1,-78 -67.8,-78 -66.5,-78 -65.2,-78 -63.9,-78 -62.6,-78 -61.3,-78 -60))"], "date_created": "Fri, 06 Jan 2023 00:00:00 GMT", "description": "This dataset comprises a series of geotiff grids of modelled solar radiation (Wh m-2 day-1) for a portion of the Western Antarctic Peninsula. The grids were generated using the r.sun module in Grass GIS. In addition to the a geotiff grid representing the average daily global horizontal irradiance for an entire year, the dataset also includes geotiffs containing daily values of direct beam irradiance, diffuse irradiance, ground reflected irradiance, and global (total) irradiance (all in Wh m-2 day-1) as well as insolation time (hours). This dataset was created in support of projects ANT-1744550, -1744570, -1744584, and -1744602.", "east": -44.0, "geometry": ["POINT(-61 -66.5)"], "keywords": "Antarctica; Antarctic Peninsula; Biota; GIS; GIS Data; LMG1904; R/v Laurence M. Gould; Solar Radiation", "locations": "Antarctica; Antarctic Peninsula", "north": -60.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Klein, Andrew", "project_titles": "Collaborative Research: Sea ice as a driver of Antarctic benthic macroalgal community composition and nearshore trophic connectivity", "projects": [{"proj_uid": "p0010104", "repository": "USAP-DC", "title": "Collaborative Research: Sea ice as a driver of Antarctic benthic macroalgal community composition and nearshore trophic connectivity"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -73.0, "title": "Modelled Solar Irradiance for Western Antarctic Pennisula", "uid": "601651", "west": -78.0}, {"awards": "1744584 Klein, Andrew", "bounds_geometry": ["POLYGON((-78 -60,-74.6 -60,-71.2 -60,-67.8 -60,-64.4 -60,-61 -60,-57.6 -60,-54.2 -60,-50.8 -60,-47.400000000000006 -60,-44 -60,-44 -61.3,-44 -62.6,-44 -63.9,-44 -65.2,-44 -66.5,-44 -67.8,-44 -69.1,-44 -70.4,-44 -71.7,-44 -73,-47.4 -73,-50.8 -73,-54.2 -73,-57.6 -73,-61 -73,-64.4 -73,-67.8 -73,-71.2 -73,-74.6 -73,-78 -73,-78 -71.7,-78 -70.4,-78 -69.1,-78 -67.8,-78 -66.5,-78 -65.2,-78 -63.9,-78 -62.6,-78 -61.3,-78 -60))"], "date_created": "Thu, 05 Jan 2023 00:00:00 GMT", "description": "This dataset comprises a series of geotiff files containing mean annual or summer (October-February) gridded sea ice concentrations for five-year periods developed from available Sea Ice Concentration Datasets (AMSR2, the Sea Ice Index, and National Ice Center Charts). The grids encompass a portion of the Western Antarctic Peninsula. This dataset was developed in support of projects ANT-1744550, -1744570, -1744584, and -1744602.", "east": -44.0, "geometry": ["POINT(-61 -66.5)"], "keywords": "Antarctica; Antarctic Peninsula; LMG1904; National Ice Center Charts; Sea Ice Concentration", "locations": "Antarctica; Antarctica; Antarctic Peninsula", "north": -60.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Klein, Andrew", "project_titles": "Collaborative Research: Sea ice as a driver of Antarctic benthic macroalgal community composition and nearshore trophic connectivity", "projects": [{"proj_uid": "p0010104", "repository": "USAP-DC", "title": "Collaborative Research: Sea ice as a driver of Antarctic benthic macroalgal community composition and nearshore trophic connectivity"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -73.0, "title": "Five year mean annual and summer sea ice concentration grids for the Western Antarctic Peninsula from AMSR2, National Ice Center Charts and the Sea Ice Index ", "uid": "601649", "west": -78.0}, {"awards": "1543450 Countway, Peter", "bounds_geometry": ["POLYGON((-66 -63,-65.7 -63,-65.4 -63,-65.1 -63,-64.8 -63,-64.5 -63,-64.2 -63,-63.9 -63,-63.6 -63,-63.3 -63,-63 -63,-63 -63.3,-63 -63.6,-63 -63.9,-63 -64.2,-63 -64.5,-63 -64.8,-63 -65.1,-63 -65.4,-63 -65.7,-63 -66,-63.3 -66,-63.6 -66,-63.9 -66,-64.2 -66,-64.5 -66,-64.8 -66,-65.1 -66,-65.4 -66,-65.7 -66,-66 -66,-66 -65.7,-66 -65.4,-66 -65.1,-66 -64.8,-66 -64.5,-66 -64.2,-66 -63.9,-66 -63.6,-66 -63.3,-66 -63))"], "date_created": "Tue, 03 Jan 2023 00:00:00 GMT", "description": "Rates of heterotrophic bacterial production (BP) via 3H-Leu uptake were estimated for samples collected from Station E (Palmer Station, Antarctica) and associated incubation experiments. Rates of BP in seawater incubations greatly exceeded BP rates in the environment, likely due to stimulation of phytoplankton blooms and addition of DMSP in experimental treatments. \r\nMethods for determining BP were identical to those used by Palmer LTER investigators. References for the analytical methods used for these analyses are included in a secondary tab with the uploaded data. ", "east": -63.0, "geometry": ["POINT(-64.5 -64.5)"], "keywords": "3H-Leu; Antarctica; Bacteria; Biota; DMSP; Heterotrophic Bacterial Production; Palmer Station", "locations": "Antarctica; Palmer Station", "north": -63.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Countway, Peter; Matrai, Patricia", "project_titles": "Microbial Community Structure and Expression of Functional Genes Involved in the Seasonal Cycling of DMSP in the Southern Ocean", "projects": [{"proj_uid": "p0010120", "repository": "USAP-DC", "title": "Microbial Community Structure and Expression of Functional Genes Involved in the Seasonal Cycling of DMSP in the Southern Ocean"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -66.0, "title": "Heterotrophic Bacterial Production Samples from Station E (Palmer Station, Antarctica) and Associated Incubation Experiments", "uid": "601644", "west": -66.0}, {"awards": "1543450 Countway, Peter", "bounds_geometry": ["POLYGON((-66 -63,-65.7 -63,-65.4 -63,-65.1 -63,-64.8 -63,-64.5 -63,-64.2 -63,-63.9 -63,-63.6 -63,-63.3 -63,-63 -63,-63 -63.3,-63 -63.6,-63 -63.9,-63 -64.2,-63 -64.5,-63 -64.8,-63 -65.1,-63 -65.4,-63 -65.7,-63 -66,-63.3 -66,-63.6 -66,-63.9 -66,-64.2 -66,-64.5 -66,-64.8 -66,-65.1 -66,-65.4 -66,-65.7 -66,-66 -66,-66 -65.7,-66 -65.4,-66 -65.1,-66 -64.8,-66 -64.5,-66 -64.2,-66 -63.9,-66 -63.6,-66 -63.3,-66 -63))"], "date_created": "Tue, 03 Jan 2023 00:00:00 GMT", "description": "Dissolved inorganic nutrient samples were collected from Station E (Palmer Station, Antarctica) and associated incubation experiments with Station E water. Samples were analyzed for Nitrate plus Nitrite, Nitrite, Ammonium, Phosphate and Silicate. All nutrient analyses were performed at Bigelow Laboratory for Ocean Sciences. An overview of the analytical methods used for these analyses is included in a secondary tab with the uploaded data.", "east": -63.0, "geometry": ["POINT(-64.5 -64.5)"], "keywords": "Antarctica; Nitrate; Nitrite; Palmer Station; Phosphate", "locations": "Palmer Station; Antarctica", "north": -63.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Countway, Peter; Matrai, Patricia", "project_titles": "Microbial Community Structure and Expression of Functional Genes Involved in the Seasonal Cycling of DMSP in the Southern Ocean", "projects": [{"proj_uid": "p0010120", "repository": "USAP-DC", "title": "Microbial Community Structure and Expression of Functional Genes Involved in the Seasonal Cycling of DMSP in the Southern Ocean"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -66.0, "title": "Dissolved Inorganic Nutrient Samples from Station E (Palmer Station, Antarctica) and Associated Incubation Experiments ", "uid": "601645", "west": -66.0}, {"awards": "1543450 Countway, Peter", "bounds_geometry": ["POLYGON((-66 -63,-65.7 -63,-65.4 -63,-65.1 -63,-64.8 -63,-64.5 -63,-64.2 -63,-63.9 -63,-63.6 -63,-63.3 -63,-63 -63,-63 -63.3,-63 -63.6,-63 -63.9,-63 -64.2,-63 -64.5,-63 -64.8,-63 -65.1,-63 -65.4,-63 -65.7,-63 -66,-63.3 -66,-63.6 -66,-63.9 -66,-64.2 -66,-64.5 -66,-64.8 -66,-65.1 -66,-65.4 -66,-65.7 -66,-66 -66,-66 -65.7,-66 -65.4,-66 -65.1,-66 -64.8,-66 -64.5,-66 -64.2,-66 -63.9,-66 -63.6,-66 -63.3,-66 -63))"], "date_created": "Tue, 03 Jan 2023 00:00:00 GMT", "description": "Biogenic sulfur samples were collected from Station E (Palmer Station, Antarctica) and from associated incubation experiments with Station E water. Samples were analyzed for Dimethyl Sulfide (DMS), particulate Dimethylsulfoniopropionate (DMSPp), dissolved Dimethylsulfoniopropionate (DMSPd), particulate Dimethylsulfoxide (DMSOp), dissolved Dimethylsulfoxide (DMSOd) and DMSP lyase activity. All analyses were performed at Palmer Station during scientific deployments. An overview of the methods used for these analyses is included in a secondary tab with the uploaded data.", "east": -63.0, "geometry": ["POINT(-64.5 -64.5)"], "keywords": "Antarctica; Biota; Dimethyl Sulfide; Dimethylsulfoniopropionate; Dimethylsulfoxide; DMSP; DMSP Lyase; Palmer Station", "locations": "Antarctica; Palmer Station", "north": -63.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Countway, Peter; Matrai, Patricia", "project_titles": "Microbial Community Structure and Expression of Functional Genes Involved in the Seasonal Cycling of DMSP in the Southern Ocean", "projects": [{"proj_uid": "p0010120", "repository": "USAP-DC", "title": "Microbial Community Structure and Expression of Functional Genes Involved in the Seasonal Cycling of DMSP in the Southern Ocean"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -66.0, "title": "Biogenic Sulfur Samples from Station E (Palmer Station, Antarctica) and Associated Incubation Experiments", "uid": "601648", "west": -66.0}, {"awards": "1543450 Countway, Peter", "bounds_geometry": ["POLYGON((-66 -63,-65.7 -63,-65.4 -63,-65.1 -63,-64.8 -63,-64.5 -63,-64.2 -63,-63.9 -63,-63.6 -63,-63.3 -63,-63 -63,-63 -63.3,-63 -63.6,-63 -63.9,-63 -64.2,-63 -64.5,-63 -64.8,-63 -65.1,-63 -65.4,-63 -65.7,-63 -66,-63.3 -66,-63.6 -66,-63.9 -66,-64.2 -66,-64.5 -66,-64.8 -66,-65.1 -66,-65.4 -66,-65.7 -66,-66 -66,-66 -65.7,-66 -65.4,-66 -65.1,-66 -64.8,-66 -64.5,-66 -64.2,-66 -63.9,-66 -63.6,-66 -63.3,-66 -63))"], "date_created": "Tue, 03 Jan 2023 00:00:00 GMT", "description": "Flow cytometry samples were collected from Station E (Palmer Station, Antarctica) and associated incubation experiments with Station E water. Samples were analyzed for Phytoplankton (\u003c20 um), Cryptophytes (\u003c20 um), Heterotrophic Nanoflagellates (\u003c20 um) and Total Bacteria. All flow cytometric analyses were performed at Bigelow Laboratory for Ocean Sciences. An overview of the analytical methods used for these samples is included in a secondary tab with the uploaded data.", "east": -63.0, "geometry": ["POINT(-64.5 -64.5)"], "keywords": "Antarctica; Palmer Station; Phytoplankton", "locations": "Antarctica; Palmer Station", "north": -63.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Countway, Peter; Matrai, Patricia", "project_titles": "Microbial Community Structure and Expression of Functional Genes Involved in the Seasonal Cycling of DMSP in the Southern Ocean", "projects": [{"proj_uid": "p0010120", "repository": "USAP-DC", "title": "Microbial Community Structure and Expression of Functional Genes Involved in the Seasonal Cycling of DMSP in the Southern Ocean"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -66.0, "title": "Flow Cytometry Samples from Station E (Palmer Station, Antarctica) and Associated Incubation Experiments", "uid": "601647", "west": -66.0}, {"awards": "1543450 Countway, Peter", "bounds_geometry": ["POLYGON((-66 -63,-65.7 -63,-65.4 -63,-65.1 -63,-64.8 -63,-64.5 -63,-64.2 -63,-63.9 -63,-63.6 -63,-63.3 -63,-63 -63,-63 -63.3,-63 -63.6,-63 -63.9,-63 -64.2,-63 -64.5,-63 -64.8,-63 -65.1,-63 -65.4,-63 -65.7,-63 -66,-63.3 -66,-63.6 -66,-63.9 -66,-64.2 -66,-64.5 -66,-64.8 -66,-65.1 -66,-65.4 -66,-65.7 -66,-66 -66,-66 -65.7,-66 -65.4,-66 -65.1,-66 -64.8,-66 -64.5,-66 -64.2,-66 -63.9,-66 -63.6,-66 -63.3,-66 -63))"], "date_created": "Tue, 03 Jan 2023 00:00:00 GMT", "description": "Dissolved Organic Carbon (DOC) and Total Dissolved Nitrogen (TDN) samples were collected from Station E (Palmer Station, Antarctica) and associated incubation experiments with Station E water. Samples were analyzed for DOC and TDN using a Shimadzu TOC-L system equipped with TNM-L for N detection. All analyses were performed in the Hansell Lab at the University of Miami, FL (USA). References for the analytical methods used for these analyses are included in a secondary tab with the uploaded data.", "east": -63.0, "geometry": ["POINT(-64.5 -64.5)"], "keywords": "Antarctica; Carbon; Dissolved Organic Carbon; Nitrogen; Palmer Station; TDN; Total Dissolved Nitrogen", "locations": "Palmer Station; Antarctica", "north": -63.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Countway, Peter; Matrai, Patricia", "project_titles": "Microbial Community Structure and Expression of Functional Genes Involved in the Seasonal Cycling of DMSP in the Southern Ocean", "projects": [{"proj_uid": "p0010120", "repository": "USAP-DC", "title": "Microbial Community Structure and Expression of Functional Genes Involved in the Seasonal Cycling of DMSP in the Southern Ocean"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -66.0, "title": "Dissolved Organic Carbon (DOC) and Total Dissolved Nitrogen (TDN) Samples from Station E (Palmer Station, Antarctica) and Associated Incubation Experiments", "uid": "601646", "west": -66.0}, {"awards": "1744584 Klein, Andrew", "bounds_geometry": ["POLYGON((-78 -60,-74.6 -60,-71.2 -60,-67.8 -60,-64.4 -60,-61 -60,-57.6 -60,-54.2 -60,-50.8 -60,-47.400000000000006 -60,-44 -60,-44 -61.3,-44 -62.6,-44 -63.9,-44 -65.2,-44 -66.5,-44 -67.8,-44 -69.1,-44 -70.4,-44 -71.7,-44 -73,-47.4 -73,-50.8 -73,-54.2 -73,-57.6 -73,-61 -73,-64.4 -73,-67.8 -73,-71.2 -73,-74.6 -73,-78 -73,-78 -71.7,-78 -70.4,-78 -69.1,-78 -67.8,-78 -66.5,-78 -65.2,-78 -63.9,-78 -62.6,-78 -61.3,-78 -60))"], "date_created": "Thu, 29 Dec 2022 00:00:00 GMT", "description": "This dataset contains gridded sea ice concentrations developed from vector GIS National Ice Center (NIC) Charts for a portion of the western Antarctic Peninsula. This dataset was developed in support of projects ANT-1744550, -1744570, -1744584, and -1744602. It contains geotif files containing the minimum, maximum, and midpoint (average) sea ice concentrations in tenths calculated from NIC vector GIS layers for the 2008-2019 time period.", "east": -44.0, "geometry": ["POINT(-61 -66.5)"], "keywords": "Antarctica; Antarctic Peninsula; LMG1904; National Ice Center Charts; R/v Laurence M. Gould; Sea Ice Concentration", "locations": "Antarctica; Antarctic Peninsula", "north": -60.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Klein, Andrew", "project_titles": "Collaborative Research: Sea ice as a driver of Antarctic benthic macroalgal community composition and nearshore trophic connectivity", "projects": [{"proj_uid": "p0010104", "repository": "USAP-DC", "title": "Collaborative Research: Sea ice as a driver of Antarctic benthic macroalgal community composition and nearshore trophic connectivity"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -73.0, "title": "Gridded sea ice concentrations from National Ice Center (NIC) Charts 2014-2019 for Western Antarctic Peninsula ", "uid": "601643", "west": -78.0}, {"awards": "1744584 Klein, Andrew", "bounds_geometry": ["POLYGON((-70 -61,-69 -61,-68 -61,-67 -61,-66 -61,-65 -61,-64 -61,-63 -61,-62 -61,-61 -61,-60 -61,-60 -61.8,-60 -62.6,-60 -63.4,-60 -64.2,-60 -65,-60 -65.8,-60 -66.6,-60 -67.4,-60 -68.2,-60 -69,-61 -69,-62 -69,-63 -69,-64 -69,-65 -69,-66 -69,-67 -69,-68 -69,-69 -69,-70 -69,-70 -68.2,-70 -67.4,-70 -66.6,-70 -65.8,-70 -65,-70 -64.2,-70 -63.4,-70 -62.6,-70 -61.8,-70 -61))"], "date_created": "Thu, 29 Dec 2022 00:00:00 GMT", "description": "This cvs dataset contains time series of sea ice concentrations from four remote sensing derived products \u2013 the Sea Ice Index (Sea Ice Index), AMSR2 and AMSR-E, and National Ice Center NIC Charts. The dataset consists of the daily (or weekly in the case of NIC) timeseries for the available period of record beginning in 1979 for the Sea Ice Index and extending until April 1, 2019. The sea ice concentrations were extracted from the nearest corresponding pixels from the fifteen study sites associated with visited by projects ANT-1744550, -1744570, -1744584, and -1744602 during ARSV Laurence M. Gould cruise LMG 19-04 in April and May 2019. In addition to the original time series, five-year annual means starting on April 1st are computed for the Sea Ice Index, AMSR2 and NIC datasets all of which covered the 2014-2019 period. These five-year means include both annual and summer (October-February).", "east": -60.0, "geometry": ["POINT(-65 -65)"], "keywords": "Antarctica; Antarctic Peninsula; Biota; LMG1904; R/v Laurence M. Gould; Sea Ice Concentration", "locations": "Antarctica; Antarctic Peninsula; Antarctica", "north": -61.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Klein, Andrew", "project_titles": "Collaborative Research: Sea ice as a driver of Antarctic benthic macroalgal community composition and nearshore trophic connectivity", "projects": [{"proj_uid": "p0010104", "repository": "USAP-DC", "title": "Collaborative Research: Sea ice as a driver of Antarctic benthic macroalgal community composition and nearshore trophic connectivity"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -69.0, "title": "Sea Ice Concentration Timeseries for study sites", "uid": "601642", "west": -70.0}, {"awards": "1744584 Klein, Andrew", "bounds_geometry": ["POLYGON((-70 -61,-69 -61,-68 -61,-67 -61,-66 -61,-65 -61,-64 -61,-63 -61,-62 -61,-61 -61,-60 -61,-60 -61.8,-60 -62.6,-60 -63.4,-60 -64.2,-60 -65,-60 -65.8,-60 -66.6,-60 -67.4,-60 -68.2,-60 -69,-61 -69,-62 -69,-63 -69,-64 -69,-65 -69,-66 -69,-67 -69,-68 -69,-69 -69,-70 -69,-70 -68.2,-70 -67.4,-70 -66.6,-70 -65.8,-70 -65,-70 -64.2,-70 -63.4,-70 -62.6,-70 -61.8,-70 -61))"], "date_created": "Thu, 29 Dec 2022 00:00:00 GMT", "description": "This csv dataset contains modelled average global horizontal solar irradiance (KWh m-2 day-1) for the fifteen study sites associated with visited by projects ANT-1744550, -1744570, -1744584, and -1744602 during ARSV Laurence M. Gould cruise LMG 19-04 in April and May 2019.", "east": -60.0, "geometry": ["POINT(-65 -65)"], "keywords": "Antarctica; Average Global Horizontal Solar Irradiance; Biota; LMG1904; R/v Laurence M. Gould", "locations": "Antarctica", "north": -61.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Klein, Andrew", "project_titles": "Collaborative Research: Sea ice as a driver of Antarctic benthic macroalgal community composition and nearshore trophic connectivity", "projects": [{"proj_uid": "p0010104", "repository": "USAP-DC", "title": "Collaborative Research: Sea ice as a driver of Antarctic benthic macroalgal community composition and nearshore trophic connectivity"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -69.0, "title": "Average global horizontal solar irradiance at study sites", "uid": "601641", "west": -70.0}, {"awards": "1744584 Klein, Andrew", "bounds_geometry": ["POLYGON((-70 -61,-69 -61,-68 -61,-67 -61,-66 -61,-65 -61,-64 -61,-63 -61,-62 -61,-61 -61,-60 -61,-60 -61.8,-60 -62.6,-60 -63.4,-60 -64.2,-60 -65,-60 -65.8,-60 -66.6,-60 -67.4,-60 -68.2,-60 -69,-61 -69,-62 -69,-63 -69,-64 -69,-65 -69,-66 -69,-67 -69,-68 -69,-69 -69,-70 -69,-70 -68.2,-70 -67.4,-70 -66.6,-70 -65.8,-70 -65,-70 -64.2,-70 -63.4,-70 -62.6,-70 -61.8,-70 -61))"], "date_created": "Thu, 29 Dec 2022 00:00:00 GMT", "description": "This csv dataset contains diffuse attenuation coefficients (units: m-1) from the Visible Infrared Imaging Radiometer Suite (VIIRS) Kd(490) product. The values are from the nearest corresponding pixels from the fifteen study sites associated with visited by projects ANT-1744550, -1744570, -1744584, and -1744602 during ARSV Laurence M. Gould cruise LMG 19-04 in April and May 2019. \r\nThese attenuation coefficients were generated by the NOAA CoastWatch/OceanWatch program. They are remote sensing estimates of diffuse attenuation coefficients at a 490 nm wavelength in for approximately 4x4 km cells using the algorithm described in (Wang et al., 2017).\r\nThe dataset includes January-February-March (JFM), October-November-December (OND) as well as October to March averages for each site. OND averages are not available for all sites and therefore are not included in the October-March averages. An indication of the distance from the site to the nearest pixel with a Kd(490) observation is noted.\r\nWang, M., X. Liu, L. Jiang, and S. Son. 2017. Algorithm Theoretical Basis Document (ATBD), The VIIRS Ocean Color Products, Algorithm Theoretical Basis Document Version 1.0.", "east": -60.0, "geometry": ["POINT(-65 -65)"], "keywords": "Antarctica; Biota; Diffuse Attenuation Coefficient; LMG1904; R/v Laurence M. Gould; Turbidity", "locations": "Antarctica", "north": -61.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Klein, Andrew", "project_titles": "Collaborative Research: Sea ice as a driver of Antarctic benthic macroalgal community composition and nearshore trophic connectivity", "projects": [{"proj_uid": "p0010104", "repository": "USAP-DC", "title": "Collaborative Research: Sea ice as a driver of Antarctic benthic macroalgal community composition and nearshore trophic connectivity"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -69.0, "title": "VIIRS KD(490) diffuse attenuation coefficients for study sites", "uid": "601640", "west": -70.0}, {"awards": "1744584 Klein, Andrew", "bounds_geometry": ["POLYGON((-70 -61,-69 -61,-68 -61,-67 -61,-66 -61,-65 -61,-64 -61,-63 -61,-62 -61,-61 -61,-60 -61,-60 -61.8,-60 -62.6,-60 -63.4,-60 -64.2,-60 -65,-60 -65.8,-60 -66.6,-60 -67.4,-60 -68.2,-60 -69,-61 -69,-62 -69,-63 -69,-64 -69,-65 -69,-66 -69,-67 -69,-68 -69,-69 -69,-70 -69,-70 -68.2,-70 -67.4,-70 -66.6,-70 -65.8,-70 -65,-70 -64.2,-70 -63.4,-70 -62.6,-70 -61.8,-70 -61))"], "date_created": "Thu, 29 Dec 2022 00:00:00 GMT", "description": "This csv dataset includes the fetch distances for the 15 study sites visited by projects ANT-1744550, -1744570, -1744584, and -1744602 during ARSV Laurence M. Gould cruise LMG 19-04 in April and May 2019. The fetch distances were computed for each of the following eight cardinal directions (0\u00b0,45\u00b0,90\u00b0,135\u00b0,180\u00b0,225\u00b0,270\u00b0,315\u00b0). The fetches are all reported in meters (m). Fetch was determined by computing the distance along each of the eight directions to the nearest shoreline based on a 100 m resolution land/water grid. The grid was constructed using a vector-to-raster conversion of the Scientific Council of Antarctic Research (SCAR) Antarctic Digital Database\u2019s High resolution vector polylines of the Antarctic coastline. The fetch computations utilized an ArcGIS toolbox based on code by Finlayson (2006) that computes fetch using the recommended procedures from the US Army Corp of Engineers Shore Protection Manual (USACE, 1984).\r\nFinlayson, D.P. 2006. The geomorphology of Puget Sound beaches. Ph.D. dissertation. University of Washington, Seattle. 216 p.\r\nGerrish, L., Fretwell, P., \u0026 Cooper, P. (2021). High resolution vector polylines of the Antarctic coastline (7.4) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research \u0026 Innovation. https://doi.org/10.5285/e46be5bc-ef8e-4fd5-967b-92863fbe2835\u0027.\r\nUSACE, 1984. Shore Protection Manual, Coastal Engineering Research Center, Fort Belvoir, Virginia.\r\n", "east": -60.0, "geometry": ["POINT(-65 -65)"], "keywords": "Antarctica; Antarctic Peninsula; Biota; Fetch; LMG1904; R/v Laurence M. Gould", "locations": "Antarctica; Antarctic Peninsula", "north": -61.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Klein, Andrew", "project_titles": "Collaborative Research: Sea ice as a driver of Antarctic benthic macroalgal community composition and nearshore trophic connectivity", "projects": [{"proj_uid": "p0010104", "repository": "USAP-DC", "title": "Collaborative Research: Sea ice as a driver of Antarctic benthic macroalgal community composition and nearshore trophic connectivity"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -69.0, "title": "Computed fetch for project study sites", "uid": "601639", "west": -70.0}, {"awards": "1644197 Simms, Alexander", "bounds_geometry": null, "date_created": "Mon, 19 Dec 2022 00:00:00 GMT", "description": "This dataset provides the raw and processed ground-penetrating radar (GPR) data collected on Joinville Island in the Antarctic Peninsula. ", "east": null, "geometry": null, "keywords": "Antarctica; Joinville Island", "locations": "Antarctica; Joinville Island", "north": null, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Simms, Alexander", "project_titles": "Collaborative Research: New Constraints on Post-Glacial Rebound and Holocene Environmental History along the Northern Antarctic Peninsula from Raised Beaches", "projects": [{"proj_uid": "p0010132", "repository": "USAP-DC", "title": "Collaborative Research: New Constraints on Post-Glacial Rebound and Holocene Environmental History along the Northern Antarctic Peninsula from Raised Beaches"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Ground Penetrating Radar Profiles from Beaches on Joinville Island, Antarctic Peninsula", "uid": "601632", "west": null}, {"awards": "1644197 Simms, Alexander", "bounds_geometry": null, "date_created": "Mon, 19 Dec 2022 00:00:00 GMT", "description": "This dataset consists of the location, elevation, and age of samples obtained from Joinville Island along the Antarctic Peninsula", "east": null, "geometry": null, "keywords": "Antarctica; Joinville Island; Raised Beaches; Sea Level", "locations": "Antarctica; Joinville Island", "north": null, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Simms, Alexander", "project_titles": "Collaborative Research: New Constraints on Post-Glacial Rebound and Holocene Environmental History along the Northern Antarctic Peninsula from Raised Beaches", "projects": [{"proj_uid": "p0010132", "repository": "USAP-DC", "title": "Collaborative Research: New Constraints on Post-Glacial Rebound and Holocene Environmental History along the Northern Antarctic Peninsula from Raised Beaches"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Radiocarbon Ages from Beaches on Joinville Island, Antarctic Peninsula", "uid": "601634", "west": null}, {"awards": "1644197 Simms, Alexander", "bounds_geometry": null, "date_created": "Mon, 19 Dec 2022 00:00:00 GMT", "description": "This dataset includes ground-penetrating radar (GPR) data collected on Livingston Island in the Antarctic Peninsula.", "east": null, "geometry": null, "keywords": "Antarctica; Joinville Island", "locations": "Antarctica; Joinville Island", "north": null, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Simms, Alexander", "project_titles": "Collaborative Research: New Constraints on Post-Glacial Rebound and Holocene Environmental History along the Northern Antarctic Peninsula from Raised Beaches", "projects": [{"proj_uid": "p0010132", "repository": "USAP-DC", "title": "Collaborative Research: New Constraints on Post-Glacial Rebound and Holocene Environmental History along the Northern Antarctic Peninsula from Raised Beaches"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Ground-Penetrating Radar data from Livingston Island in the Antarctic Peninsula", "uid": "601633", "west": null}, {"awards": "NNX16AL07G TBD", "bounds_geometry": ["POLYGON((-155.3 -82.75,-155.27 -82.75,-155.24 -82.75,-155.21 -82.75,-155.18 -82.75,-155.15 -82.75,-155.12 -82.75,-155.09 -82.75,-155.06 -82.75,-155.03 -82.75,-155 -82.75,-155 -82.76,-155 -82.77,-155 -82.78,-155 -82.78999999999999,-155 -82.8,-155 -82.81,-155 -82.82,-155 -82.83,-155 -82.83999999999999,-155 -82.85,-155.03 -82.85,-155.06 -82.85,-155.09 -82.85,-155.12 -82.85,-155.15 -82.85,-155.18 -82.85,-155.21 -82.85,-155.24 -82.85,-155.27 -82.85,-155.3 -82.85,-155.3 -82.83999999999999,-155.3 -82.83,-155.3 -82.82,-155.3 -82.81,-155.3 -82.8,-155.3 -82.78999999999999,-155.3 -82.78,-155.3 -82.77,-155.3 -82.76,-155.3 -82.75))"], "date_created": "Wed, 14 Dec 2022 00:00:00 GMT", "description": "This work was primarily funded by the NASA-funded RISE-UP: Ross Ice Shelf \u0026 Europa Underwater Probe (PI Britney E. Schmidt) project. Field work at the KIS-1 site during the 2019-2020 season was completed through international collaboration between NASA, NSF/USAP, and Antarctica New Zealand, funded by the Aotearoa New Zealand Antarctic Science Platform (ANTA1801) Antarctic Ice Dynamics Project (ASP02101), and the NZARI-funded Aotearoa New Zealand Ross Ice Shelf Programme, \u201cVulnerability of the Ross Ice Shelf in a Warming World\u201d (grant no. 2014-11).\r\n\r\nThe data contained in this directory are merged and calibrated data files from three missions conducted with ROV Icefin through a borehole drilled through Ross Ice Shelf at KIS1 (-82.78410, -155.26267), near the Kamb Ice Stream grounding zone. Missions were conducted in 2019 on December 16th, 18th, and 21st (UTC). For questions or assistance working with the data please contact Britney Schmidt (britneys@cornell.edu) and Justin Lawrence (jdl287@cornell.edu).", "east": -155.0, "geometry": ["POINT(-155.15 -82.8)"], "keywords": "Antarctica; Grounding Line; Grounding Zone; Ice Shelf; Kamb Ice Stream; Ross Ice Shelf", "locations": "Kamb Ice Stream; Antarctica; Kamb Ice Stream; Ross Ice Shelf; Antarctica", "north": -82.75, "nsf_funding_programs": null, "persons": "Lawrence, Justin; Schmidt, Britney", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -82.85, "title": "KIS-1 ROV Icefin Missions", "uid": "601625", "west": -155.3}, {"awards": "1543539 Liwanag, Heather", "bounds_geometry": null, "date_created": "Tue, 13 Dec 2022 00:00:00 GMT", "description": "These data were collected in 2017 and 2019 in McMurdo Sound, Antarctica. Included are reported dose of sedation drugs administered to Weddell seal pups during a longitudinal study at 4 age timepoints during early devleopment. Vital signs including heart rate (HR) and respiration rate (RR) during sedation are included, as are reactions to the drugs, such as if and how many apnea events were recorded, whether an animal exhibited cyanosis. \r\nThis study was conducted with ethical approval from NOAA Fisheries under the Marine Mammal Protection Act (permit # 21006-01), the Antarctic Conservation Act (permit # 2018-013 M#1) and the California Polytechnic University Institutional Animal Care and Use Committee (#1605 and 1904).", "east": null, "geometry": null, "keywords": "Antarctica; McMurdo Sound; Weddell Seal", "locations": "McMurdo Sound; Antarctica", "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Pearson, Linnea", "project_titles": "RUI: Growing Up on Ice: Physiological Adaptations and Developmental Plasticity in Weddell Seal Pups Across Two Extreme Physical Environments", "projects": [{"proj_uid": "p0010144", "repository": "USAP-DC", "title": "RUI: Growing Up on Ice: Physiological Adaptations and Developmental Plasticity in Weddell Seal Pups Across Two Extreme Physical Environments"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Sedation dose and response", "uid": "601631", "west": null}, {"awards": "2021245 Li, Yun; 1643735 Li, Yun", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -61.8,180 -63.6,180 -65.4,180 -67.2,180 -69,180 -70.8,180 -72.6,180 -74.4,180 -76.2,180 -78,144 -78,108 -78,72 -78,36 -78,0 -78,-36 -78,-72 -78,-108 -78,-144 -78,-180 -78,-180 -76.2,-180 -74.4,-180 -72.6,-180 -70.8,-180 -69,-180 -67.2,-180 -65.4,-180 -63.6,-180 -61.8,-180 -60))"], "date_created": "Mon, 12 Dec 2022 00:00:00 GMT", "description": "Coastal Antarctic polynyas are regions with concentrated phytoplankton blooms, and therefore have important implications for marine ecosystems and the associated carbon cycles. Seasonal water-column stratification, regulated by sea ice, can modulate the exposure of phytoplankton to light and nutrients, and is one of the most important factors that control the duration and strength of algal blooms. Polynyas differ greatly in their stratification, thus are not equally productive in terms of phytoplankton biomass, nor equally vulnerable to the changes in regional climate. To date, most studies have been focusing on individual polynyas, yet a systematic assessment of stratification patterns across polynyas is still lacking. Therefore, we examined the spatial and seasonal variability of stratification in circum-Antarctic coastal polynyas. Using \u003e105 in situ hydrographic casts combined from the World Ocean Database (1970-2021) and the Marine Mammals Exploring the Oceans Pole to Pole Consortium Database (2004-2017), we constructed stratification seasonal climatology using 0-100 m Simpson Energy. Our results showed that stratification magnitude varies by a factor of 6 and its onset time displays 1-2 months difference across all the polynyas. In the presence of warmer water at depths, polynyas tend to develop stronger stratification than others. The spatial variations of stratification are negatively related to sea ice retreat rate and polynya size, indicative of distinct dynamics resulted from the interaction of sea ice melting, advection and water-column mixing.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctic; Antarctica; Antarctic Coastal Polynyas; Polynya", "locations": "Antarctic Coastal Polynyas; Antarctic; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Li, Yun; Shunk, Nathan; Zhang, Weifeng", "project_titles": "Collaborative Research: Polynyas in Coastal Antarctica (PICA): Linking Physical Dynamics to Biological Variability", "projects": [{"proj_uid": "p0010044", "repository": "USAP-DC", "title": "Collaborative Research: Polynyas in Coastal Antarctica (PICA): Linking Physical Dynamics to Biological Variability"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Monthly Stratification Climatology (1978-2021) in Antarctic Coastal Polynyas", "uid": "601628", "west": -180.0}, {"awards": "1644155 Twining, Benjamin", "bounds_geometry": ["POLYGON((-78.1833 -68.4333,-78.16499 -68.4333,-78.14668 -68.4333,-78.12837 -68.4333,-78.11006 -68.4333,-78.09175 -68.4333,-78.07344 -68.4333,-78.05513 -68.4333,-78.03682 -68.4333,-78.01851 -68.4333,-78.0002 -68.4333,-78.0002 -68.43664,-78.0002 -68.43998,-78.0002 -68.44332,-78.0002 -68.44666000000001,-78.0002 -68.45,-78.0002 -68.45334,-78.0002 -68.45668,-78.0002 -68.46002,-78.0002 -68.46336000000001,-78.0002 -68.4667,-78.01851 -68.4667,-78.03682 -68.4667,-78.05513 -68.4667,-78.07344 -68.4667,-78.09175 -68.4667,-78.11006 -68.4667,-78.12837 -68.4667,-78.14668 -68.4667,-78.16499 -68.4667,-78.1833 -68.4667,-78.1833 -68.46336000000001,-78.1833 -68.46002,-78.1833 -68.45668,-78.1833 -68.45334,-78.1833 -68.45,-78.1833 -68.44666000000001,-78.1833 -68.44332,-78.1833 -68.43998,-78.1833 -68.43664,-78.1833 -68.4333))"], "date_created": "Mon, 12 Dec 2022 00:00:00 GMT", "description": "Varying depth samples from Ace, Deep, \u0026 Organic Lake were obtained between 2013-2014. These samples were size fractionated by filtration for metagenomic analyses. Viral and bacterial abundances were determine on the filtrate fractions by flow cytometric analysis. Glutaraldehyde-fixed samples were stained with SYBR Green I fluorescence dye and virus-like particle (VLP) and bacteria-like cell (BLC) populations were discriminated based on green fluorescence and side scatter flow cytometry signals. Several distinct VLP and BLC populations where enumerated from Ace Lake and Organic Lake samples that revealed temporal and depth differences. Discrete VLP and BLC populations could not be discerned from Deep Lake samples. These files include the original flow cytometry particle counts (raw data), the gating templates used to count VLP and BLC populations (analysis_templates), and the resulting particle counts (analyzed).", "east": -78.0002, "geometry": ["POINT(-78.09175 -68.45)"], "keywords": "Ace Lake; Antarctica; Deep Lake; Organic Lake; Vestfold Hills", "locations": "Organic Lake; Antarctica; Antarctica; Vestfold Hills; Ace Lake; Deep Lake", "north": -68.4333, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Twining, Benjamin; Martinez-Martinez, Joaquin", "project_titles": "Viral control of microbial communities in Antarctic lakes", "projects": [{"proj_uid": "p0010237", "repository": "USAP-DC", "title": "Viral control of microbial communities in Antarctic lakes"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -68.4667, "title": "Flow cytometry enumeration of virus-like and bacteria-like abundance in Ace, Deep, \u0026 Organic lakes (Antarctica)", "uid": "601626", "west": -78.1833}, {"awards": "1738913 Scambos, Ted", "bounds_geometry": ["POLYGON((-105.6 -75.05,-105.58 -75.05,-105.56 -75.05,-105.53999999999999 -75.05,-105.52 -75.05,-105.5 -75.05,-105.48 -75.05,-105.46000000000001 -75.05,-105.44 -75.05,-105.42 -75.05,-105.4 -75.05,-105.4 -75.05499999999999,-105.4 -75.06,-105.4 -75.065,-105.4 -75.07,-105.4 -75.07499999999999,-105.4 -75.08,-105.4 -75.085,-105.4 -75.08999999999999,-105.4 -75.095,-105.4 -75.1,-105.42 -75.1,-105.44 -75.1,-105.46000000000001 -75.1,-105.48 -75.1,-105.5 -75.1,-105.52 -75.1,-105.53999999999999 -75.1,-105.56 -75.1,-105.58 -75.1,-105.6 -75.1,-105.6 -75.095,-105.6 -75.08999999999999,-105.6 -75.085,-105.6 -75.08,-105.6 -75.07499999999999,-105.6 -75.07,-105.6 -75.065,-105.6 -75.06,-105.6 -75.05499999999999,-105.6 -75.05))"], "date_created": "Thu, 01 Dec 2022 00:00:00 GMT", "description": "CTD data (date-time, device ID, conductivity, raw temperature, pressure, and salinity) for four CTD units recorded as they were lowered through the ice-shelf boreholes at the two sites and into the underlying ocean during installation. Cavity AMIGOS-III station CTDs were installed on 30-31 December 2019 (earlier data are from a salt-water tank in McMurdo); Channel AMIGOS-III CTDs were installed on 12 January 2020.", "east": -105.4, "geometry": ["POINT(-105.5 -75.07499999999999)"], "keywords": "Amundsen Sea; Antarctica; CTD; Ice Shelf", "locations": "Amundsen Sea; Antarctica", "north": -75.05, "nsf_funding_programs": "Antarctic Glaciology", "persons": "SCAMBOS, Ted", "project_titles": "NSF-NERC The Future of Thwaites Glacier and its Contribution to Sea-level Rise Science Coordination Office", "projects": [{"proj_uid": "p0010127", "repository": "USAP-DC", "title": "NSF-NERC The Future of Thwaites Glacier and its Contribution to Sea-level Rise Science Coordination Office"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -75.1, "title": "Profile CTD Data During Installation of AMIGOS-III Cavity and Channel On-Ice Moorings", "uid": "601623", "west": -105.6}, {"awards": "1744832 Severinghaus, Jeffrey", "bounds_geometry": ["POINT(159.3562 -76.73243)"], "date_created": "Tue, 22 Nov 2022 00:00:00 GMT", "description": "These data cover the penultimate glacial period (MIS 6) and parts of MIS5, in Allan Hills ice. The d18Oatm data are useful for dating the core, and the 15N is useful for inferring firn thickness. Importantly, the data have only been corrected for gas loss using published methods (i.e. Baggenstos et al. 2017), but not for recently recognized (and unpublished) effects of declining contemporary atmospheric O2/N2 due to fossil fuel burning. These changes unfortunately affect the La Jolla Air standard gas O2/N2 ratio that is used in our lab to make the measurements. Users of this data are encouraged to contact Jeff Severinghaus for help in making these novel corrections to the standard gas.", "east": 159.3562, "geometry": ["POINT(159.3562 -76.73243)"], "keywords": "18O; Allan Hills; Allan Hills Blue Ice; Antarctica; Blue Ice; Delta 15N; Delta 18O; Dole Effect; Firn Thickness; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Chronology; Ice Core Records", "locations": "Allan Hills; Antarctica", "north": -76.73243, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Severinghaus, Jeffrey P.", "project_titles": "Center for Oldest Ice Exploration; Collaborative research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area ", "projects": [{"proj_uid": "p0010321", "repository": "USAP-DC", "title": "Center for Oldest Ice Exploration"}, {"proj_uid": "p0010253", "repository": "USAP-DC", "title": "Collaborative research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area "}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.73243, "title": "Allan Hills CMC3 ice core d18Oatm, d15N, dO2/N2, dAr/N2, d40/36Ar, d40/38Ar 2021 \u0026 2022", "uid": "601620", "west": 159.3562}, {"awards": "1341339 Baker, Bill; 1341333 McClintock, James", "bounds_geometry": ["POLYGON((-64.36222 -64.72805,-64.325105 -64.72805,-64.28799 -64.72805,-64.250875 -64.72805,-64.21376 -64.72805,-64.176645 -64.72805,-64.13953 -64.72805,-64.102415 -64.72805,-64.0653 -64.72805,-64.028185 -64.72805,-63.99107 -64.72805,-63.99107 -64.74691299999999,-63.99107 -64.765776,-63.99107 -64.784639,-63.99107 -64.803502,-63.99107 -64.82236499999999,-63.99107 -64.841228,-63.99107 -64.860091,-63.99107 -64.878954,-63.99107 -64.897817,-63.99107 -64.91668,-64.028185 -64.91668,-64.0653 -64.91668,-64.102415 -64.91668,-64.13953 -64.91668,-64.176645 -64.91668,-64.21376 -64.91668,-64.250875 -64.91668,-64.28799 -64.91668,-64.325105 -64.91668,-64.36222 -64.91668,-64.36222 -64.897817,-64.36222 -64.878954,-64.36222 -64.860091,-64.36222 -64.841228,-64.36222 -64.82236499999999,-64.36222 -64.803502,-64.36222 -64.784639,-64.36222 -64.765776,-64.36222 -64.74691299999999,-64.36222 -64.72805))"], "date_created": "Tue, 22 Nov 2022 00:00:00 GMT", "description": "Data and R code from Sabrina Heiser\u0027s study of the reproductive system of Plocamium sp. in the Palmer Station region.", "east": -63.99107, "geometry": ["POINT(-64.176645 -64.82236499999999)"], "keywords": "Antarctica; Benthic; Biota; Macroalgae; Population Genetics", "locations": "Antarctica", "north": -64.72805, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "Amsler, Charles", "project_titles": "Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula - continuing", "projects": [{"proj_uid": "p0010016", "repository": "USAP-DC", "title": "Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula - continuing"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.91668, "title": "Plocamium reproductive system data and R code", "uid": "601622", "west": -64.36222}, {"awards": "1341339 Baker, Bill; 1341333 McClintock, James", "bounds_geometry": ["POLYGON((-64.3622 -64.72805,-64.325087 -64.72805,-64.287974 -64.72805,-64.250861 -64.72805,-64.213748 -64.72805,-64.176635 -64.72805,-64.139522 -64.72805,-64.102409 -64.72805,-64.065296 -64.72805,-64.028183 -64.72805,-63.99107 -64.72805,-63.99107 -64.74691299999999,-63.99107 -64.765776,-63.99107 -64.784639,-63.99107 -64.803502,-63.99107 -64.82236499999999,-63.99107 -64.841228,-63.99107 -64.860091,-63.99107 -64.878954,-63.99107 -64.897817,-63.99107 -64.91668,-64.028183 -64.91668,-64.065296 -64.91668,-64.102409 -64.91668,-64.139522 -64.91668,-64.176635 -64.91668,-64.213748 -64.91668,-64.250861 -64.91668,-64.287974 -64.91668,-64.325087 -64.91668,-64.3622 -64.91668,-64.3622 -64.897817,-64.3622 -64.878954,-64.3622 -64.860091,-64.3622 -64.841228,-64.3622 -64.82236499999999,-64.3622 -64.803502,-64.3622 -64.784639,-64.3622 -64.765776,-64.3622 -64.74691299999999,-64.3622 -64.72805))"], "date_created": "Tue, 22 Nov 2022 00:00:00 GMT", "description": "Data from Sabrina Heiser\u0027s study of Plocamium sp. benthic transect and transplant studies. ", "east": -63.99107, "geometry": ["POINT(-64.176635 -64.82236499999999)"], "keywords": "Antarctica; Benthic; Biota; Macroalgae; Mesograzer; Microscopy; Oceans; Secondary Metabolites", "locations": "Antarctica", "north": -64.72805, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "Amsler, Charles", "project_titles": "Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula - continuing", "projects": [{"proj_uid": "p0010016", "repository": "USAP-DC", "title": "Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula - continuing"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.91668, "title": "Plocamium transect and transplant data", "uid": "601621", "west": -64.3622}, {"awards": "1744550 Amsler, Charles; 1744570 Galloway, Aaron; 1744602 Iken, Katrin; 1744584 Klein, Andrew", "bounds_geometry": ["POLYGON((-67.77137 -64.77195,-67.3795463 -64.77195,-66.9877226 -64.77195,-66.59589890000001 -64.77195,-66.2040752 -64.77195,-65.8122515 -64.77195,-65.4204278 -64.77195,-65.0286041 -64.77195,-64.6367804 -64.77195,-64.2449567 -64.77195,-63.853133 -64.77195,-63.853133 -65.16396350000001,-63.853133 -65.555977,-63.853133 -65.9479905,-63.853133 -66.34000400000001,-63.853133 -66.73201750000001,-63.853133 -67.124031,-63.853133 -67.5160445,-63.853133 -67.90805800000001,-63.853133 -68.3000715,-63.853133 -68.692085,-64.2449567 -68.692085,-64.6367804 -68.692085,-65.0286041 -68.692085,-65.4204278 -68.692085,-65.8122515 -68.692085,-66.2040752 -68.692085,-66.59589890000001 -68.692085,-66.9877226 -68.692085,-67.3795463 -68.692085,-67.77137 -68.692085,-67.77137 -68.3000715,-67.77137 -67.90805800000001,-67.77137 -67.5160445,-67.77137 -67.124031,-67.77137 -66.73201750000001,-67.77137 -66.34000400000001,-67.77137 -65.9479905,-67.77137 -65.555977,-67.77137 -65.16396350000001,-67.77137 -64.77195))"], "date_created": "Thu, 17 Nov 2022 00:00:00 GMT", "description": "This dataset consists of a file with results of community analyses from underwater video transects along the benthos at 14 sites between the Joubin Islands in the north and the Terra Firma Islands in the south. ", "east": -63.853133, "geometry": ["POINT(-65.8122515 -66.73201750000001)"], "keywords": "Antarctica; Antarctic Peninsula; Benthic Communities; Biota; Macroalgae; Macroinvertebrates; Oceans; Video Transects", "locations": "Antarctic Peninsula; Antarctica; Antarctic Peninsula; Antarctica", "north": -64.77195, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "Amsler, Charles", "project_titles": "Collaborative Research: Sea ice as a driver of Antarctic benthic macroalgal community composition and nearshore trophic connectivity", "projects": [{"proj_uid": "p0010104", "repository": "USAP-DC", "title": "Collaborative Research: Sea ice as a driver of Antarctic benthic macroalgal community composition and nearshore trophic connectivity"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -68.692085, "title": "Underwater video transect community analysis data", "uid": "601619", "west": -67.77137}, {"awards": "1739003 Holland, David", "bounds_geometry": ["POLYGON((-105 -75,-104.9 -75,-104.8 -75,-104.7 -75,-104.6 -75,-104.5 -75,-104.4 -75,-104.3 -75,-104.2 -75,-104.1 -75,-104 -75,-104 -75.042,-104 -75.084,-104 -75.126,-104 -75.168,-104 -75.21000000000001,-104 -75.252,-104 -75.294,-104 -75.336,-104 -75.378,-104 -75.42,-104.1 -75.42,-104.2 -75.42,-104.3 -75.42,-104.4 -75.42,-104.5 -75.42,-104.6 -75.42,-104.7 -75.42,-104.8 -75.42,-104.9 -75.42,-105 -75.42,-105 -75.378,-105 -75.336,-105 -75.294,-105 -75.252,-105 -75.21000000000001,-105 -75.168,-105 -75.126,-105 -75.084,-105 -75.042,-105 -75))"], "date_created": "Thu, 10 Nov 2022 00:00:00 GMT", "description": "Contained in this directory are the raw and processed data files along two transects, T1 and T2, in the grounding zone beneath Thwaites Eastern Ice Shelf, collected in January 2020 as apart of the ITGC MELT project. The code that converted raw data files to processed can be found at https://doi.org/10.5281/zenodo.7278005. Direct questions to Peter Washam at pw389@cornell.edu.", "east": -104.0, "geometry": ["POINT(-104.5 -75.21000000000001)"], "keywords": "Antarctica; Thwaites Glacier", "locations": "Antarctica; Thwaites Glacier", "north": -75.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Washam, Peter", "project_titles": null, "projects": null, "repositories": null, "science_programs": "Thwaites (ITGC)", "south": -75.42, "title": "Icefin raw and processed ice, seafloor, and hydrographic data beneath Thwaites Eastern Ice Shelf", "uid": "601618", "west": -105.0}, {"awards": "1933764 Enderlin, Ellyn", "bounds_geometry": ["POLYGON((-63.1 -65.2,-62.99 -65.2,-62.88 -65.2,-62.77 -65.2,-62.660000000000004 -65.2,-62.55 -65.2,-62.44 -65.2,-62.33 -65.2,-62.22 -65.2,-62.11 -65.2,-62 -65.2,-62 -65.24000000000001,-62 -65.28,-62 -65.32,-62 -65.36,-62 -65.4,-62 -65.44,-62 -65.47999999999999,-62 -65.52,-62 -65.56,-62 -65.6,-62.11 -65.6,-62.22 -65.6,-62.33 -65.6,-62.44 -65.6,-62.55 -65.6,-62.660000000000004 -65.6,-62.77 -65.6,-62.88 -65.6,-62.99 -65.6,-63.1 -65.6,-63.1 -65.56,-63.1 -65.52,-63.1 -65.47999999999999,-63.1 -65.44,-63.1 -65.4,-63.1 -65.36,-63.1 -65.32,-63.1 -65.28,-63.1 -65.24000000000001,-63.1 -65.2))"], "date_created": "Mon, 24 Oct 2022 00:00:00 GMT", "description": "This dataset contains observed and modeled conditions along the Crane Glacier centerline for ~1994\u20142100. Observations include centerline (cl) coordinates, downscaled RACMO climate variables (runoff, snowfall, snowmelt, and surface mass balance), bed elevations (b), surface elevations (h), glacier width (W), calving front positions (xcf), and surface speeds (U) when available for the 1994\u20142019 period. Modeling results include glacier centerline geometry, speed, glacier mass discharge (Q_gl), and calving front and grounding line positions (x_cf and x_gl) under different future climate scenarios with varying surface mass balance (SMB), ocean thermal forcing (FT), SMB with potential feedbacks associated with enhanced surface melt water discharge and plume strengthening (SMB_enh), and concurrent SMB_enh and FT perturbations (SMB_enh_FT). Data are in \u201c.mat\u201d format, which can be read using MATLAB\u2019s \u201cload\u201d function or using Python with the Scipy \u201cscipy.io.loadmat\u201d function. ", "east": -62.0, "geometry": ["POINT(-62.55 -65.4)"], "keywords": "Antarctica; Antarctic Peninsula; Crane Glacier; Glacier Dynamics; Glacier Mass Discharge; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Modeling; Model Output", "locations": "Crane Glacier; Antarctica; Antarctic Peninsula", "north": -65.2, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Aberle, Rainey; Enderlin, Ellyn; Marshall, Hans-Peter; Kopera, Michal; Meehan, Tate", "project_titles": "Antarctic Submarine Melt Variability from Remote Sensing of Icebergs", "projects": [{"proj_uid": "p0010210", "repository": "USAP-DC", "title": "Antarctic Submarine Melt Variability from Remote Sensing of Icebergs"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.6, "title": "Crane Glacier centerline observations and modeling results ", "uid": "601617", "west": -63.1}, {"awards": "1643248 Hall, Brenda", "bounds_geometry": ["POLYGON((163 -78.2,163.05 -78.2,163.1 -78.2,163.15 -78.2,163.2 -78.2,163.25 -78.2,163.3 -78.2,163.35 -78.2,163.4 -78.2,163.45 -78.2,163.5 -78.2,163.5 -78.21000000000001,163.5 -78.22,163.5 -78.23,163.5 -78.24,163.5 -78.25,163.5 -78.26,163.5 -78.27,163.5 -78.28,163.5 -78.28999999999999,163.5 -78.3,163.45 -78.3,163.4 -78.3,163.35 -78.3,163.3 -78.3,163.25 -78.3,163.2 -78.3,163.15 -78.3,163.1 -78.3,163.05 -78.3,163 -78.3,163 -78.28999999999999,163 -78.28,163 -78.27,163 -78.26,163 -78.25,163 -78.24,163 -78.23,163 -78.22,163 -78.21000000000001,163 -78.2))"], "date_created": "Fri, 21 Oct 2022 00:00:00 GMT", "description": "This dataset includes beryllium-10 surface exposure data collected in conjunction with a glacial history project in the Walcott Bay region of southern McMurdo Sound. The data are presented in the conventional CRONUS input format.", "east": 163.5, "geometry": ["POINT(163.25 -78.25)"], "keywords": "Antarctica; Beryllium-10; Exposure Age; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; McMurdo Sound; Royal Society Range; Walcott Glacier", "locations": "Antarctica; Royal Society Range; Walcott Glacier; Royal Society Range; McMurdo Sound", "north": -78.2, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Hall, Brenda", "project_titles": "Response of the Antarctic Ice Sheet to the last great global warming", "projects": [{"proj_uid": "p0010301", "repository": "USAP-DC", "title": "Response of the Antarctic Ice Sheet to the last great global warming"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.3, "title": "Walcott Glacier Exposure Data", "uid": "601616", "west": 163.0}, {"awards": "1643248 Hall, Brenda", "bounds_geometry": ["POLYGON((163.2 -78.1,163.26 -78.1,163.32 -78.1,163.38 -78.1,163.44 -78.1,163.5 -78.1,163.56 -78.1,163.62 -78.1,163.68 -78.1,163.74 -78.1,163.8 -78.1,163.8 -78.11999999999999,163.8 -78.14,163.8 -78.16,163.8 -78.17999999999999,163.8 -78.19999999999999,163.8 -78.22,163.8 -78.24,163.8 -78.25999999999999,163.8 -78.28,163.8 -78.3,163.74 -78.3,163.68 -78.3,163.62 -78.3,163.56 -78.3,163.5 -78.3,163.44 -78.3,163.38 -78.3,163.32 -78.3,163.26 -78.3,163.2 -78.3,163.2 -78.28,163.2 -78.25999999999999,163.2 -78.24,163.2 -78.22,163.2 -78.19999999999999,163.2 -78.17999999999999,163.2 -78.16,163.2 -78.14,163.2 -78.11999999999999,163.2 -78.1))"], "date_created": "Tue, 18 Oct 2022 00:00:00 GMT", "description": "This dataset contains radiocarbon dates of subfossil algal mats associated with Ross Sea drift near Walcott and Howchin Glaciers, southern Royal Society Range. These dates constrain the age of Ross Sea drift in this region. ", "east": 163.8, "geometry": ["POINT(163.5 -78.19999999999999)"], "keywords": "Algae; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Howchin Glacier; Radiocarbon; Radiocarbon Dates; Ross Sea Drift; Royal Society Range; Walcott Glacier", "locations": "Royal Society Range; Ross Sea Drift; Walcott Glacier; Antarctica; Howchin Glacier", "north": -78.1, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Hall, Brenda", "project_titles": "Response of the Antarctic Ice Sheet to the last great global warming", "projects": [{"proj_uid": "p0010301", "repository": "USAP-DC", "title": "Response of the Antarctic Ice Sheet to the last great global warming"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.3, "title": "Walcott Glacier area radiocarbon data", "uid": "601615", "west": 163.2}, {"awards": "1643248 Hall, Brenda", "bounds_geometry": ["POLYGON((163 -78.1,163.07 -78.1,163.14 -78.1,163.21 -78.1,163.28 -78.1,163.35 -78.1,163.42 -78.1,163.48999999999998 -78.1,163.56 -78.1,163.63 -78.1,163.7 -78.1,163.7 -78.13,163.7 -78.16,163.7 -78.19,163.7 -78.22,163.7 -78.25,163.7 -78.28,163.7 -78.31,163.7 -78.34,163.7 -78.37,163.7 -78.4,163.63 -78.4,163.56 -78.4,163.48999999999998 -78.4,163.42 -78.4,163.35 -78.4,163.28 -78.4,163.21 -78.4,163.14 -78.4,163.07 -78.4,163 -78.4,163 -78.37,163 -78.34,163 -78.31,163 -78.28,163 -78.25,163 -78.22,163 -78.19,163 -78.16,163 -78.13,163 -78.1))"], "date_created": "Mon, 17 Oct 2022 00:00:00 GMT", "description": "This dataset contains radiocarbon dates of subfossil algal mats associated with Ross Sea drift in Pyramid Trough. These dates constrain the age of Ross Sea drift in this region. The dataset also includes dates of modern algae.", "east": 163.7, "geometry": ["POINT(163.35 -78.25)"], "keywords": "Algae; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Pyramid Trough; Radiocarbon; Radiocarbon Dates; Ross Sea Drift; Royal Society Range", "locations": "Antarctica; Pyramid Trough; Ross Sea Drift; Royal Society Range", "north": -78.1, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Hall, Brenda", "project_titles": "Response of the Antarctic Ice Sheet to the last great global warming", "projects": [{"proj_uid": "p0010301", "repository": "USAP-DC", "title": "Response of the Antarctic Ice Sheet to the last great global warming"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.4, "title": "Pyramid Trough Radiocarbon Data", "uid": "601614", "west": 163.0}, {"awards": "1834986 Ballard, Grant", "bounds_geometry": ["POLYGON((165 -77,165.5 -77,166 -77,166.5 -77,167 -77,167.5 -77,168 -77,168.5 -77,169 -77,169.5 -77,170 -77,170 -77.1,170 -77.2,170 -77.3,170 -77.4,170 -77.5,170 -77.6,170 -77.7,170 -77.8,170 -77.9,170 -78,169.5 -78,169 -78,168.5 -78,168 -78,167.5 -78,167 -78,166.5 -78,166 -78,165.5 -78,165 -78,165 -77.9,165 -77.8,165 -77.7,165 -77.6,165 -77.5,165 -77.4,165 -77.3,165 -77.2,165 -77.1,165 -77))"], "date_created": "Fri, 07 Oct 2022 00:00:00 GMT", "description": "These data are results from a novel multirobot path-planning method for conducting aerial surveys over large areas designed to make the best use of limited flight time. We implemented our planning algorithm with a team of drones to conduct multiple photographic aerial wildlife surveys of Cape Crozier, one of the largest Ad\u00e9lie penguin colonies in the world containing more than 300,000 nesting pairs. We used the same technique at the two smaller Ad\u00e9lie penguin colonies on Ross Island (Cape Bird and Cape Royds). At Cape Crozier, over 2 square kilometers was surveyed in about 3 hours. In contrast, previous human-piloted single-drone surveys of the same colony required over 2 days to complete. The resulting data are geo-referenced, 3d images of penguin colonies created from the UAV imagery. Raw images were stitched together using Metashape (https://www.agisoft.com/).", "east": 170.0, "geometry": ["POINT(167.5 -77.5)"], "keywords": "Aerial Imagery; Aerial Survey; Antarctica; Biota; Geotiff; Penguin; Photo/video; Photo/Video; Population Count; Ross Island; UAV", "locations": "Antarctica; Ross Island", "north": -77.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Ballard, Grant; Schmidt, Annie; Shah, Kunal", "project_titles": "Does Nest Density Matter? Using Novel Technology to Collect Whole-colony Data on Adelie Penguins.", "projects": [{"proj_uid": "p0010178", "repository": "USAP-DC", "title": "Does Nest Density Matter? Using Novel Technology to Collect Whole-colony Data on Adelie Penguins."}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Orthomosaics of Ross Island Penguin Colonies 2019 - 2021", "uid": "601612", "west": 165.0}, {"awards": "1744550 Amsler, Charles", "bounds_geometry": ["POLYGON((-67.77137 -64.77195,-67.3795463 -64.77195,-66.9877226 -64.77195,-66.59589890000001 -64.77195,-66.2040752 -64.77195,-65.8122515 -64.77195,-65.4204278 -64.77195,-65.0286041 -64.77195,-64.6367804 -64.77195,-64.2449567 -64.77195,-63.853133 -64.77195,-63.853133 -65.16396350000001,-63.853133 -65.555977,-63.853133 -65.9479905,-63.853133 -66.34000400000001,-63.853133 -66.73201750000001,-63.853133 -67.124031,-63.853133 -67.5160445,-63.853133 -67.90805800000001,-63.853133 -68.3000715,-63.853133 -68.692085,-64.2449567 -68.692085,-64.6367804 -68.692085,-65.0286041 -68.692085,-65.4204278 -68.692085,-65.8122515 -68.692085,-66.2040752 -68.692085,-66.59589890000001 -68.692085,-66.9877226 -68.692085,-67.3795463 -68.692085,-67.77137 -68.692085,-67.77137 -68.3000715,-67.77137 -67.90805800000001,-67.77137 -67.5160445,-67.77137 -67.124031,-67.77137 -66.73201750000001,-67.77137 -66.34000400000001,-67.77137 -65.9479905,-67.77137 -65.555977,-67.77137 -65.16396350000001,-67.77137 -64.77195))"], "date_created": "Fri, 23 Sep 2022 00:00:00 GMT", "description": "This dataset consists of underwater videos of transects along the benthos at 14 sites between the Joubin Islands in the north and the Terra Firma Islands in the south. These were used for community analyses of the benthic communities. ", "east": -63.853133, "geometry": ["POINT(-65.8122515 -66.73201750000001)"], "keywords": "Antarctica; Antarctic Peninsula; Benthic Communities; Biota; Macroalgae; Macroinvertebrates; Oceans; Video Transects", "locations": "Antarctica; Antarctic Peninsula", "north": -64.77195, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Amsler, Charles", "project_titles": "Collaborative Research: Sea ice as a driver of Antarctic benthic macroalgal community composition and nearshore trophic connectivity", "projects": [{"proj_uid": "p0010104", "repository": "USAP-DC", "title": "Collaborative Research: Sea ice as a driver of Antarctic benthic macroalgal community composition and nearshore trophic connectivity"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -68.692085, "title": "Underwater transect videos used for community analyses", "uid": "601610", "west": -67.77137}, {"awards": "1644159 Jacobs, Stanley; 1644118 Dunbar, Robert", "bounds_geometry": ["POLYGON((-108 -73,-107.1 -73,-106.2 -73,-105.3 -73,-104.4 -73,-103.5 -73,-102.6 -73,-101.7 -73,-100.8 -73,-99.9 -73,-99 -73,-99 -73.3,-99 -73.6,-99 -73.9,-99 -74.2,-99 -74.5,-99 -74.8,-99 -75.1,-99 -75.4,-99 -75.7,-99 -76,-99.9 -76,-100.8 -76,-101.7 -76,-102.6 -76,-103.5 -76,-104.4 -76,-105.3 -76,-106.2 -76,-107.1 -76,-108 -76,-108 -75.7,-108 -75.4,-108 -75.1,-108 -74.8,-108 -74.5,-108 -74.2,-108 -73.9,-108 -73.6,-108 -73.3,-108 -73))"], "date_created": "Fri, 23 Sep 2022 00:00:00 GMT", "description": "Seawater d18O and hydrographic data (temperature, salinity, oxygen where available) for 5 cruises to the Amundsen Sea in 2000, 2007, 2009, 2019, 2020", "east": -99.0, "geometry": ["POINT(-103.5 -74.5)"], "keywords": "Amundsen Sea; Antarctica; Chemistry:Water; CTD; D18O; NBP0001; NBP0702; NBP0901; NBP1901; NBP2002; Oceans; Oxygen Isotope; R/v Nathaniel B. Palmer; Seawater Isotope; Southern Ocean", "locations": "Antarctica; Antarctica; Amundsen Sea; Southern Ocean", "north": -73.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences; Antarctic Ocean and Atmospheric Sciences", "persons": "Hennig, Andrew", "project_titles": "Estimation of Antarctic Ice Melt using Stable Isotopic Analyses of Seawater; West Antarctic Ice Shelf- Ocean Interactions ", "projects": [{"proj_uid": "p0010380", "repository": "USAP-DC", "title": "Estimation of Antarctic Ice Melt using Stable Isotopic Analyses of Seawater"}, {"proj_uid": "p0010208", "repository": "USAP-DC", "title": "West Antarctic Ice Shelf- Ocean Interactions "}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -76.0, "title": "Antarctic Seawater d18O isotope data from SE Amundsen Sea: 2000, 2007, 2009, 2019, 2020", "uid": "601611", "west": -108.0}, {"awards": "1744562 Loose, Brice; 1341717 Ackley, Stephen", "bounds_geometry": ["POLYGON((-180 -71,-179.9 -71,-179.8 -71,-179.7 -71,-179.6 -71,-179.5 -71,-179.4 -71,-179.3 -71,-179.2 -71,-179.1 -71,-179 -71,-179 -71.7,-179 -72.4,-179 -73.1,-179 -73.8,-179 -74.5,-179 -75.2,-179 -75.9,-179 -76.6,-179 -77.3,-179 -78,-179.1 -78,-179.2 -78,-179.3 -78,-179.4 -78,-179.5 -78,-179.6 -78,-179.7 -78,-179.8 -78,-179.9 -78,180 -78,177.5 -78,175 -78,172.5 -78,170 -78,167.5 -78,165 -78,162.5 -78,160 -78,157.5 -78,155 -78,155 -77.3,155 -76.6,155 -75.9,155 -75.2,155 -74.5,155 -73.8,155 -73.1,155 -72.4,155 -71.7,155 -71,157.5 -71,160 -71,162.5 -71,165 -71,167.5 -71,170 -71,172.5 -71,175 -71,177.5 -71,-180 -71))"], "date_created": "Thu, 15 Sep 2022 00:00:00 GMT", "description": "Discrete noble gases were collected by cold-welded copper tubes within the Amundsen and Ross Sea polynyas. ", "east": -179.0, "geometry": ["POINT(168 -74.5)"], "keywords": "Antarctica; Chemistry:fluid; Chemistry:Fluid; Mass Spectrometer; NBP1704; Noble Gas; Oceans; Ross Sea; R/v Nathaniel B. Palmer", "locations": "Antarctica; Ross Sea", "north": -71.0, "nsf_funding_programs": "Antarctic Integrated System Science; Antarctic Integrated System Science", "persons": "Loose, Brice", "project_titles": "Collaborative Research: Seasonal Sea Ice Production in the Ross Sea, Antarctica; Measuring Dissolved Gases to Reveal the Processes that Drive the Solubility Pump and Determine Gas Concentration in Antarctic Bottom Water", "projects": [{"proj_uid": "p0010032", "repository": "USAP-DC", "title": "Collaborative Research: Seasonal Sea Ice Production in the Ross Sea, Antarctica"}, {"proj_uid": "p0010376", "repository": "USAP-DC", "title": "Measuring Dissolved Gases to Reveal the Processes that Drive the Solubility Pump and Determine Gas Concentration in Antarctic Bottom Water"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "PIPERS Noble Gases", "uid": "601609", "west": 155.0}, {"awards": "2031442 Learman, Deric", "bounds_geometry": null, "date_created": "Thu, 08 Sep 2022 00:00:00 GMT", "description": "Shelf sediment samples were collected around the Antarctic Peninsular with the mega corer in 2020 (Nov. to Dec.). The sample locations and water depths are recorded in this dataset. These samples were used to collect data on organic matter (total organic carbon, total nitrogen, delta 13C (organic), delta 15N, and C to N ratios). Nutrient data (nitrate, nitrite, sulfate, and ammonia) and grain size analysis were collected on a subsample set (10). ", "east": null, "geometry": null, "keywords": "Antarctica; Antarctic Peninsula; Grain Size; Grain Size Analysis; Marine Geoscience; Marine Sediments; Organic Matter Geochemistry; Sediment Core Data; Shelf Sediments; Weddell Sea", "locations": "Weddell Sea; Antarctic Peninsula; Antarctica", "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Learman, Deric", "project_titles": "RAPID: Meta-genomic and Transcriptomic Investigation of Complex Organic Matter Degradation in Antarctic Benthic Sediments", "projects": [{"proj_uid": "p0010235", "repository": "USAP-DC", "title": "RAPID: Meta-genomic and Transcriptomic Investigation of Complex Organic Matter Degradation in Antarctic Benthic Sediments"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Physical and geochemical data from shelf sediments near the Antartic Pennisula", "uid": "601607", "west": null}, {"awards": "1744649 Christianson, Knut", "bounds_geometry": ["POLYGON((-120 -85.5,-116.67 -85.5,-113.34 -85.5,-110.01 -85.5,-106.68 -85.5,-103.35 -85.5,-100.02000000000001 -85.5,-96.69 -85.5,-93.36 -85.5,-90.03 -85.5,-86.7 -85.5,-86.7 -85.95,-86.7 -86.4,-86.7 -86.85,-86.7 -87.3,-86.7 -87.75,-86.7 -88.2,-86.7 -88.65,-86.7 -89.1,-86.7 -89.55,-86.7 -90,-90.03 -90,-93.36 -90,-96.69 -90,-100.02 -90,-103.35 -90,-106.68 -90,-110.01 -90,-113.34 -90,-116.67 -90,-120 -90,-120 -89.55,-120 -89.1,-120 -88.65,-120 -88.2,-120 -87.75,-120 -87.3,-120 -86.85,-120 -86.4,-120 -85.95,-120 -85.5))"], "date_created": "Wed, 07 Sep 2022 00:00:00 GMT", "description": "This dataset contains high-frequency impulse radar data collected at western Hercules Dome in East Antarctica. ", "east": -86.7, "geometry": ["POINT(-103.35 -87.75)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Ice Penetrating Radar; Snow/ice; Snow/Ice", "locations": "Antarctica", "north": -85.5, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Christianson, Knut", "project_titles": "Ice Dynamics at the Intersection of the West and East Antarctic Ice Sheets", "projects": [{"proj_uid": "p0010359", "repository": "USAP-DC", "title": "Ice Dynamics at the Intersection of the West and East Antarctic Ice Sheets"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Ice Dynamics at the Intersection of the West and East Antarctic Ice Sheets", "uid": "601606", "west": -120.0}, {"awards": "1744771 Balco, Gregory; 2138556 Halberstadt, Anna Ruth", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Fri, 02 Sep 2022 00:00:00 GMT", "description": "This dataset is a NetCDF file containing the results of a 5 MA ice sheet model run with parameter settings intended to suppress marine ice sheet instability processes. Uses the Penn State ice sheet model as described in DeConto et al. (2021) and Pollard \u0026 DeConto (2012). The model runs from 5 Ma to present and snapshots are recorded every 2000 years. Model grid resolution is 40 km. Only the model geometry (thickness, height, whether grounded) is saved in each snapshot. The purpose of the model run was to support a study into whether or not it is possible to distinguish models with different marine ice sheet instability parameterizations using geologic data. ", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Sheet Modeling; Marine Ice Margin Instability; Model Output", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Balco, Gregory; Buchband, Hannah; Halberstadt, Anna Ruth", "project_titles": "OPP-PRF: High-resolution Nested Antarctic Ice Sheet Modeling to Reconcile Marine and Terrestrial Geologic Data; Synoptic Evaluation of Long-Term Antarctic Ice Sheet Model Simulations using a Continent-Wide Database of Cosmogenic-Nuclide Measurements", "projects": [{"proj_uid": "p0010342", "repository": "USAP-DC", "title": "Synoptic Evaluation of Long-Term Antarctic Ice Sheet Model Simulations using a Continent-Wide Database of Cosmogenic-Nuclide Measurements"}, {"proj_uid": "p0010278", "repository": "USAP-DC", "title": "OPP-PRF: High-resolution Nested Antarctic Ice Sheet Modeling to Reconcile Marine and Terrestrial Geologic Data"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "5 million year transient Antarctic ice sheet model run with \"desensitized\" marine ice margin instabilities", "uid": "601601", "west": -180.0}, {"awards": "0733025 Blankenship, Donald", "bounds_geometry": ["POLYGON((153 -79,153.9 -79,154.8 -79,155.7 -79,156.6 -79,157.5 -79,158.4 -79,159.3 -79,160.2 -79,161.1 -79,162 -79,162 -79.14,162 -79.28,162 -79.42,162 -79.56,162 -79.7,162 -79.84,162 -79.98,162 -80.12,162 -80.26,162 -80.4,161.1 -80.4,160.2 -80.4,159.3 -80.4,158.4 -80.4,157.5 -80.4,156.6 -80.4,155.7 -80.4,154.8 -80.4,153.9 -80.4,153 -80.4,153 -80.26,153 -80.12,153 -79.98,153 -79.84,153 -79.7,153 -79.56,153 -79.42,153 -79.28,153 -79.14,153 -79))"], "date_created": "Fri, 02 Sep 2022 00:00:00 GMT", "description": "HiCARS data collected over Darwin and Hatherton Glaciers during ICECAP Test Flight ICP1/F05", "east": 162.0, "geometry": ["POINT(157.5 -79.7)"], "keywords": "Airborne Radar; Antarctica; Basler; Darwin Glacier; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Hatherton Glacier; Hicars; ICECAP; Ice Penetrating Radar; Ice Thickness; Transantarctic Mountains", "locations": "Darwin Glacier; Transantarctic Mountains; Hatherton Glacier; Antarctica", "north": -79.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Gillespie, Mette; Blankenship, Donald D.; Young, Duncan A.; Siegert, Martin; Holt, John W.; Greenbaum, Jamin; Schroeder, Dustin", "project_titles": "IPY Research: Investigating the Cryospheric Evolution of the Central Antarctic Plate (ICECAP)", "projects": [{"proj_uid": "p0000719", "repository": "USAP-DC", "title": "IPY Research: Investigating the Cryospheric Evolution of the Central Antarctic Plate (ICECAP)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.4, "title": "ICECAP ice thickness data over the Darwin and Hatherton Glaciers, Transantarctic Mountains, Antarctica", "uid": "601605", "west": 153.0}, {"awards": "2138556 Halberstadt, Anna Ruth; 1744771 Balco, Gregory", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Fri, 02 Sep 2022 00:00:00 GMT", "description": "This dataset is a NetCDF file containing the results of a 5 MA ice sheet model run with parameter settings intended to enhance marine ice sheet instability processes. Uses the Penn State ice sheet model as described in DeConto et al. (2021) and Pollard \u0026 DeConto (2012). The model runs from 5 Ma to present and snapshots are recorded every 2000 years. Model grid resolution is 40 km. Only the model geometry (thickness, height, whether grounded) is saved in each snapshot. The purpose of the model run was to support a study into whether or not it is possible to distinguish models with different marine ice sheet instability parameterizations using geologic data. \r\n", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Sheet Modeling; Marine Ice Margin Instability; Model Output", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Balco, Gregory; Buchband, Hannah; Halberstadt, Anna Ruth", "project_titles": "OPP-PRF: High-resolution Nested Antarctic Ice Sheet Modeling to Reconcile Marine and Terrestrial Geologic Data; Synoptic Evaluation of Long-Term Antarctic Ice Sheet Model Simulations using a Continent-Wide Database of Cosmogenic-Nuclide Measurements", "projects": [{"proj_uid": "p0010278", "repository": "USAP-DC", "title": "OPP-PRF: High-resolution Nested Antarctic Ice Sheet Modeling to Reconcile Marine and Terrestrial Geologic Data"}, {"proj_uid": "p0010342", "repository": "USAP-DC", "title": "Synoptic Evaluation of Long-Term Antarctic Ice Sheet Model Simulations using a Continent-Wide Database of Cosmogenic-Nuclide Measurements"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "5 million year transient Antarctic ice sheet model run with \"sensitized\" marine ice margin instabilities", "uid": "601602", "west": -180.0}, {"awards": "1043092 Steig, Eric; 1807522 Jones, Tyler", "bounds_geometry": ["POINT(-112.085 -79.467)"], "date_created": "Thu, 01 Sep 2022 00:00:00 GMT", "description": "We analyzed a continuous record of water-isotope ratios from the West Antarctic Ice Sheet (WAIS) Divide ice core to reveal summer and winter temperature changes through the last 11,000 years. ", "east": -112.085, "geometry": ["POINT(-112.085 -79.467)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core; Ice Core Records; Seasonality; Seasonal Temperatures; Temperature; Water Isotopes; West Antarctic Ice Sheet", "locations": "Antarctica; West Antarctic Ice Sheet", "north": -79.467, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Earth Sciences", "persons": "Jones, Tyler R.", "project_titles": "Collaborative Research: Stable Isotopes of Ice in the Transition and Glacial Sections of the WAIS Divide Deep Ice Core; Collaborative Research: Targeted resampling of deep polar ice cores using information theory", "projects": [{"proj_uid": "p0000078", "repository": "USAP-DC", "title": "Collaborative Research: Stable Isotopes of Ice in the Transition and Glacial Sections of the WAIS Divide Deep Ice Core"}, {"proj_uid": "p0010100", "repository": "USAP-DC", "title": "Collaborative Research: Targeted resampling of deep polar ice cores using information theory"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.467, "title": "Seasonal temperatures in West Antarctica during the Holocene ", "uid": "601603", "west": -112.085}, {"awards": "9319379 Blankenship, Donald", "bounds_geometry": ["POLYGON((150 -81.9,152.1 -81.9,154.2 -81.9,156.3 -81.9,158.4 -81.9,160.5 -81.9,162.6 -81.9,164.7 -81.9,166.8 -81.9,168.9 -81.9,171 -81.9,171 -82.06,171 -82.22,171 -82.38000000000001,171 -82.54,171 -82.7,171 -82.86,171 -83.02,171 -83.18,171 -83.34,171 -83.5,168.9 -83.5,166.8 -83.5,164.7 -83.5,162.6 -83.5,160.5 -83.5,158.4 -83.5,156.3 -83.5,154.2 -83.5,152.1 -83.5,150 -83.5,150 -83.34,150 -83.18,150 -83.02,150 -82.86,150 -82.7,150 -82.54,150 -82.38000000000001,150 -82.22,150 -82.06,150 -81.9))"], "date_created": "Thu, 01 Sep 2022 00:00:00 GMT", "description": "The RGB survey is a single line flown up Robb Glacier. Laser altimetry, ice-penetrating radar, gravity and magnetic field intensity data were collected. This work was funded by NSF-OPP 9319379 with the project title: Collaborative Research: Contrasting Architecture and Dynamics of the Transantarctic Mountains (Pensacola-Pole Transect). Principal Investigators were D.D. Blankenship, University of Texas Institute for Geophysics, and R.E. Bell and W.R. Buck, Lamont-Doherty Earth Observatory.", "east": 171.0, "geometry": ["POINT(160.5 -82.7)"], "keywords": "Airborne Radar; Antarctica; Bed Elevation; Geophysics; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Surface Elevation; Ice Thickness; Robb Glacier; Transantarctic Mountains", "locations": "Antarctica; Robb Glacier; Transantarctic Mountains", "north": -81.9, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Blankenship, Donald D.; Bell, Robin; Buck, W. Roger; Young, Duncan A.", "project_titles": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR)", "projects": [{"proj_uid": "p0000125", "repository": "USAP-DC", "title": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -83.5, "title": "RBG - Robb Glacier Survey", "uid": "601604", "west": 150.0}, {"awards": "1245821 Brook, Edward J.; 1246148 Severinghaus, Jeffrey; 1245659 Petrenko, Vasilii", "bounds_geometry": ["POLYGON((161 -77.7,161.1 -77.7,161.2 -77.7,161.3 -77.7,161.4 -77.7,161.5 -77.7,161.6 -77.7,161.7 -77.7,161.8 -77.7,161.9 -77.7,162 -77.7,162 -77.71000000000001,162 -77.72,162 -77.73,162 -77.74,162 -77.75,162 -77.76,162 -77.77,162 -77.78,162 -77.78999999999999,162 -77.8,161.9 -77.8,161.8 -77.8,161.7 -77.8,161.6 -77.8,161.5 -77.8,161.4 -77.8,161.3 -77.8,161.2 -77.8,161.1 -77.8,161 -77.8,161 -77.78999999999999,161 -77.78,161 -77.77,161 -77.76,161 -77.75,161 -77.74,161 -77.73,161 -77.72,161 -77.71000000000001,161 -77.7))"], "date_created": "Tue, 23 Aug 2022 00:00:00 GMT", "description": "High-precision carbon isotope data (d13C-CO2) show atmospheric CO2 during Marine Isotope Stage 4 (MIS 4, ~70.5-59 ka) was controlled by a succession of millennial-scale processes. Enriched d13C-CO2 during peak glaciation suggests increased ocean carbon storage. Variations in d13C-CO2 in early MIS4 suggest multiple processes were active during CO2 drawdown, potentially including decreased land carbon and decreased Southern Ocean air-sea gas exchange superposed on increased ocean carbon storage. CO2 remained low during MIS 4 while d13C-CO2 fluctuations suggest changes in Southern Ocean and North Atlantic air-sea gas exchange. A 7 ppm increase in CO2 at the onset of Dansgaard-Oeschger event 19 (72.1 ka) and a 22 ppm increase in CO2 during late MIS 4 (Heinrich Stadial 6, ~63.5-60 ka) involved additions of isotopically light carbon to the atmosphere. The terrestrial biosphere and Southern Ocean air-sea gas exchange are possible sources, with the latter event also involving decreased ocean carbon storage.", "east": 162.0, "geometry": ["POINT(161.5 -77.75)"], "keywords": "Antarctica; Taylor Glacier", "locations": "Antarctica; Taylor Glacier", "north": -77.7, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology", "persons": "Menking, James; Shackleton, Sarah; Bauska, Thomas; Buffen, Aron; Brook, Edward J.; Barker, Stephen; Severinghaus, Jeffrey P.; Dyonisius, Michael; Petrenko, Vasilii; Menking, Andy", "project_titles": "Collaborative Research: The Taylor Glacier, Antarctica, Horizontal Ice Core: Exploring changes in the Natural Methane Budget in a Warming World and Expanding the Paleo-archive", "projects": [{"proj_uid": "p0000283", "repository": "USAP-DC", "title": "Collaborative Research: The Taylor Glacier, Antarctica, Horizontal Ice Core: Exploring changes in the Natural Methane Budget in a Warming World and Expanding the Paleo-archive"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.8, "title": "Taylor Glacier CO2 Isotope Data 74-59 kyr", "uid": "601600", "west": 161.0}, {"awards": "1643664 Severinghaus, Jeffrey", "bounds_geometry": null, "date_created": "Tue, 16 Aug 2022 00:00:00 GMT", "description": "This data set consists of high-precision krypton and argon isotope measurements, along with 15N and 18O of O2. This data tests the hypothesis that the 2nd order parameter 86Krexcess (86Kr/82Kr - 40Ar/36Ar) serves as a proxy indicator of past storminess, via atmospheric pressure changes that cause barometric pumping in the firn and hence greater gravitational disequilibrium in the heavier Kr atom than in Ar. These measurements were made as part of the US-Australian Law Dome DE08-OH campaign in 2018-2019. Nitrogen and dioxygen isotopes were also measured.", "east": null, "geometry": null, "keywords": "Antarctica; Ice Core; Law Dome; Noble Gas", "locations": "Law Dome; Antarctica", "north": null, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Severinghaus, Jeffrey P.", "project_titles": "Collaborative Research: Reconstructing Carbon-14 of Atmospheric Carbon Monoxide from Law Dome, Antarctica to Constrain Long-Term Hydroxyl Radical Variability", "projects": [{"proj_uid": "p0010341", "repository": "USAP-DC", "title": "Collaborative Research: Reconstructing Carbon-14 of Atmospheric Carbon Monoxide from Law Dome, Antarctica to Constrain Long-Term Hydroxyl Radical Variability"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Law Dome DE08-OH site noble gases in ice: testing the 86Krexcess proxy", "uid": "601597", "west": null}, {"awards": "1543344 Soreghan, Gerilyn", "bounds_geometry": ["POLYGON((162.322717 -77.417633,162.444362 -77.417633,162.566007 -77.417633,162.687652 -77.417633,162.80929700000002 -77.417633,162.93094200000002 -77.417633,163.052587 -77.417633,163.174232 -77.417633,163.295877 -77.417633,163.417522 -77.417633,163.539167 -77.417633,163.539167 -77.4501507,163.539167 -77.4826684,163.539167 -77.5151861,163.539167 -77.5477038,163.539167 -77.5802215,163.539167 -77.61273920000001,163.539167 -77.6452569,163.539167 -77.6777746,163.539167 -77.7102923,163.539167 -77.74281,163.417522 -77.74281,163.295877 -77.74281,163.174232 -77.74281,163.052587 -77.74281,162.93094200000002 -77.74281,162.80929700000002 -77.74281,162.687652 -77.74281,162.566007 -77.74281,162.444362 -77.74281,162.322717 -77.74281,162.322717 -77.7102923,162.322717 -77.6777746,162.322717 -77.6452569,162.322717 -77.61273920000001,162.322717 -77.5802215,162.322717 -77.5477038,162.322717 -77.5151861,162.322717 -77.4826684,162.322717 -77.4501507,162.322717 -77.417633))"], "date_created": "Tue, 16 Aug 2022 00:00:00 GMT", "description": "This data file contains locations and descriptions of the samples collected for the NSF project titled \"Quantifying surface area in muds from the Antarctic Dry Valleys: Implications for weathering in glacial systems\". Data collected includes BET surface area, LPSA grain size, granulometry, mineralogy (XRD) and whole rock geochemistry (ICP-MS).", "east": 163.539167, "geometry": ["POINT(162.93094200000002 -77.5802215)"], "keywords": "Antarctica; Anza Borrego; Iceland; McMurdo Dry Valleys; Norway; Peru; Puerto Rico; Taylor Valley; Washington; Wright Valley", "locations": "Taylor Valley; Antarctica; Anza Borrego; Puerto Rico; Iceland; Washington; Antarctica; Wright Valley; McMurdo Dry Valleys; Peru; Norway", "north": -77.417633, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Demirel-Floyd, Cansu", "project_titles": "Quantifying surface area in muds from the Antarctic Dry Valleys: Implications for weathering in glacial systems", "projects": [{"proj_uid": "p0010181", "repository": "USAP-DC", "title": "Quantifying surface area in muds from the Antarctic Dry Valleys: Implications for weathering in glacial systems"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.74281, "title": "Data and metadata for \"Quantifying surface area in muds from the Antarctic Dry Valleys: Implications for weathering in glacial systems\"", "uid": "601599", "west": 162.322717}, {"awards": "1643664 Severinghaus, Jeffrey", "bounds_geometry": null, "date_created": "Tue, 16 Aug 2022 00:00:00 GMT", "description": "This data set comprises measurements of noble and inert gases in the firn at the DE08-OH site sampled in 2018-2019 near the summit of Law Dome, Antarctica. The data show the expected gravitational enrichment of heavy isotopes with depth, somewhat attenuated by the high accumulation rate and a near-surface well-mixed zone (convective zone), and the \"lock-in\" horizon at 68 m depth. As seen at many other sites, the heavy isotope of oxygen 18O is depleted progressively with depth within the lock-in zone due to faster gas permeation of 16O16O relative to 18O16O from compressed air bubbles.", "east": null, "geometry": null, "keywords": "Antarctica; Firn; Firn Density; Gravitational Settling; Inert Gases; Law Dome", "locations": "Law Dome; Antarctica", "north": null, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Severinghaus, Jeffrey P.", "project_titles": "Collaborative Research: Reconstructing Carbon-14 of Atmospheric Carbon Monoxide from Law Dome, Antarctica to Constrain Long-Term Hydroxyl Radical Variability", "projects": [{"proj_uid": "p0010341", "repository": "USAP-DC", "title": "Collaborative Research: Reconstructing Carbon-14 of Atmospheric Carbon Monoxide from Law Dome, Antarctica to Constrain Long-Term Hydroxyl Radical Variability"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Law Dome DE08-OH firn air 15N, O2/N2, Ar/N2, 18O of O2", "uid": "601598", "west": null}, {"awards": "2042495 Blackburn, Terrence", "bounds_geometry": null, "date_created": "Wed, 10 Aug 2022 00:00:00 GMT", "description": "This file includes U-series isotopic and 234U/230Th chronologic data from two chemical precipitates deposited beneath the Antarctic Ice Sheet. Precipitate mineral compositions consist of opal and calcite layers. Sample MA113 was found at Mount Achernar moraine (84.2\u00b0S, 161\u00b0E), and sample PRR50489 was found at Elephant Moraine (76.3\u00b0S, 157.3\u00b0E).", "east": null, "geometry": null, "keywords": "Antarctica; East Antarctica", "locations": "Antarctica; East Antarctica", "north": null, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Piccione, Gavin; Blackburn, Terrence", "project_titles": "Collaborative Research: Reconstructing East Antarctica\u2019s Past Response to Climate using Subglacial Precipitates", "projects": [{"proj_uid": "p0010192", "repository": "USAP-DC", "title": "Collaborative Research: Reconstructing East Antarctica\u2019s Past Response to Climate using Subglacial Precipitates"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Subglacial Precipitates Record Antarctic Ice Sheet Response to Pleistocene Millennial Climate Cycles", "uid": "601594", "west": null}, {"awards": "1903681 Brook, Edward J.", "bounds_geometry": ["POLYGON((161.745 -77.745,161.746 -77.745,161.747 -77.745,161.748 -77.745,161.749 -77.745,161.75 -77.745,161.751 -77.745,161.752 -77.745,161.753 -77.745,161.754 -77.745,161.755 -77.745,161.755 -77.74600000000001,161.755 -77.747,161.755 -77.748,161.755 -77.749,161.755 -77.75,161.755 -77.751,161.755 -77.752,161.755 -77.753,161.755 -77.75399999999999,161.755 -77.755,161.754 -77.755,161.753 -77.755,161.752 -77.755,161.751 -77.755,161.75 -77.755,161.749 -77.755,161.748 -77.755,161.747 -77.755,161.746 -77.755,161.745 -77.755,161.745 -77.75399999999999,161.745 -77.753,161.745 -77.752,161.745 -77.751,161.745 -77.75,161.745 -77.749,161.745 -77.748,161.745 -77.747,161.745 -77.74600000000001,161.745 -77.745))"], "date_created": "Tue, 02 Aug 2022 00:00:00 GMT", "description": "Measurements of the isotopic composition of atmospheric nitrous oxide from samples from the Taylor Glacier, Antarctica, spanning the last deglaciation (21-11 ka) and part of the last glacial period (40 to 36 ka). Data set includes the site preference of 15-N in N2O. A manuscript describing these data is currently in preparation. Data are referenced to in house air standards at OSU which are currently being cross calibrated with other laboratories. ", "east": 161.755, "geometry": ["POINT(161.75 -77.75)"], "keywords": "Antarctica; Nitrous Oxide; Taylor Glacier", "locations": "Antarctica; Taylor Glacier", "north": -77.745, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Menking, Andy; Brook, Edward J.", "project_titles": "Deciphering Changes in Atmospheric Nitrous Oxide Concentration During the Last Ice Age Using the Intramolecular Site-Preference of Nitrogen Isotopes", "projects": [{"proj_uid": "p0010465", "repository": "USAP-DC", "title": "Deciphering Changes in Atmospheric Nitrous Oxide Concentration During the Last Ice Age Using the Intramolecular Site-Preference of Nitrogen Isotopes"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.755, "title": "Preliminary nitrous oxide site preference isotopic data for last deglaciation from Taylor Glacier", "uid": "601592", "west": 161.745}, {"awards": "2002422 TBD", "bounds_geometry": ["POLYGON((159 -75.67,159.025 -75.67,159.05 -75.67,159.075 -75.67,159.1 -75.67,159.125 -75.67,159.15 -75.67,159.175 -75.67,159.2 -75.67,159.225 -75.67,159.25 -75.67,159.25 -75.786,159.25 -75.902,159.25 -76.018,159.25 -76.134,159.25 -76.25,159.25 -76.366,159.25 -76.482,159.25 -76.598,159.25 -76.714,159.25 -76.83,159.225 -76.83,159.2 -76.83,159.175 -76.83,159.15 -76.83,159.125 -76.83,159.1 -76.83,159.075 -76.83,159.05 -76.83,159.025 -76.83,159 -76.83,159 -76.714,159 -76.598,159 -76.482,159 -76.366,159 -76.25,159 -76.134,159 -76.018,159 -75.902,159 -75.786,159 -75.67))"], "date_created": "Tue, 02 Aug 2022 00:00:00 GMT", "description": "This file includes the clumped-isotope composition (18O18O) molecular oxygen (O2) that is in the trapped air from the S27 ice core collected in Allan Hills Blue Ice Area.", "east": 159.25, "geometry": ["POINT(159.125 -76.25)"], "keywords": "Allan Hills; Antarctica; Last Interglacial; Oxygen", "locations": "Allan Hills; Antarctica", "north": -75.67, "nsf_funding_programs": null, "persons": "Yan, Yuzhen; Yeung, Laurence; Banerjee, Asmita", "project_titles": null, "projects": null, "repositories": null, "science_programs": "Allan Hills", "south": -76.83, "title": "Clumped-isotope composition of molecular oxygen trapped in the Allan Hills S27 ice core", "uid": "601593", "west": 159.0}, {"awards": "1654922 de la Pena, Santiago", "bounds_geometry": ["POLYGON((-180 -89.99,-144 -89.99,-108 -89.99,-72 -89.99,-36 -89.99,0 -89.99,36 -89.99,72 -89.99,108 -89.99,144 -89.99,180 -89.99,180 -89.991,180 -89.99199999999999,180 -89.993,180 -89.994,180 -89.995,180 -89.996,180 -89.997,180 -89.998,180 -89.999,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -89.999,-180 -89.998,-180 -89.997,-180 -89.996,-180 -89.995,-180 -89.994,-180 -89.993,-180 -89.99199999999999,-180 -89.991,-180 -89.99))"], "date_created": "Thu, 28 Jul 2022 00:00:00 GMT", "description": "An instrument suite composed of weather sensors and a set of \u0027SnowFox\u0027 Gamma Ray neutron counters used to estimate the water equivalence of snow accumulation, measured continuously between December 2017 and January 2020. ", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Accumulation; Antarctica; Snow; South Pole; Surface Mass Balance", "locations": "Antarctica; South Pole; Antarctica", "north": -89.99, "nsf_funding_programs": "Antarctic Astrophysics and Geospace Sciences", "persons": "de la Pe\u00f1a, Santiago", "project_titles": "EAGER: An Operational System to Measure Surface Mass Balance Deep in the Interior of the Antarctic Ice Sheet", "projects": [{"proj_uid": "p0010360", "repository": "USAP-DC", "title": "EAGER: An Operational System to Measure Surface Mass Balance Deep in the Interior of the Antarctic Ice Sheet"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": " South Pole Weather and Accumulation Measurements 2017-2020", "uid": "601591", "west": -180.0}, {"awards": "9319379 Blankenship, Donald", "bounds_geometry": ["POLYGON((-180 -75,-172 -75,-164 -75,-156 -75,-148 -75,-140 -75,-132 -75,-124 -75,-116 -75,-108 -75,-100 -75,-100 -76.5,-100 -78,-100 -79.5,-100 -81,-100 -82.5,-100 -84,-100 -85.5,-100 -87,-100 -88.5,-100 -90,-108 -90,-116 -90,-124 -90,-132 -90,-140 -90,-148 -90,-156 -90,-164 -90,-172 -90,180 -90,172 -90,164 -90,156 -90,148 -90,140 -90,132 -90,124 -90,116 -90,108 -90,100 -90,100 -88.5,100 -87,100 -85.5,100 -84,100 -82.5,100 -81,100 -79.5,100 -78,100 -76.5,100 -75,108 -75,116 -75,124 -75,132 -75,140 -75,148 -75,156 -75,164 -75,172 -75,-180 -75))"], "date_created": "Sun, 24 Jul 2022 00:00:00 GMT", "description": "These data represent the 1-km decimated version of the SOAR ice thickness data provided to the Bedmap2 project, collected as part of various projects between 1991 and 2001. It encompasses the Corridor Aerogeophysics of the South East Ross Zone (CASERTZ) surveys of the Byrd Subglacial Basin (BSB), Bindschadler Ice Stream (WAZ/TKD), and the upstream catchments of Kamb Ice Steam and Willians Ice Stream (IRE); targeted West Antarctic glaciology projects (IPB/WAZ/DVD/STI/LIV); corridors across the Transantarctic Mountains to South Pole (PPT) and Dome C (WLK); and a version of the Lake Vostok dataset (LVS). Data were collected as stacked log detected traces by the SOAR TUD IV system with an attached digitizer. The digitizer was significantly updated in 1997 (RTZ6). Data interpretation approaches can be found in Blankenship et al., 2001.\r\n\r\nData is in ASCII format. Transects are separated by GMT style segment headers with the transect name.\r\nColumns are:\r\n1. Year\r\n2. Day of Year\r\n3. Seconds of Day\r\n4. Longitude (degrees, WGS-84)\r\n5. Latitude (degrees, WGS-84)\r\n6. Easting (meters, EPSG 3031; Polar Stereographic with true scale at 71\u02daS)\r\n7. Northing (meters, EPSG 3031; Polar Stereographic with true scale at 71\u02daS)\r\n8. Surface Elevation (meters, WGS-84) - derived where possible from laser data\r\n9. Ice thickness (meters, using a speed of light in air of 299705000 m/s and a refractive index of 1.78; no firn correction)\r\n10. Bed Elevation (meters, WGS-84) - column 8 minus column 9\r\n11. The transect name formatted by Project/Set/Transect\r\n", "east": 100.0, "geometry": ["POINT(-180 -82.5)"], "keywords": "Antarctica; Ice Penetrating Radar; Ice Thickness; SOAR", "locations": "Antarctica; Antarctica", "north": -75.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Blankenship, Donald D.; Young, Duncan A.; Kempf, Scott D.", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -90.0, "title": "Support Office for Airborne Research 1 km sampled ice thickness data", "uid": "601588", "west": -100.0}, {"awards": "1644277 Aschwanden, Andy", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Thu, 14 Jul 2022 00:00:00 GMT", "description": "A Python/numpy plugin for QGIS by Andy Aschwanden and Constantine Khrulev that implements the Linear Theory of Orographic Precipitation following Smith \u0026 Barstad (2004).", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Aschwanden, Andy", "project_titles": "Collaborative Research: Feedbacks between Orographic Precipitation and Ice Dynamics", "projects": [{"proj_uid": "p0010348", "repository": "USAP-DC", "title": "Collaborative Research: Feedbacks between Orographic Precipitation and Ice Dynamics"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Linear Theory of Orographic Precipitation QGIS Plugin", "uid": "601590", "west": -180.0}, {"awards": "1644277 Aschwanden, Andy", "bounds_geometry": null, "date_created": "Thu, 14 Jul 2022 00:00:00 GMT", "description": "The Parallel Ice Sheet Model (PISM) is an open-source ice sheet model distributed under GPL-3.0. This version includes the orographic precipitation module and other improvements produced under NSF award 1644277.", "east": null, "geometry": null, "keywords": "Antarctica", "locations": "Antarctica", "north": null, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Aschwanden, Andy", "project_titles": "Collaborative Research: Feedbacks between Orographic Precipitation and Ice Dynamics", "projects": [{"proj_uid": "p0010348", "repository": "USAP-DC", "title": "Collaborative Research: Feedbacks between Orographic Precipitation and Ice Dynamics"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Parallel Ice Sheet Model (PISM) v2", "uid": "601589", "west": null}, {"awards": "1246463 Burns, Jennifer", "bounds_geometry": ["POLYGON((162 -75,162.6 -75,163.2 -75,163.8 -75,164.4 -75,165 -75,165.6 -75,166.2 -75,166.8 -75,167.4 -75,168 -75,168 -75.4,168 -75.8,168 -76.2,168 -76.6,168 -77,168 -77.4,168 -77.8,168 -78.2,168 -78.6,168 -79,167.4 -79,166.8 -79,166.2 -79,165.6 -79,165 -79,164.4 -79,163.8 -79,163.2 -79,162.6 -79,162 -79,162 -78.6,162 -78.2,162 -77.8,162 -77.4,162 -77,162 -76.6,162 -76.2,162 -75.8,162 -75.4,162 -75))"], "date_created": "Tue, 05 Jul 2022 00:00:00 GMT", "description": "The profound impacts that maternal provisioning of finite energy resources has on offspring survival have been extensively studied across mammals. However, in addition to calories, we tested whether high hemoprotein concentrations in diving mammals necessitates exceptional female-to-pup iron transfer. To answer this question adult female Weddell seals (Leptonychotes weddellii) were handled across the austral summer. This included post-partum females during lactation and post-weaning. To demonstrate that any observed changes in iron dynamics were due to lactation, equivalent skip-breeding females (i.e., that did not produce a pup) were also handled. We measured numerous indices of iron mobilization (ferritin, serum iron, total-iron-binding-capacity, transferrin saturation, milk iron concentration), hemoprotein concentrations, and oxygen stores.", "east": 168.0, "geometry": ["POINT(165 -77)"], "keywords": "Aerobic; Antarctica; Dive Capacity; Iron; McMurdo Sound; Weddell Seal", "locations": "Antarctica; McMurdo Sound", "north": -75.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Shero, Michelle", "project_titles": "Collaborative Research: Physiological and Genetic Correlates of Reproductive Success in High- versus Low-Quality Weddell seals; The Cost of A New Fur Coat: Interactions between Molt and Reproduction in Weddell Seals", "projects": [{"proj_uid": "p0000229", "repository": "USAP-DC", "title": "The Cost of A New Fur Coat: Interactions between Molt and Reproduction in Weddell Seals"}, {"proj_uid": "p0010369", "repository": "USAP-DC", "title": "Collaborative Research: Physiological and Genetic Correlates of Reproductive Success in High- versus Low-Quality Weddell seals"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.0, "title": "Weddell seal iron dynamics and oxygen stores across lactation", "uid": "601587", "west": 162.0}, {"awards": "1543245 Rynearson, Tatiana", "bounds_geometry": ["POLYGON((-179 -59,-167.7 -59,-156.4 -59,-145.1 -59,-133.8 -59,-122.5 -59,-111.19999999999999 -59,-99.89999999999999 -59,-88.6 -59,-77.3 -59,-66 -59,-66 -60.9,-66 -62.8,-66 -64.7,-66 -66.6,-66 -68.5,-66 -70.4,-66 -72.3,-66 -74.2,-66 -76.1,-66 -78,-77.3 -78,-88.6 -78,-99.9 -78,-111.2 -78,-122.5 -78,-133.8 -78,-145.10000000000002 -78,-156.4 -78,-167.7 -78,-179 -78,-179 -76.1,-179 -74.2,-179 -72.3,-179 -70.4,-179 -68.5,-179 -66.6,-179 -64.7,-179 -62.8,-179 -60.900000000000006,-179 -59))"], "date_created": "Mon, 27 Jun 2022 00:00:00 GMT", "description": "This dataset includes records of the specific growth rates measured for 43 clonal diatom strains originally isolated during the research cruise NBP-1701 across the Pacific sector of the Southern Ocean during December 2016-January 2017. Strains were grown under continuous light (130 \u00b5mol m-2\u00a0s-1) at up to 8 temperatures that span all or most of each strain\u2019s thermal niche width, from 0-12 degrees C, which encompasses each strain\u2019s optimum temperature for growth. Strains have been molecularly identified to species via 18S Sanger sequencing. Data include the following information for each record: Internal lab strain reference ID, date collected, latitude, longitude, Southern Ocean region, species, tested temperature, replicate number and specific growth rate. Data are provided in comma-separated values (csv) format.", "east": -66.0, "geometry": ["POINT(-122.5 -68.5)"], "keywords": "Antarctica; Biota; NBP1701; Phytoplankton; R/v Nathaniel B. Palmer; Specific Growth Rate; Thermal Optimum Temperature", "locations": "Antarctica", "north": -59.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Bishop, Ian", "project_titles": "NSFGEO-NERC: Evolutionary Response of Southern Ocean Diatoms to Environmental Change", "projects": [{"proj_uid": "p0000850", "repository": "USAP-DC", "title": "NSFGEO-NERC: Evolutionary Response of Southern Ocean Diatoms to Environmental Change"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Specific growth rate measurements for 43 Southern Ocean diatoms", "uid": "601586", "west": -179.0}, {"awards": "1246407 Jenouvrier, Stephanie; 1840058 Jenouvrier, Stephanie", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Mon, 27 Jun 2022 00:00:00 GMT", "description": "Individuals differ in many ways. Most produce few offspring; a handful produce many. Some\r\ndie early; others live to old age. It is tempting to attribute these differences in outcomes to differences in individual traits, and thus in the demographic rates experienced. However, there is\r\nmore to individual variation than meets the eye of the biologist. Even among individuals sharing identical traits, life history outcomes (life expectancy and lifetime reproduction) will vary due\r\nto individual stochasticity, i.e., to chance. Quantifying the contributions of heterogeneity and\r\nchance is essential to understanding natural variability. Inter-individual differences vary across environmental conditions, hence heterogeneity and stochasticity depend on environmental conditions. We show that favorable conditions increase the contributions of individual stochasticity, and reduce the contributions of heterogeneity, to variance in demographic outcomes in a seabird population. The opposite is true under poor conditions. This result has important consequence for understanding the ecology and evolution of life history strategies.\r\n\r\nSpecifically, three life-history complexes exist in a population of southern fulmar (defined as sets of life-history characteristics that occur together through the lifetime of an individual). They are reminiscent of the gradient of life- history strategy observed among species:\r\n\r\n1. Group 1 (14% of offspring at fledging) is a slow-paced life history where individuals tend to delay recruitment, recruit successfully, and extend their reproductive lifespan.\r\n2. Group 2 (67% of offspring at fledging) consists of individuals that are less likely to recruit, have high adult survival, and skip breeding often.\r\n3. Group 3 (19% of offspring at fledging) is a fast-paced life history where individuals recruit early and attempt to breed often but have a short lifespan.\r\n\r\nIndividuals in groups 1 and 3 are considered \u201chigh-quality\u201d individuals because they produce, on average, more offspring over their lives than do individuals in group 2. But group 2 is made-up of individuals that experience the highest levels of adult survival.\r\n \r\nDifferences between these groups, i.e. individual heterogeneity, only explains a small fraction of variance in life expectancy (5.9%) and lifetime reproduction (22%) when environmental conditions are ordinary. We expect that the environmental context experienced, especially when environmental conditions get extreme, is key to characterizing individual heterogeneity and its contribution to life history outcomes. Here, we build on previous studies to quantify the impact of extreme environmental conditions on the relative contributions of individual heterogeneity and stochasticity to variance in life history outcomes.\r\nWe found that the differences in vital rates and demographic outcomes among complexes depend on the sea ice conditions individuals experience. Importantly, differences across life history complexes are amplified when sea ice concentration get extremely low. Sea ice conditions did not only affect patterns of life history traits, but also the variance of life history outcomes and the relative proportion of individual unobserved heterogeneity to the total variance. These new results advance the current debate on the relative importance heterogeneity (i.e. potentially adaptive) and stochasticity (i.e. enhances genetic drift) in shaping potentially neutral vs. adaptive changes in life histories.\r\n", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Biota; Birds; East Antarctica; Southern Fulmar", "locations": "Antarctica; East Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Jenouvrier, Stephanie", "project_titles": "Linking Foraging Behaviors to Demography to understand Albatrosses Population Responses to Climate Change; Polar Seabirds with Long-term Pair Bonds: Effects of Mating on Individual Fitness and Population Dynamics", "projects": [{"proj_uid": "p0010002", "repository": "USAP-DC", "title": "Linking Foraging Behaviors to Demography to understand Albatrosses Population Responses to Climate Change"}, {"proj_uid": "p0010090", "repository": "USAP-DC", "title": "Polar Seabirds with Long-term Pair Bonds: Effects of Mating on Individual Fitness and Population Dynamics"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Demographic outputs and their variances for three life history complexes for the Southern Fulmar across contrasted sea ice conditions.", "uid": "601585", "west": -180.0}, {"awards": "0003956 Burns, Jennifer; 0523338 Burns, Jennifer", "bounds_geometry": ["POLYGON((-70 -65,-69.5 -65,-69 -65,-68.5 -65,-68 -65,-67.5 -65,-67 -65,-66.5 -65,-66 -65,-65.5 -65,-65 -65,-65 -65.5,-65 -66,-65 -66.5,-65 -67,-65 -67.5,-65 -68,-65 -68.5,-65 -69,-65 -69.5,-65 -70,-65.5 -70,-66 -70,-66.5 -70,-67 -70,-67.5 -70,-68 -70,-68.5 -70,-69 -70,-69.5 -70,-70 -70,-70 -69.5,-70 -69,-70 -68.5,-70 -68,-70 -67.5,-70 -67,-70 -66.5,-70 -66,-70 -65.5,-70 -65))"], "date_created": "Fri, 24 Jun 2022 00:00:00 GMT", "description": "Total body oxygen stores were determined for adult crabeater seals in the Marguerite Bay region of the Western Antarctic Peninsula. This study was conducted in 2001 and 2002 as part of the Southern Ocean GLOBEC collaboration.", "east": -65.0, "geometry": ["POINT(-67.5 -67.5)"], "keywords": "Antarctica; Crabeater Seal; GLOBEC; Hemoglobin; LMG0104; LMG0106; LMG0204; LMG0205; Marguerite Bay; Myoglobin; Oxygen Stores; Seals", "locations": "Marguerite Bay; Antarctica", "north": -65.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Burns, Jennifer", "project_titles": "Foraging Ecology of Crabeater Seals (Lobodon Carcinophagus)", "projects": [{"proj_uid": "p0010345", "repository": "USAP-DC", "title": "Foraging Ecology of Crabeater Seals (Lobodon Carcinophagus)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -70.0, "title": "Crabeater seal oxygen stores", "uid": "601583", "west": -70.0}, {"awards": "1543367 Shubin, Neil", "bounds_geometry": ["POLYGON((158.3 -78.43,158.359 -78.43,158.418 -78.43,158.477 -78.43,158.536 -78.43,158.595 -78.43,158.654 -78.43,158.713 -78.43,158.772 -78.43,158.831 -78.43,158.89 -78.43,158.89 -78.44200000000001,158.89 -78.45400000000001,158.89 -78.46600000000001,158.89 -78.47800000000001,158.89 -78.49000000000001,158.89 -78.502,158.89 -78.514,158.89 -78.526,158.89 -78.538,158.89 -78.55,158.831 -78.55,158.772 -78.55,158.713 -78.55,158.654 -78.55,158.595 -78.55,158.536 -78.55,158.477 -78.55,158.418 -78.55,158.359 -78.55,158.3 -78.55,158.3 -78.538,158.3 -78.526,158.3 -78.514,158.3 -78.502,158.3 -78.49000000000001,158.3 -78.47800000000001,158.3 -78.46600000000001,158.3 -78.45400000000001,158.3 -78.44200000000001,158.3 -78.43))"], "date_created": "Fri, 24 Jun 2022 00:00:00 GMT", "description": "List of locations and identified fossils from the Aztec Siltstone (Mid-Late Devonian) in the Transantarctic Mountains (2018-2019 field season).", "east": 158.89, "geometry": ["POINT(158.595 -78.49000000000001)"], "keywords": "Acanthodii; Antarctica; Chondrichthyes; Early Vertebrates; Osteolepiformes; Paleontology; Placodermi; Transantarctic Mountains; Vertebrate Evolution", "locations": "Antarctica; Transantarctic Mountains", "north": -78.43, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Daeschler, Ted", "project_titles": "Middle-Late Devonian Vertebrates of Antarctica", "projects": [{"proj_uid": "p0010340", "repository": "USAP-DC", "title": "Middle-Late Devonian Vertebrates of Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.55, "title": "Vertebrate Fossils from the Aztec Siltstone (Mid-Late Devonian) 2 (2018-2019)", "uid": "601584", "west": 158.3}, {"awards": "1743643 Passchier, Sandra", "bounds_geometry": ["POINT(-42.933 -61.849)"], "date_created": "Wed, 22 Jun 2022 00:00:00 GMT", "description": "This dataset contains measurements of major and trace elements on 190 samples of Eocene-Oligocene sediment from Ocean Drilling Program Site 696 drilled in 650 m water depth on the South Orkney Microcontinent. The composition of detrital, biogenic and authigenic sediment components was assessed via whole rock geochemistry of sediment samples. Instrument analysis was completed at Montclair State University.", "east": -42.933, "geometry": ["POINT(-42.933 -61.849)"], "keywords": "Antarctica; Glaciation; IODP 650; IODP 696; Paleoceanography; Provenance; Sediment Core Data; Weathering; Weddell Sea", "locations": "Weddell Sea; Antarctica", "north": -61.849, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Passchier, Sandra; Hojnacki, Victoria; Li, Xiaona; States, Abbey; Lepp, Allison", "project_titles": "Timing and Spatial Distribution of Antarctic Ice Sheet Growth and Sea-ice Formation across the Eocene-Oligocene Transition", "projects": [{"proj_uid": "p0010101", "repository": "USAP-DC", "title": "Timing and Spatial Distribution of Antarctic Ice Sheet Growth and Sea-ice Formation across the Eocene-Oligocene Transition"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -61.849, "title": "Major and trace element analyses of Eocene-Oligocene marine sediments from ODP Site 696, South Orkney Microcontinent", "uid": "601582", "west": -42.933}, {"awards": "1743643 Passchier, Sandra", "bounds_geometry": ["POINT(-42.933 -61.849)"], "date_created": "Tue, 21 Jun 2022 00:00:00 GMT", "description": "This dataset contains measurements of terrigenous particle-size distributions on Eocene-Oligocene sediment from Ocean Drilling Program Site 696 drilled in 650 m water depth on the South Orkney Microcontinent. Carbonate and organic matter were removed through addition of 10mL aliquots of 30% H2O2, 2mL aliquots of 10% HCl to ~50-100mL suspension on a hot plate. Diatoms were generally either absent or present in trace amounts in the Eocene-Oligocene interval and were not removed. Dispersion was through heating with sodium pyrophosphate. Samples were measured on a Malvern Mastersizer 2000 with a Hydro 2000MU (A) accessory, using a Refractive Index of 1.6 (Illite) and an absorption coefficient of 0.9. Results are in (vol. %) per size class, with diameter range equivalent to the diameter of spheres with the same volume as measured particles.", "east": -42.933, "geometry": ["POINT(-42.933 -61.849)"], "keywords": "Antarctica; Glaciation; IODP 696; Marine Geoscience; Marine Sediments; Paleoceanography; Sediment Core Data; Weddell Sea", "locations": "Antarctica; Weddell Sea", "north": -61.849, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Passchier, Sandra; Lepp, Allison; Horowitz Castaldo, Josie; Light, Jennifer", "project_titles": "Timing and Spatial Distribution of Antarctic Ice Sheet Growth and Sea-ice Formation across the Eocene-Oligocene Transition", "projects": [{"proj_uid": "p0010101", "repository": "USAP-DC", "title": "Timing and Spatial Distribution of Antarctic Ice Sheet Growth and Sea-ice Formation across the Eocene-Oligocene Transition"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -61.849, "title": "Particle-size distributions of Eocene-Oligocene sediment from ODP Site 696, South Orkney Microcontinent", "uid": "601581", "west": -42.933}, {"awards": "1543367 Shubin, Neil", "bounds_geometry": ["POLYGON((160.24 -77.53,160.286 -77.53,160.332 -77.53,160.37800000000001 -77.53,160.424 -77.53,160.47 -77.53,160.516 -77.53,160.56199999999998 -77.53,160.608 -77.53,160.654 -77.53,160.7 -77.53,160.7 -77.557,160.7 -77.584,160.7 -77.611,160.7 -77.638,160.7 -77.66499999999999,160.7 -77.692,160.7 -77.719,160.7 -77.746,160.7 -77.773,160.7 -77.8,160.654 -77.8,160.608 -77.8,160.56199999999998 -77.8,160.516 -77.8,160.47 -77.8,160.424 -77.8,160.37800000000001 -77.8,160.332 -77.8,160.286 -77.8,160.24 -77.8,160.24 -77.773,160.24 -77.746,160.24 -77.719,160.24 -77.692,160.24 -77.66499999999999,160.24 -77.638,160.24 -77.611,160.24 -77.584,160.24 -77.557,160.24 -77.53))"], "date_created": "Fri, 17 Jun 2022 00:00:00 GMT", "description": "List of locations and identified fossils from the Aztec Siltstone (Mid-Late Devonian) in the Transantarcitc Mountains", "east": 160.7, "geometry": ["POINT(160.47 -77.66499999999999)"], "keywords": "Acanthodii; Antarctica; Chondrichthyes; Early Vertebrates; Osteolepiformes; Paleontology; Placodermi; Transantarctic Mountains; Vertebrate Evolution", "locations": "Antarctica; Transantarctic Mountains", "north": -77.53, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Daeschler, Ted", "project_titles": "Middle-Late Devonian Vertebrates of Antarctica", "projects": [{"proj_uid": "p0010340", "repository": "USAP-DC", "title": "Middle-Late Devonian Vertebrates of Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.8, "title": "Vertebrate Fossils from the Aztec Siltstone (Mid-Late Devonian)", "uid": "601580", "west": 160.24}, {"awards": "1643436 Donohoe, Aaron", "bounds_geometry": ["POLYGON((-180 90,-180 90,-180 90,-180 90,-180 90,-180 90,-180 90,-180 90,-180 90,-180 90,-180 90,-180 72,-180 54,-180 36,-180 18,-180 0,-180 -18,-180 -36,-180 -54,-180 -72,-180 -90,-180 -90,-180 -90,-180 -90,-180 -90,-180 -90,-180 -90,-180 -90,-180 -90,-180 -90,180 -90,180 -90,180 -90,180 -90,180 -90,180 -90,180 -90,180 -90,180 -90,180 -90,180 -90,180 -72,180 -54,180 -36,180 -18,180 0,180 18,180 36,180 54,180 72,180 90,180 90,180 90,180 90,180 90,180 90,180 90,180 90,180 90,180 90,-180 90))"], "date_created": "Fri, 10 Jun 2022 00:00:00 GMT", "description": "The partitioning of top of atmosphere radiation into surface and atmospheric contributions using the isotropic SW model over the CERES satellite record ", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Southern Ocean", "locations": "Antarctica; Southern Ocean", "north": 90.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Donohoe, Aaron", "project_titles": "What Processes Drive Southern Ocean Sea Ice Variability and Trends? Insights from the Energy Budget of the Coupled Cryosphere-ocean-atmosphere System", "projects": [{"proj_uid": "p0010336", "repository": "USAP-DC", "title": "What Processes Drive Southern Ocean Sea Ice Variability and Trends? Insights from the Energy Budget of the Coupled Cryosphere-ocean-atmosphere System"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Partionining of CERES planetary albedo between atmospheric and surface reflection", "uid": "601579", "west": -180.0}, {"awards": "1929991 Pettit, Erin C", "bounds_geometry": ["POLYGON((-117.45625697487581 -73.79754996487824,-116.50673841062198 -73.79754996487824,-115.55721984636816 -73.79754996487824,-114.60770128211433 -73.79754996487824,-113.6581827178605 -73.79754996487824,-112.70866415360666 -73.79754996487824,-111.75914558935284 -73.79754996487824,-110.80962702509902 -73.79754996487824,-109.86010846084518 -73.79754996487824,-108.91058989659135 -73.79754996487824,-107.96107133233753 -73.79754996487824,-107.96107133233753 -74.04840280405163,-107.96107133233753 -74.29925564322501,-107.96107133233753 -74.5501084823984,-107.96107133233753 -74.80096132157178,-107.96107133233753 -75.05181416074517,-107.96107133233753 -75.30266699991856,-107.96107133233753 -75.55351983909193,-107.96107133233753 -75.80437267826532,-107.96107133233753 -76.0552255174387,-107.96107133233753 -76.30607835661209,-108.91058989659135 -76.30607835661209,-109.86010846084518 -76.30607835661209,-110.80962702509902 -76.30607835661209,-111.75914558935284 -76.30607835661209,-112.70866415360666 -76.30607835661209,-113.6581827178605 -76.30607835661209,-114.60770128211433 -76.30607835661209,-115.55721984636816 -76.30607835661209,-116.50673841062198 -76.30607835661209,-117.45625697487581 -76.30607835661209,-117.45625697487581 -76.0552255174387,-117.45625697487581 -75.80437267826532,-117.45625697487581 -75.55351983909193,-117.45625697487581 -75.30266699991856,-117.45625697487581 -75.05181416074517,-117.45625697487581 -74.80096132157178,-117.45625697487581 -74.5501084823984,-117.45625697487581 -74.29925564322501,-117.45625697487581 -74.04840280405163,-117.45625697487581 -73.79754996487824))"], "date_created": "Thu, 09 Jun 2022 00:00:00 GMT", "description": "This data set includes maps of height above flotation, surface lowering rates, dynamic thickness change, basal melt rates and grounding-line projections from the Dotson-Crosson Ice Shelf System. Furthermore, we included point clouds of migrated ICESat data and ship-based measurents of ocean current and mean potential temperature along the Dotson Ice Shelf\u0027s front.", "east": -107.96107133233753, "geometry": ["POINT(-112.70866415360666 -75.05181416074517)"], "keywords": "Antarctica; Dotson Ice Shelf; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology", "locations": "Dotson Ice Shelf; Antarctica", "north": -73.79754996487824, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Wild, Christian; Segabinazzi-Dotto, Tiago", "project_titles": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment", "projects": [{"proj_uid": "p0010162", "repository": "USAP-DC", "title": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -76.30607835661209, "title": "Dotson-Crosson Ice Shelf data from a tale of two ice shelves paper", "uid": "601578", "west": -117.45625697487581}, {"awards": "1341432 Brzezinski, Mark; 1341464 Robinson, Rebecca", "bounds_geometry": ["POLYGON((-175 -54,-174 -54,-173 -54,-172 -54,-171 -54,-170 -54,-169 -54,-168 -54,-167 -54,-166 -54,-165 -54,-165 -55.3,-165 -56.6,-165 -57.9,-165 -59.2,-165 -60.5,-165 -61.8,-165 -63.1,-165 -64.4,-165 -65.7,-165 -67,-166 -67,-167 -67,-168 -67,-169 -67,-170 -67,-171 -67,-172 -67,-173 -67,-174 -67,-175 -67,-175 -65.7,-175 -64.4,-175 -63.1,-175 -61.8,-175 -60.5,-175 -59.2,-175 -57.9,-175 -56.6,-175 -55.3,-175 -54))"], "date_created": "Thu, 02 Jun 2022 00:00:00 GMT", "description": "This dataset contains data for particulate silicon, particulate carbon, particulate nitrogen, stable isotopes of nitrogen and stable isotopes of silicon in particulates from McLane pump profiles", "east": -165.0, "geometry": ["POINT(-170 -60.5)"], "keywords": "Antarctica; Biogenic Silica; Chemistry:sediment; Chemistry:Sediment; Diatom; Diatom Bound; Lithogenic Silica; Marine Geoscience; NBP1702; Nitrogen Isotopes; Silicon Cycle; Silicon Stable Isotope; Southern Ocean", "locations": "Antarctica; Southern Ocean; Southern Ocean", "north": -54.0, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Earth Sciences", "persons": "Jones, Janice L.; Closset, Ivia; Robinson, Rebecca; Brzezinski, Mark", "project_titles": "Collaborative Proposal: A Field and Laboratory Examination of the Diatom N and Si Isotope Proxies: Implications for Assessing the Southern Ocean Biological Pump", "projects": [{"proj_uid": "p0010083", "repository": "USAP-DC", "title": "Collaborative Proposal: A Field and Laboratory Examination of the Diatom N and Si Isotope Proxies: Implications for Assessing the Southern Ocean Biological Pump"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -67.0, "title": " Particulate silicon and nitrogen concentrations and isotopic composition measurements in McLane pump profiles from 67\u00b0S to 55\u00b0S latitude in the Pacific Sector of the Southern Ocean", "uid": "601576", "west": -175.0}, {"awards": "1341432 Brzezinski, Mark", "bounds_geometry": ["POLYGON((-175 -54,-174 -54,-173 -54,-172 -54,-171 -54,-170 -54,-169 -54,-168 -54,-167 -54,-166 -54,-165 -54,-165 -55.3,-165 -56.6,-165 -57.9,-165 -59.2,-165 -60.5,-165 -61.8,-165 -63.1,-165 -64.4,-165 -65.7,-165 -67,-166 -67,-167 -67,-168 -67,-169 -67,-170 -67,-171 -67,-172 -67,-173 -67,-174 -67,-175 -67,-175 -65.7,-175 -64.4,-175 -63.1,-175 -61.8,-175 -60.5,-175 -59.2,-175 -57.9,-175 -56.6,-175 -55.3,-175 -54))"], "date_created": "Mon, 16 May 2022 00:00:00 GMT", "description": "This dataset contains data for stable isotopes of silicon in pore water, interstitial water, sediments and CTD profiles.", "east": -165.0, "geometry": ["POINT(-170 -60.5)"], "keywords": "Antarctica; Biogenic Silica; Chemistry:sediment; Chemistry:Sediment; Lithogenic Silica; Marine Geoscience; NBP1702; Pore Water Biogeochemistry; Sediment; Silicon Cycle; Silicon Stable Isotope; Southern Ocean", "locations": "Southern Ocean; Antarctica", "north": -54.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Closset, Ivia; Jones, Janice L.; Brzezinski, Mark", "project_titles": "Collaborative Proposal: A Field and Laboratory Examination of the Diatom N and Si Isotope Proxies: Implications for Assessing the Southern Ocean Biological Pump", "projects": [{"proj_uid": "p0010083", "repository": "USAP-DC", "title": "Collaborative Proposal: A Field and Laboratory Examination of the Diatom N and Si Isotope Proxies: Implications for Assessing the Southern Ocean Biological Pump"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -67.0, "title": "Silicon concentration and isotopic composition measurements in seawater profiles, pore waters, interstitial waters and sediments from 67\u00b0S to 55\u00b0S latitude in the Pacific Sector of the Southern Ocean", "uid": "601562", "west": -175.0}, {"awards": "1744759 Dunham, Eric", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Mon, 16 May 2022 00:00:00 GMT", "description": "", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Amundsen Sea; Antarctica; Glaciology", "locations": "Antarctica; Amundsen Sea", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Tazhimbetov, Nurbek; Dunham, Eric; Almquist, Martin", "project_titles": "Collaborative Research: Do Ocean Wave Impacts Pose a Hazard to the Stability of West Antarctic Ice Shelves?", "projects": [{"proj_uid": "p0010320", "repository": "USAP-DC", "title": "Collaborative Research: Do Ocean Wave Impacts Pose a Hazard to the Stability of West Antarctic Ice Shelves?"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Simulation of flexural-gravity wave response of Antarctic ice shelves to tsunami and infragravity waves", "uid": "601561", "west": -180.0}, {"awards": "1246463 Burns, Jennifer", "bounds_geometry": ["POINT(165 -77)"], "date_created": "Mon, 09 May 2022 00:00:00 GMT", "description": "This dataset includes dive records from Weddell seals located in McMurdo Sound, Antarctica from the austral summers of 1978, 1979, and 1981 using Kooyman-Billups Time Depth Recorders. The data were recovered from photocopied paper scrolls using a code package (https://doi.org/10.5281/zenodo.14025657). This recovery process involved record scanning, image processing, and bias correction such that the historic data are directly comparable with dive data from modern instruments. This dataset contains the scanned images of the paper dive records (KBTDR_record_scans) and comma-separated value files of the dive data after recovery (KBTDR_data). Only records from McMurdo Sound were recovered, but record scans from Terra Nova Bay and White Island are also provided for future long-term studies on diving behavior. ", "east": 165.0, "geometry": ["POINT(165 -77)"], "keywords": "Antarctica; Biota; Diving Behavior; McMurdo Sound; Weddell Seal", "locations": "McMurdo Sound; Antarctica", "north": -77.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Tsai, EmmaLi", "project_titles": "The Cost of A New Fur Coat: Interactions between Molt and Reproduction in Weddell Seals", "projects": [{"proj_uid": "p0000229", "repository": "USAP-DC", "title": "The Cost of A New Fur Coat: Interactions between Molt and Reproduction in Weddell Seals"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.0, "title": "1970s - 1980s Kooyman-Billups TDR Dive Records from Weddell Seals in McMurdo Sound", "uid": "601560", "west": 165.0}, {"awards": "0944150 Hall, Brenda", "bounds_geometry": ["POLYGON((163.7 -77.9,163.79 -77.9,163.88 -77.9,163.97 -77.9,164.06 -77.9,164.15 -77.9,164.24 -77.9,164.33 -77.9,164.42 -77.9,164.51 -77.9,164.6 -77.9,164.6 -77.91,164.6 -77.92,164.6 -77.93,164.6 -77.94,164.6 -77.95,164.6 -77.96,164.6 -77.97,164.6 -77.98,164.6 -77.99,164.6 -78,164.51 -78,164.42 -78,164.33 -78,164.24 -78,164.15 -78,164.06 -78,163.97 -78,163.88 -78,163.79 -78,163.7 -78,163.7 -77.99,163.7 -77.98,163.7 -77.97,163.7 -77.96,163.7 -77.95,163.7 -77.94,163.7 -77.93,163.7 -77.92,163.7 -77.91,163.7 -77.9))"], "date_created": "Wed, 20 Apr 2022 00:00:00 GMT", "description": "This dataset includes radiocarbon dates of benthic algal mats associated with last glacial maximum Ross Sea drift in Salmon Valley, Royal Society Range.", "east": 164.6, "geometry": ["POINT(164.15 -77.95)"], "keywords": "Antarctica; Last Glacial Maximum; McMurdo Sound; Radiocarbon Dates; Ross Sea Drift; Royal Society Range", "locations": "Ross Sea Drift; Royal Society Range; McMurdo Sound; Antarctica", "north": -77.9, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Hall, Brenda", "project_titles": "Sensitivity of the Antarctic Ice Sheet to Climate Change over the Last Two Glacial/Interglacial Cycles", "projects": [{"proj_uid": "p0010302", "repository": "USAP-DC", "title": "Sensitivity of the Antarctic Ice Sheet to Climate Change over the Last Two Glacial/Interglacial Cycles"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Salmon Valley Radiocarbon Data", "uid": "601556", "west": 163.7}, {"awards": "0944150 Hall, Brenda", "bounds_geometry": ["POLYGON((163.5 -77.3,163.65 -77.3,163.8 -77.3,163.95 -77.3,164.1 -77.3,164.25 -77.3,164.4 -77.3,164.55 -77.3,164.7 -77.3,164.85 -77.3,165 -77.3,165 -77.39,165 -77.48,165 -77.57,165 -77.66,165 -77.75,165 -77.84,165 -77.93,165 -78.02,165 -78.11,165 -78.2,164.85 -78.2,164.7 -78.2,164.55 -78.2,164.4 -78.2,164.25 -78.2,164.1 -78.2,163.95 -78.2,163.8 -78.2,163.65 -78.2,163.5 -78.2,163.5 -78.11,163.5 -78.02,163.5 -77.93,163.5 -77.84,163.5 -77.75,163.5 -77.66,163.5 -77.57,163.5 -77.48,163.5 -77.39,163.5 -77.3))"], "date_created": "Wed, 20 Apr 2022 00:00:00 GMT", "description": "This dataset contains radiocarbon dates of benthic algal (cyanobacterial) mats within moraines associated with Ross Sea drift on the headlands of the Royal Society Range and covers the time period ~12-20 ka.", "east": 165.0, "geometry": ["POINT(164.25 -77.75)"], "keywords": "Antarctica; Last Glacial Maximum; McMurdo Sound; Radiocarbon Dates; Ross Sea Drift; Royal Society Range", "locations": "Royal Society Range; McMurdo Sound; Ross Sea Drift; Antarctica; Royal Society Range", "north": -77.3, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Hall, Brenda", "project_titles": "Sensitivity of the Antarctic Ice Sheet to Climate Change over the Last Two Glacial/Interglacial Cycles", "projects": [{"proj_uid": "p0010302", "repository": "USAP-DC", "title": "Sensitivity of the Antarctic Ice Sheet to Climate Change over the Last Two Glacial/Interglacial Cycles"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.2, "title": "Royal Society Range Headland Moraine Belt Radiocarbon Data", "uid": "601555", "west": 163.5}, {"awards": "1738989 Venturelli, Ryan", "bounds_geometry": ["POLYGON((-105 -73,-104.5 -73,-104 -73,-103.5 -73,-103 -73,-102.5 -73,-102 -73,-101.5 -73,-101 -73,-100.5 -73,-100 -73,-100 -73.1,-100 -73.2,-100 -73.3,-100 -73.4,-100 -73.5,-100 -73.6,-100 -73.7,-100 -73.8,-100 -73.9,-100 -74,-100.5 -74,-101 -74,-101.5 -74,-102 -74,-102.5 -74,-103 -74,-103.5 -74,-104 -74,-104.5 -74,-105 -74,-105 -73.9,-105 -73.8,-105 -73.7,-105 -73.6,-105 -73.5,-105 -73.4,-105 -73.3,-105 -73.2,-105 -73.1,-105 -73))"], "date_created": "Mon, 11 Apr 2022 00:00:00 GMT", "description": "This dataset includes radiocarbon dates and elevations of organic samples in raised beaches in the Edwards, Lindsey, and Schaefer Islands. It also includes a limited number of cosmogenic exposure-age data of bedrock from these islands.", "east": -100.0, "geometry": ["POINT(-102.5 -73.5)"], "keywords": "Antarctica; Pine Island Bay; Radiocarbon; Raised Beaches", "locations": "Antarctica; Pine Island Bay; Pine Island Bay", "north": -73.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Braddock, Scott; Hall, Brenda", "project_titles": "NSF-NERC: Geological History Constraints on the Magnitude of Grounding Line Retreat in the Thwaites Glacier System", "projects": [{"proj_uid": "p0010165", "repository": "USAP-DC", "title": "NSF-NERC: Geological History Constraints on the Magnitude of Grounding Line Retreat in the Thwaites Glacier System"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -74.0, "title": "Pine Island Bay Relative Sea-Level Data", "uid": "601554", "west": -105.0}, {"awards": "1443397 Kreutz, Karl", "bounds_geometry": ["POINT(0 -90)"], "date_created": "Fri, 01 Apr 2022 00:00:00 GMT", "description": "This dataset contains particle metrics for the South Pole Ice Core (SPICEcore) intermediate core (SPC14), from the surface to 1751 m depth (~54,000 years before present [BP]). Data were collected via Klotz Abakus laser particle counter via continuous-flow-analysis (CFA), Beckman Coulter Multisizer 3 using Coulter Counter (CC) principles, and dynamic particle imaging using a FlowCAM instrument. CFA measurements were made at Dartmouth College, CC measurements were made at Colby College, and FlowCAM measurements were made at the University of Maine.", "east": 0.0, "geometry": ["POINT(0 -90)"], "keywords": "Antarctica; Dust; Ice Core; South Pole", "locations": "Antarctica; South Pole", "north": -90.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Kreutz, Karl", "project_titles": "Collaborative Research: South Pole Ice Core Chronology and Climate Records using Chemical and Microparticle Measurements", "projects": [{"proj_uid": "p0010051", "repository": "USAP-DC", "title": "Collaborative Research: South Pole Ice Core Chronology and Climate Records using Chemical and Microparticle Measurements"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -90.0, "title": "South Pole (SPC14) microparticle concentration, mass concentration, flux, particle-size-distribution mode, and aspect ratio measurements", "uid": "601553", "west": 0.0}, {"awards": "1844793 Aksoy, Mustafa", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Tue, 29 Mar 2022 00:00:00 GMT", "description": "This dataset includes density, temperature, grain size, and layer thickness measurements collected from various projects available on USAP-DC. Depth listings were recalculated to reflect measurements from the surface of the ice to the deep ice if they were not listed as such in the original dataset. Non-linear least-squares regression was performed on the data to find parameters to existing depth-dependent density and grain size models and the regression results are provided in this dataset. Data is made available in MATLAB and XLSX files. See \u201cinsituData_readMe\u201d for more details.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Antarctic Ice Sheet", "locations": "Antarctica; Antarctic Ice Sheet", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Aksoy, Mustafa; Kaurejo, Dua; Kar, Rahul", "project_titles": "Characterization of Antarctic Firn by Multi-Frequency Passive Remote Sensing from Space", "projects": [{"proj_uid": "p0010206", "repository": "USAP-DC", "title": "Characterization of Antarctic Firn by Multi-Frequency Passive Remote Sensing from Space"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "In-Situ Density, Temperature, Grain Size, and Layer Thickness data for the Antarctic Ice Sheet", "uid": "601551", "west": -180.0}, {"awards": "1738992 Pettit, Erin C", "bounds_geometry": ["POLYGON((-105.55 -75.03,-105.53 -75.03,-105.51 -75.03,-105.49 -75.03,-105.47 -75.03,-105.45 -75.03,-105.43 -75.03,-105.41 -75.03,-105.39 -75.03,-105.37 -75.03,-105.35 -75.03,-105.35 -75.033,-105.35 -75.036,-105.35 -75.039,-105.35 -75.042,-105.35 -75.045,-105.35 -75.048,-105.35 -75.051,-105.35 -75.054,-105.35 -75.057,-105.35 -75.06,-105.37 -75.06,-105.39 -75.06,-105.41 -75.06,-105.43 -75.06,-105.45 -75.06,-105.47 -75.06,-105.49 -75.06,-105.51 -75.06,-105.53 -75.06,-105.55 -75.06,-105.55 -75.057,-105.55 -75.054,-105.55 -75.051,-105.55 -75.048,-105.55 -75.045,-105.55 -75.042,-105.55 -75.039,-105.55 -75.036,-105.55 -75.033,-105.55 -75.03))"], "date_created": "Tue, 29 Mar 2022 00:00:00 GMT", "description": "Campbell Scientific data loggers with eight platinum resistance thermometers (PRTs) and an acoustic snow height detector were installed as part of the AMIGOS-III instrumentation (AMIGOS: Automated Meteorology Ice Geophysics Observing System) The data are hourly reports of snow and near-surface air temperatures at different depths. At Cavity AMIGOS site, snow temperatures at ~1.2 meters depth (four PRTs) were used to provide reference temperatures for a coil of Distributed Thermal Sensing (DTS) fiber optic cable. At both sites, PRTs were attached to the tower (wrapped in reflective metal foil tape) as a means of investigating inversion strength and snow burial. At both sites, hourly snow height data using an acoustic sensor placed (initially) at 6.75 meters above the snow on a sensor cross-arm were acquired. A correction based on separately-measured air temperature was applied as per Campbell Scientifics correction algorithm. Both snow height sensors failed after just over one year (Cavity) or 10 months (Channel). Thermistor data continued to be acquired for 13 months (Cavity) or 19 months (Channel) \r\n\r\nThe two sites latest positions (01 Oct, 2021) are:\r\nCavity AMIGOS: 75.037\u00b0S, 105.58\u00b0W\r\nChannel AMIGOS: 75.049\u00b0S, 105.44\u00b0W\r\nboth stations are moving NNE at roughly 850 m.yr, having accelerated from about 650 m/yr in early 2020.", "east": -105.35, "geometry": ["POINT(-105.45 -75.045)"], "keywords": "Amundsen Sea; Antarctica; Ice Shelf; Pine Island Bay; Snow Accumulation; Snow Temperature; Thwaites Glacier", "locations": "Amundsen Sea; Thwaites Glacier; Antarctica; Thwaites Glacier; Pine Island Bay", "north": -75.03, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Scambos, Ted", "project_titles": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment", "projects": [{"proj_uid": "p0010162", "repository": "USAP-DC", "title": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -75.06, "title": "AMIGOS-III Cavity and Channel Snow Height and Thermistor Snow Temperature Data", "uid": "601552", "west": -105.55}, {"awards": "1844793 Aksoy, Mustafa", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Tue, 29 Mar 2022 00:00:00 GMT", "description": "This MATLAB dataset includes brightness temperatures measured by AMSR2 and SSMIS from 01/01/2020 to 06/30/2021 over the Concordia and Vostok Stations as well as the entire Antarctic Ice Sheet. Vertically and horizontally polarized GPM SSMIS/AMSR2 common intercalibrated brightness temperatures at 10.65 GHz, 18.7 GHz, 19.35 GHz, 23.8 GHz, 36.5 GHz, 37 GHz, 89 GHz, and 91.655 GHz averaged over 0.25-degree x 0.25-degree grid cells are stored. In addition, AMSR2 measurements at 6.9 GHz and 7.3 GHz in both polarizations are included. Please read the text file \u201csatData_readMe.txt\u201d for more details. ", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Antarctic Ice Sheet; Satellite; Vostok", "locations": "Vostok; Antarctica; Antarctic Ice Sheet", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Aksoy, Mustafa; Kaurejo, Dua; Kar, Rahul", "project_titles": "Characterization of Antarctic Firn by Multi-Frequency Passive Remote Sensing from Space", "projects": [{"proj_uid": "p0010206", "repository": "USAP-DC", "title": "Characterization of Antarctic Firn by Multi-Frequency Passive Remote Sensing from Space"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Antarctic Firn Brightness Temperatures Measured by AMSR2 and SSMIS (Concordia, Vostok, and the Entire Ice Sheet)", "uid": "601550", "west": -180.0}, {"awards": "1738992 Pettit, Erin C", "bounds_geometry": ["POLYGON((-105.65 -75.04,-105.64 -75.04,-105.63 -75.04,-105.62 -75.04,-105.61 -75.04,-105.6 -75.04,-105.59 -75.04,-105.58 -75.04,-105.57 -75.04,-105.56 -75.04,-105.55 -75.04,-105.55 -75.042,-105.55 -75.044,-105.55 -75.046,-105.55 -75.048,-105.55 -75.05,-105.55 -75.052,-105.55 -75.054,-105.55 -75.056,-105.55 -75.058,-105.55 -75.06,-105.56 -75.06,-105.57 -75.06,-105.58 -75.06,-105.59 -75.06,-105.6 -75.06,-105.61 -75.06,-105.62 -75.06,-105.63 -75.06,-105.64 -75.06,-105.65 -75.06,-105.65 -75.058,-105.65 -75.056,-105.65 -75.054,-105.65 -75.052,-105.65 -75.05,-105.65 -75.048,-105.65 -75.046,-105.65 -75.044,-105.65 -75.042,-105.65 -75.04))"], "date_created": "Mon, 28 Mar 2022 00:00:00 GMT", "description": "Aquadopp 6000m data spanning 14 months (with data gaps) at the Cavity site AMIGOS (Automated Meteorology-Ice-Geophysics Observing System) on the Thwaites Eastern Ice Shelf, Antarctica. Data are reported as the uncalibrated numbers from the sensors delivered through the inductive modem to the AMIGOS system and uplinked via Iridium. The units were installed two meters below each of the Seabird CTD sensors on the mooring line below the AMIGOS-3a Cavity ice shelf mooring. ", "east": -105.55, "geometry": ["POINT(-105.6 -75.05)"], "keywords": "Amundsen Sea; Antarctica; Ice Shelf; Mooring; Pine Island Bay; Pressure; Temperature; Thwaites Glacier", "locations": "Pine Island Bay; Amundsen Sea; Thwaites Glacier; Antarctica", "north": -75.04, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Scambos, Ted", "project_titles": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment", "projects": [{"proj_uid": "p0010162", "repository": "USAP-DC", "title": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -75.06, "title": "AMIGOS-IIIa \"Cavity\" Aquadopp current data Jan 2020 - Mar 2021", "uid": "601547", "west": -105.65}, {"awards": "1738992 Pettit, Erin C", "bounds_geometry": ["POLYGON((-105.55 -75.03,-105.53 -75.03,-105.51 -75.03,-105.49 -75.03,-105.47 -75.03,-105.45 -75.03,-105.43 -75.03,-105.41 -75.03,-105.39 -75.03,-105.37 -75.03,-105.35 -75.03,-105.35 -75.033,-105.35 -75.036,-105.35 -75.039,-105.35 -75.042,-105.35 -75.045,-105.35 -75.048,-105.35 -75.051,-105.35 -75.054,-105.35 -75.057,-105.35 -75.06,-105.37 -75.06,-105.39 -75.06,-105.41 -75.06,-105.43 -75.06,-105.45 -75.06,-105.47 -75.06,-105.49 -75.06,-105.51 -75.06,-105.53 -75.06,-105.55 -75.06,-105.55 -75.057,-105.55 -75.054,-105.55 -75.051,-105.55 -75.048,-105.55 -75.045,-105.55 -75.042,-105.55 -75.039,-105.55 -75.036,-105.55 -75.033,-105.55 -75.03))"], "date_created": "Mon, 28 Mar 2022 00:00:00 GMT", "description": "Visalia WXT520 weather station hourly data spanning 20 months (with data gaps) at the Cavity and Channel AMIGOS-III sites (Automated Meteorology-Ice-Geophysics Observing System) on the Thwaites Eastern Ice Shelf, Antarctica. Data are reported as the values from the sensors delivered through the Iridium modem via SBD from the AMIGOS. The units were installed at ~6.5m above the surface initially, with snow accumulation gradually reducing that to an estimated 3.5 m after 20 months. The stations report wind direction and speed, air temperature, humidity, pressure, and station power.\r\n\r\nThe two sites latest positions (01 Oct, 2021) are:\r\nCavity AMIGOS: 75.037\u00b0S, 105.58\u00b0W\r\nChannel AMIGOS: 75.049\u00b0S, 105.44\u00b0W\r\nboth stations are moving NNE at roughly 850 m.yr, having accelerated from about 650 m/yr in early 2020.", "east": -105.35, "geometry": ["POINT(-105.45 -75.045)"], "keywords": "Amundsen Sea; Antarctica; Ice Shelf; Pine Island Bay; Thwaites Glacier", "locations": "Amundsen Sea; Thwaites Glacier; Pine Island Bay; Thwaites Glacier; Antarctica", "north": -75.03, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Scambos, Ted", "project_titles": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment", "projects": [{"proj_uid": "p0010162", "repository": "USAP-DC", "title": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -75.06, "title": "Visala WXT520 weather station data at the Cavity and Channel AMIGOS-III sites", "uid": "601549", "west": -105.55}, {"awards": "1738992 Pettit, Erin C", "bounds_geometry": ["POLYGON((-105.45 -75.04,-105.44 -75.04,-105.43 -75.04,-105.42 -75.04,-105.41 -75.04,-105.4 -75.04,-105.39 -75.04,-105.38 -75.04,-105.37 -75.04,-105.36 -75.04,-105.35 -75.04,-105.35 -75.042,-105.35 -75.044,-105.35 -75.046,-105.35 -75.048,-105.35 -75.05,-105.35 -75.052,-105.35 -75.054,-105.35 -75.056,-105.35 -75.058,-105.35 -75.06,-105.36 -75.06,-105.37 -75.06,-105.38 -75.06,-105.39 -75.06,-105.4 -75.06,-105.41 -75.06,-105.42 -75.06,-105.43 -75.06,-105.44 -75.06,-105.45 -75.06,-105.45 -75.058,-105.45 -75.056,-105.45 -75.054,-105.45 -75.052,-105.45 -75.05,-105.45 -75.048,-105.45 -75.046,-105.45 -75.044,-105.45 -75.042,-105.45 -75.04))"], "date_created": "Mon, 28 Mar 2022 00:00:00 GMT", "description": "Aquadopp 6000m data spanning 14 months (with data gaps) at the Channel site AMIGOS (Automated Meteorology-Ice-Geophysics Observing System) on the Thwaites Eastern Ice Shelf, Antarctica. Data are reported as the uncalibrated numbers from the sensors delivered through the inductive modem to the AMIGOS system and uplinked via Iridium. The units were installed two meters below each of the Seabird CTD sensors on the mooring line below the AMIGOS-3a Channel ice shelf mooring. ", "east": -105.35, "geometry": ["POINT(-105.4 -75.05)"], "keywords": "Amundsen Sea; Antarctica; Ice Shelf; Mooring; Pine Island Bay; Pressure; Temperature; Thwaites Glacier", "locations": "Antarctica; Thwaites Glacier; Amundsen Sea; Pine Island Bay", "north": -75.04, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Scambos, Ted", "project_titles": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment", "projects": [{"proj_uid": "p0010162", "repository": "USAP-DC", "title": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -75.06, "title": "AMIGOS-IIIc \"Channel\" Aquadopp current data Jan 2020 - Mar 2021", "uid": "601548", "west": -105.45}, {"awards": "1643722 Brook, Edward J.", "bounds_geometry": ["POLYGON((-180 -89,-171.9 -89,-163.8 -89,-155.7 -89,-147.6 -89,-139.5 -89,-131.4 -89,-123.3 -89,-115.2 -89,-107.1 -89,-99 -89,-99 -89,-99 -89,-99 -89,-99 -89,-99 -89,-99 -89,-99 -89,-99 -89,-99 -89,-99 -89,-107.1 -89,-115.2 -89,-123.3 -89,-131.4 -89,-139.5 -89,-147.6 -89,-155.7 -89,-163.8 -89,-171.9 -89,180 -89,152.2 -89,124.4 -89,96.6 -89,68.8 -89,41 -89,13.2 -89,-14.6 -89,-42.4 -89,-70.2 -89,-98 -89,-98 -89,-98 -89,-98 -89,-98 -89,-98 -89,-98 -89,-98 -89,-98 -89,-98 -89,-98 -89,-70.2 -89,-42.4 -89,-14.6 -89,13.2 -89,41 -89,68.8 -89,96.6 -89,124.4 -89,152.2 -89,-180 -89))"], "date_created": "Mon, 28 Mar 2022 00:00:00 GMT", "description": "Total air content (TAC) of the South Pole ice core (SPC14). The dataset includes 1,225 duplicate or triplicate averaged measurements along the 1,751-m length of the ice core. Measurements were made using a wet extraction technique, concurrent with discrete CH4 concentration measurements.", "east": -99.0, "geometry": ["POINT(81.5 -89)"], "keywords": "Antarctica; South Pole", "locations": "Antarctica; South Pole", "north": -89.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Epifanio, Jenna", "project_titles": "A High Resolution Atmospheric Methane Record from the South Pole Ice Core", "projects": [{"proj_uid": "p0010102", "repository": "USAP-DC", "title": "A High Resolution Atmospheric Methane Record from the South Pole Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -89.0, "title": "South Pole ice core (SPC14) total air content (TAC)", "uid": "601546", "west": -98.0}, {"awards": "1738992 Pettit, Erin C", "bounds_geometry": ["POLYGON((-105.43 -75.045,-105.425 -75.045,-105.42 -75.045,-105.415 -75.045,-105.41 -75.045,-105.405 -75.045,-105.4 -75.045,-105.395 -75.045,-105.39 -75.045,-105.385 -75.045,-105.38 -75.045,-105.38 -75.047,-105.38 -75.049,-105.38 -75.051,-105.38 -75.053,-105.38 -75.055,-105.38 -75.057,-105.38 -75.059,-105.38 -75.061,-105.38 -75.063,-105.38 -75.065,-105.385 -75.065,-105.39 -75.065,-105.395 -75.065,-105.4 -75.065,-105.405 -75.065,-105.41 -75.065,-105.415 -75.065,-105.42 -75.065,-105.425 -75.065,-105.43 -75.065,-105.43 -75.063,-105.43 -75.061,-105.43 -75.059,-105.43 -75.057,-105.43 -75.055,-105.43 -75.053,-105.43 -75.051,-105.43 -75.049,-105.43 -75.047,-105.43 -75.045))"], "date_created": "Sat, 26 Mar 2022 00:00:00 GMT", "description": "Seabird MicroCAT SBE37IMP data spanning two years (with data gaps) at the Channel site AMIGOS (Automated Meteorology-Ice-Geophysics Observing System) on the Thwaites Eastern Ice Shelf, Antarctica. Data are reported as the uncalibrated numbers from the sensors delivered through the inductive modem to the AMIGOS system and uplinked via Iridium. Calibration information and test runs against a retrieved CTD unit are provided.", "east": -105.38, "geometry": ["POINT(-105.405 -75.055)"], "keywords": "Amundsen Sea; Antarctica; Ice Shelf; Mooring; Pine Island Bay; Pressure; Salinity; Temperature; Thwaites Glacier", "locations": "Antarctica; Amundsen Sea; Pine Island Bay; Thwaites Glacier", "north": -75.045, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Scambos, Ted", "project_titles": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment", "projects": [{"proj_uid": "p0010162", "repository": "USAP-DC", "title": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -75.065, "title": "AMIGOS-IIIc \"Channel\" Seabird CTD data Jan 2020 - Dec 2021", "uid": "601545", "west": -105.43}, {"awards": "1738992 Pettit, Erin C", "bounds_geometry": ["POLYGON((-105.6 -75.045,-105.595 -75.045,-105.59 -75.045,-105.585 -75.045,-105.58 -75.045,-105.575 -75.045,-105.57 -75.045,-105.565 -75.045,-105.56 -75.045,-105.555 -75.045,-105.55 -75.045,-105.55 -75.047,-105.55 -75.049,-105.55 -75.051,-105.55 -75.053,-105.55 -75.055,-105.55 -75.057,-105.55 -75.059,-105.55 -75.061,-105.55 -75.063,-105.55 -75.065,-105.555 -75.065,-105.56 -75.065,-105.565 -75.065,-105.57 -75.065,-105.575 -75.065,-105.58 -75.065,-105.585 -75.065,-105.59 -75.065,-105.595 -75.065,-105.6 -75.065,-105.6 -75.063,-105.6 -75.061,-105.6 -75.059,-105.6 -75.057,-105.6 -75.055,-105.6 -75.053,-105.6 -75.051,-105.6 -75.049,-105.6 -75.047,-105.6 -75.045))"], "date_created": "Sat, 26 Mar 2022 00:00:00 GMT", "description": "Seabird MicroCAT SBE37IMP data spanning two years (with data gaps) at the Cavity site AMIGOS (Automated Meteorology-Ice-Geophysics Observing System) on the Thwaites Eastern Ice Shelf, Antarctica. Data are reported as the uncalibrated numbers from the sensors delivered through the inductive modem to the AMIGOS system and uplinked via Iridium. Calibration information and test runs against a retrieved CTD unit are provided.", "east": -105.55, "geometry": ["POINT(-105.575 -75.055)"], "keywords": "Amundsen Sea; Antarctica; Ice Shelf; Mooring; Pine Island Bay; Pressure; Salinity; Temperature; Thwaites Glacier", "locations": "Antarctica; Pine Island Bay; Thwaites Glacier; Amundsen Sea", "north": -75.045, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Scambos, Ted", "project_titles": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment", "projects": [{"proj_uid": "p0010162", "repository": "USAP-DC", "title": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -75.065, "title": "AMIGOS-IIIa \"Cavity\" Seabird CTD data Jan 2020 - Dec 2021", "uid": "601544", "west": -105.6}, {"awards": "1643877 Friedlaender, Ari", "bounds_geometry": ["POLYGON((-65 -62,-64.5 -62,-64 -62,-63.5 -62,-63 -62,-62.5 -62,-62 -62,-61.5 -62,-61 -62,-60.5 -62,-60 -62,-60 -62.4,-60 -62.8,-60 -63.2,-60 -63.6,-60 -64,-60 -64.4,-60 -64.8,-60 -65.2,-60 -65.6,-60 -66,-60.5 -66,-61 -66,-61.5 -66,-62 -66,-62.5 -66,-63 -66,-63.5 -66,-64 -66,-64.5 -66,-65 -66,-65 -65.6,-65 -65.2,-65 -64.8,-65 -64.4,-65 -64,-65 -63.6,-65 -63.2,-65 -62.8,-65 -62.4,-65 -62))"], "date_created": "Wed, 23 Mar 2022 00:00:00 GMT", "description": "This dataset contains motion-sensing and video recording data from CATS biologging tags deployed on Antarctic minke whales in 2018 and 2019. The data are used to determine underwater behavior and link foraging rates to environmental covariates to better understand the ecological role of this poorly known krill predator. Specifically, we are interested in how the presence and amount of ice affects the behavior of this species in the nearshore waters on the western side of the Antarctic Peninsula, a region experiencing rapid climate change.", "east": -60.0, "geometry": ["POINT(-62.5 -64)"], "keywords": "Antarctica; Antarctic Peninsula; Biologging; Foraging; Ice; Minke Whales", "locations": "Antarctica; Antarctic Peninsula", "north": -62.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Friedlaender, Ari", "project_titles": "Foraging Behavior and Ecological Role of the Least Studied Antarctic Krill Predator, the Antarctic Minke Whale (Balaenoptera Bonaerensis)", "projects": [{"proj_uid": "p0010207", "repository": "USAP-DC", "title": "Foraging Behavior and Ecological Role of the Least Studied Antarctic Krill Predator, the Antarctic Minke Whale (Balaenoptera Bonaerensis)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -66.0, "title": "Motion-sensing biologging data from Antarctic minke whales, West Antarctic Peninsula", "uid": "601542", "west": -65.0}, {"awards": "1744954 Lubin, Dan", "bounds_geometry": ["POINT(-148.81 -81.65)"], "date_created": "Fri, 18 Mar 2022 00:00:00 GMT", "description": "This data set comprises radiative and turbulent flux components of the surface energy balance at Siple Dome, West Antarctica, measured between 21 December 2019 and 19 January 2020. Radiative fluxes were measured by Kipp \u0026 Zonen pyranometers and pyrgeometers. A Campbell Scientific open path eddy covariance system measured sensible and latent heat fluxes. An Apogee infrared sensor measured surface skin temperature. Sky conditions were observed using an ALCOR System digital all-sky camera. A StellarNet shortwave spectroradiometer system measured downwelling spectral irradiance in the wavelength range 350-1700 nm.", "east": -148.81, "geometry": ["POINT(-148.81 -81.65)"], "keywords": "Antarctica; Siple Dome; Spectroscopy", "locations": "Siple Dome; Antarctica", "north": -81.65, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Lubin, Dan; Ghiz, Madison", "project_titles": "Surface Energy Balance on West Antarctica and the Ross Ice Shelf", "projects": [{"proj_uid": "p0010296", "repository": "USAP-DC", "title": "Surface Energy Balance on West Antarctica and the Ross Ice Shelf"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -81.65, "title": "Siple Dome Surface Energy Flux", "uid": "601540", "west": -148.81}, {"awards": "1341333 McClintock, James; 1341339 Baker, Bill", "bounds_geometry": null, "date_created": "Tue, 15 Mar 2022 00:00:00 GMT", "description": "This file represents the raw gastropod count data used for the analyses in Amsler et al. 2022, Antarctic Science. See the methods there in the main text and supplementary material for specifics on collections and exact coordinates of the collection sites. ", "east": null, "geometry": null, "keywords": "Antarctica; Benthos; Palmer Station", "locations": "Antarctica; Palmer Station", "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "Amsler, Charles", "project_titles": "Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula - continuing", "projects": [{"proj_uid": "p0010016", "repository": "USAP-DC", "title": "Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula - continuing"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Raw gastropod collection data from Amsler et al. 2022 Antarctic Science", "uid": "601533", "west": null}, {"awards": "1947040 Postlethwait, John", "bounds_geometry": ["POLYGON((-63.1 -63.9,-63.02 -63.9,-62.94 -63.9,-62.86 -63.9,-62.78 -63.9,-62.7 -63.9,-62.62 -63.9,-62.54 -63.9,-62.46 -63.9,-62.38 -63.9,-62.3 -63.9,-62.3 -64.01,-62.3 -64.12,-62.3 -64.23,-62.3 -64.34,-62.3 -64.45,-62.3 -64.56,-62.3 -64.67,-62.3 -64.78,-62.3 -64.89,-62.3 -65,-62.38 -65,-62.46 -65,-62.54 -65,-62.62 -65,-62.7 -65,-62.78 -65,-62.86 -65,-62.94 -65,-63.02 -65,-63.1 -65,-63.1 -64.89,-63.1 -64.78,-63.1 -64.67,-63.1 -64.56,-63.1 -64.45,-63.1 -64.34,-63.1 -64.23,-63.1 -64.12,-63.1 -64.01,-63.1 -63.9))"], "date_created": "Tue, 15 Mar 2022 00:00:00 GMT", "description": "In situ hybridization of Notoxcellia coronata and host fish Trematomus scotti 18S SSU rRNA and of Notoxcellia picta and host fish Nototheniops larseni in alternate sections of tumor xenomas.", "east": -62.3, "geometry": ["POINT(-62.7 -64.45)"], "keywords": "Alveolata; Antarctica; Antarctic Peninsula; Notoxcellia Coronata; Notoxcellia Picta; Perkinsozoa; Xcellidae", "locations": "Antarctica; Antarctic Peninsula", "north": -63.9, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Desvignes, Thomas; Postlethwait, John", "project_titles": "EAGER: Origin and Physiological Consequences of a Neoplasm Outbreak in Antarctic Fish ", "projects": [{"proj_uid": "p0010221", "repository": "USAP-DC", "title": "EAGER: Origin and Physiological Consequences of a Neoplasm Outbreak in Antarctic Fish "}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.0, "title": "In situ hybridization of X-cell and host fish 18S SSU rRNA in alternate sections of tumor xenomas.", "uid": "601539", "west": -63.1}, {"awards": "1947040 Postlethwait, John", "bounds_geometry": ["POLYGON((-62.9 -64.7,-62.84 -64.7,-62.78 -64.7,-62.72 -64.7,-62.66 -64.7,-62.6 -64.7,-62.54 -64.7,-62.48 -64.7,-62.42 -64.7,-62.36 -64.7,-62.3 -64.7,-62.3 -64.73,-62.3 -64.76,-62.3 -64.79,-62.3 -64.82,-62.3 -64.85,-62.3 -64.88,-62.3 -64.91,-62.3 -64.94,-62.3 -64.97,-62.3 -65,-62.36 -65,-62.42 -65,-62.48 -65,-62.54 -65,-62.6 -65,-62.66 -65,-62.72 -65,-62.78 -65,-62.84 -65,-62.9 -65,-62.9 -64.97,-62.9 -64.94,-62.9 -64.91,-62.9 -64.88,-62.9 -64.85,-62.9 -64.82,-62.9 -64.79,-62.9 -64.76,-62.9 -64.73,-62.9 -64.7))"], "date_created": "Tue, 15 Mar 2022 00:00:00 GMT", "description": "Multi-layer 3D models and videos of Tsco_18_08 from high-field microMRI data.", "east": -62.3, "geometry": ["POINT(-62.6 -64.85)"], "keywords": "Alveolata; Antarctica; Antarctic Peninsula; Notoxcellia Coronata; Notoxcellia Picta; Perkinsozoa; Xcellidae", "locations": "Antarctic Peninsula; Antarctica", "north": -64.7, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Lauridsen, Henrik; Desvignes, Thomas; Postlethwait, John", "project_titles": "EAGER: Origin and Physiological Consequences of a Neoplasm Outbreak in Antarctic Fish ", "projects": [{"proj_uid": "p0010221", "repository": "USAP-DC", "title": "EAGER: Origin and Physiological Consequences of a Neoplasm Outbreak in Antarctic Fish "}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.0, "title": "microMRI analyses of Trematomus scotti Tsco_18_08 with X-cell xenomas", "uid": "601538", "west": -62.9}, {"awards": "1947040 Postlethwait, John", "bounds_geometry": ["POLYGON((-63.1 -63.9,-63.02 -63.9,-62.94 -63.9,-62.86 -63.9,-62.78 -63.9,-62.7 -63.9,-62.62 -63.9,-62.54 -63.9,-62.46 -63.9,-62.38 -63.9,-62.3 -63.9,-62.3 -64.01,-62.3 -64.12,-62.3 -64.23,-62.3 -64.34,-62.3 -64.45,-62.3 -64.56,-62.3 -64.67,-62.3 -64.78,-62.3 -64.89,-62.3 -65,-62.38 -65,-62.46 -65,-62.54 -65,-62.62 -65,-62.7 -65,-62.78 -65,-62.86 -65,-62.94 -65,-63.02 -65,-63.1 -65,-63.1 -64.89,-63.1 -64.78,-63.1 -64.67,-63.1 -64.56,-63.1 -64.45,-63.1 -64.34,-63.1 -64.23,-63.1 -64.12,-63.1 -64.01,-63.1 -63.9))"], "date_created": "Mon, 14 Mar 2022 00:00:00 GMT", "description": "Metagenomic analyses of apparently healthy and tumor samples using Kaiju v.1.7.4 software and a custom database generated from NCBI NR database retrieved on July 24th, 2021, and containing all viruses, archaea, and bacteria sequences, as well as microbial eukaryotes and Trematomus spp. fish sequences.", "east": -62.3, "geometry": ["POINT(-62.7 -64.45)"], "keywords": "Alveolata; 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Antarctica; Antarctic Peninsula; Notoxcellia Coronata; Notoxcellia Picta; Perkinsozoa; Xcellidae", "locations": "Antarctic Peninsula; Antarctica", "north": -63.9, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Desvignes, Thomas; Kent, Michael L. ; Murray, Katrina N. ; Postlethwait, John", "project_titles": "EAGER: Origin and Physiological Consequences of a Neoplasm Outbreak in Antarctic Fish ", "projects": [{"proj_uid": "p0010221", "repository": "USAP-DC", "title": "EAGER: Origin and Physiological Consequences of a Neoplasm Outbreak in Antarctic Fish "}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.0, "title": "Histopathology of X-cell xenomas in Trematomus scotti and Nototheniops larseni.", "uid": "601536", "west": -63.1}, {"awards": "1643868 DeWitt, Regina; 1644197 Simms, Alexander", "bounds_geometry": ["POLYGON((-65 -61,-64 -61,-63 -61,-62 -61,-61 -61,-60 -61,-59 -61,-58 -61,-57 -61,-56 -61,-55 -61,-55 -61.4,-55 -61.8,-55 -62.2,-55 -62.6,-55 -63,-55 -63.4,-55 -63.8,-55 -64.2,-55 -64.6,-55 -65,-56 -65,-57 -65,-58 -65,-59 -65,-60 -65,-61 -65,-62 -65,-63 -65,-64 -65,-65 -65,-65 -64.6,-65 -64.2,-65 -63.8,-65 -63.4,-65 -63,-65 -62.6,-65 -62.2,-65 -61.8,-65 -61.4,-65 -61))"], "date_created": "Fri, 11 Mar 2022 00:00:00 GMT", "description": "detailed results for rock and sediment OSL ages; 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feldspar separates were prepared; data set includes Electron microprobe analysis of selected feldspar extracts; includes bmp and tif with elemental maps plus elemental concentrations and Ca:Na:K ratios for feldspar analysis", "east": -55.0, "geometry": ["POINT(-60 -63)"], "keywords": "Antarctica; Geochronology; Joinville Island; Livingston Island; OSL dating; Raised Beaches", "locations": "Livingston Island; Antarctica; Joinville Island", "north": -61.0, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Earth Sciences", "persons": "DeWitt, Regina", "project_titles": "Collaborative Research: New Constraints on Post-Glacial Rebound and Holocene Environmental History along the Northern Antarctic Peninsula from Raised Beaches", "projects": [{"proj_uid": "p0010132", "repository": "USAP-DC", "title": "Collaborative Research: New Constraints on Post-Glacial Rebound and Holocene Environmental History along the Northern Antarctic Peninsula from Raised Beaches"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.0, "title": "Electron Microprobe Analysis of feldspar separates from rock and sediment OSL samples from Joinville and Livingston Island Beaches", "uid": "601531", "west": -65.0}, {"awards": "1744760 Hopkinson, Brian; 1745036 Marchetti, Adrian", "bounds_geometry": null, "date_created": "Sat, 05 Mar 2022 00:00:00 GMT", "description": "This dataset contains measurements of photosynthetic physiological traits of various species of Southern Ocean marine diatoms when grown under differing levels of iron availability ", "east": null, "geometry": null, "keywords": "Antarctica; Diatom", "locations": "Antarctica", "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "Hopkinson, Brian; Plumb, Kaylie; Marchetti, Adrian; Andrew, Sarah", "project_titles": "Collaborative research: Antarctic diatom proteorhodopsins: Characterization and a potential role in the iron-limitation response", "projects": [{"proj_uid": "p0010033", "repository": "USAP-DC", "title": "Collaborative research: Antarctic diatom proteorhodopsins: Characterization and a potential role in the iron-limitation response"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Photosynthetic physiological data of Proteorhodopsin containing diatoms under differing iron availabilities", "uid": "601530", "west": null}, {"awards": "0944150 Hall, Brenda; 1643248 Hall, Brenda", "bounds_geometry": ["POLYGON((164 -78,164.04 -78,164.08 -78,164.12 -78,164.16 -78,164.2 -78,164.24 -78,164.28 -78,164.32 -78,164.36 -78,164.4 -78,164.4 -78.01,164.4 -78.02,164.4 -78.03,164.4 -78.04,164.4 -78.05,164.4 -78.06,164.4 -78.07,164.4 -78.08,164.4 -78.09,164.4 -78.1,164.36 -78.1,164.32 -78.1,164.28 -78.1,164.24 -78.1,164.2 -78.1,164.16 -78.1,164.12 -78.1,164.08 -78.1,164.04 -78.1,164 -78.1,164 -78.09,164 -78.08,164 -78.07,164 -78.06,164 -78.05,164 -78.04,164 -78.03,164 -78.02,164 -78.01,164 -78))"], "date_created": "Tue, 01 Mar 2022 00:00:00 GMT", "description": "This dataset contains raw and calibrated radiocarbon data for lacustrine algal layers from glacial lacustrine deposits associated with Ross Sea drift in Marshall Valley.", "east": 164.4, "geometry": ["POINT(164.2 -78.05)"], "keywords": "Algae; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Marshall Valley; Radiocarbon; Ross Sea Drift; Royal Society Range", "locations": "Marshall Valley; Ross Sea Drift; Antarctica; Royal Society Range", "north": -78.0, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Glaciology", "persons": "Hall, Brenda", "project_titles": "Response of the Antarctic Ice Sheet to the last great global warming; Sensitivity of the Antarctic Ice Sheet to Climate Change over the Last Two Glacial/Interglacial Cycles", "projects": [{"proj_uid": "p0010302", "repository": "USAP-DC", "title": "Sensitivity of the Antarctic Ice Sheet to Climate Change over the Last Two Glacial/Interglacial Cycles"}, {"proj_uid": "p0010301", "repository": "USAP-DC", "title": "Response of the Antarctic Ice Sheet to the last great global warming"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.1, "title": "Marshall Valley Radiocarbon Data", "uid": "601529", "west": 164.0}, {"awards": "1643248 Hall, Brenda; 0944150 Hall, Brenda", "bounds_geometry": ["POLYGON((164 -78,164.04 -78,164.08 -78,164.12 -78,164.16 -78,164.2 -78,164.24 -78,164.28 -78,164.32 -78,164.36 -78,164.4 -78,164.4 -78.01,164.4 -78.02,164.4 -78.03,164.4 -78.04,164.4 -78.05,164.4 -78.06,164.4 -78.07,164.4 -78.08,164.4 -78.09,164.4 -78.1,164.36 -78.1,164.32 -78.1,164.28 -78.1,164.24 -78.1,164.2 -78.1,164.16 -78.1,164.12 -78.1,164.08 -78.1,164.04 -78.1,164 -78.1,164 -78.09,164 -78.08,164 -78.07,164 -78.06,164 -78.05,164 -78.04,164 -78.03,164 -78.02,164 -78.01,164 -78))"], "date_created": "Tue, 01 Mar 2022 00:00:00 GMT", "description": "This dataset includes 234U/230Th chronologic data for lacustrine carbonates associated with Marshall drift in Marshall Valley, Royal Society Range. These samples are from ice-dammed lake deposits associated with a grounded ice sheet that blocked the valley mouth. Sample chemistry was done at the University of Maine geochemistry laboratory. Processed samples were analyzed on a multicollector ICP-MS at the University of Oxford. Corrected ages reflect a detrital correction based on typical upper-crustal (230Th/232Th) values of 1.21 with a 50% assumed error.", "east": 164.4, "geometry": ["POINT(164.2 -78.05)"], "keywords": "234U/230Th Dating; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Last Glacial Maximum; Marshall Drift; Marshall Valley; MIS 6; Royal Society Range", "locations": "Royal Society Range; Antarctica; Marshall Valley", "north": -78.0, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Glaciology", "persons": "Hall, Brenda", "project_titles": "Response of the Antarctic Ice Sheet to the last great global warming; Sensitivity of the Antarctic Ice Sheet to Climate Change over the Last Two Glacial/Interglacial Cycles", "projects": [{"proj_uid": "p0010301", "repository": "USAP-DC", "title": "Response of the Antarctic Ice Sheet to the last great global warming"}, {"proj_uid": "p0010302", "repository": "USAP-DC", "title": "Sensitivity of the Antarctic Ice Sheet to Climate Change over the Last Two Glacial/Interglacial Cycles"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.1, "title": "Marshall Valley U-Series Data", "uid": "601528", "west": 164.0}, {"awards": "1643917 Fricker, Helen", "bounds_geometry": ["POLYGON((-163.646 -84.186,-162.58715 -84.186,-161.5283 -84.186,-160.46945 -84.186,-159.4106 -84.186,-158.35175 -84.186,-157.2929 -84.186,-156.23405 -84.186,-155.1752 -84.186,-154.11635 -84.186,-153.0575 -84.186,-153.0575 -84.20871,-153.0575 -84.23142,-153.0575 -84.25413,-153.0575 -84.27684,-153.0575 -84.29955,-153.0575 -84.32226,-153.0575 -84.34497,-153.0575 -84.36768,-153.0575 -84.39039,-153.0575 -84.4131,-154.11635 -84.4131,-155.1752 -84.4131,-156.23405 -84.4131,-157.2929 -84.4131,-158.35175 -84.4131,-159.4106 -84.4131,-160.46945 -84.4131,-161.5283 -84.4131,-162.58715 -84.4131,-163.646 -84.4131,-163.646 -84.39039,-163.646 -84.36768,-163.646 -84.34497,-163.646 -84.32226,-163.646 -84.29955,-163.646 -84.27684,-163.646 -84.25413,-163.646 -84.23142,-163.646 -84.20871,-163.646 -84.186))"], "date_created": "Fri, 25 Feb 2022 00:00:00 GMT", "description": "This archive contains magnetotelluric (MT) responses estimated from MT time series data that were collected to study subglacial groundwater beneath Whillans Ice Stream, West Antarctica. Data acquisition took place during the 2018/2019 Antarctic summer field season. 27 MT stations were collected at Whillans Subglacial Lake (SLW) and 16 stations were obtained at its hypothesized downstream outlet to the ocean, Whillans Grounding Zone (WGZ). The MT responses are provided as text files in the .zmm format output by the MT data processing code, but have also been converted to the more widely used .edi text file format for convenience. All sensor orientations are listed as geomagnetic azimuths, which for this region are substantially different than the corresponding geographic azimuths.", "east": -153.0575, "geometry": ["POINT(-158.35175 -84.29955)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Stream; Magnetotelluric; Subglacial; Whillans Ice Stream", "locations": "Whillans Ice Stream; Antarctica", "north": -84.186, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Gustafson, Chloe; Key, Kerry; Siegfried, Matthew; Fricker, Helen", "project_titles": "Mapping Antarctic Subglacial Water with Novel Electromagnetic Techniques", "projects": [{"proj_uid": "p0010300", "repository": "USAP-DC", "title": "Mapping Antarctic Subglacial Water with Novel Electromagnetic Techniques"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -84.4131, "title": "Wideband magnetotelluric responses from Whillans Ice Stream, West Antarctica", "uid": "601526", "west": -163.646}, {"awards": "1443471 Koutnik, Michelle", "bounds_geometry": ["POINT(137.04 -89.54)"], "date_created": "Tue, 22 Feb 2022 00:00:00 GMT", "description": "These data are 6-hourly measurements of temperature in the upper 40 m of firn at a site 50 km upstream of South Pole (89.54 S, 137.04 E). The measurements span the two years from January 2017 to December 2018. ", "east": 137.04, "geometry": ["POINT(137.04 -89.54)"], "keywords": "Antarctica; Firn; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Data; Ice Core Records; Snow/ice; Snow/Ice; South Pole; SPICEcore; Temperature", "locations": "Antarctica; South Pole; Antarctica", "north": -89.54, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Stevens, Christopher Max; Lilien, David; Conway, Howard; Koutnik, Michelle; Waddington, Edwin D.; Fudge, T. J.", "project_titles": "Collaborative Research: Characterization of Upstream Ice and Firn Dynamics affecting the South Pole Ice Core", "projects": [{"proj_uid": "p0000200", "repository": "USAP-DC", "title": "Collaborative Research: Characterization of Upstream Ice and Firn Dynamics affecting the South Pole Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -89.54, "title": "Firn temperatures 50km upstream of South Pole", "uid": "601525", "west": 137.04}, {"awards": "1543539 Liwanag, Heather", "bounds_geometry": null, "date_created": "Fri, 18 Feb 2022 00:00:00 GMT", "description": "Oxygen consumption of Weddell seal pups (n = 8) placed in a metabolic chamber filed with air or water. Data were collected during 2017 and 2019. Each pup was measured every 2 weeks starting from 1 week of age to 7 weeks of age, resulting in 4 age timepoints. ", "east": null, "geometry": null, "keywords": "Antarctica; McMurdo Sound; Metabolic Rate; Thermoregulation; Weddell Seal", "locations": "Antarctica; McMurdo Sound", "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Pearson, Linnea", "project_titles": "RUI: Growing Up on Ice: Physiological Adaptations and Developmental Plasticity in Weddell Seal Pups Across Two Extreme Physical Environments", "projects": [{"proj_uid": "p0010144", "repository": "USAP-DC", "title": "RUI: Growing Up on Ice: Physiological Adaptations and Developmental Plasticity in Weddell Seal Pups Across Two Extreme Physical Environments"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "metabolic measurements", "uid": "601524", "west": null}, {"awards": "1341464 Robinson, Rebecca", "bounds_geometry": ["POLYGON((-170.4 -60.8,-170.36 -60.8,-170.32 -60.8,-170.28 -60.8,-170.24 -60.8,-170.2 -60.8,-170.16 -60.8,-170.12 -60.8,-170.08 -60.8,-170.04 -60.8,-170 -60.8,-170 -61.34,-170 -61.88,-170 -62.42,-170 -62.96,-170 -63.5,-170 -64.04,-170 -64.58,-170 -65.12,-170 -65.66,-170 -66.2,-170.04 -66.2,-170.08 -66.2,-170.12 -66.2,-170.16 -66.2,-170.2 -66.2,-170.24 -66.2,-170.28 -66.2,-170.32 -66.2,-170.36 -66.2,-170.4 -66.2,-170.4 -65.66,-170.4 -65.12,-170.4 -64.58,-170.4 -64.04,-170.4 -63.5,-170.4 -62.96,-170.4 -62.42,-170.4 -61.88,-170.4 -61.34,-170.4 -60.8))"], "date_created": "Mon, 14 Feb 2022 00:00:00 GMT", "description": "Tracking variations in the surface ocean supply and demand of nitrate, a key marine nutrient, can help constrain the contribution of biological production in driving past climate shifts. The nitrogen isotopic composition (as \u03b415N) of organic matter in marine sediments is a proxy for surface ocean nitrate supply and demand over time but it may be subject to alteration during sinking and burial. The isotopic composition of nitrogen contained in the shells, or frustules, of diatoms (\u03b415NDB) is protected and is therefore a potentially more robust tracer of nitrate use in the past. Here we show that \u03b415NDB in Southern Ocean community cultures does not depend on species composition. We found the \u03b5DB (= biomass \u03b415N - \u03b415NDB) of the community growouts was -4.8 \u00b1 0.8\u2030, more than 10\u2030 different from previous monospecific growouts, but statistically indistinguishable from previous Southern Ocean and North Pacific surface ocean observations. The two community growouts, seeded with populations from 66\u00b0 and 61\u00b0S, had distinct community compositions but indistinguishable \u03b5DB, suggesting species composition does not primarily set \u03b415NDB values in the Southern Ocean. Our results demonstrate that under nitrate-replete conditions, \u03b415NDB values of frustules sinking from the surface ocean robustly track surface ocean nitrate \u03b415N values and therefore nitrate supply and demand. ", "east": -170.0, "geometry": ["POINT(-170.2 -63.5)"], "keywords": "Antarctica; Nitrogen Isotopes; Oceans; Paleoproxies; Southern Ocean", "locations": "Southern Ocean; Antarctica", "north": -60.8, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Jones, Colin; Robinson, Rebecca; Brzezinski, Mark; Riesselman, Christina; Closset, Ivia; Kelly, Roger; Robinson, Rebecca ", "project_titles": "Collaborative Proposal: A Field and Laboratory Examination of the Diatom N and Si Isotope Proxies: Implications for Assessing the Southern Ocean Biological Pump", "projects": [{"proj_uid": "p0010083", "repository": "USAP-DC", "title": "Collaborative Proposal: A Field and Laboratory Examination of the Diatom N and Si Isotope Proxies: Implications for Assessing the Southern Ocean Biological Pump"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -66.2, "title": "Surface Southern Ocean community growouts to evaluate the diatom bound N isotope proxy", "uid": "601522", "west": -170.4}, {"awards": "1341464 Robinson, Rebecca", "bounds_geometry": ["POLYGON((-170.4 -60.8,-170.36 -60.8,-170.32 -60.8,-170.28 -60.8,-170.24 -60.8,-170.2 -60.8,-170.16 -60.8,-170.12 -60.8,-170.08 -60.8,-170.04 -60.8,-170 -60.8,-170 -61.34,-170 -61.88,-170 -62.42,-170 -62.96,-170 -63.5,-170 -64.04,-170 -64.58,-170 -65.12,-170 -65.66,-170 -66.2,-170.04 -66.2,-170.08 -66.2,-170.12 -66.2,-170.16 -66.2,-170.2 -66.2,-170.24 -66.2,-170.28 -66.2,-170.32 -66.2,-170.36 -66.2,-170.4 -66.2,-170.4 -65.66,-170.4 -65.12,-170.4 -64.58,-170.4 -64.04,-170.4 -63.5,-170.4 -62.96,-170.4 -62.42,-170.4 -61.88,-170.4 -61.34,-170.4 -60.8))"], "date_created": "Mon, 14 Feb 2022 00:00:00 GMT", "description": "Community composition data, generated in support of a field-based experimental investigation of the role of diatom assemblages in setting the isotopic composition of diatom bound N, show significant assemblage differences between ~66S and ~61S in the Southern Ocean during the late summer.", "east": -170.0, "geometry": ["POINT(-170.2 -63.5)"], "keywords": "Antarctica; Biota; Carboy Growouts; Diatom; Diatom Assemblage Data; NBP1702; Oceans; R/v Nathaniel B. Palmer; Southern Ocean; Southern Ocean Summer", "locations": "Antarctica; Southern Ocean", "north": -60.8, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Jones, Colin; Robinson, Rebecca; Riesselman, Christina; Robinson, Rebecca ", "project_titles": "Collaborative Proposal: A Field and Laboratory Examination of the Diatom N and Si Isotope Proxies: Implications for Assessing the Southern Ocean Biological Pump", "projects": [{"proj_uid": "p0010083", "repository": "USAP-DC", "title": "Collaborative Proposal: A Field and Laboratory Examination of the Diatom N and Si Isotope Proxies: Implications for Assessing the Southern Ocean Biological Pump"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -66.2, "title": "Diatom assemblage counts from NBP17-02 shipboard carboy experiments", "uid": "601523", "west": -170.4}, {"awards": "1946326 Doran, Peter", "bounds_geometry": ["POLYGON((163.079602 -77.585467,163.1197073 -77.585467,163.1598126 -77.585467,163.1999179 -77.585467,163.2400232 -77.585467,163.2801285 -77.585467,163.3202338 -77.585467,163.3603391 -77.585467,163.4004444 -77.585467,163.4405497 -77.585467,163.480655 -77.585467,163.480655 -77.5924303,163.480655 -77.5993936,163.480655 -77.6063569,163.480655 -77.6133202,163.480655 -77.6202835,163.480655 -77.6272468,163.480655 -77.6342101,163.480655 -77.6411734,163.480655 -77.6481367,163.480655 -77.6551,163.4405497 -77.6551,163.4004444 -77.6551,163.3603391 -77.6551,163.3202338 -77.6551,163.2801285 -77.6551,163.2400232 -77.6551,163.1999179 -77.6551,163.1598126 -77.6551,163.1197073 -77.6551,163.079602 -77.6551,163.079602 -77.6481367,163.079602 -77.6411734,163.079602 -77.6342101,163.079602 -77.6272468,163.079602 -77.6202835,163.079602 -77.6133202,163.079602 -77.6063569,163.079602 -77.5993936,163.079602 -77.5924303,163.079602 -77.585467))"], "date_created": "Wed, 09 Feb 2022 00:00:00 GMT", "description": "Location and metadata of C-14 samples from Taylor Valley, East Antarctica", "east": 163.480655, "geometry": ["POINT(163.2801285 -77.6202835)"], "keywords": "Antarctica; Carbon-14; Sample/collection Description; Sample/Collection Description; Sample Location; Taylor Valley", "locations": "Antarctica; Taylor Valley", "north": -77.585467, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Doran, Peter; Stone, Michael", "project_titles": "EAGER: Refining glacial lake history in Taylor Valley, East Antarctica with alternative geochronometers", "projects": [{"proj_uid": "p0010294", "repository": "USAP-DC", "title": "EAGER: Refining glacial lake history in Taylor Valley, East Antarctica with alternative geochronometers"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.6551, "title": "EAGER: Refining glacial lake history in Taylor Valley, East Antarctica with alternative geochronometers: in situ 14C data", "uid": "601521", "west": 163.079602}, {"awards": "1946326 Doran, Peter", "bounds_geometry": ["POLYGON((163.093642 -77.592484,163.1049267 -77.592484,163.1162114 -77.592484,163.1274961 -77.592484,163.1387808 -77.592484,163.1500655 -77.592484,163.1613502 -77.592484,163.1726349 -77.592484,163.1839196 -77.592484,163.1952043 -77.592484,163.206489 -77.592484,163.206489 -77.5986389,163.206489 -77.6047938,163.206489 -77.6109487,163.206489 -77.6171036,163.206489 -77.6232585,163.206489 -77.6294134,163.206489 -77.6355683,163.206489 -77.6417232,163.206489 -77.6478781,163.206489 -77.654033,163.1952043 -77.654033,163.1839196 -77.654033,163.1726349 -77.654033,163.1613502 -77.654033,163.1500655 -77.654033,163.1387808 -77.654033,163.1274961 -77.654033,163.1162114 -77.654033,163.1049267 -77.654033,163.093642 -77.654033,163.093642 -77.6478781,163.093642 -77.6417232,163.093642 -77.6355683,163.093642 -77.6294134,163.093642 -77.6232585,163.093642 -77.6171036,163.093642 -77.6109487,163.093642 -77.6047938,163.093642 -77.5986389,163.093642 -77.592484))"], "date_created": "Wed, 09 Feb 2022 00:00:00 GMT", "description": "Location and metadata of samples collected from perched delta deposits along modern stream channels in lower Taylor Valley. Sample collection used equipment and followed procedures from the Desert Research Institute Luminescence Laboratory in Reno, NV.", "east": 163.206489, "geometry": ["POINT(163.1500655 -77.6232585)"], "keywords": "Antarctica; Sample/collection Description; Sample/Collection Description; Sample Location; Taylor Valley", "locations": "Taylor Valley; Antarctica", "north": -77.592484, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Doran, Peter; Stone, Michael", "project_titles": "EAGER: Refining glacial lake history in Taylor Valley, East Antarctica with alternative geochronometers", "projects": [{"proj_uid": "p0010294", "repository": "USAP-DC", "title": "EAGER: Refining glacial lake history in Taylor Valley, East Antarctica with alternative geochronometers"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "LTER", "south": -77.654033, "title": "EAGER: Refining glacial lake history in Taylor Valley, East Antarctica with alternative geochronometers: Infrared Stimulated Luminescence data", "uid": "601520", "west": 163.093642}, {"awards": "1643494 Saal, Alberto", "bounds_geometry": ["POLYGON((-68.074 -57.345,-66.6033 -57.345,-65.1326 -57.345,-63.6619 -57.345,-62.1912 -57.345,-60.7205 -57.345,-59.2498 -57.345,-57.7791 -57.345,-56.3084 -57.345,-54.8377 -57.345,-53.367 -57.345,-53.367 -58.1252,-53.367 -58.9054,-53.367 -59.6856,-53.367 -60.4658,-53.367 -61.246,-53.367 -62.0262,-53.367 -62.8064,-53.367 -63.5866,-53.367 -64.3668,-53.367 -65.147,-54.8377 -65.147,-56.3084 -65.147,-57.7791 -65.147,-59.2498 -65.147,-60.7205 -65.147,-62.1912 -65.147,-63.6619 -65.147,-65.1326 -65.147,-66.6033 -65.147,-68.074 -65.147,-68.074 -64.3668,-68.074 -63.5866,-68.074 -62.8064,-68.074 -62.0262,-68.074 -61.246,-68.074 -60.4658,-68.074 -59.6856,-68.074 -58.9054,-68.074 -58.1252,-68.074 -57.345))"], "date_created": "Mon, 07 Feb 2022 00:00:00 GMT", "description": "", "east": -53.367, "geometry": ["POINT(-60.7205 -61.246)"], "keywords": "Antarctica; Antarctic Peninsula; Chemical Composition; Chemistry:rock; Chemistry:Rock; Geochemistry; Isotope Data; Trace Elements", "locations": "Antarctica; Antarctic Peninsula", "north": -57.345, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Saal, Alberto", "project_titles": "Magmatic Volatiles, Unraveling the Reservoirs and Processes of the Volcanism in the Antarctic Peninsula", "projects": [{"proj_uid": "p0010196", "repository": "USAP-DC", "title": "Magmatic Volatiles, Unraveling the Reservoirs and Processes of the Volcanism in the Antarctic Peninsula"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.147, "title": "Major, trace elements contents and radiogenic isotopes of erupted lavas Antarctic Peninsula and Phoenix Ridge", "uid": "601519", "west": -68.074}, {"awards": "1840058 Jenouvrier, Stephanie", "bounds_geometry": null, "date_created": "Fri, 04 Feb 2022 00:00:00 GMT", "description": "Many animals form long-term monogamous pair-bonds, and the disruption of a pair-bond (through either divorce or widowhood) can have significant consequences for individual vital rates (survival, breeding, and breeding success probabilities) and life-history outcomes (lifetime reproductive success, life expectancy). Here, we investigated the causes and consequences of pair-bond disruption in wandering albatross (Diomedea exulans). State-of-the-art statistical and mathematical approaches were developed to estimate divorce and widowhood rates and their impacts on vital rates and life-history outcomes. In this population, females incur a higher mortality rate due to incidental fishery bycatch, hence the population is male-skewed. Therefore, we first posited that males show higher widowhood rates negatively correlated with fishing effort, and females have higher divorce rates because they have more mating opportunities. Furthermore, we expected that divorce can be an adaptive strategy, whereby individuals improve breeding success by breeding with a new partner of better quality. Finally, we posited that pair-bond disruptions can reduce survival and breeding probabilities due to the cost of remating processes, with important consequences for life-history outcomes. As expected, we show that males have higher widowhood rates than females and females have higher divorce rates in this male-skewed population. However, no correlation was found between fishing effort and male widowhood. Secondly, contrary to our expectation, we found that divorce is likely non-adaptive in this population. We propose that divorce in this population is caused by an intruder who outcompetes the original partner in line with the \"forced divorce\" hypothesis. Furthermore, we found a 16.7% and 18.0% reduction in lifetime reproductive success (LRS) only for divorced and widowed males, respectively, due to missing breeding seasons after a pair-bond disruption. Finally, we found that divorced individuals are more likely to divorce again, but whether this is related to specific individual characteristics remains an important area of investigation. \r\n\r\nDescription of data processing:\r\nThis file includes: (1) observation events data; (2) E-surge GEPAT (Generator of pattern of elementary matrices) code for fitting MULTIEVENT-CAPTURE-MARK-RECAPTURE (MECMR) models; and (3) pair-bond status and breeding success data to perform all the analysis described in Sun et al. (2022, Ecological Monographs) ", "east": null, "geometry": null, "keywords": "Antarctica; Biota; Wandering Albatross", "locations": "Antarctica", "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Jenouvrier, Stephanie; Sun, Ruijiao; Barbraud, Christophe; Delord, Karine", "project_titles": "Polar Seabirds with Long-term Pair Bonds: Effects of Mating on Individual Fitness and Population Dynamics", "projects": [{"proj_uid": "p0010090", "repository": "USAP-DC", "title": "Polar Seabirds with Long-term Pair Bonds: Effects of Mating on Individual Fitness and Population Dynamics"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Causes and consequences of pair-bond disruption in a sex-skewed population of a long-lived monogamous seabird: the wandering Albatross", "uid": "601518", "west": null}, {"awards": "1443710 Severinghaus, Jeffrey", "bounds_geometry": ["POINT(0 -90)"], "date_created": "Thu, 03 Feb 2022 00:00:00 GMT", "description": "We present measurements gas measurements from the South Pole Ice Core, including the isotopic composition of molecular nitrogen (\u03b415N) and argon (\u03b440Ar), and the argon-nitrogen ratio (\u03b4Ar/N2). The measurements were made between approximately 490 and 1310 m depth, which is between 5 and 30 kyr BP on the SP19 Gas Chronology.\r\nThe measurements allow us to reconstruct the past amounts of gravitational and thermal fractionation in the firn and thus reconstruct past firn thickness and temperature gradient. These reconstructions are also included.\r\n", "east": 0.0, "geometry": ["POINT(0 -90)"], "keywords": "Antarctica; Argon; Argon Isotopes; Firn; Firn Temperature Gradient; Firn Thickness; Gas Isotopes; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core; Ice Core Records; Nitrogen; Nitrogen Isotopes; South Pole; SPICEcore", "locations": "Antarctica; South Pole; South Pole; Antarctica", "north": -90.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Morgan, Jacob; Severinghaus, Jeffrey P.", "project_titles": "Collaborative Research: Inert Gas and Methane Based Climate Records throughout the South Pole Deep Ice Core", "projects": [{"proj_uid": "p0010005", "repository": "USAP-DC", "title": "Collaborative Research: Inert Gas and Methane Based Climate Records throughout the South Pole Deep Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -90.0, "title": "South Pole Ice Core Isotopes of N2 and Ar", "uid": "601517", "west": 0.0}, {"awards": "1744789 Padman, Laurence; 1744792 Little, Christopher", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Tue, 01 Feb 2022 00:00:00 GMT", "description": "This dataset contains NetCDF files of two-dimensional gridded fields of hydrographic properties, Conservative Temperature (CT) and Absolute Salinity (SA), around Antarctica, depth-averaged for the depth range 300 m to min([water depth, 1000]) m from 38 CMIP6 models, the World Ocean Atlas 2018, and our own product developed from the World Ocean Database. These fields are designed to represent the hydrography of deeper water masses on the Antarctic Continental Shelf (ACS), where typical water depths are 400-600 m, and the intermediate-depth water off the continental shelf. The dataset includes a high-resolution polar-stereographic grid (2 x 2 km) of Southern Ocean geometry, including water depth, elevation of the land and ice-sheet surface (including ice shelves), a mask (identifying water, land and grounded ice, and ice shelves), and offshore distance from the continental shelf break. An example MATLAB script for accessing the grids and plotting them is included. The primary purpose of this dataset is to provide simplified 2-D hydrographic fields that can be used to assess the performance of climate models for the ACS, focusing on the depth range that affects most basal melting of Antarctica\u2019s ice shelves.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Antarctic Continental Shelf; CMIP6; Oceans; Physical Oceanography; Salinity; Southern Ocean; Temperature", "locations": "Antarctica; Southern Ocean", "north": -60.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences; Antarctic Ocean and Atmospheric Sciences", "persons": "Howard, Susan L.; Little, Chris; Sun, Qiang; Padman, Laurence", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -90.0, "title": "Gridded Values of Conservative Temperature and Absolute Salinity Around Antarctica averaged for the depth range 300 m to min([water depth, 1000]) m", "uid": "601516", "west": -180.0}, {"awards": "1643120 Iverson, Neal", "bounds_geometry": null, "date_created": "Tue, 01 Feb 2022 00:00:00 GMT", "description": "This dataset contains parameters and results of laboratory experiments in which the permeability of temperate ice was measured for various grain sizes and hydraulic gradients.", "east": null, "geometry": null, "keywords": "Antarctica; Glacier Flow; Glacier Hydrology; Glaciological Instruments And Methods; Glaciology; Ice Physics; Ice Stream; Snow/ice; Snow/Ice", "locations": "Antarctica", "north": null, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Iverson, Neal; Fowler, Jacob", "project_titles": "NSFGEO-NERC: Collaborative Research: Two-Phase Dynamics of Temperate Ice", "projects": [{"proj_uid": "p0010197", "repository": "USAP-DC", "title": "NSFGEO-NERC: Collaborative Research: Two-Phase Dynamics of Temperate Ice"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Ice permeameter experimental parameters and results", "uid": "601515", "west": null}, {"awards": "1738942 Wellner, Julia", "bounds_geometry": ["POLYGON((-107.38 -74.64,-107.065 -74.64,-106.75 -74.64,-106.435 -74.64,-106.12 -74.64,-105.805 -74.64,-105.49 -74.64,-105.175 -74.64,-104.86 -74.64,-104.545 -74.64,-104.23 -74.64,-104.23 -74.683,-104.23 -74.726,-104.23 -74.769,-104.23 -74.812,-104.23 -74.855,-104.23 -74.898,-104.23 -74.941,-104.23 -74.984,-104.23 -75.027,-104.23 -75.07,-104.545 -75.07,-104.86 -75.07,-105.175 -75.07,-105.49 -75.07,-105.805 -75.07,-106.12 -75.07,-106.435 -75.07,-106.75 -75.07,-107.065 -75.07,-107.38 -75.07,-107.38 -75.027,-107.38 -74.984,-107.38 -74.941,-107.38 -74.898,-107.38 -74.855,-107.38 -74.812,-107.38 -74.769,-107.38 -74.726,-107.38 -74.683,-107.38 -74.64))"], "date_created": "Thu, 27 Jan 2022 00:00:00 GMT", "description": "This dataset contains measurements from grain-size, x-ray fluorescence (XRF), and physical properties (including magnetic susceptibility, water content, and shear strength) analyses of five sediment cores collected offshore Thwaites Glacier during cruises NBP19-02 (cores KC04, KC08, and KC23) and NBP20-02 (cores KC33 and KC67). We estimate the cores, which are between 213.5 and 297.5 cm in length, reflect deposition during the last ~10 kyr, consistent with published constraints of deglaciation of this region. Data are organized in Microsoft Excel spreadsheets and core locations are provided in a PDF.", "east": -104.23, "geometry": ["POINT(-105.805 -74.855)"], "keywords": "Antarctica; Chemistry:sediment; Chemistry:Sediment; Glaciomarine Sediment; Grain Size; Magnetic Susceptibility; Marine Geoscience; Marine Sediments; NBP1902; NBP2002; Physical Properties; R/v Nathaniel B. Palmer; Sediment Core Data; Thwaites Glacier; Trace Elements; XRF", "locations": "Antarctica; Thwaites Glacier", "north": -74.64, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Lepp, Allison", "project_titles": "NSF-NERC: THwaites Offshore Research (THOR)", "projects": [{"proj_uid": "p0010062", "repository": "USAP-DC", "title": "NSF-NERC: THwaites Offshore Research (THOR)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -75.07, "title": "Physical and geochemical data from five sediment cores collected offshore Thwaites Glacier", "uid": "601514", "west": -107.38}, {"awards": "1744794 Jenouvrier, Stephanie", "bounds_geometry": null, "date_created": "Mon, 24 Jan 2022 00:00:00 GMT", "description": "In a fast-changing world, polar ecosystems are threatened by climate variability.\r\nUnderstanding the roles of fine-scale processes, and linear and nonlinear effects of climate factors on the demography of polar species is crucial for anticipating the future state of these fragile ecosystems. While the effects of sea ice on polar marine top predators are increasingly being studied, little is known about the impacts of landfast ice (LFI) on this species community. Based on a unique 39-year time series of satellite imagery and in situ meteorological conditions and on the world\u2019s longest dataset of emperor penguin (Aptenodytes forsteri) breeding parameters, we studied the effects of fine-scale variability of LFI andweather conditions on this species\u2019 reproductive success. We found that longer distances to the LFI edge (i.e. foraging areas) negatively affected the overall breeding success but also the fledging success. Climate window analyses suggested that chick mortality was particularly sensitive\r\nto LFI variability between August and November. Snowfall in May also affected hatching success. Given the sensitivity of LFI to storms and changes in wind direction, important future repercussions on the breeding habitat of emperor penguins are to be expected in the context of climate change.\r\n\r\nThese files contain the code and data from this manuscript. ", "east": null, "geometry": null, "keywords": "Antarctica; Breeding Success; Emperor Penguin; Fast Sea Ice", "locations": "Antarctica", "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Jenouvrier, Stephanie; Labrousse, Sara", "project_titles": "A Multi-scale Approach to Understanding Spatial and Population Variability in Emperor Penguins", "projects": [{"proj_uid": "p0010229", "repository": "USAP-DC", "title": "A Multi-scale Approach to Understanding Spatial and Population Variability in Emperor Penguins"}, {"proj_uid": "p0010447", "repository": "USAP-DC", "title": "A Multi-scale Approach to Understanding Spatial and Population Variability in Emperor Penguins"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Landfast ice: a major driver of reproductive success in a polar seabird", "uid": "601513", "west": null}, {"awards": "1443263 Higgins, John", "bounds_geometry": ["POLYGON((159 -75.67,159.025 -75.67,159.05 -75.67,159.075 -75.67,159.1 -75.67,159.125 -75.67,159.15 -75.67,159.175 -75.67,159.2 -75.67,159.225 -75.67,159.25 -75.67,159.25 -75.786,159.25 -75.902,159.25 -76.018,159.25 -76.134,159.25 -76.25,159.25 -76.366,159.25 -76.482,159.25 -76.598,159.25 -76.714,159.25 -76.83,159.225 -76.83,159.2 -76.83,159.175 -76.83,159.15 -76.83,159.125 -76.83,159.1 -76.83,159.075 -76.83,159.05 -76.83,159.025 -76.83,159 -76.83,159 -76.714,159 -76.598,159 -76.482,159 -76.366,159 -76.25,159 -76.134,159 -76.018,159 -75.902,159 -75.786,159 -75.67))"], "date_created": "Mon, 24 Jan 2022 00:00:00 GMT", "description": "This file includes the \u03b415N of N2, \u03b418O of O2 (\u03b418Oatm), \u03b4O2/N2, and \u03b4Ar/N2 in the S27 ice core drilled in Allan Hills Blue Ice Area.", "east": 159.25, "geometry": ["POINT(159.125 -76.25)"], "keywords": "Allan Hills; Antarctica; Blue Ice; Ice Core; Ice Core Gas Records; Isotope; Nitrogen; Oxygen", "locations": "Allan Hills; Antarctica", "north": -75.67, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Yan, Yuzhen; Bender, Michael; Higgins, John", "project_titles": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area", "projects": [{"proj_uid": "p0000760", "repository": "USAP-DC", "title": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.83, "title": "Stable isotope composition of the trapped air in the Allan Hills S27 ice core", "uid": "601512", "west": 159.0}, {"awards": "2001033 Makovicky, Peter", "bounds_geometry": ["POLYGON((-180 -84,-178.5 -84,-177 -84,-175.5 -84,-174 -84,-172.5 -84,-171 -84,-169.5 -84,-168 -84,-166.5 -84,-165 -84,-165 -84.2,-165 -84.4,-165 -84.6,-165 -84.8,-165 -85,-165 -85.2,-165 -85.4,-165 -85.6,-165 -85.8,-165 -86,-166.5 -86,-168 -86,-169.5 -86,-171 -86,-172.5 -86,-174 -86,-175.5 -86,-177 -86,-178.5 -86,180 -86,178 -86,176 -86,174 -86,172 -86,170 -86,168 -86,166 -86,164 -86,162 -86,160 -86,160 -85.8,160 -85.6,160 -85.4,160 -85.2,160 -85,160 -84.8,160 -84.6,160 -84.4,160 -84.2,160 -84,162 -84,164 -84,166 -84,168 -84,170 -84,172 -84,174 -84,176 -84,178 -84,-180 -84))"], "date_created": "Sat, 22 Jan 2022 00:00:00 GMT", "description": "Spreadsheet with provisional taxonomic identification and locality data for Early Triassic vertebrate fossils from the Allen Hills region accessioned at Field Museum, Chicago, IL", "east": 160.0, "geometry": ["POINT(177.5 -85)"], "keywords": "Allan Hills; Antarctica; Fremouw Formation; Lystrosaurus; Permo-Triassic Extinction; Prolacerta; Sample Location; Thrinaxofon; Triassic", "locations": "Antarctica; Fremouw Formation; Allan Hills", "north": -84.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Makovicky, Peter", "project_titles": "Collaborative Research: Understanding the evolution of high-latitude Permo-Triassic paleoenvironments and their vertebrate communities", "projects": [{"proj_uid": "p0010213", "repository": "USAP-DC", "title": "Collaborative Research: Understanding the evolution of high-latitude Permo-Triassic paleoenvironments and their vertebrate communities"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -86.0, "title": "Lower Triassic Antarctic vertebrate fossils at Field Museum, Chicago, IL", "uid": "601511", "west": -165.0}, {"awards": "1744835 Wagner, Till", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Tue, 18 Jan 2022 00:00:00 GMT", "description": "Because of difficulties in adequately simulating their breakup, large Antarctic icebergs to date have either not been represented in models or represented but with no breakup scheme such that they consistently survive too long and travel too far compared with observations. Here, we introduce a representation of iceberg fracturing using a breakup scheme based on the \u201cfootloose mechanism.\u201d We optimize the parameters of this breakup scheme by forcing the iceberg model with an ocean state estimate and comparing the modeled iceberg trajectories and areas with the Antarctic Iceberg Tracking Database. We show that including large icebergs and a representation of their breakup substantially affects the iceberg meltwater distribution, with implications for the circulation and stratification of the Southern Ocean.\r\n\r\nThis data link includes the model developed for the study, including a link to the forcing fields needed to replicate the model results. ", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Footloose Mechanism; Iceberg Breakup; Iceberg Decay; Model; Southern Ocean", "locations": "Antarctica; Southern Ocean", "north": -60.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences; Antarctic Ocean and Atmospheric Sciences", "persons": "Wagner, Till", "project_titles": "Modeling Giant Icebergs and Their Decay", "projects": [{"proj_uid": "p0010290", "repository": "USAP-DC", "title": "Modeling Giant Icebergs and Their Decay"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Model of iceberg drift and decay including breakup", "uid": "601510", "west": -180.0}, {"awards": "1443585 Polito, Michael; 1443386 Emslie, Steven; 1443424 McMahon, Kelton; 1826712 McMahon, Kelton", "bounds_geometry": ["POLYGON((-37.33 -54.05,-37.192 -54.05,-37.054 -54.05,-36.916 -54.05,-36.778 -54.05,-36.64 -54.05,-36.502 -54.05,-36.364 -54.05,-36.226 -54.05,-36.088 -54.05,-35.95 -54.05,-35.95 -54.107,-35.95 -54.164,-35.95 -54.221,-35.95 -54.278,-35.95 -54.335,-35.95 -54.392,-35.95 -54.449,-35.95 -54.506,-35.95 -54.563,-35.95 -54.62,-36.088 -54.62,-36.226 -54.62,-36.364 -54.62,-36.502 -54.62,-36.64 -54.62,-36.778 -54.62,-36.916 -54.62,-37.054 -54.62,-37.192 -54.62,-37.33 -54.62,-37.33 -54.563,-37.33 -54.506,-37.33 -54.449,-37.33 -54.392,-37.33 -54.335,-37.33 -54.278,-37.33 -54.221,-37.33 -54.164,-37.33 -54.107,-37.33 -54.05))"], "date_created": "Thu, 13 Jan 2022 00:00:00 GMT", "description": "This data set contains radiometric dating measurements from two aquatic sediment cores excavated from two separate sites (Salisbury Plain and Gold Harbor) on South Georgia Island in February 2019. It also contains biological and geochemical sediment proxy values from both sediment cores, including total carbon (%), total nitrogen (%), number of penguin feathers and eggshell fragments, number of seal hairs, and \u03b413C and \u03b415N stable isotope values. Cores were sectioned at 1cm intervals, and radiometric dating analyses were conducted on sediment fractions \u003c850 \u00b5m by measuring for 210Pb and 226Ra (via 214Pb) by direct gamma counting using the high purity germanium planar detector in the Marine Geochemistry Laboratory at Louisiana State University (LSU). The 210Pbex profiles were used to calculate sedimentation rates using a steady state model that assumes constant rate of supply and constant sedimentation rate (Maiti et al., 2010). Geochemical analyses were performed on sediment fractions \u003c125 \u00b5m using an Elemental Analyzer-Isotope Ratio Mass Spectrometry (EA-IRMS) in the Stable Isotope Ecology Lab at LSU. Biological counts of feathers and hairs were determined by enumeration using a dissecting microscope of sediment fractions \u003e1000 \u00b5m. The data set also includes sediment core excavation site names and coordinates, date of excavation, sediment depth and age, and carbon to nitrogen isotopic ratios. Details of the data set and all relevant methods are provided in Kristan et al., 2021.", "east": -35.95, "geometry": ["POINT(-36.64 -54.335)"], "keywords": "Antarctica; Antarctic Fur Seal; Elemental Concentrations; King Penguin; Population Dynamics; South Atlantic Ocean; South Georgia Island; Stable Isotope Analysis; Sub-Antarctic", "locations": "Sub-Antarctic; South Georgia Island; South Atlantic Ocean; Antarctica", "north": -54.05, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Kristan, Allyson; Maiti, Kanchan; McMahon, Kelton; Polito, Michael", "project_titles": "Collaborative Research: Investigating Holocene Shifts in the Diets and Paleohistory of Antarctic Krill Predators", "projects": [{"proj_uid": "p0010047", "repository": "USAP-DC", "title": "Collaborative Research: Investigating Holocene Shifts in the Diets and Paleohistory of Antarctic Krill Predators"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -54.62, "title": "Radiometric dating, geochemical proxies, and predator biological remains obtained from aquatic sediment cores on South Georgia Island.", "uid": "601509", "west": -37.33}, {"awards": "1644013 Gaetani, Glenn", "bounds_geometry": ["POLYGON((164.1 -77.1,164.65 -77.1,165.2 -77.1,165.75 -77.1,166.3 -77.1,166.85 -77.1,167.4 -77.1,167.95 -77.1,168.5 -77.1,169.05 -77.1,169.6 -77.1,169.6 -77.235,169.6 -77.37,169.6 -77.505,169.6 -77.64,169.6 -77.775,169.6 -77.91,169.6 -78.045,169.6 -78.18,169.6 -78.315,169.6 -78.45,169.05 -78.45,168.5 -78.45,167.95 -78.45,167.4 -78.45,166.85 -78.45,166.3 -78.45,165.75 -78.45,165.2 -78.45,164.65 -78.45,164.1 -78.45,164.1 -78.315,164.1 -78.18,164.1 -78.045,164.1 -77.91,164.1 -77.775,164.1 -77.64,164.1 -77.505,164.1 -77.37,164.1 -77.235,164.1 -77.1))"], "date_created": "Wed, 12 Jan 2022 00:00:00 GMT", "description": "G170 Sample Locations Ross Island \u0026 Discovery Province", "east": 169.6, "geometry": ["POINT(166.85 -77.775)"], "keywords": "Antarctica; Ross Island; Sample/collection Description; Sample/Collection Description; Sample Location", "locations": "Ross Island; Antarctica", "north": -77.1, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Gaetani, Glenn", "project_titles": "Collaborative Research: Determining Magma Storage Depths and Ascent Rates for the Erebus Volcanic Province, Antarctica Using Diffusive Water Loss from Olivine-hosted Melt Inclusion", "projects": [{"proj_uid": "p0010081", "repository": "USAP-DC", "title": "Collaborative Research: Determining Magma Storage Depths and Ascent Rates for the Erebus Volcanic Province, Antarctica Using Diffusive Water Loss from Olivine-hosted Melt Inclusion"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.45, "title": "G170 Sample Locations Ross Island \u0026 Discovery Province", "uid": "601504", "west": 164.1}, {"awards": "1644013 Gaetani, Glenn", "bounds_geometry": ["POLYGON((164.1 -77.1,164.65 -77.1,165.2 -77.1,165.75 -77.1,166.3 -77.1,166.85 -77.1,167.4 -77.1,167.95 -77.1,168.5 -77.1,169.05 -77.1,169.6 -77.1,169.6 -77.235,169.6 -77.37,169.6 -77.505,169.6 -77.64,169.6 -77.775,169.6 -77.91,169.6 -78.045,169.6 -78.18,169.6 -78.315,169.6 -78.45,169.05 -78.45,168.5 -78.45,167.95 -78.45,167.4 -78.45,166.85 -78.45,166.3 -78.45,165.75 -78.45,165.2 -78.45,164.65 -78.45,164.1 -78.45,164.1 -78.315,164.1 -78.18,164.1 -78.045,164.1 -77.91,164.1 -77.775,164.1 -77.64,164.1 -77.505,164.1 -77.37,164.1 -77.235,164.1 -77.1))"], "date_created": "Wed, 12 Jan 2022 00:00:00 GMT", "description": "G170 Raman Spectroscopy \u0026 Tomography Volumes of Melt Inclusions and Vapor Bubbles", "east": 169.6, "geometry": ["POINT(166.85 -77.775)"], "keywords": "Antarctica; Chemistry:rock; Chemistry:Rock; Geochemistry; Melt Inclusions; Raman Spectroscopy; Ross Island; Vapor Bubbles; Volcanic", "locations": "Antarctica; Ross Island", "north": -77.1, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Gaetani, Glenn", "project_titles": "Collaborative Research: Determining Magma Storage Depths and Ascent Rates for the Erebus Volcanic Province, Antarctica Using Diffusive Water Loss from Olivine-hosted Melt Inclusion", "projects": [{"proj_uid": "p0010081", "repository": "USAP-DC", "title": "Collaborative Research: Determining Magma Storage Depths and Ascent Rates for the Erebus Volcanic Province, Antarctica Using Diffusive Water Loss from Olivine-hosted Melt Inclusion"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.45, "title": "G170 Raman Spectroscopy \u0026 Tomography Volumes of Melt Inclusions and Vapor Bubbles", "uid": "601508", "west": 164.1}, {"awards": "1644013 Gaetani, Glenn", "bounds_geometry": ["POLYGON((164.1 -77.1,164.65 -77.1,165.2 -77.1,165.75 -77.1,166.3 -77.1,166.85 -77.1,167.4 -77.1,167.95 -77.1,168.5 -77.1,169.05 -77.1,169.6 -77.1,169.6 -77.235,169.6 -77.37,169.6 -77.505,169.6 -77.64,169.6 -77.775,169.6 -77.91,169.6 -78.045,169.6 -78.18,169.6 -78.315,169.6 -78.45,169.05 -78.45,168.5 -78.45,167.95 -78.45,167.4 -78.45,166.85 -78.45,166.3 -78.45,165.75 -78.45,165.2 -78.45,164.65 -78.45,164.1 -78.45,164.1 -78.315,164.1 -78.18,164.1 -78.045,164.1 -77.91,164.1 -77.775,164.1 -77.64,164.1 -77.505,164.1 -77.37,164.1 -77.235,164.1 -77.1))"], "date_created": "Wed, 12 Jan 2022 00:00:00 GMT", "description": "G170 Secondary Ion Mass Spectrometry Analyses of Melt Inclusion Hydrogen Isotopes", "east": 169.6, "geometry": ["POINT(166.85 -77.775)"], "keywords": "Antarctica; Chemistry:rock; Chemistry:Rock; Geochemistry; Hydrogen; Ion Mass Spectrometry; Ross Island", "locations": "Ross Island; Antarctica", "north": -77.1, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Gaetani, Glenn", "project_titles": "Collaborative Research: Determining Magma Storage Depths and Ascent Rates for the Erebus Volcanic Province, Antarctica Using Diffusive Water Loss from Olivine-hosted Melt Inclusion", "projects": [{"proj_uid": "p0010081", "repository": "USAP-DC", "title": "Collaborative Research: Determining Magma Storage Depths and Ascent Rates for the Erebus Volcanic Province, Antarctica Using Diffusive Water Loss from Olivine-hosted Melt Inclusion"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.45, "title": "G170 Secondary Ion Mass Spectrometry Analyses of Melt Inclusion Hydrogen Isotopes", "uid": "601507", "west": 164.1}, {"awards": "1644013 Gaetani, Glenn", "bounds_geometry": ["POLYGON((164.1 -77.1,164.65 -77.1,165.2 -77.1,165.75 -77.1,166.3 -77.1,166.85 -77.1,167.4 -77.1,167.95 -77.1,168.5 -77.1,169.05 -77.1,169.6 -77.1,169.6 -77.235,169.6 -77.37,169.6 -77.505,169.6 -77.64,169.6 -77.775,169.6 -77.91,169.6 -78.045,169.6 -78.18,169.6 -78.315,169.6 -78.45,169.05 -78.45,168.5 -78.45,167.95 -78.45,167.4 -78.45,166.85 -78.45,166.3 -78.45,165.75 -78.45,165.2 -78.45,164.65 -78.45,164.1 -78.45,164.1 -78.315,164.1 -78.18,164.1 -78.045,164.1 -77.91,164.1 -77.775,164.1 -77.64,164.1 -77.505,164.1 -77.37,164.1 -77.235,164.1 -77.1))"], "date_created": "Wed, 12 Jan 2022 00:00:00 GMT", "description": "G170 Secondary Ion Mass Spectrometry Analyses of Melt Inclusion Volatiles", "east": 169.6, "geometry": ["POINT(166.85 -77.775)"], "keywords": "Antarctica; Ion Mass Spectrometry; Ross Island; Volatiles", "locations": "Ross Island; Antarctica", "north": -77.1, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Gaetani, Glenn", "project_titles": "Collaborative Research: Determining Magma Storage Depths and Ascent Rates for the Erebus Volcanic Province, Antarctica Using Diffusive Water Loss from Olivine-hosted Melt Inclusion", "projects": [{"proj_uid": "p0010081", "repository": "USAP-DC", "title": "Collaborative Research: Determining Magma Storage Depths and Ascent Rates for the Erebus Volcanic Province, Antarctica Using Diffusive Water Loss from Olivine-hosted Melt Inclusion"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.45, "title": "G170 Secondary Ion Mass Spectrometry Analyses of Melt Inclusion Volatiles", "uid": "601506", "west": 164.1}, {"awards": "1644013 Gaetani, Glenn", "bounds_geometry": ["POLYGON((164.1 -77.1,164.65 -77.1,165.2 -77.1,165.75 -77.1,166.3 -77.1,166.85 -77.1,167.4 -77.1,167.95 -77.1,168.5 -77.1,169.05 -77.1,169.6 -77.1,169.6 -77.235,169.6 -77.37,169.6 -77.505,169.6 -77.64,169.6 -77.775,169.6 -77.91,169.6 -78.045,169.6 -78.18,169.6 -78.315,169.6 -78.45,169.05 -78.45,168.5 -78.45,167.95 -78.45,167.4 -78.45,166.85 -78.45,166.3 -78.45,165.75 -78.45,165.2 -78.45,164.65 -78.45,164.1 -78.45,164.1 -78.315,164.1 -78.18,164.1 -78.045,164.1 -77.91,164.1 -77.775,164.1 -77.64,164.1 -77.505,164.1 -77.37,164.1 -77.235,164.1 -77.1))"], "date_created": "Wed, 12 Jan 2022 00:00:00 GMT", "description": "Electron Microprobe Analyses of Melt Inclusions and Host Olivines", "east": 169.6, "geometry": ["POINT(166.85 -77.775)"], "keywords": "Antarctica; Chemistry:rock; Chemistry:Rock; Electron Microprobe Analyses; Olivine; Petrography; Ross Island", "locations": "Antarctica; Ross Island", "north": -77.1, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Gaetani, Glenn", "project_titles": "Collaborative Research: Determining Magma Storage Depths and Ascent Rates for the Erebus Volcanic Province, Antarctica Using Diffusive Water Loss from Olivine-hosted Melt Inclusion", "projects": [{"proj_uid": "p0010081", "repository": "USAP-DC", "title": "Collaborative Research: Determining Magma Storage Depths and Ascent Rates for the Erebus Volcanic Province, Antarctica Using Diffusive Water Loss from Olivine-hosted Melt Inclusion"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.45, "title": "G170 Electron Microprobe Analyses of Melt Inclusions and Host Olivines", "uid": "601505", "west": 164.1}, {"awards": "1643353 Christianson, Knut; 1744649 Christianson, Knut", "bounds_geometry": ["POLYGON((-179.9989061 -89.752739299,-143.999017884 -89.752739299,-107.999129669 -89.752739299,-71.9992414529 -89.752739299,-35.9993532372 -89.752739299,0.000534978500013 -89.752739299,36.0004231942 -89.752739299,72.0003114099 -89.752739299,108.000199626 -89.752739299,144.000087841 -89.752739299,179.999976057 -89.752739299,179.999976057 -89.7772743702,179.999976057 -89.8018094414,179.999976057 -89.8263445126,179.999976057 -89.8508795838,179.999976057 -89.875414655,179.999976057 -89.8999497262,179.999976057 -89.9244847974,179.999976057 -89.9490198686,179.999976057 -89.9735549398,179.999976057 -89.998090011,144.000087841 -89.998090011,108.000199626 -89.998090011,72.0003114099 -89.998090011,36.0004231942 -89.998090011,0.000534978499985 -89.998090011,-35.9993532372 -89.998090011,-71.9992414529 -89.998090011,-107.999129669 -89.998090011,-143.999017884 -89.998090011,-179.9989061 -89.998090011,-179.9989061 -89.9735549398,-179.9989061 -89.9490198686,-179.9989061 -89.9244847974,-179.9989061 -89.8999497262,-179.9989061 -89.875414655,-179.9989061 -89.8508795838,-179.9989061 -89.8263445126,-179.9989061 -89.8018094414,-179.9989061 -89.7772743702,-179.9989061 -89.752739299))"], "date_created": "Thu, 06 Jan 2022 00:00:00 GMT", "description": "These are ground-based radar data collected from a subglacial lake ~15 km from the geographic South Pole. Data were collected with the Autonomous phase-sensitive Radio Echo Sounder (ApRES) (Nicholls et al., 2015). The intention of this dataset is to be used for vertical velocity structure and interpretation.", "east": 179.999976057, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Apres; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; South Pole; Subglacial Lakes; Vertical Velocity", "locations": "South Pole; South Pole; Antarctica", "north": -89.752739299, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Hills, Benjamin", "project_titles": "Collaborative Research: Computational Methods Supporting Joint Seismic and Radar Inversion for Ice Fabric and Temperature in Streaming Flow", "projects": [{"proj_uid": "p0010160", "repository": "USAP-DC", "title": "Collaborative Research: Computational Methods Supporting Joint Seismic and Radar Inversion for Ice Fabric and Temperature in Streaming Flow"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -89.998090011, "title": "South Pole Lake ApRES Radar", "uid": "601503", "west": -179.9989061}, {"awards": "1744649 Christianson, Knut; 1643353 Christianson, Knut", "bounds_geometry": ["POLYGON((-179.9989061 -89.752739299,-143.999017884 -89.752739299,-107.999129669 -89.752739299,-71.9992414529 -89.752739299,-35.9993532372 -89.752739299,0.000534978500013 -89.752739299,36.0004231942 -89.752739299,72.0003114099 -89.752739299,108.000199626 -89.752739299,144.000087841 -89.752739299,179.999976057 -89.752739299,179.999976057 -89.7772743702,179.999976057 -89.8018094414,179.999976057 -89.8263445126,179.999976057 -89.8508795838,179.999976057 -89.875414655,179.999976057 -89.8999497262,179.999976057 -89.9244847974,179.999976057 -89.9490198686,179.999976057 -89.9735549398,179.999976057 -89.998090011,144.000087841 -89.998090011,108.000199626 -89.998090011,72.0003114099 -89.998090011,36.0004231942 -89.998090011,0.000534978499985 -89.998090011,-35.9993532372 -89.998090011,-71.9992414529 -89.998090011,-107.999129669 -89.998090011,-143.999017884 -89.998090011,-179.9989061 -89.998090011,-179.9989061 -89.9735549398,-179.9989061 -89.9490198686,-179.9989061 -89.9244847974,-179.9989061 -89.8999497262,-179.9989061 -89.875414655,-179.9989061 -89.8508795838,-179.9989061 -89.8263445126,-179.9989061 -89.8018094414,-179.9989061 -89.7772743702,-179.9989061 -89.752739299))"], "date_created": "Thu, 06 Jan 2022 00:00:00 GMT", "description": "These are ground-based GNSS data collected from a subglacial lake ~15 km from the geographic South Pole.\r\nData were collected with two separate antenna/receiver systems: 1) Septentrio Altus APS3G antenna/receiver 2) Trimble NetR8 and Trimble Zephyr Geodetic antenna.", "east": 179.999976057, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GNSS; GPS; GPS Data; South Pole; Subglacial Lakes", "locations": "South Pole; Antarctica; South Pole", "north": -89.752739299, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Hills, Benjamin", "project_titles": "Collaborative Research: Computational Methods Supporting Joint Seismic and Radar Inversion for Ice Fabric and Temperature in Streaming Flow", "projects": [{"proj_uid": "p0010160", "repository": "USAP-DC", "title": "Collaborative Research: Computational Methods Supporting Joint Seismic and Radar Inversion for Ice Fabric and Temperature in Streaming Flow"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -89.998090011, "title": "South Pole Lake GNSS", "uid": "601502", "west": -179.9989061}, {"awards": "1947040 Postlethwait, John", "bounds_geometry": ["POLYGON((-63.1 -63.9,-63.02 -63.9,-62.94 -63.9,-62.86 -63.9,-62.78 -63.9,-62.7 -63.9,-62.62 -63.9,-62.54 -63.9,-62.46 -63.9,-62.38 -63.9,-62.3 -63.9,-62.3 -64.01,-62.3 -64.12,-62.3 -64.23,-62.3 -64.34,-62.3 -64.45,-62.3 -64.56,-62.3 -64.67,-62.3 -64.78,-62.3 -64.89,-62.3 -65,-62.38 -65,-62.46 -65,-62.54 -65,-62.62 -65,-62.7 -65,-62.78 -65,-62.86 -65,-62.94 -65,-63.02 -65,-63.1 -65,-63.1 -64.89,-63.1 -64.78,-63.1 -64.67,-63.1 -64.56,-63.1 -64.45,-63.1 -64.34,-63.1 -64.23,-63.1 -64.12,-63.1 -64.01,-63.1 -63.9))"], "date_created": "Tue, 04 Jan 2022 00:00:00 GMT", "description": "Nucleic acid sequences, sequence alignments, model selection results, and phylogenetic trees from the phylogenetic placement of Notoxcellia species. ", "east": -62.3, "geometry": ["POINT(-62.7 -64.45)"], "keywords": "Alveolata; Antarctica; Antarctic Peninsula; Biota; Notoxcellia Coronata; Notoxcellia Picta; Oceans; Perkinsozoa; Xcellidae", "locations": "Antarctic Peninsula; Antarctica", "north": -63.9, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Desvignes, Thomas; Varsani, Arvind; Postlethwait, John", "project_titles": "EAGER: Origin and Physiological Consequences of a Neoplasm Outbreak in Antarctic Fish ", "projects": [{"proj_uid": "p0010221", "repository": "USAP-DC", "title": "EAGER: Origin and Physiological Consequences of a Neoplasm Outbreak in Antarctic Fish "}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.0, "title": "Phylogenetic Analysis of Notoxcellia species.", "uid": "601501", "west": -63.1}, {"awards": "1929991 Pettit, Erin C", "bounds_geometry": ["POLYGON((-108 -74.5,-107.6 -74.5,-107.2 -74.5,-106.8 -74.5,-106.4 -74.5,-106 -74.5,-105.6 -74.5,-105.2 -74.5,-104.8 -74.5,-104.4 -74.5,-104 -74.5,-104 -74.6,-104 -74.7,-104 -74.8,-104 -74.9,-104 -75,-104 -75.1,-104 -75.2,-104 -75.3,-104 -75.4,-104 -75.5,-104.4 -75.5,-104.8 -75.5,-105.2 -75.5,-105.6 -75.5,-106 -75.5,-106.4 -75.5,-106.8 -75.5,-107.2 -75.5,-107.6 -75.5,-108 -75.5,-108 -75.4,-108 -75.3,-108 -75.2,-108 -75.1,-108 -75,-108 -74.9,-108 -74.8,-108 -74.7,-108 -74.6,-108 -74.5))"], "date_created": "Thu, 23 Dec 2021 00:00:00 GMT", "description": "This data set includes two grounding-line products of Thwaites Glacier and a series of offshore pinning points for 2014 and 2019/20. The grounding lines where delineated manually from height above flotation calculations using the bathymetry model from Jordan et al. (2020), the REMA digital surface elevation model (Howat et al., 2019) for the 2014 product and ICESat-2 surface altimetry data (Smith et al., 2019) for the 2019/20 product. More details about the processing, corrections and uncertainties can be found in our publication. We would appreciate if users who think the grounding-line products are useful for your own research would cite our manuscript.", "east": -104.0, "geometry": ["POINT(-106 -75)"], "keywords": "Amundsen Sea; Antarctica; Glaciology; Grounding Line; Ice Shelf; Thwaites Glacier", "locations": "Thwaites Glacier; Amundsen Sea; Antarctica; Antarctica; Thwaites Glacier", "north": -74.5, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Wild, Christian; Alley, Karen; Muto, Atsu; Truffer, Martin; Scambos, Ted; Pettit, Erin", "project_titles": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment", "projects": [{"proj_uid": "p0010162", "repository": "USAP-DC", "title": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -75.5, "title": "Thwaites Glacier grounding lines for 2014 and 2019/20 from height above flotation", "uid": "601499", "west": -108.0}, {"awards": "1543453 Lyons, W. Berry", "bounds_geometry": ["POINT(-149.50134 -84.640287)"], "date_created": "Thu, 23 Dec 2021 00:00:00 GMT", "description": "This dataset includes the following measurements from Niskin casts at Mercer Subglacial Lake as part of the SALSA project: noble gases and their isotopes, d13C-DIC, Ge, 87Sr/86Sr, and 234U/238U", "east": -149.50134, "geometry": ["POINT(-149.50134 -84.640287)"], "keywords": "Antarctica; Mercer Subglacial Lake; Noble Gas", "locations": "Mercer Subglacial Lake; Antarctica", "north": -84.640287, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Gardner, Christopher B.; Lyons, W. Berry", "project_titles": "Collaborative Research: Subglacial Antarctic Lakes Scientific Access (SALSA): Integrated Study of Carbon Cycling in Hydrologically-active Subglacial Environments", "projects": [{"proj_uid": "p0010119", "repository": "USAP-DC", "title": "Collaborative Research: Subglacial Antarctic Lakes Scientific Access (SALSA): Integrated Study of Carbon Cycling in Hydrologically-active Subglacial Environments"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -84.640287, "title": "Mercer Subglacial Lake (SLM) noble gas and isotopic data", "uid": "601498", "west": -149.50134}, {"awards": "1245871 McCarthy, Christine", "bounds_geometry": null, "date_created": "Thu, 23 Dec 2021 00:00:00 GMT", "description": "This data set contains text files for the experimental logs of ice-on-rock friction experiments that were conducted in a double direct shear apparatus at temperatures of -16.4 C to -2 C. There are eleven files (C28-C34, C39-C41, and C44). Each file contains 4 columns of data that correspond to time (s), vertical displacement (microns), friction, and velocity. The data were prepared by converting voltages from experimental feedbacks, to appropriate units using calibrations, as conducted separate. Miscellaneous loading and unloading data were removed and the data was filtered modestly (100 point moving average filter in matlab). The data set includes all information needed to plot friction or velocity vs. time or displacement from the beginning to end of the run. ", "east": null, "geometry": null, "keywords": "Antarctica", "locations": "Antarctica", "north": null, "nsf_funding_programs": "Antarctic Glaciology", "persons": "McCarthy, Christine M.; Skarbek, Rob; Savage, Heather", "project_titles": "Laboratory Study of Ice Deformation under Tidal Loading Conditions with Application to Antarctic Glaciers", "projects": [{"proj_uid": "p0010186", "repository": "USAP-DC", "title": "Laboratory Study of Ice Deformation under Tidal Loading Conditions with Application to Antarctic Glaciers"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Dataset for Tidal modulation of ice streams: Effect of periodic sliding velocity on ice friction and healing", "uid": "601497", "west": null}, {"awards": "1947040 Postlethwait, John", "bounds_geometry": ["POLYGON((-62.9 -64.7,-62.84 -64.7,-62.78 -64.7,-62.72 -64.7,-62.66 -64.7,-62.6 -64.7,-62.54 -64.7,-62.48 -64.7,-62.42 -64.7,-62.36 -64.7,-62.3 -64.7,-62.3 -64.73,-62.3 -64.76,-62.3 -64.79,-62.3 -64.82,-62.3 -64.85,-62.3 -64.88,-62.3 -64.91,-62.3 -64.94,-62.3 -64.97,-62.3 -65,-62.36 -65,-62.42 -65,-62.48 -65,-62.54 -65,-62.6 -65,-62.66 -65,-62.72 -65,-62.78 -65,-62.84 -65,-62.9 -65,-62.9 -64.97,-62.9 -64.94,-62.9 -64.91,-62.9 -64.88,-62.9 -64.85,-62.9 -64.82,-62.9 -64.79,-62.9 -64.76,-62.9 -64.73,-62.9 -64.7))"], "date_created": "Thu, 16 Dec 2021 00:00:00 GMT", "description": "Pictures of Trematomus scotti specimens displaying visible X-cell infections. Images for the left and right sides of the fish are provided for each specimen, along with an image for each side showing the grid-point categorization as 1) healthy skin, 2) moderately affected skin, and 3) severely affected skin, and associated ImageJ ROI and count files.", "east": -62.3, "geometry": ["POINT(-62.6 -64.85)"], "keywords": "Andvord Bay; Antarctica; Fish", "locations": "Antarctica; Andvord Bay", "north": -64.7, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Lauridsen, Henrik; Postlethwait, John; Desvignes, Thomas", "project_titles": "EAGER: Origin and Physiological Consequences of a Neoplasm Outbreak in Antarctic Fish ", "projects": [{"proj_uid": "p0010221", "repository": "USAP-DC", "title": "EAGER: Origin and Physiological Consequences of a Neoplasm Outbreak in Antarctic Fish "}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.0, "title": "Fish pictures and skin pathology of X-cell infection in Trematomus scotti.", "uid": "601496", "west": -62.9}, {"awards": "1947040 Postlethwait, John", "bounds_geometry": ["POLYGON((-65.3 -63.3,-65 -63.3,-64.7 -63.3,-64.4 -63.3,-64.1 -63.3,-63.8 -63.3,-63.5 -63.3,-63.2 -63.3,-62.9 -63.3,-62.6 -63.3,-62.3 -63.3,-62.3 -63.47,-62.3 -63.64,-62.3 -63.81,-62.3 -63.98,-62.3 -64.15,-62.3 -64.32,-62.3 -64.49,-62.3 -64.66,-62.3 -64.83,-62.3 -65,-62.6 -65,-62.9 -65,-63.2 -65,-63.5 -65,-63.8 -65,-64.1 -65,-64.4 -65,-64.7 -65,-65 -65,-65.3 -65,-65.3 -64.83,-65.3 -64.66,-65.3 -64.49,-65.3 -64.32,-65.3 -64.15,-65.3 -63.98,-65.3 -63.81,-65.3 -63.64,-65.3 -63.47,-65.3 -63.3))"], "date_created": "Thu, 16 Dec 2021 00:00:00 GMT", "description": "Temperature profiles at five fishing locations on the West Antarctic Peninsula during austral fall 2018. All profiles were recorded using a DST centi-TD Miniature Temperature and Depth Data Logger (Star-Oddi, Gar\u00f0ab\u00e6r, Iceland) mounted on one of the two otters of the fishing net, thus continuously recording temperature while going down, at the bottom, and while ascending the water column. The two temperature profiles in the Gerlache Strait were recorded using XBT probes (Expendable Bathythermograph) Sippican Deep Blue 760-M and thus show unidirectional temperature profiles.", "east": -62.3, "geometry": ["POINT(-63.8 -64.15)"], "keywords": "Antarctica; Antarctic Peninsula", "locations": "Antarctic Peninsula; Antarctica", "north": -63.3, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Desvignes, Thomas", "project_titles": "EAGER: Origin and Physiological Consequences of a Neoplasm Outbreak in Antarctic Fish ", "projects": [{"proj_uid": "p0010221", "repository": "USAP-DC", "title": "EAGER: Origin and Physiological Consequences of a Neoplasm Outbreak in Antarctic Fish "}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.0, "title": "Temperature profiles at five fishing locations on the West Antarctic Peninsula during austral fall 2018.", "uid": "601495", "west": -65.3}, {"awards": "1947040 Postlethwait, John", "bounds_geometry": ["POLYGON((-62.9 -64.7,-62.84 -64.7,-62.78 -64.7,-62.72 -64.7,-62.66 -64.7,-62.6 -64.7,-62.54 -64.7,-62.48 -64.7,-62.42 -64.7,-62.36 -64.7,-62.3 -64.7,-62.3 -64.73,-62.3 -64.76,-62.3 -64.79,-62.3 -64.82,-62.3 -64.85,-62.3 -64.88,-62.3 -64.91,-62.3 -64.94,-62.3 -64.97,-62.3 -65,-62.36 -65,-62.42 -65,-62.48 -65,-62.54 -65,-62.6 -65,-62.66 -65,-62.72 -65,-62.78 -65,-62.84 -65,-62.9 -65,-62.9 -64.97,-62.9 -64.94,-62.9 -64.91,-62.9 -64.88,-62.9 -64.85,-62.9 -64.82,-62.9 -64.79,-62.9 -64.76,-62.9 -64.73,-62.9 -64.7))"], "date_created": "Thu, 16 Dec 2021 00:00:00 GMT", "description": "Excel file containing specimen field identifications, capture location, presence or absence of visible tumors, weight (g), standard length (cm), sex, and the percentage of skin visually affected by X-cells, moderately affected, and severely affected by X-cells.", "east": -62.3, "geometry": ["POINT(-62.6 -64.85)"], "keywords": "Andvord Bay; Antarctica; Fish", "locations": "Andvord Bay; Antarctica", "north": -64.7, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Postlethwait, John; Desvignes, Thomas; Lauridsen, Henrik; Le Francois, Nathalie", "project_titles": "EAGER: Origin and Physiological Consequences of a Neoplasm Outbreak in Antarctic Fish ", "projects": [{"proj_uid": "p0010221", "repository": "USAP-DC", "title": "EAGER: Origin and Physiological Consequences of a Neoplasm Outbreak in Antarctic Fish "}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.0, "title": "Morphological and pathological data of Trematomus scotti specimens captured on May 30th, 2018 in Andvord Bay.", "uid": "601494", "west": -62.9}, {"awards": "1443522 Wannamaker, Philip", "bounds_geometry": ["POLYGON((166 -77.15,166.34 -77.15,166.68 -77.15,167.02 -77.15,167.36 -77.15,167.7 -77.15,168.04 -77.15,168.38 -77.15,168.72 -77.15,169.06 -77.15,169.4 -77.15,169.4 -77.225,169.4 -77.3,169.4 -77.375,169.4 -77.45,169.4 -77.525,169.4 -77.6,169.4 -77.675,169.4 -77.75,169.4 -77.825,169.4 -77.9,169.06 -77.9,168.72 -77.9,168.38 -77.9,168.04 -77.9,167.7 -77.9,167.36 -77.9,167.02 -77.9,166.68 -77.9,166.34 -77.9,166 -77.9,166 -77.825,166 -77.75,166 -77.675,166 -77.6,166 -77.525,166 -77.45,166 -77.375,166 -77.3,166 -77.225,166 -77.15))"], "date_created": "Tue, 14 Dec 2021 00:00:00 GMT", "description": "Submitted zip file contains the tensor impedance and tipper responses from magnetotelluric (MT) surveying at 130 sites over Erebus volcano and Ross Island from 2014-2017. The individual site responses are provided in edi format, which is the self-explained global standard for MT response archiving and distribution. The X coordinate axis for all sites is Grid North.", "east": 169.4, "geometry": ["POINT(167.7 -77.525)"], "keywords": "Antarctica; Mantle Melting; Mount Erebus", "locations": "Mount Erebus; Antarctica", "north": -77.15, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Wannamaker, Philip; Hill, Graham", "project_titles": "Magma Sources, Residence and Pathways of Mount Erebus Phonolitic Volcano, Antarctica, from Magnetotelluric Resistivity Structure", "projects": [{"proj_uid": "p0010444", "repository": "USAP-DC", "title": "Magma Sources, Residence and Pathways of Mount Erebus Phonolitic Volcano, Antarctica, from Magnetotelluric Resistivity Structure"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.9, "title": "Erebus volcano/Ross Island Magnetotelluric (MT) data", "uid": "601493", "west": 166.0}, {"awards": "2037561 Jenouvrier, Stephanie; 1744794 Jenouvrier, Stephanie", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Wed, 08 Dec 2021 00:00:00 GMT", "description": "Climate impacts are not always easily discerned in wild populations as detecting climate change signals in populations is challenged by stochastic noise associated with natural climate variability, variability in biotic and abiotic processes, and observation error in demographic rates. Detection of the impact of climate change on populations requires making a formal distinction between signals in the population associated with long-term climate trends from those generated by stochastic noise. The time of emergence (ToE) identifies when the signal of anthropogenic climate change can be quantitatively distinguished from natural climate variability. This concept has been applied extensively in the climate sciences, but has not been explored in the context of population dynamics. \r\n\r\nIn Jenouvrier et al. (Global Change Biology, accepted), we outline an approach to detecting climate-driven signals in populations based on an assessment of when climate change drives population dynamics beyond the envelope characteristic of stochastic variations in an unperturbed state. \r\n\r\nThis data set is the code of a theoretical assessment of the time of emergence of climate-driven signals in population dynamics. We identify the dependence of time of emergence in populations on the magnitude of both trends and variability in climate and also explore the effect of intrinsic demographic controls on the time of emergence in population. We demonstrate that different life histories (fast species vs. slow species), demographic processes (survival, reproduction) and the relationships between climate and demographic rates, yield population dynamics that filter climate trends and variability differently. \r\n\r\nIn Jenouvrier et al. (accepted), we also illustrate empirically how to detect the point in time when anthropogenic signals in populations emerge from stochastic noise for a species threatened by climate change: the emperor penguin. This data set also includes a detailed Table and code to analyze those results.\r\n", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica", "locations": "Antarctica; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences; Antarctic Organisms and Ecosystems", "persons": "Jenouvrier, Stephanie", "project_titles": "A Multi-scale Approach to Understanding Spatial and Population Variability in Emperor Penguins; Integrating Antarctic Environmental and Biological Predictability to Obtain Optimal Forecasts", "projects": [{"proj_uid": "p0010282", "repository": "USAP-DC", "title": "Integrating Antarctic Environmental and Biological Predictability to Obtain Optimal Forecasts"}, {"proj_uid": "p0010447", "repository": "USAP-DC", "title": "A Multi-scale Approach to Understanding Spatial and Population Variability in Emperor Penguins"}, {"proj_uid": "p0010229", "repository": "USAP-DC", "title": "A Multi-scale Approach to Understanding Spatial and Population Variability in Emperor Penguins"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Detecting climate signals in populations: case of emperor penguin", "uid": "601491", "west": -180.0}, {"awards": "1744949 Campbell, Seth", "bounds_geometry": ["POLYGON((-127.5 -77,-127.4 -77,-127.3 -77,-127.2 -77,-127.1 -77,-127 -77,-126.9 -77,-126.8 -77,-126.7 -77,-126.6 -77,-126.5 -77,-126.5 -77.04,-126.5 -77.08,-126.5 -77.12,-126.5 -77.16,-126.5 -77.2,-126.5 -77.24,-126.5 -77.28,-126.5 -77.32,-126.5 -77.36,-126.5 -77.4,-126.6 -77.4,-126.7 -77.4,-126.8 -77.4,-126.9 -77.4,-127 -77.4,-127.1 -77.4,-127.2 -77.4,-127.3 -77.4,-127.4 -77.4,-127.5 -77.4,-127.5 -77.36,-127.5 -77.32,-127.5 -77.28,-127.5 -77.24,-127.5 -77.2,-127.5 -77.16,-127.5 -77.12,-127.5 -77.08,-127.5 -77.04,-127.5 -77))"], "date_created": "Wed, 08 Dec 2021 00:00:00 GMT", "description": "Here we deposited data sets from the 2018-2019 Mt. Waesche field season. Included are 5 MHz, 10 MHz, 100 MHz, and 350 MHz. Datasets are provided in SEG-Y format for the 100 and 350 MHz and H5 files for the 5 and 10 MHz.", "east": -126.5, "geometry": ["POINT(-127 -77.2)"], "keywords": "Antarctica; GPR; Mt. Waesche", "locations": "Mt. Waesche; Antarctica", "north": -77.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Braddock, Scott", "project_titles": "Collaborative Research: Constraining West Antarctic Ice Sheet elevation during the last interglacial", "projects": [{"proj_uid": "p0010272", "repository": "USAP-DC", "title": "Collaborative Research: Constraining West Antarctic Ice Sheet elevation during the last interglacial"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.4, "title": "Mt. Waesche ground-penetrating radar data 2018-2019", "uid": "601490", "west": -127.5}, {"awards": "1921418 Yan, Stephen", "bounds_geometry": ["POLYGON((35 76,35.1 76,35.2 76,35.3 76,35.4 76,35.5 76,35.6 76,35.7 76,35.8 76,35.9 76,36 76,36 75.9,36 75.8,36 75.7,36 75.6,36 75.5,36 75.4,36 75.3,36 75.2,36 75.1,36 75,35.9 75,35.8 75,35.7 75,35.6 75,35.5 75,35.4 75,35.3 75,35.2 75,35.1 75,35 75,35 75.1,35 75.2,35 75.3,35 75.4,35 75.5,35 75.6,35 75.7,35 75.8,35 75.9,35 76))"], "date_created": "Wed, 08 Dec 2021 00:00:00 GMT", "description": "This dataset includes a preliminary 1-km line of L-band radar data near the East Greenland Ice core Project. The data have been pulse compressed and focused using a simple Doppler focusing algorithm.", "east": 36.0, "geometry": ["POINT(35.5 75.5)"], "keywords": "Antarctica; Greenland", "locations": "Greenland; Antarctica", "north": 76.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Taylor, Drew; Gogineni, Prasad; O\u0027Neill, Charles; Taylor, Ryan", "project_titles": "EAGER: L-Band Radar Ice Sounder for Measuring Ice Basal Conditions and Ice-Shelf Melt Rate", "projects": [{"proj_uid": "p0010271", "repository": "USAP-DC", "title": "EAGER: L-Band Radar Ice Sounder for Measuring Ice Basal Conditions and Ice-Shelf Melt Rate"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": 75.0, "title": "2019 initial L-band radar data for EGRIP", "uid": "601488", "west": 35.0}, {"awards": "1921418 Yan, Stephen", "bounds_geometry": ["POLYGON((123 -75,123.1 -75,123.2 -75,123.3 -75,123.4 -75,123.5 -75,123.6 -75,123.7 -75,123.8 -75,123.9 -75,124 -75,124 -75.1,124 -75.2,124 -75.3,124 -75.4,124 -75.5,124 -75.6,124 -75.7,124 -75.8,124 -75.9,124 -76,123.9 -76,123.8 -76,123.7 -76,123.6 -76,123.5 -76,123.4 -76,123.3 -76,123.2 -76,123.1 -76,123 -76,123 -75.9,123 -75.8,123 -75.7,123 -75.6,123 -75.5,123 -75.4,123 -75.3,123 -75.2,123 -75.1,123 -75))"], "date_created": "Sat, 04 Dec 2021 00:00:00 GMT", "description": "This dataset includes a preliminary set of L-band radar data obtained near Dome Concordia runway. The data consist of stationary profiles that have been pulse compressed and focused using coherent integration.", "east": 124.0, "geometry": ["POINT(123.5 -75.5)"], "keywords": "Antarctica", "locations": "Antarctica; Antarctica", "north": -75.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Taylor, Drew; Gogineni, Prasad; O\u0027Neill, Charles; Taylor, Ryan", "project_titles": "EAGER: L-Band Radar Ice Sounder for Measuring Ice Basal Conditions and Ice-Shelf Melt Rate", "projects": [{"proj_uid": "p0010271", "repository": "USAP-DC", "title": "EAGER: L-Band Radar Ice Sounder for Measuring Ice Basal Conditions and Ice-Shelf Melt Rate"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -76.0, "title": "2019 initial L-band radar data for Dome Concordia", "uid": "601489", "west": 123.0}, {"awards": "1643550 Sletten, Ronald", "bounds_geometry": ["POLYGON((161.17 -77.55,161.178 -77.55,161.186 -77.55,161.194 -77.55,161.202 -77.55,161.21 -77.55,161.218 -77.55,161.226 -77.55,161.234 -77.55,161.242 -77.55,161.25 -77.55,161.25 -77.553,161.25 -77.556,161.25 -77.559,161.25 -77.562,161.25 -77.565,161.25 -77.568,161.25 -77.571,161.25 -77.574,161.25 -77.577,161.25 -77.58,161.242 -77.58,161.234 -77.58,161.226 -77.58,161.218 -77.58,161.21 -77.58,161.202 -77.58,161.194 -77.58,161.186 -77.58,161.178 -77.58,161.17 -77.58,161.17 -77.577,161.17 -77.574,161.17 -77.571,161.17 -77.568,161.17 -77.565,161.17 -77.562,161.17 -77.559,161.17 -77.556,161.17 -77.553,161.17 -77.55))"], "date_created": "Mon, 15 Nov 2021 00:00:00 GMT", "description": "Timelapse photography of Don Juan Pond basin during the period from 12/25/2017 to 1/17/2018. The images show the daily water level changes of Don Juan pond as well as the change in the appearance of slope streaks in the surrounding basin walls.", "east": 161.25, "geometry": ["POINT(161.21 -77.565)"], "keywords": "Antarctica; Brine; CaCl2; Don Juan Pond; Dry Valleys; Salt", "locations": "Don Juan Pond; Dry Valleys; Antarctica", "north": -77.55, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Sletten, Ronald S.; Mushkin, Amit; Toner, Jonathan", "project_titles": "Formation and Characteristics of Brine-rich Water in the Dry Valleys, Antarctica", "projects": [{"proj_uid": "p0010069", "repository": "USAP-DC", "title": "Formation and Characteristics of Brine-rich Water in the Dry Valleys, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.58, "title": "Timelapse photography of Don Juan Pond and surrounding basin", "uid": "601487", "west": 161.17}, {"awards": "0732625 Leventer, Amy; 1433140 Domack, Eugene", "bounds_geometry": ["POLYGON((-69 -58,-67.7 -58,-66.4 -58,-65.1 -58,-63.8 -58,-62.5 -58,-61.2 -58,-59.9 -58,-58.6 -58,-57.3 -58,-56 -58,-56 -59,-56 -60,-56 -61,-56 -62,-56 -63,-56 -64,-56 -65,-56 -66,-56 -67,-56 -68,-57.3 -68,-58.6 -68,-59.9 -68,-61.2 -68,-62.5 -68,-63.8 -68,-65.1 -68,-66.4 -68,-67.7 -68,-69 -68,-69 -67,-69 -66,-69 -65,-69 -64,-69 -63,-69 -62,-69 -61,-69 -60,-69 -59,-69 -58))"], "date_created": "Mon, 15 Nov 2021 00:00:00 GMT", "description": "This data set contains an age vs depth model and measurements of magnetic susceptibility, benthic foraminifera Bulimina aculeata d18O and d13C, bulk sediment GDGT data, and diatom assemblage data from USAP LMG13-11 JKC-1 sediment core (0-100 cm) archived at the Oregon State University ACC repository. All stable isotope and GDGT measurements were made at the University of South Florida College of Marine Science. Diatom assemblages were counted at Colgate University. The data set includes all replicate measurements. Details of the entire data set and all relevant methods are provided in Browne et al (submitted, 2021)", "east": -56.0, "geometry": ["POINT(-62.5 -63)"], "keywords": "Antarctica; Antarctic Peninsula; Delta 13C; Delta 18O; Paleoceanography; Temperature", "locations": "Antarctica; Antarctic Peninsula", "north": -58.0, "nsf_funding_programs": "Antarctic Integrated System Science; Antarctic Integrated System Science", "persons": "Shevenell, Amelia", "project_titles": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans", "projects": [{"proj_uid": "p0000101", "repository": "USAP-DC", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "LARISSA", "south": -68.0, "title": "LMG13-11 JKC-1 Paleoceanographic data", "uid": "601485", "west": -69.0}, {"awards": "1246353 Anderson, John; 1745055 Stearns, Leigh; 1745043 Simkins, Lauren", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Wed, 10 Nov 2021 00:00:00 GMT", "description": "The dataset here allows exploration of the causes and significance of Antarctic grounding-line sinuosity by coupling observations of contemporary Antarctic grounding lines and paleo-grounding lines expressed as ice-marginal landforms on the Ross Sea continental shelf. Modern grounding lines are derived from the MEaSUREs Version 2 Differential Satellite Radar Interferometry dataset with spatial resolutions of 25-120 m spanning February 1992 to December 2014 (Rignot et al., 2016; Mouginot et al., 2017). The boundaries of individual grounding lines representative of individual glacial catchments (n=664) were delineated by the inflection points of the shear strain rate, \u03b5xy (c.f Van der Veen et al., 2011). Sinuosity was calculated as the ratio of the true length, orthogonal to ice-flow direction, of the grounding lines and the straight line length between end-points and in units of km/km. Raster data were extracted at 1-km points along each grounding line; the mean was calculated for each grounding line and merged in a table with sinuosity data. A dataset of 6,275 paleo-grounding lines expressed as ice-marginal landforms on the deglaciated western Ross Sea continental shelf are used in this study, originally published by Simkins et al., 2018. The ice-marginal landforms were mapped from multibeam echo sounder data that was collected onboard the RVIB Nathaniel B. Palmer (NBP) 15-02 cruise using a Kongsberg EM122 operating in dual swath mode at 12 kHz frequency with 30-60% swath overlap (Cruise DOI: 10.7284/901477). The resulting bathymetry data was gridded at 20-40 m with decimeter vertical elevation resolution depending on water depth and sea-state. Sinuosity is calculated as a ratio of true (mapped) landform length, measured in the across paleo-ice flow direction at the crest of the landform, to the straight line distance between the mapped landform endpoints and in units of km/km. \r\n\r\nTo compare modern and paleo-grounding lines, we use a consistent length scale by segmenting the grounding lines into 2-km sections for the two datasets (modern, n=12,966; paleo, n=5,832), even though this eliminates grounding lines that are less than 2-km long and thus results in 1 modern and 3,873 paleo-grounding lines removed. The full-length and 2-km segmented groundings lines are provided as shapefiles \"InSAR_groundinglines_full\" and \"InSAR_groundinglines_2km\", the paleo-grounding lines are provided as shapefiles \"RossSea_icemarginal_full\" and \"RossSea_icemarginal_2km\", and points marking modern grounding lines retreat from repeat InSAR surveys are provided as shapefile \"InSAR_retreat_points\", all stored together in a geodatabase named \"Antarctic_groundinglines.gbd\". Additional grounding line metrics, including length, sinuosity, bed roughness, and bed slope for modern and paleo-grounding lines, and height-above-buoyancy gradient, ice-flow velocity, presence of pinning points and ice shelves are provided for modern grounding lines. \r\n\r\nThe published dataset was compiled and analyzed in the article \"Controls on circum-Antarctic grounding-line sinuosity \" by Simkins, L.M., Stearns, L.A., and Riverman, K.L, which will be submitted to a peer-review journal in November 2021.\r\n\r\nReferences\r\nMouginot, J., B. Scheuchl, and E. Rignot. 2017. MEaSUREs Antarctic Boundaries for IPY 2007-2009 from Satellite Radar, Version 2. [Indicate subset used]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. \r\n\r\nRignot, E., J. Mouginot, and B. Scheuchl. 2016. MEaSUREs Antarctic Grounding Line from Differential Satellite Radar Interferometry, Version 2. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. \r\n\r\nSimkins, L. M., Greenwood, S. L., \u0026 Anderson, J. B. (2018). Diagnosing ice sheet grounding line stability from landform morphology. The Cryosphere, 12(8), 2707-2726.\r\n\r\nVan der Veen, C. J., J. C. Plummer, \u0026 L. A. Stearns. (2011). Controls on the recent speed up of Jakobshavn Isbr\u00e6, West Greenland. Journal of Glaciology, 57(204), 770-782", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Bed Roughness; Bed Slope; Elevation; Glaciers/ice Sheet; Glaciers/Ice Sheet; Pinning Points", "locations": "Antarctica; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Earth Sciences; Antarctic Earth Sciences", "persons": "Simkins, Lauren; Stearns, Leigh; Riverman, Kiya", "project_titles": "Collaborative Research: Topographic controls on Antarctic Ice Sheet grounding line retreat - integrating models and observations; Evidence for Paleo Ice Stream Collapse in the Western Ross Sea since the Last Glacial Maximum.", "projects": [{"proj_uid": "p0000395", "repository": "USAP-DC", "title": "Evidence for Paleo Ice Stream Collapse in the Western Ross Sea since the Last Glacial Maximum."}, {"proj_uid": "p0010269", "repository": "USAP-DC", "title": "Collaborative Research: Topographic controls on Antarctic Ice Sheet grounding line retreat - integrating models and observations"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Circum-Antarctic grounding-line sinuosity", "uid": "601484", "west": -180.0}, {"awards": "1443263 Higgins, John", "bounds_geometry": ["POINT(159.35507 -76.73286)"], "date_created": "Tue, 02 Nov 2021 00:00:00 GMT", "description": "This file includes the d15N, O2/N2 ratio, Ar/N2 ratio, and d18O of O2 (d18Oatm) in Allan Hills ice cores (ALHIC1502 and ALHIC1503). This dataset replaces an earlier version of the elemental and isotopic composition in Allan Hills ice cores (DOI: 10.15784/601204) by adding new data from 60 depths in ALHIC1502 core (26.26 m to 175.74 m). ", "east": 159.35507, "geometry": ["POINT(159.35507 -76.73286)"], "keywords": "Allan Hills; Antarctica; Argon; Ice; Ice Core Data; Ice Core Gas Records; Isotope; Mass Spectrometry; Nitrogen; Oxygen", "locations": "Antarctica; Allan Hills", "north": -76.73286, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Yan, Yuzhen; Bender, Michael; Higgins, John", "project_titles": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area", "projects": [{"proj_uid": "p0000760", "repository": "USAP-DC", "title": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.73286, "title": "Elemental and isotopic composition of nitrogen, oxygen, and argon in Allan Hills ice cores", "uid": "601483", "west": 159.35507}, {"awards": "1543498 Ballard, Grant", "bounds_geometry": ["POLYGON((-180 -65,-176 -65,-172 -65,-168 -65,-164 -65,-160 -65,-156 -65,-152 -65,-148 -65,-144 -65,-140 -65,-140 -66.3,-140 -67.6,-140 -68.9,-140 -70.2,-140 -71.5,-140 -72.8,-140 -74.1,-140 -75.4,-140 -76.7,-140 -78,-144 -78,-148 -78,-152 -78,-156 -78,-160 -78,-164 -78,-168 -78,-172 -78,-176 -78,180 -78,177 -78,174 -78,171 -78,168 -78,165 -78,162 -78,159 -78,156 -78,153 -78,150 -78,150 -76.7,150 -75.4,150 -74.1,150 -72.8,150 -71.5,150 -70.2,150 -68.9,150 -67.6,150 -66.3,150 -65,153 -65,156 -65,159 -65,162 -65,165 -65,168 -65,171 -65,174 -65,177 -65,-180 -65))"], "date_created": "Mon, 01 Nov 2021 00:00:00 GMT", "description": "Positions of migrating, molting, and wintering Adelie penguins from Cape Royds and Cape Crozier, Ross Island as calculated from geolocation sensors (GLS) using probabilistic methods (R package SGAT)", "east": -140.0, "geometry": ["POINT(-175 -71.5)"], "keywords": "Adelie Penguin; Animal Behavior Observation; Antarctica; Biologging; Biota; Foraging Ecology; Geolocator; GPS Data; Migration; Ross Sea; Winter", "locations": "Ross Sea; Antarctica", "north": -65.0, "nsf_funding_programs": "Antarctic Instrumentation and Support", "persons": "Ballard, Grant; Schmidt, Annie; Lescroel, Amelie; Dugger, Katie; Ainley, David; Lisovski, Simeon", "project_titles": "A Full Lifecycle Approach to Understanding Ad\u00e9lie Penguin Response to Changing Pack Ice Conditions in the Ross Sea.", "projects": [{"proj_uid": "p0010177", "repository": "USAP-DC", "title": "A Full Lifecycle Approach to Understanding Ad\u00e9lie Penguin Response to Changing Pack Ice Conditions in the Ross Sea."}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Locations of Adelie penguins from geolocating dive recorders 2017-2019", "uid": "601482", "west": 150.0}, {"awards": "1738992 Pettit, Erin C", "bounds_geometry": ["POLYGON((-114 -74,-113 -74,-112 -74,-111 -74,-110 -74,-109 -74,-108 -74,-107 -74,-106 -74,-105 -74,-104 -74,-104 -74.2,-104 -74.4,-104 -74.6,-104 -74.8,-104 -75,-104 -75.2,-104 -75.4,-104 -75.6,-104 -75.8,-104 -76,-105 -76,-106 -76,-107 -76,-108 -76,-109 -76,-110 -76,-111 -76,-112 -76,-113 -76,-114 -76,-114 -75.8,-114 -75.6,-114 -75.4,-114 -75.2,-114 -75,-114 -74.8,-114 -74.6,-114 -74.4,-114 -74.2,-114 -74))"], "date_created": "Mon, 11 Oct 2021 00:00:00 GMT", "description": "This dataset includes GeoTiffs of two-year averages of ice flow velocity (including x- and y-components and flow speed) and longitudinal, transverse, and shear strain rates for the Thwaites Eastern Ice Shelf (TEIS) from 2001-2020. The grids were derived from feature tracking on MODIS, Landsat-7, and Landsat-8 imagery. Each pixel in a grid represents the median value of a stack of all available pixels for each time period. Data are gridded at a 500 m spatial resolution in a polar stereographic (EPSG:3031) projection. Speed units are m/day and strain rates are in units of /day. In addition, we provide videos of each variable (excluding x- and y-velocity components) placed alongside a MODIS image of the same extent and from around the same time to provide context. In addition to the variables noted above, we include videos for flow direction (in degrees from grid north in an EPSG:3031 projection) and a zoomed-in version of flow direction, which were calculated from the provided grids.", "east": -104.0, "geometry": ["POINT(-109 -75)"], "keywords": "Antarctica; Glaciology; Ice Shelf; Ice Velocity; Strain Rate; Thwaites Glacier", "locations": "Antarctica; Thwaites Glacier", "north": -74.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Alley, Karen; Wild, Christian; Scambos, Ted; Muto, Atsu; Pettit, Erin; Truffer, Martin; Wallin, Bruce; Klinger, Marin", "project_titles": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment", "projects": [{"proj_uid": "p0010162", "repository": "USAP-DC", "title": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -76.0, "title": "Two-year velocity and strain-rate averages from the Thwaites Eastern Ice Shelf, 2001-2020", "uid": "601478", "west": -114.0}, {"awards": "1246353 Anderson, John; 1745055 Stearns, Leigh; 1745043 Simkins, Lauren", "bounds_geometry": ["POLYGON((174 -75,174.4 -75,174.8 -75,175.2 -75,175.6 -75,176 -75,176.4 -75,176.8 -75,177.2 -75,177.6 -75,178 -75,178 -75.2,178 -75.4,178 -75.6,178 -75.8,178 -76,178 -76.2,178 -76.4,178 -76.6,178 -76.8,178 -77,177.6 -77,177.2 -77,176.8 -77,176.4 -77,176 -77,175.6 -77,175.2 -77,174.8 -77,174.4 -77,174 -77,174 -76.8,174 -76.6,174 -76.4,174 -76.2,174 -76,174 -75.8,174 -75.6,174 -75.4,174 -75.2,174 -75))"], "date_created": "Mon, 04 Oct 2021 00:00:00 GMT", "description": "Bathymetry from multibeam echo sounding data in Pennell Trough, Ross Sea, Antarctica was collected onboard the RVIB Nathaniel B. Palmer (NBP) 15-02 cruise using a Kongsberg EM122 operating in dual swath mode at 12 kHz frequency with a 1\u00b0\u00d71\u00b0 beam width, swath angular coverage set to 62\u00b0\u00d762\u00b0, and 30-60% overlap between survey lines. All raw, ping-edited geophysical data collected on NBP15-02 can be accessed using the Marine Geoscience Data System (Cruise DOI: 10.7284/901477). The bathymetry dataset here is gridded at 20-m resolution with a water depth-dependent vertical resolution on the order of decimeters. Two shapefiles are provided for ice-marginal landforms and meltwater landforms observable in the bathymetry data. The purpose of collecting the bathymetry data on cruise NBP15-02 was to better understand the glacial history of the Ross Sea, and the dataset, inclusive of bathymetry data and shapefiles of glacial landforms, from Pennell Trough are used to understand impacts on subglacial channel morphology and organization during the deglaciation of the region following the Last Glacial Maximum. The published dataset was used and analyzed in the article \"Topographic controls on channelized meltwater in the subglacial environment\" by Simkins, L.M., Greenwood, S.L., Munevar Garcia, S., Eareckson, E.A., Anderson, J.B., and Prothro, L.O, which was published in Geophysical Research Letters in 2021 (DOI: 10.1029/2021GL094678).", "east": 178.0, "geometry": ["POINT(176 -76)"], "keywords": "Antarctica; Bathymetry; Elevation; Geomorphology; Glacial History; Glaciers/ice Sheet; Glaciers/Ice Sheet; Marine Geoscience; NBP1502; Pennell Trough; Ross Sea; R/v Nathaniel B. Palmer", "locations": "Ross Sea; Pennell Trough; Antarctica", "north": -75.0, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Earth Sciences", "persons": "Greenwood, Sarah; Munevar Garcia, Santiago; Eareckson, Elizabeth; Anderson, John; Prothro, Lindsay; Simkins, Lauren", "project_titles": "Collaborative Research: Topographic controls on Antarctic Ice Sheet grounding line retreat - integrating models and observations; Evidence for Paleo Ice Stream Collapse in the Western Ross Sea since the Last Glacial Maximum.", "projects": [{"proj_uid": "p0010269", "repository": "USAP-DC", "title": "Collaborative Research: Topographic controls on Antarctic Ice Sheet grounding line retreat - integrating models and observations"}, {"proj_uid": "p0000395", "repository": "USAP-DC", "title": "Evidence for Paleo Ice Stream Collapse in the Western Ross Sea since the Last Glacial Maximum."}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.0, "title": "Pennell Trough, Ross Sea bathymetry and glacial landforms", "uid": "601474", "west": 174.0}, {"awards": "0440775 Jacobs, Stanley", "bounds_geometry": ["POLYGON((-180 -71.12,-172.34 -71.12,-164.68 -71.12,-157.02 -71.12,-149.36 -71.12,-141.7 -71.12,-134.04 -71.12,-126.38 -71.12,-118.72 -71.12,-111.06 -71.12,-103.4 -71.12,-103.4 -71.833,-103.4 -72.546,-103.4 -73.259,-103.4 -73.972,-103.4 -74.685,-103.4 -75.398,-103.4 -76.111,-103.4 -76.824,-103.4 -77.537,-103.4 -78.25,-111.06 -78.25,-118.72 -78.25,-126.38 -78.25,-134.04 -78.25,-141.7 -78.25,-149.36 -78.25,-157.02 -78.25,-164.68 -78.25,-172.34 -78.25,180 -78.25,178.657 -78.25,177.314 -78.25,175.971 -78.25,174.628 -78.25,173.285 -78.25,171.942 -78.25,170.599 -78.25,169.256 -78.25,167.913 -78.25,166.57 -78.25,166.57 -77.537,166.57 -76.824,166.57 -76.111,166.57 -75.398,166.57 -74.685,166.57 -73.972,166.57 -73.259,166.57 -72.546,166.57 -71.833,166.57 -71.12,167.913 -71.12,169.256 -71.12,170.599 -71.12,171.942 -71.12,173.285 -71.12,174.628 -71.12,175.971 -71.12,177.314 -71.12,178.657 -71.12,-180 -71.12))"], "date_created": "Fri, 17 Sep 2021 00:00:00 GMT", "description": "This dataset contains images and field description of Smith-McIntyre sediment grab samples from Expedition NBP0702 between the Ross Sea and the Amundsen Sea. ", "east": -103.4, "geometry": ["POINT(-148.415 -74.685)"], "keywords": "Amundsen Sea; Antarctica; Marine Geoscience; Marine Sediments; NBP0702; Photo; R/v Nathaniel B. Palmer; Seafloor Sampling; Sediment Description; Smith-Mcintyre Grab", "locations": "Amundsen Sea; Antarctica; Amundsen Sea", "north": -71.12, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Leventer, Amy; Jacobs, Stanley", "project_titles": "The Amundsen Continental Shelf and the Antarctic Ice Sheet", "projects": [{"proj_uid": "p0000836", "repository": "USAP-DC", "title": "The Amundsen Continental Shelf and the Antarctic Ice Sheet"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.25, "title": "NBP0702 surface sediment sample information and images", "uid": "601473", "west": 166.57}, {"awards": "1543441 Fricker, Helen; 1656518 Gumport, Patricia", "bounds_geometry": null, "date_created": "Tue, 14 Sep 2021 00:00:00 GMT", "description": "This dataset includes raw, uncalibrated voltage vs time measurements from a bistatic radar receiver. We also include some processed data including upsampled matched filtered data, GPS receiver position, antenna separation", "east": null, "geometry": null, "keywords": "Antarctica; Bistatic Radar; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPS Data; Greenland; Lake Whillans; Radar; Store Glacier; Whillans Ice Stream; WISSARD", "locations": "Greenland; Lake Whillans; Antarctica; Whillans Ice Stream; Store Glacier", "north": null, "nsf_funding_programs": "Antarctic Integrated System Science; Antarctic Integrated System Science", "persons": "Bienert, Nicole; Schroeder, Dustin; Siegfried, Matthew; Peters, Sean; MacKie, Emma; Dawson, Eliza; Christoffersen, Poul", "project_titles": "Collaborative Research: Subglacial Antarctic Lakes Scientific Access (SALSA): Integrated Study of Carbon Cycling in Hydrologically-active Subglacial Environments", "projects": [{"proj_uid": "p0010119", "repository": "USAP-DC", "title": "Collaborative Research: Subglacial Antarctic Lakes Scientific Access (SALSA): Integrated Study of Carbon Cycling in Hydrologically-active Subglacial Environments"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WISSARD", "south": null, "title": "Bistatic Radar Sounding of Whillans Ice Stream, Antarctica and Store Glacier, Greenland", "uid": "601472", "west": null}, {"awards": "2039432 Grapenthin, Ronni; 1643952 Grapenthin, Ronni; 1917149 Grapenthin, Ronni", "bounds_geometry": ["POLYGON((166 -77.1,166.39 -77.1,166.78 -77.1,167.17 -77.1,167.56 -77.1,167.95 -77.1,168.34 -77.1,168.73 -77.1,169.12 -77.1,169.51 -77.1,169.9 -77.1,169.9 -77.18,169.9 -77.26,169.9 -77.34,169.9 -77.42,169.9 -77.5,169.9 -77.58,169.9 -77.66,169.9 -77.74,169.9 -77.82,169.9 -77.9,169.51 -77.9,169.12 -77.9,168.73 -77.9,168.34 -77.9,167.95 -77.9,167.56 -77.9,167.17 -77.9,166.78 -77.9,166.39 -77.9,166 -77.9,166 -77.82,166 -77.74,166 -77.66,166 -77.58,166 -77.5,166 -77.42,166 -77.34,166 -77.26,166 -77.18,166 -77.1))"], "date_created": "Fri, 03 Sep 2021 00:00:00 GMT", "description": "We use NASA\u0027s Jet Propulsion Laboratory\u0027s (JPL) GipsyX software in PPP mode with ambiguity resolution \r\napplied to 24 hour segments of data to generate daily position solutions. We use JPL\u0027s orbit and\r\nclock products and International GNSS Service (IGS) antenna phase center models. Where available, \r\nwe use JPL\u0027s second order ionospheric corrections, otherwise we fall back on those provided by the \r\nIGS. To correct tropospheric delays, we use the GPT2 model as implemented in GipsyX. Ocean tidal \r\nloading corrections utilize the TPXO7.2 and ATLAS model, a combination of hydrodynamic model and \r\naltimetry data, with respect to Earth\u0027s Center of Mass implemented in SPOTL. We obtain position \r\nsolutions for each station day in a fiducial-free reference frame, which we then transform into \r\nthe 2014 International Reference Frame using JPL\u0027s transformation coefficients and generate\r\ntimeseries of position change relative to the first epoch, given in the *.series files which \r\nare ASCII files with the following columns:\r\n\r\ndecimal year\r\ndisplacement east (m)\r\ndisplacement north (m)\r\ndisplacement up (m) \r\nsigma east (m)\r\nsigma north (m)\r\nsigma up (m)\r\neast-north covariance\r\neast-up covariance\r\nnorth-up covariance\r\nYear (YYYY)\r\nMonth (MM)\r\nDay (DD)\r\nHour (hh)\r\nMinute (mm)\r\nSecond (ss)\r\nSolution path\r\n \r\nWe generate position time series relative to stable Antarctic plate by removing the plate velocities \r\nmodeled by Argus et al (2010). These are provided in the *.npy files that be readily read into \r\npython scripts:\r\n\r\npos_ts = np.load(\u0027test.npy\u0027).flatten()[0]\r\n\r\npos_ts[\u0027itrf\u0027] provides the ITRF data as above\r\npos_ts[\u0027plate\u0027] provides the data with Antarctic plate motion removed. ", "east": 169.9, "geometry": ["POINT(167.95 -77.5)"], "keywords": "Antarctica; GPS; Mount Erebus; Ross Island", "locations": "Ross Island; Ross Island; Antarctica; Mount Erebus", "north": -77.1, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Earth Sciences; Antarctic Earth Sciences", "persons": "Grapenthin, Ronni", "project_titles": "Collaborative Research: Multi-Parameter Geophysical Constraints on Volcano Dynamics of Mt. Erebus and Ross Island, Antarctica", "projects": [{"proj_uid": "p0010255", "repository": "USAP-DC", "title": "Collaborative Research: Multi-Parameter Geophysical Constraints on Volcano Dynamics of Mt. Erebus and Ross Island, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.9, "title": "Erebus GPS timeseries ", "uid": "601471", "west": 166.0}, {"awards": null, "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Fri, 13 Aug 2021 00:00:00 GMT", "description": "This data set contains (1) ice thickness (H) and basal sliding coefficient (beta) maps for the Antarctic Ice Sheet from Arthern et al. (2015) \"Flow speed within the Antarctic ice sheet and its controls inferred from satellite observations\", and (2) Antarctic subglacial lake locations and estimated sizes from Siegfried and Fricker (2018) \"Thirteen years of subglacial lake activity in Antarctica from multi-mission satellite altimetry\". Data are in zarr (thickness and sliding coefficient maps) and ASCII (lake locations and sizes) formats.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Antarctic Ice Sheet; Ice Thickness; Subglacial Lake", "locations": "Antarctica; Antarctic Ice Sheet", "north": -60.0, "nsf_funding_programs": null, "persons": "Stubblefield, Aaron; Kingslake, Jonathan; Siegfried, Matthew; Arthern, Robert", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -90.0, "title": "Antarctic Ice Thickness, Slipperiness, and Subglacial Lake Locations", "uid": "601470", "west": -180.0}, {"awards": "1745057 Walker, Sally", "bounds_geometry": ["POLYGON((163.4 -77.3,163.46 -77.3,163.52 -77.3,163.58 -77.3,163.64 -77.3,163.7 -77.3,163.76 -77.3,163.82 -77.3,163.88 -77.3,163.94 -77.3,164 -77.3,164 -77.33,164 -77.36,164 -77.39,164 -77.42,164 -77.45,164 -77.48,164 -77.51,164 -77.54,164 -77.57,164 -77.6,163.94 -77.6,163.88 -77.6,163.82 -77.6,163.76 -77.6,163.7 -77.6,163.64 -77.6,163.58 -77.6,163.52 -77.6,163.46 -77.6,163.4 -77.6,163.4 -77.57,163.4 -77.54,163.4 -77.51,163.4 -77.48,163.4 -77.45,163.4 -77.42,163.4 -77.39,163.4 -77.36,163.4 -77.33,163.4 -77.3))"], "date_created": "Thu, 12 Aug 2021 00:00:00 GMT", "description": "This data set includes measurements of shell growth between striae (small, comarginal ridges on valve surfaces) and visual analysis of striae groups. The script analyses the variation among striae groups, and time series analysis of interstrial increments. ", "east": 164.0, "geometry": ["POINT(163.7 -77.45)"], "keywords": "Adamussium Colbecki; Antarctica; McMurdo", "locations": "Antarctica; McMurdo", "north": -77.3, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Cronin, Kelly; Walker, Sally", "project_titles": "Collaborative research: The Antarctic Scallop as Key to Paleoenvironments and Sea Ice Conditions: Understanding the Modern to Predict the Past", "projects": [{"proj_uid": "p0010238", "repository": "USAP-DC", "title": "Collaborative research: The Antarctic Scallop as Key to Paleoenvironments and Sea Ice Conditions: Understanding the Modern to Predict the Past"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.6, "title": "Analysis of striae groups and interstrial increments from Adamussium colbecki valves from Explorers Cove and Bay of Sails", "uid": "601469", "west": 163.4}, {"awards": "1745057 Walker, Sally", "bounds_geometry": ["POLYGON((163.4 -77.3,163.46 -77.3,163.52 -77.3,163.58 -77.3,163.64 -77.3,163.7 -77.3,163.76 -77.3,163.82 -77.3,163.88 -77.3,163.94 -77.3,164 -77.3,164 -77.33,164 -77.36,164 -77.39,164 -77.42,164 -77.45,164 -77.48,164 -77.51,164 -77.54,164 -77.57,164 -77.6,163.94 -77.6,163.88 -77.6,163.82 -77.6,163.76 -77.6,163.7 -77.6,163.64 -77.6,163.58 -77.6,163.52 -77.6,163.46 -77.6,163.4 -77.6,163.4 -77.57,163.4 -77.54,163.4 -77.51,163.4 -77.48,163.4 -77.45,163.4 -77.42,163.4 -77.39,163.4 -77.36,163.4 -77.33,163.4 -77.3))"], "date_created": "Wed, 11 Aug 2021 00:00:00 GMT", "description": "This dataset contains yearly growth increments (mm) of live-collected Adamussium colbecki from Explorers Cove and Bay of Sails in Western McMurdo Sound. Annual growth is delineated by annuli (external growth bands; see Cronin et al., 2020). Straight length measurements were taken with digital calipers from umbo to ventral margin along the central axis. The purpose of data collection was to compare growth and lifespan of A. colbecki under annual and multiannual sea ice. ", "east": 164.0, "geometry": ["POINT(163.7 -77.45)"], "keywords": "Adamussium Colbecki; Antarctica; Growth; McMurdo Sound; Shell Fish", "locations": "Antarctica; McMurdo Sound", "north": -77.3, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Cronin, Kelly; Walker, Sally", "project_titles": "Collaborative research: The Antarctic Scallop as Key to Paleoenvironments and Sea Ice Conditions: Understanding the Modern to Predict the Past", "projects": [{"proj_uid": "p0010238", "repository": "USAP-DC", "title": "Collaborative research: The Antarctic Scallop as Key to Paleoenvironments and Sea Ice Conditions: Understanding the Modern to Predict the Past"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.6, "title": "Annual growth of Adamussium colbecki from Explorers Cove and Bay of Sails", "uid": "601468", "west": 163.4}, {"awards": "1245871 McCarthy, Christine", "bounds_geometry": null, "date_created": "Fri, 30 Jul 2021 00:00:00 GMT", "description": "This data set contains rate and state frictional parameters for ice-on-rock friction experiments that were conducted in a double direct shear apparatus as temperatures of -16.4 C to -2 C. The frictional parameters were deteremined by directly fitting the frictional response to controlled, harmonic oscillations in load point velocity. The data set includes all information needed to reproduce the fits, as well as tables of the frictional parameters for both the aging and slip law forms of frictional state evolution.", "east": null, "geometry": null, "keywords": "Antarctica", "locations": "Antarctica", "north": null, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Skarbek, Rob; McCarthy, Christine M.; Savage, Heather", "project_titles": "Laboratory Study of Ice Deformation under Tidal Loading Conditions with Application to Antarctic Glaciers", "projects": [{"proj_uid": "p0010186", "repository": "USAP-DC", "title": "Laboratory Study of Ice Deformation under Tidal Loading Conditions with Application to Antarctic Glaciers"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Rate-state friction parameters for ice-on-rock oscillation experiments", "uid": "601467", "west": null}, {"awards": "0839137 Welten, Kees; 0839042 Caffee, Marc", "bounds_geometry": ["POLYGON((-113 -79.25,-112.8 -79.25,-112.6 -79.25,-112.4 -79.25,-112.2 -79.25,-112 -79.25,-111.8 -79.25,-111.6 -79.25,-111.4 -79.25,-111.2 -79.25,-111 -79.25,-111 -79.3,-111 -79.35,-111 -79.4,-111 -79.45,-111 -79.5,-111 -79.55,-111 -79.6,-111 -79.65,-111 -79.7,-111 -79.75,-111.2 -79.75,-111.4 -79.75,-111.6 -79.75,-111.8 -79.75,-112 -79.75,-112.2 -79.75,-112.4 -79.75,-112.6 -79.75,-112.8 -79.75,-113 -79.75,-113 -79.7,-113 -79.65,-113 -79.6,-113 -79.55,-113 -79.5,-113 -79.45,-113 -79.4,-113 -79.35,-113 -79.3,-113 -79.25))"], "date_created": "Tue, 27 Jul 2021 00:00:00 GMT", "description": "This is the second part of the 10Be data set for the WAIS Divide Core WDC06A ice core, from 1190.69 to 2453.25 m depth, produced by UC Berkeley\u0027s Space Sciences Laboratory and Purdue University\u0027s PRIME Laboratory. Each sample represents a continuous ice core section of ~3 m long (although they vary from 1.9 to 4.2 m). Experimental procedures for the extraction of 10Be from the ice samples and the measurement of 10Be by accelerator mass spectrometry (AMS) are described in Woodruff et al. (2013).", "east": -111.0, "geometry": ["POINT(-112 -79.5)"], "keywords": "Antarctica; West Antarctic Ice Sheet", "locations": "West Antarctic Ice Sheet; Antarctica", "north": -79.25, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Welten, Kees; Nishiizumi, Kunihiko; Caffee, M. W.; Woodruff, T. E.", "project_titles": "Collaborative Research: Cosmogenic Radionuclides in the Deep WAIS Divide Core", "projects": [{"proj_uid": "p0000103", "repository": "USAP-DC", "title": "Collaborative Research: Cosmogenic Radionuclides in the Deep WAIS Divide Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.75, "title": "Cosmogenic 10Be in WAIS Divide Ice core, 1190-2453 m", "uid": "601466", "west": -113.0}, {"awards": "1746148 Sirovic, Ana", "bounds_geometry": ["POLYGON((143.6 -65,143.99 -65,144.38 -65,144.77 -65,145.16 -65,145.55 -65,145.94 -65,146.33 -65,146.72 -65,147.11 -65,147.5 -65,147.5 -65.12,147.5 -65.24,147.5 -65.36,147.5 -65.48,147.5 -65.6,147.5 -65.72,147.5 -65.84,147.5 -65.96,147.5 -66.08,147.5 -66.2,147.11 -66.2,146.72 -66.2,146.33 -66.2,145.94 -66.2,145.55 -66.2,145.16 -66.2,144.77 -66.2,144.38 -66.2,143.99 -66.2,143.6 -66.2,143.6 -66.08,143.6 -65.96,143.6 -65.84,143.6 -65.72,143.6 -65.6,143.6 -65.48,143.6 -65.36,143.6 -65.24,143.6 -65.12,143.6 -65))"], "date_created": "Wed, 21 Jul 2021 00:00:00 GMT", "description": "Logs of cetacean calls recorded using High-frequency Acoustic Recording Package (HARP) deployed in February 2019 off East Antarctica. 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P; Tozer, Carly; Steinhage, Daniel; Urbini, Stefano; Corr, Hugh F. J.; Van Ommen, Tas; Blankenship, Donald D.", "project_titles": "Collaborative Research: Southern Plateau Ice-sheet Characterization and Evolution of the Central Antarctic Plate (SPICECAP)", "projects": [{"proj_uid": "p0010115", "repository": "USAP-DC", "title": "Collaborative Research: Southern Plateau Ice-sheet Characterization and Evolution of the Central Antarctic Plate (SPICECAP)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Dome C Ice Core", "south": -76.4, "title": "ICECAP: Gridded boundary conditions for Little Dome C, Antarctica, and extracted subglacial lake locations", "uid": "601463", "west": 118.0}, {"awards": "1443556 Thomson, Stuart", "bounds_geometry": ["POLYGON((-180 -83.5,-178 -83.5,-176 -83.5,-174 -83.5,-172 -83.5,-170 -83.5,-168 -83.5,-166 -83.5,-164 -83.5,-162 -83.5,-160 -83.5,-160 -83.75,-160 -84,-160 -84.25,-160 -84.5,-160 -84.75,-160 -85,-160 -85.25,-160 -85.5,-160 -85.75,-160 -86,-162 -86,-164 -86,-166 -86,-168 -86,-170 -86,-172 -86,-174 -86,-176 -86,-178 -86,180 -86,179 -86,178 -86,177 -86,176 -86,175 -86,174 -86,173 -86,172 -86,171 -86,170 -86,170 -85.75,170 -85.5,170 -85.25,170 -85,170 -84.75,170 -84.5,170 -84.25,170 -84,170 -83.75,170 -83.5,171 -83.5,172 -83.5,173 -83.5,174 -83.5,175 -83.5,176 -83.5,177 -83.5,178 -83.5,179 -83.5,-180 -83.5))"], "date_created": "Tue, 13 Jul 2021 00:00:00 GMT", "description": "List of supplementary tables from publication\r\nHe, J., Thomson, S.N., Reiners, P.W., Hemming, S.R., and Licht, K.J., 2021, Rapid erosion of the central Transantarctic Mountains at the Eocene-Oligocene transition: Evidence from skewed (U-Th)/He date distributions near Beardmore Glacier: Earth and Planetary Science Letters, v. 567, p. 117009, doi:10.1016/j.epsl.2021.117009.\r\n\r\nSupp. Table 1 U-Th/He data\r\nSupp. Table 2 Trace and REE data\r\nSupp. Table 3 Compilation with elevation-weighted resampling\r\nSupp. Table 4 Summary statistics and sampling distribution of large-n samples and compilations.\r\nSupp. Table 5 Perpendicular distance of BAR and CMK sample to Kukri Peneplain\r\nSupp. Table 6 Compilation of apatite He data from east Antarctica used in Fig. 1\r\n", "east": -160.0, "geometry": ["POINT(-175 -84.75)"], "keywords": "Antarctica; Beardmore Glacier; Erosion; Landscape Evolution; Shackleton Glacier; Transantarctic Mountains; (U-Th)/He", "locations": "Antarctica; Transantarctic Mountains; Beardmore Glacier; Shackleton Glacier", "north": -83.5, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Thomson, Stuart; He, John; Reiners, Peter; Hemming, Sidney R.; Licht, Kathy", "project_titles": "Collaborative Research: East Antarctic Glacial Landscape Evolution (EAGLE): A Study using Combined Thermochronology, Geochronology and Provenance Analysis", "projects": [{"proj_uid": "p0010188", "repository": "USAP-DC", "title": "Collaborative Research: East Antarctic Glacial Landscape Evolution (EAGLE): A Study using Combined Thermochronology, Geochronology and Provenance Analysis"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -86.0, "title": "Apatite (U-Th)/He and TREE Data Central Transantarctic Mountains", "uid": "601462", "west": 170.0}, {"awards": "1443690 Young, Duncan", "bounds_geometry": ["POLYGON((-180 -86,-144 -86,-108 -86,-72 -86,-36 -86,0 -86,36 -86,72 -86,108 -86,144 -86,180 -86,180 -86.4,180 -86.8,180 -87.2,180 -87.6,180 -88,180 -88.4,180 -88.8,180 -89.2,180 -89.6,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -89.6,-180 -89.2,-180 -88.8,-180 -88.4,-180 -88,-180 -87.6,-180 -87.2,-180 -86.8,-180 -86.4,-180 -86))"], "date_created": "Thu, 08 Jul 2021 00:00:00 GMT", "description": "Gravity and magnetics data collected by PRIC Basler SnowEagle 601 over Titan Dome, as part of the ICECAP project and SPICECAP in particular.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; ICECAP; Titan Dome", "locations": "Antarctica; Titan Dome", "north": -86.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Greenbaum, Jamin; Young, Duncan A.; Blankenship, Donald D.; Jingxue, Guo; Bo, Sun", "project_titles": "Collaborative Research: Southern Plateau Ice-sheet Characterization and Evolution of the Central Antarctic Plate (SPICECAP)", "projects": [{"proj_uid": "p0010115", "repository": "USAP-DC", "title": "Collaborative Research: Southern Plateau Ice-sheet Characterization and Evolution of the Central Antarctic Plate (SPICECAP)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Airborne potential fields data from Titan Dome, Antarctica", "uid": "601461", "west": -180.0}, {"awards": "1643120 Iverson, Neal", "bounds_geometry": null, "date_created": "Thu, 01 Jul 2021 00:00:00 GMT", "description": "This dataset contains parameters and results of laboratory experiments in which temperate ice with various water contents was sheared at controlled rates.", "east": null, "geometry": null, "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Stream; Lab Experiment; Rheology; Snow/ice; Snow/Ice; Water Content", "locations": "Antarctica", "north": null, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Iverson, Neal", "project_titles": "NSFGEO-NERC: Collaborative Research: Two-Phase Dynamics of Temperate Ice", "projects": [{"proj_uid": "p0010197", "repository": "USAP-DC", "title": "NSFGEO-NERC: Collaborative Research: Two-Phase Dynamics of Temperate Ice"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Softening of temperate ice by interstitial water", "uid": "601460", "west": null}, {"awards": "0739575 Emslie, Steven", "bounds_geometry": ["POLYGON((-57.3 -63.3,-57.22 -63.3,-57.14 -63.3,-57.06 -63.3,-56.98 -63.3,-56.9 -63.3,-56.82 -63.3,-56.74 -63.3,-56.66 -63.3,-56.58 -63.3,-56.5 -63.3,-56.5 -63.4,-56.5 -63.5,-56.5 -63.6,-56.5 -63.7,-56.5 -63.8,-56.5 -63.9,-56.5 -64,-56.5 -64.1,-56.5 -64.2,-56.5 -64.3,-56.58 -64.3,-56.66 -64.3,-56.74 -64.3,-56.82 -64.3,-56.9 -64.3,-56.98 -64.3,-57.06 -64.3,-57.14 -64.3,-57.22 -64.3,-57.3 -64.3,-57.3 -64.2,-57.3 -64.1,-57.3 -64,-57.3 -63.9,-57.3 -63.8,-57.3 -63.7,-57.3 -63.6,-57.3 -63.5,-57.3 -63.4,-57.3 -63.3))"], "date_created": "Wed, 30 Jun 2021 00:00:00 GMT", "description": "Total mercury concentrations and corrected stable isotope signatures quantified in Ad\u00e9lie Penguin eggshell membrane and feathers recovered from the breast of deceased fledglings. Samples were collected in the austral summer of 2013/2014 in the northern Antarctic Peninsula region.", "east": -56.5, "geometry": ["POINT(-56.9 -63.8)"], "keywords": "Adelie Penguin; Antarctica; Antarctic Peninsula; Mercury; Penguin", "locations": "Antarctic Peninsula; Antarctica", "north": -63.3, "nsf_funding_programs": null, "persons": "McKenzie, Ashley", "project_titles": "Stable Isotope Analyses of Pygoscelid Penguin remains from Active and Abandoned Colonies in Antarctica", "projects": [{"proj_uid": "p0000317", "repository": "USAP-DC", "title": "Stable Isotope Analyses of Pygoscelid Penguin remains from Active and Abandoned Colonies in Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.3, "title": "Egg membrane and chick feather THg concentration and stable isotope composition", "uid": "601459", "west": -57.3}, {"awards": "1644159 Jacobs, Stanley", "bounds_geometry": ["POLYGON((165 -76.5,165.6 -76.5,166.2 -76.5,166.8 -76.5,167.4 -76.5,168 -76.5,168.6 -76.5,169.2 -76.5,169.8 -76.5,170.4 -76.5,171 -76.5,171 -76.65,171 -76.8,171 -76.95,171 -77.1,171 -77.25,171 -77.4,171 -77.55,171 -77.7,171 -77.85,171 -78,170.4 -78,169.8 -78,169.2 -78,168.6 -78,168 -78,167.4 -78,166.8 -78,166.2 -78,165.6 -78,165 -78,165 -77.85,165 -77.7,165 -77.55,165 -77.4,165 -77.25,165 -77.1,165 -76.95,165 -76.8,165 -76.65,165 -76.5))"], "date_created": "Fri, 25 Jun 2021 00:00:00 GMT", "description": "Salinity and temperature at 50 \u0026 100 m intervals from profiles near Ross Island, Antarctica in 1936 and from 1956-57 through 2019-2020.", "east": 171.0, "geometry": ["POINT(168 -77.25)"], "keywords": "Antarctica; CTD; Oceans; Physical Oceanography; Ross Island; Ross Sea; Salinity; Temperature", "locations": "Antarctica; Ross Sea; Ross Island", "north": -76.5, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Jacobs, Stanley; Giulivi, Claudia F.", "project_titles": "West Antarctic Ice Shelf- Ocean Interactions ", "projects": [{"proj_uid": "p0010208", "repository": "USAP-DC", "title": "West Antarctic Ice Shelf- Ocean Interactions "}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Ross Island area DJF salinity and temperature records 1956-57 through 2019-20", "uid": "601458", "west": 165.0}, {"awards": "1543432 Hock, Regine", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Tue, 22 Jun 2021 00:00:00 GMT", "description": "This dataset contains the total number of days per year with meltwater present at the surface across the Antarctic ice sheet and surrounding ice shelves derived from passive microwave satellite observations for each melt year from 1979/80 to 2019/20. This data comes from daily and near-daily SMMR, SSM/I, and SSMIS results at 25 km resolution at 19 GHz horizontal polarization. Each melt year starts on July 1 and ends June 30. The melt detection algorithm is described in Johnson and others (2020) and uses KMeans clustering analysis of the annual brightness temperature time series on each pixel to detect melt for that pixel and year. ", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Melt Days; Passive Microwave; Snow/ice; Snow/Ice; Surface Melt", "locations": "Antarctica; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Johnson, Andrew; Hock, Regine; Fahnestock, Mark", "project_titles": "Collaborative Research: Present and Projected Future Forcings on Antarctic Peninsula Glaciers and Ice Shelves using the Weather Forecasting and Research (WRF) Model", "projects": [{"proj_uid": "p0010408", "repository": "USAP-DC", "title": "Collaborative Research: Present and Projected Future Forcings on Antarctic Peninsula Glaciers and Ice Shelves using the Weather Forecasting and Research (WRF) Model"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Antarctic passive microwave Kmeans derived surface melt days, 1979-2020", "uid": "601457", "west": -180.0}, {"awards": "1542723 Alexander, Becky", "bounds_geometry": ["POINT(-112.05 -79.28)"], "date_created": "Tue, 22 Jun 2021 00:00:00 GMT", "description": "This dataset contains measurements of nitrate oxygen (D17O) and nitrogen (d15N) isotopes from the WAIS Divide ice core (WDC06A). The time resolution is variable throughout the record. The data includes 15 discreet samples between 2900 - 67,000 years before 1950 and 305 continuous measurements between 36,000-52,000 years before 1950. The depth range is 700 - 3401 m. Each sample covered 1 m depth. The time resolution ranged from 5 years/m at the top to 200 years/m at the bottom.", "east": -112.05, "geometry": ["POINT(-112.05 -79.28)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Chemistry; Ice Core Records; Nitrate; Nitrate Isotopes; WAIS Divide Ice Core; West Antarctic Ice Sheet", "locations": "West Antarctic Ice Sheet; Antarctica", "north": -79.28, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Alexander, Becky", "project_titles": "Measuring an Ice-core Proxy for Relative Oxidant Abundances over Glacial-interglacial and Rapid Climate changes in a West Antarctic Ice Core", "projects": [{"proj_uid": "p0010403", "repository": "USAP-DC", "title": "Measuring an Ice-core Proxy for Relative Oxidant Abundances over Glacial-interglacial and Rapid Climate changes in a West Antarctic Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.28, "title": "WAIS Divide ice core nitrate isotopes", "uid": "601456", "west": -112.05}, {"awards": "1245283 Passchier, Sandra", "bounds_geometry": ["POINT(75.4045 -67.549667)"], "date_created": "Mon, 21 Jun 2021 00:00:00 GMT", "description": "This dataset contains measurements of terrigenous particle-size distributions on Eocene-Oligocene sediment from Ocean Drilling Program Site 742 in Prydz Bay. Carbonate and organic matter were removed through addition of 10mL aliquots of 30% H2O2, 2mL aliquots of 10% HCl to ~50-100mL suspension on a hot plate. Dispersion was through heating with sodium pyrophosphate. Samples were measured on a Malvern Mastersizer 2000 with a Hydro 2000MU (A) accessory, using a Refractive index of 1.544 (Quartz) and an absorption coefficient of 0.9. Results are in (vol. %) per size class, with diameter range equivalent to the diameter of spheres with the same volume as measured particles.", "east": 75.4045, "geometry": ["POINT(75.4045 -67.549667)"], "keywords": "Antarctica; Eocene; Marine Geoscience; ODP742; Oligocene; Particle Size; Prydz Bay; Sediment Core Data", "locations": "Prydz Bay; Antarctica", "north": -67.549667, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Passchier, Sandra; Ciarletta, Daniel", "project_titles": "The Stratigraphic Expression of the Onset of Glaciation in Eocene-Oligocene Successions on the Antarctic Continental Margin", "projects": [{"proj_uid": "p0000309", "repository": "USAP-DC", "title": "The Stratigraphic Expression of the Onset of Glaciation in Eocene-Oligocene Successions on the Antarctic Continental Margin"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -67.549667, "title": "Particle-size distributions of Eocene-Oligocene sediment from ODP Site 742, Prydz Bay", "uid": "601454", "west": 75.4045}, {"awards": "1245283 Passchier, Sandra", "bounds_geometry": ["POINT(74.787 -67.696167)"], "date_created": "Mon, 21 Jun 2021 00:00:00 GMT", "description": "This dataset contains measurements of terrigenous particle-size distributions on Eocene sediment from Ocean Drilling Program Site 1166 in Prydz Bay. Carbonate and organic matter were removed through addition of 10mL aliquots of 30% H2O2, 2mL aliquots of 10% HCl to ~50-100mL suspension on a hot plate. Dispersion was through heating with sodium pyrophosphate. Samples were measured on a Malvern Mastersizer 2000 with a Hydro 2000MU (A) accessory, using a Refractive index of 1.544 (Quartz) and an absorption coefficient of 0.9. Results are in (vol. %) per size class, with diameter range equivalent to the diameter of spheres with the same volume as measured particles.", "east": 74.787, "geometry": ["POINT(74.787 -67.696167)"], "keywords": "Antarctica; Eocene; Marine Geoscience; ODP1166; Particle Size; Prydz Bay; Sediment Core Data", "locations": "Prydz Bay; Antarctica", "north": -67.696167, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Passchier, Sandra; Ciarletta, Daniel", "project_titles": "The Stratigraphic Expression of the Onset of Glaciation in Eocene-Oligocene Successions on the Antarctic Continental Margin", "projects": [{"proj_uid": "p0000309", "repository": "USAP-DC", "title": "The Stratigraphic Expression of the Onset of Glaciation in Eocene-Oligocene Successions on the Antarctic Continental Margin"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -67.696167, "title": "Particle-size distributions of Eocene sediment from ODP Site 1166, Prydz Bay", "uid": "601455", "west": 74.787}, {"awards": "1245283 Passchier, Sandra", "bounds_geometry": ["POINT(75.081833 -67.276167)"], "date_created": "Mon, 21 Jun 2021 00:00:00 GMT", "description": "This dataset contains measurements of terrigenous particle-size distributions on Eocene-Oligocene sediment from Ocean Drilling Program Site 739 in Prydz Bay. Carbonate, and organic matter were removed through addition of 10mL aliquots of 30% H2O2, 2mL aliquots of 10% HCl to ~50-100mL suspension on a hot plate. Dispersion was through heating with sodium pyrophosphate. Samples were measured on a Malvern Mastersizer 2000 with a Hydro 2000MU (A) accessory, using a Refractive index of 1.544 (Quartz) and an absorption coefficient of 0.9. Results are in (vol. %) per size class, with diameter range equivalent to the diameter of spheres with the same volume as measured particles.", "east": 75.081833, "geometry": ["POINT(75.081833 -67.276167)"], "keywords": "Antarctica; Eocene; Marine Geoscience; ODP739; Oligocene; Particle Size; Prydz Bay; Sediment Core Data", "locations": "Antarctica; Prydz Bay", "north": -67.276167, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Passchier, Sandra; Ciarletta, Daniel", "project_titles": "The Stratigraphic Expression of the Onset of Glaciation in Eocene-Oligocene Successions on the Antarctic Continental Margin", "projects": [{"proj_uid": "p0000309", "repository": "USAP-DC", "title": "The Stratigraphic Expression of the Onset of Glaciation in Eocene-Oligocene Successions on the Antarctic Continental Margin"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -67.276167, "title": "Particle-size distributions of Eocene-Oligocene sediment from ODP Site 739, Prydz Bay", "uid": "601453", "west": 75.081833}, {"awards": "1060080 TBD", "bounds_geometry": ["POINT(144 -65)"], "date_created": "Mon, 14 Jun 2021 00:00:00 GMT", "description": "This dataset contains measurements of terrigenous particle-size distributions on Pliocene sediment from Integrated Ocean Drilling Program Site U1359 on the Wilkes Land margin. Biogenic silica, carbonate, and organic matter were removed through addition of 10mL aliquots of 30% H2O2, 2mL aliquots of 10% HCl to ~50-100mL suspension on a hot plate, and after supernatant was removed, digestion in 0.2 N NaOH at ~85 degrees for 1 hour. Dispersion was through heating with sodium pyrophosphate. Samples were measured on a Malvern Mastersizer 2000 with a Hydro 2000MU (A) accessory, using a Refractive index of 1.6 (Illite) and an absorption coefficient of 0.9. Results are in (vol. %) per size class, with diameter range equivalent to the diameter of spheres with the same volume as measured particles.", "east": 144.0, "geometry": ["POINT(144 -65)"], "keywords": "Antarctica; Ice-Rafting; Marine Geoscience; Paleoclimate; Particle Size; Sediment Core Data; Wilkes Land", "locations": "Wilkes Land; Antarctica", "north": -65.0, "nsf_funding_programs": null, "persons": "Passchier, Sandra; Hansen, Melissa A.; Rosenberg, Jessica", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -65.0, "title": "Particle-size distributions of Pliocene sediment from IODP Site U1359", "uid": "601450", "west": 144.0}, {"awards": "0838842 Passchier, Sandra", "bounds_geometry": ["POINT(167.0833 -77.8889)"], "date_created": "Mon, 14 Jun 2021 00:00:00 GMT", "description": "This dataset contains measurements of particle-size distributions on four intervals of diamicitites from ANDRILL Site AND-2A. Carbonate, and organic matter were removed through addition of 10mL aliquots of 30% H2O2 and 2mL aliquots of 10% HCl to ~50-100mL suspension on a hot plate. Dispersion was through heating with sodium pyrophosphate. Samples were measured on a Malvern Mastersizer 2000 with a Hydro 2000MU (A) accessory, using a Refractive index of 1.544 (Quartz) and an absorption coefficient of 0.9. Results are in (vol. %) per size class, with diameter range equivalent to the diameter of spheres with the same volume as measured particles.", "east": 167.0833, "geometry": ["POINT(167.0833 -77.8889)"], "keywords": "Antarctica; McMurdo Sound; Miocene; Particle Size; Pleistocene; Pliocene", "locations": "Antarctica; McMurdo Sound", "north": -77.8889, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Passchier, Sandra; Hansen, Melissa A.", "project_titles": "Determining Middle Miocene through Pliocene Changes in Paleo Ice-flow and Basal Ice Conditions in East Antarctica through Sedimentological Analyses of Core Samples", "projects": [{"proj_uid": "p0000147", "repository": "USAP-DC", "title": "Determining Middle Miocene through Pliocene Changes in Paleo Ice-flow and Basal Ice Conditions in East Antarctica through Sedimentological Analyses of Core Samples"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "ANDRILL", "south": -77.8889, "title": "Particle-size measurements for diamictites AND-2A sediment core, McMurdo Sound", "uid": "601452", "west": 167.0833}, {"awards": "0342484 Harwood, David", "bounds_geometry": ["POINT(167 -78)"], "date_created": "Mon, 14 Jun 2021 00:00:00 GMT", "description": "This dataset contains measurements of particle-size distributions on sediment from ANDRILL Site AND-2A. Carbonate, and organic matter were removed through addition of 10mL aliquots of 30% H2O2 and 2mL aliquots of 10% HCl to ~50-100mL suspension on a hot plate. Dispersion was through heating with sodium pyrophosphate. Samples were measured on a Malvern Mastersizer 2000 with a Hydro 2000MU (A) accessory, using a Refractive index of 1.544 (Quartz) and an absorption coefficient of 0.9. Results are in (vol. %) per size class, with diameter range equivalent to the diameter of spheres with the same volume as measured particles.", "east": 167.0, "geometry": ["POINT(167 -78)"], "keywords": "Andrill; Antarctica; Continental Shelf; Diamict; McMurdo Sound; Miocene; Paleoclimate; Particle Size", "locations": "McMurdo Sound; Antarctica", "north": -78.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Passchier, Sandra; Candice, Falk", "project_titles": "Collaborative Research: ANDRILL - - Investigating Antarcticas Role in Cenozoic Global Environmental Change", "projects": [{"proj_uid": "p0010297", "repository": "USAP-DC", "title": "Collaborative Research: ANDRILL - - Investigating Antarcticas Role in Cenozoic Global Environmental Change"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "ANDRILL", "south": -78.0, "title": "Particle-size measurements at 3-m intervals for AND-2A sediment core, McMurdo Sound", "uid": "601451", "west": 167.0}, {"awards": "1443347 Condron, Alan", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Tue, 08 Jun 2021 00:00:00 GMT", "description": "Meltwater and ice discharge from a retreating Antarctic Ice Sheet could have important impacts on future global climate. This dataset contains the results from multi-century (present\u20132250) climate simulations performed using a coupled numerical model integrated under future greenhouse-gas emission scenarios IPCC RCP4.5 and RCP8.5, with meltwater and ice discharge provided by a dynamic-thermodynamic ice sheet model. These results were published in Sadai et al., Science Advances, 2020, Vol. 6, eaaz1169\r\n\r\nPlease note that ALL the raw model data generated for this project is archived at Woods Hole Oceanographic Institution and the University of Massachusetts Amherst and freely available on request. ", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Meltwater", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Integrated System Science; Antarctic Ocean and Atmospheric Sciences", "persons": "Condron, Alan", "project_titles": "Collaborative Research: Assessing the Global Climate Response to Melting of the Antarctic Ice Sheet", "projects": [{"proj_uid": "p0010007", "repository": "USAP-DC", "title": "Collaborative Research: Assessing the Global Climate Response to Melting of the Antarctic Ice Sheet"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Future climate response to Antarctic Ice Sheet melt caused by anthropogenic warming", "uid": "601449", "west": -180.0}, {"awards": "1643355 Steig, Eric", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Tue, 01 Jun 2021 00:00:00 GMT", "description": "This data set contains the accumulation rates based on layer thicknesses and thinning in the supplement of Buizert et al., 2021.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Snow/ice; Snow/Ice", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Fudge, T. J.", "project_titles": "Collaborative Research: The Timing and Spatial Expression of the Bipolar Seesaw", "projects": [{"proj_uid": "p0010183", "repository": "USAP-DC", "title": "Collaborative Research: The Timing and Spatial Expression of the Bipolar Seesaw"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Layer and Thinning based Accumulation Rate Reconstructions", "uid": "601448", "west": -180.0}, {"awards": "0732946 Steffen, Konrad", "bounds_geometry": ["POLYGON((-65 -66,-64.5 -66,-64 -66,-63.5 -66,-63 -66,-62.5 -66,-62 -66,-61.5 -66,-61 -66,-60.5 -66,-60 -66,-60 -66.3,-60 -66.6,-60 -66.9,-60 -67.2,-60 -67.5,-60 -67.8,-60 -68.1,-60 -68.4,-60 -68.7,-60 -69,-60.5 -69,-61 -69,-61.5 -69,-62 -69,-62.5 -69,-63 -69,-63.5 -69,-64 -69,-64.5 -69,-65 -69,-65 -68.7,-65 -68.4,-65 -68.1,-65 -67.8,-65 -67.5,-65 -67.2,-65 -66.9,-65 -66.6,-65 -66.3,-65 -66))"], "date_created": "Wed, 19 May 2021 00:00:00 GMT", "description": "As part of IPY-0732946, three automatic weather stations (Larsen 1, 2, 3) were installed along a latitudinal gradient on the Larsen C ice shelf. The stations were installed in December 2008 (Larsen 3 AWS did not come online until 2009) and operated through the end of the project in November 2011.", "east": -60.0, "geometry": ["POINT(-62.5 -67.5)"], "keywords": "Antarctica; Atmosphere; AWS; Foehn Winds; Ice Shelf; Larsen C Ice Shelf; Larsen Ice Shelf; Meteorology; Weather Station Data", "locations": "Larsen Ice Shelf; Antarctica; Larsen C Ice Shelf", "north": -66.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "McGrath, Daniel; Bayou, Nicolas; Steffen, Konrad", "project_titles": "IPY: Stability of Larsen C Ice Shelf in a Warming Climate", "projects": [{"proj_uid": "p0000087", "repository": "USAP-DC", "title": "IPY: Stability of Larsen C Ice Shelf in a Warming Climate"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -69.0, "title": "Larsen C automatic weather station data 2008\u20132011", "uid": "601445", "west": -65.0}, {"awards": "1935901 Dugger, Katie; 0439200 Dugger, Katie; 0439759 Ballard, Grant; 0944141 Ballard, Grant; 0944411 Ainley, David; 0440643 Ainley, David; 1543541 Ainley, David; 1543498 Ballard, Grant; 1543459 Dugger, Katie; 0944358 Dugger, Katie; 1935870 Ballard, Grant", "bounds_geometry": ["POINT(166 -77)"], "date_created": "Wed, 12 May 2021 00:00:00 GMT", "description": "This project is an international collaborative investigation of geographic structuring, founding of new colonies, and population change of Adelie penguins (Pygoscelis adelia) nesting on Ross and Beaufort islands, Antarctica. This ongoing study will continue to consider the relative importance of resources that constrain or enhance colony growth (nesting habitat, access to food); the aspects of natural history that are affected by exploitative or interference competition among neighboring colonies (breeding success, foraging effort); climatic factors that influence the latter, especially sea ice patterns; and behavioral mechanisms that influence colony growth as a function of initial size and location (emigration, immigration). The research includes a census of known-age penguins, studies of foraging effort and overlap among colonies; and identification of the location of molting and wintering areas. ", "east": 166.0, "geometry": ["POINT(166 -77)"], "keywords": "Adelie Penguin; Antarctica; Biota; Demography; Mark-Recapture; Monitoring; Penguin; Ross Island", "locations": "Antarctica; Ross Island", "north": -77.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Ballard, Grant", "project_titles": "A Full Lifecycle Approach to Understanding Ad\u00e9lie Penguin Response to Changing Pack Ice Conditions in the Ross Sea.; COLLABORATIVE: Adelie Penguin Response to Climate Change at the Individual, Colony and Metapopulation Levels; COLLABORATIVE: Geographic Structure of Adelie Penguin Colonies - Demography of Population Change; Population Growth at the Southern Extreme: Effects of Early Life Conditions on Adelie penguin Individuals and Colonies", "projects": [{"proj_uid": "p0010179", "repository": "USAP-DC", "title": "Population Growth at the Southern Extreme: Effects of Early Life Conditions on Adelie penguin Individuals and Colonies"}, {"proj_uid": "p0010177", "repository": "USAP-DC", "title": "A Full Lifecycle Approach to Understanding Ad\u00e9lie Penguin Response to Changing Pack Ice Conditions in the Ross Sea."}, {"proj_uid": "p0000318", "repository": "USAP-DC", "title": "COLLABORATIVE: Adelie Penguin Response to Climate Change at the Individual, Colony and Metapopulation Levels"}, {"proj_uid": "p0000068", "repository": "USAP-DC", "title": "COLLABORATIVE: Geographic Structure of Adelie Penguin Colonies - Demography of Population Change"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.0, "title": "Adelie penguin resighting data 1997-2021 from the California Avian Data Center hosted by Point Reyes Bird Observatory Conservation Science", "uid": "601444", "west": 166.0}, {"awards": "0439759 Ballard, Grant; 0944141 Ballard, Grant; 1543498 Ballard, Grant; 1543459 Dugger, Katie; 1543541 Ainley, David", "bounds_geometry": ["POINT(166 -77)"], "date_created": "Tue, 11 May 2021 00:00:00 GMT", "description": "This project is an international collaborative investigation of geographic structuring, founding of new colonies, and population change of Adelie penguins (Pygoscelis adelia) nesting on Ross and Beaufort islands, Antarctica. This ongoing study will continue to consider the relative importance of resources that constrain or enhance colony growth (nesting habitat, access to food); the aspects of natural history that are affected by exploitative or interference competition among neighboring colonies (breeding success, foraging effort); climatic factors that influence the latter, especially sea ice patterns; and behavioral mechanisms that influence colony growth as a function of initial size and location (emigration, immigration). The research includes a census of known-age penguins, studies of foraging effort and overlap among colonies; and identification of the location of molting and wintering areas. ", "east": 166.0, "geometry": ["POINT(166 -77)"], "keywords": "Adelie Penguin; Antarctica; Biota; Demography; Penguin; Ross Sea; Seabirds", "locations": "Antarctica; Ross Sea", "north": -77.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems; Antarctic Instrumentation and Support; Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "Ballard, Grant", "project_titles": "A Full Lifecycle Approach to Understanding Ad\u00e9lie Penguin Response to Changing Pack Ice Conditions in the Ross Sea.; COLLABORATIVE: Geographic Structure of Adelie Penguin Colonies - Demography of Population Change", "projects": [{"proj_uid": "p0000068", "repository": "USAP-DC", "title": "COLLABORATIVE: Geographic Structure of Adelie Penguin Colonies - Demography of Population Change"}, {"proj_uid": "p0010177", "repository": "USAP-DC", "title": "A Full Lifecycle Approach to Understanding Ad\u00e9lie Penguin Response to Changing Pack Ice Conditions in the Ross Sea."}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.0, "title": "Adelie penguin banding data 1994-2021 from the California Avian Data Center hosted by Point Reyes Bird Observatory Conservation Science", "uid": "601443", "west": 166.0}, {"awards": "1543377 Seefeldt, Mark; 1543325 Landolt, Scott", "bounds_geometry": ["POLYGON((166.918 -77.877,167.2997 -77.877,167.6814 -77.877,168.0631 -77.877,168.4448 -77.877,168.8265 -77.877,169.2082 -77.877,169.5899 -77.877,169.9716 -77.877,170.3533 -77.877,170.735 -77.877,170.735 -77.99,170.735 -78.103,170.735 -78.216,170.735 -78.329,170.735 -78.442,170.735 -78.555,170.735 -78.668,170.735 -78.781,170.735 -78.894,170.735 -79.007,170.3533 -79.007,169.9716 -79.007,169.5899 -79.007,169.2082 -79.007,168.8265 -79.007,168.4448 -79.007,168.0631 -79.007,167.6814 -79.007,167.2997 -79.007,166.918 -79.007,166.918 -78.894,166.918 -78.781,166.918 -78.668,166.918 -78.555,166.918 -78.442,166.918 -78.329,166.918 -78.216,166.918 -78.103,166.918 -77.99,166.918 -77.877))"], "date_created": "Tue, 04 May 2021 00:00:00 GMT", "description": "The dataset includes precipitation and associated observations at four sites across the northwest Ross Ice Shelf from December 2017 to November 2019. The general instruments at each site include precipitation gauge - installed inside a wind shield, anemometer, thermometer, sonic ranging sensor, optical particle detector, laser disdrometer, shortwave and longwave radiation sensors, and a field camera. The observations from each site include: precipitation (liquid water equivalent), temperature, wind speed, snow surface height, particle count, particle size and speed, upward/downward longwave radiation, upward/downward shortwave radiation, still image photos, and 5-second movies. The data are in comma-delimited text files, jpg photos, and mp4 movies. png plots of the quality-controlled observations are included for quick views of the data.", "east": 170.735, "geometry": ["POINT(168.8265 -78.442)"], "keywords": "Accumulation; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Meteorology; Precipitation; Ross Ice Shelf; Snow; Snow/ice; Snow/Ice; Weatherstation; Weather Station Data", "locations": "Ross Ice Shelf; Antarctica", "north": -77.877, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences; Antarctic Ocean and Atmospheric Sciences", "persons": "Seefeldt, Mark", "project_titles": "Collaborative Research: Implementing Low-power, Autonomous Observing Systems to Improve the Measurement and Understanding of Antarctic Precipitation", "projects": [{"proj_uid": "p0010173", "repository": "USAP-DC", "title": "Collaborative Research: Implementing Low-power, Autonomous Observing Systems to Improve the Measurement and Understanding of Antarctic Precipitation"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.007, "title": "Precipitation Observations for the Northwest Ross Ice Shelf - 2017-12 to 2019-11", "uid": "601441", "west": 166.918}, {"awards": "1443347 Condron, Alan", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Tue, 04 May 2021 00:00:00 GMT", "description": "This dataset contains the MITgcm model output data presented in Ashley, K.E. et al., 2021. This dataset includes simulated spatial changes in sea surface salinity (SSS), time series data of salinity, and scatter plot data of SSS changes against meltwater discharge.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Computer Model; Freshwater; Glaciers/ice Sheet; Glaciers/Ice Sheet; Model Data; Ocean Model; Oceans; Salinity", "locations": "Antarctica; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Condron, Alan", "project_titles": "Collaborative Research: Assessing the Global Climate Response to Melting of the Antarctic Ice Sheet", "projects": [{"proj_uid": "p0010007", "repository": "USAP-DC", "title": "Collaborative Research: Assessing the Global Climate Response to Melting of the Antarctic Ice Sheet"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Simulated changes in Southern Ocean salinity", "uid": "601442", "west": -180.0}, {"awards": "1143836 Leventer, Amy", "bounds_geometry": ["POLYGON((120 -66,120.1 -66,120.2 -66,120.3 -66,120.4 -66,120.5 -66,120.6 -66,120.7 -66,120.8 -66,120.9 -66,121 -66,121 -66.1,121 -66.2,121 -66.3,121 -66.4,121 -66.5,121 -66.6,121 -66.7,121 -66.8,121 -66.9,121 -67,120.9 -67,120.8 -67,120.7 -67,120.6 -67,120.5 -67,120.4 -67,120.3 -67,120.2 -67,120.1 -67,120 -67,120 -66.9,120 -66.8,120 -66.7,120 -66.6,120 -66.5,120 -66.4,120 -66.3,120 -66.2,120 -66.1,120 -66))"], "date_created": "Tue, 27 Apr 2021 00:00:00 GMT", "description": "This dataset includes diatom data, both absolute abundance and relative contribution, for NBP1402 JPC43. ", "east": 121.0, "geometry": ["POINT(120.5 -66.5)"], "keywords": "Antarctica; Diatom; Holocene; Jumbo Piston Corer; NBP1402; R/v Nathaniel B. Palmer; Sabrina Coast; Sediment Core Data; Species Abundance; Totten Glacier", "locations": "Antarctica; Sabrina Coast; Totten Glacier", "north": -66.0, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Leventer, Amy", "project_titles": "Collaborative Research: Totten Glacier System and the Marine Record of Cryosphere - Ocean Dynamics", "projects": [{"proj_uid": "p0000008", "repository": "USAP-DC", "title": "Collaborative Research: Totten Glacier System and the Marine Record of Cryosphere - Ocean Dynamics"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -67.0, "title": "NBP1402 JPC43 Diatom Data", "uid": "601440", "west": 120.0}, {"awards": "0636719 Joughin, Ian; 0636970 Tulaczyk, Slawek", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Wed, 21 Apr 2021 00:00:00 GMT", "description": "This data set contains lake boundaries, volume changes, and gridded elevations for 124 active subglacial lakes beneath the Antarctic ice sheet. Lakes were identified using laser altimetry data obtained from 2003 to 2009 by NASA\u0027s Ice, Cloud, and Land Elevation Satellite (ICESat) mission. The data are provided in Keyhole Markup Language (KML), comma-separated values (CSV), and GEOTiff formats.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Altimetry; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Icesat; Laser Altimetry; Subglacial Lake", "locations": "Antarctica; Antarctica", "north": -60.0, "nsf_funding_programs": null, "persons": "Smith, Ben; Joughin, Ian; Tulaczyk, Slawek; Fricker, Helen", "project_titles": "Collaborative Research: Elevation Change Anomalies in West Antarctica and Dynamics of Subglacial Water Transport Beneath Ice Streams and their Tributaries", "projects": [{"proj_uid": "p0000115", "repository": "USAP-DC", "title": "Collaborative Research: Elevation Change Anomalies in West Antarctica and Dynamics of Subglacial Water Transport Beneath Ice Streams and their Tributaries"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Antarctic Active Subglacial Lake Inventory from ICESat Altimetry", "uid": "601439", "west": -180.0}, {"awards": "0636875 Halzen, Francis", "bounds_geometry": null, "date_created": "Mon, 12 Apr 2021 00:00:00 GMT", "description": "The following is a list of neutrino candidate events recorded by the AMANDA-II neutrino telescope during the period 2000-2006. The events are mostly from atmospheric neutrinos with a typical energy of several hundred GeV. The events include a small fraction of misreconstructed cosmic ray muon tracks, and this contamination increases near the horizon. ", "east": null, "geometry": null, "keywords": "Amanda-ii; Antarctica; Neutrino; Neutrino Candidate Events; Neutrino Telescope; South Pole", "locations": "South Pole; Antarctica", "north": null, "nsf_funding_programs": "Antarctic Astrophysics and Geospace Sciences", "persons": "Halzen, Francis; Riedel, Benedikt", "project_titles": "Management and Operations of the IceCube Neutrino Observatory 2021-2026", "projects": [{"proj_uid": "p0010168", "repository": "USAP-DC", "title": "Management and Operations of the IceCube Neutrino Observatory 2021-2026"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "IceCube", "south": null, "title": "Amanda 7 Year Data Set", "uid": "601438", "west": null}, {"awards": "1443690 Young, Duncan", "bounds_geometry": ["POLYGON((-180 -86,-176.5 -86,-173 -86,-169.5 -86,-166 -86,-162.5 -86,-159 -86,-155.5 -86,-152 -86,-148.5 -86,-145 -86,-145 -86.4,-145 -86.8,-145 -87.2,-145 -87.6,-145 -88,-145 -88.4,-145 -88.8,-145 -89.2,-145 -89.6,-145 -90,-148.5 -90,-152 -90,-155.5 -90,-159 -90,-162.5 -90,-166 -90,-169.5 -90,-173 -90,-176.5 -90,180 -90,174.2 -90,168.4 -90,162.6 -90,156.8 -90,151 -90,145.2 -90,139.4 -90,133.6 -90,127.8 -90,122 -90,122 -89.6,122 -89.2,122 -88.8,122 -88.4,122 -88,122 -87.6,122 -87.2,122 -86.8,122 -86.4,122 -86,127.8 -86,133.6 -86,139.4 -86,145.2 -86,151 -86,156.8 -86,162.6 -86,168.4 -86,174.2 -86,-180 -86))"], "date_created": "Fri, 02 Apr 2021 00:00:00 GMT", "description": "Level 2 aerogeophysical data, derived from the HiCARS2 radar system and laser altimeter for the Titan Dome region of East Antarctica. The observations included are geo-referenced surface elevation, bed elevation, ice thickness, bed reflectivity, surface reflectivity, and dated internal reflecting horizon depths.", "east": -145.0, "geometry": ["POINT(168.5 -88)"], "keywords": "Airborne Laser Altimetry; Airborne Radar; Airplane; Antarctica; Bedrock Elevation; East Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Thickness; Radar Echo Sounder; Surface Elevation; Titan Dome", "locations": "Antarctica; East Antarctica; Titan Dome", "north": -86.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Beem, Lucas H.; Young, Duncan A.; Greenbaum, Jamin; Ng, Gregory; Blankenship, Donald D.; Cavitte, Marie G. P; Jingxue, Guo; Bo, Sun; Young, Duncan", "project_titles": "Collaborative Research: Southern Plateau Ice-sheet Characterization and Evolution of the Central Antarctic Plate (SPICECAP)", "projects": [{"proj_uid": "p0010115", "repository": "USAP-DC", "title": "Collaborative Research: Southern Plateau Ice-sheet Characterization and Evolution of the Central Antarctic Plate (SPICECAP)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Titan Dome, East Antarctica, Aerogeophysical Survey", "uid": "601437", "west": 122.0}, {"awards": "1745137 Schroeder, Dustin", "bounds_geometry": ["POLYGON((-130 -72.9,-125.27 -72.9,-120.54 -72.9,-115.81 -72.9,-111.08 -72.9,-106.35 -72.9,-101.62 -72.9,-96.89 -72.9,-92.16 -72.9,-87.43 -72.9,-82.7 -72.9,-82.7 -73.76,-82.7 -74.62,-82.7 -75.48,-82.7 -76.34,-82.7 -77.2,-82.7 -78.06,-82.7 -78.92,-82.7 -79.78,-82.7 -80.64,-82.7 -81.5,-87.43 -81.5,-92.16 -81.5,-96.89 -81.5,-101.62 -81.5,-106.35 -81.5,-111.08 -81.5,-115.81 -81.5,-120.54 -81.5,-125.27 -81.5,-130 -81.5,-130 -80.64,-130 -79.78,-130 -78.92,-130 -78.06,-130 -77.2,-130 -76.34,-130 -75.48,-130 -74.62,-130 -73.76,-130 -72.9))"], "date_created": "Fri, 05 Mar 2021 00:00:00 GMT", "description": "The dataset contains radargrams from the 2004-2005 airborne radar sounding surveys on Pine Island Glacier and Thwaites Glacier as part of the BBAS and AGASEA projects. It also includes basal reflectivity and one-way attenuation rates derived from these radargrams. Radar data from the Pine Island Ice Shelf inland to the Bentley Sublglacial Trench were collected by the British Antarctica Survey (BAS) with the Polarimetric-radar Airborne Science INstrument (PASIN) radar sounder, operating at a center frequency of 150 MHz and 15 MHz bandwidth. Data over Thwaites Glacier were collected by the University of Texas Institute for Geophysics (UTIG) High Capability Airborne Radar Sounder (HiCARS) operating at a center frequency of 60 MHz with 15 MHz of bandwidth. Data are provided as 50km segments in NetCDF files, along with kml location files, and pdf files for browsing radargrams images by flight transect. Details of the processing methods are included in the associated README file. The processed data sets (reflectivity and attenuation) are provided as a single NetCDF file for each flight transect. Details of the calibration and processing procedures are provided in Chu, et al (in review).", "east": -82.7, "geometry": ["POINT(-106.35 -77.2)"], "keywords": "Amundsen Sea; Antarctica; Bed Reflectivity; Ice Penetrating Radar; Radar Echo Sounder", "locations": "Amundsen Sea; Antarctica", "north": -72.9, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Chu, Winnie; Hilger, Andrew M.; Culberg, Riley; Schroeder, Dustin; Jordan, Thomas M.; Seroussi, Helene; Young, Duncan A.; Vaughan, David G.", "project_titles": "CAREER: Cross-Instrument Synthesis of Antarctic Radar Sounding Observations", "projects": [{"proj_uid": "p0010058", "repository": "USAP-DC", "title": "CAREER: Cross-Instrument Synthesis of Antarctic Radar Sounding Observations"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -81.5, "title": "Radar Sounding Observations of the Amundsen Sea Embayment, 2004-2005", "uid": "601436", "west": -130.0}, {"awards": "1543539 Liwanag, Heather", "bounds_geometry": ["POINT(166 -77)"], "date_created": "Fri, 26 Feb 2021 00:00:00 GMT", "description": "This dataset contains dive records from 18 Weddell seal pups collected during 2017 and 2019. Additionally, there are weather data taken during the same time period from a temporary weather station at Turtle Rock.", "east": 166.0, "geometry": ["POINT(166 -77)"], "keywords": "Antarctica; McMurdo Sound; Weddell Seal", "locations": "Antarctica; McMurdo Sound", "north": -77.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Pearson, Linnea; Weitzner, Emma; Liwanag, Heather", "project_titles": "RUI: Growing Up on Ice: Physiological Adaptations and Developmental Plasticity in Weddell Seal Pups Across Two Extreme Physical Environments", "projects": [{"proj_uid": "p0010144", "repository": "USAP-DC", "title": "RUI: Growing Up on Ice: Physiological Adaptations and Developmental Plasticity in Weddell Seal Pups Across Two Extreme Physical Environments"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.0, "title": "TDR and weather data", "uid": "601435", "west": 166.0}, {"awards": "0440670 Hulbe, Christina", "bounds_geometry": ["POLYGON((-180 -77,-177 -77,-174 -77,-171 -77,-168 -77,-165 -77,-162 -77,-159 -77,-156 -77,-153 -77,-150 -77,-150 -77.9,-150 -78.8,-150 -79.7,-150 -80.6,-150 -81.5,-150 -82.4,-150 -83.3,-150 -84.2,-150 -85.1,-150 -86,-153 -86,-156 -86,-159 -86,-162 -86,-165 -86,-168 -86,-171 -86,-174 -86,-177 -86,180 -86,177.5 -86,175 -86,172.5 -86,170 -86,167.5 -86,165 -86,162.5 -86,160 -86,157.5 -86,155 -86,155 -85.1,155 -84.2,155 -83.3,155 -82.4,155 -81.5,155 -80.6,155 -79.7,155 -78.8,155 -77.9,155 -77,157.5 -77,160 -77,162.5 -77,165 -77,167.5 -77,170 -77,172.5 -77,175 -77,177.5 -77,-180 -77))"], "date_created": "Fri, 19 Feb 2021 00:00:00 GMT", "description": "The surface of the Ross Ice Shelf (RIS) is textured by flow stripes, crevasses and other fea- tures related to ice flow and deformation. Here, moderate resolution optical satellite images are used to map and classify regions of the RIS characterized by different surface textures. Because the textures arise from ice deformation, the map is used to identify structural provinces with common deformation history. We classify four province types: regions associated with large outlet glaciers, shear zones, exten- sion downstream of obstacles and suture zones between provinces with different upstream sources. Adjacent provinces with contrasting histories are in some locations deforming at different rates, suggest- ing that our province map is also an ice fabric map. Structural provinces have more complicated shapes in the part of the ice shelf fed by West Antarctic ice streams than in the part fed by outlet glaciers from the Transantarctic Mountains. The map may be used to infer past variations in stress conditions and flow events that cannot be inferred from flow traces alone.", "east": 155.0, "geometry": ["POINT(-177.5 -81.5)"], "keywords": "Antarctica", "locations": "Antarctica", "north": -77.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Hulbe, Christina; Ledoux, Christine; Forbes, Martin", "project_titles": "Collaborative Research: Using Fracture Patterns and Ice Thickness to Study the History and Dynamics of Grounding Line Migration and Shutdown of Kamb and Whillans Ice Streams", "projects": [{"proj_uid": "p0000096", "repository": "USAP-DC", "title": "Collaborative Research: Using Fracture Patterns and Ice Thickness to Study the History and Dynamics of Grounding Line Migration and Shutdown of Kamb and Whillans Ice Streams"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -86.0, "title": "MOA-derived Structural Feature Map of the Ross Ice Shelf", "uid": "601432", "west": -150.0}, {"awards": "1443448 Schaefer, Joerg; 1443144 Steig, Eric", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Wed, 03 Feb 2021 00:00:00 GMT", "description": "Experiments were conducted using ECHAM5-HAM atmospheric aerosol - climate model at horizontal resolution of T42 (~2.8\u00b0 latitude \u00d7 2.8\u00b0 longitude) with 19 vertical levels to examine the relationship between the production of 10Be in the atmosphere and its deposition at the surface. Five experiments were conducted, using a) constant 10Be production but varying, observed climate b) climatological climate of the last 50 years but varying 10Be production, c) constant 10Be production with 50-years of varying climate for 0 ka, (d) 6 ka, and (e) 21 ka, using the TraCE21 simulation to provide boundary conditions. The results will be useful for comparison with 10Be concentration records obtained from the South Pole ice core and other Antarctic and Greenland records.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; South Pole", "locations": "Antarctica; South Pole; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Ding, Qinghua; Schaefer, Joerg; Steig, Eric J.", "project_titles": "Collaborative Research: A High-sensitivity Beryllium-10 Record from an Ice Core at South Pole", "projects": [{"proj_uid": "p0010158", "repository": "USAP-DC", "title": "Collaborative Research: A High-sensitivity Beryllium-10 Record from an Ice Core at South Pole"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -90.0, "title": "Simulations of 10Be over Antarctica", "uid": "601431", "west": -180.0}, {"awards": "1443663 Cole-Dai, Jihong", "bounds_geometry": ["POLYGON((-180 -89.99,-152.184 -89.99,-124.368 -89.99,-96.552 -89.99,-68.736 -89.99,-40.92 -89.99,-13.104 -89.99,14.712 -89.99,42.528 -89.99,70.344 -89.99,98.16 -89.99,98.16 -89.99,98.16 -89.99,98.16 -89.99,98.16 -89.99,98.16 -89.99,98.16 -89.99,98.16 -89.99,98.16 -89.99,98.16 -89.99,98.16 -89.99,70.344 -89.99,42.528 -89.99,14.712 -89.99,-13.104 -89.99,-40.92 -89.99,-68.736 -89.99,-96.552 -89.99,-124.368 -89.99,-152.184 -89.99,180 -89.99,152.184 -89.99,124.368 -89.99,96.552 -89.99,68.736 -89.99,40.92 -89.99,13.104 -89.99,-14.712 -89.99,-42.528 -89.99,-70.344 -89.99,-98.16 -89.99,-98.16 -89.99,-98.16 -89.99,-98.16 -89.99,-98.16 -89.99,-98.16 -89.99,-98.16 -89.99,-98.16 -89.99,-98.16 -89.99,-98.16 -89.99,-98.16 -89.99,-70.344 -89.99,-42.528 -89.99,-14.712 -89.99,13.104 -89.99,40.92 -89.99,68.736 -89.99,96.552 -89.99,124.368 -89.99,152.184 -89.99,-180 -89.99))"], "date_created": "Sat, 30 Jan 2021 00:00:00 GMT", "description": "Major ion concentrations in SPICEcore samples from the section of 400-480 m were measured with ion chromatography. The ions are chloride, nitrate, sulfate, sodium, potassium, magnesium, and calcium.\r\nThis section was analyzed to replicate the measurement of the same section at Dartmouth College.", "east": -98.16, "geometry": ["POINT(-180 -89.99)"], "keywords": "Antarctica; Ions; South Pole; SPICEcore", "locations": "South Pole; Antarctica", "north": -89.99, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Cole-Dai, Jihong; Larrick, Carleigh", "project_titles": "Collaborative Research: South Pole Ice Core Chronology and Climate Records using Chemical and Microparticle Measurements", "projects": [{"proj_uid": "p0010051", "repository": "USAP-DC", "title": "Collaborative Research: South Pole Ice Core Chronology and Climate Records using Chemical and Microparticle Measurements"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -89.99, "title": "SPICEcore 400-480 m Major Ions SDSU", "uid": "601430", "west": 98.16}, {"awards": "1643684 Saito, Mak", "bounds_geometry": ["POLYGON((-180 -70,-173.5 -70,-167 -70,-160.5 -70,-154 -70,-147.5 -70,-141 -70,-134.5 -70,-128 -70,-121.5 -70,-115 -70,-115 -70.8,-115 -71.6,-115 -72.4,-115 -73.2,-115 -74,-115 -74.8,-115 -75.6,-115 -76.4,-115 -77.2,-115 -78,-121.5 -78,-128 -78,-134.5 -78,-141 -78,-147.5 -78,-154 -78,-160.5 -78,-167 -78,-173.5 -78,180 -78,179.2 -78,178.4 -78,177.6 -78,176.8 -78,176 -78,175.2 -78,174.4 -78,173.6 -78,172.8 -78,172 -78,172 -77.2,172 -76.4,172 -75.6,172 -74.8,172 -74,172 -73.2,172 -72.4,172 -71.6,172 -70.8,172 -70,172.8 -70,173.6 -70,174.4 -70,175.2 -70,176 -70,176.8 -70,177.6 -70,178.4 -70,179.2 -70,-180 -70))"], "date_created": "Wed, 20 Jan 2021 00:00:00 GMT", "description": "Nutrient from Amundsen Sea Ross Sea and Terra Nova Bay. Parameters include phosphate, N+N (nitrate + nitrite), silicic acid, nitrite and ammonia. Measured by Joe Jennings (OSU) using protocols described by Noble et al., 2012 (Limnol. Oceanogr.). Trace metal rosette CTD sensor data also included for bottle depths. ", "east": 172.0, "geometry": ["POINT(-151.5 -74)"], "keywords": "Amundsen Sea; Antarctica; NBP1801; Nitrate; Nitrite; Nutrients; Phosphate; Ross Sea; R/v Nathaniel B. Palmer; Silicic Acid; Terra Nova Bay", "locations": "Amundsen Sea; Antarctica; Ross Sea; Terra Nova Bay", "north": -70.0, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Saito, Mak", "project_titles": "Collaborative Research: Cobalamin and Iron Co-Limitation Of Phytoplankton Species in Terra Nova Bay", "projects": [{"proj_uid": "p0010045", "repository": "USAP-DC", "title": "Collaborative Research: Cobalamin and Iron Co-Limitation Of Phytoplankton Species in Terra Nova Bay"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Nutrients from NBP18-01 CICLOPS", "uid": "601428", "west": -115.0}, {"awards": null, "bounds_geometry": null, "date_created": "Wed, 20 Jan 2021 00:00:00 GMT", "description": "Weather summary readings from the Antarctic Meteorological Research Center at Shackleton Glacier Weather Station from January 2002", "east": null, "geometry": null, "keywords": "Antarctica; Shackleton Glacier", "locations": "Shackleton Glacier; Antarctica", "north": null, "nsf_funding_programs": null, "persons": "Noojin, Matthew", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": null, "title": "Shackleton Weather Station Data (Jan. 2002)", "uid": "601427", "west": null}, {"awards": null, "bounds_geometry": null, "date_created": "Wed, 20 Jan 2021 00:00:00 GMT", "description": "Monthly climatology data from 2002 recorded at McMurdo Weather Station.", "east": null, "geometry": null, "keywords": "Antarctica; McMurdo", "locations": "Antarctica; McMurdo", "north": null, "nsf_funding_programs": null, "persons": "Noojin, Matthew", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": null, "title": "McMurdo Weather Station Climatology Data (2002)", "uid": "601426", "west": null}, {"awards": "1443263 Higgins, John; 1443276 Brook, Edward J.", "bounds_geometry": ["POLYGON((159 -75.67,159.025 -75.67,159.05 -75.67,159.075 -75.67,159.1 -75.67,159.125 -75.67,159.15 -75.67,159.175 -75.67,159.2 -75.67,159.225 -75.67,159.25 -75.67,159.25 -75.786,159.25 -75.902,159.25 -76.018,159.25 -76.134,159.25 -76.25,159.25 -76.366,159.25 -76.482,159.25 -76.598,159.25 -76.714,159.25 -76.83,159.225 -76.83,159.2 -76.83,159.175 -76.83,159.15 -76.83,159.125 -76.83,159.1 -76.83,159.075 -76.83,159.05 -76.83,159.025 -76.83,159 -76.83,159 -76.714,159 -76.598,159 -76.482,159 -76.366,159 -76.25,159 -76.134,159 -76.018,159 -75.902,159 -75.786,159 -75.67))"], "date_created": "Wed, 20 Jan 2021 00:00:00 GMT", "description": "This file includes the concentration of carbon dioxide (CO2) and methane (CH4) in the trapped air from the S27 ice core collected in Allan Hills Blue Ice Area.", "east": 159.25, "geometry": ["POINT(159.125 -76.25)"], "keywords": "Allan Hills; Antarctica; Blue Ice; Carbon Dioxide; Ice Core; Methane", "locations": "Antarctica; Antarctica; Allan Hills", "north": -75.67, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Yan, Yuzhen; Brook, Edward J.", "project_titles": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area", "projects": [{"proj_uid": "p0000760", "repository": "USAP-DC", "title": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.83, "title": "Greenhouse gas composition in the Allan Hills S27 ice core", "uid": "601425", "west": 159.0}, {"awards": "1643795 Mikesell, Thomas", "bounds_geometry": ["POLYGON((-134.5 -75,-130.85 -75,-127.2 -75,-123.55 -75,-119.9 -75,-116.25 -75,-112.6 -75,-108.95 -75,-105.3 -75,-101.65 -75,-98 -75,-98 -75.85,-98 -76.7,-98 -77.55,-98 -78.4,-98 -79.25,-98 -80.1,-98 -80.95,-98 -81.8,-98 -82.65,-98 -83.5,-101.65 -83.5,-105.3 -83.5,-108.95 -83.5,-112.6 -83.5,-116.25 -83.5,-119.9 -83.5,-123.55 -83.5,-127.2 -83.5,-130.85 -83.5,-134.5 -83.5,-134.5 -82.65,-134.5 -81.8,-134.5 -80.95,-134.5 -80.1,-134.5 -79.25,-134.5 -78.4,-134.5 -77.55,-134.5 -76.7,-134.5 -75.85,-134.5 -75))"], "date_created": "Fri, 15 Jan 2021 00:00:00 GMT", "description": "This data set includes observations of Rayleigh and Love wave group and phase velocity dispersion curves from ambient noise crosscorrelation functions. The data set includes the corresponding shear wave velocity model produced by joint inversion of these dispersion curves. This investigators developed a new crust and upper mantle model directly beneath the seismic stations used in this study. Data are in NetCDF and GeoCSV formats. The Python code used to generate the NetCDF files from the GeoCSV files is also contained in the data set.", "east": -98.0, "geometry": ["POINT(-116.25 -79.25)"], "keywords": "Antarctica; Crust; Moho; Seismic Tomography; Seismology; Seismometer; Shear Wave Velocity; Surface Wave Dispersion; West Antarctica", "locations": "Antarctica; West Antarctica", "north": -75.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Mikesell, Dylan", "project_titles": "Collaborative Research: Monitoring Antarctic Ice Sheet Changes with Ambient Seismic Noise Methods", "projects": [{"proj_uid": "p0010155", "repository": "USAP-DC", "title": "Collaborative Research: Monitoring Antarctic Ice Sheet Changes with Ambient Seismic Noise Methods"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "POLENET", "south": -83.5, "title": "2D shear-wave velocity model across the West Antarctic Rift System from POLENET-ANET seismic data", "uid": "601423", "west": -134.5}, {"awards": "1341606 Stammerjohn, Sharon", "bounds_geometry": ["POLYGON((-180 -59.9,-179.53 -59.9,-179.06 -59.9,-178.59 -59.9,-178.12 -59.9,-177.65 -59.9,-177.18 -59.9,-176.71 -59.9,-176.24 -59.9,-175.77 -59.9,-175.3 -59.9,-175.3 -61.68,-175.3 -63.46,-175.3 -65.24,-175.3 -67.02,-175.3 -68.8,-175.3 -70.58,-175.3 -72.36,-175.3 -74.14,-175.3 -75.92,-175.3 -77.7,-175.77 -77.7,-176.24 -77.7,-176.71 -77.7,-177.18 -77.7,-177.65 -77.7,-178.12 -77.7,-178.59 -77.7,-179.06 -77.7,-179.53 -77.7,180 -77.7,178.36 -77.7,176.72 -77.7,175.08 -77.7,173.44 -77.7,171.8 -77.7,170.16 -77.7,168.52 -77.7,166.88 -77.7,165.24 -77.7,163.6 -77.7,163.6 -75.92,163.6 -74.14,163.6 -72.36,163.6 -70.58,163.6 -68.8,163.6 -67.02,163.6 -65.24,163.6 -63.46,163.6 -61.68,163.6 -59.9,165.24 -59.9,166.88 -59.9,168.52 -59.9,170.16 -59.9,171.8 -59.9,173.44 -59.9,175.08 -59.9,176.72 -59.9,178.36 -59.9,-180 -59.9))"], "date_created": "Tue, 12 Jan 2021 00:00:00 GMT", "description": "Ocean profile data from a SeaBird SBE 911plus CTD package deployed on the NBP1704 PIPERS cruise in the Ross Sea (Apr 11 to Jun 10, 2017). ", "east": 163.6, "geometry": ["POINT(174.15 -68.8)"], "keywords": "Antarctica; CTD; CTD Data; NBP1704; Ocean Profile Data; Ross Sea; R/v Nathaniel B. Palmer; Salinity; Temperature", "locations": "Ross Sea; Antarctica", "north": -59.9, "nsf_funding_programs": "Antarctic Instrumentation and Support", "persons": "Stammerjohn, Sharon", "project_titles": "Collaborative Research: Seasonal Sea Ice Production in the Ross Sea, Antarctica", "projects": [{"proj_uid": "p0010032", "repository": "USAP-DC", "title": "Collaborative Research: Seasonal Sea Ice Production in the Ross Sea, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.7, "title": "NBP1704 CTD sensor data", "uid": "601422", "west": -175.3}, {"awards": "1341631 Lyons, W. Berry; 1341736 Adams, Byron", "bounds_geometry": ["POLYGON((-177.4099 -84.4661,-177.08229 -84.4661,-176.75468 -84.4661,-176.42707 -84.4661,-176.09946 -84.4661,-175.77185 -84.4661,-175.44424 -84.4661,-175.11663 -84.4661,-174.78902 -84.4661,-174.46141 -84.4661,-174.1338 -84.4661,-174.1338 -84.56828,-174.1338 -84.67046,-174.1338 -84.77264,-174.1338 -84.87482,-174.1338 -84.977,-174.1338 -85.07918,-174.1338 -85.18136,-174.1338 -85.28354,-174.1338 -85.38572,-174.1338 -85.4879,-174.46141 -85.4879,-174.78902 -85.4879,-175.11663 -85.4879,-175.44424 -85.4879,-175.77185 -85.4879,-176.09946 -85.4879,-176.42707 -85.4879,-176.75468 -85.4879,-177.08229 -85.4879,-177.4099 -85.4879,-177.4099 -85.38572,-177.4099 -85.28354,-177.4099 -85.18136,-177.4099 -85.07918,-177.4099 -84.977,-177.4099 -84.87482,-177.4099 -84.77264,-177.4099 -84.67046,-177.4099 -84.56828,-177.4099 -84.4661))"], "date_created": "Sun, 03 Jan 2021 00:00:00 GMT", "description": "We collected soil surface samples (n = 21) and depth profiles (n = 25) every 5 cm to refusal (up to 30 cm) from eleven ice-free areas along the Shackleton Glacier, a major outlet glacier of the East Antarctic Ice Sheet (EAIS). We measured meteoric 10Be concentrations, which were later used to estimate relative surface exposure ages of the soils from seven locations. ", "east": -174.1338, "geometry": ["POINT(-175.77185 -84.977)"], "keywords": "Antarctica; Be-10; Beryllium-10; Cosmogenic Radionuclides; Geochemistry; Geomorphology; Shackleton Glacier; Surface Exposure Dates", "locations": "Antarctica; Shackleton Glacier", "north": -84.4661, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "Diaz, Melisa A.", "project_titles": "Collaborative Research: The Role of Glacial History on the Structure and Functioning of Ecological Communities in the Shackleton Glacier Region of the Transantarctic Mountains", "projects": [{"proj_uid": "p0010140", "repository": "USAP-DC", "title": "Collaborative Research: The Role of Glacial History on the Structure and Functioning of Ecological Communities in the Shackleton Glacier Region of the Transantarctic Mountains"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -85.4879, "title": "Meteoric 10Be data of soils from the Shackleton Glacier region", "uid": "601421", "west": -177.4099}, {"awards": "1644196 Cziko, Paul", "bounds_geometry": ["POLYGON((162.647931 -77.000624,163.049652 -77.000624,163.451373 -77.000624,163.853094 -77.000624,164.254815 -77.000624,164.656536 -77.000624,165.058257 -77.000624,165.459978 -77.000624,165.861699 -77.000624,166.26342 -77.000624,166.665141 -77.000624,166.665141 -77.0856883,166.665141 -77.1707526,166.665141 -77.2558169,166.665141 -77.3408812,166.665141 -77.4259455,166.665141 -77.5110098,166.665141 -77.5960741,166.665141 -77.6811384,166.665141 -77.7662027,166.665141 -77.851267,166.26342 -77.851267,165.861699 -77.851267,165.459978 -77.851267,165.058257 -77.851267,164.656536 -77.851267,164.254815 -77.851267,163.853094 -77.851267,163.451373 -77.851267,163.049652 -77.851267,162.647931 -77.851267,162.647931 -77.7662027,162.647931 -77.6811384,162.647931 -77.5960741,162.647931 -77.5110098,162.647931 -77.4259455,162.647931 -77.3408812,162.647931 -77.2558169,162.647931 -77.1707526,162.647931 -77.0856883,162.647931 -77.000624))"], "date_created": "Sun, 03 Jan 2021 00:00:00 GMT", "description": "Nearshore benthic seawater temperature (plus pressure and salinity for some sites) in McMurdo Sound, Antarctica for 2017-2019. Data includes those from standalone temperature (sometimes pressure) for several sites around McMurdo Sound as well as data from the cabled McMurdo Oceanographic Observatory moored conductivity-temperature-depth (CTD) sensor at the McMurdo Station seawater intake jetty. Data are from high precision SeaBird sensors (SBE56, SBE39, SBE19Plus and SBE37), with sample intervals from 90 sec to 15 min, depending on site. Sampled sites include Explorer\u0027s Cove at New Harbor, Cape Evans, Granite Harbor, and the McMurdo Station jetty. All sensors were deployed near or on the benthos at 20-25 m deep, in typical nearshore benthic fish and invertebrate habitat.", "east": 166.665141, "geometry": ["POINT(164.656536 -77.4259455)"], "keywords": "Antarctica; Benthic Ecology; CTD; Depth; McMurdo Sound; Oceanography; Oceans; Physical Oceanography; Pressure; Salinity; Seawater Measurements; Seawater Temperature; Supercooling; Tides", "locations": "McMurdo Sound; Antarctica", "north": -77.000624, "nsf_funding_programs": "Antarctic Instrumentation and Support", "persons": "Cziko, Paul", "project_titles": "Habitat Severity and Internal Ice in Antarctic Notothenioid Fishes", "projects": [{"proj_uid": "p0010147", "repository": "USAP-DC", "title": "Habitat Severity and Internal Ice in Antarctic Notothenioid Fishes"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.851267, "title": "High-resolution nearshore benthic seawater temperature from around McMurdo Sound, Antarctica (2017-2019)", "uid": "601420", "west": 162.647931}, {"awards": "1341736 Adams, Byron; 1341631 Lyons, W. Berry", "bounds_geometry": ["POLYGON((-177.3907 -84.46466667,-177.06501 -84.46466667,-176.73932 -84.46466667,-176.41363 -84.46466667,-176.08794 -84.46466667,-175.76225 -84.46466667,-175.43656 -84.46466667,-175.11087 -84.46466667,-174.78518 -84.46466667,-174.45949 -84.46466667,-174.1338 -84.46466667,-174.1338 -84.566988336,-174.1338 -84.669310002,-174.1338 -84.771631668,-174.1338 -84.873953334,-174.1338 -84.976275,-174.1338 -85.078596666,-174.1338 -85.180918332,-174.1338 -85.283239998,-174.1338 -85.385561664,-174.1338 -85.48788333,-174.45949 -85.48788333,-174.78518 -85.48788333,-175.11087 -85.48788333,-175.43656 -85.48788333,-175.76225 -85.48788333,-176.08794 -85.48788333,-176.41363 -85.48788333,-176.73932 -85.48788333,-177.06501 -85.48788333,-177.3907 -85.48788333,-177.3907 -85.385561664,-177.3907 -85.283239998,-177.3907 -85.180918332,-177.3907 -85.078596666,-177.3907 -84.976275,-177.3907 -84.873953334,-177.3907 -84.771631668,-177.3907 -84.669310002,-177.3907 -84.566988336,-177.3907 -84.46466667))"], "date_created": "Sat, 02 Jan 2021 00:00:00 GMT", "description": "Soil samples were collected from the Shackleton Glacier region, located in the Queen Maud Mountains during the 2017-2018 austral summer. A subset of 27 samples were analyzed for stable isotopes of S, N, C, and O in nitrate, sulfate, and (bi)carbonate. ). \u03b415N-NO3 values ranged from -47.8 to 20.4\u2030 and, while all \u039417O-NO3 values are positive, they ranged from 15.7 to 45.9\u2030. \u03b434S-SO4 and \u03b418O-SO4 values ranged from 12.5 and 17.9\u2030 and -14.5 to -7.1\u2030, respectively. Total inorganic carbon isotopes ((bi)carbonate) in bulk soil samples ranged from 0.2 to 8.5\u2030 for \u03b413C and -38.8 to -9.6\u2030 for \u03b418O.", "east": -174.1338, "geometry": ["POINT(-175.76225 -84.976275)"], "keywords": "Antarctica; Geochemistry; Nitrate; Shackleton Glacier; Stable Isotopes; Sulfate; Transantarctic Mountains", "locations": "Antarctica; Transantarctic Mountains; Shackleton Glacier", "north": -84.46466667, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "Diaz, Melisa A.; Lyons, W. Berry; Gardner, Christopher B.", "project_titles": "Collaborative Research: The Role of Glacial History on the Structure and Functioning of Ecological Communities in the Shackleton Glacier Region of the Transantarctic Mountains", "projects": [{"proj_uid": "p0010140", "repository": "USAP-DC", "title": "Collaborative Research: The Role of Glacial History on the Structure and Functioning of Ecological Communities in the Shackleton Glacier Region of the Transantarctic Mountains"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -85.48788333, "title": "Shackleton Glacier region water-soluble salt isotopes", "uid": "601419", "west": -177.3907}, {"awards": "1341736 Adams, Byron; 1341631 Lyons, W. Berry", "bounds_geometry": ["POLYGON((-177.4213 -84.4647,-177.08802 -84.4647,-176.75474 -84.4647,-176.42146 -84.4647,-176.08818 -84.4647,-175.7549 -84.4647,-175.42162 -84.4647,-175.08834 -84.4647,-174.75506 -84.4647,-174.42178 -84.4647,-174.0885 -84.4647,-174.0885 -84.56732,-174.0885 -84.66994,-174.0885 -84.77256,-174.0885 -84.87518,-174.0885 -84.9778,-174.0885 -85.08042,-174.0885 -85.18304,-174.0885 -85.28566,-174.0885 -85.38828,-174.0885 -85.4909,-174.42178 -85.4909,-174.75506 -85.4909,-175.08834 -85.4909,-175.42162 -85.4909,-175.7549 -85.4909,-176.08818 -85.4909,-176.42146 -85.4909,-176.75474 -85.4909,-177.08802 -85.4909,-177.4213 -85.4909,-177.4213 -85.38828,-177.4213 -85.28566,-177.4213 -85.18304,-177.4213 -85.08042,-177.4213 -84.9778,-177.4213 -84.87518,-177.4213 -84.77256,-177.4213 -84.66994,-177.4213 -84.56732,-177.4213 -84.4647))"], "date_created": "Sat, 02 Jan 2021 00:00:00 GMT", "description": "During the 2017-2018 austral summer, 220 surface soil samples (~top 5 cm) were collected from 11 distinct ice-free areas (Roberts Massif, Schroeder Hill, Mt. Augustana, Bennett Platform, Mt. Heekin, Thanksgiving Valley, Taylor Nunatak, Mt. Franke, Mt. Wasko, Nilsen Peak, and Mt. Speed) along the Shackleton Glacier. Dried soils were leached at a 1:5 soil to DI water ratio, and the leachate was filtered through 0.4 \u00b5m Nucleopore membrane filters. The leachate was analyzed for anions (F-, Cl-, Br-, and SO42-) which were measured on a Dionex ICS-2100 ion chromatograph, cations (K+, Na+, Ca2+, Mg2+, and Sr2+) which were measured on a PerkinElmer Optima 8300 Inductively Coupled Plasma-Optical Emission Spectrometer (ICP-OES), and nutrients (NO3- + NO2-, PO43-, H4SiO4, and NH3) which were measured on a Skalar San++ Automated Wet Chemistry Analyzer at The Ohio State University. Perchlorate (ClO4-) and chlorate (ClO3-) were measured using an ion chromatograph-tandem mass spectrometry technique (IC-MS/MS) at Texas Tech University. Accuracy was typically better than 5% for all major anions, cations, and nutrients, as determined by the NIST 1643e external reference standard and the 2015 USGS interlaboratory calibration standard (M-216), and better than 10% for perchlorate and chlorate, as determined by spike recoveries.", "east": -174.0885, "geometry": ["POINT(-175.7549 -84.9778)"], "keywords": "Antarctica; Geochemistry; Shackleton Glacier", "locations": "Antarctica; Shackleton Glacier", "north": -84.4647, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "Diaz, Melisa A.; Lyons, W. Berry; Gardner, Christopher B.", "project_titles": "Collaborative Research: The Role of Glacial History on the Structure and Functioning of Ecological Communities in the Shackleton Glacier Region of the Transantarctic Mountains", "projects": [{"proj_uid": "p0010140", "repository": "USAP-DC", "title": "Collaborative Research: The Role of Glacial History on the Structure and Functioning of Ecological Communities in the Shackleton Glacier Region of the Transantarctic Mountains"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -85.4909, "title": "Shackleton Glacier region soil water-soluble geochemical data", "uid": "601418", "west": -177.4213}, {"awards": "1644196 Cziko, Paul", "bounds_geometry": ["POINT(166.6645 -77.851)"], "date_created": "Tue, 29 Dec 2020 00:00:00 GMT", "description": "Long-term images taken by the camera from the McMurdo Oceanographic Observatory mooring in McMurdo Sound, Antarctica during its 2-year deployment (2017-2019). The mooring was situated at the seawater terminus of the McMurdo Station seawater intake jetty at 21 m deep, typically under thick sea ice cover. The automated 360\u00b0 pan-tilt-zoom (ptz) camera, inside of an air-filled self-cleaning dome, was programmed to move to 42 ptz \"waypoints\" every hour and take a still 1920x1080 JPG image for archiving. Lights, oriented in one direction only, illuminated a rock/rubble slope for much of each winter, when there was no natural illumination. The camera was situated on a concrete block, which elevated the camera about 1m off of the seabed. Motile and sessile benthic biota, including notothenioid fishes, anemones, pycnogonids, asteroids, soft-corals, sponges, and nudibranchs are commonly seen in the images. Some ptz waypoints survey the water column and underside of the sea ice, capturing also the presence of larval/juvenile fishes and other plankton/nekton in the water column. Maximum intervals between subsequent images from the same ptz waypoint were about 1 hour, though many waypoints were captured at somewhat higher frequency. Interval images, taken at 5-min intervals irrespective of camera orientation, were also captured. Images are occasionally obscured/impacted by the camera dome\u0027s wiper, darkness, low visibility, minor fouling of the camera dome, and out-of-focus lens elements. ", "east": 166.6645, "geometry": ["POINT(166.6645 -77.851)"], "keywords": "Antarctica; Benthic Ecology; Benthic Invertebrates; Biota; McMurdo Sound; Notothenioid; Notothenioid Fishes; Photo/video; Photo/Video; Rocky Reef Community; Soft-Bottom Community; Timelaps Images", "locations": "Antarctica; McMurdo Sound", "north": -77.851, "nsf_funding_programs": "Antarctic Instrumentation and Support", "persons": "Cziko, Paul", "project_titles": "Habitat Severity and Internal Ice in Antarctic Notothenioid Fishes", "projects": [{"proj_uid": "p0010147", "repository": "USAP-DC", "title": "Habitat Severity and Internal Ice in Antarctic Notothenioid Fishes"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.851, "title": "Long-term underwater images from around a single mooring site in McMurdo Sound, Antarctica (2017-2019)", "uid": "601417", "west": 166.6645}, {"awards": "1644196 Cziko, Paul", "bounds_geometry": ["POINT(166.6645 -77.851)"], "date_created": "Tue, 29 Dec 2020 00:00:00 GMT", "description": "Broadband underwater acoustic recordings from the McMurdo Oceanographic Observatory mooring near the seaward terminus of the McMurdo Station seawater intake jetty. An omnidirectional Ocean Sonics icListen hydrophone (SB2-ETH, SN 1713) recorded continuously at 512 kilosamples/second (256 kHz Nyquist frequency; 24 bit) for 2 years. The hydrophone was mounted vertically on a steel strut (insulated with rubber sheet) at about 70 cm above the mud/gravel seabed at 21m deep, with the sloping 45\u00b0 rubble face of the jetty just behind the hydrophone. Temporal coverage is \u003e90%, with gaps and truncated files arising due to network and power outages and software bugs. The audio recordings are 10 minute WAV files, compressed using the lossless FLAC code (Free Lossless Audio Codec, xiph.org; about 33MB of data/minute compressed; 100MB/min uncompressed). The hydrophone was under thick (to 3 m) sea ice cover for the majority of the dataset. The majority of the recorded biological sounds were produced by Weddell seals. Orca were present intermittently (~10 days total) in January-March in both summers. Known non-biological sounds include irregular low-intensity, broad-spectrum clicks and cracks from the sea ice cover, occasional wind noise, a 1.5-s gurgle with components to 200kHz every 90s from the CTD\u2019s pump, a broad-spectrum mechanical sound for 3 min every 4 h from the observatory\u0027s underwater camera cleaning system, low-intensity whines (about 18, 58, 83, and 130 kHz, though variable over the dataset) thought to be from the station seawater pumps (\u003e100 m away within the jetty\u2019s well casing), and intermittent noises from tracked-vehicles and helicopters (September\u2013February), SCUBA divers (October\u2013December), and ships (January). Given hosting limitations, only every 6th file (roughly 10min/hour) has been archived here. Additional data can be obtained by contacting the primary author of the dataset, who will maintain it for as long as possible. Audio spectrogram images (PNGs) at three frequency ranges (three stacked panels per image, upper limits of 2.5, 25, and 256 kHz) from the entire dataset (all data, not subsampled) are also archived separately.", "east": 166.6645, "geometry": ["POINT(166.6645 -77.851)"], "keywords": "Antarctica; Bioacoustics; Biota; Hydroacoustics; Killer Whales; Leptonychotes Weddellii; McMurdo Sound; Oceans; Orcinus Orca; Sea Ice; Weddell Seal; Whales", "locations": "McMurdo Sound; Antarctica", "north": -77.851, "nsf_funding_programs": "Antarctic Instrumentation and Support", "persons": "Cziko, Paul", "project_titles": "Habitat Severity and Internal Ice in Antarctic Notothenioid Fishes", "projects": [{"proj_uid": "p0010147", "repository": "USAP-DC", "title": "Habitat Severity and Internal Ice in Antarctic Notothenioid Fishes"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.851, "title": "Long-term broadband underwater acoustic recordings from McMurdo Sound, Antarctica (2017-2019)", "uid": "601416", "west": 166.6645}, {"awards": "1246148 Severinghaus, Jeffrey; 1245821 Brook, Edward J.; 1245659 Petrenko, Vasilii", "bounds_geometry": null, "date_created": "Mon, 28 Dec 2020 00:00:00 GMT", "description": "Inert gas measurements on a large diameter (0.24m), shallow (20m) ice core from Taylor Glacier for mean ocean temperature reconstruction from 60 - 74 ka.\r\nFour samples were also measured on the WAIS Divide ice core to validate Taylor Glacier reconstruction. ", "east": null, "geometry": null, "keywords": "Antarctica; Glaciology; Ice Core Data; Ice Core Records; Paleoclimate; Paleotemperature; Taylor Glacier", "locations": "Taylor Glacier; Antarctica", "north": null, "nsf_funding_programs": null, "persons": "Shackleton, Sarah", "project_titles": "Collaborative Research: The Taylor Glacier, Antarctica, Horizontal Ice Core: Exploring changes in the Natural Methane Budget in a Warming World and Expanding the Paleo-archive", "projects": [{"proj_uid": "p0000283", "repository": "USAP-DC", "title": "Collaborative Research: The Taylor Glacier, Antarctica, Horizontal Ice Core: Exploring changes in the Natural Methane Budget in a Warming World and Expanding the Paleo-archive"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Mean Ocean Temperature in Marine Isotope Stage 4", "uid": "601415", "west": null}, {"awards": "1341602 Crockett, Elizabeth; 1341663 O\u0027Brien, Kristin", "bounds_geometry": null, "date_created": "Thu, 24 Dec 2020 00:00:00 GMT", "description": "Antarctic notothenioids are noted for extreme stenothermy, yet underpinnings of their thermal limits are not fully understood. We hypothesized that properties of ventricular membranes could explain previously observed differences among notothenioids in temperature onset of cardiac arrhythmias and persistent asystole. Microsomes were prepared using ventricles from six species of notothenioids, including four species from the hemoglobin-less (Hb-) family Channichthyidae (icefishes), which also differentially express cardiac myoglobin (Mb), and two species from the (Hb+) Nototheniidae. We determined membrane fluidity and structural integrity by quantifying fluorescence depolarization of 1,6-diphenyl-1,3,5-hexatriene (DPH) and leakage of 5(6)-carboxyfluorescein, respectively, over a temperature range from ambient (0 \u00b0C) to 20 \u00b0C. Compositions of membrane phospholipids and cholesterol contents were also quantified. Membranes from all four species of icefishes exhibited greater fluidity than membranes from the red-blooded species N. coriiceps. Thermal sensitivity of fluidity did not vary among species. The greatest thermal sensitivity to leakage occurred between 0 and 5 \u00b0C for all species, while membranes from the icefish, Chaenocephalus aceratus (Hb-/Mb-) displayed leakage that was nearly 1.5-fold greater than leakage in N. coriiceps (Hb+/Mb+). Contents of phosphatidylethanolamine (PE) were approximately 1.5-fold greater in icefishes than in red-blooded fishes, and phospholipids had a higher degree of unsaturation in icefishes than in Hb + notothenioids. Cholesterol contents were lowest in Champsocephalus gunnari (Hb-/Mb-) and highest in the two Hb+/Mb + species, G. gibberifrons and N. coriiceps. Our results reveal marked differences in membrane properties and indicate a breach in membrane fluidity and structural integrity at a lower temperature in icefishes than in red-blooded notothenioids. ", "east": null, "geometry": null, "keywords": "Antarctica; Antarctic Peninsula", "locations": "Antarctica; Antarctic Peninsula", "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "O\u0027Brien, Kristin; Evans, Elizabeth; Farnoud, Amir; Crockett, Elizabeth", "project_titles": "Collaborative Research: The Physiological and Biochemical Underpinnings of Thermal Tolerance in Antarctic Notothenioid Fishes", "projects": [{"proj_uid": "p0010084", "repository": "USAP-DC", "title": "Collaborative Research: The Physiological and Biochemical Underpinnings of Thermal Tolerance in Antarctic Notothenioid Fishes"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Thermal sensitivity of membrane fluidity and integrity in hearts of Antarctic fishes that vary in expression of hemoglobin and myoglobin", "uid": "601414", "west": null}, {"awards": "1043092 Steig, Eric", "bounds_geometry": ["POLYGON((-158.72 -77.79,-154.056 -77.79,-149.392 -77.79,-144.728 -77.79,-140.064 -77.79,-135.4 -77.79,-130.736 -77.79,-126.072 -77.79,-121.408 -77.79,-116.744 -77.79,-112.08 -77.79,-112.08 -78.178,-112.08 -78.566,-112.08 -78.954,-112.08 -79.342,-112.08 -79.73,-112.08 -80.118,-112.08 -80.506,-112.08 -80.894,-112.08 -81.282,-112.08 -81.67,-116.744 -81.67,-121.408 -81.67,-126.072 -81.67,-130.736 -81.67,-135.4 -81.67,-140.064 -81.67,-144.728 -81.67,-149.392 -81.67,-154.056 -81.67,-158.72 -81.67,-158.72 -81.282,-158.72 -80.894,-158.72 -80.506,-158.72 -80.118,-158.72 -79.73,-158.72 -79.342,-158.72 -78.954,-158.72 -78.566,-158.72 -78.178,-158.72 -77.79))"], "date_created": "Tue, 22 Dec 2020 00:00:00 GMT", "description": "This data set contains the VSMOW-SLAP d17O, d18O, and 17O-excess data from the WAIS Divide Ice Core Project, Siple Dome and Taylor Dome, along with the published and VSMOW-SLAP normalized d17O, d18O, and 17O-excess for Vostok [Landais et al. 2008], EPICA Dome C and Talos Dome [Winkler et al., 2012]. The data cover the Last Glacial Maximum (25-20 ka), through the Early Holocene (12-9 ka) and into present-day (past 2 kyr)", "east": -112.08, "geometry": ["POINT(-135.4 -79.73)"], "keywords": "Antarctica; Ice Core; Oxygen Isotope; WAIS Divide", "locations": "Antarctica; WAIS Divide", "north": -77.79, "nsf_funding_programs": null, "persons": "Steig, Eric J.; Schoenemann, Spruce", "project_titles": "Collaborative Research: Stable Isotopes of Ice in the Transition and Glacial Sections of the WAIS Divide Deep Ice Core", "projects": [{"proj_uid": "p0000010", "repository": "USAP-DC", "title": "Collaborative Research: Stable Isotopes of Ice in the Transition and Glacial Sections of the WAIS Divide Deep Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -81.67, "title": "17O excess from WAIS Divide, 0 to 25 ka BP", "uid": "601413", "west": -158.72}, {"awards": null, "bounds_geometry": ["POINT(-58 -62)"], "date_created": "Mon, 21 Dec 2020 00:00:00 GMT", "description": "Surface spectra of red and green snow algae were collected at two sites on King George Island (KGI), the largest of the South Shetland Islands, and one site on northern Nelson Island (NI), southwest of KGI in January 2018. Optically thick (\u003e 30cm) snow packs were prioritized for spectral albedo data acquisition and corresponding snow algae sampling in order to minimize the impact of the underlying ground on spectral albedo. Sites were also selected based on where it was possible to sample 1) a control site with relatively clean snow having no visible snow algae 2) green snow algae, 3) red snow algae and 4) mixed-phase green and red algae. At each site, duplicates of each snow type were measured with the spectrometer (except at Nelson Island where only one Mixed site was observed). All samples were collected around noon local Chilean time, when the seasonal snow pack was also receiving the most incoming solar radiation. Spectral reflectance measurements were collected with an Analytical Spectral Devices (ASD) FieldSpec\u00ae 4 hyperspectral spectroradiometer (Malvern Panalytical, USA) between 350 and 2500 nm. The sensor was equipped with a light-diffusing fore optic remote cosine receptor (RCR) to measure planar irradiance. We selected three different locations and collected spectral measurements for two samples each of green, red, and mixed snow algae patches, and two algae-free or \u201cclean\u201d snow areas, for a total of 24 measurement sites (2 of each of the 4 types across the 3 sites). Areas with snowmelt ponding were avoided. The RCR was placed upward to collect the downwelling planar irradiance incident upon the snow surface (Ed) and the upwelling planar irradiance reflected from the snow (Eu). Measurements were collected in triplicate. The operator was located in a direction 90 - 135\u00ba away from the sun to minimize solar glint and self-shadowing. Snow conditions did not allow for a tripod, so nadir orientation was determined by practice with a level and by visual assistance of an observer. Since the measurements were carried out under heavily overcast conditions where irradiance is dominated by the diffuse insolation with no solar azimuthal dependence, the influence of slight tilt when measuring the downwelling irradiance (i.e. the cosine error) is expected to be minor (\u003c0.5%). The reflectance measurements were taken prior to excavation of snow sample for laboratory analysis. Post-processing of the data involved computing spectral reflectance, as the ratio of the upwelling flux normalized to the downwelling flux for each wavelength. The mean of the three measurements was calculated for each site. Ambient light conditions were too low in the short-wave infrared wavelengths for getting adequate signal-to-noise for our measurements. In post-processing, reflectance values were truncated at 1350 nm for this analysis. This value represents the limit often used for RF calculations in other studies. In addition, empirical correction coefficients were used to correct for temperature related radiometric inter-channel steps using the procedure and MATLAB code from Hueni et al. (2017). This removed the step function near 1000 nm for most of the spectra, although not fully for all spectra. However, this discontinuity does not significantly impact results or albedo calculations. Albedo was calculated as the integrated R in two different intervals: visible (400-700 nm) and infrared (700-1300 nm). ", "east": -58.0, "geometry": ["POINT(-58 -62)"], "keywords": "Antarctica; South Shetland Islands", "locations": "Antarctica; South Shetland Islands", "north": -62.0, "nsf_funding_programs": null, "persons": "Khan, Alia", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -62.0, "title": "Red and Green Snow Algae Surface Spectra", "uid": "601412", "west": -58.0}, {"awards": "1341602 Crockett, Elizabeth; 1341663 O\u0027Brien, Kristin", "bounds_geometry": null, "date_created": "Fri, 18 Dec 2020 00:00:00 GMT", "description": "Icefishes characteristically lack the oxygen-binding protein haemoglobin and therefore are especially reliant on cardiovascular regulation to augment oxygen transport when oxygen demand increases, such as during activity and warming. Using both in vivo and in vitro experiments, we evaluated the roles for adrenaline and adenosine, two well-established cardio- and vasoactive molecules, in regulating the cardiovascular system of the blackfin icefish, Chaenocephalus aceratus. Despite increasing cardiac contractility (increasing twitch force and contraction kinetics in isometric myocardial strip preparations) and accelerating heart rate (\u0192H), adrenaline (5 nmol kg-1 bolus intra-arterial injection) did not significantly increase cardiac output (Q\u0307) in vivo because it elicited a large decrease in vascular conductance (Gsys). In contrast, and despite preliminary data suggesting a direct negative inotropic effect of adenosine on isolated atria and little effect on isolated ventricle strips, adenosine (500 nmol kg-1) generated a large increase in Q\u0307 by increasing Gsys, a change reminiscent of that previously reported during both acute warming and invoked activity. Our data thus illustrate how Q\u0307 in C. aceratus may be much more dependent on peripheral control of vasomotor tone than direct regulation of the heart. ", "east": null, "geometry": null, "keywords": "Antarctica; Antarctic Peninsula", "locations": "Antarctic Peninsula; Antarctica", "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "Joyce, Michael; Axelsson, Michael; Farrell, Anthony; Egginton, Stuart; O\u0027Brien, Kristin", "project_titles": "Collaborative Research: The Physiological and Biochemical Underpinnings of Thermal Tolerance in Antarctic Notothenioid Fishes", "projects": [{"proj_uid": "p0010084", "repository": "USAP-DC", "title": "Collaborative Research: The Physiological and Biochemical Underpinnings of Thermal Tolerance in Antarctic Notothenioid Fishes"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Adrenergic and adenosinergic regulation of the cardiovascular system in the Antarctic icefish Chaenocephalus aceratus", "uid": "601409", "west": null}, {"awards": "1341663 O\u0027Brien, Kristin", "bounds_geometry": null, "date_created": "Fri, 18 Dec 2020 00:00:00 GMT", "description": "Studies in temperate fishes provide evidence that cardiac mitochondrial function and the capacity to fuel cardiac work contribute to thermal tolerance. Here, we tested the hypothesis that decreased cardiac aerobic metabolic capacity contributes to the lower thermal tolerance of the haemoglobinless Antarctic icefish, Chaenocephalus aceratus, compared with that of the red-blooded Antarctic species, Notothenia coriiceps. Maximal activities of citrate synthase (CS) and lactate dehydrogenase (LDH), respiration rates of isolated mitochondria, adenylate levels and changes in mitochondrial protein expression were quantified from hearts of animals held at ambient temperature or exposed to their critical thermal maximum (CTmax). Compared with C. aceratus, activity of CS, ATP concentration and energy charge were higher in hearts of N. coriiceps at ambient temperature and CTmax While state 3 mitochondrial respiration rates were not impaired by exposure to CTmax in either species, state 4 rates, indicative of proton leakage, increased following exposure to CTmax in C. aceratus but not N. coriiceps The interactive effect of temperature and species resulted in an increase in antioxidants and aerobic metabolic enzymes in N. coriiceps but not in C. aceratus Together, our results support the hypothesis that the lower aerobic metabolic capacity of C. aceratus hearts contributes to its low thermal tolerance. ", "east": null, "geometry": null, "keywords": "Antarctica; Antarctic Peninsula", "locations": "Antarctica; Antarctic Peninsula", "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "O\u0027Brien, Kristin", "project_titles": "Collaborative Research: The Physiological and Biochemical Underpinnings of Thermal Tolerance in Antarctic Notothenioid Fishes", "projects": [{"proj_uid": "p0010084", "repository": "USAP-DC", "title": "Collaborative Research: The Physiological and Biochemical Underpinnings of Thermal Tolerance in Antarctic Notothenioid Fishes"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Cardiac metabolism in Antarctic fishes in response to an acute increase in temperature", "uid": "601405", "west": null}, {"awards": "1341663 O\u0027Brien, Kristin; 1341602 Crockett, Elizabeth", "bounds_geometry": null, "date_created": "Fri, 18 Dec 2020 00:00:00 GMT", "description": "The ability of Antarctic notothenioid fishes to mount a robust molecular response to hypoxia is largely unknown. The transcription factor, hypoxia-inducible factor-1 (HIF-1), a heterodimer of HIF-1\u03b1 and HIF-1\u03b2 subunits, is the master regulator of oxygen homeostasis in most metazoans. We sought to determine if, in the hearts of Antarctic notothenioids, HIF-1 is activated and functional in response to either an acute heat stress or hypoxia. The red-blooded Notothenia coriiceps and the hemoglobinless icefish, Chaenocephalus aceratus, were exposed to their critical thermal maximum (CTMAX) or hypoxia (5.0 \u00b1 0.3 mg of O2 L-1) for 2 h. Additionally, N. coriiceps was exposed to 2.3 \u00b1 0.3 mg of O2 L-1 for 12 h, and red-blooded Gobionotothen gibberifrons was exposed to both levels of hypoxia. Levels of HIF-1\u03b1 were quantified in nuclei isolated from heart ventricles using western blotting. Transcript levels of genes involved in anaerobic metabolism, and known to be regulated by HIF-1, were quantified by real-time PCR, and lactate levels were measured in heart ventricles. Protein levels of HIF-1\u03b1 increase in nuclei of hearts of N. coriiceps and C. aceratus in response to exposure to CTMAX and in hearts of N. coriiceps exposed to severe hypoxia, yet mRNA levels of anaerobic metabolic genes do not increase in any species, nor do lactate levels increase, suggesting that HIF-1 does not stimulate metabolic remodeling in hearts of notothenioids under these conditions. Together, these data suggest that Antarctic notothenioids may be vulnerable to hypoxic events, which are likely to increase with climate warming. ", "east": null, "geometry": null, "keywords": "Antarctica; Antarctic Peninsula", "locations": "Antarctic Peninsula; Antarctica", "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "O\u0027Brien, Kristin", "project_titles": "Collaborative Research: The Physiological and Biochemical Underpinnings of Thermal Tolerance in Antarctic Notothenioid Fishes", "projects": [{"proj_uid": "p0010084", "repository": "USAP-DC", "title": "Collaborative Research: The Physiological and Biochemical Underpinnings of Thermal Tolerance in Antarctic Notothenioid Fishes"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Hypoxia response of hearts of Antarctic fishes", "uid": "601406", "west": null}, {"awards": "1341663 O\u0027Brien, Kristin; 1341602 Crockett, Elizabeth", "bounds_geometry": null, "date_created": "Fri, 18 Dec 2020 00:00:00 GMT", "description": "In fishes, the spleen can function as an important reservoir for red blood cells (RBCs), which, following splenic contraction, may be released into the circulation to increase haematocrit during energy\u2010demanding activities. This trait is particularly pronounced in red\u2010blooded Antarctic fishes in which the spleen can sequester a large proportion of RBCs during rest, thereby reducing blood viscosity, which may serve as an adaptation to life in cold environments. In one species, Pagothenia borchgrevinki, it has previously been shown that splenic contraction primarily depends on cholinergic stimulation. The aim of the present study was to investigate the regulation of splenic contraction in five other Antarctic fish species, three red\u2010blooded notothenioids (Dissostichus mawsoni Norman, 1937, Gobionotothen gibberifrons L\u00f6nnberg, 1905, Notothenia coriiceps Richardson 1844) and two white\u2010blooded \u201cicefish\u201d (Chaenocephalus aceratus L\u00f6nnberg, 1906 and Champsocephalus gunnari L\u00f6nnberg, 1905), which lack haemoglobin and RBCs, but nevertheless possess a large spleen. In all species, splenic strips constricted in response to both cholinergic (carbachol) and adrenergic (adrenaline) agonists. Surprisingly, in the two species of icefish, the spleen responded with similar sensitivity to red\u2010blooded species, despite contraction being of little obvious benefit for releasing RBCs into the circulation. Although the icefish lineage lost functional haemoglobin before diversifying over the past 7.8\u20134.8 millions of years, they retain the capacity to contract the spleen, likely as a vestige inherited from their red\u2010blooded ancestors.", "east": null, "geometry": null, "keywords": "Antarctica; Antarctic Peninsula", "locations": "Antarctic Peninsula; Antarctica", "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "O\u0027Brien, Kristin; Joyce, William; Axelsson, Michael", "project_titles": "Collaborative Research: The Physiological and Biochemical Underpinnings of Thermal Tolerance in Antarctic Notothenioid Fishes", "projects": [{"proj_uid": "p0010084", "repository": "USAP-DC", "title": "Collaborative Research: The Physiological and Biochemical Underpinnings of Thermal Tolerance in Antarctic Notothenioid Fishes"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Measurements of splenic contraction in Antarctic fishes", "uid": "601407", "west": null}, {"awards": "1341663 O\u0027Brien, Kristin", "bounds_geometry": null, "date_created": "Fri, 18 Dec 2020 00:00:00 GMT", "description": "The Southern Ocean has experienced stable, cold temperatures for over 10 million years, yet particular regions are currently undergoing rapid warming. To investigate the impacts of warming on cardiovascular oxygen transport, we compared the cardio-respiratory performance in an Antarctic notothenioid (Notothenia coriiceps) that was maintained at 0 or 5\u00b0C for 6.0-9.5 weeks. When compared at the fish\u0027s respective acclimation temperature, the oxygen consumption rate and cardiac output were significantly higher in 5\u00b0C-acclimated than 0\u00b0C-acclimated fish. The 2.7-fold elevation in cardiac output in 5\u00b0C-acclimated fish (17.4 vs. 6.5 ml min-1 kg-1) was predominantly due to a doubling of stroke volume, likely in response to increased cardiac preload, as measured by higher central venous pressure (0.15 vs. 0.08 kPa); tachycardia was minor (29.5 vs. 25.2 beats min-1). When fish were acutely warmed, oxygen consumption rate increased by similar amounts in 0\u00b0C- and 5\u00b0C-acclimated fish at equivalent test temperatures. In both acclimation groups, the increases in oxygen consumption rate during acute heating were supported by increased cardiac output achieved by elevating heart rate, while stroke volume changed relatively little. Cardiac output was similar between both acclimation groups until 12\u00b0C when cardiac output became significantly higher in 5\u00b0C-acclimated fish, driven largely by their higher stroke volume. Although cardiac arrhythmias developed at a similar temperature (~14.5\u00b0C) in both acclimation groups, the hearts of 5\u00b0C-acclimated fish continued to pump until significantly higher temperatures (CTmax for cardiac function 17.7 vs. 15.0\u00b0C for 0\u00b0C-acclimated fish). These results demonstrate that N. coriiceps is capable of increasing routine cardiac output during both acute and chronic warming, although the mechanisms are different (heart rate-dependent versus primarily stroke volume-dependent regulation, respectively). Cardiac performance was enhanced at higher temperatures following 5\u00b0C acclimation, suggesting cardiovascular function may not constrain the capacity of N. coriiceps to withstand a warming climate.", "east": null, "geometry": null, "keywords": "Antarctica; Antarctic Peninsula", "locations": "Antarctica; Antarctic Peninsula", "north": null, "nsf_funding_programs": null, "persons": "Joyce, William; Egginton, Stuart; Farrell, Anthony; Axelsson, Michael; Crockett, Elizabeth; O\u0027Brien, Kristin", "project_titles": "Collaborative Research: The Physiological and Biochemical Underpinnings of Thermal Tolerance in Antarctic Notothenioid Fishes", "projects": [{"proj_uid": "p0010084", "repository": "USAP-DC", "title": "Collaborative Research: The Physiological and Biochemical Underpinnings of Thermal Tolerance in Antarctic Notothenioid Fishes"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Acclimation of cardiovascular function in Notothenia coriiceps", "uid": "601408", "west": null}, {"awards": "1341663 O\u0027Brien, Kristin; 1341602 Crockett, Elizabeth", "bounds_geometry": null, "date_created": "Fri, 18 Dec 2020 00:00:00 GMT", "description": "We tested the hypothesis that blackfin icefish (Chaenocephalus aceratus), one of the six species in the family Channichthyidae (the icefishes) that do not express haemoglobin and myoglobin, lack regulatory cardiovascular flexibility during acute warming and activity. The experimental protocols were designed to optimize the surgical protocol and minimize stress. First, minimally invasive heart rate (fH) measurements were made during a thermal ramp until cardiac failure in C. aceratus and compared with those from the closely related red-blooded black rockcod (Notothenia coriiceps). Then, integrative cardiovascular adjustments were more extensively studied using flow probes and intravascular catheters in C. aceratus during acute warming (from 0 to 8\u00b0C) at rest and after imposed activity. Chaenocephalus aceratus had a lower routine fH than N. coriiceps (9 beats min-1 versus 14 beats min-1) and a lower peak fH during acute warming (38 beats min-1 versus 55 beats min-1) with a similar cardiac breakpoint temperature (13 and 14\u00b0C, respectively). Routine cardiac output (Q\u0307) for C. aceratus at \u223c0\u00b0C was much lower (26.6 ml min-1 kg-1) than previously reported, probably because fish in the present study had a low fH (12 beats min-1) indicative of a high routine vagal tone and low stress. Chaenocephalus aceratus increased oxygen consumption during acute warming and with activity. Correspondingly, Q\u0307 increased considerably (maximally 86.3 ml min-1 kg-1), as did vascular conductance (5-fold). Thus, unlike earlier suggestions, these data provide convincing evidence that icefish can mount a well-developed cardiovascular regulation of heart rate, cardiac output and vascular conductance, and this regulatory capacity provides flexibility during acute warming. ", "east": null, "geometry": null, "keywords": "Antarctica; Antarctic Peninsula; Biota; Fish", "locations": "Antarctica; Antarctic Peninsula", "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "Joyce, William; Farrell, Anthony; Axelsson, Michael; Egginton, Stuart; Crockett, Elizabeth; O\u0027Brien, Kristin", "project_titles": "Collaborative Research: The Physiological and Biochemical Underpinnings of Thermal Tolerance in Antarctic Notothenioid Fishes", "projects": [{"proj_uid": "p0010084", "repository": "USAP-DC", "title": "Collaborative Research: The Physiological and Biochemical Underpinnings of Thermal Tolerance in Antarctic Notothenioid Fishes"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Effects of acute warming on cardiovascular performance of Antarctic fishes", "uid": "601410", "west": null}, {"awards": "0941678 ; 0424589 Gogineni, S. Prasad; 0733025 Blankenship, Donald; 1443690 Young, Duncan", "bounds_geometry": ["POLYGON((114 -74,115.2 -74,116.4 -74,117.6 -74,118.8 -74,120 -74,121.2 -74,122.4 -74,123.6 -74,124.8 -74,126 -74,126 -74.3,126 -74.6,126 -74.9,126 -75.2,126 -75.5,126 -75.8,126 -76.1,126 -76.4,126 -76.7,126 -77,124.8 -77,123.6 -77,122.4 -77,121.2 -77,120 -77,118.8 -77,117.6 -77,116.4 -77,115.2 -77,114 -77,114 -76.7,114 -76.4,114 -76.1,114 -75.8,114 -75.5,114 -75.2,114 -74.9,114 -74.6,114 -74.3,114 -74))"], "date_created": "Fri, 18 Dec 2020 00:00:00 GMT", "description": "The data set published here consists of 26 ice-penetrating radar IRHs (internal reflecting horizons) which were traced across multiple ice-penetrating radar surveys that deployed several generations of modern ice-penetrating radar sounders over a decade, between 2008 and 2018, over the Dome C region of the East Antarctic Plateau. The data set is associated to publication: Cavitte, M. G. P, Young, D. A, Mulvaney, R., Ritz, C., Greenbaum, J. S., Ng, G., Kempf, S. D., Quartini, E., Muldoon, G. R., Paden, J., Frezzotti, M., Roberts, J. L. , Tozer, C. R. , Schroeder, D. M. and Blankenship, D. D. A detailed radiostratigraphic data set for the central East Antarctic Plateau spanning from the Holocene to the mid-Pleistocene, Earth Syst. Sci. Data, 13, 4759\u20134777, 2021, https://doi.org/10.5194/essd-13-4759-2021.\r\n\r\nWe can subdivide the radar sounders used into three sets. The primary set was collected by the University of Texas at Austin Institute for Geophysics (UTIG) and the Australian Antarctic Division (AAD) as part of the ICECAP project) between 2008 and 2015. This includes the Oldest Ice candidate A (OIA) survey flown by ICECAP in January 2016. Data were collected with the High Capacity Airborne Radar Sounder (HiCARS) 1 \u0026 2 and its Multifrequency Airborne Radar-sounder for Full-phase Assessment (MARFA) descendant. The data was collected from a DC-3T Basler which operated from Concordia Station. \r\n\r\nThe second set consists of the Vostok-Dome C airborne radar transect was flown by the Center for Remote Sensing of Ice Sheets (CReSIS) at the University of Kansas using the Multi-Channel Coherent Radar Depth Sounder (MCoRDS) in a single flight line in 2013. A P-3 Orion operating from McMurdo Station collected these data as part of NASA Operation Ice Bridge. \r\n\r\nThe third set consists of a subset of the LDC ground-based radar survey, towed behind a PistenBully PB300 tractor, collected by the Beyond EPICA - Oldest Ice (BE-OI) European Consortium using the British Antarctic Survey\u2019s (BAS) Deep Looking Radio Echo Sounder (DELORES) radar system. Each IRH has been traced in all three radar sets and is published here as a single csv and netcdf file. Formats are self-documented in these csv/netcdf files. \r\n\r\nWhere HiCARS and MCoRDS radar transects are used, the IRH is provided at a 1 km spatial resolution, where DELORES radar transects are used, the IRH is provided at a 250 m spatial resolution. \r\n\r\nThe 26 IRHs published here were traced semi-automatically by first author Marie Cavitte, using Landmark\u0027s Decision Space Desktop software and its built-in picker. \r\n\r\nThe IRHs are dated at the EDC ice core using the AICC2012 timescale (Veres et al., 2013; Bazin et al., 2013). \r\n\r\nIce core ages are transferred onto the IRHs on radar transect MCM/JKB1a/EDMC01a at distance_m (column in the data sets) = 110.153 m along the transect. That radar point of closest approach is 94\u2009m away from the ice core site. Depth and age uncertainties associated to each IRH are quantified n the associated publication: Cavitte, M. G. P, Young, D. A, Mulvaney, R., Ritz, C., Greenbaum, J. S., Ng, G., Kempf, S. D., Quartini, E., Muldoon, G. R., Paden, J., Frezzotti, M., Roberts, J. L. , Tozer, C. R. , Schroeder, D. M. and Blankenship, D. D. A detailed radiostratigraphic data set for the central East Antarctic Plateau spanning from the Holocene to the mid-Pleistocene, Earth Syst. Sci. Data, 13, 4759\u20134777, 2021, https://doi.org/10.5194/essd-13-4759-2021. \r\n\n\r\n\r\nBesides NSF this dataset is the result of additional support from NERC grant - NE/D003733/1, NASA grants - NX08AN68G, NNX09AR52G, NNX11AD33G, NNX13AD53A, and funding from the G. Unger Vetlesen Foundation.\n\n\\nNote that the dataset was archived before the accompanying paper was officially published. The abstract and dataset description has been updated to cite the correct reference to the ESSD paper (Cavitte et al., 2021) after the paper was published. The headers of the actual data files contain only a placeholder to this reference.", "east": 126.0, "geometry": ["POINT(120 -75.5)"], "keywords": "Antarctica; East Antarctic Plateau; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; ICECAP; Ice Penetrating Radar; Internal Reflecting Horizons", "locations": "Antarctica; East Antarctic Plateau", "north": -74.0, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Earth Sciences; Antarctic Earth Sciences", "persons": "Cavitte, Marie G. P; Young, Duncan A.; Mulvaney, Robert; Ritz, Catherine; Greenbaum, Jamin; Ng, Gregory; Kempf, Scott D.; Quartini, Enrica; Muldoon, Gail R.; Paden, John; Frezzotti, Massimo; Roberts, Jason; Tozer, Carly; Schroeder, Dustin; Blankenship, Donald D.", "project_titles": "Center for Remote Sensing of Ice Sheets (CReSIS); Collaborative Research: Southern Plateau Ice-sheet Characterization and Evolution of the Central Antarctic Plate (SPICECAP); IPY Research: Investigating the Cryospheric Evolution of the Central Antarctic Plate (ICECAP)", "projects": [{"proj_uid": "p0000719", "repository": "USAP-DC", "title": "IPY Research: Investigating the Cryospheric Evolution of the Central Antarctic Plate (ICECAP)"}, {"proj_uid": "p0000102", "repository": "USAP-DC", "title": "Center for Remote Sensing of Ice Sheets (CReSIS)"}, {"proj_uid": "p0010115", "repository": "USAP-DC", "title": "Collaborative Research: Southern Plateau Ice-sheet Characterization and Evolution of the Central Antarctic Plate (SPICECAP)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Dome C Ice Core", "south": -77.0, "title": "Ice-penetrating radar internal stratigraphy over Dome C and the wider East Antarctic Plateau", "uid": "601411", "west": 114.0}, {"awards": "1842021 Campbell, Seth", "bounds_geometry": ["POLYGON((-168 -82,-162.3 -82,-156.6 -82,-150.9 -82,-145.2 -82,-139.5 -82,-133.8 -82,-128.1 -82,-122.4 -82,-116.7 -82,-111 -82,-111 -82.6,-111 -83.2,-111 -83.8,-111 -84.4,-111 -85,-111 -85.6,-111 -86.2,-111 -86.8,-111 -87.4,-111 -88,-116.7 -88,-122.4 -88,-128.1 -88,-133.8 -88,-139.5 -88,-145.2 -88,-150.9 -88,-156.6 -88,-162.3 -88,-168 -88,-168 -87.4,-168 -86.8,-168 -86.2,-168 -85.6,-168 -85,-168 -84.4,-168 -83.8,-168 -83.2,-168 -82.6,-168 -82))"], "date_created": "Sat, 12 Dec 2020 00:00:00 GMT", "description": "The dataset includes initialization and output files of a numerical ice flow simulation of the Whillans and Mercer Ice Streams . The Ice Sheet System Model (ISSM) model was used to solve a 100-year transient stress balance solution of the region with ~10 kPA/yr friction increase downstream of the shear margin between the Whillans and Mercer ice streams. \r\n", "east": -111.0, "geometry": ["POINT(-139.5 -85)"], "keywords": "Antarctica; Glaciology; Ice Sheet Flow Model; Ice Shelf Dynamics; Mercer Ice Stream; Model Data; Snow/ice; Snow/Ice; Whillans Ice Stream", "locations": "Antarctica; Mercer Ice Stream; Whillans Ice Stream", "north": -82.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Kaluzienski, Lynn", "project_titles": "RAPID Proposal: Constraining kinematics of the Whillans/Mercer Ice Stream Confluence", "projects": [{"proj_uid": "p0010145", "repository": "USAP-DC", "title": "RAPID Proposal: Constraining kinematics of the Whillans/Mercer Ice Stream Confluence"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -88.0, "title": "Whillans and Mercer Shear Margin Ice Flow simulation in ISSM", "uid": "601404", "west": -168.0}, {"awards": "1842021 Campbell, Seth", "bounds_geometry": ["POLYGON((-168 -82,-162.3 -82,-156.6 -82,-150.9 -82,-145.2 -82,-139.5 -82,-133.8 -82,-128.1 -82,-122.4 -82,-116.7 -82,-111 -82,-111 -82.5,-111 -83,-111 -83.5,-111 -84,-111 -84.5,-111 -85,-111 -85.5,-111 -86,-111 -86.5,-111 -87,-116.7 -87,-122.4 -87,-128.1 -87,-133.8 -87,-139.5 -87,-145.2 -87,-150.9 -87,-156.6 -87,-162.3 -87,-168 -87,-168 -86.5,-168 -86,-168 -85.5,-168 -85,-168 -84.5,-168 -84,-168 -83.5,-168 -83,-168 -82.5,-168 -82))"], "date_created": "Sat, 12 Dec 2020 00:00:00 GMT", "description": "The dataset includes GPS coordinates for crevasse/fracture locations picked from 350MHz and 400Mhz frequency GPR dataset in the Whillans/Mercer Shear Margin along the SALSA traverse route with associated kinematic outputs for each feature (shear strain rate, vorticity, dilatation). GPS coordinates are in the Antarctic Polar Stereographic projection (EPSG:3031). ", "east": -111.0, "geometry": ["POINT(-139.5 -84.5)"], "keywords": "Antarctica; Crevasses; Glaciology; GPR; GPS; Ice Sheet Flow Model; Ice Shelf Dynamics; Snow/ice; Snow/Ice; Whillans Ice Stream", "locations": "Whillans Ice Stream; Antarctica", "north": -82.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Kaluzienski, Lynn", "project_titles": "RAPID Proposal: Constraining kinematics of the Whillans/Mercer Ice Stream Confluence", "projects": [{"proj_uid": "p0010145", "repository": "USAP-DC", "title": "RAPID Proposal: Constraining kinematics of the Whillans/Mercer Ice Stream Confluence"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -87.0, "title": "2017 GPR Observations of the Whillans and Mercer Ice Streams", "uid": "601403", "west": -168.0}, {"awards": "1643715 Moussavi, Mahsa Sadat", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Thu, 10 Dec 2020 00:00:00 GMT", "description": "This dataset contains extents and depths of supraglacial lakes on ice shelves across the Antarctic ice sheet, mapped from Landsat 8 imagery collected over the 2013-2020 period. ", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Landsat-8; Satellite Imagery; Supraglacial Lake", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Moussavi, Mahsa; Pope, Allen; Trusel, Luke; Abdalati, Waleed; Halberstadt, Anna Ruth", "project_titles": "Collaborative Research: Water on the Antarctic Ice Sheet: Quantifying Surface Melt and Mapping Supraglacial Lakes", "projects": [{"proj_uid": "p0010088", "repository": "USAP-DC", "title": "Collaborative Research: Water on the Antarctic Ice Sheet: Quantifying Surface Melt and Mapping Supraglacial Lakes"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Supraglacial Lakes in Antarctica", "uid": "601401", "west": -180.0}, {"awards": "0724929 Simms, Alexander", "bounds_geometry": ["POLYGON((-61.8 -61.3,-61.07 -61.3,-60.34 -61.3,-59.61 -61.3,-58.88 -61.3,-58.15 -61.3,-57.42 -61.3,-56.69 -61.3,-55.96 -61.3,-55.23 -61.3,-54.5 -61.3,-54.5 -61.55,-54.5 -61.8,-54.5 -62.05,-54.5 -62.3,-54.5 -62.55,-54.5 -62.8,-54.5 -63.05,-54.5 -63.3,-54.5 -63.55,-54.5 -63.8,-55.23 -63.8,-55.96 -63.8,-56.69 -63.8,-57.42 -63.8,-58.15 -63.8,-58.88 -63.8,-59.61 -63.8,-60.34 -63.8,-61.07 -63.8,-61.8 -63.8,-61.8 -63.55,-61.8 -63.3,-61.8 -63.05,-61.8 -62.8,-61.8 -62.55,-61.8 -62.3,-61.8 -62.05,-61.8 -61.8,-61.8 -61.55,-61.8 -61.3))"], "date_created": "Fri, 06 Nov 2020 00:00:00 GMT", "description": "", "east": -54.5, "geometry": ["POINT(-58.15 -62.55)"], "keywords": "Antarctica; Grain Size; Granulometry; Joinville Island; Livingston Island; LMG0412; Raised Beaches", "locations": "Joinville Island; Livingston Island; Antarctica", "north": -61.3, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Theilen, Brittany; Simms, Alexander", "project_titles": "Collaborative Research: New Constraints on Post-Glacial Rebound and Holocene Environmental History along the Northern Antarctic Peninsula from Raised Beaches", "projects": [{"proj_uid": "p0010132", "repository": "USAP-DC", "title": "Collaborative Research: New Constraints on Post-Glacial Rebound and Holocene Environmental History along the Northern Antarctic Peninsula from Raised Beaches"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -63.8, "title": "Granulometry of Joinville and Livingston Island beaches", "uid": "601400", "west": -61.8}, {"awards": "1245821 Brook, Edward J.; 1246148 Severinghaus, Jeffrey; 1245659 Petrenko, Vasilii", "bounds_geometry": null, "date_created": "Mon, 02 Nov 2020 00:00:00 GMT", "description": "Ice core measurements of the concentration and stable isotopic composition of atmospheric nitrous oxide (N2O) 74,000-59,000 years ago constrain marine and terrestrial emissions. The data include two major Dansgaard-Oeschger (D-O) events and the N2O decrease during global cooling at the Marine Isotope Stage (MIS) 5a-4 transition. The N2O increase associated with D-O 19 (~73-71.5 ka) was driven by equal contributions from marine and terrestrial emissions. The N2O decrease during the transition into MIS 4 (~71.5-67.5 ka) was caused by gradual reductions of similar magnitude in both marine and terrestrial sources. A 50 ppb increase in N2O concentration at the end of MIS 4 was caused by gradual increases in marine and terrestrial emissions between ~64-61 ka, followed by an abrupt increase in marine emissions at the onset of D-O 16/17 (59.5 ka). This suggests that the importance of marine versus terrestrial emissions in controlling millennial-scale N2O fluctuations varied in time.", "east": null, "geometry": null, "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Data; Ice Core Gas Records; Ice Core Records; Marine Isotope Stage 4; MIS 4; Nitrous Oxide; Pleistocene; Taylor Dome Ice Core; Taylor Glacier", "locations": "Taylor Glacier; Antarctica; Taylor Glacier", "north": null, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology", "persons": "Menking, James; Brook, Edward J.; Schilt, Adrian; Shackleton, Sarah; Dyonisius, Michael; Severinghaus, Jeffrey P.; Petrenko, Vasilii", "project_titles": "Collaborative Research: The Taylor Glacier, Antarctica, Horizontal Ice Core: Exploring changes in the Natural Methane Budget in a Warming World and Expanding the Paleo-archive", "projects": [{"proj_uid": "p0000283", "repository": "USAP-DC", "title": "Collaborative Research: The Taylor Glacier, Antarctica, Horizontal Ice Core: Exploring changes in the Natural Methane Budget in a Warming World and Expanding the Paleo-archive"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Taylor Dome Ice Core", "south": null, "title": "N2O Concentration and Isotope Data for 74-59 ka from Taylor Glacier, Antarctica", "uid": "601398", "west": null}, {"awards": "1443105 Steig, Eric", "bounds_geometry": ["POINT(180 -90)"], "date_created": "Wed, 28 Oct 2020 00:00:00 GMT", "description": "This data set provides the input and output data used in Kahle et al. 2020 to reconstruct climate variables at the South Pole. The files below include high resolution water isotopes, water isotope diffusion length, and various reconstructions of temperature, accumulation rate, and thinning function for the SPC14 ice core. An inverse approach was used to combine information from water isotope diffusion length, Dage, and annual-layer thickness to solve for temperature, accumulation rate, and thinning function. Corrections were applied to account for the advection of ice from upstream to yield estimates for the South Pole site. Updated data for Hires_Water_Isotopes_halfcm.txt is available at www.usap-dc.org/view/dataset/601429.", "east": 180.0, "geometry": ["POINT(180 -90)"], "keywords": "Accumulation; Antarctica; Diffusion Length; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Ice Dynamic; Layer Thinning; Oxygen Isotope; South Pole; SPICEcore; Temperature", "locations": "Antarctica; South Pole", "north": -90.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Kahle, Emma; Steig, Eric J.; Jones, Tyler R.; Fudge, T. J.; Koutnik, Michelle; Morris, Valerie; Vaughn, Bruce; Schauer, Andrew; Stevens, Max; Conway, Howard; Waddington, Edwin D.; Buizert, Christo; Epifanio, Jenna; White, James", "project_titles": "Collaborative Research: A 1500m Ice Core from South Pole; Collaborative Research: Record of the Triple-oxygen Isotope and Hydrogen Isotope Composition of Ice from an Ice Core at South Pole", "projects": [{"proj_uid": "p0010060", "repository": "USAP-DC", "title": "Collaborative Research: A 1500m Ice Core from South Pole"}, {"proj_uid": "p0010065", "repository": "USAP-DC", "title": "Collaborative Research: Record of the Triple-oxygen Isotope and Hydrogen Isotope Composition of Ice from an Ice Core at South Pole"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -90.0, "title": "Temperature, accumulation rate, and layer thinning from the South Pole ice core (SPC14)", "uid": "601396", "west": 180.0}, {"awards": "1743310 Kingslake, Jonathan", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Sat, 24 Oct 2020 00:00:00 GMT", "description": "This data set contains the results presented in Lai et al. (2020), including; the 125m-resolution fracture map, the spatial distribution of fracture depths and the required initial flaw size for hydrofracture, which is calculated using linear elastic fracture mechanics (LEFM) according to the ice-shelf stress fields and thickness. The dimensionless stress (Rxx_bar, defined in Lai et al. (2020)) governs how fractures behave. Using a dimensionless stress criteria we have determined which ice-shelf areas are vulnerable to hydrofracture if inundated with melt water (Rxx_bar \u003eRxx*_bar).", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Computer Model; Fractures; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Meltwater; Model Data", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Lai, Ching-Yao", "project_titles": "Satellite observations and modelling of surface meltwater flow and its impact on ice shelves", "projects": [{"proj_uid": "p0010184", "repository": "USAP-DC", "title": "Satellite observations and modelling of surface meltwater flow and its impact on ice shelves"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Vulnerability of Antarctica\u2019s ice shelves to meltwater-driven fracture", "uid": "601395", "west": -180.0}, {"awards": "1543229 Severinghaus, Jeffrey; 1543267 Brook, Edward J.", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Thu, 22 Oct 2020 00:00:00 GMT", "description": "Stable isotope ratios of atmospheric krypton, argon, nitrogen and oxygen were measured in late-Holocene ice core samples from nine sites in Antarctica and Greenland, for the purpose of calibrating the Kr-86 excess proxy as defined in Buizert and Severinghaus (2016).", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Bruce Plateau; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Greenland Ice Cap; Ice Core; Ice Core Chemistry; Ice Core Records; James Ross Island; Krypton; Law Dome; Low Dome Ice Core; Roosevelt Island; Siple Dome; Siple Dome Ice Core; South Pole; SPICEcore; WAIS Divide; WAIS Divide Ice Core", "locations": "Roosevelt Island; Siple Dome; James Ross Island; Bruce Plateau; Law Dome; South Pole; WAIS Divide; Antarctica; Greenland Ice Cap", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Buizert, Christo; Shackleton, Sarah; Severinghaus, Jeffrey P.; Brook, Edward J.; Baggenstos, Daniel; Bereiter, Bernhard; Etheridge, David; Bertler, Nancy; Pyne, Rebecca L.; Mulvaney, Robert; Mosley-Thompson, Ellen", "project_titles": "Collaborative research: Kr-86 as a proxy for barometric pressure variability and movement of the SH westerlies during the last\r\ndeglaciation", "projects": [{"proj_uid": "p0010037", "repository": "USAP-DC", "title": "Collaborative research: Kr-86 as a proxy for barometric pressure variability and movement of the SH westerlies during the last\r\ndeglaciation"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core; SPICEcore; Siple Dome Ice Core", "south": -90.0, "title": "Multi-site ice core Krypton stable isotope ratios", "uid": "601394", "west": -180.0}, {"awards": "1745116 Scambos, Ted", "bounds_geometry": ["POLYGON((-72 -70.75,-71.95 -70.75,-71.9 -70.75,-71.85 -70.75,-71.8 -70.75,-71.75 -70.75,-71.7 -70.75,-71.65 -70.75,-71.6 -70.75,-71.55 -70.75,-71.5 -70.75,-71.5 -70.775,-71.5 -70.8,-71.5 -70.825,-71.5 -70.85,-71.5 -70.875,-71.5 -70.9,-71.5 -70.925,-71.5 -70.95,-71.5 -70.975,-71.5 -71,-71.55 -71,-71.6 -71,-71.65 -71,-71.7 -71,-71.75 -71,-71.8 -71,-71.85 -71,-71.9 -71,-71.95 -71,-72 -71,-72 -70.975,-72 -70.95,-72 -70.925,-72 -70.9,-72 -70.875,-72 -70.85,-72 -70.825,-72 -70.8,-72 -70.775,-72 -70.75))"], "date_created": "Wed, 21 Oct 2020 00:00:00 GMT", "description": "This dataset compiles a suite of glaciology (density, stratigraphy), hydrology (slug and dilution tests) and geophysical measurements (GPS, GPR, ApRES) to characterize a firn aquifer observed within the Wilkins Ice Shelf, Antarctica.", "east": -71.5, "geometry": ["POINT(-71.75 -70.875)"], "keywords": "Airborne Radar; Antarctica; Antarctic Peninsula; Firn; Firn Aquifer; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Hydrology; Snow/ice; Snow/Ice; Wilkins Ice Shelf", "locations": "Wilkins Ice Shelf; Antarctica; Antarctic Peninsula; Wilkins Ice Shelf", "north": -70.75, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Mi\u00e8ge, Cl\u00e9ment; Montgomery, Lynn; Miller, Julie; Scambos, Ted; Wallin, Bruce; Miller, Olivia; Solomon, Kip; Forster, Richard; Koenig, Lora", "project_titles": "Antarctic Firn Aquifers: Extent, Characteristics, and Comparison with Greenland Occurrences", "projects": [{"proj_uid": "p0010126", "repository": "USAP-DC", "title": "Antarctic Firn Aquifers: Extent, Characteristics, and Comparison with Greenland Occurrences"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -71.0, "title": "Density, hydrology and geophysical measurements from the Wilkins Ice Shelf firn aquifer", "uid": "601390", "west": -72.0}, {"awards": "1443386 Emslie, Steven", "bounds_geometry": ["POLYGON((-58.62 -62.257,-58.6199 -62.257,-58.6198 -62.257,-58.6197 -62.257,-58.6196 -62.257,-58.6195 -62.257,-58.6194 -62.257,-58.6193 -62.257,-58.6192 -62.257,-58.6191 -62.257,-58.619 -62.257,-58.619 -62.2571,-58.619 -62.2572,-58.619 -62.2573,-58.619 -62.2574,-58.619 -62.2575,-58.619 -62.2576,-58.619 -62.2577,-58.619 -62.2578,-58.619 -62.2579,-58.619 -62.258,-58.6191 -62.258,-58.6192 -62.258,-58.6193 -62.258,-58.6194 -62.258,-58.6195 -62.258,-58.6196 -62.258,-58.6197 -62.258,-58.6198 -62.258,-58.6199 -62.258,-58.62 -62.258,-58.62 -62.2579,-58.62 -62.2578,-58.62 -62.2577,-58.62 -62.2576,-58.62 -62.2575,-58.62 -62.2574,-58.62 -62.2573,-58.62 -62.2572,-58.62 -62.2571,-58.62 -62.257))"], "date_created": "Sun, 11 Oct 2020 00:00:00 GMT", "description": "Many types of animal tissues are increasingly being used for stable isotope analysis, with their application dependent on the time frame they reflect and their availability for collection. Here, we investigated the isotopic values (\u03b413C and \u03b415N) of four tissues (feather, skin, toenail, and bone) collected from fledgling-period chick carcasses of three species of pygoscelid penguins to compare the variability and accuracy of the data among tissues. Samples were collected at 25 de Mayo/King George Island during the 2017/18 austral summer. Chick carcasses are commonly found at active penguin colonies, and \u201copportunistic sampling\u201d can easily be performed without disturbing nesting penguins. A total of 25\u201336 carcasses per species were sampled at active colonies of Ad\u00e9lie Pygoscelis adeliae, Gentoo P. papua, and Chinstrap P. antarcticus penguins. A linear mixed model showed that \u03b413C values varied significantly between tissues, presumably due to tissue-specific isotopic discrimination. In contrast, the only tissue with significantly different \u03b415N values was toenail. Stable isotope data revealed dietary differences among species, with Gentoo Penguins having higher average isotopic values in tissues compared to Ad\u00e9lie and Chinstrap penguins. In addition, Chinstrap Penguins showed a consistent, but not statistically significant, trend in having higher \u03b413C values compared to Ad\u00e9lie Penguins. Gentoo Penguins displayed the highest isotopic variability of any species for all tissues. Isotopic composition was most variable in skin in all three species making skin the least reliable tissue for isotope analysis, whereas isotopic values were least variable in toenails. Comparison of isotopic values between two bones (tibiotarsus and coracoid) showed no significant differences in isotopic values, indicating that when the same bone is not available for sampling from carcasses, sampling of any major skeletal element is likely to provide a meaningful comparison. These results allow for more informed opportunistic sampling to accurately estimate and compare penguin diet among species and between ancient and active colonies.", "east": -58.619, "geometry": ["POINT(-58.6195 -62.2575)"], "keywords": "25 De Mayo/King George Island; Antarctica; Biota; Delta 13C; Delta 15N; Dietary Shifts; Opportunistic Sampling; Penguin; Pygoscelis Penguins; Stranger Point", "locations": "Stranger Point; Antarctica; 25 De Mayo/King George Island", "north": -62.257, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Ciriani, Yanina; Emslie, Steven D.", "project_titles": "Collaborative Research: Investigating Holocene Shifts in the Diets and Paleohistory of Antarctic Krill Predators", "projects": [{"proj_uid": "p0010047", "repository": "USAP-DC", "title": "Collaborative Research: Investigating Holocene Shifts in the Diets and Paleohistory of Antarctic Krill Predators"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -62.258, "title": "Stable isotope analysis of multiple tissues from chick carcasses of three pygoscelid penguins in Antarctica", "uid": "601382", "west": -58.62}, {"awards": "1804154 Sowers, Todd; 1443472 Brook, Edward J.; 1643394 Buizert, Christo; 1443336 Osterberg, Erich; 1141839 Steig, Eric; 1443710 Severinghaus, Jeffrey; 1443397 Kreutz, Karl; 1443464 Sowers, Todd; 1142517 Aydin, Murat; 1443470 Aydin, Murat", "bounds_geometry": ["POINT(-99.16 -89.99)"], "date_created": "Fri, 09 Oct 2020 00:00:00 GMT", "description": "We present the methane (CH4) concentration data for the South Pole ice core (SPC14). CH4 concentrations were measured jointly at Oregon State University and Pennsylvania State University. All depths are in meters below the surface. Methane data have been corrected for blank offsets, solubility, and gravitational fractionation. All ages are in years before 1950 C.E. on the SP19 gas chronology. ", "east": -99.16, "geometry": ["POINT(-99.16 -89.99)"], "keywords": "Antarctica; Ch4; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Data; Ice Core Records; Methane; South Pole; SPICEcore", "locations": "Antarctica; South Pole; Antarctica", "north": -89.99, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology; Antarctic Ocean and Atmospheric Sciences", "persons": "Severinghaus, Jeffrey P.; Epifanio, Jenna; Brook, Edward J.; Buizert, Christo; Kreutz, Karl; Aydin, Murat; Edwards, Jon S.; Sowers, Todd A.; Kahle, Emma; Steig, Eric J.; Winski, Dominic A.; Osterberg, Erich; Fudge, T. J.; Hood, Ekaterina; Kalk, Michael; Ferris, David G.; Kennedy, Joshua A.", "project_titles": "Carbonyl Sulfide, Methyl Chloride, and Methyl Bromide Measurements in the New Intermediate-depth South Pole Ice Core; Collaborative Research: A 1500m Ice Core from South Pole; Collaborative Research: Inert Gas and Methane Based Climate Records throughout the South Pole Deep Ice Core; Collaborative Research: South Pole Ice Core Chronology and Climate Records using Chemical and Microparticle Measurements", "projects": [{"proj_uid": "p0010089", "repository": "USAP-DC", "title": "Carbonyl Sulfide, Methyl Chloride, and Methyl Bromide Measurements in the New Intermediate-depth South Pole Ice Core"}, {"proj_uid": "p0010051", "repository": "USAP-DC", "title": "Collaborative Research: South Pole Ice Core Chronology and Climate Records using Chemical and Microparticle Measurements"}, {"proj_uid": "p0010060", "repository": "USAP-DC", "title": "Collaborative Research: A 1500m Ice Core from South Pole"}, {"proj_uid": "p0010005", "repository": "USAP-DC", "title": "Collaborative Research: Inert Gas and Methane Based Climate Records throughout the South Pole Deep Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -89.99, "title": "South Pole ice core (SPC14) discrete methane data", "uid": "601381", "west": -99.16}, {"awards": "1643394 Buizert, Christo; 1142517 Aydin, Murat; 1804154 Sowers, Todd; 1443464 Sowers, Todd; 1141839 Steig, Eric; 1443105 Steig, Eric; 1443710 Severinghaus, Jeffrey; 1443397 Kreutz, Karl; 1443472 Brook, Edward J.; 1443470 Aydin, Murat", "bounds_geometry": ["POINT(99.16 -89.99)"], "date_created": "Fri, 09 Oct 2020 00:00:00 GMT", "description": "We present the SP19 gas chronology for the South Pole ice core. The chronology is based on stratigraphic matching of abrupt methane (CH4) changes. To construct the chronology, abrupt changes in CH4 during the glacial period and small, 20-30ppb, centennial scale changes in CH4 were used with analogous data from the West Antarctic Ice Sheet Divide ice core. Stratigraphic matching was verified by an optimization algorithm. The ages cover the last 52,586 years. Absolute uncertainty increases with depth until \u00b1 540 years. ", "east": 99.16, "geometry": ["POINT(99.16 -89.99)"], "keywords": "Antarctica; Ch4; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Ice Core Stratigraphy; Methane; South Pole; SPICEcore", "locations": "South Pole; Antarctica; Antarctica", "north": -89.99, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology; Antarctic Ocean and Atmospheric Sciences; Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology", "persons": "Epifanio, Jenna", "project_titles": "Carbonyl Sulfide, Methyl Chloride, and Methyl Bromide Measurements in the New Intermediate-depth South Pole Ice Core; Collaborative Research: A 1500m Ice Core from South Pole; Collaborative Research: Inert Gas and Methane Based Climate Records throughout the South Pole Deep Ice Core; Collaborative Research: Record of the Triple-oxygen Isotope and Hydrogen Isotope Composition of Ice from an Ice Core at South Pole", "projects": [{"proj_uid": "p0010065", "repository": "USAP-DC", "title": "Collaborative Research: Record of the Triple-oxygen Isotope and Hydrogen Isotope Composition of Ice from an Ice Core at South Pole"}, {"proj_uid": "p0010005", "repository": "USAP-DC", "title": "Collaborative Research: Inert Gas and Methane Based Climate Records throughout the South Pole Deep Ice Core"}, {"proj_uid": "p0010060", "repository": "USAP-DC", "title": "Collaborative Research: A 1500m Ice Core from South Pole"}, {"proj_uid": "p0010089", "repository": "USAP-DC", "title": "Carbonyl Sulfide, Methyl Chloride, and Methyl Bromide Measurements in the New Intermediate-depth South Pole Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -89.99, "title": "SP19 Gas Chronology", "uid": "601380", "west": 99.16}, {"awards": "1724670 Williams, Trevor", "bounds_geometry": ["POLYGON((-50 -62,-49 -62,-48 -62,-47 -62,-46 -62,-45 -62,-44 -62,-43 -62,-42 -62,-41 -62,-40 -62,-40 -62.3,-40 -62.6,-40 -62.9,-40 -63.2,-40 -63.5,-40 -63.8,-40 -64.1,-40 -64.4,-40 -64.7,-40 -65,-41 -65,-42 -65,-43 -65,-44 -65,-45 -65,-46 -65,-47 -65,-48 -65,-49 -65,-50 -65,-50 -64.7,-50 -64.4,-50 -64.1,-50 -63.8,-50 -63.5,-50 -63.2,-50 -62.9,-50 -62.6,-50 -62.3,-50 -62))"], "date_created": "Mon, 05 Oct 2020 00:00:00 GMT", "description": "This dataset contains 40Ar/39Ar measurements on detrital mineral grains from ice-rafted detritus from sediment core PS1575-1 in the NW Weddell Sea. The depositional age of the sediments is approx. 0 to 300 ka. ", "east": -40.0, "geometry": ["POINT(-45 -63.5)"], "keywords": "40Ar/39Ar Thermochronology; Antarctica; Argon; Chemistry:sediment; Chemistry:Sediment; Detrital Minerals; Glaciers/ice Sheet; Glaciers/Ice Sheet; Marine Geoscience; Mass Spectrometer; Provenance; R/v Polarstern; Sediment Core Data; Subglacial Till; Till; Weddell Sea", "locations": "Weddell Sea; Antarctica", "north": -62.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Williams, Trevor", "project_titles": "Collaborative Research: Deglacial Ice Dynamics in the Weddell Sea Embayment using Sediment Provenance", "projects": [{"proj_uid": "p0010128", "repository": "USAP-DC", "title": "Collaborative Research: Deglacial Ice Dynamics in the Weddell Sea Embayment using Sediment Provenance"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.0, "title": "Argon thermochronological data on detrital mineral grains from the Weddell Sea embayment", "uid": "601379", "west": -50.0}, {"awards": "1724670 Williams, Trevor", "bounds_geometry": ["POLYGON((-65 -74,-61 -74,-57 -74,-53 -74,-49 -74,-45 -74,-41 -74,-37 -74,-33 -74,-29 -74,-25 -74,-25 -74.6,-25 -75.2,-25 -75.8,-25 -76.4,-25 -77,-25 -77.6,-25 -78.2,-25 -78.8,-25 -79.4,-25 -80,-29 -80,-33 -80,-37 -80,-41 -80,-45 -80,-49 -80,-53 -80,-57 -80,-61 -80,-65 -80,-65 -79.4,-65 -78.8,-65 -78.2,-65 -77.6,-65 -77,-65 -76.4,-65 -75.8,-65 -75.2,-65 -74.6,-65 -74))"], "date_created": "Mon, 05 Oct 2020 00:00:00 GMT", "description": "This dataset contains 40Ar/39Ar measurements on detrital mineral grains from subglacial till and proximal glacimarine sediment from nine sediment cores along the front of the Filchner and Ronne Ice Shelves. ", "east": -25.0, "geometry": ["POINT(-45 -77)"], "keywords": "40Ar/39Ar Thermochronology; Antarctica; Argon; Chemistry:sediment; Chemistry:Sediment; Detrital Minerals; Glaciers/ice Sheet; Glaciers/Ice Sheet; Marine Sediments; Mass Spectrometer; Provenance; R/v Polarstern; Sediment Core Data; Subglacial Till; Till; Weddell Sea", "locations": "Antarctica; Weddell Sea", "north": -74.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Williams, Trevor", "project_titles": "Collaborative Research: Deglacial Ice Dynamics in the Weddell Sea Embayment using Sediment Provenance", "projects": [{"proj_uid": "p0010128", "repository": "USAP-DC", "title": "Collaborative Research: Deglacial Ice Dynamics in the Weddell Sea Embayment using Sediment Provenance"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.0, "title": "Argon thermochronological data on detrital mineral grains from the Weddell Sea embayment", "uid": "601378", "west": -65.0}, {"awards": "1724670 Williams, Trevor", "bounds_geometry": ["POLYGON((-70 -80,-65 -80,-60 -80,-55 -80,-50 -80,-45 -80,-40 -80,-35 -80,-30 -80,-25 -80,-20 -80,-20 -80.6,-20 -81.2,-20 -81.8,-20 -82.4,-20 -83,-20 -83.6,-20 -84.2,-20 -84.8,-20 -85.4,-20 -86,-25 -86,-30 -86,-35 -86,-40 -86,-45 -86,-50 -86,-55 -86,-60 -86,-65 -86,-70 -86,-70 -85.4,-70 -84.8,-70 -84.2,-70 -83.6,-70 -83,-70 -82.4,-70 -81.8,-70 -81.2,-70 -80.6,-70 -80))"], "date_created": "Mon, 05 Oct 2020 00:00:00 GMT", "description": "This dataset contains 40Ar/39Ar measurements on detrital mineral grains from till in modern moraines at the edges of the Institute, Foundation, Academy, Recovery, and the Slessor glaciers / ice streams.", "east": -20.0, "geometry": ["POINT(-45 -83)"], "keywords": "40Ar/39Ar Thermochronology; Antarctica; Argon; Chemistry:sediment; Chemistry:Sediment; Detrital Minerals; Glaciers/ice Sheet; Glaciers/Ice Sheet; Marine Sediments; Mass Spectrometer; Provenance; R/v Polarstern; Sediment Core Data; Subglacial Till; Till; Weddell Sea", "locations": "Antarctica; Weddell Sea", "north": -80.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Williams, Trevor", "project_titles": "Collaborative Research: Deglacial Ice Dynamics in the Weddell Sea Embayment using Sediment Provenance", "projects": [{"proj_uid": "p0010128", "repository": "USAP-DC", "title": "Collaborative Research: Deglacial Ice Dynamics in the Weddell Sea Embayment using Sediment Provenance"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -86.0, "title": "Argon thermochronological data on detrital mineral grains from the Weddell Sea embayment", "uid": "601377", "west": -70.0}, {"awards": "1443213 Kaplan, Michael", "bounds_geometry": null, "date_created": "Wed, 30 Sep 2020 00:00:00 GMT", "description": "Input and other information for 3He surface exposure data", "east": null, "geometry": null, "keywords": "Antarctica; Transantarctic Mountains", "locations": "Transantarctic Mountains; Antarctica", "north": null, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Kaplan, Michael; Winckler, Gisela; Schaefer, Joerg", "project_titles": "Collaborative Research: Multidisciplinary Analysis of Antarctic Blue Ice Moraine Formation and their Potential as Climate Archives over Multiple Glacial Cycles", "projects": [{"proj_uid": "p0010131", "repository": "USAP-DC", "title": "Collaborative Research: Multidisciplinary Analysis of Antarctic Blue Ice Moraine Formation and their Potential as Climate Archives over Multiple Glacial Cycles"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "3He input data", "uid": "601376", "west": null}, {"awards": "1443213 Kaplan, Michael", "bounds_geometry": ["POLYGON((-180 -84.1,-176.97 -84.1,-173.94 -84.1,-170.91 -84.1,-167.88 -84.1,-164.85 -84.1,-161.82 -84.1,-158.79 -84.1,-155.76 -84.1,-152.73 -84.1,-149.7 -84.1,-149.7 -84.43,-149.7 -84.76,-149.7 -85.09,-149.7 -85.42,-149.7 -85.75,-149.7 -86.08,-149.7 -86.41,-149.7 -86.74,-149.7 -87.07,-149.7 -87.4,-152.73 -87.4,-155.76 -87.4,-158.79 -87.4,-161.82 -87.4,-164.85 -87.4,-167.88 -87.4,-170.91 -87.4,-173.94 -87.4,-176.97 -87.4,180 -87.4,178.12 -87.4,176.24 -87.4,174.36 -87.4,172.48 -87.4,170.6 -87.4,168.72 -87.4,166.84 -87.4,164.96 -87.4,163.08 -87.4,161.2 -87.4,161.2 -87.07,161.2 -86.74,161.2 -86.41,161.2 -86.08,161.2 -85.75,161.2 -85.42,161.2 -85.09,161.2 -84.76,161.2 -84.43,161.2 -84.1,163.08 -84.1,164.96 -84.1,166.84 -84.1,168.72 -84.1,170.6 -84.1,172.48 -84.1,174.36 -84.1,176.24 -84.1,178.12 -84.1,-180 -84.1))"], "date_created": "Wed, 30 Sep 2020 00:00:00 GMT", "description": "Sample metadata or information for cosmogenic-nuclide exposure data from the Mt. Achernar area.", "east": -149.7, "geometry": ["POINT(-174.25 -85.75)"], "keywords": "Antarctica; Cosmogenic Dating; Transantarctic Mountains", "locations": "Transantarctic Mountains; Antarctica", "north": -84.1, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Kaplan, Michael; Schaefer, Joerg; Winckler, Gisela", "project_titles": "Collaborative Research: Multidisciplinary Analysis of Antarctic Blue Ice Moraine Formation and their Potential as Climate Archives over Multiple Glacial Cycles", "projects": [{"proj_uid": "p0010131", "repository": "USAP-DC", "title": "Collaborative Research: Multidisciplinary Analysis of Antarctic Blue Ice Moraine Formation and their Potential as Climate Archives over Multiple Glacial Cycles"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -87.4, "title": "10Be and 26Al cosmogenic nuclide surface exposure data", "uid": "601375", "west": 161.2}, {"awards": "1443386 Emslie, Steven", "bounds_geometry": ["POINT(162.95 -75.55)"], "date_created": "Thu, 24 Sep 2020 00:00:00 GMT", "description": "This dataset provides the results of radiocarbon and stable isotope analyses of Adelie penguin chick bone collagen.", "east": 162.95, "geometry": ["POINT(162.95 -75.55)"], "keywords": "Adelie Penguin; Antarctica; Cape Irizar; Drygalski Ice Tongue; Ross Sea; Stable Isotopes", "locations": "Antarctica; Ross Sea; Cape Irizar; Drygalski Ice Tongue", "north": -75.55, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Emslie, Steven D.", "project_titles": "Collaborative Research: Investigating Holocene Shifts in the Diets and Paleohistory of Antarctic Krill Predators", "projects": [{"proj_uid": "p0010047", "repository": "USAP-DC", "title": "Collaborative Research: Investigating Holocene Shifts in the Diets and Paleohistory of Antarctic Krill Predators"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -75.55, "title": "Ancient Adelie penguin colony revealed by snowmelt at Cape Irizar, Ross Sea, Antarctica", "uid": "601374", "west": 162.95}, {"awards": "1644187 Tulaczyk, Slawek", "bounds_geometry": ["POLYGON((161 -76.9,161.75 -76.9,162.5 -76.9,163.25 -76.9,164 -76.9,164.75 -76.9,165.5 -76.9,166.25 -76.9,167 -76.9,167.75 -76.9,168.5 -76.9,168.5 -77.04,168.5 -77.18,168.5 -77.32,168.5 -77.46,168.5 -77.6,168.5 -77.74,168.5 -77.88,168.5 -78.02,168.5 -78.16,168.5 -78.3,167.75 -78.3,167 -78.3,166.25 -78.3,165.5 -78.3,164.75 -78.3,164 -78.3,163.25 -78.3,162.5 -78.3,161.75 -78.3,161 -78.3,161 -78.16,161 -78.02,161 -77.88,161 -77.74,161 -77.6,161 -77.46,161 -77.32,161 -77.18,161 -77.04,161 -76.9))"], "date_created": "Sat, 12 Sep 2020 00:00:00 GMT", "description": "The ANTAEM survey was carried out in the period November 12th to 28th, 2018, with the SkyTEM 312 system. Twenty-one missions (flights) were conducted over 11 production days of helicopter service, resulting in a total of approximately ~3400 line km of data. The SkyTEM system records data from take-off until landing resulting in multiple lines converging to the landing pads in McMurdo and at Marble Point. The production without overlapping lines adds up to approximately 2900 line km. The flight speed was approximately 120 km/h at a target flight altitude of ~50 m (sensor height), but the actual sensor height varies depending on the terrain. The surveys were carried out with a Bell 212 helicopter, which carried the SkyTEM sensor as a sling load. The SkyTEM system was configured in a standard two-moment setup (low moment, LM and high moment, HM). Areas with extremely resistive dry and/or frozen sediment/bedrock, and glacier ice often produce EM-signals with amplitudes below the detection level of the system. Data from these low signal environments cannot be inverted into resistivity models. Data with strong induced polarization effects cannot be inverted for resistivity either. These data were discharged in this standard data delivery. \r\n The EM-data and inversion result (resistivity models) are delivered in the SkyTEM2018_dat.xyz and SkyTEM2018_inv.xyz files respectably. The RECORD number in the two files links data and model together. EM-data and data uncertainty for data entering inversion. Info stated in file Header: NAN value, Data unit, Coordinate system, Gate times. The SkyTEM system uses at High-Low moment data recording cycle, therefore only a subset of the total 40 time gates are preset for each moment. The standard lateral constraints inversion (LCI), delivered in the SkyTEM2018_inv.xyz file, was carried out with a smooth 30 layered resistivity model discretized to a depth of 500 m. A depth of investigation (DOI) was estimated for each resistivity model.\r\n", "east": 168.5, "geometry": ["POINT(164.75 -77.6)"], "keywords": "Antarctica; Dry Valleys; Hydrology; Ice Shelf; McMurdo; Permafrost", "locations": "McMurdo; Antarctica; Dry Valleys", "north": -76.9, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Tulaczyk, Slawek", "project_titles": "Collaborative Research: Antarctic Airborne ElectroMagnetics (ANTAEM) - Revealing Subsurface Water in Coastal Antarctica", "projects": [{"proj_uid": "p0010129", "repository": "USAP-DC", "title": "Collaborative Research: Antarctic Airborne ElectroMagnetics (ANTAEM) - Revealing Subsurface Water in Coastal Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.3, "title": "ANTAEM project airborne EM resistivity data from McMurdo Region", "uid": "601373", "west": 161.0}, {"awards": "1543452 Blankenship, Donald; 0733025 Blankenship, Donald; 1443690 Young, Duncan; 0636724 Blankenship, Donald", "bounds_geometry": ["POLYGON((80 -65,89 -65,98 -65,107 -65,116 -65,125 -65,134 -65,143 -65,152 -65,161 -65,170 -65,170 -66.5,170 -68,170 -69.5,170 -71,170 -72.5,170 -74,170 -75.5,170 -77,170 -78.5,170 -80,161 -80,152 -80,143 -80,134 -80,125 -80,116 -80,107 -80,98 -80,89 -80,80 -80,80 -78.5,80 -77,80 -75.5,80 -74,80 -72.5,80 -71,80 -69.5,80 -68,80 -66.5,80 -65))"], "date_created": "Mon, 24 Aug 2020 00:00:00 GMT", "description": "The International Collaborative Exploration of the Cryosphere though Airborne Profiling (ICECAP) collected five seasons of aerogeophysical data data through the NSFs International Polar Year and NASAs Operation Ice Bridge programs in East Antarctica, using the coherent HiCARS 60 MHz radar system. By comparing echo strengths for different focusing apertures, and accounting for the ranges and angles involved, we can derive the \"specularity content\" of the bed echo, a proxy for small scale bed roughness and a good indicator for subglacial water pressure in regions of distributed subglacial water (Schroeder et al., 2014, IEEE GRSL, 10.1109/LGRS.2014.2337878; IEEE; Dow et al., 2019, EPSL https://doi.org/10.1016/j.epsl.2019.115961). Specularity data are inherently noisy, so these products have been smoothed with a 1 km filter.", "east": 170.0, "geometry": ["POINT(125 -72.5)"], "keywords": "Antarctica; East Antarctica; ICECAP; Ice Penetrating Radar; Radar Echo Sounder; Radar Echo Sounding; Subglacial Hydrology", "locations": "East Antarctica; Antarctica", "north": -65.0, "nsf_funding_programs": "Antarctic Integrated System Science; Antarctic Glaciology; Antarctic Earth Sciences; Antarctic Earth Sciences", "persons": "Young, Duncan A.; Blankenship, Donald D.; Roberts, Jason; Siegert, Martin; van Ommen, Tas; Greenbaum, Jamin; Schroeder, Dustin", "project_titles": "Collaborative Research: Southern Plateau Ice-sheet Characterization and Evolution of the Central Antarctic Plate (SPICECAP); Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System; East Antarctic Grounding Line Experiment (EAGLE); IPY Research: Investigating the Cryospheric Evolution of the Central Antarctic Plate (ICECAP)", "projects": [{"proj_uid": "p0010115", "repository": "USAP-DC", "title": "Collaborative Research: Southern Plateau Ice-sheet Characterization and Evolution of the Central Antarctic Plate (SPICECAP)"}, {"proj_uid": "p0000254", "repository": "USAP-DC", "title": "East Antarctic Grounding Line Experiment (EAGLE)"}, {"proj_uid": "p0000174", "repository": "USAP-DC", "title": "Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System"}, {"proj_uid": "p0000719", "repository": "USAP-DC", "title": "IPY Research: Investigating the Cryospheric Evolution of the Central Antarctic Plate (ICECAP)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.0, "title": "ICECAP Basal Interface Specularity Content Profiles: IPY and OIB", "uid": "601371", "west": 80.0}, {"awards": "1341494 Gao, Yuan", "bounds_geometry": ["POINT(64 64)"], "date_created": "Mon, 24 Aug 2020 00:00:00 GMT", "description": "The dataset includes the concentrations and particle size distributions of aerosol trace elements (TEs) through the sampling of size-segregated aerosol particles made at Palmer Station, Antarctic Peninsula, which took place in the austral summer of 2016-2017. The estimated dry deposition fluxes of these elements were derived from these new results.", "east": 64.0, "geometry": ["POINT(64 64)"], "keywords": "Antarctica; Antarctic Peninsula; Palmer Station; Trace Elements", "locations": "Palmer Station; Antarctic Peninsula; Antarctica; Palmer Station", "north": 64.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Gao, Yuan", "project_titles": "Quantifying Atmospheric Iron Properties over West Antarctic Peninsula", "projects": [{"proj_uid": "p0010082", "repository": "USAP-DC", "title": "Quantifying Atmospheric Iron Properties over West Antarctic Peninsula"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": 64.0, "title": "Concentrations and Particle Size Distributions of Aerosol Trace Elements", "uid": "601370", "west": 64.0}, {"awards": "1443471 Koutnik, Michelle", "bounds_geometry": ["POLYGON((-180 -89,-166.5 -89,-153 -89,-139.5 -89,-126 -89,-112.5 -89,-99 -89,-85.5 -89,-72 -89,-58.5 -89,-45 -89,-45 -89.1,-45 -89.2,-45 -89.3,-45 -89.4,-45 -89.5,-45 -89.6,-45 -89.7,-45 -89.8,-45 -89.9,-45 -90,-58.5 -90,-72 -90,-85.5 -90,-99 -90,-112.5 -90,-126 -90,-139.5 -90,-153 -90,-166.5 -90,180 -90,173 -90,166 -90,159 -90,152 -90,145 -90,138 -90,131 -90,124 -90,117 -90,110 -90,110 -89.9,110 -89.8,110 -89.7,110 -89.6,110 -89.5,110 -89.4,110 -89.3,110 -89.2,110 -89.1,110 -89,117 -89,124 -89,131 -89,138 -89,145 -89,152 -89,159 -89,166 -89,173 -89,-180 -89))"], "date_created": "Thu, 20 Aug 2020 00:00:00 GMT", "description": "This data set contains ice-penetrating radar measurements of surface topography, ice thickness, internal stratigraphy, and derived bed topography in the vicinity of South Pole.", "east": -45.0, "geometry": ["POINT(-147.5 -89.5)"], "keywords": "Antarctica; Ice Sheet", "locations": "Antarctica; Antarctica", "north": -89.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Waddington, Edwin D.; Conway, Howard; Koutnik, Michelle; Fudge, T. J.; Lilien, David; Stevens, Max", "project_titles": "Collaborative Research: Characterization of Upstream Ice and Firn Dynamics affecting the South Pole Ice Core", "projects": [{"proj_uid": "p0000200", "repository": "USAP-DC", "title": "Collaborative Research: Characterization of Upstream Ice and Firn Dynamics affecting the South Pole Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -90.0, "title": "7MHz radar in the vicinity of South Pole", "uid": "601369", "west": 110.0}, {"awards": "1745049 Tyler, Scott", "bounds_geometry": ["POLYGON((-180 43.0731,-153.05989 43.0731,-126.11978 43.0731,-99.17967 43.0731,-72.23956 43.0731,-45.29945 43.0731,-18.35934 43.0731,8.58077 43.0731,35.52088 43.0731,62.46099 43.0731,89.4011 43.0731,89.4011 43.07309,89.4011 43.07308,89.4011 43.07307,89.4011 43.07306,89.4011 43.07305,89.4011 43.07304,89.4011 43.07303,89.4011 43.07302,89.4011 43.07301,89.4011 43.073,62.46099 43.073,35.52088 43.073,8.58077 43.073,-18.35934 43.073,-45.29945 43.073,-72.23956 43.073,-99.17967 43.073,-126.11978 43.073,-153.05989 43.073,180 43.073,170.94012 43.073,161.88024 43.073,152.82036 43.073,143.76048 43.073,134.7006 43.073,125.64072 43.073,116.58084 43.073,107.52096 43.073,98.46108 43.073,89.4012 43.073,89.4012 43.07301,89.4012 43.07302,89.4012 43.07303,89.4012 43.07304,89.4012 43.07305,89.4012 43.07306,89.4012 43.07307,89.4012 43.07308,89.4012 43.07309,89.4012 43.0731,98.46108 43.0731,107.52096 43.0731,116.58084 43.0731,125.64072 43.0731,134.7006 43.0731,143.76048 43.0731,152.82036 43.0731,161.88024 43.0731,170.94012 43.0731,-180 43.0731))"], "date_created": "Mon, 03 Aug 2020 00:00:00 GMT", "description": "This dataset consists of individual Distributed Temperature Sensing (DTS) traces taken during the first melt test of the Ice Diver drill. The data consists of header information about the instrument, time of sampling and follows with distance down the fiber, Stokes return, anti-Stokes return and estimated temperature in C. Each file represents a 30 second integration of return signals, and the spatial sampling of the fiber was 12.5 cm. Two channels are included and represent data from two individual multimode fibers within a stainless steel tube cable.", "east": 89.4011, "geometry": ["POINT(-90.59885 43.07305)"], "keywords": "Antarctica; North America; Temperature", "locations": "North America; Antarctica", "north": 43.0731, "nsf_funding_programs": "Antarctic Instrumentation and Support", "persons": "Tyler, Scott W.", "project_titles": "Collaborative Research: Toward Dense Observation of Geothermal Fluxes in Antarctica Via Logistically Light Instrument Deployment", "projects": [{"proj_uid": "p0010121", "repository": "USAP-DC", "title": "Collaborative Research: Toward Dense Observation of Geothermal Fluxes in Antarctica Via Logistically Light Instrument Deployment"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": 43.073, "title": "Ice Diver Madison Run #1 March 1, 2020", "uid": "601368", "west": 89.4012}, {"awards": "1644245 Aydin, Murat", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Thu, 30 Jul 2020 00:00:00 GMT", "description": "This is a data set of ice core air ethane and acetylene measurements. Both gases were analyzed in air extracted from the South Pole SPC14 ice core at 149 discrete depths as shown in the data file. Ice core air was extracted using a wet extraction method. This data set includes the ethane and acetylene measurements from the younger (last 2ky) sections of the SPC14 ice core published separately in an earlier data set from the same ice core (doi:10.18739/A2J09W45H). ", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Ethane", "locations": "Antarctica; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Aydin, Murat; Saltzman, Eric", "project_titles": "Ethane Measurements in the Intermediate Depth South Pole Ice Core (SPICECORE)", "projects": [{"proj_uid": "p0000762", "repository": "USAP-DC", "title": "Ethane Measurements in the Intermediate Depth South Pole Ice Core (SPICECORE)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -90.0, "title": "Ice Core Air Ethane and Acetylene Measurements - South Pole SPC14 Ice Core (SPICEcore project)", "uid": "601367", "west": -180.0}, {"awards": "1443232 Waddington, Edwin", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Tue, 28 Jul 2020 00:00:00 GMT", "description": "These data were collected with DC and AC ECM at the NSF Ice Core Facility.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Fudge, T. J.", "project_titles": "Using Electrical Conductance Measurements to Develop the South Pole Ice Core Chronology", "projects": [{"proj_uid": "p0000378", "repository": "USAP-DC", "title": "Using Electrical Conductance Measurements to Develop the South Pole Ice Core Chronology"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -90.0, "title": "ECM (DC and AC) multi-track data and images from 2016 processing season", "uid": "601366", "west": -180.0}, {"awards": "1043167 White, James", "bounds_geometry": ["POINT(-112.1115 -79.481)"], "date_created": "Mon, 27 Jul 2020 00:00:00 GMT", "description": "The original water stable isotope data for the WAIS Divide Deep Ice Core was generated under the University of Colorado INSTAAR Stable Isotope Lab (NSF Award# 1443328). This data set contains high-resolution dD and d18O data for the West Antarctic Ice Sheet (WAIS) Divide Ice core. Drilling was initiated in 2006 and completed in 2011, and subsequent analyses on the ice were performed at the University of Colorado INSTAAR Stable Isotope Lab using Continuous Flow Analysis (CFA), completed in 2015 and described in Jones et al. (2017). The targeted resampling of the WAIS Divide Ice core (1035.4 to 1368.2 m) was completed in 2019 (NSF OPP - Antarctic Glaciology 1807522) to replace data analyzed on an older generation Laser Absorption Spectroscopy instrument. The resampling interval was identified using information theory (Garland and Jones et al. 2018). \r\n", "east": -112.1115, "geometry": ["POINT(-112.1115 -79.481)"], "keywords": "Antarctica; Delta 18O; Isotope; WAIS Divide; WAIS Divide Ice Core; West Antarctic Ice Sheet", "locations": "Antarctica; WAIS Divide; West Antarctic Ice Sheet", "north": -79.481, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Glaciology; Antarctic Glaciology", "persons": "Jones, Tyler R.; Morris, Valerie; Garland, Joshua; Vaughn, Bruce; White, James", "project_titles": "Collaborative Research: Stable Isotopes of Ice in the Transition and Glacial Sections of the WAIS Divide Deep Ice Core", "projects": [{"proj_uid": "p0000078", "repository": "USAP-DC", "title": "Collaborative Research: Stable Isotopes of Ice in the Transition and Glacial Sections of the WAIS Divide Deep Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.481, "title": "Resampling of Deep Polar Ice Cores using Information Theory", "uid": "601365", "west": -112.1115}, {"awards": "1826712 McMahon, Kelton; 1443585 Polito, Michael; 1443386 Emslie, Steven; 1443424 McMahon, Kelton", "bounds_geometry": ["POINT(-54.67855 -63.434067)"], "date_created": "Fri, 24 Jul 2020 00:00:00 GMT", "description": "This data set focuses on ornithogenic soils excavated from a test pit located in an active colony of Pygoscelis spp. penguins on Platter Island in the Danger Islands archipelago along the northeastern side of the Antarctic Peninsula in December 2015. It contains radiocarbon dates of recovered penguin tissues and the estimated age of ornithogenic soils by depth. It also contains measurements of carbon (\u03b413C) and nitrogen (\u03b415N) stable isotope values of Pygoscelis spp. penguins eggshell membrane and feather samples and Antarctic fur seal (Arctocephalus gazella) hair sample recovered from these ornithogenic soils. Accelerator Mass Spectrometry (AMS) was used to obtain radiocarbon dates at the Woods Hole National Ocean Sciences Accelerator Mass Spectrometry (NOSAMS) facility. Radiocarbon Dates were corrected for the marine carbon reservoir effect and calibrated to calendar years before present (cal years BP) using a \u0394R of 750\u2009\u00b1\u200950 years and the MARINE13 calibration curve in Calib 7.04. The rbacon package ver. 2.3.9.1 in R was used to estimate age at depth of each soil level expressed as years relative to the common era (CE). Stable isotope analyses were conducted using an elemental analyzer coupled to a continuous flow stable isotope ratio mass spectrometer at Louisiana State University. The data set also includes associated data such as excavation date, location, site names, latitude/longitude, species, date of excavation, tissue used for radiocarbon dating, and carbon to nitrogen ratios. Details of the data set and all relevant methods are provided in Kalvakaalva et. al., 2020.", "east": -54.67855, "geometry": ["POINT(-54.67855 -63.434067)"], "keywords": "Antarctica; Antarctic Peninsula; Arctocephalus Gazella; Carbon; Holocene; Nitrogen; Paleoecology; Penguin; Pygoscelis Spp.; Stable Isotope Analysis; Weddell Sea", "locations": "Weddell Sea; Antarctica; Antarctic Peninsula", "north": -63.434067, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "Kalvakaalva, Rohit; Clucas, Gemma; Herman, Rachael; Polito, Michael", "project_titles": "Collaborative Research: Investigating Holocene Shifts in the Diets and Paleohistory of Antarctic Krill Predators", "projects": [{"proj_uid": "p0010047", "repository": "USAP-DC", "title": "Collaborative Research: Investigating Holocene Shifts in the Diets and Paleohistory of Antarctic Krill Predators"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -63.434067, "title": "Radiocarbon dating and stable isotope values of penguin and seal tissues recovered from ornithogenic soils on Platter Island, Danger Islands Archipelago, Antarctic Peninsula in December 2015.", "uid": "601364", "west": -54.67855}, {"awards": "0338137 Anderson, John", "bounds_geometry": ["POLYGON((-76 -45.5,-75.2 -45.5,-74.4 -45.5,-73.6 -45.5,-72.8 -45.5,-72 -45.5,-71.2 -45.5,-70.4 -45.5,-69.6 -45.5,-68.8 -45.5,-68 -45.5,-68 -46.43,-68 -47.36,-68 -48.29,-68 -49.22,-68 -50.15,-68 -51.08,-68 -52.01,-68 -52.94,-68 -53.87,-68 -54.8,-68.8 -54.8,-69.6 -54.8,-70.4 -54.8,-71.2 -54.8,-72 -54.8,-72.8 -54.8,-73.6 -54.8,-74.4 -54.8,-75.2 -54.8,-76 -54.8,-76 -53.87,-76 -52.94,-76 -52.01,-76 -51.08,-76 -50.15,-76 -49.22,-76 -48.29,-76 -47.36,-76 -46.43,-76 -45.5))"], "date_created": "Fri, 17 Jul 2020 00:00:00 GMT", "description": "Excel file with station names, location and water depth and description of the coring device for NBP0505.", "east": -68.0, "geometry": ["POINT(-72 -50.15)"], "keywords": "Chile; Fjord; Marine Geoscience; NBP0505; R/v Nathaniel B. Palmer; Sample/collection Description; Sample/Collection Description; Sediment Core; Sediment Corer; Station List", "locations": "Chile; Chile", "north": -45.5, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Wellner, Julia; Anderson, John", "project_titles": "Collaborative Research: Controls on Sediment Yields from Tidewater Glaciers from Patagonia to Antarctica", "projects": [{"proj_uid": "p0000821", "repository": "USAP-DC", "title": "Collaborative Research: Controls on Sediment Yields from Tidewater Glaciers from Patagonia to Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -54.8, "title": "NBP0505 sediment core locations", "uid": "601362", "west": -76.0}, {"awards": "0338137 Anderson, John", "bounds_geometry": ["POLYGON((-76 -45.5,-75.2 -45.5,-74.4 -45.5,-73.6 -45.5,-72.8 -45.5,-72 -45.5,-71.2 -45.5,-70.4 -45.5,-69.6 -45.5,-68.8 -45.5,-68 -45.5,-68 -46.43,-68 -47.36,-68 -48.29,-68 -49.22,-68 -50.15,-68 -51.08,-68 -52.01,-68 -52.94,-68 -53.87,-68 -54.8,-68.8 -54.8,-69.6 -54.8,-70.4 -54.8,-71.2 -54.8,-72 -54.8,-72.8 -54.8,-73.6 -54.8,-74.4 -54.8,-75.2 -54.8,-76 -54.8,-76 -53.87,-76 -52.94,-76 -52.01,-76 -51.08,-76 -50.15,-76 -49.22,-76 -48.29,-76 -47.36,-76 -46.43,-76 -45.5))"], "date_created": "Fri, 17 Jul 2020 00:00:00 GMT", "description": "Raw CTD data from expedition NBP0505 collected with the Aanderaa and Seacat CTD systems", "east": -68.0, "geometry": ["POINT(-72 -50.15)"], "keywords": "Chile; CTD; CTD Data; Depth; Fjord; NBP0505; Oceans; Physical Oceanography; R/v Nathaniel B. Palmer; Salinity; Temperature", "locations": "Chile", "north": -45.5, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Wellner, Julia; Anderson, John", "project_titles": "Collaborative Research: Controls on Sediment Yields from Tidewater Glaciers from Patagonia to Antarctica", "projects": [{"proj_uid": "p0000821", "repository": "USAP-DC", "title": "Collaborative Research: Controls on Sediment Yields from Tidewater Glaciers from Patagonia to Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -54.8, "title": "NBP0505 CTD data", "uid": "601363", "west": -76.0}, {"awards": null, "bounds_geometry": ["POINT(-163.61187 -84.33543)"], "date_created": "Wed, 15 Jul 2020 00:00:00 GMT", "description": "This dataset contains total organic carbon (%TOC) and carbon isotopic data (\u03b4\u00b9\u00b3C, \u0394\u00b9\u2074C) from sediments retrieved from the Whillans Ice Stream grounding zone during the 2015 Antarctic field season. All %TOC and sediment preparations were done at the University of South Florida. Radiocarbon measurements were done at the National Ocean Sciences Accelerator Mass Spectrometry (NOSAMS) laboratory. ", "east": -163.61187, "geometry": ["POINT(-163.61187 -84.33543)"], "keywords": "Antarctica; Radiocarbon; Sediment; Whillans Ice Stream", "locations": "Whillans Ice Stream; Antarctica", "north": -84.33543, "nsf_funding_programs": null, "persons": "Venturelli, Ryan A", "project_titles": "Collaborative Research: Subglacial Antarctic Lakes Scientific Access (SALSA): Integrated Study of Carbon Cycling in Hydrologically-active Subglacial Environments", "projects": [{"proj_uid": "p0010119", "repository": "USAP-DC", "title": "Collaborative Research: Subglacial Antarctic Lakes Scientific Access (SALSA): Integrated Study of Carbon Cycling in Hydrologically-active Subglacial Environments"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WISSARD", "south": -84.33543, "title": "Isotopic data from Whillans Ice Stream grounding zone, West Antarctica", "uid": "601360", "west": -163.61187}, {"awards": "0636953 Saltzman, Eric; 1043780 Aydin, Murat; 0839122 Saltzman, Eric", "bounds_geometry": null, "date_created": "Wed, 15 Jul 2020 00:00:00 GMT", "description": "This is a data set of ice core carbonyl sulfide data. Carbonyl sulfide was analyzed in air extracted from the Taylor Dome M3C1 ice core at 106 discrete depths as indicated in the data file. This data set includes all COS data presented in a prior data set from the same ice core (/doi.org/10.7265/N5S75D8P) that were analyzed from 2008 through 2010. This data set includes additional data from the same ice core that were analyzed at a later date in 2014. The two sets of measurements are presented as one data set as the same extraction and analytical methods were used for both sets of analyses. Refer to the references associated with the data set for details on the methods. ", "east": null, "geometry": null, "keywords": "Antarctica; Carbonyl Sulfide; Trace Gases", "locations": "Antarctica; Antarctica", "north": null, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology", "persons": "Aydin, Murat; Saltzman, Eric", "project_titles": "Carbonyl Sulfide Measurements in the Deep West Antarctic Ice Sheet Divide Ice Core; Collaborative Research: Integrated High Resolution Chemical and Biological Measurements on the Deep WAIS Divide Core; Methyl Chloride, Methyl Bromide, and Carbonyl Sulfide in Deep Antarctic Ice Cores", "projects": [{"proj_uid": "p0000273", "repository": "USAP-DC", "title": "Collaborative Research: Integrated High Resolution Chemical and Biological Measurements on the Deep WAIS Divide Core"}, {"proj_uid": "p0000042", "repository": "USAP-DC", "title": "Methyl Chloride, Methyl Bromide, and Carbonyl Sulfide in Deep Antarctic Ice Cores"}, {"proj_uid": "p0000055", "repository": "USAP-DC", "title": "Carbonyl Sulfide Measurements in the Deep West Antarctic Ice Sheet Divide Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Ice Core Air Carbonyl Sulfide Measurements - Taylor Dome M3C1 Ice Core", "uid": "601361", "west": null}, {"awards": "0944021 Brook, Edward J.", "bounds_geometry": ["POLYGON((-163 -79,-162.8 -79,-162.6 -79,-162.4 -79,-162.2 -79,-162 -79,-161.8 -79,-161.6 -79,-161.4 -79,-161.2 -79,-161 -79,-161 -79.05,-161 -79.1,-161 -79.15,-161 -79.2,-161 -79.25,-161 -79.3,-161 -79.35,-161 -79.4,-161 -79.45,-161 -79.5,-161.2 -79.5,-161.4 -79.5,-161.6 -79.5,-161.8 -79.5,-162 -79.5,-162.2 -79.5,-162.4 -79.5,-162.6 -79.5,-162.8 -79.5,-163 -79.5,-163 -79.45,-163 -79.4,-163 -79.35,-163 -79.3,-163 -79.25,-163 -79.2,-163 -79.15,-163 -79.1,-163 -79.05,-163 -79))"], "date_created": "Mon, 13 Jul 2020 00:00:00 GMT", "description": "Data archived here were used to create the Roosevelt Island Ice Core gas age and ice age time scales. Data include methane concentrations, nitrogen and oxygen isotope ratios of N2 and O2, total air content and the D/H ratio of the ice. Derived products included here include ice age and gas age time scales. ", "east": -161.0, "geometry": ["POINT(-162 -79.25)"], "keywords": "Antarctica; CO2; Ice Core; Roosevelt Island", "locations": "Antarctica; Roosevelt Island; Roosevelt Island", "north": -79.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Brook, Edward J.; Lee, James", "project_titles": "Collaborative Research: Deglaciation of the Ross Sea Embayment - constraints from Roosevelt Island", "projects": [{"proj_uid": "p0000272", "repository": "USAP-DC", "title": "Collaborative Research: Deglaciation of the Ross Sea Embayment - constraints from Roosevelt Island"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.5, "title": "Roosevelt Island Ice Core Time Scale and Associated Data", "uid": "601359", "west": -163.0}, {"awards": "0440602 Saltzman, Eric; 0338359 Saltzman, Eric", "bounds_geometry": null, "date_created": "Fri, 10 Jul 2020 00:00:00 GMT", "description": "This is a data set of ice core carbonyl sulfide data. Carbonyl sulfide was analyzed in air extracted from the SPRESSO ice core at 106 discrete depths as indicated in the data file. SPRESSO is a shallow, dry-drilled ice core from the South Pole. ", "east": null, "geometry": null, "keywords": "Antarctica; Atmospheric Gases; Gas Measurement; Ice Core; Ice Core Gas Records; Trace Gases", "locations": "Antarctica; Antarctica", "north": null, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Aydin, Murat; Saltzman, Eric", "project_titles": "Collaborative Research: Gases in Firn Air and Shallow Ice at the Proposed WAIS Divide Drilling Site; Methyl chloride and methyl bromide in Antarctic ice cores", "projects": [{"proj_uid": "p0000368", "repository": "USAP-DC", "title": "Collaborative Research: Gases in Firn Air and Shallow Ice at the Proposed WAIS Divide Drilling Site"}, {"proj_uid": "p0000032", "repository": "USAP-DC", "title": "Methyl chloride and methyl bromide in Antarctic ice cores"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Ice Core Air Carbonyl Sulfide Measurements - SPRESSO Ice Core", "uid": "601357", "west": null}, {"awards": "1443677 Padman, Laurence; 0125602 Padman, Laurence; 0125252 Padman, Laurence", "bounds_geometry": ["POLYGON((-180 -53,-144 -53,-108 -53,-72 -53,-36 -53,0 -53,36 -53,72 -53,108 -53,144 -53,180 -53,180 -56.7,180 -60.4,180 -64.1,180 -67.8,180 -71.5,180 -75.2,180 -78.9,180 -82.6,180 -86.3,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -86.3,-180 -82.6,-180 -78.9,-180 -75.2,-180 -71.5,-180 -67.8,-180 -64.1,-180 -60.4,-180 -56.7,-180 -53))"], "date_created": "Fri, 10 Jul 2020 00:00:00 GMT", "description": "The Antarctic Tide Gauge (AntTG) database provides tidal harmonic coefficients (amplitude and phase) for ocean surface height (tide-induced height perturbation relative to the seabed) at many coastal, ocean and ice shelf locations around Antarctica. The coefficients are provided for up to 8 tidal constituents (Q1, O1, P1, K1, N2 , M2, S2, K2) where data is available. These coefficients are primarily intended for users interested in validation of tide models for the Antarctic seas including the areas covered by the floating ice shelves (e.g., King and Padman, 2005; King et al., 2011; Stammer et al., 2014). The database is provided as single files in ASCII text and MATLAB *.mat formats, as well as in a KML package that can be viewed in Google Earth. \r\n\r\nSeveral different measurement systems were used to collect the data. The quality of database entries varies widely, from short records of unknown accuracy to very precise, long-term records from bottom pressure recorders in the ocean and GPS systems installed on ice shelves. This database provides sufficient quality control information (record length, time step, and measurement type) for a user to judge whether a tidal analysis at a particular site is likely to be useful for their application.\r\n", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Oceans; Sea Surface Height; Tide Gauges; Tides", "locations": "Antarctica", "north": -53.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences; Arctic System Science; Antarctic Ocean and Atmospheric Sciences", "persons": "Howard, Susan L.; Padman, Laurence; King, Matt", "project_titles": "Ocean Tides around Antarctica and in the Southern Ocean", "projects": [{"proj_uid": "p0010116", "repository": "USAP-DC", "title": "Ocean Tides around Antarctica and in the Southern Ocean"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Antarctic Tide Gauge Database, version 1", "uid": "601358", "west": -180.0}, {"awards": "1443482 Mak, John", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Thu, 09 Jul 2020 00:00:00 GMT", "description": "Data from measurement of CO mixing ratios and stable isotopes from the South Pole Ice Core for the first ca 10,000 years BP", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; CO; Delta 13C; Delta 18O; South Pole; SPICEcore", "locations": "Antarctica; South Pole", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Mak, John", "project_titles": "Collaborative Research: Using Stable Isotopes to Constrain the Atmospheric Carbon Monoxide Budget over the Last 20,000 Years", "projects": [{"proj_uid": "p0010117", "repository": "USAP-DC", "title": "Collaborative Research: Using Stable Isotopes to Constrain the Atmospheric Carbon Monoxide Budget over the Last 20,000 Years"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -90.0, "title": "Carbon monoxide mixing ratios and stable isotopic values, SPICE", "uid": "601356", "west": -180.0}, {"awards": "1443690 Young, Duncan", "bounds_geometry": ["POLYGON((110 -68,113 -68,116 -68,119 -68,122 -68,125 -68,128 -68,131 -68,134 -68,137 -68,140 -68,140 -68.7,140 -69.4,140 -70.1,140 -70.8,140 -71.5,140 -72.2,140 -72.9,140 -73.6,140 -74.3,140 -75,137 -75,134 -75,131 -75,128 -75,125 -75,122 -75,119 -75,116 -75,113 -75,110 -75,110 -74.3,110 -73.6,110 -72.9,110 -72.2,110 -71.5,110 -70.8,110 -70.1,110 -69.4,110 -68.7,110 -68))"], "date_created": "Tue, 07 Jul 2020 00:00:00 GMT", "description": "These aerogeophysical data were collected during the seventh ICECAP field season in 2015-16, and interpreted as part of the SPICECAP project. They consist of 7 survey flights using a BT-67 Basler and the ICECAP aergeophysical suite. The flights were based out of Australia\u0027s Casey Station and France/Italy\u0027s Concordia Station in East Antarctica, as part of a focused survey of the \u0027Little Dome C\u0027, a region with a suspected 1.5 Ma ice core record. The Level 2 data here consist of ice thickness, bed elevation and surface and bed reflectivity data, bed specularity content data, unleveled magnetic anomaly data, unleveled gravity anomaly data, and laser altimetry. Formats are self documented text files parallel those used by ICECAP (found in the Operation IceBridge archive at the National Snow and Ice Data Center), GIMBLE (found at USAP-DC), EAGLE-ICECAPII (found at the Australian Antarctic Data Center) and David Glacier (found on Zenodo.org), with summary maps of included data in PNG format.", "east": 140.0, "geometry": ["POINT(125 -71.5)"], "keywords": "Aerogeophysics; Antarctica; Bed Elevation; Bed Reflectivity; Epica Dome C; Ice Thickness", "locations": "Epica Dome C; Antarctica", "north": -68.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Young, Duncan A.; Roberts, Jason; Blankenship, Donald D.; van Ommen, Tas; Richter, Thomas; Greenbaum, Jamin; Cavitte, Marie G. P; Beem, Lucas H.; Quartini, Enrica; Tozer, Carly; Ng, Gregory; Habbal, Feras; Kempf, Scott D.; Ritz, Catherine", "project_titles": "Collaborative Research: Southern Plateau Ice-sheet Characterization and Evolution of the Central Antarctic Plate (SPICECAP)", "projects": [{"proj_uid": "p0010115", "repository": "USAP-DC", "title": "Collaborative Research: Southern Plateau Ice-sheet Characterization and Evolution of the Central Antarctic Plate (SPICECAP)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Dome C Ice Core", "south": -75.0, "title": "ICECAP: High resolution survey of the Little Dome C region in support of the IPICS Old Ice goal", "uid": "601355", "west": 110.0}, {"awards": "1235094 Thurnherr, Andreas", "bounds_geometry": ["POINT(-14.5787 -21.1215)"], "date_created": "Thu, 02 Jul 2020 00:00:00 GMT", "description": "This data set was acquired with a Nortek Aquadopp Current Meter during R/V Nathaniel B. Palmer expedition NBP1508 conducted in 2015 (Chief Scientist: Dr. Louis St.Laurent, Investigator: Dr. Andreas Thurnherr). These data files are of NetCDF format and include Current Measurement, Pressure and Temperature data that were processed after acquisition. Data were acquired as part of the project(s): Collaborative Research: Flow, Turbulence and Mixing in Mid-Ocean Ridge Fracture Zone Canyons. Funding was provided by NSF award(s): OCE12-35094.", "east": -14.5787, "geometry": ["POINT(-14.5787 -21.1215)"], "keywords": "CTD; CTD Data; Current Measurements; Current Meter; Mid-Ocean Ridge; Mooring; NBP1508; Oceans; Physical Oceanography; Pressure; R/v Nathaniel B. Palmer; Salinity; South Atlantic Ocean; Temperature", "locations": "South Atlantic Ocean", "north": -21.1215, "nsf_funding_programs": null, "persons": "Thurnherr, Andreas", "project_titles": "Collaborative Research: Flow, Turbulence and Mixing in Mid-Ocean Ridge Fracture Zone Canyons", "projects": [{"proj_uid": "p0010114", "repository": "USAP-DC", "title": "Collaborative Research: Flow, Turbulence and Mixing in Mid-Ocean Ridge Fracture Zone Canyons"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -21.1215, "title": "Processed Current Measurement, Pressure and Temperature Data from the Southern Mid-Atlantic Ridge Spreading acquired during R/V Nathaniel B. Palmer expedition NBP1508 (2015)", "uid": "601353", "west": -14.5787}, {"awards": "1235094 Thurnherr, Andreas", "bounds_geometry": ["POLYGON((-14.7 -20.8,-14.59 -20.8,-14.48 -20.8,-14.37 -20.8,-14.26 -20.8,-14.15 -20.8,-14.04 -20.8,-13.93 -20.8,-13.82 -20.8,-13.71 -20.8,-13.6 -20.8,-13.6 -20.856,-13.6 -20.912,-13.6 -20.968,-13.6 -21.024,-13.6 -21.08,-13.6 -21.136,-13.6 -21.192,-13.6 -21.248,-13.6 -21.304,-13.6 -21.36,-13.71 -21.36,-13.82 -21.36,-13.93 -21.36,-14.04 -21.36,-14.15 -21.36,-14.26 -21.36,-14.37 -21.36,-14.48 -21.36,-14.59 -21.36,-14.7 -21.36,-14.7 -21.304,-14.7 -21.248,-14.7 -21.192,-14.7 -21.136,-14.7 -21.08,-14.7 -21.024,-14.7 -20.968,-14.7 -20.912,-14.7 -20.856,-14.7 -20.8))"], "date_created": "Thu, 02 Jul 2020 00:00:00 GMT", "description": "This data set was acquired with a Lowered Acoustic Doppler Current Profiler during R/V Nathaniel B. Palmer expedition NBP1508 conducted in 2015 (Chief Scientist: Dr. Louis St.Laurent, Investigator: Dr. Andreas Thurnherr). These data files are of NetCDF format and include Current Measurement data that were processed after acquisition. Data were acquired as part of the project(s): Collaborative Research: Flow, Turbulence and Mixing in Mid-Ocean Ridge Fracture Zone Canyons. Funding was provided by NSF award(s): OCE12-35094.", "east": -13.6, "geometry": ["POINT(-14.15 -21.08)"], "keywords": "Current Measurements; LADCP; Mid-Ocean Ridge; NBP1508; Oceans; Physical Oceanography; R/v Nathaniel B. Palmer; South Atlantic Ocean", "locations": "South Atlantic Ocean", "north": -20.8, "nsf_funding_programs": null, "persons": "Thurnherr, Andreas", "project_titles": "Collaborative Research: Flow, Turbulence and Mixing in Mid-Ocean Ridge Fracture Zone Canyons", "projects": [{"proj_uid": "p0010114", "repository": "USAP-DC", "title": "Collaborative Research: Flow, Turbulence and Mixing in Mid-Ocean Ridge Fracture Zone Canyons"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -21.36, "title": "Processed Current Measurement Data from the Southern Mid-Atlantic Ridge Spreading acquired during R/V Nathaniel B. Palmer expedition NBP1508", "uid": "601354", "west": -14.7}, {"awards": "1235094 Thurnherr, Andreas", "bounds_geometry": ["POLYGON((-14.5787 -20.9223,-14.49208 -20.9223,-14.40546 -20.9223,-14.31884 -20.9223,-14.23222 -20.9223,-14.1456 -20.9223,-14.05898 -20.9223,-13.97236 -20.9223,-13.88574 -20.9223,-13.79912 -20.9223,-13.7125 -20.9223,-13.7125 -20.94222,-13.7125 -20.96214,-13.7125 -20.98206,-13.7125 -21.00198,-13.7125 -21.0219,-13.7125 -21.04182,-13.7125 -21.06174,-13.7125 -21.08166,-13.7125 -21.10158,-13.7125 -21.1215,-13.79912 -21.1215,-13.88574 -21.1215,-13.97236 -21.1215,-14.05898 -21.1215,-14.1456 -21.1215,-14.23222 -21.1215,-14.31884 -21.1215,-14.40546 -21.1215,-14.49208 -21.1215,-14.5787 -21.1215,-14.5787 -21.10158,-14.5787 -21.08166,-14.5787 -21.06174,-14.5787 -21.04182,-14.5787 -21.0219,-14.5787 -21.00198,-14.5787 -20.98206,-14.5787 -20.96214,-14.5787 -20.94222,-14.5787 -20.9223))"], "date_created": "Thu, 02 Jul 2020 00:00:00 GMT", "description": "This data set was acquired with a McLane Research Laboratories and Inc. MMP Mooring Profiler during R/V Nathaniel B. Palmer expedition NBP1508 conducted in 2015 (Chief Scientist: Dr. Louis St.Laurent, Investigator: Dr. Andreas Thurnherr). These data files are of NetCDF format and include Current Measurement, Pressure, Salinity and Temperature data that were processed after acquisition. Data were acquired as part of the project(s): Collaborative Research: Flow, Turbulence and Mixing in Mid-Ocean Ridge Fracture Zone Canyons. Funding was provided by NSF award(s): OCE12-35094.", "east": -13.7125, "geometry": ["POINT(-14.1456 -21.0219)"], "keywords": "CTD; Mid-Ocean Ridge; Mooring; NBP1508; Oceans; Physical Oceanography; Pressure; R/v Nathaniel B. Palmer; Salinity; South Atlantic Ocean; Temperature", "locations": "South Atlantic Ocean", "north": -20.9223, "nsf_funding_programs": null, "persons": "Thurnherr, Andreas", "project_titles": "Collaborative Research: Flow, Turbulence and Mixing in Mid-Ocean Ridge Fracture Zone Canyons", "projects": [{"proj_uid": "p0010114", "repository": "USAP-DC", "title": "Collaborative Research: Flow, Turbulence and Mixing in Mid-Ocean Ridge Fracture Zone Canyons"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -21.1215, "title": "Processed Current Measurement, Pressure, Salinity and Temperature Data from the Southern Mid-Atlantic Ridge Spreading acquired during R/V Nathaniel B. Palmer expedition NBP1508", "uid": "601352", "west": -14.5787}, {"awards": "1341658 Mukhopadhyay, Sujoy", "bounds_geometry": ["POLYGON((-116.46 -84.78,-116.452 -84.78,-116.444 -84.78,-116.436 -84.78,-116.428 -84.78,-116.42 -84.78,-116.412 -84.78,-116.404 -84.78,-116.396 -84.78,-116.388 -84.78,-116.38 -84.78,-116.38 -84.781,-116.38 -84.782,-116.38 -84.783,-116.38 -84.784,-116.38 -84.785,-116.38 -84.786,-116.38 -84.787,-116.38 -84.788,-116.38 -84.789,-116.38 -84.79,-116.388 -84.79,-116.396 -84.79,-116.404 -84.79,-116.412 -84.79,-116.42 -84.79,-116.428 -84.79,-116.436 -84.79,-116.444 -84.79,-116.452 -84.79,-116.46 -84.79,-116.46 -84.789,-116.46 -84.788,-116.46 -84.787,-116.46 -84.786,-116.46 -84.785,-116.46 -84.784,-116.46 -84.783,-116.46 -84.782,-116.46 -84.781,-116.46 -84.78))"], "date_created": "Sun, 28 Jun 2020 00:00:00 GMT", "description": "The data set consists of cosmogenic berrylium-10 and aluminum-26, along with neon-21, in a set of 4 rock-cores obtained from the Ohio Range, West Antarctica. The rock cores were obtained using the WInkie drill. The depth to the cores varies from 12 meters to 28 meters. The recovered rock cores analyzed for the cosmogenic isotopes varies from 22 cm long to 50 cm long. The data include the following formation: sample details, cosmogenic berrylium-10, aluminum-26 and upper bounds for cosmogenic 21 (since samples have nucleogenic 21) and the step heating data for neon. The data are in Mircrosoft excel format.", "east": -116.38, "geometry": ["POINT(-116.42 -84.785)"], "keywords": "Aluminum-26; Antarctica; Beryllium-10; Cosmogenic Dating; Cosmogenic Radionuclides; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Sheet Fluctuations; Ohio Range; Rocks", "locations": "Antarctica; Ohio Range", "north": -84.78, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Mukhopadhyay, Sujoy", "project_titles": "Constraining Plio-Pleistocene West Antarctic Ice Sheet Behavior from the Ohio Range and Scott Glacier", "projects": [{"proj_uid": "p0010113", "repository": "USAP-DC", "title": "Constraining Plio-Pleistocene West Antarctic Ice Sheet Behavior from the Ohio Range and Scott Glacier"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -84.79, "title": "Ohio Range Subglacial rock core cosmogenic nuclide data", "uid": "601351", "west": -116.46}, {"awards": "0732467 Domack, Eugene; 0732651 Gordon, Arnold", "bounds_geometry": ["POLYGON((-68 -60,-66.7 -60,-65.4 -60,-64.1 -60,-62.8 -60,-61.5 -60,-60.2 -60,-58.9 -60,-57.6 -60,-56.3 -60,-55 -60,-55 -60.6,-55 -61.2,-55 -61.8,-55 -62.4,-55 -63,-55 -63.6,-55 -64.2,-55 -64.8,-55 -65.4,-55 -66,-56.3 -66,-57.6 -66,-58.9 -66,-60.2 -66,-61.5 -66,-62.8 -66,-64.1 -66,-65.4 -66,-66.7 -66,-68 -66,-68 -65.4,-68 -64.8,-68 -64.2,-68 -63.6,-68 -63,-68 -62.4,-68 -61.8,-68 -61.2,-68 -60.6,-68 -60))"], "date_created": "Thu, 25 Jun 2020 00:00:00 GMT", "description": "This data set was acquired with a ship-based LDEO LADCP Sonar during Nathaniel B. Palmer expedition NBP1001 conducted in 2010 (Chief Scientist: Dr. Eugene Domack; Investigator(s): Dr. Bruce Huber and Dr. Arnold Gordon). These data files are of Matlab Binary format and include Current Measurement data and were processed after data collection. Data were acquired as part of the project(s): Collaborative Research in IPY: Abrupt Environmental Change in the LARsen Ice Shelf System, Antarctica (LARISSA), and funding was provided by NSF grant(s): ANT07-32467.", "east": -55.0, "geometry": ["POINT(-61.5 -63)"], "keywords": "Antarctica; Antarctic Peninsula; Current Measurements; LADCP; Larsen Ice Shelf; NBP1001; Oceans; Physical Oceanography; R/v Nathaniel B. Palmer", "locations": "Antarctica; Larsen Ice Shelf; Antarctic Peninsula", "north": -60.0, "nsf_funding_programs": "Antarctic Integrated System Science; Antarctic Integrated System Science", "persons": "Huber, Bruce; Gordon, Arnold", "project_titles": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans; Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach - Marine and Quaternary Geosciences", "projects": [{"proj_uid": "p0000841", "repository": "USAP-DC", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach - Marine and Quaternary Geosciences"}, {"proj_uid": "p0000101", "repository": "USAP-DC", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "LARISSA", "south": -66.0, "title": "Processed ship-based LADCP Sonar Data from the Larsen Ice Shelf in Antarctica acquired during the Nathaniel B. Palmer expedition NBP1001", "uid": "601346", "west": -68.0}, {"awards": "0087401 Smith, Walker", "bounds_geometry": ["POLYGON((-179.999 -77,-179.1991 -77,-178.3992 -77,-177.5993 -77,-176.7994 -77,-175.9995 -77,-175.1996 -77,-174.3997 -77,-173.5998 -77,-172.7999 -77,-172 -77,-172 -77.07,-172 -77.14,-172 -77.21,-172 -77.28,-172 -77.35,-172 -77.42,-172 -77.49,-172 -77.56,-172 -77.63,-172 -77.7,-172.7999 -77.7,-173.5998 -77.7,-174.3997 -77.7,-175.1996 -77.7,-175.9995 -77.7,-176.7994 -77.7,-177.5993 -77.7,-178.3992 -77.7,-179.1991 -77.7,-179.999 -77.7,-179.999 -77.63,-179.999 -77.56,-179.999 -77.49,-179.999 -77.42,-179.999 -77.35,-179.999 -77.28,-179.999 -77.21,-179.999 -77.14,-179.999 -77.07,-179.999 -77))"], "date_created": "Thu, 25 Jun 2020 00:00:00 GMT", "description": "This data set was acquired with a InterOcean S4 Current Meter deployed on moorings in the Ross Sea from December 2005 through February 2006. Moorings were were retrieved during Nathaniel B. Palmer expedition NBP0601A conducted in 2006 (Chief Scientist: Dr. Walker Smith; Investigator(s): Dr. Vernon Asper). These data files are of Text File (ASCII) format and include Current Measurement data that have not been processed. Data were acquired as part of the project(s): Interannual variability in the Antarctic - Ross Sea (IVARS): Nutrients", "east": -172.0, "geometry": ["POINT(-175.9995 -77.35)"], "keywords": "Antarctica; Current Meter; Mooring; NBP0601A; Oceans; Physical Oceanography; Ross Sea; Southern Ocean", "locations": "Antarctica; Antarctica; Southern Ocean; Ross Sea", "north": -77.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Asper, Vernon; Smith, Walker", "project_titles": "Interannual Variability in the Antarctic-Ross Sea (IVARS): Nutrients and Seasonal Production", "projects": [{"proj_uid": "p0000803", "repository": "USAP-DC", "title": "Interannual Variability in the Antarctic-Ross Sea (IVARS): Nutrients and Seasonal Production"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.7, "title": "Current Meter Data from the Ross Sea acquired with a Mooring deployed in December 2005 and recovered during the Nathaniel B. Palmer expedition NBP0601A (2006)", "uid": "601339", "west": -179.999}, {"awards": "0338097 DiTullio, Giacomo; 0338157 Smith, Walker", "bounds_geometry": ["POLYGON((-180 -76,-179.7 -76,-179.4 -76,-179.1 -76,-178.8 -76,-178.5 -76,-178.2 -76,-177.9 -76,-177.6 -76,-177.3 -76,-177 -76,-177 -76.2,-177 -76.4,-177 -76.6,-177 -76.8,-177 -77,-177 -77.2,-177 -77.4,-177 -77.6,-177 -77.8,-177 -78,-177.3 -78,-177.6 -78,-177.9 -78,-178.2 -78,-178.5 -78,-178.8 -78,-179.1 -78,-179.4 -78,-179.7 -78,180 -78,178.5 -78,177 -78,175.5 -78,174 -78,172.5 -78,171 -78,169.5 -78,168 -78,166.5 -78,165 -78,165 -77.8,165 -77.6,165 -77.4,165 -77.2,165 -77,165 -76.8,165 -76.6,165 -76.4,165 -76.2,165 -76,166.5 -76,168 -76,169.5 -76,171 -76,172.5 -76,174 -76,175.5 -76,177 -76,178.5 -76,-180 -76))"], "date_created": "Thu, 25 Jun 2020 00:00:00 GMT", "description": "This data set was acquired with a Niskin Bottle Fluid Sampler during Nathaniel B. Palmer expedition NBP0601 conducted in 2005 (Chief Scientist: Dr. Giacomo DiTullio). The data files are in XLS format and include Fluid Chemistry data that have been processed. The data was acquired as part of the project called Interaction of iron, light and CO2 on phytoplankton community dynamics in the Ross Sea. Funding was provided by NSF grants: ANT03-38097, ANT03-38157, ANT03-38164, and ANT03-38350.\r\n", "east": -177.0, "geometry": ["POINT(174 -77)"], "keywords": "Antarctica; Chemistry:fluid; Chemistry:Fluid; Fluid Chemistry Data; Geochemistry; NBP0601; Niskin Bottle; Oceans; Ross Sea; R/v Nathaniel B. 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Palmer expedition NBP0601", "uid": "601340", "west": 165.0}, {"awards": "0087401 Smith, Walker", "bounds_geometry": ["POLYGON((-180 -76,-179.6 -76,-179.2 -76,-178.8 -76,-178.4 -76,-178 -76,-177.6 -76,-177.2 -76,-176.8 -76,-176.4 -76,-176 -76,-176 -76.2,-176 -76.4,-176 -76.6,-176 -76.8,-176 -77,-176 -77.2,-176 -77.4,-176 -77.6,-176 -77.8,-176 -78,-176.4 -78,-176.8 -78,-177.2 -78,-177.6 -78,-178 -78,-178.4 -78,-178.8 -78,-179.2 -78,-179.6 -78,180 -78,178.5 -78,177 -78,175.5 -78,174 -78,172.5 -78,171 -78,169.5 -78,168 -78,166.5 -78,165 -78,165 -77.8,165 -77.6,165 -77.4,165 -77.2,165 -77,165 -76.8,165 -76.6,165 -76.4,165 -76.2,165 -76,166.5 -76,168 -76,169.5 -76,171 -76,172.5 -76,174 -76,175.5 -76,177 -76,178.5 -76,-180 -76))"], "date_created": "Thu, 25 Jun 2020 00:00:00 GMT", "description": "This data set was acquired with a Niskin Bottle Fluid Sampler during Nathaniel B. Palmer expedition NBP0601A conducted in 2006 (Chief Scientist: Dr. Walker Smith). The data files are in XLS format and include Fluid Chemistry data that has not been processed. The data was acquired as part of the project called Interannual Variability in the Antarctic - Ross Sea (IVARS): Nutrients.", "east": -176.0, "geometry": ["POINT(174.5 -77)"], "keywords": "Antarctica; Chemistry:fluid; Chemistry:Fluid; Fluid Chemistry Data; Mooring; NBP0601A; Oceans; Ross Sea; R/v Nathaniel B. Palmer; Seawater Measurements; Southern Ocean", "locations": "Antarctica; Ross Sea; Southern Ocean; Antarctica", "north": -76.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Asper, Vernon; Smith, Walker", "project_titles": "Interannual Variability in the Antarctic-Ross Sea (IVARS): Nutrients and Seasonal Production", "projects": [{"proj_uid": "p0000803", "repository": "USAP-DC", "title": "Interannual Variability in the Antarctic-Ross Sea (IVARS): Nutrients and Seasonal Production"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Processed Fluid Chemistry Data from the Ross Sea acquired during the Nathaniel B. Palmer expedition NBP0601A", "uid": "601341", "west": 165.0}, {"awards": "0337159 McPhee, Miles", "bounds_geometry": ["POLYGON((-2 -62,-1 -62,0 -62,1 -62,2 -62,3 -62,4 -62,5 -62,6 -62,7 -62,8 -62,8 -62.42,8 -62.84,8 -63.26,8 -63.68,8 -64.1,8 -64.52,8 -64.94,8 -65.36,8 -65.78,8 -66.2,7 -66.2,6 -66.2,5 -66.2,4 -66.2,3 -66.2,2 -66.2,1 -66.2,0 -66.2,-1 -66.2,-2 -66.2,-2 -65.78,-2 -65.36,-2 -64.94,-2 -64.52,-2 -64.1,-2 -63.68,-2 -63.26,-2 -62.84,-2 -62.42,-2 -62))"], "date_created": "Thu, 25 Jun 2020 00:00:00 GMT", "description": "This data set was acquired with a ADCP Sonar and CTD during Nathaniel B. Palmer expedition NBP0506 conducted in 2005 (Chief Scientist: Dr. Miles McPhee). These data files are of MATLAB format and include Turbulence, Salinity, and Temperature data that have not been processed. Data were acquired as part of the project(s): Maud rise Non-linear Equation of State Study, and funding was provided by NSF grant(s): ANT03-37159.", "east": 8.0, "geometry": ["POINT(3 -64.1)"], "keywords": "ADCP Acoustic Doppler Current Profiler; Antarctica; CTD; Maud Rise; NBP0506; Physical Oceanography; R/v Nathaniel B. 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Palmer expedition NBP0506", "uid": "601342", "west": -2.0}, {"awards": "0538148 Huber, Bruce; 0839039 Kustka, Adam", "bounds_geometry": ["POLYGON((172 -71,172.1 -71,172.2 -71,172.3 -71,172.4 -71,172.5 -71,172.6 -71,172.7 -71,172.8 -71,172.9 -71,173 -71,173 -71.1,173 -71.2,173 -71.3,173 -71.4,173 -71.5,173 -71.6,173 -71.7,173 -71.8,173 -71.9,173 -72,172.9 -72,172.8 -72,172.7 -72,172.6 -72,172.5 -72,172.4 -72,172.3 -72,172.2 -72,172.1 -72,172 -72,172 -71.9,172 -71.8,172 -71.7,172 -71.6,172 -71.5,172 -71.4,172 -71.3,172 -71.2,172 -71.1,172 -71))"], "date_created": "Thu, 25 Jun 2020 00:00:00 GMT", "description": "This data set was acquired with a CurrentMeter during Nathaniel B. Palmer expedition NBP1101 conducted in 2011 (Chief Scientist: Dr. Josh Kohut; Investigator(s): Dr. Bruce Huber and Dr. Arnold Gordon). These data files are of Matlab Binary format and include Temperature, Current Measurement, and Salinity data and were processed after data collection. Data were acquired as part of the project(s): Ross Sea Expedition, and funding was provided by NSF grant(s): ANT08-39039.", "east": 173.0, "geometry": ["POINT(172.5 -71.5)"], "keywords": "Antarctica; Mooring; NBP1101; Ross Sea; Salinity; Southern Ocean; Temperature", "locations": "Southern Ocean; Ross Sea; Antarctica", "north": -71.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences; Antarctic Ocean and Atmospheric Sciences", "persons": "Huber, Bruce; Gordon, Arnold", "project_titles": "Cape Adare Long-term Mooring (CALM); Collaborate Research:Modified Circumpolar Deep Water Intrusions as an Iron Source to the Summer Ross Sea Ecosystem", "projects": [{"proj_uid": "p0000843", "repository": "USAP-DC", "title": "Collaborate Research:Modified Circumpolar Deep Water Intrusions as an Iron Source to the Summer Ross Sea Ecosystem"}, {"proj_uid": "p0000838", "repository": "USAP-DC", "title": "Cape Adare Long-term Mooring (CALM)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -72.0, "title": "Processed CurrentMeter Data from the Adare Basin near Antarctica acquired during the Nathaniel B. Palmer expedition NBP1101 ", "uid": "601343", "west": 172.0}, {"awards": "0542456 Caron, David; 0538148 Huber, Bruce", "bounds_geometry": ["POLYGON((169 -70.5,169.4 -70.5,169.8 -70.5,170.2 -70.5,170.6 -70.5,171 -70.5,171.4 -70.5,171.8 -70.5,172.2 -70.5,172.6 -70.5,173 -70.5,173 -70.65,173 -70.8,173 -70.95,173 -71.1,173 -71.25,173 -71.4,173 -71.55,173 -71.7,173 -71.85,173 -72,172.6 -72,172.2 -72,171.8 -72,171.4 -72,171 -72,170.6 -72,170.2 -72,169.8 -72,169.4 -72,169 -72,169 -71.85,169 -71.7,169 -71.55,169 -71.4,169 -71.25,169 -71.1,169 -70.95,169 -70.8,169 -70.65,169 -70.5))"], "date_created": "Thu, 25 Jun 2020 00:00:00 GMT", "description": "This data set was acquired with a CurrentMeter during Nathaniel B. Palmer expedition NBP0801 conducted in 2008 (Chief Scientist: Dr. David Caron; Investigator(s): Dr. Bruce Huber and Dr. Arnold Gordon). These data files are of Matlab Binary format and include Current Measurement, Salinity, and Temperature data and were processed after data collection. Data were acquired as part of the project(s): Cape Adare Long-term Mooring (CALM) and Collaborative Research:Do crustacean zooplankton play a pivotal role in structuring heterotrophic plankton communities., and funding was provided by NSF grant(s): ANT05-38148 and ANT05-42456.", "east": 173.0, "geometry": ["POINT(171 -71.25)"], "keywords": "Antarctica; Cape Adare; Mooring; NBP0801; Physical Oceanography; Ross Sea; R/v Nathaniel B. Palmer; Salinity; Southern Ocean; Temperature", "locations": "Southern Ocean; Cape Adare; Ross Sea; Ross Sea; Cape Adare; Antarctica; Antarctica", "north": -70.5, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences; Antarctic Ocean and Atmospheric Sciences", "persons": "Huber, Bruce; Gordon, Arnold", "project_titles": "Cape Adare Long-term Mooring (CALM); Collaborative Research: Do Crustacean Zooplankton Play a Pivotal Role in Structuring Heterotrophic Plankton Communities in the Ross Sea?", "projects": [{"proj_uid": "p0000520", "repository": "USAP-DC", "title": "Collaborative Research: Do Crustacean Zooplankton Play a Pivotal Role in Structuring Heterotrophic Plankton Communities in the Ross Sea?"}, {"proj_uid": "p0000838", "repository": "USAP-DC", "title": "Cape Adare Long-term Mooring (CALM)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -72.0, "title": "Processed CurrentMeter Data from the Ross Sea near Antarctica acquired during the Nathaniel B. Palmer expedition NBP0801", "uid": "601344", "west": 169.0}, {"awards": "0732467 Domack, Eugene; 0732651 Gordon, Arnold", "bounds_geometry": ["POLYGON((-68 -60,-66.7 -60,-65.4 -60,-64.1 -60,-62.8 -60,-61.5 -60,-60.2 -60,-58.9 -60,-57.6 -60,-56.3 -60,-55 -60,-55 -60.6,-55 -61.2,-55 -61.8,-55 -62.4,-55 -63,-55 -63.6,-55 -64.2,-55 -64.8,-55 -65.4,-55 -66,-56.3 -66,-57.6 -66,-58.9 -66,-60.2 -66,-61.5 -66,-62.8 -66,-64.1 -66,-65.4 -66,-66.7 -66,-68 -66,-68 -65.4,-68 -64.8,-68 -64.2,-68 -63.6,-68 -63,-68 -62.4,-68 -61.8,-68 -61.2,-68 -60.6,-68 -60))"], "date_created": "Thu, 25 Jun 2020 00:00:00 GMT", "description": "This data set was acquired with a Sea-Bird SBE 9Plus CTD during Nathaniel B. Palmer expedition NBP1001 conducted in 2010 (Chief Scientist: Dr. Eugene Domack; Investigator(s): Dr. Bruce Huber and Dr. Arnold Gordon). These data files are of Matlab Binary format and include Temperature, Current Measurement, and Salinity data and were processed after data collection. Data were acquired as part of the project(s): Collaborative Research in IPY: Abrupt Environmental Change in the LARsen Ice Shelf System, Antarctica (LARISSA), and funding was provided by NSF grant(s): ANT07-32467.", "east": -55.0, "geometry": ["POINT(-61.5 -63)"], "keywords": "Antarctica; Antarctic Peninsula; CTD; CTD Data; LARISSA; Larsen Ice Shelf; NBP1001; Oceans; Physical Oceanography; R/v Nathaniel B. Palmer; Salinity; Temperature", "locations": "Antarctic Peninsula; Antarctica; Larsen Ice Shelf", "north": -60.0, "nsf_funding_programs": "Antarctic Integrated System Science; Antarctic Integrated System Science", "persons": "Huber, Bruce; Gordon, Arnold", "project_titles": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans; Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach - Marine and Quaternary Geosciences", "projects": [{"proj_uid": "p0000101", "repository": "USAP-DC", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans"}, {"proj_uid": "p0000841", "repository": "USAP-DC", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach - Marine and Quaternary Geosciences"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "LARISSA", "south": -66.0, "title": "Processed CTD Data from the Larsen Ice Shelf in Antarctica acquired during the Nathaniel B. Palmer expedition NBP1001", "uid": "601345", "west": -68.0}, {"awards": "1141890 Huber, Bruce; 0732651 Gordon, Arnold", "bounds_geometry": ["POLYGON((-62 -61,-61.3 -61,-60.6 -61,-59.9 -61,-59.2 -61,-58.5 -61,-57.8 -61,-57.1 -61,-56.4 -61,-55.7 -61,-55 -61,-55 -61.44,-55 -61.88,-55 -62.32,-55 -62.76,-55 -63.2,-55 -63.64,-55 -64.08,-55 -64.52,-55 -64.96,-55 -65.4,-55.7 -65.4,-56.4 -65.4,-57.1 -65.4,-57.8 -65.4,-58.5 -65.4,-59.2 -65.4,-59.9 -65.4,-60.6 -65.4,-61.3 -65.4,-62 -65.4,-62 -64.96,-62 -64.52,-62 -64.08,-62 -63.64,-62 -63.2,-62 -62.76,-62 -62.32,-62 -61.88,-62 -61.44,-62 -61))"], "date_created": "Thu, 25 Jun 2020 00:00:00 GMT", "description": "This data set was acquired with a ship-based LDEO LADCP Sonar during Nathaniel B. Palmer expedition NBP1203 conducted in 2012 (Chief Scientist: Dr. Maria Vernet; Investigator(s): Dr. Bruce Huber and Dr. Arnold Gordon). These data files are of Matlab Binary format and include Current Measurement data and were processed after data collection. Funding was provided by NSF grant(s): ANT11-41890.", "east": -55.0, "geometry": ["POINT(-58.5 -63.2)"], "keywords": "Antarctica; Antarctic Peninsula; Current Measurements; LADCP; LARISSA; Larsen Ice Shelf; NBP1203; Oceans; Physical Oceanography; R/v Nathaniel B. Palmer", "locations": "Antarctic Peninsula; Antarctica; Larsen Ice Shelf", "north": -61.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences; Antarctic Integrated System Science", "persons": "Huber, Bruce; Gordon, Arnold", "project_titles": "Cape Adare Long Term Moorings (CALM): Analysis Phase; Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans", "projects": [{"proj_uid": "p0000101", "repository": "USAP-DC", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans"}, {"proj_uid": "p0000495", "repository": "USAP-DC", "title": "Cape Adare Long Term Moorings (CALM): Analysis Phase"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.4, "title": "Processed ship-based LADCP Sonar Data from the Larsen Ice Shelf near Antarctica acquired during the Nathaniel B. Palmer expedition NBP1203", "uid": "601347", "west": -62.0}, {"awards": "1141890 Huber, Bruce; 0732651 Gordon, Arnold", "bounds_geometry": ["POLYGON((-63 -60,-62.2 -60,-61.4 -60,-60.6 -60,-59.8 -60,-59 -60,-58.2 -60,-57.4 -60,-56.6 -60,-55.8 -60,-55 -60,-55 -60.5,-55 -61,-55 -61.5,-55 -62,-55 -62.5,-55 -63,-55 -63.5,-55 -64,-55 -64.5,-55 -65,-55.8 -65,-56.6 -65,-57.4 -65,-58.2 -65,-59 -65,-59.8 -65,-60.6 -65,-61.4 -65,-62.2 -65,-63 -65,-63 -64.5,-63 -64,-63 -63.5,-63 -63,-63 -62.5,-63 -62,-63 -61.5,-63 -61,-63 -60.5,-63 -60))"], "date_created": "Thu, 25 Jun 2020 00:00:00 GMT", "description": "This data set was acquired with a Sea-Bird SBE 9Plus CTD during Nathaniel B. Palmer expedition NBP1203 conducted in 2012 (Chief Scientist: Dr. Maria Vernet; Investigator(s): Dr. Bruce Huber and Dr. Arnold Gordon). These data files are of Matlab Binary format and include Current Measurement, Salinity, and Temperature data and were processed after data collection. Funding was provided by NSF grant(s): ANT11-41890.", "east": -55.0, "geometry": ["POINT(-59 -62.5)"], "keywords": "Antarctica; Antarctic Peninsula; CTD; CTD Data; LARISSA; Larsen Ice Shelf; NBP1203; Oceans; Physical Oceanography; R/v Nathaniel B. Palmer; Salinity; Temperature", "locations": "Antarctica; Antarctic Peninsula; Larsen Ice Shelf", "north": -60.0, "nsf_funding_programs": "Antarctic Integrated System Science; Antarctic Ocean and Atmospheric Sciences", "persons": "Huber, Bruce; Gordon, Arnold", "project_titles": "Cape Adare Long Term Moorings (CALM): Analysis Phase; Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans", "projects": [{"proj_uid": "p0000495", "repository": "USAP-DC", "title": "Cape Adare Long Term Moorings (CALM): Analysis Phase"}, {"proj_uid": "p0000101", "repository": "USAP-DC", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.0, "title": "Processed CTD Data from the Larsen Ice Shelf near Antarctica acquired during the Nathaniel B. Palmer expedition NBP1203", "uid": "601348", "west": -63.0}, {"awards": "0632282 Jacobs, Stanley", "bounds_geometry": ["POLYGON((-130 -66,-127 -66,-124 -66,-121 -66,-118 -66,-115 -66,-112 -66,-109 -66,-106 -66,-103 -66,-100 -66,-100 -66.95,-100 -67.9,-100 -68.85,-100 -69.8,-100 -70.75,-100 -71.7,-100 -72.65,-100 -73.6,-100 -74.55,-100 -75.5,-103 -75.5,-106 -75.5,-109 -75.5,-112 -75.5,-115 -75.5,-118 -75.5,-121 -75.5,-124 -75.5,-127 -75.5,-130 -75.5,-130 -74.55,-130 -73.6,-130 -72.65,-130 -71.7,-130 -70.75,-130 -69.8,-130 -68.85,-130 -67.9,-130 -66.95,-130 -66))"], "date_created": "Thu, 25 Jun 2020 00:00:00 GMT", "description": "This data set was acquired with a LDEO LADCP Sonar during Nathaniel B. Palmer expedition NBP0901 conducted in 2009 (Chief Scientist: Dr. Stan Jacobs; Investigator(s): Dr. Andreas Thurnherr). These data files are of ASCII format and include Current Measurement data and were processed after data collection. Data were acquired as part of the project(s): Collaborative International Research: Amundsen Sea Influence on West Antarctic Ice Sheet Stability and Sea Level Rise, Shedding dynamic light on iron limitation: The interplay of iron limitation and dynamic irradiance conditions in governing the phytoplankton distribution in the Ross Sea, and Collaborative Research: Sampling the ocean - sea ice interaction in the Pacific center of the Antarctic Dipole, and funding was provided by NSF grant(s): OPP06-32282.", "east": -100.0, "geometry": ["POINT(-115 -70.75)"], "keywords": "Amundsen Sea; Antarctica; Current Measurements; LADCP; NBP0901; Oceans; Physical Oceanography; Pine Island Bay; R/v Nathaniel B. 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Palmer expedition NBP0901", "uid": "601349", "west": -130.0}, {"awards": "0632282 Jacobs, Stanley", "bounds_geometry": ["POLYGON((-130 -64,-126.5 -64,-123 -64,-119.5 -64,-116 -64,-112.5 -64,-109 -64,-105.5 -64,-102 -64,-98.5 -64,-95 -64,-95 -65.15,-95 -66.3,-95 -67.45,-95 -68.6,-95 -69.75,-95 -70.9,-95 -72.05,-95 -73.2,-95 -74.35,-95 -75.5,-98.5 -75.5,-102 -75.5,-105.5 -75.5,-109 -75.5,-112.5 -75.5,-116 -75.5,-119.5 -75.5,-123 -75.5,-126.5 -75.5,-130 -75.5,-130 -74.35,-130 -73.2,-130 -72.05,-130 -70.9,-130 -69.75,-130 -68.6,-130 -67.45,-130 -66.3,-130 -65.15,-130 -64))"], "date_created": "Thu, 25 Jun 2020 00:00:00 GMT", "description": "This data set was derived from data acquired during Nathaniel B. Palmer expedition NBP0901 conducted in 2009 (Chief Scientist: Dr. Stan Jacobs; Investigator(s): Dr. Stan Jacobs and Dr. Bruce Huber). These data files are of Matlab Binary format and include Current Measurement, Salinity, and Temperature data and were processed after data collection. Data were acquired as part of the project(s): Collaborative International Research: Amundsen Sea Influence on West Antarctic Ice Sheet Stability and Sea Level Rise, Shedding dynamic light on iron limitation: The interplay of iron limitation and dynamic irradiance conditions in governing the phytoplankton distribution in the Ross Sea, and Collaborative Research: Sampling the ocean - sea ice interaction in the Pacific center of the Antarctic Dipole, and funding was provided by NSF grant(s): OPP06-32282.", "east": -95.0, "geometry": ["POINT(-112.5 -69.75)"], "keywords": "Amundsen Sea; Antarctic; Antarctica; CTD; CTD Data; Current Measurements; NBP0901; Oceans; Physical Oceanography; Pine Island Bay; Pine Island Glacier; R/v Nathaniel B. Palmer; Salinity; Southern Ocean; Temperature", "locations": "Antarctica; Antarctic; Southern Ocean; Pine Island Glacier; Pine Island Bay; Amundsen Sea", "north": -64.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Huber, Bruce; Jacobs, Stanley", "project_titles": "Collaborative International Research: Amundsen Sea Influence on West Antarctic Ice Sheet Stability and Sea Level Rise - IPY/ASEP", "projects": [{"proj_uid": "p0000332", "repository": "USAP-DC", "title": "Collaborative International Research: Amundsen Sea Influence on West Antarctic Ice Sheet Stability and Sea Level Rise - IPY/ASEP"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -75.5, "title": "Processed Temperature, Salinity, and Current Measurement Data from the Amundsen Sea acquired during the Nathaniel B. Palmer expedition NBP0901", "uid": "601350", "west": -130.0}, {"awards": "1246463 Burns, Jennifer", "bounds_geometry": ["POINT(165 -77)"], "date_created": "Tue, 23 Jun 2020 00:00:00 GMT", "description": "For Figures 2 and 4 In Beltran et al. PNAS", "east": 165.0, "geometry": ["POINT(165 -77)"], "keywords": "Animal Behavior Observation; Antarctica; Biota; McMurdo Sound; Ross Sea; Seal Dive Data; Weddell Seal", "locations": "Antarctica; McMurdo Sound; Ross Sea", "north": -77.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Burns, Jennifer", "project_titles": "The Cost of A New Fur Coat: Interactions between Molt and Reproduction in Weddell Seals", "projects": [{"proj_uid": "p0000229", "repository": "USAP-DC", "title": "The Cost of A New Fur Coat: Interactions between Molt and Reproduction in Weddell Seals"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.0, "title": "Seasonal Dive Data ", "uid": "601338", "west": 165.0}, {"awards": "1246465 Brook, Edward J.", "bounds_geometry": ["POINT(-112.1115 -79.481)"], "date_created": "Mon, 22 Jun 2020 00:00:00 GMT", "description": "CO2 concentrations in trapped air from the WAIS Divide ice core for Marine Isotope Stage 3 (age range for data 23-67 ka). Methods described in Marcott et al. (2014; Nature, 515, 616-619) and Ahn et al. (2009; Journal of Glaciology, 55, 499-506). ", "east": -112.1115, "geometry": ["POINT(-112.1115 -79.481)"], "keywords": "Antarctica; Carbon Cycle; CO2; Gas Chromatograph; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core; Ice Core Records; WAIS Divide", "locations": "Antarctica; WAIS Divide", "north": -79.481, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Brook, Edward J.", "project_titles": "Completing the WAIS Divide Ice Core CO2 record", "projects": [{"proj_uid": "p0010110", "repository": "USAP-DC", "title": "Completing the WAIS Divide Ice Core CO2 record"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.481, "title": "WAIS Divide Ice Core Marine Isotope Stage 3 CO2 record", "uid": "601337", "west": -112.1115}, {"awards": "1341669 DeMaster, David; 0732711 Smith, Craig", "bounds_geometry": ["POLYGON((-61 -64,-60.5 -64,-60 -64,-59.5 -64,-59 -64,-58.5 -64,-58 -64,-57.5 -64,-57 -64,-56.5 -64,-56 -64,-56 -64.1,-56 -64.2,-56 -64.3,-56 -64.4,-56 -64.5,-56 -64.6,-56 -64.7,-56 -64.8,-56 -64.9,-56 -65,-56.5 -65,-57 -65,-57.5 -65,-58 -65,-58.5 -65,-59 -65,-59.5 -65,-60 -65,-60.5 -65,-61 -65,-61 -64.9,-61 -64.8,-61 -64.7,-61 -64.6,-61 -64.5,-61 -64.4,-61 -64.3,-61 -64.2,-61 -64.1,-61 -64))"], "date_created": "Fri, 19 Jun 2020 00:00:00 GMT", "description": "This file contains Pb-210 data from bulk sediments beneath the collapsed Larsen A Ice Shelf and C-14 data from the organic fraction of the same samples.", "east": -56.0, "geometry": ["POINT(-58.5 -64.5)"], "keywords": "Antarctica; Carbon-14; Larsen Ice Shelf; Lead-210; Marine Sediments; Radioisotope Analysis", "locations": "Antarctica; Larsen Ice Shelf", "north": -64.0, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Organisms and Ecosystems", "persons": "DeMaster, David; Taylor, Richard", "project_titles": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans; Using Radiochemical Data from Collapsed Ice Shelf Sediments to Understand the Nature and Timing of the Benthic Response to High-Latitude Climate Change", "projects": [{"proj_uid": "p0000382", "repository": "USAP-DC", "title": "Using Radiochemical Data from Collapsed Ice Shelf Sediments to Understand the Nature and Timing of the Benthic Response to High-Latitude Climate Change"}, {"proj_uid": "p0000101", "repository": "USAP-DC", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "LARISSA", "south": -65.0, "title": "Radioisotope data (C-14 and Pb-210) from bulk sediments, Larsen A Ice Shelf", "uid": "601336", "west": -61.0}, {"awards": "0087401 Smith, Walker", "bounds_geometry": ["POLYGON((-179.999 -77,-179.1991 -77,-178.3992 -77,-177.5993 -77,-176.7994 -77,-175.9995 -77,-175.1996 -77,-174.3997 -77,-173.5998 -77,-172.7999 -77,-172 -77,-172 -77.07,-172 -77.14,-172 -77.21,-172 -77.28,-172 -77.35,-172 -77.42,-172 -77.49,-172 -77.56,-172 -77.63,-172 -77.7,-172.7999 -77.7,-173.5998 -77.7,-174.3997 -77.7,-175.1996 -77.7,-175.9995 -77.7,-176.7994 -77.7,-177.5993 -77.7,-178.3992 -77.7,-179.1991 -77.7,-179.999 -77.7,-179.999 -77.63,-179.999 -77.56,-179.999 -77.49,-179.999 -77.42,-179.999 -77.35,-179.999 -77.28,-179.999 -77.21,-179.999 -77.14,-179.999 -77.07,-179.999 -77))"], "date_created": "Wed, 17 Jun 2020 00:00:00 GMT", "description": "This data set was acquired with a Turner Designs 10-AU-005 Fluorometer and WET Labs FLSB Fluorometer on moorings deployed in the Ross Sea in December 2005. Moorings were retrieved during Nathaniel B. Palmer expedition NBP0601A conducted in 2006 (Chief Scientist: Dr. Walker Smith; Investigator(s): Dr. Vernon Asper). These data files are of ASCII format and include Fluorescence data. Data were acquired as part of the project(s): Interannual variability in the Antarctic - Ross Sea (IVARS): Nutrients, and funding was provided by NSF grant(s): ANT00-87401.", "east": -172.0, "geometry": ["POINT(-175.9995 -77.35)"], "keywords": "Antarctica; Flourometer; Mooring; NBP0601A; Ross Sea; Southern Ocean", "locations": "Southern Ocean; Ross Sea; Antarctica", "north": -77.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Asper, Vernon; Smith, Walker", "project_titles": "Interannual Variability in the Antarctic-Ross Sea (IVARS): Nutrients and Seasonal Production", "projects": [{"proj_uid": "p0000803", "repository": "USAP-DC", "title": "Interannual Variability in the Antarctic-Ross Sea (IVARS): Nutrients and Seasonal Production"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.7, "title": "Fluorometer Data acquired on Moorings deployed the Ross Sea and recovered during the Nathaniel B. Palmer expedition NBP0601A (2006)", "uid": "601333", "west": -179.999}, {"awards": "1907974 Saltzman, Eric", "bounds_geometry": ["POLYGON((129.26 -89.86,130.261 -89.86,131.262 -89.86,132.263 -89.86,133.264 -89.86,134.265 -89.86,135.266 -89.86,136.267 -89.86,137.268 -89.86,138.269 -89.86,139.27 -89.86,139.27 -89.861,139.27 -89.862,139.27 -89.863,139.27 -89.864,139.27 -89.865,139.27 -89.866,139.27 -89.867,139.27 -89.868,139.27 -89.869,139.27 -89.87,138.269 -89.87,137.268 -89.87,136.267 -89.87,135.266 -89.87,134.265 -89.87,133.264 -89.87,132.263 -89.87,131.262 -89.87,130.261 -89.87,129.26 -89.87,129.26 -89.869,129.26 -89.868,129.26 -89.867,129.26 -89.866,129.26 -89.865,129.26 -89.864,129.26 -89.863,129.26 -89.862,129.26 -89.861,129.26 -89.86))"], "date_created": "Tue, 09 Jun 2020 00:00:00 GMT", "description": "This data set contains measurements of molecular hydrogen (H2) in firn air samples collected at South Pole in 2001.", "east": 139.27, "geometry": ["POINT(134.265 -89.865)"], "keywords": "Antarctica; Firn; Glaciology; Hydrogen; Ice Core Records; Snow/ice; Snow/Ice; South Pole", "locations": "South Pole; Antarctica", "north": -89.86, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Saltzman, Eric", "project_titles": "EAGER: Feasibility of Reconstructing the Atmospheric History of Molecular Hydrogen from Antarctic Ice", "projects": [{"proj_uid": "p0010106", "repository": "USAP-DC", "title": "EAGER: Feasibility of Reconstructing the Atmospheric History of Molecular Hydrogen from Antarctic Ice"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -89.87, "title": "H2 in South Pole firn air", "uid": "601332", "west": 129.26}, {"awards": "1443576 Panter, Kurt", "bounds_geometry": ["POLYGON((-154.1 -86.9,-154.03 -86.9,-153.96 -86.9,-153.89 -86.9,-153.82 -86.9,-153.75 -86.9,-153.68 -86.9,-153.61 -86.9,-153.54 -86.9,-153.47 -86.9,-153.4 -86.9,-153.4 -86.92,-153.4 -86.94,-153.4 -86.96,-153.4 -86.98,-153.4 -87,-153.4 -87.02,-153.4 -87.04,-153.4 -87.06,-153.4 -87.08,-153.4 -87.1,-153.47 -87.1,-153.54 -87.1,-153.61 -87.1,-153.68 -87.1,-153.75 -87.1,-153.82 -87.1,-153.89 -87.1,-153.96 -87.1,-154.03 -87.1,-154.1 -87.1,-154.1 -87.08,-154.1 -87.06,-154.1 -87.04,-154.1 -87.02,-154.1 -87,-154.1 -86.98,-154.1 -86.96,-154.1 -86.94,-154.1 -86.92,-154.1 -86.9))"], "date_created": "Fri, 05 Jun 2020 00:00:00 GMT", "description": "Mt. Early and Sheridan Bluff (87\u00b0S) are the above ice expression of Earth\u2019s southernmost volcanic field that lies approximately 300 km from the South Pole. The dataset supplies the locations and lithological descriptions of the units that the samples were collected from for dating and petrological study. Fundamental compositional information on the mafic volcanic rock samples include whole rock MgO concentrations (wt.%), the forsterite content of olivine and the oxygen isotopic composition of olivine. The dataset also provides a record of what samples have been analyzed for major and trace elements by XRF and ICP-MS, mineral chemistry by EMPA, radiogenic isotopes of Sr, Nd and Pb on whole rock powders by ICP-MS and dating by 40Ar/39Ar method.", "east": -153.4, "geometry": ["POINT(-153.75 -87)"], "keywords": "Antarctica; Chemistry:rock; Chemistry:Rock; Geochronology; Glacial Volcanism; Magma Differentiation; Major Elements; Mantle Melting; Solid Earth; Trace Elements; Transantarctic Mountains", "locations": "Transantarctic Mountains; Antarctica", "north": -86.9, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Panter, Kurt", "project_titles": "Investigating Early Miocene Sub-ice Volcanoes in Antarctica for Improved Modeling and understanding of a Large Magmatic Province", "projects": [{"proj_uid": "p0010105", "repository": "USAP-DC", "title": "Investigating Early Miocene Sub-ice Volcanoes in Antarctica for Improved Modeling and understanding of a Large Magmatic Province"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -87.1, "title": "Volcanological and Petrological measurements on Mt. Early and Sheridan Bluff volcanoes, upper Scott Glacier, Antarctica ", "uid": "601331", "west": -154.1}, {"awards": "1744584 Klein, Andrew; 1744550 Amsler, Charles; 1744570 Galloway, Aaron; 1744602 Iken, Katrin", "bounds_geometry": null, "date_created": "Thu, 04 Jun 2020 00:00:00 GMT", "description": "This .cvs file contains the latitude and longitude, along with closest geographic names, for the 15 study sites visited by projects projects ANT-1744550, -1744570, -1744584, and -1744602 during ARSV Laurence M. Gould cruise LMG 19-04 in April and May 2019.", "east": null, "geometry": null, "keywords": "Antarctica; Antarctic Peninsula; Biota; LMG1904; R/v Laurence M. Gould; Sample Location", "locations": "Antarctica; Antarctic Peninsula", "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "Amsler, Charles", "project_titles": "Collaborative Research: Sea ice as a driver of Antarctic benthic macroalgal community composition and nearshore trophic connectivity", "projects": [{"proj_uid": "p0010104", "repository": "USAP-DC", "title": "Collaborative Research: Sea ice as a driver of Antarctic benthic macroalgal community composition and nearshore trophic connectivity"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Latitude and longitude data for project study sites", "uid": "601330", "west": null}, {"awards": "1643722 Brook, Edward J.", "bounds_geometry": ["POINT(180 -90)"], "date_created": "Wed, 03 Jun 2020 00:00:00 GMT", "description": "This data set contains measurements of atmospheric methane in the South Pole Ice core made at both Oregon State University and Penn State University, as well as a gas age time scale for the core. In both laboratories methane was measured using a melt-refreeze technique to liberate extracted air and using a gas chromatograph with flame ionization detection to quantify the methane concentration, by comparison to calibrated air standards. To construct the gas time scale abrupt changes in atmospheric methane during the glacial period and centennial methane variability during the Holocene were used to synchronize the South Pole gas record with analogous data from the West Antarctic Ice Sheet Divide ice core. Stratigraphic matching based on visual optimization was verified using an automated matching algorithm. The South Pole ice core recovers all expected changes in methane based on previous records. In combination with an existing ice age scale (Winski et al., 2019, Clim. Past, 15, 1793\u20131808) an independent estimate of the gas age-ice age difference is also provided. A full description of the data and gas age scale are provided in Epifanio et al., 2020 (Climate of the Past, 16, 2431-2444). ", "east": 180.0, "geometry": ["POINT(180 -90)"], "keywords": "Antarctica; Gas Chromatography; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Methane; South Pole", "locations": "Antarctica; South Pole", "north": -90.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Brook, Edward J.", "project_titles": "A High Resolution Atmospheric Methane Record from the South Pole Ice Core", "projects": [{"proj_uid": "p0010102", "repository": "USAP-DC", "title": "A High Resolution Atmospheric Methane Record from the South Pole Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -90.0, "title": "South Pole Ice Core Methane Data and Gas Age Time Scale", "uid": "601329", "west": 180.0}, {"awards": "1443386 Emslie, Steven", "bounds_geometry": ["POLYGON((-180 -60,-180 -60,-180 -60,-180 -60,-180 -60,-180 -60,-180 -60,-180 -60,-180 -60,-180 -60,-180 -60,-180 -61.130769444,-180 -62.261538888,-180 -63.392308332,-180 -64.523077776,-180 -65.65384722,-180 -66.784616664,-180 -67.915386108,-180 -69.046155552,-180 -70.176924996,-180 -71.30769444,-180 -71.30769444,-180 -71.30769444,-180 -71.30769444,-180 -71.30769444,-180 -71.30769444,-180 -71.30769444,-180 -71.30769444,-180 -71.30769444,-180 -71.30769444,180 -71.30769444,179.019305556 -71.30769444,178.038611112 -71.30769444,177.057916668 -71.30769444,176.077222224 -71.30769444,175.09652778 -71.30769444,174.115833336 -71.30769444,173.135138892 -71.30769444,172.154444448 -71.30769444,171.173750004 -71.30769444,170.19305556 -71.30769444,170.19305556 -70.176924996,170.19305556 -69.046155552,170.19305556 -67.915386108,170.19305556 -66.784616664,170.19305556 -65.65384722,170.19305556 -64.523077776,170.19305556 -63.392308332,170.19305556 -62.261538888,170.19305556 -61.130769444,170.19305556 -60,171.173750004 -60,172.154444448 -60,173.135138892 -60,174.115833336 -60,175.09652778 -60,176.077222224 -60,177.057916668 -60,178.038611112 -60,179.019305556 -60,-180 -60))"], "date_created": "Tue, 02 Jun 2020 00:00:00 GMT", "description": "We report new discoveries and radiocarbon dates on active and abandoned Ad\u00e9lie penguin (Pygoscelis adeliae) colonies at Cape Adare, Antarctica. This colony, first established at approximately 2000 BP (calendar years before present, i.e. 1950), is currently the largest for this species with approximately 338 000 breeding pairs, most located on lowlying Ridley Beach. We hypothesize that this colony first formed after fast ice began blocking open-water access by breeding penguins to the Scott Coast in the southern Ross Sea during a cooling period also at approximately 2000 BP. Our results suggest that the new colony at Cape Adare continued to grow, expanding to a large upper terrace above Ridley Beach, until it exceeded approximately 500 000 breeding pairs (a \u0027supercolony\u0027) by approximately 1200 BP. The high marine productivity associated with the Ross Sea polynya and continental shelf break supported this growth, but the colony collapsed to its present size for unknown reasons after approximately 1200 BP. Ridley Beach will probably be abandoned in the near future due to rising sea level in this region. We predict that penguins will retreat to higher elevations at Cape Adare and that the Scott Coast will be reoccupied by breeding penguins as fast ice continues to dissipate earlier each summer, restoring open-water access to beaches there.", "east": 170.19305556, "geometry": ["POINT(175.09652778 -65.65384722)"], "keywords": "Adelie Penguin; Antarctica; Biota; Cape Adare; East Antarctica; Population Movement; Pygoscelis Adeliae; Radiocarbon; Ross Sea; Sea Level Rise; Stable Isotopes", "locations": "Cape Adare; Antarctica; Ross Sea; East Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "McKenzie, Ashley; Patterson, William; Emslie, Steven D.", "project_titles": "Collaborative Research: Investigating Holocene Shifts in the Diets and Paleohistory of Antarctic Krill Predators", "projects": [{"proj_uid": "p0010047", "repository": "USAP-DC", "title": "Collaborative Research: Investigating Holocene Shifts in the Diets and Paleohistory of Antarctic Krill Predators"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -71.30769444, "title": "The rise and fall of an ancient Adelie penguin \u0027supercolony\u0027 at Cape Adare, Antarctica", "uid": "601327", "west": -180.0}, {"awards": "1807522 Jones, Tyler", "bounds_geometry": ["POINT(-112.1115 -79.481)"], "date_created": "Tue, 26 May 2020 00:00:00 GMT", "description": "The original water stable isotope data for the WAIS Divide Deep Ice Core was generated under the University of Colorado INSTAAR Stable Isotope Lab (NSF Award# 1443328). This data set contains high-resolution dD and d18O data for the West Antarctic Ice Sheet (WAIS) Divide Ice core. Drilling was initiated in 2006 and completed in 2011, and subsequent analyses on the ice were performed at the University of Colorado INSTAAR Stable Isotope Lab using Continuous Flow Analysis (CFA). The targeted resampling of the WAIS Divide Ice core (1035.4 - 1368.2m) occurred for this grant (NSF OPP - Antarctic Glaciology 1807522) to replace data analyzed on an older generation Laser Absorption Spectroscopy instrument. The resampling interval was identified using information theory.", "east": -112.1115, "geometry": ["POINT(-112.1115 -79.481)"], "keywords": "Antarctica; Delta 18O; Delta Deuterium; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core; Ice Core Records; Snow/ice; Snow/Ice; WAIS Divide Ice Core; Water Isotopes; West Antarctic Ice Sheet", "locations": "Antarctica; West Antarctic Ice Sheet", "north": -79.481, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Morris, Valerie; Jones, Tyler R.; Vaughn, Bruce; White, James", "project_titles": "Collaborative Research: Targeted resampling of deep polar ice cores using information theory", "projects": [{"proj_uid": "p0010100", "repository": "USAP-DC", "title": "Collaborative Research: Targeted resampling of deep polar ice cores using information theory"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.481, "title": "Mid-Holocene high-resolution water isotope time series for the WAIS Divide ice core", "uid": "601326", "west": -112.1115}, {"awards": null, "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Wed, 20 May 2020 00:00:00 GMT", "description": "Temperature mesaurements from 10-meter depth in drill holes, dating back prior to 1956 and the International Geophysical Year, including measurements from several major recent surveys. Data cover the entire continental ice sheet and several ice shelves, but coverage density is generally low. For more information, please see the notes available for each 10-meter data set, and the list of related publications. The deeper drill-hole temperature data collection also covers a large portion of the ice sheet. The time frame covered by this collection is 1949-1979.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Firn Temperature Measurements", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": null, "persons": "Scambos, Ted", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -90.0, "title": "Compilation of ice temperature measurements at 10 m depth from international traverses 1957-1996.", "uid": "601325", "west": -180.0}, {"awards": null, "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Wed, 20 May 2020 00:00:00 GMT", "description": "Shallow firn temperature records made at the Byrd, Ellesworth, Wilkes and South Pole sites during the International Geophysical Year (1957-58). Depths of measurements range from the surface to as deep as 16m, on intervals of 0.5m to 8m. Time intervals of measurements vary from one day to one month. ", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Firn Temperature Measurements", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": null, "persons": "Goldthwait, Richard, P; Pirrit, John; Hollin, John; Giovineto, Mario", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -90.0, "title": "Shallow firn temperature records", "uid": "601324", "west": -180.0}, {"awards": "1142167 Pettit, Erin", "bounds_geometry": ["POLYGON((-112.3 -79.2,-112.22 -79.2,-112.14 -79.2,-112.06 -79.2,-111.98 -79.2,-111.9 -79.2,-111.82 -79.2,-111.74 -79.2,-111.66 -79.2,-111.58 -79.2,-111.5 -79.2,-111.5 -79.23,-111.5 -79.26,-111.5 -79.29,-111.5 -79.32,-111.5 -79.35,-111.5 -79.38,-111.5 -79.41,-111.5 -79.44,-111.5 -79.47,-111.5 -79.5,-111.58 -79.5,-111.66 -79.5,-111.74 -79.5,-111.82 -79.5,-111.9 -79.5,-111.98 -79.5,-112.06 -79.5,-112.14 -79.5,-112.22 -79.5,-112.3 -79.5,-112.3 -79.47,-112.3 -79.44,-112.3 -79.41,-112.3 -79.38,-112.3 -79.35,-112.3 -79.32,-112.3 -79.29,-112.3 -79.26,-112.3 -79.23,-112.3 -79.2))"], "date_created": "Fri, 15 May 2020 00:00:00 GMT", "description": "We tested the ability of phase sensitive radar (ApRES) to detect vertical strain throughout the depth of an ice sheet 3400m thick. ", "east": -111.5, "geometry": ["POINT(-111.9 -79.35)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Penetrating Radar; Ice Strain; Phase Sensitive Radar; Radar; Snow/ice; Snow/Ice; WAIS Divide", "locations": "WAIS Divide; Antarctica", "north": -79.2, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Pettit, Erin", "project_titles": "Collaborative Research: VeLveT Ice - eVoLution of Fabric and Texture in Ice at WAIS Divide, West Antarctica", "projects": [{"proj_uid": "p0010098", "repository": "USAP-DC", "title": "Collaborative Research: VeLveT Ice - eVoLution of Fabric and Texture in Ice at WAIS Divide, West Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.5, "title": "ApRES Vertical Strain Study", "uid": "601323", "west": -112.3}, {"awards": "1142167 Pettit, Erin", "bounds_geometry": ["POLYGON((-112.3 -79.2,-112.22 -79.2,-112.14 -79.2,-112.06 -79.2,-111.98 -79.2,-111.9 -79.2,-111.82 -79.2,-111.74 -79.2,-111.66 -79.2,-111.58 -79.2,-111.5 -79.2,-111.5 -79.23,-111.5 -79.26,-111.5 -79.29,-111.5 -79.32,-111.5 -79.35,-111.5 -79.38,-111.5 -79.41,-111.5 -79.44,-111.5 -79.47,-111.5 -79.5,-111.58 -79.5,-111.66 -79.5,-111.74 -79.5,-111.82 -79.5,-111.9 -79.5,-111.98 -79.5,-112.06 -79.5,-112.14 -79.5,-112.22 -79.5,-112.3 -79.5,-112.3 -79.47,-112.3 -79.44,-112.3 -79.41,-112.3 -79.38,-112.3 -79.35,-112.3 -79.32,-112.3 -79.29,-112.3 -79.26,-112.3 -79.23,-112.3 -79.2))"], "date_created": "Fri, 15 May 2020 00:00:00 GMT", "description": "We tested the ability of phase sensitive radar (ApRES) to detect firn density profile towards developing a simpler, non destructive, faster method than firn coring. ", "east": -111.5, "geometry": ["POINT(-111.9 -79.35)"], "keywords": "Antarctica; Firn; Firn Density; Glaciology; Ice Penetrating Radar; Phase Sensitive Radar; Radar; Snow/ice; Snow/Ice; WAIS Divide", "locations": "WAIS Divide; Antarctica", "north": -79.2, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Pettit, Erin", "project_titles": "Collaborative Research: VeLveT Ice - eVoLution of Fabric and Texture in Ice at WAIS Divide, West Antarctica", "projects": [{"proj_uid": "p0010098", "repository": "USAP-DC", "title": "Collaborative Research: VeLveT Ice - eVoLution of Fabric and Texture in Ice at WAIS Divide, West Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.5, "title": "ApRES Firn Density Study", "uid": "601322", "west": -112.3}, {"awards": "0636773 DeMaster, David; 1341669 DeMaster, David", "bounds_geometry": ["POLYGON((-71 -64,-70.4 -64,-69.8 -64,-69.2 -64,-68.6 -64,-68 -64,-67.4 -64,-66.8 -64,-66.2 -64,-65.6 -64,-65 -64,-65 -64.7,-65 -65.4,-65 -66.1,-65 -66.8,-65 -67.5,-65 -68.2,-65 -68.9,-65 -69.6,-65 -70.3,-65 -71,-65.6 -71,-66.2 -71,-66.8 -71,-67.4 -71,-68 -71,-68.6 -71,-69.2 -71,-69.8 -71,-70.4 -71,-71 -71,-71 -70.3,-71 -69.6,-71 -68.9,-71 -68.2,-71 -67.5,-71 -66.8,-71 -66.1,-71 -65.4,-71 -64.7,-71 -64))"], "date_created": "Mon, 11 May 2020 00:00:00 GMT", "description": "This data set is used to describe a new technique for assessing labile organic carbon (LOC) abundances and mean residence times in marine sediments. Radiocarbon is used to determine abundances of labile organic carbon and then a diagenetic organic carbon model, coupled with sediment biotrubation coefficients, is used to assess LOC mean residence times. ", "east": -65.0, "geometry": ["POINT(-68 -67.5)"], "keywords": "Antarctica; Antarctic Peninsula; Biota; Bioturbation Coefficients; Diagenesis; Labile Organic Carbon; LOC Mean Residence Times; Marguerite Bay; Oceans; Organic Carbon Degradation Rates; Sediment Core", "locations": "Marguerite Bay; Antarctic Peninsula; Antarctica", "north": -64.0, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Organisms and Ecosystems", "persons": "DeMaster, David; Taylor, Richard; Smith, Craig; Isla, Enrique; Thomas, Carrie", "project_titles": "Collaborative Research: Benthic Faunal Feeding Dynamics on the Antarctic Shelf and the Effects of Global Climate Change on Bentho-Pelagic Coupling; Using Radiochemical Data from Collapsed Ice Shelf Sediments to Understand the Nature and Timing of the Benthic Response to High-Latitude Climate Change", "projects": [{"proj_uid": "p0000552", "repository": "USAP-DC", "title": "Collaborative Research: Benthic Faunal Feeding Dynamics on the Antarctic Shelf and the Effects of Global Climate Change on Bentho-Pelagic Coupling"}, {"proj_uid": "p0000382", "repository": "USAP-DC", "title": "Using Radiochemical Data from Collapsed Ice Shelf Sediments to Understand the Nature and Timing of the Benthic Response to High-Latitude Climate Change"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -71.0, "title": "Labile Organic Carbon distributions on the West Antarctic Peninsula Shelf", "uid": "601319", "west": -71.0}, {"awards": "1542885 Dunham, Eric; 1656518 Gumport, Patricia", "bounds_geometry": null, "date_created": "Mon, 11 May 2020 00:00:00 GMT", "description": "We quantify sliding stability and rupture styles for a horizontal interface between an elastic layer and stiffer elastic half-space with a free surface on top and rate-and-state friction on the interface. Specific motivation (and model parameters) comes from quasi-periodic slow slip events on the Whillans Ice Plain in West Antarctica. We quantify the influence of layer thickness on sliding stability, specifically whether steady loading of the system produces steady sliding or sequences of stick-slip events. This dataset contains input files from different parts of parameter space to demonstrate different styles of slip (steady sliding, slow slip sequences, and fast slip sequences).", "east": null, "geometry": null, "keywords": "Antarctica; Computer Model; Glaciology; Model Data; Shear Stress; Solid Earth; Whillans Ice Stream", "locations": "Whillans Ice Stream; Antarctica", "north": null, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Abrahams, Lauren", "project_titles": "Collaborative Research: Characterizing Brittle Failure and Fracture Propagation in Fast Ice Sliding with Dynamic Rupture Models based on Whillans Ice Stream Seismic/Geodetic Data", "projects": [{"proj_uid": "p0010138", "repository": "USAP-DC", "title": "Collaborative Research: Characterizing Brittle Failure and Fracture Propagation in Fast Ice Sliding with Dynamic Rupture Models based on Whillans Ice Stream Seismic/Geodetic Data"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Earthquake Sequence Dynamics at the Interface Between an Elastic Layer and Underlying Half-Space in Antiplane Shear", "uid": "601320", "west": null}, {"awards": "1440435 Ducklow, Hugh; 1644209 Goldbogen, Jeremy", "bounds_geometry": ["POLYGON((-64.5 -63,-63.95 -63,-63.4 -63,-62.85 -63,-62.3 -63,-61.75 -63,-61.2 -63,-60.65 -63,-60.1 -63,-59.55 -63,-59 -63,-59 -63.22,-59 -63.44,-59 -63.66,-59 -63.88,-59 -64.1,-59 -64.32,-59 -64.54,-59 -64.76,-59 -64.98,-59 -65.2,-59.55 -65.2,-60.1 -65.2,-60.65 -65.2,-61.2 -65.2,-61.75 -65.2,-62.3 -65.2,-62.85 -65.2,-63.4 -65.2,-63.95 -65.2,-64.5 -65.2,-64.5 -64.98,-64.5 -64.76,-64.5 -64.54,-64.5 -64.32,-64.5 -64.1,-64.5 -63.88,-64.5 -63.66,-64.5 -63.44,-64.5 -63.22,-64.5 -63))"], "date_created": "Sun, 10 May 2020 00:00:00 GMT", "description": "This dataset contains UAV (drone) still images and video footage from whales in the Antarctic Peninsula region taken from LM Gould expedition (LMG1802) and small zodiacs. It also contains flight tracks as kml files.", "east": -59.0, "geometry": ["POINT(-61.75 -64.1)"], "keywords": "Aerial Imagery; Antarctica; Antarctic Peninsula; Biota; Camera; Humpback Whales; LMG1802; LTER; Minke Whales; Oceans; Palmer Station; Photo; Photo/video; Photo/Video; R/v Laurence M. Gould; Species Size; UAV; Video Data; Whales", "locations": "Antarctic Peninsula; Antarctica; Palmer Station", "north": -63.0, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Friedlaender, Ari; Dale, Julian; Nowacek, Douglas; Bierlich, KC", "project_titles": "LTER Palmer, Antarctica (PAL): Land-Shelf-Ocean Connectivity, Ecosystem Resilience and Transformation in a Sea-Ice Influenced Pelagic Ecosystem", "projects": [{"proj_uid": "p0000133", "repository": "USAP-DC", "title": "LTER Palmer, Antarctica (PAL): Land-Shelf-Ocean Connectivity, Ecosystem Resilience and Transformation in a Sea-Ice Influenced Pelagic Ecosystem"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "LTER", "south": -65.2, "title": "UAV images and video of whales in the Antarctic Penisula during LMG1802", "uid": "601318", "west": -64.5}, {"awards": null, "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Tue, 05 May 2020 00:00:00 GMT", "description": "VELMAP is a compilation of ice velocity data of the Antarctic ice sheet and is intended for use by the polar scientific community. The data are presented in tabular form (ASCII format), containing latitude, longitude, speed, bearing, and error ranges. A metadata header describes the source of the data, the time of measurement, and gives details on measurement accuracy and precision.\r\n\r\nThe data sets were contributed by several investigators, in most cases from already-published work. Both in situ and image-based methods are used. References for the data sets are included with the data tables.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": null, "persons": "Scambos, Ted", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -90.0, "title": "VELMAP", "uid": "601317", "west": -180.0}, {"awards": null, "bounds_geometry": ["POINT(-168.626 -82.375)"], "date_created": "Tue, 05 May 2020 00:00:00 GMT", "description": "The Ross Ice Shelf Project (RISP) began in 1973, and lasted six field seasons. One of the primary goals for RISP was to drill a hole through the Ross Ice Shelf in order to study the ice, the ocean, and the ocean floor beneath the ice shelf. In late November 1974, during the second field season, the camp at J-9 (82.375S, 168.626W) was established, and this site was chosen for future deep core drilling.\r\nThis datset records ice shelf and sub-ice shelf temperature profiles taken between 1974 and 1977 at the J9 drill site in The Ross Ice Shelf. ", "east": -168.626, "geometry": ["POINT(-168.626 -82.375)"], "keywords": "Antarctica; Ross Ice Shelf", "locations": "Antarctica; Ross Ice Shelf", "north": -82.375, "nsf_funding_programs": null, "persons": "Clough, John", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -82.375, "title": "J-9 Drill Hole Temperatures", "uid": "601316", "west": -168.626}, {"awards": null, "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Mon, 04 May 2020 00:00:00 GMT", "description": "Raw Satellite Images acquired during several Nathaniel B. Palmer and LM Gould expeditions. These are mostly downloaded during the cruises, often directly using the ships satellite receiver (TerraSat system). The data include visible and infrared images. They are organized by expedition.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; LMG0301; LMG0302; LMG0304; LMG0309; LMG0411; LMG0412; LMG0413A; LMG0414; LMG0502; LMG0511; LMG0512; LMG0514; LMG0605; LMG0610; LMG0611; LMG0611B; LMG0612; LMG0717; LMG0804; LMG0808; LMG0809; LMG0901; LMG0905; LMG0906A; LMG0909; LMG0910; LMG1001; NBP0107; NBP0301; NBP0302; NBP0304A; NBP0305; NBP0305A; NBP0401; NBP0402; NBP0404; NBP0409; NBP0501; NBP0506; NBP0508; NBP0601; NBP0602A; NBP0603; NBP0608; NBP0701; NBP0702; NBP0703; NBP0709; NBP0710; NBP0711; NBP0801; NBP0802; NBP0803; NBP0804; NBP0805; NBP0806; NBP0808; NBP0901; NBP0908; NBP1101; NBP1102; Satellite; Satellite Imagery", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": null, "persons": null, "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -90.0, "title": "Raw satellite images from NB Palmer and LM Gould Antarctic cruises", "uid": "601313", "west": -180.0}, {"awards": "1142167 Pettit, Erin", "bounds_geometry": ["POINT(-180 -90)"], "date_created": "Mon, 04 May 2020 00:00:00 GMT", "description": "Acoustic Televiewer measures borehole shape and tilt. These data were collected to study detailed borehole deformation with respect to ice properties to expand our understanding of the flow law for ice. ", "east": -180.0, "geometry": ["POINT(-180 -90)"], "keywords": "Acoustic Televiewer; Anisotropy; Antarctica; Borehole Logging; Deformation; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Ice Flow; Snow/ice; Snow/Ice; South Pole; SPICEcore", "locations": "South Pole; Antarctica", "north": -90.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Pettit, Erin", "project_titles": "Collaborative Research: VeLveT Ice - eVoLution of Fabric and Texture in Ice at WAIS Divide, West Antarctica", "projects": [{"proj_uid": "p0010098", "repository": "USAP-DC", "title": "Collaborative Research: VeLveT Ice - eVoLution of Fabric and Texture in Ice at WAIS Divide, West Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -90.0, "title": "South Pole (SPICEcore) Borehole Deformation", "uid": "601315", "west": -180.0}, {"awards": "1043623 Miller, Scott", "bounds_geometry": ["POLYGON((-180 -57,-169.5 -57,-159 -57,-148.5 -57,-138 -57,-127.5 -57,-117 -57,-106.5 -57,-96 -57,-85.5 -57,-75 -57,-75 -59.1,-75 -61.2,-75 -63.3,-75 -65.4,-75 -67.5,-75 -69.6,-75 -71.7,-75 -73.8,-75 -75.9,-75 -78,-85.5 -78,-96 -78,-106.5 -78,-117 -78,-127.5 -78,-138 -78,-148.5 -78,-159 -78,-169.5 -78,180 -78,178.3 -78,176.6 -78,174.9 -78,173.2 -78,171.5 -78,169.8 -78,168.1 -78,166.4 -78,164.7 -78,163 -78,163 -75.9,163 -73.8,163 -71.7,163 -69.6,163 -67.5,163 -65.4,163 -63.3,163 -61.2,163 -59.1,163 -57,164.7 -57,166.4 -57,168.1 -57,169.8 -57,171.5 -57,173.2 -57,174.9 -57,176.6 -57,178.3 -57,-180 -57))"], "date_created": "Fri, 01 May 2020 00:00:00 GMT", "description": "This dataset contains meteorological and air-sea flux data (momentum, heat, and CO2 fluxes; CO2 gas transfer velocity) collected during the the Nathaniel B. Palmer expedition NBP1210 conducted in 2013. The files are of XLS format", "east": -75.0, "geometry": ["POINT(-136 -67.5)"], "keywords": "Air-Sea Flux; Air Temperature; Amundsen Sea; Antarctica; Antarctic Peninsula; Atmosphere; CO2; Flux; Meteorology; NBP1210; Oceans; Ross Sea; R/v Nathaniel B. Palmer; Southern Ocean; Water Temperature; Wind Direction; Wind Speed", "locations": "Antarctica; Antarctic Peninsula; Amundsen Sea; Ross Sea; Southern Ocean", "north": -57.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Miller, Scott; Butterworth, Brian", "project_titles": "Air-Sea Fluxes of Momentum, Heat, and Carbon Dioxide at High Wind Speeds in the Southern Ocean", "projects": [{"proj_uid": "p0010137", "repository": "USAP-DC", "title": "Air-Sea Fluxes of Momentum, Heat, and Carbon Dioxide at High Wind Speeds in the Southern Ocean"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Eddy covariance air-sea momentum, heat, and carbon dioxide fluxes in the Southern Ocean from the N.B. Palmer cruise NBP1210", "uid": "601309", "west": 163.0}, {"awards": "1143836 Leventer, Amy", "bounds_geometry": ["POLYGON((118 -65.5,118.3 -65.5,118.6 -65.5,118.9 -65.5,119.2 -65.5,119.5 -65.5,119.8 -65.5,120.1 -65.5,120.4 -65.5,120.7 -65.5,121 -65.5,121 -65.65,121 -65.8,121 -65.95,121 -66.1,121 -66.25,121 -66.4,121 -66.55,121 -66.7,121 -66.85,121 -67,120.7 -67,120.4 -67,120.1 -67,119.8 -67,119.5 -67,119.2 -67,118.9 -67,118.6 -67,118.3 -67,118 -67,118 -66.85,118 -66.7,118 -66.55,118 -66.4,118 -66.25,118 -66.1,118 -65.95,118 -65.8,118 -65.65,118 -65.5))"], "date_created": "Fri, 01 May 2020 00:00:00 GMT", "description": "This Biology Species Abundance data set was acquired with a ship-based Camera during Nathaniel B. Palmer expedition NBP1001 conducted in 2010 (Chief Scientist: Dr. Eugene Domack; Investigator: Dr. Craig Smith). The data file is in XLS format and includes Biology Species Abundance Biology data that has not been processed. The data was acquired as part of the project called Collaborative Research in IPY: Abrupt Environmental Change in the LARsen Ice Shelf System, Antarctica (LARISSA).", "east": 121.0, "geometry": ["POINT(119.5 -66.25)"], "keywords": "Antarctica; Benthic Images; Camera; East Antarctica; Marine Geoscience; NBP1402; Photo/video; Photo/Video; R/v Nathaniel B. Palmer; Sabrina Coast; Totten Glacier; Video Data; Yoyo Camera", "locations": "Totten Glacier; Sabrina Coast; Antarctica; East Antarctica", "north": -65.5, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Leventer, Amy; Post, Alexandra; Blankenship, Donald D.; Domack, Eugene Walter; Gulick, Sean; Huber, Bruce; Orsi, Alejandro; Shevenell, Amelia", "project_titles": "Collaborative Research: Totten Glacier System and the Marine Record of Cryosphere - Ocean Dynamics", "projects": [{"proj_uid": "p0000008", "repository": "USAP-DC", "title": "Collaborative Research: Totten Glacier System and the Marine Record of Cryosphere - Ocean Dynamics"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -67.0, "title": "Near-bottom Videos from the Southern Ocean acquired during R/V Nathaniel B. Palmer expedition NBP1402", "uid": "601312", "west": 118.0}, {"awards": "1143981 Domack, Eugene", "bounds_geometry": ["POLYGON((-66.5 -61.5,-65.85 -61.5,-65.2 -61.5,-64.55 -61.5,-63.9 -61.5,-63.25 -61.5,-62.6 -61.5,-61.95 -61.5,-61.3 -61.5,-60.65 -61.5,-60 -61.5,-60 -61.87,-60 -62.24,-60 -62.61,-60 -62.98,-60 -63.35,-60 -63.72,-60 -64.09,-60 -64.46,-60 -64.83,-60 -65.2,-60.65 -65.2,-61.3 -65.2,-61.95 -65.2,-62.6 -65.2,-63.25 -65.2,-63.9 -65.2,-64.55 -65.2,-65.2 -65.2,-65.85 -65.2,-66.5 -65.2,-66.5 -64.83,-66.5 -64.46,-66.5 -64.09,-66.5 -63.72,-66.5 -63.35,-66.5 -62.98,-66.5 -62.61,-66.5 -62.24,-66.5 -61.87,-66.5 -61.5))"], "date_created": "Fri, 01 May 2020 00:00:00 GMT", "description": "This data set was acquired with a camera during Laurence M. Gould expedition LMG1311 conducted in 2013. These data files are of JPEG format and include Photograph images that have not been processed", "east": -60.0, "geometry": ["POINT(-63.25 -63.35)"], "keywords": "Antarctica; Antarctic Peninsula; Benthic Images; Camera; LARISSA; LMG1311; Marine Geoscience; Photo; Photo/video; Photo/Video; R/v Laurence M. Gould", "locations": "Antarctica; Antarctic Peninsula", "north": -61.5, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Domack, Eugene Walter", "project_titles": "Continuation of the LARISSA Continuous GPS Network in View of Observed Dynamic Response to Antarctic Peninsula Ice Mass Balance and Required Geologic Constraints", "projects": [{"proj_uid": "p0000233", "repository": "USAP-DC", "title": "Continuation of the LARISSA Continuous GPS Network in View of Observed Dynamic Response to Antarctic Peninsula Ice Mass Balance and Required Geologic Constraints"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "LARISSA", "south": -65.2, "title": "Processed Camera Images acquired during the Laurence M. Gould expedition LMG1311", "uid": "601311", "west": -66.5}, {"awards": "1143836 Leventer, Amy", "bounds_geometry": ["POLYGON((118 -65.5,118.3 -65.5,118.6 -65.5,118.9 -65.5,119.2 -65.5,119.5 -65.5,119.8 -65.5,120.1 -65.5,120.4 -65.5,120.7 -65.5,121 -65.5,121 -65.65,121 -65.8,121 -65.95,121 -66.1,121 -66.25,121 -66.4,121 -66.55,121 -66.7,121 -66.85,121 -67,120.7 -67,120.4 -67,120.1 -67,119.8 -67,119.5 -67,119.2 -67,118.9 -67,118.6 -67,118.3 -67,118 -67,118 -66.85,118 -66.7,118 -66.55,118 -66.4,118 -66.25,118 -66.1,118 -65.95,118 -65.8,118 -65.65,118 -65.5))"], "date_created": "Fri, 01 May 2020 00:00:00 GMT", "description": "This data set was acquired with a Nikon D80 Digital Camera on a towed Yoyo camera system during R/V Nathaniel B. Palmer expedition NBP1402 conducted in 2014. These data files are of JPEG Image format and include Photograph data that have not been processed.", "east": 121.0, "geometry": ["POINT(119.5 -66.25)"], "keywords": "Antarctica; Benthic Images; Benthos; East Antarctica; Marine Geoscience; NBP1402; Photo; Photo/video; Photo/Video; R/v Nathaniel B. 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The files are of XLS format.", "east": 146.0, "geometry": ["POINT(131.75 -57.2)"], "keywords": "Air-Sea Flux; Air Temperature; Antarctica; Atmosphere; CO2; CO2 Concentrations; East Antarctica; Flux; Meteorology; NBP1402; Oceans; Relative Humidity; Salinity; Totten Glacier; Water Measurements; Water Temperature; Weather Station Data; Wind Direction; Wind Speed", "locations": "Totten Glacier; East Antarctica; Antarctica", "north": -47.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Miller, Scott; Butterworth, Brian", "project_titles": "Air-Sea Fluxes of Momentum, Heat, and Carbon Dioxide at High Wind Speeds in the Southern Ocean", "projects": [{"proj_uid": "p0010137", "repository": "USAP-DC", "title": "Air-Sea Fluxes of Momentum, Heat, and Carbon Dioxide at High Wind Speeds in the Southern Ocean"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -67.4, "title": "Eddy covariance air-sea momentum, heat, and carbon dioxide fluxes in the Southern Ocean from the N.B. Palmer cruise NBP1402", "uid": "601308", "west": 117.5}, {"awards": "1558448 Girton, James; 1341496 Girton, James", "bounds_geometry": ["POLYGON((-65 -62,-64.55 -62,-64.1 -62,-63.65 -62,-63.2 -62,-62.75 -62,-62.3 -62,-61.85 -62,-61.4 -62,-60.95 -62,-60.5 -62,-60.5 -62.35,-60.5 -62.7,-60.5 -63.05,-60.5 -63.4,-60.5 -63.75,-60.5 -64.1,-60.5 -64.45,-60.5 -64.8,-60.5 -65.15,-60.5 -65.5,-60.95 -65.5,-61.4 -65.5,-61.85 -65.5,-62.3 -65.5,-62.75 -65.5,-63.2 -65.5,-63.65 -65.5,-64.1 -65.5,-64.55 -65.5,-65 -65.5,-65 -65.15,-65 -64.8,-65 -64.45,-65 -64.1,-65 -63.75,-65 -63.4,-65 -63.05,-65 -62.7,-65 -62.35,-65 -62))"], "date_created": "Thu, 30 Apr 2020 00:00:00 GMT", "description": "This data set was acquired with a Nikon Camera on a towed YoYo camera platform during R/V Laurence M. Gould expedition LMG1703 conducted in 2017. 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Gould expedition LMG1703", "uid": "601302", "west": -65.0}, {"awards": "0636806 Smith, Craig; 0636773 DeMaster, David", "bounds_geometry": ["POLYGON((-72 -59,-71 -59,-70 -59,-69 -59,-68 -59,-67 -59,-66 -59,-65 -59,-64 -59,-63 -59,-62 -59,-62 -59.95,-62 -60.9,-62 -61.85,-62 -62.8,-62 -63.75,-62 -64.7,-62 -65.65,-62 -66.6,-62 -67.55,-62 -68.5,-63 -68.5,-64 -68.5,-65 -68.5,-66 -68.5,-67 -68.5,-68 -68.5,-69 -68.5,-70 -68.5,-71 -68.5,-72 -68.5,-72 -67.55,-72 -66.6,-72 -65.65,-72 -64.7,-72 -63.75,-72 -62.8,-72 -61.85,-72 -60.9,-72 -59.95,-72 -59))"], "date_created": "Thu, 30 Apr 2020 00:00:00 GMT", "description": "This data set was acquired with a Box Core Sediment Sampler, Digital Camera, and Sediment Core Sampler during Laurence M. Gould expedition LMG0802 conducted in 2008. The data files are in Microsoft Excel format and include Species List, Species Abundance, and Sediment Geochemistry data that was processed after collection.", "east": -62.0, "geometry": ["POINT(-67 -63.75)"], "keywords": "Antarctica; Antarctic Peninsula; Biota; Box Corer; Chlorophyll Concentration; LMG0802; Marcofauna; Megafauna; Oceans; R/v Laurence M. Gould; Seafloor Sampling; Species Abundance", "locations": "Antarctic Peninsula; Antarctica", "north": -59.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Ocean and Atmospheric Sciences", "persons": "Smith, Craig; DeMaster, David", "project_titles": "Collaborative Research: Benthic Faunal Feeding Dynamics on the Antarctic Shelf and the Effects of Global Climate Change on Bentho-Pelagic Coupling", "projects": [{"proj_uid": "p0000552", "repository": "USAP-DC", "title": "Collaborative Research: Benthic Faunal Feeding Dynamics on the Antarctic Shelf and the Effects of Global Climate Change on Bentho-Pelagic Coupling"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -68.5, "title": "Species List, Species Abundance, and Sediment Geochemistry processed data acquired during Laurence M. Gould expedition LMG0802", "uid": "601303", "west": -72.0}, {"awards": "9911617 Blankenship, Donald; 9978236 Bell, Robin", "bounds_geometry": ["POLYGON((101.5 -75.5,102.15 -75.5,102.8 -75.5,103.45 -75.5,104.1 -75.5,104.75 -75.5,105.4 -75.5,106.05 -75.5,106.7 -75.5,107.35 -75.5,108 -75.5,108 -75.85,108 -76.2,108 -76.55,108 -76.9,108 -77.25,108 -77.6,108 -77.95,108 -78.3,108 -78.65,108 -79,107.35 -79,106.7 -79,106.05 -79,105.4 -79,104.75 -79,104.1 -79,103.45 -79,102.8 -79,102.15 -79,101.5 -79,101.5 -78.65,101.5 -78.3,101.5 -77.95,101.5 -77.6,101.5 -77.25,101.5 -76.9,101.5 -76.55,101.5 -76.2,101.5 -75.85,101.5 -75.5))"], "date_created": "Tue, 28 Apr 2020 00:00:00 GMT", "description": "Processed IcePenetrating Radar Altimeter Shot Data (version 2) acquired during the SOAR Twin Otter expedition SOAR-LVS (2000)\r\nThis data set was acquired with a IcePenetrating Radar Altimeter during SOAR Twin Otter expedition SOAR-LVS conducted in 2000 (Chief Scientist: Dr. Robin Bell; Investigator(s): Dr. Robin Bell and Dr. Michael Studinger). These data files are of SEGY format and include Reflection Radar shot data and were processed after data collection. 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These data files are of ASCII format and include Bedrock Elevation data and were processed after data collection. 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These data files are of ASCII format and include Surface Elevation data and were processed after data collection. Data were acquired as part of the project(s): SOAR-Lake Vostok Survey (LVS) and Understanding the Boundary Conditions of the Lake Vostok Environment: A Site Survey for Future Work", "east": 108.0, "geometry": ["POINT(104.75 -77.25)"], "keywords": "Airborne Altimetry; Airborne Laser Altimeters; Airborne Radar; Airplane; Antarctica; East Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Sheet; Ice Sheet Elevation; Ice Surface; Lake Vostok; Radar Echo Sounder; SOAR; Surface Elevation", "locations": "Lake Vostok; East Antarctica; Antarctica", "north": -75.5, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Earth Sciences", "persons": "Studinger, Michael S.; Bell, Robin", "project_titles": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR); Understanding the Boundary Conditions of the Lake Vostok Environment: A Site Survey for Future Work\r\n", "projects": [{"proj_uid": "p0010097", "repository": "USAP-DC", "title": "Understanding the Boundary Conditions of the Lake Vostok Environment: A Site Survey for Future Work\r\n"}, {"proj_uid": "p0000125", "repository": "USAP-DC", "title": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.0, "title": "SOAR-Lake Vostok Survey surface elevation data", "uid": "601298", "west": 101.5}, {"awards": "9911617 Blankenship, Donald; 9978236 Bell, Robin", "bounds_geometry": ["POLYGON((101.5 -75.5,102.15 -75.5,102.8 -75.5,103.45 -75.5,104.1 -75.5,104.75 -75.5,105.4 -75.5,106.05 -75.5,106.7 -75.5,107.35 -75.5,108 -75.5,108 -75.85,108 -76.2,108 -76.55,108 -76.9,108 -77.25,108 -77.6,108 -77.95,108 -78.3,108 -78.65,108 -79,107.35 -79,106.7 -79,106.05 -79,105.4 -79,104.75 -79,104.1 -79,103.45 -79,102.8 -79,102.15 -79,101.5 -79,101.5 -78.65,101.5 -78.3,101.5 -77.95,101.5 -77.6,101.5 -77.25,101.5 -76.9,101.5 -76.55,101.5 -76.2,101.5 -75.85,101.5 -75.5))"], "date_created": "Tue, 28 Apr 2020 00:00:00 GMT", "description": "Processed IcePenetrating Radar Altimeter Data acquired during the SOAR Twin Otter expedition SOAR-LVS (2000)\r\nThis data set was acquired with a IcePenetrating Radar Altimeter during SOAR Twin Otter expedition SOAR-LVS conducted in 2000 (Chief Scientist: Dr. Robin Bell; Investigator(s): Dr. Robin Bell and Dr. Michael Studinger). These data files are of ASCII format and include Ice LayerThickness data and were processed after data collection. Data were acquired as part of the project(s): SOAR-Lake Vostok Survey (LVS) and Understanding the Boundary Conditions of the Lake Vostok Environment: A Site Survey for Future Work", "east": 108.0, "geometry": ["POINT(104.75 -77.25)"], "keywords": "Airborne Laser Altimeters; Airborne Radar; Airplane; Antarctica; East Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice; Ice Sheet; Ice Stratigraphy; Ice Thickness; Ice Thickness Distribution; Lake Vostok; Radar; Radar Altimetry; Radar Echo Sounder; SOAR; Subglacial Lake", "locations": "East Antarctica; Antarctica; Lake Vostok", "north": -75.5, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Earth Sciences", "persons": "Studinger, Michael S.; Bell, Robin", "project_titles": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR); Understanding the Boundary Conditions of the Lake Vostok Environment: A Site Survey for Future Work\r\n", "projects": [{"proj_uid": "p0000125", "repository": "USAP-DC", "title": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR)"}, {"proj_uid": "p0010097", "repository": "USAP-DC", "title": "Understanding the Boundary Conditions of the Lake Vostok Environment: A Site Survey for Future Work\r\n"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.0, "title": "SOAR-Lake Vostok Survey ice thickness data", "uid": "601297", "west": 101.5}, {"awards": "9911617 Blankenship, Donald; 9978236 Bell, Robin", "bounds_geometry": ["POLYGON((101.5 -75.5,102.15 -75.5,102.8 -75.5,103.45 -75.5,104.1 -75.5,104.75 -75.5,105.4 -75.5,106.05 -75.5,106.7 -75.5,107.35 -75.5,108 -75.5,108 -75.85,108 -76.2,108 -76.55,108 -76.9,108 -77.25,108 -77.6,108 -77.95,108 -78.3,108 -78.65,108 -79,107.35 -79,106.7 -79,106.05 -79,105.4 -79,104.75 -79,104.1 -79,103.45 -79,102.8 -79,102.15 -79,101.5 -79,101.5 -78.65,101.5 -78.3,101.5 -77.95,101.5 -77.6,101.5 -77.25,101.5 -76.9,101.5 -76.55,101.5 -76.2,101.5 -75.85,101.5 -75.5))"], "date_created": "Tue, 28 Apr 2020 00:00:00 GMT", "description": "Processed Magnetometer Data acquired during the SOAR Twin Otter expedition SOAR-LVS (2000)\r\nThis data set was acquired with a Magnetometer during SOAR Twin Otter expedition SOAR-LVS conducted in 2000 (Chief Scientist: Dr. Robin Bell; Investigator(s): Dr. Robin Bell and Dr. Michael Studinger). These data files are of ASCII format and include IGRF Anomaly Magnetic data and were processed after data collection. Data were acquired as part of the project(s): SOAR-Lake Vostok Survey (LVS) and Understanding the Boundary Conditions of the Lake Vostok Environment: A Site Survey for Future Work", "east": 108.0, "geometry": ["POINT(104.75 -77.25)"], "keywords": "Airborne Magnetic; Airplane; Antarctica; East Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Lake Vostok; Magnetic; Magnetic Anomaly; Magnetometer; Potential Field; SOAR; Solid Earth", "locations": "Antarctica; East Antarctica; Lake Vostok", "north": -75.5, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Earth Sciences", "persons": "Studinger, Michael S.; Bell, Robin", "project_titles": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR); Understanding the Boundary Conditions of the Lake Vostok Environment: A Site Survey for Future Work\r\n", "projects": [{"proj_uid": "p0010097", "repository": "USAP-DC", "title": "Understanding the Boundary Conditions of the Lake Vostok Environment: A Site Survey for Future Work\r\n"}, {"proj_uid": "p0000125", "repository": "USAP-DC", "title": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.0, "title": "SOAR-Lake Vostok survey magnetic anomaly data", "uid": "601296", "west": 101.5}, {"awards": "9911617 Blankenship, Donald; 9978236 Bell, Robin", "bounds_geometry": ["POLYGON((101.5 -75.5,102.15 -75.5,102.8 -75.5,103.45 -75.5,104.1 -75.5,104.75 -75.5,105.4 -75.5,106.05 -75.5,106.7 -75.5,107.35 -75.5,108 -75.5,108 -75.85,108 -76.2,108 -76.55,108 -76.9,108 -77.25,108 -77.6,108 -77.95,108 -78.3,108 -78.65,108 -79,107.35 -79,106.7 -79,106.05 -79,105.4 -79,104.75 -79,104.1 -79,103.45 -79,102.8 -79,102.15 -79,101.5 -79,101.5 -78.65,101.5 -78.3,101.5 -77.95,101.5 -77.6,101.5 -77.25,101.5 -76.9,101.5 -76.55,101.5 -76.2,101.5 -75.85,101.5 -75.5))"], "date_created": "Tue, 28 Apr 2020 00:00:00 GMT", "description": "Processed Gravimeter Data acquired during the SOAR Twin Otter expedition SOAR-LVS (2000). This data set was acquired with a Gravimeter during SOAR Twin Otter expedition SOAR-LVS conducted in 2000 (Investigator(s): Dr. Robin Bell and Dr. Michael Studinger). These data files are of ASCII format and include Free Air Anomaly Gravity data and were processed after data collection. Data were acquired as part of the project(s): SOAR-Lake Vostok Survey (LVS) and Understanding the Boundary Conditions of the Lake Vostok Environment: A Site Survey for Future Work.", "east": 108.0, "geometry": ["POINT(104.75 -77.25)"], "keywords": "Airborne Gravity; Airplane; Antarctica; East Antarctica; Free Air Gravity; Glaciers/ice Sheet; Glaciers/Ice Sheet; Gravimeter; Gravity; Lake Vostok; Potential Field; Solid Earth", "locations": "East Antarctica; Lake Vostok; Antarctica", "north": -75.5, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Earth Sciences", "persons": "Studinger, Michael S.; Bell, Robin", "project_titles": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR); Understanding the Boundary Conditions of the Lake Vostok Environment: A Site Survey for Future Work\r\n", "projects": [{"proj_uid": "p0010097", "repository": "USAP-DC", "title": "Understanding the Boundary Conditions of the Lake Vostok Environment: A Site Survey for Future Work\r\n"}, {"proj_uid": "p0000125", "repository": "USAP-DC", "title": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.0, "title": "SOAR-Lake Vostok Survey Gravity data", "uid": "601295", "west": 101.5}, {"awards": "9615704 Bell, Robin", "bounds_geometry": ["POLYGON((115 -74,121 -74,127 -74,133 -74,139 -74,145 -74,151 -74,157 -74,163 -74,169 -74,175 -74,175 -74.4,175 -74.8,175 -75.2,175 -75.6,175 -76,175 -76.4,175 -76.8,175 -77.2,175 -77.6,175 -78,169 -78,163 -78,157 -78,151 -78,145 -78,139 -78,133 -78,127 -78,121 -78,115 -78,115 -77.6,115 -77.2,115 -76.8,115 -76.4,115 -76,115 -75.6,115 -75.2,115 -74.8,115 -74.4,115 -74))"], "date_created": "Fri, 24 Apr 2020 00:00:00 GMT", "description": "Free air gravity anomaly data collected along flight tracks of the Wilkes Basin Corridor as part of the Contrasting Architecture and Dynamics in the Transantarctic Mountains project.", "east": 175.0, "geometry": ["POINT(145 -76)"], "keywords": "Aerogeophysics; Airborne Gravity; Airplane; Antarctica; Free Air Gravity; Glaciers/ice Sheet; Glaciers/Ice Sheet; Gravimeter; Gravity; Gravity Data; Potential Field; Solid Earth; Transantarctic Mountains", "locations": "Antarctica; Transantarctic Mountains", "north": -74.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Bell, Robin", "project_titles": "Contrasting Architecture and Dynamics of the Transantarctic Mountains", "projects": [{"proj_uid": "p0010095", "repository": "USAP-DC", "title": "Contrasting Architecture and Dynamics of the Transantarctic Mountains"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "SOAR-WLK Airborne gravity data", "uid": "601293", "west": 115.0}, {"awards": "9615281 Luyendyk, Bruce", "bounds_geometry": ["POLYGON((-175 -76,-171 -76,-167 -76,-163 -76,-159 -76,-155 -76,-151 -76,-147 -76,-143 -76,-139 -76,-135 -76,-135 -76.8,-135 -77.6,-135 -78.4,-135 -79.2,-135 -80,-135 -80.8,-135 -81.6,-135 -82.4,-135 -83.2,-135 -84,-139 -84,-143 -84,-147 -84,-151 -84,-155 -84,-159 -84,-163 -84,-167 -84,-171 -84,-175 -84,-175 -83.2,-175 -82.4,-175 -81.6,-175 -80.8,-175 -80,-175 -79.2,-175 -78.4,-175 -77.6,-175 -76.8,-175 -76))"], "date_created": "Fri, 24 Apr 2020 00:00:00 GMT", "description": "Free air gravity anomaly data collected along flight tracks of the Western Marie Byrd Land and Ross Sea Boundary", "east": -135.0, "geometry": ["POINT(-155 -80)"], "keywords": "Aerogeophysics; Airborne Gravity; Airplane; Antarctica; Free Air Gravity; Glaciers/ice Sheet; Glaciers/Ice Sheet; Gravimeter; Gravity; Gravity Data; Marie Byrd Land; Potential Field; Ross Sea; Solid Earth", "locations": "Antarctica; Ross Sea; Marie Byrd Land", "north": -76.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Bell, Robin", "project_titles": "Air-Ground Study of Tectonics at the Boundary Between the Eastern Ross Embayment and Western Marie Byrd Land, Antarctica: Basement Geology and Structure", "projects": [{"proj_uid": "p0010096", "repository": "USAP-DC", "title": "Air-Ground Study of Tectonics at the Boundary Between the Eastern Ross Embayment and Western Marie Byrd Land, Antarctica: Basement Geology and Structure"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -84.0, "title": "SOAR-WMB Airborne gravity data", "uid": "601294", "west": -175.0}, {"awards": "9615704 Bell, Robin", "bounds_geometry": ["POLYGON((-180 -84,-176 -84,-172 -84,-168 -84,-164 -84,-160 -84,-156 -84,-152 -84,-148 -84,-144 -84,-140 -84,-140 -84.6,-140 -85.2,-140 -85.8,-140 -86.4,-140 -87,-140 -87.6,-140 -88.2,-140 -88.8,-140 -89.4,-140 -90,-144 -90,-148 -90,-152 -90,-156 -90,-160 -90,-164 -90,-168 -90,-172 -90,-176 -90,180 -90,179.5 -90,179 -90,178.5 -90,178 -90,177.5 -90,177 -90,176.5 -90,176 -90,175.5 -90,175 -90,175 -89.4,175 -88.8,175 -88.2,175 -87.6,175 -87,175 -86.4,175 -85.8,175 -85.2,175 -84.6,175 -84,175.5 -84,176 -84,176.5 -84,177 -84,177.5 -84,178 -84,178.5 -84,179 -84,179.5 -84,-180 -84))"], "date_created": "Fri, 24 Apr 2020 00:00:00 GMT", "description": "Free air gravity anomaly data collected along flight tracks of the Pensacola-Pole Transect as part of the Contrasting Architecture and Dynamics in the Transantarctic Mountains project.", "east": -140.0, "geometry": ["POINT(-162.5 -87)"], "keywords": "Aerogeophysics; Airborne Gravity; Airplane; Antarctica; Free Air Gravity; Glaciers/ice Sheet; Glaciers/Ice Sheet; Gravimeter; Gravity; Gravity Data; Potential Field; Solid Earth; Transantarctic Mountains", "locations": "Antarctica; Transantarctic Mountains", "north": -84.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Bell, Robin", "project_titles": "Contrasting Architecture and Dynamics of the Transantarctic Mountains", "projects": [{"proj_uid": "p0010095", "repository": "USAP-DC", "title": "Contrasting Architecture and Dynamics of the Transantarctic Mountains"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "SOAR-PPT Airborne gravity data", "uid": "601292", "west": 175.0}, {"awards": "9319854 Bell, Robin", "bounds_geometry": ["POLYGON((-155 -77.5,-150 -77.5,-145 -77.5,-140 -77.5,-135 -77.5,-130 -77.5,-125 -77.5,-120 -77.5,-115 -77.5,-110 -77.5,-105 -77.5,-105 -78.2,-105 -78.9,-105 -79.6,-105 -80.3,-105 -81,-105 -81.7,-105 -82.4,-105 -83.1,-105 -83.8,-105 -84.5,-110 -84.5,-115 -84.5,-120 -84.5,-125 -84.5,-130 -84.5,-135 -84.5,-140 -84.5,-145 -84.5,-150 -84.5,-155 -84.5,-155 -83.8,-155 -83.1,-155 -82.4,-155 -81.7,-155 -81,-155 -80.3,-155 -79.6,-155 -78.9,-155 -78.2,-155 -77.5))"], "date_created": "Fri, 24 Apr 2020 00:00:00 GMT", "description": "Free air gravity anomaly data collected as part of the Corridor Aerogeophysics of Eastern Ross Transect Zone CASERTZ/WAIS project.", "east": -105.0, "geometry": ["POINT(-130 -81)"], "keywords": "Aerogeophysics; Airborne Gravity; Airplane; Antarctica; Free Air Gravity; Glaciers/ice Sheet; Glaciers/Ice Sheet; Gravimeter; Gravity; Gravity Data; Marie Byrd Land; Potential Field; Solid Earth; WAIS", "locations": "Marie Byrd Land; WAIS; Antarctica", "north": -77.5, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Bell, Robin; Arko, Robert A.", "project_titles": "Collaborative Research: Lithospheric Controls on the Behavior of the West Antarctic Ice Sheet: Corridor Aerogeophysics of Eastern Ross Transect Zone", "projects": [{"proj_uid": "p0010094", "repository": "USAP-DC", "title": "Collaborative Research: Lithospheric Controls on the Behavior of the West Antarctic Ice Sheet: Corridor Aerogeophysics of Eastern Ross Transect Zone"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -84.5, "title": "SOAR-WAZ Airborne gravity data for the CASERTZ/WAIS project", "uid": "601291", "west": -155.0}, {"awards": "9319854 Bell, Robin", "bounds_geometry": ["POLYGON((-155 -77.5,-150 -77.5,-145 -77.5,-140 -77.5,-135 -77.5,-130 -77.5,-125 -77.5,-120 -77.5,-115 -77.5,-110 -77.5,-105 -77.5,-105 -78.2,-105 -78.9,-105 -79.6,-105 -80.3,-105 -81,-105 -81.7,-105 -82.4,-105 -83.1,-105 -83.8,-105 -84.5,-110 -84.5,-115 -84.5,-120 -84.5,-125 -84.5,-130 -84.5,-135 -84.5,-140 -84.5,-145 -84.5,-150 -84.5,-155 -84.5,-155 -83.8,-155 -83.1,-155 -82.4,-155 -81.7,-155 -81,-155 -80.3,-155 -79.6,-155 -78.9,-155 -78.2,-155 -77.5))"], "date_created": "Fri, 24 Apr 2020 00:00:00 GMT", "description": "Free air gravity anomaly data collected as part of the Corridor Aerogeophysics of Eastern Ross Transect Zone CASERTZ/WAIS project. 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CNES (France) data sources provided by Dr. Richard Biancale. These data files are of Text File format and include Gravity Free Air Anomaly data and were processed after data collection. 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These data files are of Text File (ASCII) format and include Gravity Free Air Anomaly data and were processed after data collection.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "ADGRAV; Antarctica; Geology/Geophysics - Other; Gravimeter; Gravity; PMGRE Il-38", "locations": "Antarctica; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Andrianov, Sergei; Bell, Robin", "project_titles": "The Development of a New Generation Gravity Map of Antarctica", "projects": [{"proj_uid": "p0010092", "repository": "USAP-DC", "title": "The Development of a New Generation Gravity Map of Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Russian processed Gravimeter data from the Antarctica assembled as part of the ADGRAV Data Compilation (1990)", "uid": "601280", "west": -180.0}, {"awards": "9725374 Bell, Robin", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Fri, 17 Apr 2020 00:00:00 GMT", "description": "This data set was acquired with a ship-based Gravimeter assembled as part of the 1990 ADGRAV data compilation (Chief Scientist: Dr. Robin Bell; Investigator(s): Dr. Detlef Damaske). These data files are of Text File (ASCII) format and include Gravity Free Air Anomaly data and were processed after data collection.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "ADGRAV; Antarctica; Geology/Geophysics - Other; Gravimeter; Gravity; Marine Geoscience; Ship", "locations": "Antarctica; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Damaske, Detlef; Bell, Robin", "project_titles": "The Development of a New Generation Gravity Map of Antarctica", "projects": [{"proj_uid": "p0010092", "repository": "USAP-DC", "title": "The Development of a New Generation Gravity Map of Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "BGR processed Gravimeter data from the Antarctica assembled as part of the ADGRAV Data Compilation (1990)", "uid": "601281", "west": -180.0}, {"awards": "9725374 Bell, Robin", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Fri, 17 Apr 2020 00:00:00 GMT", "description": "This data set was acquired with a ship-based Gravimeter assembled as part of the 1990 ADGRAV data compilation (Chief Scientist: Dr. Robin Bell; Investigator(s): Dr. Yasufumi Nogi). These data files are of Text File (ASCII) format and include Gravity Free Air Anomaly data and were processed after data collection.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "ADGRAV; Antarctica; Geology/Geophysics - Other; Gravimeter; Gravity; Marine Geoscience; Ship", "locations": "Antarctica; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Nogi, Yasufumi; Bell, Robin", "project_titles": "The Development of a New Generation Gravity Map of Antarctica", "projects": [{"proj_uid": "p0010092", "repository": "USAP-DC", "title": "The Development of a New Generation Gravity Map of Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Japanese processed Gravimeter Data from the Antarctica assembled as part of the ADGRAV Data Compilation (1990)", "uid": "601282", "west": -180.0}, {"awards": "1341464 Robinson, Rebecca; 1341432 Brzezinski, Mark", "bounds_geometry": ["POLYGON((-175 -54,-174 -54,-173 -54,-172 -54,-171 -54,-170 -54,-169 -54,-168 -54,-167 -54,-166 -54,-165 -54,-165 -55.3,-165 -56.6,-165 -57.9,-165 -59.2,-165 -60.5,-165 -61.8,-165 -63.1,-165 -64.4,-165 -65.7,-165 -67,-166 -67,-167 -67,-168 -67,-169 -67,-170 -67,-171 -67,-172 -67,-173 -67,-174 -67,-175 -67,-175 -65.7,-175 -64.4,-175 -63.1,-175 -61.8,-175 -60.5,-175 -59.2,-175 -57.9,-175 -56.6,-175 -55.3,-175 -54))"], "date_created": "Thu, 09 Apr 2020 00:00:00 GMT", "description": "This dataset contains profiles of water column particulate organic carbon (POC), total particulate nitrogen (TPN), biogenic silica, and d15N of TPN from McLane pump casts (4 depths/cast).", "east": -165.0, "geometry": ["POINT(-170 -60.5)"], "keywords": "Antarctica; Biogenic Silica; Nitrogen Isotopes; Southern Ocean", "locations": "Antarctica; Southern Ocean", "north": -54.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Robinson, Rebecca; Brzezinski, Mark", "project_titles": "Collaborative Proposal: A Field and Laboratory Examination of the Diatom N and Si Isotope Proxies: Implications for Assessing the Southern Ocean Biological Pump", "projects": [{"proj_uid": "p0010083", "repository": "USAP-DC", "title": "Collaborative Proposal: A Field and Laboratory Examination of the Diatom N and Si Isotope Proxies: Implications for Assessing the Southern Ocean Biological Pump"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -67.0, "title": "Particle composition measurements from along 170\u00b0W between 67-54\u00b0S", "uid": "601276", "west": -175.0}, {"awards": "0231006 DeVries, Arthur; 1142158 Cheng, Chi-Hing", "bounds_geometry": ["POLYGON((163 -76.5,163.5 -76.5,164 -76.5,164.5 -76.5,165 -76.5,165.5 -76.5,166 -76.5,166.5 -76.5,167 -76.5,167.5 -76.5,168 -76.5,168 -76.63,168 -76.76,168 -76.89,168 -77.02,168 -77.15,168 -77.28,168 -77.41,168 -77.54,168 -77.67,168 -77.8,167.5 -77.8,167 -77.8,166.5 -77.8,166 -77.8,165.5 -77.8,165 -77.8,164.5 -77.8,164 -77.8,163.5 -77.8,163 -77.8,163 -77.67,163 -77.54,163 -77.41,163 -77.28,163 -77.15,163 -77.02,163 -76.89,163 -76.76,163 -76.63,163 -76.5))"], "date_created": "Wed, 08 Apr 2020 00:00:00 GMT", "description": "Benthic seawater temperature (within 10cm of the bottom) from near the McMurdo Station, Ross Island, Antarctica saltwater intake jetty. Data collected at two nearby locations: On muddy bottom at base of artificial rock jetty (~25m depth), and ~50m west of the Jetty in sponge/spicule mat habitat (~40m depth).", "east": 168.0, "geometry": ["POINT(165.5 -77.15)"], "keywords": "Antarctica; Benthic; McMurdo Sound; Mcmurdo Station; Oceans; Physical Oceanography; Temperature Probe; Water Temperature", "locations": "Antarctica; McMurdo Sound", "north": -76.5, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "Cheng, Chi-Hing; Cziko, Paul; Devries, Arthur", "project_titles": "Antarctic Notothenioid Fish Freeze Avoidance and Genome-wide Evolution for Life in the Cold", "projects": [{"proj_uid": "p0010091", "repository": "USAP-DC", "title": "Antarctic Notothenioid Fish Freeze Avoidance and Genome-wide Evolution for Life in the Cold"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.8, "title": "High-resolution benthic seawater temperature record 1999-2012 (25-40m depth) from near intake jetty at McMurdo Station, Antarctica", "uid": "601275", "west": 163.0}, {"awards": "1443470 Aydin, Murat", "bounds_geometry": ["POINT(-98.16 -89.99)"], "date_created": "Wed, 01 Apr 2020 00:00:00 GMT", "description": "The data file includes the results of the carbonyl sulfide (COS), methyl chloride (CH3Cl), and methyl bromide (CH3Br) measurements from the SPC14 ice core drilled at the South Pole as part of the SPICEcore project. There are a total of 425 measurements. The file is an Excel worksheet saved in .xlsx format. The are seven columns: depth (m), COS (ppt), err (ppt), CH3Cl (ppt), err (ppt), CH3Br (ppt), err (ppt). The depth column is the mid-depth of the samples calculated from top and bottom depth measurements conducted during the CPL. All measurements are reported as dry molar mixing ratios in parts per trillion (ppt). The err column after the data for each compound is the plus/minus 1 sigma uncertainty estimate in ppt\u2019s and it is the cumulative uncertainty based on the precision of the analytical measurement plus the uncertainty that arises from the variability in the background (blank) trace gas levels in the ice core extraction system. The background trace gas levels in the ice core gas extraction and the analytical systems are determined by regularly conducting nitrogen (N2) blanks. Please refer to Aydin et al. [JGR doi:10.1029/2006JD008027, 2007] for details of the measurement methods and the calibration practices. A few instances of missing data are denoted by -999. Contact with the PI encouraged before data usage.", "east": -98.16, "geometry": ["POINT(-98.16 -89.99)"], "keywords": "Antarctica", "locations": "Antarctica; Antarctica", "north": -89.99, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Aydin, Murat", "project_titles": "Carbonyl Sulfide, Methyl Chloride, and Methyl Bromide Measurements in the New Intermediate-depth South Pole Ice Core", "projects": [{"proj_uid": "p0010089", "repository": "USAP-DC", "title": "Carbonyl Sulfide, Methyl Chloride, and Methyl Bromide Measurements in the New Intermediate-depth South Pole Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -89.99, "title": "SPC14 carbonyl sulfide, methyl chloride, and methyl bromide measurements from South Pole, Antarctica", "uid": "601270", "west": -98.16}, {"awards": "1341432 Brzezinski, Mark; 1341464 Robinson, Rebecca", "bounds_geometry": ["POLYGON((-175 -54,-174 -54,-173 -54,-172 -54,-171 -54,-170 -54,-169 -54,-168 -54,-167 -54,-166 -54,-165 -54,-165 -55.3,-165 -56.6,-165 -57.9,-165 -59.2,-165 -60.5,-165 -61.8,-165 -63.1,-165 -64.4,-165 -65.7,-165 -67,-166 -67,-167 -67,-168 -67,-169 -67,-170 -67,-171 -67,-172 -67,-173 -67,-174 -67,-175 -67,-175 -65.7,-175 -64.4,-175 -63.1,-175 -61.8,-175 -60.5,-175 -59.2,-175 -57.9,-175 -56.6,-175 -55.3,-175 -54))"], "date_created": "Tue, 31 Mar 2020 00:00:00 GMT", "description": "This dataset contains the water column profiles of dissolved nutrients, NO3, PO4, dissolved Si, biogenic Si, lithogenic Si, chlorophyll and phaeophytin concentrations, and the d15NO3.", "east": -165.0, "geometry": ["POINT(-170 -60.5)"], "keywords": "Antarctica; Chlorophyll; Southern Ocean", "locations": "Southern Ocean; Antarctica", "north": -54.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Robinson, Rebecca; Brzezinski, Mark", "project_titles": "Collaborative Proposal: A Field and Laboratory Examination of the Diatom N and Si Isotope Proxies: Implications for Assessing the Southern Ocean Biological Pump", "projects": [{"proj_uid": "p0010083", "repository": "USAP-DC", "title": "Collaborative Proposal: A Field and Laboratory Examination of the Diatom N and Si Isotope Proxies: Implications for Assessing the Southern Ocean Biological Pump"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -67.0, "title": "Dissolved nutrient profiles from along 170\u00b0W between 67 and 54\u00b0S", "uid": "601269", "west": -175.0}, {"awards": "1443471 Koutnik, Michelle", "bounds_geometry": ["POINT(-98.16 -89.99)"], "date_created": "Wed, 25 Mar 2020 00:00:00 GMT", "description": "The South Pole Ice Core (SPICEcore), which spans the past 54,300 years, was drilled far from an ice divide such that ice recovered at depth originated upstream of the core site. If the climate is different upstream, the climate history recovered from the core will be a combination of the upstream conditions advected to the core site and temporal changes. Here, we evaluate the impact of ice advection on two fundamental records from SPICEcore: accumulation rate and water isotopes. We determined past locations of ice deposition based on GPS measurements of the modern velocity field spanning 100 km upstream, where ice of ~20 ka age would likely have originated. Beyond 100 km, there are no velocity measurements, but ice likely originates from Titan Dome, an additional 90 km distant. Shallow radar measurements extending 100 km upstream from the core site reveal large (~20%) variations in accumulation but no significant trend. Water isotope ratios, measured at 12.5 km intervals for the first 100 km of the flowline, show a decrease with elevation of -0.008\u2030 m-1 for \u03b418O. Advection adds approximately 1\u2030 for \u03b418O to the LGM-to-modern change. We also use an existing ensemble of continental ice-sheet model runs to assess the ice sheet elevation change through time. The magnitude of elevation change is likely small and the sign uncertain. Assuming a lapse rate of 10\u00b0C per km of elevation, the inference of LGM-to-modern temperature change is ~1.4\u00b0C smaller than if the flow from upstream is not considered. ", "east": -98.16, "geometry": ["POINT(-98.16 -89.99)"], "keywords": "Antarctica; Ice Core Data; South Pole; SPICEcore", "locations": "South Pole; Antarctica", "north": -89.99, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Fudge, T. J.", "project_titles": "Collaborative Research: Characterization of Upstream Ice and Firn Dynamics affecting the South Pole Ice Core", "projects": [{"proj_uid": "p0000200", "repository": "USAP-DC", "title": "Collaborative Research: Characterization of Upstream Ice and Firn Dynamics affecting the South Pole Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -89.99, "title": "SPICEcore Advection", "uid": "601266", "west": -98.16}, {"awards": "1643551 Hansen, Samantha", "bounds_geometry": null, "date_created": "Tue, 10 Mar 2020 00:00:00 GMT", "description": "Dataset includes information on all A- and B-ranked earthquakes (see Hansen et al., 2020) recorded by the Antarctic TAMNNET seismic array that were examined for ULVZ evidence. Information on their attenuation (t*) parameter, signal-to-noise ratio, core-mantle boundary bouncepoint location, and average remainder trace standard deviation are also provided. The provided figure indicates where ULVZ evidence has been found and where possible ULVZ evidence may be indicated.", "east": null, "geometry": null, "keywords": "Antarctica; Core-Mantle Boundary; ScP; Southern Hemisphere; Ultra-Low Velocity Zones", "locations": "Antarctica; Antarctica; Southern Hemisphere", "north": null, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Hansen, Samantha; Carson, Sarah; Garnero, Edward; Yu, Shule; Rost, Sebastian", "project_titles": "Collaborative Research: Antarctic Seismic Investigations of ULVZ Structure", "projects": [{"proj_uid": "p0010136", "repository": "USAP-DC", "title": "Collaborative Research: Antarctic Seismic Investigations of ULVZ Structure"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Investigating Ultra-low Velocity Zones (ULVZs) using an Antarctic Dataset", "uid": "601265", "west": null}, {"awards": "1826712 McMahon, Kelton; 1443585 Polito, Michael; 1443424 McMahon, Kelton; 1443386 Emslie, Steven", "bounds_geometry": ["POLYGON((162 -72,162.9 -72,163.8 -72,164.7 -72,165.6 -72,166.5 -72,167.4 -72,168.3 -72,169.2 -72,170.1 -72,171 -72,171 -72.6,171 -73.2,171 -73.8,171 -74.4,171 -75,171 -75.6,171 -76.2,171 -76.8,171 -77.4,171 -78,170.1 -78,169.2 -78,168.3 -78,167.4 -78,166.5 -78,165.6 -78,164.7 -78,163.8 -78,162.9 -78,162 -78,162 -77.4,162 -76.8,162 -76.2,162 -75.6,162 -75,162 -74.4,162 -73.8,162 -73.2,162 -72.6,162 -72))"], "date_created": "Tue, 03 Mar 2020 00:00:00 GMT", "description": "This data set contains measurements of carbon (\u03b413C) and nitrogen (\u03b415N) stable isotope values of feather, skin, bone, and toenail samples of mummified Ad\u00e9lie penguin chick remains excavated from multiple sites around the Ross Sea region of Antarctica between 2004 and 2016, as well as the same measurements for modern Ad\u00e9lie chicks collected from the surface of Cape Hallett and Adelie Cove in January 2016. Stable isotope analyses were conducted using an elemental analyzer coupled to a continuous flow stable isotope ratio mass spectrometer. Where possible, accelerator Mass Spectrometry (AMS) radiocarbon dates on selected mummy tissues were completed at the Rafter Radiocarbon Laboratory, New Zealand (NZA), Beta Analytic, Inc. (Beta), the University of Georgia Center for Applied Isotope Studies (UGAMS), and Woods Hole National Ocean Sciences Accelerator Mass Spectrometry (NOSAMS) facility. All dates were corrected for the marine carbon reservoir effect and calibrated to calendar years before present (cal years BP) using a \u0394R of 750\u2009\u00b1\u200950 years and the MARINE13 calibration curve in Calib 7.0 (2\u03c3 range). \r\nThe data set also includes excavation/collection site names and latitude/longitude, date of excavation/collection, tissue used for radiocarbon dating, and carbon to nitrogen ratios. Details of the data set and all relevant methods are provided in Kristan et. al., 2019.\r\n", "east": 171.0, "geometry": ["POINT(166.5 -75)"], "keywords": "Abandoned Colonies; Antarctica; Holocene; Penguin; Ross Sea; Stable Isotope Analysis", "locations": "Antarctica; Ross Sea; Antarctica", "north": -72.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "Kristan, Allyson; Patterson, William; Emslie, Steven D.", "project_titles": "Collaborative Research: Investigating Holocene Shifts in the Diets and Paleohistory of Antarctic Krill Predators", "projects": [{"proj_uid": "p0010047", "repository": "USAP-DC", "title": "Collaborative Research: Investigating Holocene Shifts in the Diets and Paleohistory of Antarctic Krill Predators"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Radioisotope dates and carbon (\u03b413C) and nitrogen (\u03b415N) stable isotope values from modern and mummified Ad\u00e9lie Penguin chick carcasses and tissue from the Ross Sea, Antarctica", "uid": "601263", "west": 162.0}, {"awards": "1245659 Petrenko, Vasilii", "bounds_geometry": ["POINT(161.71353 -77.75855)"], "date_created": "Fri, 28 Feb 2020 00:00:00 GMT", "description": "This data set contains measurements of 14CH4 and 14CO in ice cores from Taylor Glacier, Antarctica. This includes measurements in ice from the last deglaciation (18 - 8 kyr), for the purposes of paleoatmospheric 14CH4 reconstruction. The data set also includes measurements in older ice (50 - 70 kyr) from a deep ice core, made for the purposes of studying in situ cosmogenic 14C production in ice. All data are in excel format.", "east": 161.71353, "geometry": ["POINT(161.71353 -77.75855)"], "keywords": "Antarctica; Carbon-14; Cosmogenic; Ice Core; Methane", "locations": "Antarctica", "north": -77.75855, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Petrenko, Vasilii; Dyonisius, Michael", "project_titles": "Collaborative Research: The Taylor Glacier, Antarctica, Horizontal Ice Core: Exploring changes in the Natural Methane Budget in a Warming World and Expanding the Paleo-archive", "projects": [{"proj_uid": "p0000283", "repository": "USAP-DC", "title": "Collaborative Research: The Taylor Glacier, Antarctica, Horizontal Ice Core: Exploring changes in the Natural Methane Budget in a Warming World and Expanding the Paleo-archive"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Taylor Dome Ice Core", "south": -77.75855, "title": "Measurements of 14CH4 and 14CO in ice from Taylor Glacier: Last Deglaciation and Deep Core Results", "uid": "601260", "west": 161.71353}, {"awards": "1543256 Shuster, David", "bounds_geometry": ["POLYGON((-66.80688 -67.420674,-66.732895 -67.420674,-66.65891 -67.420674,-66.584925 -67.420674,-66.51094 -67.420674,-66.436955 -67.420674,-66.36297 -67.420674,-66.288985 -67.420674,-66.215 -67.420674,-66.141015 -67.420674,-66.06703 -67.420674,-66.06703 -67.4542151,-66.06703 -67.4877562,-66.06703 -67.5212973,-66.06703 -67.5548384,-66.06703 -67.5883795,-66.06703 -67.6219206,-66.06703 -67.6554617,-66.06703 -67.6890028,-66.06703 -67.7225439,-66.06703 -67.756085,-66.141015 -67.756085,-66.215 -67.756085,-66.288985 -67.756085,-66.36297 -67.756085,-66.436955 -67.756085,-66.51094 -67.756085,-66.584925 -67.756085,-66.65891 -67.756085,-66.732895 -67.756085,-66.80688 -67.756085,-66.80688 -67.7225439,-66.80688 -67.6890028,-66.80688 -67.6554617,-66.80688 -67.6219206,-66.80688 -67.5883795,-66.80688 -67.5548384,-66.80688 -67.5212973,-66.80688 -67.4877562,-66.80688 -67.4542151,-66.80688 -67.420674))"], "date_created": "Thu, 27 Feb 2020 00:00:00 GMT", "description": "This dataset contains 80 detrital and 2 bedrock apatite (U-Th)/He thermochronometric ages from Bourgeois Fjord. Data was collected to constrain timing and patterns of topographic change at Bourgeois Fjord on Ma timescales. Analyses were conducted at the Berkeley Geochronology Center and presented in Microsoft Excel formats.", "east": -66.06703, "geometry": ["POINT(-66.436955 -67.5883795)"], "keywords": "Antarctica; Antarctic Peninsula", "locations": "Antarctic Peninsula; Antarctica", "north": -67.420674, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Clinger, Anna", "project_titles": "Antarctic Peninsula Exhumation and Landscape Development Investigated by Low-Temperature Detrital Thermochronometry", "projects": [{"proj_uid": "p0000876", "repository": "USAP-DC", "title": "Antarctic Peninsula Exhumation and Landscape Development Investigated by Low-Temperature Detrital Thermochronometry"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -67.756085, "title": "Detrital low-temperature thermochronometry from Bourgeois Fjord, AP", "uid": "601259", "west": -66.80688}, {"awards": "1341494 Gao, Yuan", "bounds_geometry": ["POINT(-64.05 -64.766)"], "date_created": "Thu, 20 Feb 2020 00:00:00 GMT", "description": "The dataset includes the particle size measurements of aerosol iron (Fe) through sampling of size-segregated aerosol particles made at Palmer Station, Antarctic Peninsula, which took place in the austral summer of 2016-2017. New results include particle-size distributions of total Fe, labile Fe, and fractional Fe solubility in aerosols from these samples.", "east": -64.05, "geometry": ["POINT(-64.05 -64.766)"], "keywords": "Aerosol Concentration; Antarctica; Chemistry:gas; Chemistry:Gas; Iron; Palmer Station; Particle Size", "locations": "Palmer Station; Antarctica", "north": -64.766, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Gao, Yuan", "project_titles": "Quantifying Atmospheric Iron Properties over West Antarctic Peninsula", "projects": [{"proj_uid": "p0010082", "repository": "USAP-DC", "title": "Quantifying Atmospheric Iron Properties over West Antarctic Peninsula"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.766, "title": "Particle sizes of aerosol iron", "uid": "601257", "west": -64.05}, {"awards": "1443677 Padman, Laurence", "bounds_geometry": ["POLYGON((-180 -68,-175.85 -68,-171.7 -68,-167.55 -68,-163.4 -68,-159.25 -68,-155.1 -68,-150.95 -68,-146.8 -68,-142.65 -68,-138.5 -68,-138.5 -69.7,-138.5 -71.4,-138.5 -73.1,-138.5 -74.8,-138.5 -76.5,-138.5 -78.2,-138.5 -79.9,-138.5 -81.6,-138.5 -83.3,-138.5 -85,-142.65 -85,-146.8 -85,-150.95 -85,-155.1 -85,-159.25 -85,-163.4 -85,-167.55 -85,-171.7 -85,-175.85 -85,180 -85,177.4 -85,174.8 -85,172.2 -85,169.6 -85,167 -85,164.4 -85,161.8 -85,159.2 -85,156.6 -85,154 -85,154 -83.3,154 -81.6,154 -79.9,154 -78.2,154 -76.5,154 -74.8,154 -73.1,154 -71.4,154 -69.7,154 -68,156.6 -68,159.2 -68,161.8 -68,164.4 -68,167 -68,169.6 -68,172.2 -68,174.8 -68,177.4 -68,-180 -68))"], "date_created": "Fri, 14 Feb 2020 00:00:00 GMT", "description": "This dataset contains a regional ocean-ice shelf model used to support and interpret the ROSETTA-Ice field program. A gzipped tar file containing the regional ROMS model code, configuration files, input files, and selected output files. The model simulation covers three years following a ten year spin up. Two sets of output files from the simulation are included. The first is the complete model output (T,S,u,v, etc.) averaged over 30 day intervals. The second is selected variable (T, S, and passive dye tracers) averaged over one day. Included Matlab scripts process these daily passive dye files into water masses and make a simple movie of the time evolution of the water mass distributions. For futher information, see the Supplemental Information of the associated publication (Tinto et al., 2019).\r\n\r\n", "east": 154.0, "geometry": ["POINT(-172.25 -76.5)"], "keywords": "Antarctica; Basal Melt; Ice Shelf; Model Output; Ocean Circulation Model; Ross Ice Shelf; Ross Sea", "locations": "Antarctica; Ross Ice Shelf; Ross Sea; Ross Sea", "north": -68.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Springer, Scott; Howard, Susan L.; Padman, Laurence", "project_titles": "Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE)", "projects": [{"proj_uid": "p0010035", "repository": "USAP-DC", "title": "Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -85.0, "title": "Ross Sea ocean model simulation used to support ROSETTA-Ice ", "uid": "601255", "west": -138.5}, {"awards": "1644020 Sims, Kenneth W.; 1644013 Gaetani, Glenn; 1644027 Wallace, Paul", "bounds_geometry": null, "date_created": "Sat, 08 Feb 2020 00:00:00 GMT", "description": "", "east": null, "geometry": null, "keywords": "Antarctica; Hut Point Peninsula; Mt. Bird; Mt. Morning; Mt. Terror; Ross Island; Turks Head; Turtle Rock", "locations": "Mt. Morning; Ross Island; Antarctica; Mt. Terror; Hut Point Peninsula; Turtle Rock; Turks Head; Mt. Bird", "north": null, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Earth Sciences; Antarctic Earth Sciences", "persons": "Pamukcu, Ayla; Gaetani, Glenn", "project_titles": "Collaborative Research: Determining Magma Storage Depths and Ascent Rates for the Erebus Volcanic Province, Antarctica Using Diffusive Water Loss from Olivine-hosted Melt Inclusion", "projects": [{"proj_uid": "p0010081", "repository": "USAP-DC", "title": "Collaborative Research: Determining Magma Storage Depths and Ascent Rates for the Erebus Volcanic Province, Antarctica Using Diffusive Water Loss from Olivine-hosted Melt Inclusion"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Location and Description of Tephra Samples from the Erebus and Discovery Sub-provinces", "uid": "601250", "west": null}, {"awards": "1341680 Sletten, Ronald", "bounds_geometry": ["POLYGON((160.9 -76.7,161.08 -76.7,161.26 -76.7,161.44 -76.7,161.62 -76.7,161.8 -76.7,161.98 -76.7,162.16 -76.7,162.34 -76.7,162.52 -76.7,162.7 -76.7,162.7 -76.79,162.7 -76.88,162.7 -76.97,162.7 -77.06,162.7 -77.15,162.7 -77.24,162.7 -77.33,162.7 -77.42,162.7 -77.51,162.7 -77.6,162.52 -77.6,162.34 -77.6,162.16 -77.6,161.98 -77.6,161.8 -77.6,161.62 -77.6,161.44 -77.6,161.26 -77.6,161.08 -77.6,160.9 -77.6,160.9 -77.51,160.9 -77.42,160.9 -77.33,160.9 -77.24,160.9 -77.15,160.9 -77.06,160.9 -76.97,160.9 -76.88,160.9 -76.79,160.9 -76.7))"], "date_created": "Mon, 27 Jan 2020 00:00:00 GMT", "description": "The dataset contains the cosmogenic nuclide values for Be-10 and Al-26 for a 30-m permafrost cores collected in Beacon Valley.", "east": 162.7, "geometry": ["POINT(161.8 -77.15)"], "keywords": "Aluminum-26; Antarctica; Be-10; Cosmogenic; Dry Valleys; Geochemistry; Permafrost", "locations": "Dry Valleys; Antarctica", "north": -76.7, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Sletten, Ronald S.", "project_titles": "Ancient landscape-active Surfaces: Periglacial Hyperinflation in soils of Beacon Valley, Antarctica", "projects": [{"proj_uid": "p0010068", "repository": "USAP-DC", "title": "Ancient landscape-active Surfaces: Periglacial Hyperinflation in soils of Beacon Valley, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.6, "title": "Chemical and physical characterization of Beacon Valley and Victoria Valley permafrost cores", "uid": "601247", "west": 160.9}, {"awards": "0839059 Powell, Ross", "bounds_geometry": ["POLYGON((-180 -80,-174 -80,-168 -80,-162 -80,-156 -80,-150 -80,-144 -80,-138 -80,-132 -80,-126 -80,-120 -80,-120 -80.5,-120 -81,-120 -81.5,-120 -82,-120 -82.5,-120 -83,-120 -83.5,-120 -84,-120 -84.5,-120 -85,-126 -85,-132 -85,-138 -85,-144 -85,-150 -85,-156 -85,-162 -85,-168 -85,-174 -85,180 -85,180 -85,180 -85,180 -85,180 -85,180 -85,180 -85,180 -85,180 -85,180 -85,180 -85,180 -84.5,180 -84,180 -83.5,180 -83,180 -82.5,180 -82,180 -81.5,180 -81,180 -80.5,180 -80,180 -80,180 -80,180 -80,180 -80,180 -80,180 -80,180 -80,180 -80,180 -80,-180 -80))"], "date_created": "Fri, 17 Jan 2020 00:00:00 GMT", "description": "This data set includes counts of palynomorphs from subglacial and sub-ice shelf tills from beneath the West Antarctic Ice Sheet. In addition to counts the biostratigraphic ranges are presented on separate tabs. ", "east": -120.0, "geometry": ["POINT(-150 -82.5)"], "keywords": "Antarctica; Pollen; West Antarctica; WISSARD", "locations": "Antarctica; West Antarctica; West Antarctica", "north": -80.0, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Coenen, Jason; Baudoin, Patrick; Warny, Sophie; Askin, Rosemary; Scherer, Reed Paul; Casta\u00f1eda, Isla", "project_titles": "Collaborative Research: Integrative Study of Marine Ice Sheet Stability \u0026 Subglacial Life Habitats in W Antarctica - Lake \u0026 Ice Stream Subglacial Access Research Drilling (LISSARD)", "projects": [{"proj_uid": "p0000105", "repository": "USAP-DC", "title": "Collaborative Research: Integrative Study of Marine Ice Sheet Stability \u0026 Subglacial Life Habitats in W Antarctica - Lake \u0026 Ice Stream Subglacial Access Research Drilling (LISSARD)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WISSARD", "south": -85.0, "title": "Paleogene marine and terrestrial development of the West Antarctic Rift System: Palynomorph Data Set", "uid": "601245", "west": 180.0}, {"awards": "1443534 Bell, Robin", "bounds_geometry": ["POLYGON((-180 -77,-177 -77,-174 -77,-171 -77,-168 -77,-165 -77,-162 -77,-159 -77,-156 -77,-153 -77,-150 -77,-150 -77.9,-150 -78.8,-150 -79.7,-150 -80.6,-150 -81.5,-150 -82.4,-150 -83.3,-150 -84.2,-150 -85.1,-150 -86,-153 -86,-156 -86,-159 -86,-162 -86,-165 -86,-168 -86,-171 -86,-174 -86,-177 -86,180 -86,178.1 -86,176.2 -86,174.3 -86,172.4 -86,170.5 -86,168.6 -86,166.7 -86,164.8 -86,162.9 -86,161 -86,161 -85.1,161 -84.2,161 -83.3,161 -82.4,161 -81.5,161 -80.6,161 -79.7,161 -78.8,161 -77.9,161 -77,162.9 -77,164.8 -77,166.7 -77,168.6 -77,170.5 -77,172.4 -77,174.3 -77,176.2 -77,178.1 -77,-180 -77))"], "date_created": "Fri, 10 Jan 2020 00:00:00 GMT", "description": "This dataset was produced for the manuscript \\\"Multi-decadal basal melt rates and structure of the Ross Ice Shelf, Antarctica using airborne ice penetrating radar\\\" by Das et al., 2020 in Journal of Geophysical Research-Earth Surface. It has total ice thickness, thickness of the LMI layer, strain induced thickness change, basal melt rates and the error estimate for basal melt rates.", "east": 161.0, "geometry": ["POINT(-174.5 -81.5)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Penetrating Radar; Ice-Shelf Basal Melting; Radar Echo Sounder; Radar Echo Sounding; Snow/ice; Snow/Ice", "locations": "Antarctica", "north": -77.0, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Das, Indrani; Padman, Laurence; Bell, Robin; Fricker, Helen; Hulbe, Christina; Siddoway, Christine; Dhakal, Tejendra; Frearson, Nicholas; Mosbeux, Cyrille; Cordero, Isabel; Tinto, Kirsty; Siegfried, Matthew", "project_titles": "Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE)", "projects": [{"proj_uid": "p0010035", "repository": "USAP-DC", "title": "Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -86.0, "title": "Basal Melt, Ice thickness and structure of the Ross Ice Shelf using airborne radar data", "uid": "601242", "west": -150.0}, {"awards": "1443680 Smith, Craig", "bounds_geometry": ["POLYGON((-66 -64,-65.6 -64,-65.2 -64,-64.8 -64,-64.4 -64,-64 -64,-63.6 -64,-63.2 -64,-62.8 -64,-62.4 -64,-62 -64,-62 -64.1,-62 -64.2,-62 -64.3,-62 -64.4,-62 -64.5,-62 -64.6,-62 -64.7,-62 -64.8,-62 -64.9,-62 -65,-62.4 -65,-62.8 -65,-63.2 -65,-63.6 -65,-64 -65,-64.4 -65,-64.8 -65,-65.2 -65,-65.6 -65,-66 -65,-66 -64.9,-66 -64.8,-66 -64.7,-66 -64.6,-66 -64.5,-66 -64.4,-66 -64.3,-66 -64.2,-66 -64.1,-66 -64))"], "date_created": "Tue, 31 Dec 2019 00:00:00 GMT", "description": "Sediment macrofaunal data collected by megacore (10-cm diameter sample tubes) along a down-fjord transect from inner Andvord Bay out onto the open continental shelf on the West Antarctic Peninsula. Sediment core samples from 0 - 10 cm depths were fixed in 4% formaldehyde, sieved on a 300 micron seive, and sorted with a dissecting microscope. ", "east": -62.0, "geometry": ["POINT(-64 -64.5)"], "keywords": "Abundance; Andvord Bay; Antarctica; Antarctic Peninsula; Biota; Fjord; LMG1510; Marine Sediments; Oceans; Polychaete; Polychaete Family Richness; R/v Laurence M. Gould; Sediment Core Data; Sediment Macrofauna", "locations": "Antarctica; Andvord Bay; Antarctic Peninsula", "north": -64.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Smith, Craig", "project_titles": "Collaborative Research: Fjord Ecosystem Structure and Function on the West Antarctic Peninsula - Hotspots of Productivity and Biodiversity? (FjordEco)", "projects": [{"proj_uid": "p0010010", "repository": "USAP-DC", "title": "Collaborative Research: Fjord Ecosystem Structure and Function on the West Antarctic Peninsula - Hotspots of Productivity and Biodiversity? (FjordEco)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "FjordEco", "south": -65.0, "title": "Sediment macrofaunal abundance and family richness from inner Andvord Bay to the open continental shelf", "uid": "601236", "west": -66.0}, {"awards": "0839059 Powell, Ross", "bounds_geometry": ["POLYGON((-180 -80,-174 -80,-168 -80,-162 -80,-156 -80,-150 -80,-144 -80,-138 -80,-132 -80,-126 -80,-120 -80,-120 -80.5,-120 -81,-120 -81.5,-120 -82,-120 -82.5,-120 -83,-120 -83.5,-120 -84,-120 -84.5,-120 -85,-126 -85,-132 -85,-138 -85,-144 -85,-150 -85,-156 -85,-162 -85,-168 -85,-174 -85,180 -85,180 -85,180 -85,180 -85,180 -85,180 -85,180 -85,180 -85,180 -85,180 -85,180 -85,180 -84.5,180 -84,180 -83.5,180 -83,180 -82.5,180 -82,180 -81.5,180 -81,180 -80.5,180 -80,180 -80,180 -80,180 -80,180 -80,180 -80,180 -80,180 -80,180 -80,180 -80,-180 -80))"], "date_created": "Thu, 19 Dec 2019 00:00:00 GMT", "description": "This data set includes biomarker data presented in Paleogene marine and terrestrial development of the West Antarctic Rift System. Included in the alkane sheet are the Terrestrial/aquatic (T/A) n-alkane ratio, total long (C27-C33)- and mid-chain (C23 and C25) n-alkane concentrations in units of ng alkanes per g sediment extracted, and the n-alkane average chain-length (ACL). Included in the glycerol dialkyl glycerol tetraethers (GDGT) sheet are the TEX86 sea surface temperature estimates with multiple calibrations discussed in the text, the MBT\u20195ME mean annual air temperature estimates, the branched and isoprenoid tetraether (BIT) index. ", "east": -120.0, "geometry": ["POINT(-150 -82.5)"], "keywords": "ACL; Antarctica; Biomarker; BIT Index; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Stream; Whillans Ice Stream; WISSARD", "locations": "Antarctica; Whillans Ice Stream", "north": -80.0, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Coenen, Jason; Casta\u00f1eda, Isla; Warny, Sophie; Baudoin, Patrick; Scherer, Reed Paul; Askin, Rosemary", "project_titles": "Collaborative Research: Integrative Study of Marine Ice Sheet Stability \u0026 Subglacial Life Habitats in W Antarctica - Lake \u0026 Ice Stream Subglacial Access Research Drilling (LISSARD)", "projects": [{"proj_uid": "p0000105", "repository": "USAP-DC", "title": "Collaborative Research: Integrative Study of Marine Ice Sheet Stability \u0026 Subglacial Life Habitats in W Antarctica - Lake \u0026 Ice Stream Subglacial Access Research Drilling (LISSARD)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WISSARD", "south": -85.0, "title": "Paleogene marine and terrestrial development of the West Antarctic Rift System: Biomarker Data Set", "uid": "601234", "west": 180.0}, {"awards": "9896041 Padman, Laurence; 1443677 Padman, Laurence", "bounds_geometry": ["POLYGON((-180 -40.231,-144 -40.231,-108 -40.231,-72 -40.231,-36 -40.231,0 -40.231,36 -40.231,72 -40.231,108 -40.231,144 -40.231,180 -40.231,180 -45.2079,180 -50.1848,180 -55.1617,180 -60.1386,180 -65.1155,180 -70.0924,180 -75.0693,180 -80.0462,180 -85.0231,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -85.0231,-180 -80.0462,-180 -75.0693,-180 -70.0924,-180 -65.1155,-180 -60.1386,-180 -55.1617,-180 -50.1848,-180 -45.2079,-180 -40.231))"], "date_created": "Thu, 19 Dec 2019 00:00:00 GMT", "description": "CATS2008 is a regional inverse barotropic tide model for the circum-Antarctic ocean on a 4 km grid. The model domain includes ocean cavities under the floating ice shelves. The coastline is based on the MODIS MOA [Scambos et al., 2007; Remote Sensing of Environment] feature identification files, adjusted to match ICESat-derived grounding lines for the Ross and Filchner-Ronne ice shelves and Interferometric Synthetic Aperture Radar (InSAR) grounding lines. The water depth map for open water is based on the 2007 release update to Smith and Sandwell [1997; Science]. Adjustments to this map have been made in various regions, including the open continental shelf in front of the Larsen-C Ice Shelf which has been blended with GEBCO bathymetry.\r\n\nModel type: Tides only; Inverse (data assimilation); barotropic (no vertical variation of currents). \nGrid: 4-km uniform polar stereographic (centered at 71 degrees S, 70 degrees W) \nConstituents: M2, S2, N2, K2, K1, O1, P1, Q1, Mf, Mm. \nUnits: z (sea surface height; meters); u,v (currents; cm/s); U,V (transports; m2/s). \nCoordinates: Currents (u, v) and depth-integrated transports (U, V) are given as East (u, U) and North (v, V) components. \nCitation: \"\u2026 an update to the inverse model described by Padman et al. [2002].\" \n\nSee CATS2008_README.pdf for further details.\r", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Inverse Modeling; Model Data; Ocean Currents; Sea Surface; Tidal Models; Tides", "locations": "Antarctica; Sea Surface", "north": -40.231, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Howard, Susan L.; Padman, Laurence; Erofeeva, Svetlana", "project_titles": "Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE); Ocean Tides around Antarctica and in the Southern Ocean", "projects": [{"proj_uid": "p0010116", "repository": "USAP-DC", "title": "Ocean Tides around Antarctica and in the Southern Ocean"}, {"proj_uid": "p0010035", "repository": "USAP-DC", "title": "Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "CATS2008: Circum-Antarctic Tidal Simulation version 2008", "uid": "601235", "west": -180.0}, {"awards": "1443585 Polito, Michael; 1826712 McMahon, Kelton; 1443424 McMahon, Kelton; 1443386 Emslie, Steven", "bounds_geometry": ["POLYGON((-63.56 -60.72,-61.664 -60.72,-59.768 -60.72,-57.872 -60.72,-55.976 -60.72,-54.08 -60.72,-52.184 -60.72,-50.288 -60.72,-48.392 -60.72,-46.496 -60.72,-44.6 -60.72,-44.6 -61.106,-44.6 -61.492,-44.6 -61.878,-44.6 -62.264,-44.6 -62.65,-44.6 -63.036,-44.6 -63.422,-44.6 -63.808,-44.6 -64.194,-44.6 -64.58,-46.496 -64.58,-48.392 -64.58,-50.288 -64.58,-52.184 -64.58,-54.08 -64.58,-55.976 -64.58,-57.872 -64.58,-59.768 -64.58,-61.664 -64.58,-63.56 -64.58,-63.56 -64.194,-63.56 -63.808,-63.56 -63.422,-63.56 -63.036,-63.56 -62.65,-63.56 -62.264,-63.56 -61.878,-63.56 -61.492,-63.56 -61.106,-63.56 -60.72))"], "date_created": "Tue, 17 Dec 2019 00:00:00 GMT", "description": "This data set contains measurements of nitrogen (\u03b415N) stable isotope values of twelve individual amino acids from breast feathers of gentoo penguins (Pygoscelis papua) and chinstrap penguins (Pygoscelis antarctica) collected from museum archives between the 1930s and 2010s. Stable isotope analyses were conducted using a gas chromatograph coupled to a continuous flow stable isotope ratio mass spectrometer. The data set also includes trophic positions of penguins calculated from individual amino acid \u03b415N values.\r\nThe data set indexes each individual penguin with species, collection institution, catalog number, sex, locality, latitude, longitude, year of sample collection, nitrogen isotope ratios, and calculated trophic position. Details of the data set and all relevant methods are provided in McMahon et al. 2020 Proc Natl Acad Sci DOI: 10.1073/pnas.1913093116 ", "east": -44.6, "geometry": ["POINT(-54.08 -62.65)"], "keywords": "Amino Acids; Antarctica; Antarctic Peninsula; Biota; Isotope Data; Nitrogen Isotopes; Oceans; Penguin; Southern Ocean; Stable Isotope Analysis", "locations": "Antarctica; Antarctic Peninsula; Southern Ocean; Antarctica", "north": -60.72, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "McMahon, Kelton; Polito, Michael", "project_titles": "Collaborative Research: Investigating Holocene Shifts in the Diets and Paleohistory of Antarctic Krill Predators", "projects": [{"proj_uid": "p0010047", "repository": "USAP-DC", "title": "Collaborative Research: Investigating Holocene Shifts in the Diets and Paleohistory of Antarctic Krill Predators"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.58, "title": "Amino acid nitrogen isotope values of penguins from the Antarctic Peninsula region 1930s to 2010s", "uid": "601232", "west": -63.56}, {"awards": "1443464 Sowers, Todd", "bounds_geometry": ["POINT(0 -90)"], "date_created": "Wed, 11 Dec 2019 00:00:00 GMT", "description": "The total air content in ice core samples are a fundamental indication of the multitude of processes that impact densification of snow in polar regions. In addition, variations in the elevation of the ice sheet directly control the pressure in the bubble close off region and thereby the total gas content. Attempts to remove the physical factors (temperature, accumulation rate, dust content, seasonality) impacting the total air content could provide a means of assessing variations in the elevation of the South Pole over the last 50,000 years.", "east": 0.0, "geometry": ["POINT(0 -90)"], "keywords": "Air Content; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Data; Ice Core Records; Snow/ice; Snow/Ice; South Pole; SPICEcore", "locations": "Antarctica; South Pole", "north": -90.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Sowers, Todd A.", "project_titles": "Collaborative Research: Inert Gas and Methane Based Climate Records throughout the South Pole Deep Ice Core", "projects": [{"proj_uid": "p0010005", "repository": "USAP-DC", "title": "Collaborative Research: Inert Gas and Methane Based Climate Records throughout the South Pole Deep Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -90.0, "title": "South Pole ice core total air content", "uid": "601231", "west": 0.0}, {"awards": "1443464 Sowers, Todd", "bounds_geometry": ["POINT(0 -90)"], "date_created": "Wed, 11 Dec 2019 00:00:00 GMT", "description": "The overiding goal for our collaborative project is to provide the necessary data to construct an accurate gas age scale all along the SPICE core. Downcore measurements of CH4 and other species would help to constrain the ice age - gas age difference all along the core that is a prerequisite for the construction of the gas age vs depth profile that is the backbone for all atmospheric reconstructions. ", "east": 0.0, "geometry": ["POINT(0 -90)"], "keywords": "Antarctica; Atmospheric CH4; Ch4; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core; Ice Core Chemistry; Ice Core Data; Methane; Methane Concentration; Snow/ice; Snow/Ice; South Pole; SPICEcore", "locations": "South Pole; Antarctica", "north": -90.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Sowers, Todd A.", "project_titles": "Collaborative Research: Inert Gas and Methane Based Climate Records throughout the South Pole Deep Ice Core", "projects": [{"proj_uid": "p0010005", "repository": "USAP-DC", "title": "Collaborative Research: Inert Gas and Methane Based Climate Records throughout the South Pole Deep Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -90.0, "title": "South Pole CH4 data for termination", "uid": "601230", "west": 0.0}, {"awards": "1341612 Bowser, Samuel", "bounds_geometry": ["POINT(163.5117 -77.57623)"], "date_created": "Thu, 05 Dec 2019 00:00:00 GMT", "description": "Photographs taken from helo operating at 500 ft of the shoreline bounding Explorers Cove in late January, illustrating typical sea ice conditions, extent of shoreline moat, ephemeral snow melt input, nearshore small ponds and tide pools, Commonwealth and Wales Glacier deltas, evaporite deposits, and landslides along the northern/northeastern slopes of Mount Barnes.", "east": 163.5117, "geometry": ["POINT(163.5117 -77.57623)"], "keywords": "Aerial Imagery; Antarctica; Camera; Delta; Freshwater; Helicopter; Moat; Shoreline Survey; Small Ponds; Snow Melt; Tide Pools", "locations": "Antarctica", "north": -77.57623, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Bowser, Samuel; Alexander, Steve", "project_titles": "Assembling and Mining the Genomes of Giant Antarctic Foraminifera", "projects": [{"proj_uid": "p0000004", "repository": "USAP-DC", "title": "Assembling and Mining the Genomes of Giant Antarctic Foraminifera"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.57623, "title": "Aerial survey of Explorers Cove shoreline, late January 2005", "uid": "601229", "west": 163.5117}, {"awards": "1043700 Harry, Dennis", "bounds_geometry": ["POLYGON((-180 -70,-176.5 -70,-173 -70,-169.5 -70,-166 -70,-162.5 -70,-159 -70,-155.5 -70,-152 -70,-148.5 -70,-145 -70,-145 -71,-145 -72,-145 -73,-145 -74,-145 -75,-145 -76,-145 -77,-145 -78,-145 -79,-145 -80,-148.5 -80,-152 -80,-155.5 -80,-159 -80,-162.5 -80,-166 -80,-169.5 -80,-173 -80,-176.5 -80,180 -80,177.5 -80,175 -80,172.5 -80,170 -80,167.5 -80,165 -80,162.5 -80,160 -80,157.5 -80,155 -80,155 -79,155 -78,155 -77,155 -76,155 -75,155 -74,155 -73,155 -72,155 -71,155 -70,157.5 -70,160 -70,162.5 -70,165 -70,167.5 -70,170 -70,172.5 -70,175 -70,177.5 -70,-180 -70))"], "date_created": "Sun, 24 Nov 2019 00:00:00 GMT", "description": "Interpretation of major post-middle Miocene seismic reflections in the Ross Sea are provided in i) ASCII files containing Line, Trace, X, Y, and TWTT (two-way travel) picks and ii) netcdf grid files of structure and isochore maps in two-way travel time and depth or thickness. Data are in the Antarctic Polar Stereographic projection.", "east": -145.0, "geometry": ["POINT(-175 -75)"], "keywords": "Andrill; Antarctica; Marine Geoscience; Ross Sea; Seismic Interpretation; Seismic Reflection; Stratigraphy; Subsidence; Victoria Land Basin", "locations": "Victoria Land Basin; Ross Sea; Antarctica", "north": -70.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Harry, Dennis L.", "project_titles": "Geodynamic Models of Subsidence and Lithospheric Flexure at the ANDRILL Drill Sites: Implications for Cenozoic Tectonics and Ice Sheet History", "projects": [{"proj_uid": "p0000467", "repository": "USAP-DC", "title": "Geodynamic Models of Subsidence and Lithospheric Flexure at the ANDRILL Drill Sites: Implications for Cenozoic Tectonics and Ice Sheet History"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "ANDRILL", "south": -80.0, "title": "Ross Sea post-middle Miocene seismic interpretation", "uid": "601227", "west": 155.0}, {"awards": "1443346 Stone, John", "bounds_geometry": ["POLYGON((-174 -84.5,-172.4 -84.5,-170.8 -84.5,-169.2 -84.5,-167.6 -84.5,-166 -84.5,-164.4 -84.5,-162.8 -84.5,-161.2 -84.5,-159.6 -84.5,-158 -84.5,-158 -84.63,-158 -84.76,-158 -84.89,-158 -85.02,-158 -85.15,-158 -85.28,-158 -85.41,-158 -85.54,-158 -85.67,-158 -85.8,-159.6 -85.8,-161.2 -85.8,-162.8 -85.8,-164.4 -85.8,-166 -85.8,-167.6 -85.8,-169.2 -85.8,-170.8 -85.8,-172.4 -85.8,-174 -85.8,-174 -85.67,-174 -85.54,-174 -85.41,-174 -85.28,-174 -85.15,-174 -85.02,-174 -84.89,-174 -84.76,-174 -84.63,-174 -84.5))"], "date_created": "Thu, 21 Nov 2019 00:00:00 GMT", "description": "This data set contains measurements of cosmic-ray-produced Be-10 in quartz from glacial erratics and bedrock at sites along and adjacent to Liv Glacier and Amundsen Glacier in the southern Transantarctic Mountains. Samples were collected during the 2016-17 and 2017-18 field seasons working from remote camps along the coast. Locations were determined by hand-held GPS. Elevations are based on barometric altimetry corrected for daily drift and referenced to precise (geodetic) GPS benchmarks established over a range of altitudes at each site. Horizon geometry and the resulting topographic shielding of the cosmic ray flux was determined from vertically-oriented full-sky (fisheye) photographs at each sample location. Samples were processed at the University of Washington Cosmogenic Nuclide Laboratory using established procedures for mineral separation, dissolution, beryllium extraction and purification, described at http://depts.washington.edu/cosmolab/chem.shtml. Beryllium isotope ratios were measured at the Lawrence Livermore Center for Accelerator Mass Spectrometry (LLNL-CAMS) relative to the KNSTD-Be-01-5-4 standard, assuming a standard Be-10/Be-9 ratio of 2.851E-12 (07KNSTD normalization). Data are reported as input for the online CRONUS cosmogenic nuclide calculator (V3, current at the time of submission in November 2019). Exposure ages can be obtained by entering the data into the CRONUS calculator, at: http://hess.ess.washington.edu/math/v3/v3_age_in.html .\r\nData for each sample consists of two lines of input parameters, as follows:\t\t\t\t\t\t\t\t\t\r\n{Sample_name, Latitude (DD), Longitude (DD), Altitude (m asl), Scaling_function, Thickness (cm), Density (g/cm^3), Horizon_correction, Erosion_rate (cm/yr), Year_sampled}\r\n{Sample_name, Nuclide (in this case Be-10), Target_mineral (quartz), Be-10_concentration (atom/g), Error_Be-10_concentration (atom/g), Normalization}\r\nFurther information about the V3 input format is given at:\r\nhttp://hess.ess.washington.edu/math/docs/v3/v3_input_explained.html", "east": -158.0, "geometry": ["POINT(-166 -85.15)"], "keywords": "Antarctica; Be-10; Beryllium-10; Cosmogenic; Cosmogenic Dating; Cosmogenic Radionuclides; Deglaciation; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Liv Glacier; Rocks; Ross Ice Sheet; Surface Exposure Dates; Transantarctic Mountains", "locations": "Liv Glacier; Transantarctic Mountains; Ross Ice Sheet; Antarctica", "north": -84.5, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Stone, John", "project_titles": "Collaborative Research: High-resolution Reconstruction of Holocene Deglaciation in the Southern Ross Embayment", "projects": [{"proj_uid": "p0010053", "repository": "USAP-DC", "title": "Collaborative Research: High-resolution Reconstruction of Holocene Deglaciation in the Southern Ross Embayment"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -85.8, "title": "Cosmogenic nuclide data from glacial deposits along the Liv Glacier coast", "uid": "601226", "west": -174.0}, {"awards": "1644073 DiTullio, Giacomo", "bounds_geometry": ["POLYGON((-180 -72.45,-179.354 -72.45,-178.708 -72.45,-178.062 -72.45,-177.416 -72.45,-176.77 -72.45,-176.124 -72.45,-175.478 -72.45,-174.832 -72.45,-174.186 -72.45,-173.54 -72.45,-173.54 -73.068,-173.54 -73.686,-173.54 -74.304,-173.54 -74.922,-173.54 -75.54,-173.54 -76.158,-173.54 -76.776,-173.54 -77.394,-173.54 -78.012,-173.54 -78.63,-174.186 -78.63,-174.832 -78.63,-175.478 -78.63,-176.124 -78.63,-176.77 -78.63,-177.416 -78.63,-178.062 -78.63,-178.708 -78.63,-179.354 -78.63,180 -78.63,179.818 -78.63,179.636 -78.63,179.454 -78.63,179.272 -78.63,179.09 -78.63,178.908 -78.63,178.726 -78.63,178.544 -78.63,178.362 -78.63,178.18 -78.63,178.18 -78.012,178.18 -77.394,178.18 -76.776,178.18 -76.158,178.18 -75.54,178.18 -74.922,178.18 -74.304,178.18 -73.686,178.18 -73.068,178.18 -72.45,178.362 -72.45,178.544 -72.45,178.726 -72.45,178.908 -72.45,179.09 -72.45,179.272 -72.45,179.454 -72.45,179.636 -72.45,179.818 -72.45,-180 -72.45))"], "date_created": "Wed, 13 Nov 2019 00:00:00 GMT", "description": "Biogenic silica concentrations collected from CTD casts during RVIB Nathaniel B. Palmer cruise in the Ross Sea, Southern Ocean from December 2017-February 2018", "east": -173.54, "geometry": ["POINT(-177.68 -75.54)"], "keywords": "Antarctica; Biogenic Silica; Biogenic Silica Concentrations; Chemistry:Water; Geochemistry; NBP1801; Oceans; Ross Sea; R/v Nathaniel B. Palmer; Sea Water; Southern Ocean; Spectroscopy; Water Measurements; Water Samples", "locations": "Antarctica; Southern Ocean; Ross Sea", "north": -72.45, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Ditullio, Giacomo; Schanke, Nicole", "project_titles": "Collaborative Research: Cobalamin and Iron Co-Limitation Of Phytoplankton Species in Terra Nova Bay", "projects": [{"proj_uid": "p0010045", "repository": "USAP-DC", "title": "Collaborative Research: Cobalamin and Iron Co-Limitation Of Phytoplankton Species in Terra Nova Bay"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.63, "title": "Biogenic silica concentrations from the Ross Sea", "uid": "601225", "west": 178.18}, {"awards": "1043528 Alley, Richard; 0539578 Alley, Richard", "bounds_geometry": ["POINT(-112.3 -79.43333333)"], "date_created": "Tue, 12 Nov 2019 00:00:00 GMT", "description": "This data set includes the fully updated (2017) bubble number-density measured at depths from 120 meters down to 1600 meters at 20-meter intervals in both horizontal and vertical samples. The data set also includes modeled temperature reconstructions based on the model developed by Spencer and others (2006) and Fegyveresi and others (2011). Data also includes tabs for bubble size and shape data.", "east": -112.3, "geometry": ["POINT(-112.3 -79.43333333)"], "keywords": "Antarctic; Antarctica; Bubble Number Density; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice; Ice Core Data; Ice Core Records; NSF-ICF Microtome and Photography Stage; Paleoclimate; Physical Properties; Snow/ice; Snow/Ice; WAIS Divide Ice Core; West Antarctic Ice Sheet", "locations": "West Antarctic Ice Sheet; Antarctica; Antarctic", "north": -79.43333333, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Earth Sciences", "persons": "Fegyveresi, John; Alley, Richard; Spencer, Matthew; Fitzpatrick, Joan; Voigt, Donald E.", "project_titles": "Collaborative Research: Continued Study of Physical Properties of the WAIS Divide Deep Core; Collaborative Research: Physical Properties of the WAIS Divide Deep Core", "projects": [{"proj_uid": "p0000038", "repository": "USAP-DC", "title": "Collaborative Research: Physical Properties of the WAIS Divide Deep Core"}, {"proj_uid": "p0000027", "repository": "USAP-DC", "title": "Collaborative Research: Continued Study of Physical Properties of the WAIS Divide Deep Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.43333333, "title": "Updated (2017) bubble number-density, size, shape, and modeled paleoclimate data", "uid": "601224", "west": -112.3}, {"awards": "1443566 Bay, Ryan", "bounds_geometry": ["POINT(0 -90)"], "date_created": "Sun, 03 Nov 2019 00:00:00 GMT", "description": "We deployed an oriented laser dust logger in the SPICEcore borehole in order to study the particulate stratigraphy, volcanology, glaciology and climatology of South Pole. We obtained a detailed record of dust and ash, SPICEcore age versus depth, and measurements of the optical anisotropy indicated by IceCube analyses.", "east": 0.0, "geometry": ["POINT(0 -90)"], "keywords": "Antarctica; Dust; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice; Ice Core Data; Ice Core Records; Paleoclimate; Snow/ice; Snow/Ice; SPICEcore", "locations": "Antarctica; Antarctica", "north": -90.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Bay, Ryan", "project_titles": "Laser Dust Logging of a South Pole Ice Core", "projects": [{"proj_uid": "p0010061", "repository": "USAP-DC", "title": "Laser Dust Logging of a South Pole Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -90.0, "title": "Laser Dust Logging of the South Pole Ice Core (SPICE)", "uid": "601222", "west": 0.0}, {"awards": "1142646 Twickler, Mark; 1141839 Steig, Eric; 1142517 Aydin, Murat", "bounds_geometry": ["POINT(90 -90)"], "date_created": "Wed, 30 Oct 2019 00:00:00 GMT", "description": "Qualitative assessment of ice-core quality versus depth for the South Pole ice core SPC14. The depths and core quality ratings presented here are from the field observations made at South Pole, Antarctica, during the course of the drilling of the ice core and also from the lab observations at the NSF-Ice Core Facility in Lakewood, Colorado. Depths are in meters. Core quality ratings were defined are as follows. Excellent: 0\u20131 breaks/no fractures; Very Good: 0\u20132 breaks/90% no fractures; Good: 0\u20133 breaks/50% no fractures; Fair: \u003e10 cm without fractures; Poor: \u003e10 cm without through fractures; Very Poor: \u003c10 cm without through fractures.", "east": 90.0, "geometry": ["POINT(90 -90)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice; Ice Core Data; Ice Core Depth; Ice Core Records; Snow/ice; Snow/Ice; SPICEcore", "locations": "Antarctica", "north": -90.0, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology", "persons": "Souney, Joseph Jr.; Twickler, Mark; Fegyveresi, John; Casey, Kimberly A.; Aydin, Murat; Steig, Eric J.; Nunn, Richard; Hargreaves, Geoff; Fudge, T. J.; Nicewonger, Melinda R.; Kahle, Emma", "project_titles": "Collaborative Research: A 1500m Ice Core from South Pole", "projects": [{"proj_uid": "p0010060", "repository": "USAP-DC", "title": "Collaborative Research: A 1500m Ice Core from South Pole"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -90.0, "title": "South Pole Ice Core (SPICEcore) SPC14 Core Quality Versus Depth", "uid": "601221", "west": 90.0}, {"awards": "1443420 Dodd, Justin", "bounds_geometry": ["POINT(167.083333 -77.888889)"], "date_created": "Sun, 27 Oct 2019 00:00:00 GMT", "description": "The Andrill-1B (AND-1B) sediment core from under the Ross Ice Shelf in McMurdo Sound, Antarctica, recovered a mid to late Pliocene (~4.68 to 3.44 Ma) age diatomite unit with d18Odiatom values that range from +32.6 to +37.6 \u2030 (n=50 ", "east": 167.083333, "geometry": ["POINT(167.083333 -77.888889)"], "keywords": "And-1B; Andrill; Antarctica; Chemistry:sediment; Chemistry:Sediment; Delta 18O; Diatom; Mass Spectrometer; Oxygen Isotope; Paleoclimate; Pliocene; Sediment; Wais Project; West Antarctic Ice Sheet", "locations": "Antarctica; West Antarctic Ice Sheet", "north": -77.888889, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Dodd, Justin; Abbott, Tirzah", "project_titles": "Diatom and Oxygen Isotope Evidence of Pliocene Antarctic Ice Sheet Dynamics and Ross Sea Paleoceanography", "projects": [{"proj_uid": "p0010042", "repository": "USAP-DC", "title": "Diatom and Oxygen Isotope Evidence of Pliocene Antarctic Ice Sheet Dynamics and Ross Sea Paleoceanography"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "ANDRILL", "south": -77.888889, "title": "Diatom Oxygen Isotope Evidence of Pliocene (~4.68 to 3.44 Ma) Antarctic Ice Sheet Dynamics and Ross Sea Paleoceanography", "uid": "601220", "west": 167.083333}, {"awards": "1341558 Ji, Rubao", "bounds_geometry": ["POLYGON((-180 -45,-144 -45,-108 -45,-72 -45,-36 -45,0 -45,36 -45,72 -45,108 -45,144 -45,180 -45,180 -48.4,180 -51.8,180 -55.2,180 -58.6,180 -62,180 -65.4,180 -68.8,180 -72.2,180 -75.6,180 -79,144 -79,108 -79,72 -79,36 -79,0 -79,-36 -79,-72 -79,-108 -79,-144 -79,-180 -79,-180 -75.6,-180 -72.2,-180 -68.8,-180 -65.4,-180 -62,-180 -58.6,-180 -55.2,-180 -51.8,-180 -48.4,-180 -45))"], "date_created": "Tue, 22 Oct 2019 00:00:00 GMT", "description": "The dataset includes 1) sea ice concentrations in Antarctic coastal polynyas (1979-2015) and seasonal ice zones (1978-2019); 2) chlorophyll concentrations in Antarctic coastal polynyas (1997-2015) and seasonal ice zones (1997-2019). The sea ice dataset is a tailored product after processing a global-scale sea ice data product managed by National Snow and Ice Data Center. The chlorophyll dataset is a tailored product after processing a global-scale ocean color dataset produced by GLOBCOLOUR, the European Service for Ocean Colour ", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Biota; Chlorophyll; Chlorophyll Concentration; Oceans; Polynya; Sea Ice Concentration; Seasonal Ice Zone; Southern Ocean", "locations": "Antarctica; Southern Ocean", "north": -45.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Ji, Rubao", "project_titles": "Collaborative Research: Phytoplankton Phenology in the Antarctic: Drivers, Patterns, and Implications for the Adelie Penguin", "projects": [{"proj_uid": "p0000001", "repository": "USAP-DC", "title": "Collaborative Research: Phytoplankton Phenology in the Antarctic: Drivers, Patterns, and Implications for the Adelie Penguin"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.0, "title": "Sea ice and chlorophyll concentrations in Antarctic coastal polynyas and seasonal ice zones", "uid": "601219", "west": -180.0}, {"awards": "1246148 Severinghaus, Jeffrey; 1245821 Brook, Edward J.; 1245659 Petrenko, Vasilii", "bounds_geometry": ["POLYGON((123.3 -75.1,127.138 -75.1,130.976 -75.1,134.814 -75.1,138.652 -75.1,142.49 -75.1,146.328 -75.1,150.166 -75.1,154.004 -75.1,157.842 -75.1,161.68 -75.1,161.68 -75.367,161.68 -75.634,161.68 -75.901,161.68 -76.168,161.68 -76.435,161.68 -76.702,161.68 -76.969,161.68 -77.236,161.68 -77.503,161.68 -77.77,157.842 -77.77,154.004 -77.77,150.166 -77.77,146.328 -77.77,142.49 -77.77,138.652 -77.77,134.814 -77.77,130.976 -77.77,127.138 -77.77,123.3 -77.77,123.3 -77.503,123.3 -77.236,123.3 -76.969,123.3 -76.702,123.3 -76.435,123.3 -76.168,123.3 -75.901,123.3 -75.634,123.3 -75.367,123.3 -75.1))"], "date_created": "Fri, 18 Oct 2019 00:00:00 GMT", "description": "Noble gas data from Taylor Glacier and EPICA Dome C (EDC) for mean ocean temperature reconstruction during the Last Interglacial. Also includes trace gas measurements of d18Oatm, CO2, and CH4 from Taylor Glacier from chronology construction. ", "east": 161.68, "geometry": ["POINT(142.49 -76.435)"], "keywords": "Antarctica; Carbon-14; Carbon Dioxide; Chemistry:ice; Chemistry:Ice; CO2; Dome C Ice Core; Epica; Epica Dome C; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice; Ice Core Chemistry; Ice Core Data; Ice Core Gas Records; Ice Core Records; Isotope Data; Last Interglacial; Mass Spectrometer; Mass Spectrometry; Methane; Oxygen; Oxygen Isotope; Paleotemperature; Pleistocene; Snow/ice; Snow/Ice; Taylor Dome Ice Core; Taylor Glacier", "locations": "Epica Dome C; Antarctica; Taylor Glacier", "north": -75.1, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Shackleton, Sarah", "project_titles": "Collaborative Research: The Taylor Glacier, Antarctica, Horizontal Ice Core: Exploring changes in the Natural Methane Budget in a Warming World and Expanding the Paleo-archive", "projects": [{"proj_uid": "p0000283", "repository": "USAP-DC", "title": "Collaborative Research: The Taylor Glacier, Antarctica, Horizontal Ice Core: Exploring changes in the Natural Methane Budget in a Warming World and Expanding the Paleo-archive"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Taylor Dome Ice Core; Dome C Ice Core", "south": -77.77, "title": "Last Interglacial Mean Ocean Temperature", "uid": "601218", "west": 123.3}, {"awards": "0732869 Holland, David; 1739003 Holland, David", "bounds_geometry": ["POLYGON((-100 -75,-99.9 -75,-99.8 -75,-99.7 -75,-99.6 -75,-99.5 -75,-99.4 -75,-99.3 -75,-99.2 -75,-99.1 -75,-99 -75,-99 -75.05,-99 -75.1,-99 -75.15,-99 -75.2,-99 -75.25,-99 -75.3,-99 -75.35,-99 -75.4,-99 -75.45,-99 -75.5,-99.1 -75.5,-99.2 -75.5,-99.3 -75.5,-99.4 -75.5,-99.5 -75.5,-99.6 -75.5,-99.7 -75.5,-99.8 -75.5,-99.9 -75.5,-100 -75.5,-100 -75.45,-100 -75.4,-100 -75.35,-100 -75.3,-100 -75.25,-100 -75.2,-100 -75.15,-100 -75.1,-100 -75.05,-100 -75))"], "date_created": "Tue, 15 Oct 2019 00:00:00 GMT", "description": "Automatic Weather Station, located on Pine Island Glacier. Data set from 2008-2015.", "east": -99.0, "geometry": ["POINT(-99.5 -75.25)"], "keywords": "Antarctica; Atmosphere; Automated Weather Station; Flux; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Meteorology; Pine Island Glacier; Weather Station Data", "locations": "Antarctica; Pine Island Glacier", "north": -75.0, "nsf_funding_programs": null, "persons": "Mojica Moncada, Jhon F.; Holland, David", "project_titles": "Collaborative Research; IPY: Ocean-Ice Interaction in the Amundsen Sea sector of West Antarctica", "projects": [{"proj_uid": "p0000043", "repository": "USAP-DC", "title": "Collaborative Research; IPY: Ocean-Ice Interaction in the Amundsen Sea sector of West Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -75.5, "title": "Automatic Weather Station Pine Island Glacier", "uid": "601216", "west": -100.0}, {"awards": "1341339 Baker, Bill", "bounds_geometry": ["POLYGON((-64.03 -64.254,-64.0286 -64.254,-64.0272 -64.254,-64.0258 -64.254,-64.0244 -64.254,-64.023 -64.254,-64.0216 -64.254,-64.0202 -64.254,-64.0188 -64.254,-64.0174 -64.254,-64.016 -64.254,-64.016 -64.2543,-64.016 -64.2546,-64.016 -64.2549,-64.016 -64.2552,-64.016 -64.2555,-64.016 -64.2558,-64.016 -64.2561,-64.016 -64.2564,-64.016 -64.2567,-64.016 -64.257,-64.0174 -64.257,-64.0188 -64.257,-64.0202 -64.257,-64.0216 -64.257,-64.023 -64.257,-64.0244 -64.257,-64.0258 -64.257,-64.0272 -64.257,-64.0286 -64.257,-64.03 -64.257,-64.03 -64.2567,-64.03 -64.2564,-64.03 -64.2561,-64.03 -64.2558,-64.03 -64.2555,-64.03 -64.2552,-64.03 -64.2549,-64.03 -64.2546,-64.03 -64.2543,-64.03 -64.254))"], "date_created": "Wed, 09 Oct 2019 00:00:00 GMT", "description": "Samples of the red alga Plocamium cartilagineum were collected from the area around Palmer Station, Antarctica, and characterized by gas chromatography for their secondary metabolite content. Patterns in secondary metabolite content were used to establish chemical phenotypes (chemotypes).", "east": -64.016, "geometry": ["POINT(-64.023 -64.2555)"], "keywords": "Algae; Antarctica; Biota; Chemical Ecology; Chemotyping; Halogenated Monoterpenes; Natural Products; Oceans; Palmer Station; Plocamium Cartilagineum; Southern Ocean; Terpenes", "locations": "Palmer Station; Palmer Station; Southern Ocean; Antarctica", "north": -64.254, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Baker, Bill", "project_titles": "Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula - continuing", "projects": [{"proj_uid": "p0010016", "repository": "USAP-DC", "title": "Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula - continuing"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.257, "title": "Plocamium cartilagineum field chemotyping", "uid": "601215", "west": -64.03}, {"awards": "1341728 Stone, John", "bounds_geometry": ["POLYGON((-86.3 -81,-86.17 -81,-86.04 -81,-85.91 -81,-85.78 -81,-85.65 -81,-85.52 -81,-85.39 -81,-85.26 -81,-85.13 -81,-85 -81,-85 -81.03,-85 -81.06,-85 -81.09,-85 -81.12,-85 -81.15,-85 -81.18,-85 -81.21,-85 -81.24,-85 -81.27,-85 -81.3,-85.13 -81.3,-85.26 -81.3,-85.39 -81.3,-85.52 -81.3,-85.65 -81.3,-85.78 -81.3,-85.91 -81.3,-86.04 -81.3,-86.17 -81.3,-86.3 -81.3,-86.3 -81.27,-86.3 -81.24,-86.3 -81.21,-86.3 -81.18,-86.3 -81.15,-86.3 -81.12,-86.3 -81.09,-86.3 -81.06,-86.3 -81.03,-86.3 -81))"], "date_created": "Wed, 09 Oct 2019 00:00:00 GMT", "description": "This data set contains measurements of cosmic-ray-produced Be-10 and Al-26 in quartz from the RB-2 core, recovered from bedrock at a depth of 150 m below the West Antarctic Ice Sheet surface in the Pirrit Hills. The core site is located at latitude S81.09948, longitude W85.15694. Core length is approximately 8 meters. Lithology is A-type granite, similar in composition to bedrock exposed on nearby Harter Nunatak and other mountains in the Pirrit Hills (Lee et al. Geosci. J. 16, 421-433). Samples were processed at the University of Washington Cosmogenic Nuclide Laboratory. Chemical processing and purification methods are described at http://depts.washington.edu/cosmolab/chem.shtml. Beryllium isotope ratios were measured at the Lawrence Livermore Center for Accelerator Mass Spectrometry (LLNL-CAMS) relative to the KNSTD-Be-01-5-4 standard, assuming a standard Be-10/Be-9 ratio of 2.851E-12 (07KNSTD normalization). Aluminum isotope ratios were measured at PRIME Lab, Purdue University, relative to the KNSTD-Al-01-5-2 standard, assuming a standard Al-26/Al-27 ratio of 1.818E-12 (KNSTD normalization). Uncertainties are 1-sigma and include full AMS errors and all known sources of laboratory uncertainty.", "east": -85.0, "geometry": ["POINT(-85.65 -81.15)"], "keywords": "Aluminum-26; Antarctica; Be-10; Bedrock Core; Beryllium-10; Chemistry:rock; Chemistry:Rock; Cosmogenic; Cosmogenic Dating; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Isotope Data; Pirrit Hills; Rocks; Solid Earth; Subglacial Bedrock", "locations": "Pirrit Hills; Antarctica", "north": -81.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Stone, John", "project_titles": "EXPROBE-WAIS: Exposed Rock Beneath the West Antarctic Ice Sheet, A Test for Interglacial Ice Sheet Collapse", "projects": [{"proj_uid": "p0010057", "repository": "USAP-DC", "title": "EXPROBE-WAIS: Exposed Rock Beneath the West Antarctic Ice Sheet, A Test for Interglacial Ice Sheet Collapse"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -81.3, "title": "Pirrit Hills subglacial bedrock core RB-2, cosmogenic Be-10, Al-26 data", "uid": "601214", "west": -86.3}, {"awards": "1745137 Schroeder, Dustin", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Wed, 02 Oct 2019 00:00:00 GMT", "description": "These data accompany the paper \"Antarctic Topographic Realizations and Geostatistical Modeling Used to Map Subglacial Lakes\" (MacKie et al., in review). This dataset contains 100 geostatistically generated subglacial topographic realizations for Antarctica. Data science techniques were used to calculate the probability of the occurrence of radar-detected lakes and altimetry-detected (active) lakes across the continent, using each topographic realization as a parameter. This generated 100 probability maps of the likelihood of radar-detected lake occurrence and 100 probability maps of active lake occurrence. Further statistics were used to generate 100 binary maps showing expected radar-detected lake locations. The ensemble of realizations can be used for uncertainty quantification.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Active Lakes; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Sheet Model; Model Data; Snow/ice; Snow/Ice; Subglacial Lakes; Topography", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "MacKie, Emma; Schroeder, Dustin; Caers, Jef; Scheidt, Celine; Siegfried, Matthew", "project_titles": "CAREER: Cross-Instrument Synthesis of Antarctic Radar Sounding Observations", "projects": [{"proj_uid": "p0010058", "repository": "USAP-DC", "title": "CAREER: Cross-Instrument Synthesis of Antarctic Radar Sounding Observations"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Antarctic topographic and subglacial lake geostatistical simulations", "uid": "601213", "west": -180.0}, {"awards": "1826712 McMahon, Kelton; 1443386 Emslie, Steven; 1443585 Polito, Michael; 1443424 McMahon, Kelton", "bounds_geometry": ["POLYGON((-59 -62,-58.9 -62,-58.8 -62,-58.7 -62,-58.6 -62,-58.5 -62,-58.4 -62,-58.3 -62,-58.2 -62,-58.1 -62,-58 -62,-58 -62.1,-58 -62.2,-58 -62.3,-58 -62.4,-58 -62.5,-58 -62.6,-58 -62.7,-58 -62.8,-58 -62.9,-58 -63,-58.1 -63,-58.2 -63,-58.3 -63,-58.4 -63,-58.5 -63,-58.6 -63,-58.7 -63,-58.8 -63,-58.9 -63,-59 -63,-59 -62.9,-59 -62.8,-59 -62.7,-59 -62.6,-59 -62.5,-59 -62.4,-59 -62.3,-59 -62.2,-59 -62.1,-59 -62))"], "date_created": "Tue, 24 Sep 2019 00:00:00 GMT", "description": "Radiocarbon dates from pygoscelid penguin tissues from ornithogenic soils and beach deposits at Stranger Point, King George (25 de Mayo) Island, Antarctic Peninsula. Uncorrected dates are in radiocarbon years before present (BP); calibrated dates were corrected for the marine carbon reservoir effect (delta R = 700 +/- 50 years) and calibrated with Calib 7.0.4 to provide 2\u03c3 ranges in calendar years BP. All dates except were completed at the Woods Hole National Ocean Sciences Accelerator Mass Spectrometry (NOSAMS) facility and are designated with OS numbers. Localities include ancient penguin breedings sites (mounds, M), active colonies (I9, B3), and a mid-Holocene marine beach deposit (Pingfo 1).", "east": -58.0, "geometry": ["POINT(-58.5 -62.5)"], "keywords": "Abandoned Colonies; Antarctica; Antarctic Peninsula; Beach Deposit; Geochronology; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Holocene; Penguin; Radiocarbon; Radiocarbon Dates; Snow/ice; Snow/Ice; Stranger Point", "locations": "Stranger Point; Antarctic Peninsula; Antarctica", "north": -62.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "Emslie, Steven D.", "project_titles": "Collaborative Research: Investigating Holocene Shifts in the Diets and Paleohistory of Antarctic Krill Predators", "projects": [{"proj_uid": "p0010047", "repository": "USAP-DC", "title": "Collaborative Research: Investigating Holocene Shifts in the Diets and Paleohistory of Antarctic Krill Predators"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -63.0, "title": "Radiocarbon dates from pygoscelid penguin tissues excavated at Stranger Point, King George Island, Antarctic Peninsula", "uid": "601212", "west": -59.0}, {"awards": "0732625 Leventer, Amy; 9714371 Leventer, Amy", "bounds_geometry": ["POLYGON((-64 -63,-63.1 -63,-62.2 -63,-61.3 -63,-60.4 -63,-59.5 -63,-58.6 -63,-57.7 -63,-56.8 -63,-55.9 -63,-55 -63,-55 -63.4,-55 -63.8,-55 -64.2,-55 -64.6,-55 -65,-55 -65.4,-55 -65.8,-55 -66.2,-55 -66.6,-55 -67,-55.9 -67,-56.8 -67,-57.7 -67,-58.6 -67,-59.5 -67,-60.4 -67,-61.3 -67,-62.2 -67,-63.1 -67,-64 -67,-64 -66.6,-64 -66.2,-64 -65.8,-64 -65.4,-64 -65,-64 -64.6,-64 -64.2,-64 -63.8,-64 -63.4,-64 -63))"], "date_created": "Mon, 16 Sep 2019 00:00:00 GMT", "description": "Diatom data from eastern side of Antarctic Peninsula:\r\n\r\nThis file includes quantitative diatom data for surface samples collected on numerous cruises to the eastern side of the Antarctic Peninsula, including NBP0003, NBP0107, LMG0502, NBP0603, and NBP1203. Samples were collected using a variety of tools including Smith-McIntyre Grab, Kasten Core and Jumbo Kasten Core. These data were generated by Amy Leventer (aleventer@colgate.edu) and undergraduate students at Colgate University. All questions regarding the specifics of these data should be directed to Amy Leventer. \r\n\r\nQuantitative diatom slides were prepared according to the settling technique of Scherer (1995). Cover slips were adhered to the slides using Norland Optical Adhesive #61. Slides were observed under Olympus CX31, BX50 and BX60, and Zeiss Primo Star light microscopes, using a 100X oil immersion objective for a total magnification of 1000X. A minimum of 400 valves or 10 transects was counted for each slide, depending on the absolute diatom abundance. Valves were only counted if \u003e50% complete. Diatoms were identified to species level when possible (Crosta et al., 2005; Armand et al., 2005; Cefarelli et al., 2010).\r\n\r\nArmand, L.K., X. Crosta, O. Romero, J. J. Pichon (2005), The biogeography of major diatom taxa in Southern Ocean sediments: 1. Sea ice related species, Paleogeography, Paleoclimatology, Paleoecology, 223, 93-126. \r\n\r\nCefarelli, A.O., M. E. Ferrario, G. O. Almandoz, A. G. Atencio, R. Akselman, M. Vernet (2010), Diversity of the diatom genus Fragilariopsis in the Argentine Sea and Antarctic waters: morphology, distribution and abundance, Polar Biology, 33(2), 1463-1484. \r\n\r\nCrosta, X., O. Romero, L. K. Armand, J. Pichon (2005), The biogeography of major diatom taxa in Southern Ocean sediments: 2. Open ocean related species, Palaeogeography, Palaeoclimatology, Palaeoecology, 223, 66-92. \r\n\r\nScherer, R. P., A new method for the determination of absolute abundance of diatoms and other silt-sized sedimentary particles, J. Paleolimnol., 12, 171\u2013178, 1995.\r\n", "east": -55.0, "geometry": ["POINT(-59.5 -65)"], "keywords": "Antarctica; Antarctic Peninsula; Benthos; Biota; Diatom; Geology/Geophysics - Other; LMG0502; Marine Geoscience; Marine Sediments; Microscope; NBP0003; NBP0107; NBP0603; NBP1203; R/v Nathaniel B. Palmer; Surface Sediment", "locations": "Antarctica; Antarctic Peninsula", "north": -63.0, "nsf_funding_programs": "Antarctic Integrated System Science; Antarctic Ocean and Atmospheric Sciences", "persons": "Leventer, Amy", "project_titles": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans", "projects": [{"proj_uid": "p0000101", "repository": "USAP-DC", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "LARISSA", "south": -67.0, "title": "Easten Antarctic Peninsula Surface Sediment Diatom Data", "uid": "601211", "west": -64.0}, {"awards": "1443585 Polito, Michael; 1826712 McMahon, Kelton; 1443424 McMahon, Kelton; 1443386 Emslie, Steven", "bounds_geometry": ["POLYGON((-63 -60,-62.1 -60,-61.2 -60,-60.3 -60,-59.4 -60,-58.5 -60,-57.6 -60,-56.7 -60,-55.8 -60,-54.9 -60,-54 -60,-54 -60.4,-54 -60.8,-54 -61.2,-54 -61.6,-54 -62,-54 -62.4,-54 -62.8,-54 -63.2,-54 -63.6,-54 -64,-54.9 -64,-55.8 -64,-56.7 -64,-57.6 -64,-58.5 -64,-59.4 -64,-60.3 -64,-61.2 -64,-62.1 -64,-63 -64,-63 -63.6,-63 -63.2,-63 -62.8,-63 -62.4,-63 -62,-63 -61.6,-63 -61.2,-63 -60.8,-63 -60.4,-63 -60))"], "date_created": "Fri, 13 Sep 2019 00:00:00 GMT", "description": "This data set contains measurements of carbon (\u03b413C) and nitrogen (\u03b415N) stable isotope values of whole-body Antarctic krill (Euphausia superba) collected from trawl surveys of waters surrounding the South Shetland Islands and the northern Antarctic Peninsula during the 2006-07 and 2008-90 Austral summers. Stable isotope analyses were conducted using an elemental analyzer coupled to a continuous flow stable isotope ratio mass spectrometer. Individual krill were lipid-extracted prior to analyses. The data set also includes latitude, longitude, month, and year of sample collection, standard length of the krill to the nearest mm, age class, sex, and carbon to nitrogen ratios. Details of the data set and all relevant methods are provided in Polito et al., 2013 and Polito et al., 2019.", "east": -54.0, "geometry": ["POINT(-58.5 -62)"], "keywords": "Antarctica; Antarctic Krill; Antarctic Peninsula; Biota; Carbon Isotopes; Isotope Data; Krill; Nitrogen Isotopes; Oceans; Southern Ocean; Stable Isotope Analysis", "locations": "Antarctic Peninsula; Southern Ocean; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "Polito, Michael", "project_titles": "Collaborative Research: Investigating Holocene Shifts in the Diets and Paleohistory of Antarctic Krill Predators", "projects": [{"proj_uid": "p0010047", "repository": "USAP-DC", "title": "Collaborative Research: Investigating Holocene Shifts in the Diets and Paleohistory of Antarctic Krill Predators"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.0, "title": "Carbon and nitrogen stable isotope values of Antarctic Krill from the South Shetland Islands and the northern Antarctic Peninsula 2007 and 2009", "uid": "601210", "west": -63.0}, {"awards": "1643901 Zhang, Weifeng", "bounds_geometry": ["POLYGON((55 -62,65 -62,75 -62,85 -62,95 -62,105 -62,115 -62,125 -62,135 -62,145 -62,155 -62,155 -62.8,155 -63.6,155 -64.4,155 -65.2,155 -66,155 -66.8,155 -67.6,155 -68.4,155 -69.2,155 -70,145 -70,135 -70,125 -70,115 -70,105 -70,95 -70,85 -70,75 -70,65 -70,55 -70,55 -69.2,55 -68.4,55 -67.6,55 -66.8,55 -66,55 -65.2,55 -64.4,55 -63.6,55 -62.8,55 -62))"], "date_created": "Tue, 10 Sep 2019 00:00:00 GMT", "description": "The emperor penguin, an iconic species threatened by projected sea-ice loss in Antarctica, has long been considered to forage at the fast ice edge, presumably relying on large/yearly-persistent polynyas as their main foraging habitat during the breeding season. Using newly developed fine-scale sea-icescape data and historical penguin tracking data, this study for the first time suggests the importance of less-recognized small openings, including cracks, flaw leads and ephemeral short-term polynyas, as foraging habitats for emperor penguins. The tracking data retrieved from 47 emperor penguins in two different colonies in East Antarctica suggest that those penguins spent 23% of their time in ephemeral polynyas and did not use the large/yearly-persistent, well-studied polynyas, even they occur much more regularly with predictable locations. These findings challenge our previous understanding of emperor penguin breeding habitats, highlighting the need for incorporating fine-scale seascape features when assessing the population persistence in a rapidly changing polar environment.", "east": 155.0, "geometry": ["POINT(105 -66)"], "keywords": "Animal Behavior Observation; Antarctica; Biota; East Antarctica; GPS; Oceans; Penguin; Southern Ocean", "locations": "Antarctica; Southern Ocean; East Antarctica", "north": -62.0, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Labrousse, Sara; Fraser, Alexander; Tamura, Takeshi; Pinaud, David; Wienecke, Barbara; Kirkwood, Roger; Ropert-Coudert, Yan; Resinger, Ryan; Jonsen, Ian; Porter-Smith, Rick; Barbraud, Christophe; Bost, Charles-Andr\u00e9; Ji, Rubao; Jenouvrier, Stephanie; Sumner, Michael", "project_titles": "Collaborative Research: Polynyas in Coastal Antarctica (PICA): Linking Physical Dynamics to Biological Variability", "projects": [{"proj_uid": "p0010044", "repository": "USAP-DC", "title": "Collaborative Research: Polynyas in Coastal Antarctica (PICA): Linking Physical Dynamics to Biological Variability"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -70.0, "title": "Dynamic fine-scale sea-icescape shapes adult emperor penguin foraging habitat in East Antarctica", "uid": "601209", "west": 55.0}, {"awards": "1443248 Hall, Brenda", "bounds_geometry": ["POLYGON((-170 -84,-168 -84,-166 -84,-164 -84,-162 -84,-160 -84,-158 -84,-156 -84,-154 -84,-152 -84,-150 -84,-150 -84.16,-150 -84.32,-150 -84.48,-150 -84.64,-150 -84.8,-150 -84.96,-150 -85.12,-150 -85.28,-150 -85.44,-150 -85.6,-152 -85.6,-154 -85.6,-156 -85.6,-158 -85.6,-160 -85.6,-162 -85.6,-164 -85.6,-166 -85.6,-168 -85.6,-170 -85.6,-170 -85.44,-170 -85.28,-170 -85.12,-170 -84.96,-170 -84.8,-170 -84.64,-170 -84.48,-170 -84.32,-170 -84.16,-170 -84))"], "date_created": "Thu, 05 Sep 2019 00:00:00 GMT", "description": "", "east": -150.0, "geometry": ["POINT(-160 -84.8)"], "keywords": "Antarctica; Carbon; Glaciology; Holocene; Radiocarbon; Ross Embayment; Ross Sea; Transantarctic Mountains", "locations": "Transantarctic Mountains; Ross Embayment; Ross Sea; Antarctica", "north": -84.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Hall, Brenda", "project_titles": "Collaborative Research: High-resolution Reconstruction of Holocene Deglaciation in the Southern Ross Embayment", "projects": [{"proj_uid": "p0010053", "repository": "USAP-DC", "title": "Collaborative Research: High-resolution Reconstruction of Holocene Deglaciation in the Southern Ross Embayment"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -85.6, "title": "Liv and Amundsen Glacier Radiocarbon Data", "uid": "601208", "west": -170.0}, {"awards": "1341513 Maksym, Edward", "bounds_geometry": ["POLYGON((-180 -68,-179 -68,-178 -68,-177 -68,-176 -68,-175 -68,-174 -68,-173 -68,-172 -68,-171 -68,-170 -68,-170 -68.8,-170 -69.6,-170 -70.4,-170 -71.2,-170 -72,-170 -72.8,-170 -73.6,-170 -74.4,-170 -75.2,-170 -76,-171 -76,-172 -76,-173 -76,-174 -76,-175 -76,-176 -76,-177 -76,-178 -76,-179 -76,180 -76,179 -76,178 -76,177 -76,176 -76,175 -76,174 -76,173 -76,172 -76,171 -76,170 -76,170 -75.2,170 -74.4,170 -73.6,170 -72.8,170 -72,170 -71.2,170 -70.4,170 -69.6,170 -68.8,170 -68,171 -68,172 -68,173 -68,174 -68,175 -68,176 -68,177 -68,178 -68,179 -68,-180 -68))"], "date_created": "Fri, 30 Aug 2019 00:00:00 GMT", "description": "Layer Cakes for the PIPERS ice stations 4, 7, 8 and 9 (05/24, 05/29, 05/31, 06/02) with snow depth (both raw and interpolated), surface lidar scan and ice draft AUV scan aligned onto a common 100m x 100m grid, binned at 0.2m resolution.", "east": -170.0, "geometry": ["POINT(180 -72)"], "keywords": "Antarctica; Digital Elevation Model; Glaciology; Ice; Ice Thickness; Ice Thickness Distribution; LIDAR; NBP1704; PIPERS; Ross Sea; R/v Nathaniel B. Palmer; Sea Ice; Snow; Snow Depth; Surface Elevation", "locations": "Antarctica; Ross Sea", "north": -68.0, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Mei, M. Jeffrey; Maksym, Edward; Jeffrey Mei, M.", "project_titles": "Collaborative Research: Seasonal Sea Ice Production in the Ross Sea, Antarctica", "projects": [{"proj_uid": "p0010032", "repository": "USAP-DC", "title": "Collaborative Research: Seasonal Sea Ice Production in the Ross Sea, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -76.0, "title": "Sea Ice Layer Cakes, PIPERS 2017", "uid": "601207", "west": 170.0}, {"awards": "1443336 Osterberg, Erich", "bounds_geometry": ["POINT(-180 -90)"], "date_created": "Thu, 29 Aug 2019 00:00:00 GMT", "description": "The South Pole Ice Core (SPICEcore) was drilled in 2014-2016 to provide a detailed multi-proxy archive of paleoclimate conditions in East Antarctica during the Holocene and late Pleistocene. Interpretation of these records requires an accurate depth-age relationship. Here, we present the SP19 timescale for the age of the ice of SPICEcore. SP19 is synchronized to the WD2014 chronology from the West Antarctic Ice Sheet Divide (WAIS Divide) ice core using stratigraphic matching of 251 volcanic events. These events indicate an age of 54,302 +/- 519 years BP (before the year 1950) at the bottom of SPICEcore. Annual layers identified in sodium and magnesium ions to 11,341 BP were used to interpolate between stratigraphic volcanic tie points, yielding an annually-resolved chronology through the Holocene. Estimated timescale uncertainty during the Holocene is less than 18 years relative to WD2014, with the exception of the interval between 1800 to 3100 BP when uncertainty estimates reach +/- 25 years due to widely spaced volcanic tie points. Prior to the Holocene, uncertainties remain within 124 years relative to WD2014. Results show an average Holocene accumulation rate of 7.4 cm/yr (water equivalent). The time variability of accumulation rate is consistent with expectations for steady-state ice flow through the modern spatial pattern of accumulation rate. Time variations in nitrate concentration, nitrate seasonal amplitude, and \u03b415N of N2 in turn are as expected for the accumulation-rate variations. The highly variable yet well-constrained Holocene accumulation history at the site can help improve scientific understanding of deposition-sensitive climate proxies such as \u03b415N of N2 and photolyzed chemical compounds.", "east": -180.0, "geometry": ["POINT(-180 -90)"], "keywords": "Antarctica; Calcium (ca); Chemistry:ice; Chemistry:Ice; Depth; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciochemistry; Glaciology; Ice; Ice Core; Ice Core Chemistry; Ice Core Data; Ice Core Records; Ice Core Stratigraphy; Nitrate; Nitrogen Isotopes; Paleoclimate; Snow/ice; Snow/Ice; South Pole; SPICEcore", "locations": "South Pole; Antarctica", "north": -90.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Winski, Dominic A.; Fudge, T. J.; Dunbar, Nelia; Buizert, Christo; Bay, Ryan; Souney, Joseph Jr.; Sigl, Michael; McConnell, Joseph; Fegyveresi, John; Cole-Dai, Jihong; Thundercloud, Zayta; Cox, Thomas S.; Kreutz, Karl; Epifanio, Jenna; Ortman, Nikolas; Brook, Edward J.; Beaudette, Ross; Sowers, Todd A.; Steig, Eric J.; Morris, Valerie; Kahle, Emma; Ferris, David G.; Aydin, Murat; Nicewonger, Melinda R.; Casey, Kimberly A.; Alley, Richard; Waddington, Edwin D.; Osterberg, Erich; Severinghaus, Jeffrey P.; Jones, Tyler R.; Iverson, Nels", "project_titles": "Collaborative Research: South Pole Ice Core Chronology and Climate Records using Chemical and Microparticle Measurements", "projects": [{"proj_uid": "p0010051", "repository": "USAP-DC", "title": "Collaborative Research: South Pole Ice Core Chronology and Climate Records using Chemical and Microparticle Measurements"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -90.0, "title": "The South Pole Ice Core (SPICEcore) chronology and supporting data", "uid": "601206", "west": -180.0}, {"awards": "1644073 DiTullio, Giacomo", "bounds_geometry": ["POLYGON((-180 -72.448188333,-179.35369 -72.448188333,-178.70738 -72.448188333,-178.06107 -72.448188333,-177.41476 -72.448188333,-176.76845 -72.448188333,-176.12214 -72.448188333,-175.47583 -72.448188333,-174.82952 -72.448188333,-174.18321 -72.448188333,-173.5369 -72.448188333,-173.5369 -73.0663094997,-173.5369 -73.6844306664,-173.5369 -74.3025518331,-173.5369 -74.9206729998,-173.5369 -75.5387941665,-173.5369 -76.1569153332,-173.5369 -76.7750364999,-173.5369 -77.3931576666,-173.5369 -78.0112788333,-173.5369 -78.6294,-174.18321 -78.6294,-174.82952 -78.6294,-175.47583 -78.6294,-176.12214 -78.6294,-176.76845 -78.6294,-177.41476 -78.6294,-178.06107 -78.6294,-178.70738 -78.6294,-179.35369 -78.6294,180 -78.6294,179.818135 -78.6294,179.63627 -78.6294,179.454405 -78.6294,179.27254 -78.6294,179.090675 -78.6294,178.90881 -78.6294,178.726945 -78.6294,178.54508 -78.6294,178.363215 -78.6294,178.18135 -78.6294,178.18135 -78.0112788333,178.18135 -77.3931576666,178.18135 -76.7750364999,178.18135 -76.1569153332,178.18135 -75.5387941665,178.18135 -74.9206729998,178.18135 -74.3025518331,178.18135 -73.6844306664,178.18135 -73.0663094997,178.18135 -72.448188333,178.363215 -72.448188333,178.54508 -72.448188333,178.726945 -72.448188333,178.90881 -72.448188333,179.090675 -72.448188333,179.27254 -72.448188333,179.454405 -72.448188333,179.63627 -72.448188333,179.818135 -72.448188333,-180 -72.448188333))"], "date_created": "Tue, 27 Aug 2019 00:00:00 GMT", "description": "Algal pigment concentrations as measured by HPLC from RV/IB Nathaniel B. Palmer cruise in the Ross Sea from 2017-2018", "east": -173.5369, "geometry": ["POINT(-177.677775 -75.5387941665)"], "keywords": "Antarctica; Chemistry:fluid; Chemistry:Fluid; Chlorophyll; Chromatography; Liquid Chromatograph; Oceans; Ross Sea; R/v Nathaniel B. Palmer; Sea Water; Seawater Measurements; Southern Ocean; Water Measurements; Water Samples", "locations": "Antarctica; Southern Ocean; Ross Sea", "north": -72.448188333, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Ditullio, Giacomo", "project_titles": "Collaborative Research: Cobalamin and Iron Co-Limitation Of Phytoplankton Species in Terra Nova Bay", "projects": [{"proj_uid": "p0010045", "repository": "USAP-DC", "title": "Collaborative Research: Cobalamin and Iron Co-Limitation Of Phytoplankton Species in Terra Nova Bay"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.6294, "title": "Algal pigment concentrations from the Ross Sea", "uid": "601205", "west": 178.18135}, {"awards": "1443263 Higgins, John", "bounds_geometry": ["POINT(159.35507 -76.73286)"], "date_created": "Wed, 14 Aug 2019 00:00:00 GMT", "description": "This file includes the concentration methane (CH4) in Allan Hills ice cores (ALHIC1502 and ALHIC1503).", "east": 159.35507, "geometry": ["POINT(159.35507 -76.73286)"], "keywords": "Allan Hills; Allan Hills Project; Antarctica; Chemistry:ice; Chemistry:Ice; Gas Chromatography; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Greenhouse Gas; Ice; Ice Core Data; Ice Core Gas Records; Methane; Snow/ice; Snow/Ice", "locations": "Allan Hills; Antarctica", "north": -76.73286, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Yan, Yuzhen; Bender, Michael; Brook, Edward J.; Higgins, John", "project_titles": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area", "projects": [{"proj_uid": "p0000760", "repository": "USAP-DC", "title": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.73286, "title": "Methane concentration in Allan Hills ice cores", "uid": "601203", "west": 159.35507}, {"awards": "1443263 Higgins, John", "bounds_geometry": ["POINT(159.35507 -76.73286)"], "date_created": "Wed, 14 Aug 2019 00:00:00 GMT", "description": "This file includes the concentration of carbon dioxide (CO2) and methane (CH4) and the stable carbon isotope composition of CO2 in Allan Hills ice cores (ALHIC1502 and ALHIC1503).", "east": 159.35507, "geometry": ["POINT(159.35507 -76.73286)"], "keywords": "Allan Hills; Allan Hills Project; Antarctica; Carbon Dioxide; Carbon Isotopes; Chemistry:ice; Chemistry:Ice; CO2; Gas Chromatography; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice; Ice Core Data; Ice Core Gas Records; Ice Core Records; Mass Spectrometer; Mass Spectrometry; Methane; Snow/ice; Snow/Ice", "locations": "Antarctica; Allan Hills", "north": -76.73286, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Yan, Yuzhen; Bender, Michael; Brook, Edward J.; Higgins, John", "project_titles": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area", "projects": [{"proj_uid": "p0000760", "repository": "USAP-DC", "title": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.73286, "title": "Carbon dioxide concentration and its stable carbon isotope composition in Allan Hills ice cores", "uid": "601202", "west": 159.35507}, {"awards": "1443263 Higgins, John", "bounds_geometry": ["POINT(159.35507 -76.73286)"], "date_created": "Wed, 14 Aug 2019 00:00:00 GMT", "description": "This file includes argon isotope composition and xenon-to-krypton ratios measured in Allan Hills ice cores.", "east": 159.35507, "geometry": ["POINT(159.35507 -76.73286)"], "keywords": "Allan Hills; Allan Hills Project; Antarctica; Argon; Chemistry:ice; Chemistry:Ice; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core; Ice Core Data; Ice Core Gas Records; Krypton; Mass Spectrometer; Noble Gas; Snow/ice; Snow/Ice; Xenon", "locations": "Antarctica; Allan Hills", "north": -76.73286, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Yan, Yuzhen; Bender, Michael; Higgins, John; Ng, Jessica; Severinghaus, Jeffrey P.", "project_titles": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area", "projects": [{"proj_uid": "p0000760", "repository": "USAP-DC", "title": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.73286, "title": "Elemental and isotopic composition of heavy noble gases in Allan Hills ice cores", "uid": "601201", "west": 159.35507}, {"awards": "1822256 Smith, Craig", "bounds_geometry": ["POLYGON((-65.2349 -61.4275,-64.04392 -61.4275,-62.85294 -61.4275,-61.66196 -61.4275,-60.47098 -61.4275,-59.28 -61.4275,-58.08902 -61.4275,-56.89804 -61.4275,-55.70706 -61.4275,-54.51608 -61.4275,-53.3251 -61.4275,-53.3251 -61.80824,-53.3251 -62.18898,-53.3251 -62.56972,-53.3251 -62.95046,-53.3251 -63.3312,-53.3251 -63.71194,-53.3251 -64.09268,-53.3251 -64.47342,-53.3251 -64.85416,-53.3251 -65.2349,-54.51608 -65.2349,-55.70706 -65.2349,-56.89804 -65.2349,-58.08902 -65.2349,-59.28 -65.2349,-60.47098 -65.2349,-61.66196 -65.2349,-62.85294 -65.2349,-64.04392 -65.2349,-65.2349 -65.2349,-65.2349 -64.85416,-65.2349 -64.47342,-65.2349 -64.09268,-65.2349 -63.71194,-65.2349 -63.3312,-65.2349 -62.95046,-65.2349 -62.56972,-65.2349 -62.18898,-65.2349 -61.80824,-65.2349 -61.4275))"], "date_created": "Mon, 12 Aug 2019 00:00:00 GMT", "description": "The dataset provides metadata for towed yoyo camera survey transects conducted in Maxwell Bay, Marion Cove (King George Island) and the Bransfield Strait. Starting and ending positions, ship headings, bottom depth and number of photographs collected are provided. In all photographs, lasers are 10 cm apart for scale. Data were collected aboard the Korean Polar Research Institute icebreaker Araon.", "east": -53.3251, "geometry": ["POINT(-59.28 -63.3312)"], "keywords": "Antarctica; Araon; Araon Ana08d; Benthic Images; Benthos; Photo/video; Photo/Video; Southern Ocean; Station List; Yoyo Camera", "locations": "Antarctica; Southern Ocean", "north": -61.4275, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Smith, Craig; Ziegler, Amanda", "project_titles": "RAPID: Collaborative Research: Marine Ecosystem Response to the Larsen C Ice-Shelf Breakout: \"Time zero\"", "projects": [{"proj_uid": "p0010029", "repository": "USAP-DC", "title": "RAPID: Collaborative Research: Marine Ecosystem Response to the Larsen C Ice-Shelf Breakout: \"Time zero\""}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.2349, "title": "Yoyo camera survey transects, King George Island and Bransfield Strait", "uid": "601199", "west": -65.2349}, {"awards": "1245659 Petrenko, Vasilii; 1245821 Brook, Edward J.; 1246148 Severinghaus, Jeffrey", "bounds_geometry": ["POINT(162.167 -77.733)"], "date_created": "Mon, 12 Aug 2019 00:00:00 GMT", "description": "New ice cores retrieved from the Taylor Glacier (Antarctica) blue ice area contain ice and air spanning the Marine Isotope Stage (MIS) 5-4 transition, a period of global cooling and ice sheet expansion. We determine chronologies for the ice and air bubbles in the new ice cores by visually matching variations in gas- and ice- phase tracers to preexisting ice core records. The chronologies reveal an ice age-gas age difference (\u0394age) approaching 10 ka during MIS 4, implying very low snow accumulation in the Taylor Glacier accumulation zone. A revised chronology for the analagous section of the Taylor Dome ice core (84 to 55 ka), located to the south of the Taylor Glacier accumulation zone, shows that \u0394age did not exceed 3 ka. The difference in \u0394age between the two records during MIS 4 is similar in magnitude but opposite in direction to what is observed at the Last Glacial Maximum. This relationship implies that a spatial gradient in snow accumulation existed across the Taylor Dome region during MIS 4 that was oriented in the opposite direction of the accumulation gradient during the Last Glacial Maximum.", "east": 162.167, "geometry": ["POINT(162.167 -77.733)"], "keywords": "Antarctica; Blue Ice; Chemistry:ice; Chemistry:Ice; CO2; Dust; Gas; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core; Ice Core Records; Mass Spectrometer; Methane; Nitrogen Isotopes; Oxygen Isotope; Paleoclimate; Snow/ice; Snow/Ice; Taylor Dome; Taylor Dome Ice Core", "locations": "Taylor Dome; Antarctica", "north": -77.733, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology", "persons": "Menking, James; Brook, Edward J.; Marcott, Shaun; Barker, Stephen; Shackleton, Sarah; Dyonisius, Michael; Petrenko, Vasilii; McConnell, Joseph; Rhodes, Rachel; Bauska, Thomas; Baggenstos, Daniel; Severinghaus, Jeffrey P.", "project_titles": "Collaborative Research: The Taylor Glacier, Antarctica, Horizontal Ice Core: Exploring changes in the Natural Methane Budget in a Warming World and Expanding the Paleo-archive", "projects": [{"proj_uid": "p0000283", "repository": "USAP-DC", "title": "Collaborative Research: The Taylor Glacier, Antarctica, Horizontal Ice Core: Exploring changes in the Natural Methane Budget in a Warming World and Expanding the Paleo-archive"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.733, "title": "Gas and Dust Measurements for Taylor Glacier and Taylor Dome Ice Cores", "uid": "601198", "west": 162.167}, {"awards": "1443550 Brook, Edward J.", "bounds_geometry": ["POINT(-180 -90)"], "date_created": "Thu, 08 Aug 2019 00:00:00 GMT", "description": "Measurements of CO2, N2O, and the isotopic composition of CO2 from the Holocene section of SPICEcore", "east": -180.0, "geometry": ["POINT(-180 -90)"], "keywords": "Antarctica; Carbon Dioxide; Ice Core Gas Records; Nitrous Oxide; South Pole; SPICEcore", "locations": "South Pole; Antarctica", "north": -90.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Brook, Edward J.", "project_titles": "Controls on Variations in Atmospheric Carbon Dioxide and Nitrous Oxide During the Last 10,000 years", "projects": [{"proj_uid": "p0010043", "repository": "USAP-DC", "title": "Controls on Variations in Atmospheric Carbon Dioxide and Nitrous Oxide During the Last 10,000 years"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -90.0, "title": "SPICEcore Holocene CO2 and N2O data", "uid": "601197", "west": -180.0}, {"awards": "1543229 Severinghaus, Jeffrey", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Fri, 02 Aug 2019 00:00:00 GMT", "description": "This data comprises a survey of Recent ice from multiple sites in Antarctica using shallow ice cores to examine noble gas values in ice that nominally has the same Mean Ocean Temperature as today. The goal is to elucidate fractionation that occurs in the firn before air is trapped in bubbles in the ice, by making the assumption that the atmosphere noble gas content has not changed since this air was trappped. The ages of the air samples are typically early Industrial Revolution or late Holocene.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Data; Krypton; Noble Gas; Xenon", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Severinghaus, Jeffrey P.; Shackleton, Sarah", "project_titles": "Collaborative research: Kr-86 as a proxy for barometric pressure variability and movement of the SH westerlies during the last\r\ndeglaciation", "projects": [{"proj_uid": "p0010037", "repository": "USAP-DC", "title": "Collaborative research: Kr-86 as a proxy for barometric pressure variability and movement of the SH westerlies during the last\r\ndeglaciation"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Noble Gas Data from recent ice in Antarctica for 86Kr problem", "uid": "601195", "west": -180.0}, {"awards": "1148982 Hansen, Samantha", "bounds_geometry": ["POLYGON((150 -72,152 -72,154 -72,156 -72,158 -72,160 -72,162 -72,164 -72,166 -72,168 -72,170 -72,170 -72.3,170 -72.6,170 -72.9,170 -73.2,170 -73.5,170 -73.8,170 -74.1,170 -74.4,170 -74.7,170 -75,168 -75,166 -75,164 -75,162 -75,160 -75,158 -75,156 -75,154 -75,152 -75,150 -75,150 -74.7,150 -74.4,150 -74.1,150 -73.8,150 -73.5,150 -73.2,150 -72.9,150 -72.6,150 -72.3,150 -72))"], "date_created": "Wed, 31 Jul 2019 00:00:00 GMT", "description": "The Transantarctic Mountains (TAMs) are the largest non-collisional mountain range on Earth. Their origin, as well as the origin of the Wilkes Subglacial Basin (WSB) along the inland side of the TAMs, have been widely debated, and a key constraint to distinguish between competing models is the underlying crustal structure. Previous investigations have examined this structure but have primarily focused on a small region of the central TAMs near Ross Island, providing little along-strike constraint. In this study, we use data from the new Transantarctic Mountains Northern Network and from five stations operated by the Korea Polar Research Institute to investigate the crustal structure beneath a previously unexplored portion of the TAMs. Using S-wave receiver functions and Rayleigh wave phase velocities, crustal thickness and average crustal shear velocity (\uf8e5Vs) are resolved within \u00b14 km and \u00b10.1 km/s, respectively. The crust thickens from ~20 km near the Ross Sea coast to ~46 km beneath the northern TAMs, which is somewhat thicker than that imaged in previous studies beneath the central TAMs. The crust thins to ~41 km beneath the WSB.\uf8e5Vs ranges from ~3.1-3.9 km/s, with slower velocities near the coast. Our findings are consistent with a flexural origin for the TAMs and WSB, where these features result from broad flexure of the East Antarctic lithosphere and uplift along its western edge due to thermal conduction from hotter mantle beneath West Antarctica. Locally thicker crust may explain the ~1 km of additional topography in the northern TAMs compared to the central TAMs.", "east": 170.0, "geometry": ["POINT(160 -73.5)"], "keywords": "Antarctica; Transantarctic Mountains", "locations": "Antarctica; Transantarctic Mountains", "north": -72.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Hansen, Samantha", "project_titles": "CAREER: Deciphering the Tectonic History of the Transantarctic Mountains and the Wilkes Subglacial Basin", "projects": [{"proj_uid": "p0000300", "repository": "USAP-DC", "title": "CAREER: Deciphering the Tectonic History of the Transantarctic Mountains and the Wilkes Subglacial Basin"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -75.0, "title": "Crustal Structure beneath the Northern Transantarctic Mountains and Wilkes Subglacial Basin: Implications for Tectonic Origins", "uid": "601194", "west": 150.0}, {"awards": "1443680 Smith, Craig", "bounds_geometry": ["POLYGON((-65.561 -64.6538,-65.2471 -64.6538,-64.9332 -64.6538,-64.6193 -64.6538,-64.3054 -64.6538,-63.9915 -64.6538,-63.6776 -64.6538,-63.3637 -64.6538,-63.0498 -64.6538,-62.7359 -64.6538,-62.422 -64.6538,-62.422 -64.67842,-62.422 -64.70304,-62.422 -64.72766,-62.422 -64.75228,-62.422 -64.7769,-62.422 -64.80152,-62.422 -64.82614,-62.422 -64.85076,-62.422 -64.87538,-62.422 -64.9,-62.7359 -64.9,-63.0498 -64.9,-63.3637 -64.9,-63.6776 -64.9,-63.9915 -64.9,-64.3054 -64.9,-64.6193 -64.9,-64.9332 -64.9,-65.2471 -64.9,-65.561 -64.9,-65.561 -64.87538,-65.561 -64.85076,-65.561 -64.82614,-65.561 -64.80152,-65.561 -64.7769,-65.561 -64.75228,-65.561 -64.72766,-65.561 -64.70304,-65.561 -64.67842,-65.561 -64.6538))"], "date_created": "Tue, 16 Jul 2019 00:00:00 GMT", "description": "This dataset includes Pb-210 activities, grain-size distributions, and x-radiograph negatives for cores collected primarily during NBP1603 (and also LMG1510) as part of the FjordEco project in Andvord Bay and surrounding areas (Gerlache Strait, and Station B on the shelf). Data are from subsampled intervals of kasten cores and box cores, as well as one megacore. Samples were x-rayed, sliced, and bagged onboard the vessel. Grain-size and Pb-210 analyses were completed in the Sediment Dynamics Lab within the University of Washington School of Oceanography (PI C. Nittrouer).", "east": -62.422, "geometry": ["POINT(-63.9915 -64.7769)"], "keywords": "Antarctica; Geochronology; Grain Size; LMG1510; NBP1603; Sediment; Sediment Core Data", "locations": "Antarctica", "north": -64.6538, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Eidam, Emily; Nittrouer, Charles; Homolka, Khadijah; Smith, Craig", "project_titles": "Collaborative Research: Fjord Ecosystem Structure and Function on the West Antarctic Peninsula - Hotspots of Productivity and Biodiversity? (FjordEco)", "projects": [{"proj_uid": "p0010010", "repository": "USAP-DC", "title": "Collaborative Research: Fjord Ecosystem Structure and Function on the West Antarctic Peninsula - Hotspots of Productivity and Biodiversity? (FjordEco)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.9, "title": "Andvord Bay sediment core data collected during the FjordEco project (LMG1510 and NBP1603)", "uid": "601193", "west": -65.561}, {"awards": "1341606 Stammerjohn, Sharon", "bounds_geometry": ["POLYGON((-180 -71.088,-179.7593 -71.088,-179.5186 -71.088,-179.2779 -71.088,-179.0372 -71.088,-178.7965 -71.088,-178.5558 -71.088,-178.3151 -71.088,-178.0744 -71.088,-177.8337 -71.088,-177.593 -71.088,-177.593 -71.5318,-177.593 -71.9756,-177.593 -72.4194,-177.593 -72.8632,-177.593 -73.307,-177.593 -73.7508,-177.593 -74.1946,-177.593 -74.6384,-177.593 -75.0822,-177.593 -75.526,-177.8337 -75.526,-178.0744 -75.526,-178.3151 -75.526,-178.5558 -75.526,-178.7965 -75.526,-179.0372 -75.526,-179.2779 -75.526,-179.5186 -75.526,-179.7593 -75.526,180 -75.526,179.1926 -75.526,178.3852 -75.526,177.5778 -75.526,176.7704 -75.526,175.963 -75.526,175.1556 -75.526,174.3482 -75.526,173.5408 -75.526,172.7334 -75.526,171.926 -75.526,171.926 -75.0822,171.926 -74.6384,171.926 -74.1946,171.926 -73.7508,171.926 -73.307,171.926 -72.8632,171.926 -72.4194,171.926 -71.9756,171.926 -71.5318,171.926 -71.088,172.7334 -71.088,173.5408 -71.088,174.3482 -71.088,175.1556 -71.088,175.963 -71.088,176.7704 -71.088,177.5778 -71.088,178.3852 -71.088,179.1926 -71.088,-180 -71.088))"], "date_created": "Wed, 10 Jul 2019 00:00:00 GMT", "description": "Atmospheric boundary layer temperature, humidity, pressure, and wind profile data collected with the Small Unmanned Meteorological Observer (SUMO) unmanned aerial system (UAS) during the NBP1704 PIPERS cruise.\r\n", "east": -177.593, "geometry": ["POINT(177.1665 -73.307)"], "keywords": "Air Temperature; Antarctica; Atmosphere; Meteorology; NBP1704; PIPERS; R/v Nathaniel B. Palmer; Southern Ocean; Temperature Profiles; UAV; Unmanned Aircraft", "locations": "Antarctica; Southern Ocean", "north": -71.088, "nsf_funding_programs": "Antarctic Instrumentation and Support", "persons": "Cassano, John", "project_titles": "Collaborative Research: Seasonal Sea Ice Production in the Ross Sea, Antarctica", "projects": [{"proj_uid": "p0010032", "repository": "USAP-DC", "title": "Collaborative Research: Seasonal Sea Ice Production in the Ross Sea, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -75.526, "title": "SUMO unmanned aerial system (UAS) atmospheric data", "uid": "601191", "west": 171.926}, {"awards": "1443232 Waddington, Edwin", "bounds_geometry": ["POINT(-180 -90)"], "date_created": "Mon, 08 Jul 2019 00:00:00 GMT", "description": "These are AC-ECM data used to identify volcanic events in SPICEcore. The data have been normalized to get a consistent baseline for data collected from three different processing seasons.", "east": -180.0, "geometry": ["POINT(-180 -90)"], "keywords": "Antarctica; Electrical Conductivity; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core; Ice Core Records; Physical Properties; Snow/ice; Snow/Ice; South Pole; SPICEcore; Volcanic", "locations": "Antarctica; South Pole", "north": -90.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Waddington, Edwin D.; Fudge, T. J.", "project_titles": "Using Electrical Conductance Measurements to Develop the South Pole Ice Core Chronology", "projects": [{"proj_uid": "p0000378", "repository": "USAP-DC", "title": "Using Electrical Conductance Measurements to Develop the South Pole Ice Core Chronology"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -90.0, "title": "AC-ECM for SPICEcore", "uid": "601189", "west": -180.0}, {"awards": "1341717 Ackley, Stephen", "bounds_geometry": ["POLYGON((-180 -71,-178.3 -71,-176.6 -71,-174.9 -71,-173.2 -71,-171.5 -71,-169.8 -71,-168.1 -71,-166.4 -71,-164.7 -71,-163 -71,-163 -71.7,-163 -72.4,-163 -73.1,-163 -73.8,-163 -74.5,-163 -75.2,-163 -75.9,-163 -76.6,-163 -77.3,-163 -78,-164.7 -78,-166.4 -78,-168.1 -78,-169.8 -78,-171.5 -78,-173.2 -78,-174.9 -78,-176.6 -78,-178.3 -78,180 -78,178.4 -78,176.8 -78,175.2 -78,173.6 -78,172 -78,170.4 -78,168.8 -78,167.2 -78,165.6 -78,164 -78,164 -77.3,164 -76.6,164 -75.9,164 -75.2,164 -74.5,164 -73.8,164 -73.1,164 -72.4,164 -71.7,164 -71,165.6 -71,167.2 -71,168.8 -71,170.4 -71,172 -71,173.6 -71,175.2 -71,176.8 -71,178.4 -71,-180 -71))"], "date_created": "Tue, 02 Jul 2019 00:00:00 GMT", "description": "The PIPERS LiDAR swath data set contains LiDAR measurements taken over the Ross Sea in Antarctica. These data also have been converted to GeoTIFF and LAS-Dataset formats, which are available with this dataset.\nThe PIPERS project flew for two consecutive years during November of 2016 and 2017, with the IcePod. A total of three flights were flown.", "east": 164.0, "geometry": ["POINT(-179.5 -74.5)"], "keywords": "Aerogeophysics; Airborne Laser Altimetry; Antarctica; LIDAR; PIPERS; Ross Sea; Sea Ice", "locations": "Antarctica; Ross Sea", "north": -71.0, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Bell, Robin; Locke, Caitlin; Bertinato, Christopher; Xie, Hongjie; Dhakal, Tejendra", "project_titles": "Collaborative Research: Seasonal Sea Ice Production in the Ross Sea, Antarctica", "projects": [{"proj_uid": "p0010032", "repository": "USAP-DC", "title": "Collaborative Research: Seasonal Sea Ice Production in the Ross Sea, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "PIPERS Airborne LiDAR Data", "uid": "601188", "west": -163.0}, {"awards": "1341725 Guest, Peter", "bounds_geometry": ["POLYGON((-180 -62,-179.5 -62,-179 -62,-178.5 -62,-178 -62,-177.5 -62,-177 -62,-176.5 -62,-176 -62,-175.5 -62,-175 -62,-175 -63.6,-175 -65.2,-175 -66.8,-175 -68.4,-175 -70,-175 -71.6,-175 -73.2,-175 -74.8,-175 -76.4,-175 -78,-175.5 -78,-176 -78,-176.5 -78,-177 -78,-177.5 -78,-178 -78,-178.5 -78,-179 -78,-179.5 -78,180 -78,178.8 -78,177.6 -78,176.4 -78,175.2 -78,174 -78,172.8 -78,171.6 -78,170.4 -78,169.2 -78,168 -78,168 -76.4,168 -74.8,168 -73.2,168 -71.6,168 -70,168 -68.4,168 -66.8,168 -65.2,168 -63.6,168 -62,169.2 -62,170.4 -62,171.6 -62,172.8 -62,174 -62,175.2 -62,176.4 -62,177.6 -62,178.8 -62,-180 -62))"], "date_created": "Wed, 12 Jun 2019 00:00:00 GMT", "description": "This file contains rawinsonde data from 134 rawisnonde soundings performed during the 2017 PIPERS cruise for the period 14 April 2330 \u2013 5 June 1130 (UT). ", "east": -175.0, "geometry": ["POINT(176.5 -70)"], "keywords": "Air Temperature; Antarctica; Atmosphere; Atmospheric Surface Winds; Meteorology; NBP1704; PIPERS; Pressure; Radiosonde; Rawinsonde; Relative Humidity; Ross Sea; R/v Nathaniel B. Palmer; Wind Direction; Wind Speed", "locations": "Ross Sea; Antarctica", "north": -62.0, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Guest, Peter", "project_titles": "Collaborative Research: Seasonal Sea Ice Production in the Ross Sea, Antarctica", "projects": [{"proj_uid": "p0010032", "repository": "USAP-DC", "title": "Collaborative Research: Seasonal Sea Ice Production in the Ross Sea, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "PIPERS Meteorology Rawinsonde Data", "uid": "601185", "west": 168.0}, {"awards": "1341725 Guest, Peter", "bounds_geometry": ["POLYGON((-180 -62,-179.5 -62,-179 -62,-178.5 -62,-178 -62,-177.5 -62,-177 -62,-176.5 -62,-176 -62,-175.5 -62,-175 -62,-175 -63.6,-175 -65.2,-175 -66.8,-175 -68.4,-175 -70,-175 -71.6,-175 -73.2,-175 -74.8,-175 -76.4,-175 -78,-175.5 -78,-176 -78,-176.5 -78,-177 -78,-177.5 -78,-178 -78,-178.5 -78,-179 -78,-179.5 -78,180 -78,178.8 -78,177.6 -78,176.4 -78,175.2 -78,174 -78,172.8 -78,171.6 -78,170.4 -78,169.2 -78,168 -78,168 -76.4,168 -74.8,168 -73.2,168 -71.6,168 -70,168 -68.4,168 -66.8,168 -65.2,168 -63.6,168 -62,169.2 -62,170.4 -62,171.6 -62,172.8 -62,174 -62,175.2 -62,176.4 -62,177.6 -62,178.8 -62,-180 -62))"], "date_created": "Wed, 12 Jun 2019 00:00:00 GMT", "description": "This file contains times series data from the 2017 PIPERS cruise for the period 15 April 0000 \u2013 8 June 1200 (UT). The time series data represent one minute means and include data collected by the Naval Postgraduate School from the starboard side boom (including occasionally on ice surface temp sampling), radiation system on the helo deck and sometimes in situ surface temp. Also included are meteorological, navigation and surface oceanography (from intake) data from the standard ship systems. ", "east": -175.0, "geometry": ["POINT(176.5 -70)"], "keywords": "Air Temperature; Antarctica; Atmosphere; Meteorology; Near-Surface Air Temperatures; PIPERS; Radiation; Sea Ice Temperatures; Temperature; Weather Station Data; Wind Direction; Wind Speed", "locations": "Antarctica", "north": -62.0, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Guest, Peter", "project_titles": "Collaborative Research: Seasonal Sea Ice Production in the Ross Sea, Antarctica", "projects": [{"proj_uid": "p0010032", "repository": "USAP-DC", "title": "Collaborative Research: Seasonal Sea Ice Production in the Ross Sea, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "PIPERS Meteorology Time Series", "uid": "601184", "west": 168.0}, {"awards": "1341717 Ackley, Stephen", "bounds_geometry": ["POLYGON((-180 -55,-177 -55,-174 -55,-171 -55,-168 -55,-165 -55,-162 -55,-159 -55,-156 -55,-153 -55,-150 -55,-150 -57.3,-150 -59.6,-150 -61.9,-150 -64.2,-150 -66.5,-150 -68.8,-150 -71.1,-150 -73.4,-150 -75.7,-150 -78,-153 -78,-156 -78,-159 -78,-162 -78,-165 -78,-168 -78,-171 -78,-174 -78,-177 -78,180 -78,178 -78,176 -78,174 -78,172 -78,170 -78,168 -78,166 -78,164 -78,162 -78,160 -78,160 -75.7,160 -73.4,160 -71.1,160 -68.8,160 -66.5,160 -64.2,160 -61.9,160 -59.6,160 -57.3,160 -55,162 -55,164 -55,166 -55,168 -55,170 -55,172 -55,174 -55,176 -55,178 -55,-180 -55))"], "date_created": "Mon, 10 Jun 2019 00:00:00 GMT", "description": "This dataset is the csv file of hourly visual ice observations conducted in the ASPeCt protocol on the PIPERS cruise NBP1704 to the Ross Sea during April to June 5 2017. Parameters are ice concentration, thickness, snow depth, floe sizes, etc for up to three categories of ice type within a 1km radius of the ship during the observation. These are identified by date, time and latitude, longitude at the time of observations", "east": -150.0, "geometry": ["POINT(-175 -66.5)"], "keywords": "Antarctica; Glaciology; Ice Concentration; Ice Thickness; Ice Type; NBP1704; Oceans; Ross Sea; R/v Nathaniel B. Palmer; Sea Ice; Snow Depth; Snow/ice; Snow/Ice; Visual Observations", "locations": "Ross Sea; Antarctica", "north": -55.0, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Ackley, Stephen", "project_titles": "Collaborative Research: Seasonal Sea Ice Production in the Ross Sea, Antarctica", "projects": [{"proj_uid": "p0010032", "repository": "USAP-DC", "title": "Collaborative Research: Seasonal Sea Ice Production in the Ross Sea, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "ASPeCt Visual Ice Observations on PIPERS Cruise NBP1704 April-June 2017", "uid": "601183", "west": 160.0}, {"awards": "1246357 Bart, Philip", "bounds_geometry": ["POLYGON((-171 -75.8,-170.5 -75.8,-170 -75.8,-169.5 -75.8,-169 -75.8,-168.5 -75.8,-168 -75.8,-167.5 -75.8,-167 -75.8,-166.5 -75.8,-166 -75.8,-166 -75.99,-166 -76.18,-166 -76.37,-166 -76.56,-166 -76.75,-166 -76.94,-166 -77.13,-166 -77.32,-166 -77.51,-166 -77.7,-166.5 -77.7,-167 -77.7,-167.5 -77.7,-168 -77.7,-168.5 -77.7,-169 -77.7,-169.5 -77.7,-170 -77.7,-170.5 -77.7,-171 -77.7,-171 -77.51,-171 -77.32,-171 -77.13,-171 -76.94,-171 -76.75,-171 -76.56,-171 -76.37,-171 -76.18,-171 -75.99,-171 -75.8))"], "date_created": "Mon, 03 Jun 2019 00:00:00 GMT", "description": "Still and video benthic images collected during expedition NBP1502 in the Ross Sea using a YoYo camera system.", "east": -166.0, "geometry": ["POINT(-168.5 -76.75)"], "keywords": "Antarctica; Benthic; Benthic Images; Benthos; Bentic Fauna; Camera Tow; Marine Geoscience; Marine Sediments; NBP1502; Photo; Photo/video; Photo/Video; Ross Sea; R/v Nathaniel B. Palmer; Southern Ocean; Yoyo Camera", "locations": "Antarctica; Ross Sea; Southern Ocean", "north": -75.8, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Bart, Philip", "project_titles": "Timing and Duration of the LGM and Post-LGM Grounding Events in Whales Deep Paleo Ice Stream, Eastern Ross Sea Middle Continental Shelf", "projects": [{"proj_uid": "p0000877", "repository": "USAP-DC", "title": "Timing and Duration of the LGM and Post-LGM Grounding Events in Whales Deep Paleo Ice Stream, Eastern Ross Sea Middle Continental Shelf"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.7, "title": "NBP1502 YoYo camera benthic images from Ross Sea", "uid": "601182", "west": -171.0}, {"awards": "1443356 Conway, Howard; 1443552 Paul Winberry, J.", "bounds_geometry": ["POLYGON((-174.95 -82.65,-174.35 -82.65,-173.75 -82.65,-173.15 -82.65,-172.55 -82.65,-171.95 -82.65,-171.35 -82.65,-170.75 -82.65,-170.15 -82.65,-169.55 -82.65,-168.95 -82.65,-168.95 -82.729,-168.95 -82.808,-168.95 -82.887,-168.95 -82.966,-168.95 -83.045,-168.95 -83.124,-168.95 -83.203,-168.95 -83.282,-168.95 -83.361,-168.95 -83.44,-169.55 -83.44,-170.15 -83.44,-170.75 -83.44,-171.35 -83.44,-171.95 -83.44,-172.55 -83.44,-173.15 -83.44,-173.75 -83.44,-174.35 -83.44,-174.95 -83.44,-174.95 -83.361,-174.95 -83.282,-174.95 -83.203,-174.95 -83.124,-174.95 -83.045,-174.95 -82.966,-174.95 -82.887,-174.95 -82.808,-174.95 -82.729,-174.95 -82.65))"], "date_created": "Mon, 20 May 2019 00:00:00 GMT", "description": "This data set contains radar-detected measurements of surface topography, internal stratigraphy, ice thickness and derived bed topography across Crary Ice Rise in the Ross Sea Embayment.", "east": -168.95, "geometry": ["POINT(-171.95 -83.045)"], "keywords": "Antarctica; Bed Elevation; Crary Ice Rise; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Ice Penetrating Radar; Ice Sheet Elevation; Ice Shelf; Ice Thickness; Internal Stratigraphy; Radar; Ross Ice Shelf; Snow/ice; Snow/Ice; Surface Elevation", "locations": "Ross Ice Shelf; Antarctica; Crary Ice Rise", "north": -82.65, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Conway, Howard; Koutnik, Michelle; Winberry, Paul; Paden, John", "project_titles": "Collaborative Research: Grounding Line Dynamics: Crary Ice Rise Revisited", "projects": [{"proj_uid": "p0010026", "repository": "USAP-DC", "title": "Collaborative Research: Grounding Line Dynamics: Crary Ice Rise Revisited"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -83.44, "title": "Geophysical data from Crary Ice Rise, Ross Sea Embayment", "uid": "601181", "west": -174.95}, {"awards": "1246378 Shevenell, Amelia", "bounds_geometry": ["POLYGON((70 -68,70.5 -68,71 -68,71.5 -68,72 -68,72.5 -68,73 -68,73.5 -68,74 -68,74.5 -68,75 -68,75 -68.2,75 -68.4,75 -68.6,75 -68.8,75 -69,75 -69.2,75 -69.4,75 -69.6,75 -69.8,75 -70,74.5 -70,74 -70,73.5 -70,73 -70,72.5 -70,72 -70,71.5 -70,71 -70,70.5 -70,70 -70,70 -69.8,70 -69.6,70 -69.4,70 -69.2,70 -69,70 -68.8,70 -68.6,70 -68.4,70 -68.2,70 -68))"], "date_created": "Fri, 10 May 2019 00:00:00 GMT", "description": "This dataset contains 14C data, magnetic susceptibility, relative grain size percentages, 10Be", "east": 75.0, "geometry": ["POINT(72.5 -69)"], "keywords": "Antarctica; Be-10; Glaciers/ice Sheet; Glaciers/Ice Sheet; Grain Size; Late Quaternary; Magnetic Susceptibility; Mass Spectrometry; NBP0101; Paleoenvironment; Prydz Bay; Radiocarbon; R/v Nathaniel B. Palmer; Sediment; Sediment Core; Sediment Core Data", "locations": "Antarctica; Prydz Bay", "north": -68.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Shevenell, Amelia", "project_titles": "Late Quaternary Evolution of the Lambert Glacier/Amery Ice Shelf System, Prydz Bay, Antarctica", "projects": [{"proj_uid": "p0000381", "repository": "USAP-DC", "title": "Late Quaternary Evolution of the Lambert Glacier/Amery Ice Shelf System, Prydz Bay, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -70.0, "title": "Geochemical and sedimentologic data from NBP01-01 JPC-34", "uid": "601180", "west": 70.0}, {"awards": "1144176 Lyons, W. Berry", "bounds_geometry": ["POLYGON((162.250099 -77.719928,162.2519358 -77.719928,162.2537726 -77.719928,162.2556094 -77.719928,162.2574462 -77.719928,162.259283 -77.719928,162.2611198 -77.719928,162.2629566 -77.719928,162.2647934 -77.719928,162.2666302 -77.719928,162.268467 -77.719928,162.268467 -77.7201251,162.268467 -77.7203222,162.268467 -77.7205193,162.268467 -77.7207164,162.268467 -77.7209135,162.268467 -77.7211106,162.268467 -77.7213077,162.268467 -77.7215048,162.268467 -77.7217019,162.268467 -77.721899,162.2666302 -77.721899,162.2647934 -77.721899,162.2629566 -77.721899,162.2611198 -77.721899,162.259283 -77.721899,162.2574462 -77.721899,162.2556094 -77.721899,162.2537726 -77.721899,162.2519358 -77.721899,162.250099 -77.721899,162.250099 -77.7217019,162.250099 -77.7215048,162.250099 -77.7213077,162.250099 -77.7211106,162.250099 -77.7209135,162.250099 -77.7207164,162.250099 -77.7205193,162.250099 -77.7203222,162.250099 -77.7201251,162.250099 -77.719928))"], "date_created": "Tue, 07 May 2019 00:00:00 GMT", "description": "Blood Falls is a hypersaline, iron\u2010rich discharge at the terminus of the Taylor Glacier in the McMurdo Dry Valleys, Antarctica. In November 2014, brine in a conduit within the glacier was penetrated and sampled using clean\u2010entry techniques and a thermoelectric melting probe called the IceMole. We analyzed the englacial brine sample for filterable iron (fFe), total Fe, major cations and anions, nutrients, organic carbon, and perchlorate. In addition, aliquots were analyzed for minor and trace elements and isotopes including \u03b4D and \u03b418O of water, \u03b434S and \u03b418O of sulfate, 234U, 238U, \u03b411B, 87Sr/86Sr, and \u03b481Br. These measurements were made in order to (1) determine the source and geochemical evolution of the brine and (2) compare the chemistry of the brine to that of nearby hypersaline lake waters and previous supraglacially sampled collections of Blood Falls outflow that were interpreted as end\u2010member brines.", "east": 162.268467, "geometry": ["POINT(162.259283 -77.7209135)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Subglacial Brine", "locations": "Antarctica", "north": -77.719928, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Lyons, W. Berry; Gardner, Christopher B.", "project_titles": "Collaborative Research: MIDGE: Minimally Invasive Direct Glacial Exploration of Biogeochemistry, Hydrology and Glaciology of Blood Falls, McMurdo Dry Valleys", "projects": [{"proj_uid": "p0000002", "repository": "USAP-DC", "title": "Collaborative Research: MIDGE: Minimally Invasive Direct Glacial Exploration of Biogeochemistry, Hydrology and Glaciology of Blood Falls, McMurdo Dry Valleys"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.721899, "title": "The Geochemistry of englacial brine from Taylor Glacier, Antarctica.", "uid": "601179", "west": 162.250099}, {"awards": "1822289 Vernet, Maria", "bounds_geometry": ["POLYGON((-59.402149 -62.131908,-58.9639887 -62.131908,-58.5258284 -62.131908,-58.0876681 -62.131908,-57.6495078 -62.131908,-57.2113475 -62.131908,-56.7731872 -62.131908,-56.3350269 -62.131908,-55.8968666 -62.131908,-55.4587063 -62.131908,-55.020546 -62.131908,-55.020546 -62.384829,-55.020546 -62.63775,-55.020546 -62.890671,-55.020546 -63.143592,-55.020546 -63.396513,-55.020546 -63.649434,-55.020546 -63.902355,-55.020546 -64.155276,-55.020546 -64.408197,-55.020546 -64.661118,-55.4587063 -64.661118,-55.8968666 -64.661118,-56.3350269 -64.661118,-56.7731872 -64.661118,-57.2113475 -64.661118,-57.6495078 -64.661118,-58.0876681 -64.661118,-58.5258284 -64.661118,-58.9639887 -64.661118,-59.402149 -64.661118,-59.402149 -64.408197,-59.402149 -64.155276,-59.402149 -63.902355,-59.402149 -63.649434,-59.402149 -63.396513,-59.402149 -63.143592,-59.402149 -62.890671,-59.402149 -62.63775,-59.402149 -62.384829,-59.402149 -62.131908))"], "date_created": "Mon, 29 Apr 2019 00:00:00 GMT", "description": "Marine ecosystems under large ice shelves are thought to contain sparse, low-diversity plankton and seafloor communities due the low supply of food from productive sunlight waters. Past studies have shown sub-ice shelf ecosystems to change in response to altered oceanographic processes resulting from ice-shelve retreat. However, information on community changes and ecosystem structure under ice shelves are limited because sub-ice-shelf ecosystems have either been sampled many years after ice-shelf breakout, or have been sampled through small boreholes, yielding extremely limited spatial information. The recent breakout of the A-68 iceberg from the Larsen C ice shelf in the western Weddell Sea provides an opportunity to use a ship-based study to evaluate benthic communities and water column characteristics in an area recently vacated by a large overlying ice shelf. The opportunity will allow spatial assessments at the time of transition from an under ice-shelf environment to one initially exposed to conditions more typical of a coastal Antarctic marine setting. \r\n\r\n\r\n\r\nThis RAPID project will help determine the state of a coastal Antarctic ecosystem newly exposed from ice-shelf cover and will aid in understanding of rates of community change during transition. The project will conduct a 10-day field program, allowing contrasts to be made of phytoplankton and seafloor megafaunal communities in areas recently exposed by ice-shelf loss to areas exposed for many decades. The project will be undertaken in a collaborative manner with the South Korean Antarctic Agency, KOPRI, by participating in a cruise in March/May 2018. Combining new information in the area of Larsen C with existing observations after the Larsen A and B ice shelf breakups further to the north, the project is expected to generate a dataset that can elucidate fundamental processes of planktonic and benthic community development in transition from food-poor to food-rich ecosystems. The project will provide field experience to two graduate students, a post-doctoral associate and an undergraduate student. Material from the project will be incorporated into graduate courses and the project will communicate daily work and unfolding events through social media and blogs while they explore this area of the world that is largely underexplored.", "east": -55.020546, "geometry": ["POINT(-57.2113475 -63.396513)"], "keywords": "Antarctica; Biota; Chlorophyll; CTD; Glacier; Iceberg; Ice Shelf; Larsen C Ice Shelf; Oceans; Physical Oceanography; Phytoplankton; Sample Location; Sea Ice; Southern Ocean; Station List", "locations": "Antarctica; Southern Ocean; Larsen C Ice Shelf", "north": -62.131908, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Pan, B. Jack; Vernet, Maria", "project_titles": "RAPID: Collaborative Research: Marine Ecosystem Response to the Larsen C Ice-Shelf Breakout: \"Time zero\"", "projects": [{"proj_uid": "p0010029", "repository": "USAP-DC", "title": "RAPID: Collaborative Research: Marine Ecosystem Response to the Larsen C Ice-Shelf Breakout: \"Time zero\""}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.661118, "title": "CTD stations and logs for Araon 2018 ANA08D expedition to Larson C", "uid": "601178", "west": -59.402149}, {"awards": "9909367 Leventer, Amy", "bounds_geometry": ["POLYGON((57 -66,57.3 -66,57.6 -66,57.9 -66,58.2 -66,58.5 -66,58.8 -66,59.1 -66,59.4 -66,59.7 -66,60 -66,60 -66.1,60 -66.2,60 -66.3,60 -66.4,60 -66.5,60 -66.6,60 -66.7,60 -66.8,60 -66.9,60 -67,59.7 -67,59.4 -67,59.1 -67,58.8 -67,58.5 -67,58.2 -67,57.9 -67,57.6 -67,57.3 -67,57 -67,57 -66.9,57 -66.8,57 -66.7,57 -66.6,57 -66.5,57 -66.4,57 -66.3,57 -66.2,57 -66.1,57 -66))"], "date_created": "Thu, 25 Apr 2019 00:00:00 GMT", "description": "This data set describes diatom assemblages and abundances from two sediment cores retrieved from Edward VIII Gulf. The assemblages are used to reconstruct paleoceanographic conditions throughout the Holocene.", "east": 60.0, "geometry": ["POINT(58.5 -66.5)"], "keywords": "Antarctica; Biota; Diatom; East Antarctica; Microscopy; NBP0101; Oceans; Paleoceanography; Paleoclimate; R/v Nathaniel B. Palmer; Sediment Corer", "locations": "East Antarctica; Antarctica", "north": -66.0, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Leventer, Amy", "project_titles": "Quaternary Glacial History and Paleoenvironments of the East Antarctic Margin", "projects": [{"proj_uid": "p0000609", "repository": "USAP-DC", "title": "Quaternary Glacial History and Paleoenvironments of the East Antarctic Margin"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -67.0, "title": "Diatom assemblages from Edward VIII Gulf, Kemp Coast, East Antarctica", "uid": "601177", "west": 57.0}, {"awards": "1245821 Brook, Edward J.; 1246148 Severinghaus, Jeffrey; 1245659 Petrenko, Vasilii; 0739766 Brook, Edward J.", "bounds_geometry": ["POLYGON((161.68 -77.73,161.7 -77.73,161.72 -77.73,161.74 -77.73,161.76 -77.73,161.78 -77.73,161.8 -77.73,161.82 -77.73,161.84 -77.73,161.86 -77.73,161.88 -77.73,161.88 -77.734,161.88 -77.738,161.88 -77.742,161.88 -77.746,161.88 -77.75,161.88 -77.754,161.88 -77.758,161.88 -77.762,161.88 -77.766,161.88 -77.77,161.86 -77.77,161.84 -77.77,161.82 -77.77,161.8 -77.77,161.78 -77.77,161.76 -77.77,161.74 -77.77,161.72 -77.77,161.7 -77.77,161.68 -77.77,161.68 -77.766,161.68 -77.762,161.68 -77.758,161.68 -77.754,161.68 -77.75,161.68 -77.746,161.68 -77.742,161.68 -77.738,161.68 -77.734,161.68 -77.73))"], "date_created": "Tue, 23 Apr 2019 00:00:00 GMT", "description": "Noble gas data from Taylor Glacier for mean ocean temperature reconstruction during the Younger Dryas. Also includes field measurements of methane and standard deviations of replicate CO2 measurements from WAIS Divide. ", "east": 161.88, "geometry": ["POINT(161.78 -77.75)"], "keywords": "Antarctica; CO2; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core; Ice Core Records; Methane; Noble Gas; Noble Gas Isotopes; Snow/ice; Snow/Ice; Taylor Glacier; Younger Dryas", "locations": "Taylor Glacier; Antarctica", "north": -77.73, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Shackleton, Sarah", "project_titles": "Collaborative Research: The Taylor Glacier, Antarctica, Horizontal Ice Core: Exploring changes in the Natural Methane Budget in a Warming World and Expanding the Paleo-archive", "projects": [{"proj_uid": "p0000283", "repository": "USAP-DC", "title": "Collaborative Research: The Taylor Glacier, Antarctica, Horizontal Ice Core: Exploring changes in the Natural Methane Budget in a Warming World and Expanding the Paleo-archive"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Taylor Dome Ice Core", "south": -77.77, "title": "Taylor Glacier Noble Gases - Younger Dryas", "uid": "601176", "west": 161.68}, {"awards": "1543031 Ivany, Linda", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Mon, 22 Apr 2019 00:00:00 GMT", "description": "GENESIS global circulation model (GCM) outputs from a middle Eocene simulation parameterized with 2000 ppm pCO2, high obliquity, and no Antarctic ice.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Atmosphere; Climate Model; Computer Model; Eocene; Genesis; Global Circulation Model; Modeling; Model Output; Seasonality; Temperature", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Judd, Emily", "project_titles": "Seasonality, Summer Cooling, and Calibrating the Approach of the Icehouse in Late Eocene Antarctica", "projects": [{"proj_uid": "p0010025", "repository": "USAP-DC", "title": "Seasonality, Summer Cooling, and Calibrating the Approach of the Icehouse in Late Eocene Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "NetCDF outputs from middle Eocene climate simulation using the GENESIS global circulation model", "uid": "601175", "west": -180.0}, {"awards": "1543031 Ivany, Linda", "bounds_geometry": ["POLYGON((-57 -64,-56.9 -64,-56.8 -64,-56.7 -64,-56.6 -64,-56.5 -64,-56.4 -64,-56.3 -64,-56.2 -64,-56.1 -64,-56 -64,-56 -64.05,-56 -64.1,-56 -64.15,-56 -64.2,-56 -64.25,-56 -64.3,-56 -64.35,-56 -64.4,-56 -64.45,-56 -64.5,-56.1 -64.5,-56.2 -64.5,-56.3 -64.5,-56.4 -64.5,-56.5 -64.5,-56.6 -64.5,-56.7 -64.5,-56.8 -64.5,-56.9 -64.5,-57 -64.5,-57 -64.45,-57 -64.4,-57 -64.35,-57 -64.3,-57 -64.25,-57 -64.2,-57 -64.15,-57 -64.1,-57 -64.05,-57 -64))"], "date_created": "Mon, 22 Apr 2019 00:00:00 GMT", "description": "Serially-sampled high-resolution oxygen isotope data from middle Eocene (~42 Ma) bivalves preserved within the La Meseta Formation, Seymour Island, Antarctica.", "east": -56.0, "geometry": ["POINT(-56.5 -64.25)"], "keywords": "Antarctica; Biota; Bivalves; Cucullaea; Eocene; Glaciers/ice Sheet; Glaciers/Ice Sheet; Isotope Data; La Meseta Formation; Mass Spectrometer; Mass Spectrometry; Oxygen Isotope; Paleotemperature; Retrotapes; Seasonality; Seymour Island", "locations": "Seymour Island; Antarctica; La Meseta Formation", "north": -64.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Judd, Emily", "project_titles": "Seasonality, Summer Cooling, and Calibrating the Approach of the Icehouse in Late Eocene Antarctica", "projects": [{"proj_uid": "p0010025", "repository": "USAP-DC", "title": "Seasonality, Summer Cooling, and Calibrating the Approach of the Icehouse in Late Eocene Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.5, "title": "Oxygen isotope data from serially sampled Eocene bivalves from the La Meseta Fm., Seymour Island, Antarctica", "uid": "601174", "west": -57.0}, {"awards": "1543031 Ivany, Linda", "bounds_geometry": ["POLYGON((-57 -64,-56.9 -64,-56.8 -64,-56.7 -64,-56.6 -64,-56.5 -64,-56.4 -64,-56.3 -64,-56.2 -64,-56.1 -64,-56 -64,-56 -64.05,-56 -64.1,-56 -64.15,-56 -64.2,-56 -64.25,-56 -64.3,-56 -64.35,-56 -64.4,-56 -64.45,-56 -64.5,-56.1 -64.5,-56.2 -64.5,-56.3 -64.5,-56.4 -64.5,-56.5 -64.5,-56.6 -64.5,-56.7 -64.5,-56.8 -64.5,-56.9 -64.5,-57 -64.5,-57 -64.45,-57 -64.4,-57 -64.35,-57 -64.3,-57 -64.25,-57 -64.2,-57 -64.15,-57 -64.1,-57 -64.05,-57 -64))"], "date_created": "Mon, 22 Apr 2019 00:00:00 GMT", "description": "Serially-sampled high-resolution organic carbon isotope data from middle Eocene (~42 Ma) driftwood preserved within the La Meseta Formation, Seymour Island, Antarctica.", "east": -56.0, "geometry": ["POINT(-56.5 -64.25)"], "keywords": "Antarctica; Carbon Isotopes; Driftwood; Eocene; Geochemistry; Geochronology; Isotope Data; La Meseta Formation; Mass Spectrometer; Mass Spectrometry; Organic Carbon Isotopes; Seasonality; Seymour Island; Wood", "locations": "La Meseta Formation; Antarctica; Seymour Island", "north": -64.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Judd, Emily", "project_titles": "Seasonality, Summer Cooling, and Calibrating the Approach of the Icehouse in Late Eocene Antarctica", "projects": [{"proj_uid": "p0010025", "repository": "USAP-DC", "title": "Seasonality, Summer Cooling, and Calibrating the Approach of the Icehouse in Late Eocene Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.5, "title": "Organic carbon isotope data from serially sampled Eocene driftwood from the La Meseta Fm., Seymour Island, Antarctica", "uid": "601173", "west": -57.0}, {"awards": "0944191 Taylor, Kendrick; 0944197 Waddington, Edwin", "bounds_geometry": ["POLYGON((-115 -80,-114.5 -80,-114 -80,-113.5 -80,-113 -80,-112.5 -80,-112 -80,-111.5 -80,-111 -80,-110.5 -80,-110 -80,-110 -79.9,-110 -79.8,-110 -79.7,-110 -79.6,-110 -79.5,-110 -79.4,-110 -79.3,-110 -79.2,-110 -79.1,-110 -79,-110.5 -79,-111 -79,-111.5 -79,-112 -79,-112.5 -79,-113 -79,-113.5 -79,-114 -79,-114.5 -79,-115 -79,-115 -79.1,-115 -79.2,-115 -79.3,-115 -79.4,-115 -79.5,-115 -79.6,-115 -79.7,-115 -79.8,-115 -79.9,-115 -80))"], "date_created": "Fri, 12 Apr 2019 00:00:00 GMT", "description": "Images of the multi-track electrical data for depths below 1956 m are given in mt_compiled_1958_3406.pdf. Images are approximately to scale. Data for individual sections can be obtained by contacting T.J. Fudge at tjfudge@uw.edu.\r\n\r\nWarm colors are high electrical conductivity. Cool colors are low electrical conductivity. Each track is normalized by subtracting the mean and dividing by the standard deviation. Plotted values are a 3-measurement (3mm) running average. Measurements affected by breaks in the core have been masked out.\r\n\r\nX-axis is approximate horizontal position on the ice core, as measured from left from looking from bottom to top of the core. Y-axis is depth in meters. Title is the tube number. \r\n", "east": -110.0, "geometry": ["POINT(-112.5 -79.5)"], "keywords": "Antarctic; Antarctica; Electrical Conductivity; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice; Ice Core Data; Ice Core Records; Physical Properties; Snow/ice; Snow/Ice; WAIS Divide; WAIS Divide Ice Core; Wais Project; West Antarctic Ice Sheet", "locations": "WAIS Divide; Antarctica; West Antarctic Ice Sheet; Antarctic", "north": -79.0, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Fudge, T. J.; Taylor, Kendrick C.", "project_titles": "Collaborative Research: Establishing the Chronology and Histories of Accumulation and Ice Dynamics for the WAIS Divide Core", "projects": [{"proj_uid": "p0000026", "repository": "USAP-DC", "title": "Collaborative Research: Establishing the Chronology and Histories of Accumulation and Ice Dynamics for the WAIS Divide Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.0, "title": "WAIS Divide Multi Track Electrical Measurements", "uid": "601172", "west": -115.0}, {"awards": "1543412 Reinfelder, John", "bounds_geometry": ["POLYGON((-69.9043 -65.8708,-69.74203 -65.8708,-69.57976 -65.8708,-69.41749 -65.8708,-69.25522 -65.8708,-69.09295 -65.8708,-68.93068 -65.8708,-68.76841 -65.8708,-68.60614 -65.8708,-68.44387 -65.8708,-68.2816 -65.8708,-68.2816 -66.05698,-68.2816 -66.24316,-68.2816 -66.42934,-68.2816 -66.61552,-68.2816 -66.8017,-68.2816 -66.98788,-68.2816 -67.17406,-68.2816 -67.36024,-68.2816 -67.54642,-68.2816 -67.7326,-68.44387 -67.7326,-68.60614 -67.7326,-68.76841 -67.7326,-68.93068 -67.7326,-69.09295 -67.7326,-69.25522 -67.7326,-69.41749 -67.7326,-69.57976 -67.7326,-69.74203 -67.7326,-69.9043 -67.7326,-69.9043 -67.54642,-69.9043 -67.36024,-69.9043 -67.17406,-69.9043 -66.98788,-69.9043 -66.8017,-69.9043 -66.61552,-69.9043 -66.42934,-69.9043 -66.24316,-69.9043 -66.05698,-69.9043 -65.8708))"], "date_created": "Sun, 31 Mar 2019 00:00:00 GMT", "description": "This dataset includes 16S rRNA gene libraries produced from DNA extracted from pooled digestive tracts of Antarctic krill (Euphausia superba) collected in coastal waters west of the Antarctic Peninsula in 2014.", "east": -68.2816, "geometry": ["POINT(-69.09295 -66.8017)"], "keywords": "Antarctica; Biota; Krill; LTER Palmer Station; Microbiome; Oceans; Southern Ocean", "locations": "Antarctica; Southern Ocean", "north": -65.8708, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Reinfelder, John", "project_titles": "Methylmercury in Antarctic Krill Microbiomes", "projects": [{"proj_uid": "p0010023", "repository": "USAP-DC", "title": "Methylmercury in Antarctic Krill Microbiomes"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "LTER", "south": -67.7326, "title": "16S rRNA gene libraries of krill gut microbial communities", "uid": "601171", "west": -69.9043}, {"awards": "1743326 Kingslake, Jonathan", "bounds_geometry": null, "date_created": "Fri, 22 Mar 2019 00:00:00 GMT", "description": "In February 2018, we hosted a workshop on Antarctic Surface Hydrology and Future Ice-shelf Stability at Lamont-Doherty Earth Observatory, Palisades, New York. Funding for the workshop was provided by the\r\nU.S. National Science Foundation (NSF) Antarctic Glaciology Program (award number: 1743326). The\r\naims of the workshop were to: (1) establish the state-of-the-science of Antarctic surface hydrology; (2)\r\nidentify key science questions raised by observations and theoretical studies of Antarctic surface\r\nhydrology, and (3) move the community toward answering these questions by bringing together scientists\r\nwith diverse expertise. The workshop was motivated by the premise that significant gains in our\r\nunderstanding can be made if researchers with interests in this field are provided with an opportunity to\r\ncommunicate and develop collaborations across disciplines.\r\n\r\nHere we report on the organisation, attendance, and structure of the workshop, before summarizing key\r\nscience outcomes, research questions, and future priorities that emerged during the workshop within the\r\nfollowing four themes:\r\n1. Surface melting: controls and observations\r\n2. Water ponding and flow\r\n3. Impact of meltwater on ice-shelf stability\r\n4. Ice-sheet/climate modeling\r\n\r\nFinally, building on the emergent science questions, we propose a framework for prioritizing future work,\r\naimed at understanding and predicting the impact that surface meltwater will have on future Antarctic Ice\r\nSheet mass balance.", "east": null, "geometry": null, "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Hydrology; Ice Sheet Stability; Ice Shelf; Report; Workshop", "locations": "Antarctica", "north": null, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Kingslake, Jonathan; Trusel, Luke; Banwell, Alison; Bell, Robin; Das, Indrani; DeConto, Robert; Tedesco, Marco; Lenaerts, Jan; Schoof, Christian", "project_titles": "Workshop on Antarctic Surface Hydrology and Future Ice-shelf Stability", "projects": [{"proj_uid": "p0010021", "repository": "USAP-DC", "title": "Workshop on Antarctic Surface Hydrology and Future Ice-shelf Stability"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Report on Antarctic surface hydrology workshop, LDEO, 2018", "uid": "601170", "west": null}, {"awards": "1144177 Pettit, Erin", "bounds_geometry": ["POLYGON((161.8 -77.7,161.88 -77.7,161.96 -77.7,162.04 -77.7,162.12 -77.7,162.2 -77.7,162.28 -77.7,162.36 -77.7,162.44 -77.7,162.52 -77.7,162.6 -77.7,162.6 -77.707,162.6 -77.714,162.6 -77.721,162.6 -77.728,162.6 -77.735,162.6 -77.742,162.6 -77.749,162.6 -77.756,162.6 -77.763,162.6 -77.77,162.52 -77.77,162.44 -77.77,162.36 -77.77,162.28 -77.77,162.2 -77.77,162.12 -77.77,162.04 -77.77,161.96 -77.77,161.88 -77.77,161.8 -77.77,161.8 -77.763,161.8 -77.756,161.8 -77.749,161.8 -77.742,161.8 -77.735,161.8 -77.728,161.8 -77.721,161.8 -77.714,161.8 -77.707,161.8 -77.7))"], "date_created": "Tue, 19 Mar 2019 00:00:00 GMT", "description": "The data set contains FLIR thermal imaging of Blood Falls from December 9 through March 25 (power failure). 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See readme for details. 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Impacts of macroalgal-associated gastropods on epiphytic microalgae on the ecologically important Antarctic brown alga Himantothallus grandifolius. Antarctic Science 31: doi:10.1017/S0954102019000014", "east": -63.0, "geometry": ["POINT(-64 -64)"], "keywords": "Antarctica; Benthic; Biota; Macroalgae; Mesograzer; Microscopy; Oceans; Zooplankton", "locations": "Antarctica", "north": -63.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Amsler, Charles", "project_titles": "Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula - continuing", "projects": [{"proj_uid": "p0010016", "repository": "USAP-DC", "title": "Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula - continuing"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.0, "title": "Data from Amsler et al. 2019 Antarctic Science, doi:10.1017/S0954102019000014", "uid": "601159", "west": -65.0}, {"awards": "1443705 Vernet, Maria", "bounds_geometry": ["POLYGON((-63.3 -64.5,-63.17 -64.5,-63.04 -64.5,-62.91 -64.5,-62.78 -64.5,-62.65 -64.5,-62.52 -64.5,-62.39 -64.5,-62.26 -64.5,-62.13 -64.5,-62 -64.5,-62 -64.545,-62 -64.59,-62 -64.635,-62 -64.68,-62 -64.725,-62 -64.77,-62 -64.815,-62 -64.86,-62 -64.905,-62 -64.95,-62.13 -64.95,-62.26 -64.95,-62.39 -64.95,-62.52 -64.95,-62.65 -64.95,-62.78 -64.95,-62.91 -64.95,-63.04 -64.95,-63.17 -64.95,-63.3 -64.95,-63.3 -64.905,-63.3 -64.86,-63.3 -64.815,-63.3 -64.77,-63.3 -64.725,-63.3 -64.68,-63.3 -64.635,-63.3 -64.59,-63.3 -64.545,-63.3 -64.5))"], "date_created": "Wed, 27 Feb 2019 00:00:00 GMT", "description": "Phytoplankton ecology dataset from the FjordEco Project (PLR-1443705)", "east": -62.0, "geometry": ["POINT(-62.65 -64.725)"], "keywords": "Antarctica; Antarctic Peninsula; Biota; Ecology; Fjord; Phytoplankton", "locations": "Antarctic Peninsula; Antarctica; Antarctica", "north": -64.5, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Vernet, Maria; Pan, B. Jack; Manck, Lauren; Forsch, Kiefer", "project_titles": "Collaborative Research: Fjord Ecosystem Structure and Function on the West Antarctic Peninsula - Hotspots of Productivity and Biodiversity? (FjordEco)", "projects": [{"proj_uid": "p0010010", "repository": "USAP-DC", "title": "Collaborative Research: Fjord Ecosystem Structure and Function on the West Antarctic Peninsula - Hotspots of Productivity and Biodiversity? (FjordEco)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "FjordEco", "south": -64.95, "title": "FjordEco Phytoplankton Ecology Dataset in Andvord Bay", "uid": "601158", "west": -63.3}, {"awards": "1443680 Smith, Craig", "bounds_geometry": ["POLYGON((-65 -64,-64.7 -64,-64.4 -64,-64.1 -64,-63.8 -64,-63.5 -64,-63.2 -64,-62.9 -64,-62.6 -64,-62.3 -64,-62 -64,-62 -64.1,-62 -64.2,-62 -64.3,-62 -64.4,-62 -64.5,-62 -64.6,-62 -64.7,-62 -64.8,-62 -64.9,-62 -65,-62.3 -65,-62.6 -65,-62.9 -65,-63.2 -65,-63.5 -65,-63.8 -65,-64.1 -65,-64.4 -65,-64.7 -65,-65 -65,-65 -64.9,-65 -64.8,-65 -64.7,-65 -64.6,-65 -64.5,-65 -64.4,-65 -64.3,-65 -64.2,-65 -64.1,-65 -64))"], "date_created": "Wed, 13 Feb 2019 00:00:00 GMT", "description": "Sediment organic carbon and organic nitrogen content (percent mass) in 6 depth intervals (0-1cm, 1-2cm, 3-4cm, 5-6cm, 7-8cm , 9-10cm) in sediment cores collected by OSIL Megacore (10 cm diameter tubes) along the five-station FjordEco Transect from inner Andvord Bay to the open continental shelf at FOODBANCS Station B. \r\n", "east": -62.0, "geometry": ["POINT(-63.5 -64.5)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Snow/ice; Snow/Ice", "locations": "Antarctica", "north": -64.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Smith, Craig", "project_titles": "Collaborative Research: Fjord Ecosystem Structure and Function on the West Antarctic Peninsula - Hotspots of Productivity and Biodiversity? (FjordEco)", "projects": [{"proj_uid": "p0010010", "repository": "USAP-DC", "title": "Collaborative Research: Fjord Ecosystem Structure and Function on the West Antarctic Peninsula - Hotspots of Productivity and Biodiversity? (FjordEco)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "FjordEco", "south": -65.0, "title": "Fjord-Eco_Sediment_OrgC_OrgN_Data - Craig Smith", "uid": "601157", "west": -65.0}, {"awards": "1824677 Karentz, Deneb", "bounds_geometry": null, "date_created": "Tue, 05 Feb 2019 00:00:00 GMT", "description": "NSF Office of Polar Programs provided funds to support US participation in the Scientific Committee on Antarctic Research (SCAR) Open Science Conference in Davos, Switzerland (June 2018). The data set indicates demographic data (e.g., career status, institution) for travel award recipients. Preference was given to students and other early career scientists, these applicants received 90% of the funds awarded.", "east": null, "geometry": null, "keywords": "Antarctica; Human Dimensions", "locations": "Antarctica", "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Earth Sciences; Antarctic Glaciology; Antarctic Integrated System Science; Antarctic Ocean and Atmospheric Sciences", "persons": "Karentz, Deneb", "project_titles": "Group Travel Award: XXXVth SCAR Open Science Conference", "projects": [{"proj_uid": "p0010008", "repository": "USAP-DC", "title": "Group Travel Award: XXXVth SCAR Open Science Conference"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "2018 SCAR OSC Travel Award Data", "uid": "601156", "west": null}, {"awards": "1443394 Pollard, David", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Mon, 04 Feb 2019 00:00:00 GMT", "description": "The dataset consists of two tar files for two distinct sets of simulations. Each tar file contains a number of Netcdf files with model output for one simulation each, and also contains a DIF file (Directory Interchange Format, in xml form) with information on that part of the dataset.\r\n\r\nSet 1:\r\n\r\nThere are 4 Netcdf files with output from the PSU 3D Antarctic ice sheet model including \r\n ice melange, showing role of melange in potentially providing buttressing and \r\n possibly slowing down ice retreat in strong climate warming scenarios.\r\n \r\nSet two:\r\n\r\nThere are 2 Netcdf files with output from the PSU 3D Antarctic ice sheet model, for two future warming scenarios RCP4.5 and RCP8.5, contributing to oceanic meltwater discharge fields for future climate and ocean model simulations performed at Univ. Massachusetts by other PIs on the NSF project.\r\n \r\nMore details on file names and model fields is provided in \"Data Section\" of the Readme file.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctic; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Sheet; Ice Sheet Model; Meltwater; Model Data; Modeling; Model Output", "locations": "Antarctic; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Pollard, David", "project_titles": "Collaborative Research: Assessing the Global Climate Response to Melting of the Antarctic Ice Sheet", "projects": [{"proj_uid": "p0010007", "repository": "USAP-DC", "title": "Collaborative Research: Assessing the Global Climate Response to Melting of the Antarctic Ice Sheet"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Antarctic Ice Sheet simulations for role of freshwater in future warming scenarios", "uid": "601154", "west": -180.0}, {"awards": "1704236 Karentz, Deneb", "bounds_geometry": null, "date_created": "Mon, 04 Feb 2019 00:00:00 GMT", "description": "NSF Office of Polar Programs provided funds to support US participation in the XIIth Scientific Committee on Antarctic Research (SCAR) International Biology Symposium in Leuven, The Netherlands (July 2017). The data set indicates demographic data (e.g., career status, institution) for travel award recipients. Preference was given to students and other early career scientists, these applicants received 83% for the funds awarded.", "east": null, "geometry": null, "keywords": "Antarctica; Human Dimensions", "locations": "Antarctica", "north": null, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Karentz, Deneb", "project_titles": "Group Travel Award: XIIth SCAR International Biology Symposium", "projects": [{"proj_uid": "p0010006", "repository": "USAP-DC", "title": "Group Travel Award: XIIth SCAR International Biology Symposium"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "2017 SCAR Biology Symposium travel award data", "uid": "601155", "west": null}, {"awards": "1656344 Bowman, Jeff", "bounds_geometry": ["POLYGON((-64.1 -64.75,-64.08 -64.75,-64.06 -64.75,-64.04 -64.75,-64.02 -64.75,-64 -64.75,-63.98 -64.75,-63.96 -64.75,-63.94 -64.75,-63.92 -64.75,-63.9 -64.75,-63.9 -64.775,-63.9 -64.8,-63.9 -64.825,-63.9 -64.85,-63.9 -64.875,-63.9 -64.9,-63.9 -64.925,-63.9 -64.95,-63.9 -64.975,-63.9 -65,-63.92 -65,-63.94 -65,-63.96 -65,-63.98 -65,-64 -65,-64.02 -65,-64.04 -65,-64.06 -65,-64.08 -65,-64.1 -65,-64.1 -64.975,-64.1 -64.95,-64.1 -64.925,-64.1 -64.9,-64.1 -64.875,-64.1 -64.85,-64.1 -64.825,-64.1 -64.8,-64.1 -64.775,-64.1 -64.75))"], "date_created": "Mon, 04 Feb 2019 00:00:00 GMT", "description": "This dataset contains bacterial production, primary production, chlorophyll biomass, and photosynthetic parameters for samples archived in NCBI SRA as SUB4579142.", "east": -63.9, "geometry": ["POINT(-64 -64.875)"], "keywords": "Antarctic; Antarctica; Bacteria; Bacteria Production; Biota; Chlorophyll; LTER Palmer Station; Primary Production; Sea Ice; Southern Ocean", "locations": "Antarctica; Southern Ocean; Antarctic", "north": -64.75, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Bowman, Jeff", "project_titles": "A Preliminary Assessment of the Influence of Ice Cover on Microbial Carbon and Energy Acquisition during the Antarctic Winter-spring Seasonal Transition", "projects": [{"proj_uid": "p0010003", "repository": "USAP-DC", "title": "A Preliminary Assessment of the Influence of Ice Cover on Microbial Carbon and Energy Acquisition during the Antarctic Winter-spring Seasonal Transition"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.0, "title": "Metadata accompanying BioProject SUB4579142", "uid": "601153", "west": -64.1}, {"awards": "1443710 Severinghaus, Jeffrey", "bounds_geometry": ["POINT(0 -90)"], "date_created": "Sat, 02 Feb 2019 00:00:00 GMT", "description": "This data set includes major atmospheric gas and gas isotope data from the SPICECORE project, which recovered a 1750-m ice core at the South Pole in 2015. 15N, 18O of O2, O2/N2, and Ar/N2 are included.", "east": 0.0, "geometry": ["POINT(0 -90)"], "keywords": "Antarctica; Antarctic Ice Sheet; Chemistry:gas; Chemistry:Gas; Chemistry:ice; Chemistry:Ice; Delta 18O; Dole Effect; Firn Thickness; Gas Isotopes; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Gravitational Settling; Ice; Ice Core Chemistry; Ice Core Data; Ice Core Gas Records; Ice Core Records; Inert Gases; Nitrogen; Nitrogen Isotopes; Oxygen; Oxygen Isotope; Snow/ice; Snow/Ice; South Pole; SPICEcore", "locations": "South Pole; Antarctic Ice Sheet; Antarctica", "north": -90.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Severinghaus, Jeffrey P.", "project_titles": "Collaborative Research: Inert Gas and Methane Based Climate Records throughout the South Pole Deep Ice Core", "projects": [{"proj_uid": "p0010005", "repository": "USAP-DC", "title": "Collaborative Research: Inert Gas and Methane Based Climate Records throughout the South Pole Deep Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -90.0, "title": "South Pole (SPICECORE) 15N, 18O, O2/N2 and Ar/N2", "uid": "601152", "west": 0.0}, {"awards": "1048343 Warny, Sophie", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Fri, 01 Feb 2019 00:00:00 GMT", "description": "Thanks to grant # U.S. National Science Foundation ANT-1048343, our group was selected to study about 700 of the recently-acquired sediment samples in Antarctica, covering ~9 regions and geological time frames ranging from the Paleocene to today. The samples were processed for palynological analyses and the slides are curated at the LSU CENEX center.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Glaciology; Marine Geoscience; Marine Sediments; Microscope; Microscopy; Paleoclimate; Pollen", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Warny, Sophie", "project_titles": "CAREER: Deciphering Antarctic Climate Variability during the Temperate/Polar Transition and Improving Climate Change Literacy in Louisiana through a Companion Outreach Program", "projects": [{"proj_uid": "p0000311", "repository": "USAP-DC", "title": "CAREER: Deciphering Antarctic Climate Variability during the Temperate/Polar Transition and Improving Climate Change Literacy in Louisiana through a Companion Outreach Program"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Palynological samples", "uid": "601151", "west": -180.0}, {"awards": "1341485 Woods, H. Arthur", "bounds_geometry": ["POINT(166.666 -77.8499966)"], "date_created": "Sun, 06 Jan 2019 00:00:00 GMT", "description": "Data used in Lane, SJ, CM Shishido, AL Moran, BW Tobalske, CP Arango, HA Woods (2017) Upper limits to body size imposed by respiratory-structural trade-offs in Antarctic pycnogonids. Proceedings of the Royal Society B 284, No. 1865, p. 20171779, DOI: 10.1098/rspb.2017.1779. File includes data on species identification, body mass, leg dimensions, oxygen gradients across the cuticle, and metabolic rate. ", "east": 166.666, "geometry": ["POINT(166.666 -77.8499966)"], "keywords": "Antarctica; Biota; Body Size; Cuticle; Metabolic Rate; Oxygen; Polar Gigantism; Respiration; Size Limits; Southern Ocean; Temperature", "locations": "Southern Ocean; Antarctica", "north": -77.8499966, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Lane, Steven J.; Moran, Amy; Shishido, Caitlin; Woods, H. Arthur", "project_titles": "Collaborative Research: Body Size, Oxygen, and Vulnerability to Climate Change in Antarctic Pycnogonida", "projects": [{"proj_uid": "p0000007", "repository": "USAP-DC", "title": "Collaborative Research: Body Size, Oxygen, and Vulnerability to Climate Change in Antarctic Pycnogonida"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.8499966, "title": "Size scaling of oxygen physiology and metabolic rate of Antarctic sea spiders", "uid": "601150", "west": 166.666}, {"awards": "1341485 Woods, H. Arthur", "bounds_geometry": ["POINT(166.666 -77.8499966)"], "date_created": "Sun, 06 Jan 2019 00:00:00 GMT", "description": "Data used in Lane, SJ, BW Tobalske, AL Moran, CM Shishido, HA Woods (2018) Costs of epibionts on Antarctic sea spiders. Marine Biology 165, 137 https://doi.org/10.1007/s00227-018-3389-9. Data sets include (1) measurements of drag on individual sea spiders with or without epibiotic barnacles and other fouling; (2) data on locomotion by fouled and unfouled sea spiders; (3) functional diffusion coefficients of oxygen through fouled and unfouled cuticle; and (4) levels of oxygen at the cuticle surface of fouled and unfouled individuals.", "east": 166.666, "geometry": ["POINT(166.666 -77.8499966)"], "keywords": "Antarctica; Barnacles; Biota; Cuticle; Epibionts; Fouling; Grooming; Locomotion; Oxygen; Respiration", "locations": "Antarctica", "north": -77.8499966, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Lane, Steven J.; Tobalske, Bret; Moran, Amy; Shishido, Caitlin; Woods, H. Arthur", "project_titles": "Collaborative Research: Body Size, Oxygen, and Vulnerability to Climate Change in Antarctic Pycnogonida", "projects": [{"proj_uid": "p0000007", "repository": "USAP-DC", "title": "Collaborative Research: Body Size, Oxygen, and Vulnerability to Climate Change in Antarctic Pycnogonida"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.8499966, "title": "Physiological, biomechanical, and locomotory data on Antarctic sea spiders fouled and unfouled with epibionts", "uid": "601149", "west": 166.666}, {"awards": "1313826 Orsi, Alejandro", "bounds_geometry": ["POLYGON((119 -66,119.3 -66,119.6 -66,119.9 -66,120.2 -66,120.5 -66,120.8 -66,121.1 -66,121.4 -66,121.7 -66,122 -66,122 -66.1,122 -66.2,122 -66.3,122 -66.4,122 -66.5,122 -66.6,122 -66.7,122 -66.8,122 -66.9,122 -67,121.7 -67,121.4 -67,121.1 -67,120.8 -67,120.5 -67,120.2 -67,119.9 -67,119.6 -67,119.3 -67,119 -67,119 -66.9,119 -66.8,119 -66.7,119 -66.6,119 -66.5,119 -66.4,119 -66.3,119 -66.2,119 -66.1,119 -66))"], "date_created": "Mon, 24 Dec 2018 00:00:00 GMT", "description": "An array of three moorings (M1-M3) with current meters, temperature, conductivity, and pressure (TCP) recorders were deployed along the eastern flank of the continental shelf off Sabrina Coast, at the main path of the Antarctic Coastal Current indicated by the uCTD data collected earlier during the cruise.\r\n\r\nThese three US mooring were deployed at the 625-m (M1), 620-m (M2) and 1051-m (M3) isobaths.\r\n M1 was recovered on 25 February 2014, with a full data return from all of its instruments; whereas M2 and M3 were recovered in early 2015 on board of the Australian RVI Aurora Australis next year (cruise AU1402).\r\n\r\nThe location and schematics of the mooring array design is described below, and also provided among the uploaded files.\r\n", "east": 122.0, "geometry": ["POINT(120.5 -66.5)"], "keywords": "Antarctica; Au1402; Mooring; NBP1402; Oceans; Ocean Temperature; Physical Oceanography; R/v Aurora Australis; R/v Nathaniel B. Palmer; Sabrina Coast; Salinity; Southern Ocean; Temperature", "locations": "Southern Ocean; Antarctica; Sabrina Coast", "north": -66.0, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Orsi, Alejandro", "project_titles": "Collaborative Research: Totten Glacier System and the Marine Record of Cryosphere - Ocean Dynamics", "projects": [{"proj_uid": "p0000008", "repository": "USAP-DC", "title": "Collaborative Research: Totten Glacier System and the Marine Record of Cryosphere - Ocean Dynamics"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -67.0, "title": "AU1402 mooring data", "uid": "601148", "west": 119.0}, {"awards": "1143833 Orsi, Alejandro", "bounds_geometry": ["POLYGON((119 -66,119.3 -66,119.6 -66,119.9 -66,120.2 -66,120.5 -66,120.8 -66,121.1 -66,121.4 -66,121.7 -66,122 -66,122 -66.1,122 -66.2,122 -66.3,122 -66.4,122 -66.5,122 -66.6,122 -66.7,122 -66.8,122 -66.9,122 -67,121.7 -67,121.4 -67,121.1 -67,120.8 -67,120.5 -67,120.2 -67,119.9 -67,119.6 -67,119.3 -67,119 -67,119 -66.9,119 -66.8,119 -66.7,119 -66.6,119 -66.5,119 -66.4,119 -66.3,119 -66.2,119 -66.1,119 -66))"], "date_created": "Mon, 24 Dec 2018 00:00:00 GMT", "description": "Underway Salinity (Conductivity), Temperature, Depth (Pressure) profiles from AU1402, final, reduced, quality control version. Data are reported as an ascii table suitable for import to Ocean Data View. ", "east": 122.0, "geometry": ["POINT(120.5 -66.5)"], "keywords": "Antarctica; CTD Data; NBP1402; Ocean Temperature; Physical Oceanography; Sabrina Coast; Salinity; Southern Ocean; Temperature; Underway CTD", "locations": "Sabrina Coast; Southern Ocean; Antarctica", "north": -66.0, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Orsi, Alejandro", "project_titles": "Collaborative Research: Totten Glacier System and the Marine Record of Cryosphere - Ocean Dynamics", "projects": [{"proj_uid": "p0000008", "repository": "USAP-DC", "title": "Collaborative Research: Totten Glacier System and the Marine Record of Cryosphere - Ocean Dynamics"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -67.0, "title": "AU1402 Final UCTD data", "uid": "601147", "west": 119.0}, {"awards": "1143833 Orsi, Alejandro", "bounds_geometry": ["POLYGON((117 -64,119.9 -64,122.8 -64,125.7 -64,128.6 -64,131.5 -64,134.4 -64,137.3 -64,140.2 -64,143.1 -64,146 -64,146 -64.4,146 -64.8,146 -65.2,146 -65.6,146 -66,146 -66.4,146 -66.8,146 -67.2,146 -67.6,146 -68,143.1 -68,140.2 -68,137.3 -68,134.4 -68,131.5 -68,128.6 -68,125.7 -68,122.8 -68,119.9 -68,117 -68,117 -67.6,117 -67.2,117 -66.8,117 -66.4,117 -66,117 -65.6,117 -65.2,117 -64.8,117 -64.4,117 -64))"], "date_created": "Sun, 23 Dec 2018 00:00:00 GMT", "description": "Underway Salinity (Conductivity), Temperature, Depth (Pressure) profiles from NBP1402, final, reduced, quality control version. Data are reported as an ascii table suitable for import to Ocean Data View. ", "east": 146.0, "geometry": ["POINT(131.5 -66)"], "keywords": "Antarctica; CTD Data; NBP1402; Oceans; Ocean Temperature; Physical Oceanography; R/v Nathaniel B. Palmer; Sabrina Coast; Salinity; Southern Ocean; Temperature", "locations": "Sabrina Coast; Antarctica; Southern Ocean", "north": -64.0, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Orsi, Alejandro", "project_titles": "Collaborative Research: Totten Glacier System and the Marine Record of Cryosphere - Ocean Dynamics", "projects": [{"proj_uid": "p0000008", "repository": "USAP-DC", "title": "Collaborative Research: Totten Glacier System and the Marine Record of Cryosphere - Ocean Dynamics"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -68.0, "title": "NBP1402 Final UCTD data", "uid": "601146", "west": 117.0}, {"awards": "1341485 Woods, H. Arthur", "bounds_geometry": ["POLYGON((163.85 -77.6,164.134 -77.6,164.418 -77.6,164.702 -77.6,164.986 -77.6,165.27 -77.6,165.554 -77.6,165.838 -77.6,166.122 -77.6,166.406 -77.6,166.69 -77.6,166.69 -77.624,166.69 -77.648,166.69 -77.672,166.69 -77.696,166.69 -77.72,166.69 -77.744,166.69 -77.768,166.69 -77.792,166.69 -77.816,166.69 -77.84,166.406 -77.84,166.122 -77.84,165.838 -77.84,165.554 -77.84,165.27 -77.84,164.986 -77.84,164.702 -77.84,164.418 -77.84,164.134 -77.84,163.85 -77.84,163.85 -77.816,163.85 -77.792,163.85 -77.768,163.85 -77.744,163.85 -77.72,163.85 -77.696,163.85 -77.672,163.85 -77.648,163.85 -77.624,163.85 -77.6))"], "date_created": "Sat, 22 Dec 2018 00:00:00 GMT", "description": "Raw data from Lane, SJ, AL Moran, CM Shishido, BW Tobalske, HA Woods (2018) Cuticular gas exchange by Antarctic sea spiders. Journal of Experimental Biology. jeb.177568 doi: 10.1242/jeb.177568.\r\n\r\nThe file contains data on pore morphology, cuticle thickness, oxygen gradients across the cuticle, and estimated resistances of the cuticle to oxygen flux. Most of the sea spiders were collected near McMurdo Station, with a few extras collected at New Harbor, Antarctica.", "east": 166.69, "geometry": ["POINT(165.27 -77.72)"], "keywords": "Antarctica; Benthos; Biota; Body Size; Cuticle; McMurdo Sound; Microelectrodes; Microscope; Microscopy; Oxygen; Pore; Respiration; Sea Spider; Southern Ocean", "locations": "McMurdo Sound; Antarctica; Southern Ocean", "north": -77.6, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Woods, H. Arthur; Arthur Woods, H.", "project_titles": "Collaborative Research: Body Size, Oxygen, and Vulnerability to Climate Change in Antarctic Pycnogonida", "projects": [{"proj_uid": "p0000007", "repository": "USAP-DC", "title": "Collaborative Research: Body Size, Oxygen, and Vulnerability to Climate Change in Antarctic Pycnogonida"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.84, "title": "Cuticle morphology and oxygen gradients of Antarctic sea spiders", "uid": "601145", "west": 163.85}, {"awards": "1425989 Sarmiento, Jorge", "bounds_geometry": ["POLYGON((-180 -20,-144 -20,-108 -20,-72 -20,-36 -20,0 -20,36 -20,72 -20,108 -20,144 -20,180 -20,180 -27,180 -34,180 -41,180 -48,180 -55,180 -62,180 -69,180 -76,180 -83,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -83,-180 -76,-180 -69,-180 -62,-180 -55,-180 -48,-180 -41,-180 -34,-180 -27,-180 -20))"], "date_created": "Fri, 14 Dec 2018 00:00:00 GMT", "description": "This dataset include the budget terms for heat, carbon and phosphate storage tendency in \r\npre-industrial simulation and climate change simulation forced with atmospheric CO2 increasing at a rate of 1% per year run following 120 years of the pre-industrial simulation. \r\nThe results are zonally integrated. The dataset also include the meridional overturning circulation in the control and climate simulations. ", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Anthropogenic Heat; Atmosphere; Carbon Storage; Climate Change; Eddy; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Heat Budget; Modeling; Model Output; Oceans; Paleoclimate; Snow/ice; Snow/Ice; Southern Ocean", "locations": "Antarctica; Southern Ocean", "north": -20.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences; Antarctic Integrated System Science", "persons": "Chen, Haidi", "project_titles": "Southern Ocean Carbon and Climate Observations and Modeling (SOCCOM)", "projects": [{"proj_uid": "p0000197", "repository": "USAP-DC", "title": "Southern Ocean Carbon and Climate Observations and Modeling (SOCCOM)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Model output NOAA GFDL CM2_6 Cant Hant storage", "uid": "601144", "west": -180.0}, {"awards": "1341485 Woods, H. Arthur; 1341476 Moran, Amy", "bounds_geometry": ["POINT(166.67 -77.85)"], "date_created": "Fri, 07 Dec 2018 00:00:00 GMT", "description": "This dataset contains morphometric (mass, surface area, cuticle thickness, cuticle morphometrics) and physiological (oxygen consumption) data for Antarctic pycnognonids collected in McMurdo Sound, Antarctica .", "east": 166.67, "geometry": ["POINT(166.67 -77.85)"], "keywords": "Antarctica; Biomechanics; Biota; Cold Adaptation; McMurdo Sound; Metabolism; Oceans; Oxygen; Pycnogonida; Southern Ocean", "locations": "Antarctica; McMurdo Sound; Southern Ocean", "north": -77.85, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "Moran, Amy; Woods, H. Arthur; Tobalske, Bret", "project_titles": "Collaborative Research: Body Size, Oxygen, and Vulnerability to Climate Change in Antarctic Pycnogonida", "projects": [{"proj_uid": "p0000007", "repository": "USAP-DC", "title": "Collaborative Research: Body Size, Oxygen, and Vulnerability to Climate Change in Antarctic Pycnogonida"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.85, "title": "Physiological and biochemical measurements on Pycnogonida from McMurdo Sound", "uid": "601142", "west": 166.67}, {"awards": "0944201 Hofmann, Gretchen; 1246202 Hofmann, Gretchen", "bounds_geometry": ["POLYGON((163.5281 -77.5715,163.84105 -77.5715,164.154 -77.5715,164.46695 -77.5715,164.7799 -77.5715,165.09285 -77.5715,165.4058 -77.5715,165.71875 -77.5715,166.0317 -77.5715,166.34465 -77.5715,166.6576 -77.5715,166.6576 -77.59928,166.6576 -77.62706,166.6576 -77.65484,166.6576 -77.68262,166.6576 -77.7104,166.6576 -77.73818,166.6576 -77.76596,166.6576 -77.79374,166.6576 -77.82152,166.6576 -77.8493,166.34465 -77.8493,166.0317 -77.8493,165.71875 -77.8493,165.4058 -77.8493,165.09285 -77.8493,164.7799 -77.8493,164.46695 -77.8493,164.154 -77.8493,163.84105 -77.8493,163.5281 -77.8493,163.5281 -77.82152,163.5281 -77.79374,163.5281 -77.76596,163.5281 -77.73818,163.5281 -77.7104,163.5281 -77.68262,163.5281 -77.65484,163.5281 -77.62706,163.5281 -77.59928,163.5281 -77.5715))"], "date_created": "Wed, 05 Dec 2018 00:00:00 GMT", "description": "This dataset consists of measurements made of pH (total scale) and temperature at various sites in McMurdo Sound, Antarctica with autonomous DuraFET\u00ae - based pH sensors. Sensors logged every 4 hours and ran until batteries were exhausted. Sensors were calibrated with water samples following best practices from Dickson et al (2007). Details of select years from this dataset are provided in Kapsenberg et al(2015). ", "east": 166.6576, "geometry": ["POINT(165.09285 -77.7104)"], "keywords": "Antarctica; McMurdo Sound; Mcmurdo Station; Mooring; Oceans; Ocean Temperature; PH; Physical Oceanography; Ross Sea; Sea Surface Temperature; Seawater Measurements; Southern Ocean; Temperature", "locations": "Southern Ocean; Ross Sea; McMurdo Sound; Antarctica", "north": -77.5715, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "Hoshijima, Umihiko; Hofmann, Gretchen; Kapsenberg, Lydia", "project_titles": "Ocean Acidification Seascape: Linking Natural Variability and Anthropogenic changes in pH and Temperature to Performance in Calcifying Antarctic Marine Invertebrates", "projects": [{"proj_uid": "p0000390", "repository": "USAP-DC", "title": "Ocean Acidification Seascape: Linking Natural Variability and Anthropogenic changes in pH and Temperature to Performance in Calcifying Antarctic Marine Invertebrates"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.8493, "title": "Nearshore pH, temperature, (salinity, depth) at mooring sites in McMurdo Sound, Antarctica, Overwinter 2011-2016", "uid": "601141", "west": 163.5281}, {"awards": "1246407 Jenouvrier, Stephanie", "bounds_geometry": ["POLYGON((68.5 -48.5,68.725 -48.5,68.95 -48.5,69.175 -48.5,69.4 -48.5,69.625 -48.5,69.85 -48.5,70.075 -48.5,70.3 -48.5,70.525 -48.5,70.75 -48.5,70.75 -48.65,70.75 -48.8,70.75 -48.95,70.75 -49.1,70.75 -49.25,70.75 -49.4,70.75 -49.55,70.75 -49.7,70.75 -49.85,70.75 -50,70.525 -50,70.3 -50,70.075 -50,69.85 -50,69.625 -50,69.4 -50,69.175 -50,68.95 -50,68.725 -50,68.5 -50,68.5 -49.85,68.5 -49.7,68.5 -49.55,68.5 -49.4,68.5 -49.25,68.5 -49.1,68.5 -48.95,68.5 -48.8,68.5 -48.65,68.5 -48.5))"], "date_created": "Mon, 03 Dec 2018 00:00:00 GMT", "description": "1. Studies of the mechanisms underlying climate-induced population changes are critically needed to better understand and accurately predict population responses to climate change. Long-lived migratory species might be particularly vulnerable to climate change as they are constrained by different climate conditions and energetic requirements during the breeding and non-breeding seasons. Yet, most studies primarily focus on the breeding season of these species life cycle. Environmental conditions experienced in the non-breeding season may have downstream effects on the other stages of the annual life cycle. Not investigating such effects may potentially lead to erroneous inferences about population dynamics.\r\n2. Combining demographic and tracking data collected between 2006 and 2013 at Kerguelen Island on a long-lived migratory seabird, the Black-Browed Albatross (Thalassarche melanophris), we investigated the links between sea surface temperature during the non-breeding season and behavioural and phenological traits (at-sea behaviour and migratory schedules) while accounting for different responses between birds of different sex and reproductive status (previously failed or successful breeders). We then explored whether variation in the foraging behaviour and timing of spring migration influenced subsequent reproductive performance.\r\n3. Our results showed that foraging activity and migratory schedules varied by both sex and reproductive status suggesting different energetic requirements and constraints among individuals. Higher sea surface temperatures during late winter, assumed to reflect poor winter conditions, were associated with an earlier departure from the wintering grounds and an extended pre-breeding period. However, an earlier spring migration and an earlier return to Kerguelen grounds were associated with a lower breeding success.\r\n4. Our results highlighted that behaviour during some periods of the non-breeding season, particularly towards the end of the wintering period and the pre-breeding period, had a significant effect on the subsequent reproductive success. Therefore caution needs to be given to all stages of the annual cycle when predicting the influence of climate on population dynamics.", "east": 70.75, "geometry": ["POINT(69.625 -49.25)"], "keywords": "Albatross; Animal Behavior Observation; Antarctica; Biota; Birds; Black-Browed Albatross (thalassarche Melanophris); Field Investigations; Foraging; Kerguelen Island; Ocean Island/plateau; Ocean Island/Plateau; Southern Ocean", "locations": "Antarctica; Southern Ocean; Kerguelen Island", "north": -48.5, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Jenouvrier, Stephanie", "project_titles": "Linking Foraging Behaviors to Demography to understand Albatrosses Population Responses to Climate Change", "projects": [{"proj_uid": "p0010002", "repository": "USAP-DC", "title": "Linking Foraging Behaviors to Demography to understand Albatrosses Population Responses to Climate Change"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -50.0, "title": "Linking oceanographic conditions, migratory schedules and foraging behaviour during the non-breeding season to reproductive performance in a long-lived seabird", "uid": "601140", "west": 68.5}, {"awards": "1341612 Bowser, Samuel", "bounds_geometry": ["POINT(163.5117 -77.57623)"], "date_created": "Wed, 28 Nov 2018 00:00:00 GMT", "description": "This data set comprises scanning electron micrographs of Astrammina rara exposed to sub-lethal concentrations of lead and cadmium. Specimens were shucked (i.e., shells removed) and incubated with metal-free plastic beads for two weeks. Control (no Pb or Cd) and experimental (1 and 5 ug/ml Pb; 0.5 and 1 ug/ml Cd) specimens were prepared for SEM using fixation and dehydration in ethanol (i.e., no aldehydes) and were imaged uncoated at 3keV.", "east": 163.5117, "geometry": ["POINT(163.5117 -77.57623)"], "keywords": "Antarctica; Biota; Foraminifera; Heavy Metal Toxicity; Scanning Electron Microscop; Scanning Electron Microscope (SEM) Images; Scanning Electron Microscopy; Transantarctic Mountains", "locations": "Antarctica; Transantarctic Mountains", "north": -77.57623, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Bowser, Samuel; Andreas, Amanda", "project_titles": "Assembling and Mining the Genomes of Giant Antarctic Foraminifera", "projects": [{"proj_uid": "p0000004", "repository": "USAP-DC", "title": "Assembling and Mining the Genomes of Giant Antarctic Foraminifera"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.57623, "title": "Scanning electron micrographs: Influence of heavy metal (Pb, Cd) exposure on shell morphogenesis in Astrammina rara, a giant agglutinated Antarctic foraminiferan protist.", "uid": "601138", "west": 163.5117}, {"awards": "1144192 Tulaczyk, Slawek", "bounds_geometry": ["POINT(162.2673 -77.722528)"], "date_created": "Wed, 28 Nov 2018 00:00:00 GMT", "description": "", "east": 162.2673, "geometry": ["POINT(162.2673 -77.722528)"], "keywords": "Antarctica; Borehole; Borehole Logging; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Temperature; Snow/ice; Snow/Ice; Temperature; Temperature Profiles", "locations": "Antarctica", "north": -77.722528, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Tulaczyk, Slawek", "project_titles": "Collaborative Research: MIDGE: Minimally Invasive Direct Glacial Exploration of Biogeochemistry, Hydrology and Glaciology of Blood Falls, McMurdo Dry Valleys", "projects": [{"proj_uid": "p0000002", "repository": "USAP-DC", "title": "Collaborative Research: MIDGE: Minimally Invasive Direct Glacial Exploration of Biogeochemistry, Hydrology and Glaciology of Blood Falls, McMurdo Dry Valleys"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.722528, "title": "Ice Temperature in Shallow Boreholes Near Blood Falls at the Terminus of Taylor Glacier, McMurdo Dry Valleys, Antarctica", "uid": "601139", "west": 162.2673}, {"awards": "1246463 Burns, Jennifer", "bounds_geometry": null, "date_created": "Sat, 24 Nov 2018 00:00:00 GMT", "description": "We examined the influence of sea ice break-out on seasonal diving patterns and diet of a top predator, the Weddell seal, to understand how phytoplankton blooms impact the vertical distribution of the food web. We captured female seals during the November and December lactation period and attached a LOTEK LAT1800 time-depth recorder (TDR) flipper tag with a 6 second sampling interval. Data were processed using the Iknos toolbox in MATLAB. Benthic dives (1% of all dives) were excluded from analyses because we were interested in quantifying seasonal changes in mid-water dives. Thus, we analyzed dives from 59 Weddell seals to characterize the diving depth and foraging effort of each seal across the austral summer over four years. We characterized seasonal changes in diving depth by calculating the mean across all seals of the maximum dive depth on each day for each seal. For more information see: Beltran, R. S. Bridging the gap between pupping and molting phenology: behavioral and ecological drivers in Weddell seals PhD thesis, University of Alaska Fairbanks, (2018).", "east": null, "geometry": null, "keywords": "Antarctica; Biota; Ross Sea; Seals; Southern Ocean; Weddell Seal", "locations": "Southern Ocean; Ross Sea; Antarctica", "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Beltran, Roxanne; Burns, Jennifer", "project_titles": "The Cost of A New Fur Coat: Interactions between Molt and Reproduction in Weddell Seals", "projects": [{"proj_uid": "p0000229", "repository": "USAP-DC", "title": "The Cost of A New Fur Coat: Interactions between Molt and Reproduction in Weddell Seals"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Weddell seal summer diving behavior", "uid": "601137", "west": null}, {"awards": "1341440 Jin, Meibing", "bounds_geometry": ["POLYGON((-180 -45,-144 -45,-108 -45,-72 -45,-36 -45,0 -45,36 -45,72 -45,108 -45,144 -45,180 -45,180 -49.5,180 -54,180 -58.5,180 -63,180 -67.5,180 -72,180 -76.5,180 -81,180 -85.5,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -85.5,-180 -81,-180 -76.5,-180 -72,-180 -67.5,-180 -63,-180 -58.5,-180 -54,-180 -49.5,-180 -45))"], "date_created": "Tue, 20 Nov 2018 00:00:00 GMT", "description": "", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Biota; Model Data; Oceans; Southern Ocean", "locations": "Antarctica; Southern Ocean", "north": -45.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Jin, Meibing", "project_titles": "Collaborative Research: Phytoplankton Phenology in the Antarctic: Drivers, Patterns, and Implications for the Adelie Penguin", "projects": [{"proj_uid": "p0000001", "repository": "USAP-DC", "title": "Collaborative Research: Phytoplankton Phenology in the Antarctic: Drivers, Patterns, and Implications for the Adelie Penguin"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Ice-ocean-ecosystem model output", "uid": "601136", "west": -180.0}, {"awards": "1142174 Smith, Walker", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Wed, 14 Nov 2018 00:00:00 GMT", "description": "This data set summarizes the responses of a variety of phytoplankton cultures to different temperatures. Variables assessed in triplicate at each temperature include cell abundance, chlorophyll and particulate organic carbon. Some eight species were assessed. Each experiment lasted ca. 25 days. ", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Biota; Chlorophyll; Foraminifera; Growth; Phytoplankton; Plankton; Temperature", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Smith, Walker", "project_titles": "Collaborative Research: Penguin Foraging Reveals Phytoplankton Spatial Structure in the Ross Sea", "projects": [{"proj_uid": "p0000322", "repository": "USAP-DC", "title": "Collaborative Research: Penguin Foraging Reveals Phytoplankton Spatial Structure in the Ross Sea"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Experimental analyses of phytoplankton temperature response", "uid": "601135", "west": -180.0}, {"awards": "1246463 Burns, Jennifer", "bounds_geometry": ["POLYGON((-180 -76,-177 -76,-174 -76,-171 -76,-168 -76,-165 -76,-162 -76,-159 -76,-156 -76,-153 -76,-150 -76,-150 -76.2,-150 -76.4,-150 -76.6,-150 -76.8,-150 -77,-150 -77.2,-150 -77.4,-150 -77.6,-150 -77.8,-150 -78,-153 -78,-156 -78,-159 -78,-162 -78,-165 -78,-168 -78,-171 -78,-174 -78,-177 -78,180 -78,178 -78,176 -78,174 -78,172 -78,170 -78,168 -78,166 -78,164 -78,162 -78,160 -78,160 -77.8,160 -77.6,160 -77.4,160 -77.2,160 -77,160 -76.8,160 -76.6,160 -76.4,160 -76.2,160 -76,162 -76,164 -76,166 -76,168 -76,170 -76,172 -76,174 -76,176 -76,178 -76,-180 -76))"], "date_created": "Thu, 08 Nov 2018 00:00:00 GMT", "description": "This dataset includes measurements of cortisol levels (pg/mg) extracted from Weddell Seal fur samples collected from adult females in colonies in the Erebus Bay region of Antarctica during 4 austral field seasons between November 2013 and February 2017. Observations recorded include body mass, body composition, reproductive status.", "east": 160.0, "geometry": ["POINT(-175 -77)"], "keywords": "Antarctica; Biota; Cortisol; Fur; Ross Sea; Seals; Southern Ocean; Visual Observations; Weddell Seal", "locations": "Ross Sea; Antarctica; Southern Ocean", "north": -76.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Burns, Jennifer", "project_titles": "The Cost of A New Fur Coat: Interactions between Molt and Reproduction in Weddell Seals", "projects": [{"proj_uid": "p0000229", "repository": "USAP-DC", "title": "The Cost of A New Fur Coat: Interactions between Molt and Reproduction in Weddell Seals"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Cortisol levels in Weddell seal fur ", "uid": "601134", "west": -150.0}, {"awards": "1246463 Burns, Jennifer", "bounds_geometry": ["POLYGON((164 -76,164.2 -76,164.4 -76,164.6 -76,164.8 -76,165 -76,165.2 -76,165.4 -76,165.6 -76,165.8 -76,166 -76,166 -76.2,166 -76.4,166 -76.6,166 -76.8,166 -77,166 -77.2,166 -77.4,166 -77.6,166 -77.8,166 -78,165.8 -78,165.6 -78,165.4 -78,165.2 -78,165 -78,164.8 -78,164.6 -78,164.4 -78,164.2 -78,164 -78,164 -77.8,164 -77.6,164 -77.4,164 -77.2,164 -77,164 -76.8,164 -76.6,164 -76.4,164 -76.2,164 -76))"], "date_created": "Tue, 30 Oct 2018 00:00:00 GMT", "description": "All sightings of known, tagged, Weddell seals during molt seasons of Austral summers 2013, 14 15, and 2016. Seals that were sighted but for which molt status could not be determined are not included in this dataset. Seals without tags or IDs were not included. ", "east": 166.0, "geometry": ["POINT(165 -77)"], "keywords": "Antarctica; Biota; Ross Sea; Seals; Visual Observations; Weddell Seal", "locations": "Antarctica; Ross Sea", "north": -76.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Burns, Jennifer", "project_titles": "The Cost of A New Fur Coat: Interactions between Molt and Reproduction in Weddell Seals", "projects": [{"proj_uid": "p0000229", "repository": "USAP-DC", "title": "The Cost of A New Fur Coat: Interactions between Molt and Reproduction in Weddell Seals"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Weddell Seal Molt Survey Data", "uid": "601133", "west": 164.0}, {"awards": "1543313 VanTongeren, Jill", "bounds_geometry": ["POLYGON((-55 -82,-54.5 -82,-54 -82,-53.5 -82,-53 -82,-52.5 -82,-52 -82,-51.5 -82,-51 -82,-50.5 -82,-50 -82,-50 -82.2,-50 -82.4,-50 -82.6,-50 -82.8,-50 -83,-50 -83.2,-50 -83.4,-50 -83.6,-50 -83.8,-50 -84,-50.5 -84,-51 -84,-51.5 -84,-52 -84,-52.5 -84,-53 -84,-53.5 -84,-54 -84,-54.5 -84,-55 -84,-55 -83.8,-55 -83.6,-55 -83.4,-55 -83.2,-55 -83,-55 -82.8,-55 -82.6,-55 -82.4,-55 -82.2,-55 -82))"], "date_created": "Mon, 29 Oct 2018 00:00:00 GMT", "description": "The dataset contains preliminary CA-ID-TIMS U-Pb zircon ages for 4 samples from the Dufek Intrusion, as well as major element mineral compositions for samples throughout the stratigraphy.", "east": -50.0, "geometry": ["POINT(-52.5 -83)"], "keywords": "Antarctica; Chemical Composition; Chemistry:rock; Chemistry:Rock; Crystallization; Dufek Complex; Geochemistry; Magma Chamber Procesess; Mass Spectrometry; Rocks; Snow/ice; Snow/Ice; Solid Earth; TIMS; Volcanic Deposits", "locations": "Antarctica", "north": -82.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "VanTongeren, Jill", "project_titles": "Collaborative Research: Testing the Hypothesis that Bigger Magma Chambers Crystallize Faster", "projects": [{"proj_uid": "p0000135", "repository": "USAP-DC", "title": "Collaborative Research: Testing the Hypothesis that Bigger Magma Chambers Crystallize Faster"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -84.0, "title": "U-Pb ages and mineral compositions from Dufek Intrusion", "uid": "601132", "west": -55.0}, {"awards": "1246463 Burns, Jennifer", "bounds_geometry": null, "date_created": "Mon, 22 Oct 2018 00:00:00 GMT", "description": "Animals can respond to dynamic environments through phenological plasticity of life history events; however, changes in one part of the annual cycle can diminish the success of subsequent life history events. Our aims were to determine the associations between reproduction and moult phenology across years and to quantify phenological plasticity across varying environmental conditions. We conducted demographic surveys of 4,252 flipper-tagged Weddell seals (Leptonychotes weddellii) in the Ross Sea, Antarctica during four austral summers. At each sighting, seals were assigned a moult code based on the visible presence of new fur, and the start date of each animal\u2019s moult was back-calculated. This dataset contains data on pupping and moult timing for each animal used to address this question.", "east": null, "geometry": null, "keywords": "Antarctica; B-292-M; Biota; Ross Sea; Seals; Southern Ocean; Weddell Seal", "locations": "Southern Ocean; Ross Sea; Antarctica", "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Burns, Jennifer", "project_titles": "The Cost of A New Fur Coat: Interactions between Molt and Reproduction in Weddell Seals", "projects": [{"proj_uid": "p0000229", "repository": "USAP-DC", "title": "The Cost of A New Fur Coat: Interactions between Molt and Reproduction in Weddell Seals"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Weddell Seal Molt Phenology Dataset", "uid": "601131", "west": null}, {"awards": "1443263 Higgins, John; 1443306 Mayewski, Paul", "bounds_geometry": ["POLYGON((159.35343 -76.73165,159.360199 -76.73165,159.366968 -76.73165,159.373737 -76.73165,159.380506 -76.73165,159.387275 -76.73165,159.394044 -76.73165,159.400813 -76.73165,159.407582 -76.73165,159.414351 -76.73165,159.42112 -76.73165,159.42112 -76.731833,159.42112 -76.732016,159.42112 -76.732199,159.42112 -76.732382,159.42112 -76.732565,159.42112 -76.732748,159.42112 -76.732931,159.42112 -76.733114,159.42112 -76.733297,159.42112 -76.73348,159.414351 -76.73348,159.407582 -76.73348,159.400813 -76.73348,159.394044 -76.73348,159.387275 -76.73348,159.380506 -76.73348,159.373737 -76.73348,159.366968 -76.73348,159.360199 -76.73348,159.35343 -76.73348,159.35343 -76.733297,159.35343 -76.733114,159.35343 -76.732931,159.35343 -76.732748,159.35343 -76.732565,159.35343 -76.732382,159.35343 -76.732199,159.35343 -76.732016,159.35343 -76.731833,159.35343 -76.73165))"], "date_created": "Wed, 17 Oct 2018 00:00:00 GMT", "description": "Stable water isotope data for the surface ice samples (listed as point numbers \u00ad coordinates provided) collected at the Allan Hills Blue ice area have been generated under a collaborative effort by the University of Maine Climate Change Institute (NSF Award#1443306) and Princeton University (NSF Award# 1443263). This data set contains stable isotope data (dD, d18O) of meltwater samples collected from the\r\narea(76.73165 to 76.73348 S,\u00a0159.35343 to 159.42112 E).", "east": 159.42112, "geometry": ["POINT(159.387275 -76.732565)"], "keywords": "Allan Hills; Allan Hills Project; Antarctica; Blue Ice; Chemistry:ice; Chemistry:Ice; Delta 18O; Delta Deuterium; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Gas Records; Ice Core Records; Oxygen; Snow/ice; Snow/Ice; Stable Water Isotopes; Transantarctic Mountains", "locations": "Antarctica; Allan Hills; Transantarctic Mountains", "north": -76.73165, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Kurbatov, Andrei V.; Mayewski, Paul A.; Introne, Douglas; Yan, Yuzhen", "project_titles": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area", "projects": [{"proj_uid": "p0000760", "repository": "USAP-DC", "title": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.73348, "title": "Stable water isotope data for the surface samples collected at the Allan Hills Blue ice area", "uid": "601130", "west": 159.35343}, {"awards": "1443306 Mayewski, Paul; 1443263 Higgins, John", "bounds_geometry": ["POINT(159.35507 -76.73286)"], "date_created": "Wed, 17 Oct 2018 00:00:00 GMT", "description": "Stable water isotope data for the ice core drilled at the Allan Hills Blue ice area have been generated under a collaborative effort by the University of Maine Climate Change Institute (NSF Award#1443306) and Princeton University (NSF Award# 1443263). This data set contains \r\nstable isotope data (dD, d18O) of meltwater samples collected from the ice core AH-1502 (76.73286 S, 159.35507 E) was drilled in 2015-16 field season to 197 meters below the surface.", "east": 159.35507, "geometry": ["POINT(159.35507 -76.73286)"], "keywords": "Allan Hills; Allan Hills Project; Antarctica; Blue Ice; Delta 18O; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core; Ice Core Chemistry; Ice Core Records; Isotope Data; Oxygen; Snow/ice; Snow/Ice; Stable Water Isotopes; Transantarctic Mountains", "locations": "Allan Hills; Antarctica; Transantarctic Mountains", "north": -76.73286, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Kurbatov, Andrei V.; Mayewski, Paul A.; Introne, Douglas; Yan, Yuzhen", "project_titles": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area", "projects": [{"proj_uid": "p0000760", "repository": "USAP-DC", "title": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.73286, "title": "Stable water isotope data for the AH-1502 ice core drilled at the Allan Hills Blue ice area", "uid": "601129", "west": 159.35507}, {"awards": "1443306 Mayewski, Paul; 1443263 Higgins, John", "bounds_geometry": ["POINT(159.3562 -76.73243)"], "date_created": "Tue, 16 Oct 2018 00:00:00 GMT", "description": "Stable water isotope data for the AH-1503 ice core drilled at the Allan Hills\r Blue ice area have been generated under a collaborative effort by the\r University of Maine Climate Change Institute (NSF Award#1443263) and\r Princeton University (NSF Award# 1443263). This data set contains stable isotope data (dD, d18O) of meltwater samples collected from the\r ice core AH-1503 (76.73243 S,\u00a0159.3562 E). Ice core site AH-1503 used the same borehole as AH- BIT58 drilled down to 124 m during the 2011-12 field season. All drilling was conducted with a 3\" Eclipse drill (Ice Drilling Design and Operations (IDDO)).\r\n", "east": 159.3562, "geometry": ["POINT(159.3562 -76.73243)"], "keywords": "Allan Hills; Antarctica; Blue Ice; Chemistry:ice; Chemistry:Ice; Delta 18O; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Isotope Record; Mass Spectrometry; Stable Water Isotopes", "locations": "Allan Hills; Antarctica", "north": -76.73243, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Kurbatov, Andrei V.; Mayewski, Paul A.; Introne, Douglas; Yan, Yuzhen", "project_titles": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area", "projects": [{"proj_uid": "p0000760", "repository": "USAP-DC", "title": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.73243, "title": "Stable water isotope data for the AH-1503 ice core drilled at the Allan Hills Blue ice area", "uid": "601128", "west": 159.3562}, {"awards": "1640481 Rotella, Jay; 1141326 Rotella, Jay", "bounds_geometry": ["POLYGON((162 -75,162.8 -75,163.6 -75,164.4 -75,165.2 -75,166 -75,166.8 -75,167.6 -75,168.4 -75,169.2 -75,170 -75,170 -75.38,170 -75.76,170 -76.14,170 -76.52,170 -76.9,170 -77.28,170 -77.66,170 -78.03999999999999,170 -78.42,170 -78.8,169.2 -78.8,168.4 -78.8,167.6 -78.8,166.8 -78.8,166 -78.8,165.2 -78.8,164.4 -78.8,163.6 -78.8,162.8 -78.8,162 -78.8,162 -78.42,162 -78.03999999999999,162 -77.66,162 -77.28,162 -76.9,162 -76.52,162 -76.14,162 -75.76,162 -75.38,162 -75))"], "date_created": "Tue, 02 Oct 2018 00:00:00 GMT", "description": "The Access database contains information for 3 types of data on Weddell seals for the period 1969-2017. (1) Mark-recapture Data with 278,723 resighting records for 25,589 different individuals tagged in and around the McMurdo Sound area, as well as 740 records from 162 seals tagged at White Island; (2) Mass Dynamics Data contains 5,737 physical masses and 1,271 photographic records and measurements that include the date, ID number, sex, age class, weight (if successfully collected), and perspectives from which photographs were collected for each sampling occurrence; and (3) Research Procedures Data contains 1,005 records of handling and research procedures conducted on Erebus Bay Weddell seals by various research teams in recent years.", "east": 170.0, "geometry": ["POINT(166 -76.9)"], "keywords": "Antarctica; Biota; Sea Ice", "locations": "Antarctica", "north": -75.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Rotella, Jay", "project_titles": "The Demographic Consequences of Environmental Variability and Individual Heterogeneity in Life-history Tactics of a Long-lived Antarctic Marine Predator", "projects": [{"proj_uid": "p0000299", "repository": "USAP-DC", "title": "The Demographic Consequences of Environmental Variability and Individual Heterogeneity in Life-history Tactics of a Long-lived Antarctic Marine Predator"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.8, "title": "Demographic data for Weddell Seal colonies in Erebus Bay through the 2017 Antarctic field season", "uid": "601125", "west": 162.0}, {"awards": "0838947 Tulaczyk, Slawek", "bounds_geometry": ["POLYGON((-165.28 -84.24,-165.086 -84.24,-164.892 -84.24,-164.698 -84.24,-164.504 -84.24,-164.31 -84.24,-164.116 -84.24,-163.922 -84.24,-163.728 -84.24,-163.534 -84.24,-163.34 -84.24,-163.34 -84.252,-163.34 -84.264,-163.34 -84.276,-163.34 -84.288,-163.34 -84.3,-163.34 -84.312,-163.34 -84.324,-163.34 -84.336,-163.34 -84.348,-163.34 -84.36,-163.534 -84.36,-163.728 -84.36,-163.922 -84.36,-164.116 -84.36,-164.31 -84.36,-164.504 -84.36,-164.698 -84.36,-164.892 -84.36,-165.086 -84.36,-165.28 -84.36,-165.28 -84.348,-165.28 -84.336,-165.28 -84.324,-165.28 -84.312,-165.28 -84.3,-165.28 -84.288,-165.28 -84.276,-165.28 -84.264,-165.28 -84.252,-165.28 -84.24))"], "date_created": "Sun, 09 Sep 2018 00:00:00 GMT", "description": "This dataset contains ice-shelf basal melt rates and vertical strain rates for 11 sites near the Whillans Ice Stream grounding line. These rates were determined using Autonomous Phase-Sensitive Radar. Data processing is described in Begeman et al. 2018, JGR Oceans. These sites are concentrated within an embayment of the Ross Ice Shelf. These melt rates and strain rates were determined over periods ranging from 10 to 38 days in December 2014 to January 2015. ", "east": -163.34, "geometry": ["POINT(-164.31 -84.3)"], "keywords": "Antarctica; Flexure Zone; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Shelf; Ice-Shelf Basal Melting; Ice-Shelf Strain Rate", "locations": "Antarctica", "north": -84.24, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Begeman, Carolyn", "project_titles": "Collaborative Research: Integrative Study of Marine Ice Sheet Stability \u0026 Subglacial Life Habitats in W Antarctica - Lake \u0026 Ice Stream Subglacial Access Research Drilling (LISSARD)", "projects": [{"proj_uid": "p0000105", "repository": "USAP-DC", "title": "Collaborative Research: Integrative Study of Marine Ice Sheet Stability \u0026 Subglacial Life Habitats in W Antarctica - Lake \u0026 Ice Stream Subglacial Access Research Drilling (LISSARD)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WISSARD", "south": -84.36, "title": "Basal melt rates of the Ross Ice Shelf near the Whillans Ice Stream grounding line", "uid": "601122", "west": -165.28}, {"awards": "1141866 Conway, Howard", "bounds_geometry": ["POLYGON((165.656 -83.357,166.3059 -83.357,166.9558 -83.357,167.6057 -83.357,168.2556 -83.357,168.9055 -83.357,169.5554 -83.357,170.2053 -83.357,170.8552 -83.357,171.5051 -83.357,172.155 -83.357,172.155 -83.6036,172.155 -83.8502,172.155 -84.0968,172.155 -84.3434,172.155 -84.59,172.155 -84.8366,172.155 -85.0832,172.155 -85.3298,172.155 -85.5764,172.155 -85.823,171.5051 -85.823,170.8552 -85.823,170.2053 -85.823,169.5554 -85.823,168.9055 -85.823,168.2556 -85.823,167.6057 -85.823,166.9558 -85.823,166.3059 -85.823,165.656 -85.823,165.656 -85.5764,165.656 -85.3298,165.656 -85.0832,165.656 -84.8366,165.656 -84.59,165.656 -84.3434,165.656 -84.0968,165.656 -83.8502,165.656 -83.6036,165.656 -83.357))"], "date_created": "Sun, 09 Sep 2018 00:00:00 GMT", "description": "This data set contains radar-detected measurements of surface topography, ice thickness and derived bed topography across Beardmore Glacier and its tributary Mill Glacier.", "east": 172.155, "geometry": ["POINT(168.9055 -84.59)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Thickness; Radar", "locations": "Antarctica", "north": -83.357, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Conway, Howard", "project_titles": "Collaborative Research: East Antarctic Outlet Glacier Dynamics", "projects": [{"proj_uid": "p0000437", "repository": "USAP-DC", "title": "Collaborative Research: East Antarctic Outlet Glacier Dynamics"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -85.823, "title": "Geophysical measurements Beardmore Glacier, Antarctica", "uid": "601121", "west": 165.656}, {"awards": null, "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Wed, 05 Sep 2018 00:00:00 GMT", "description": "In this data set we present observations of locations of surface crevasses in Antarctica collected from satellite images for the period between 2011 and 2015 for 46 ice shelf regions.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Crevasses; Fractures; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Sheet; Ice Shelf; Satellite Remote Sensing", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": null, "persons": "Emetc, Veronika", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -90.0, "title": "Location of surface crevasses in Antarctica", "uid": "601117", "west": -180.0}, {"awards": "1443126 MacAyeal, Douglas", "bounds_geometry": ["POLYGON((165.911079 -77.872851,165.941267 -77.872851,165.971455 -77.872851,166.001643 -77.872851,166.031831 -77.872851,166.062019 -77.872851,166.092207 -77.872851,166.122395 -77.872851,166.152583 -77.872851,166.182771 -77.872851,166.212959 -77.872851,166.212959 -77.8781411,166.212959 -77.8834312,166.212959 -77.8887213,166.212959 -77.8940114,166.212959 -77.8993015,166.212959 -77.9045916,166.212959 -77.9098817,166.212959 -77.9151718,166.212959 -77.9204619,166.212959 -77.925752,166.182771 -77.925752,166.152583 -77.925752,166.122395 -77.925752,166.092207 -77.925752,166.062019 -77.925752,166.031831 -77.925752,166.001643 -77.925752,165.971455 -77.925752,165.941267 -77.925752,165.911079 -77.925752,165.911079 -77.9204619,165.911079 -77.9151718,165.911079 -77.9098817,165.911079 -77.9045916,165.911079 -77.8993015,165.911079 -77.8940114,165.911079 -77.8887213,165.911079 -77.8834312,165.911079 -77.8781411,165.911079 -77.872851))"], "date_created": "Tue, 04 Sep 2018 00:00:00 GMT", "description": "During the melt seasons of 2015/6 and 2016/7, water pressure gages were deployed on the McMurdo Ice Shelf to observe water depth in supraglacial lakes and streams. This was done in support of research directed toward understanding how filling and draining supraglacial lakes would induce ice-shelf flexure and fracture.", "east": 166.212959, "geometry": ["POINT(166.062019 -77.8993015)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Shelf; Snow/ice; Snow/Ice; Subglacial And Supraglacial Water Depth; Supraglacial Lake; Supraglacial Meltwater; Water Depth", "locations": "Antarctica", "north": -77.872851, "nsf_funding_programs": "Antarctic Glaciology", "persons": "MacAyeal, Douglas; Banwell, Alison", "project_titles": "Impact of Supraglacial Lakes on Ice-Shelf Stability", "projects": [{"proj_uid": "p0000138", "repository": "USAP-DC", "title": "Impact of Supraglacial Lakes on Ice-Shelf Stability"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.925752, "title": "Supraglacial Lake Depths on McMurdo Ice Shelf, Antarctica", "uid": "601116", "west": 165.911079}, {"awards": "1341547 Stroeve, Julienne", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Fri, 31 Aug 2018 00:00:00 GMT", "description": "Sea ice variability within the marginal ice zone (MIZ) and polynyas plays an important role for phytoplankton productivity and krill abundance. Therefore, mapping their spatial extent, seasonal and interannual variability is essential for understanding how current and future changes in these biologically active regions may impact the Antarctic marine ecosystem. Knowledge of the distribution of MIZ, consolidated pack ice and coastal polynyas to the total Antarctic sea ice cover may also help to shed light on the factors contributing towards recent expansion of the Antarctic ice cover in some regions and contraction in others. The long-term passive microwave 21 satellite data record provides the longest and most consistent record for assessing the proportion of the sea ice cover that is covered by each of these ice categories. This data set provides estimates of the MIZ, consolidated pack ice and polynyas from the NASA Team and Bootstrap sea ice concentration data sets, from 1979 to 2017.\r\n", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Pack Ice; Polynya; Sea Ice; Southern Ocean", "locations": "Southern Ocean; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Stroeve, Julienne", "project_titles": "Collaborative Research: Phytoplankton Phenology in the Antarctic: Drivers, Patterns, and Implications for the Adelie Penguin", "projects": [{"proj_uid": "p0000001", "repository": "USAP-DC", "title": "Collaborative Research: Phytoplankton Phenology in the Antarctic: Drivers, Patterns, and Implications for the Adelie Penguin"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Antarctic MIZ, Pack Ice and Polynya Maps from Passive Microwave Satellite Data", "uid": "601115", "west": -180.0}, {"awards": "1443126 MacAyeal, Douglas", "bounds_geometry": ["POLYGON((166.152184 -77.902339,166.1559273 -77.902339,166.1596706 -77.902339,166.1634139 -77.902339,166.1671572 -77.902339,166.1709005 -77.902339,166.1746438 -77.902339,166.1783871 -77.902339,166.1821304 -77.902339,166.1858737 -77.902339,166.189617 -77.902339,166.189617 -77.9026372,166.189617 -77.9029354,166.189617 -77.9032336,166.189617 -77.9035318,166.189617 -77.90383,166.189617 -77.9041282,166.189617 -77.9044264,166.189617 -77.9047246,166.189617 -77.9050228,166.189617 -77.905321,166.1858737 -77.905321,166.1821304 -77.905321,166.1783871 -77.905321,166.1746438 -77.905321,166.1709005 -77.905321,166.1671572 -77.905321,166.1634139 -77.905321,166.1596706 -77.905321,166.1559273 -77.905321,166.152184 -77.905321,166.152184 -77.9050228,166.152184 -77.9047246,166.152184 -77.9044264,166.152184 -77.9041282,166.152184 -77.90383,166.152184 -77.9035318,166.152184 -77.9032336,166.152184 -77.9029354,166.152184 -77.9026372,166.152184 -77.902339))"], "date_created": "Fri, 31 Aug 2018 00:00:00 GMT", "description": "During the Austral summer melt season of 2016-2017, an automatic camera was placed overlooking a surface lake feature on the McMurdo Ice Shelf. This camera created a time-lapse video (30 minute photograph time intervals) used to observe the filling and draining of the lake called Rift-Tip Lake located approximately 2 km from the McMurdo Ice Shelf ice front. The data was used in support of a field project to measure the flexural response of the McMurdo Ice Shelf (and ice shelves in general) to the filling and draining of supraglacial lakes. The time-lapse video begins 16 November 2016 and ends 27 January 2017.", "east": 166.189617, "geometry": ["POINT(166.1709005 -77.90383)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Shelf; Photo/video; Photo/Video; Supraglacial Meltwater", "locations": "Antarctica", "north": -77.902339, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "MacAyeal, Douglas; Banwell, Alison", "project_titles": "Impact of Supraglacial Lakes on Ice-Shelf Stability", "projects": [{"proj_uid": "p0000138", "repository": "USAP-DC", "title": "Impact of Supraglacial Lakes on Ice-Shelf Stability"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.905321, "title": "Time-lapse video of McMurdo Ice Shelf surface melting and hydrology", "uid": "601113", "west": 166.152184}, {"awards": "1142052 MacPhee, Ross", "bounds_geometry": ["POINT(-56.62 -64.23)"], "date_created": "Mon, 13 Aug 2018 00:00:00 GMT", "description": "Fossils collected on Antarctic expeditions between 2008 and 2016 that have been accessioned into the collection of the Paleontology Division, AMNH ", "east": -56.62, "geometry": ["POINT(-56.62 -64.23)"], "keywords": "Antarctica; Biota; Penguin; Seymour Island; Vertebrates", "locations": "Antarctica; Seymour Island", "north": -64.23, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "MacPhee, Ross", "project_titles": "Collaborative Research: Late Cretaceous-Paleogene Vertebrates from Antarctica: Implications for Paleobiogeography, Paleoenvironment, and Extinction in Polar Gondwana", "projects": [{"proj_uid": "p0000380", "repository": "USAP-DC", "title": "Collaborative Research: Late Cretaceous-Paleogene Vertebrates from Antarctica: Implications for Paleobiogeography, Paleoenvironment, and Extinction in Polar Gondwana"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.23, "title": "2008-2016 AMNH accessioned vertebrate fossils from Seymour Island ", "uid": "601112", "west": -56.62}, {"awards": "1443733 Winsor, Peter", "bounds_geometry": ["POLYGON((-62.68 -64.72,-62.648 -64.72,-62.616 -64.72,-62.584 -64.72,-62.552 -64.72,-62.52 -64.72,-62.488 -64.72,-62.456 -64.72,-62.424 -64.72,-62.392 -64.72,-62.36 -64.72,-62.36 -64.74,-62.36 -64.76,-62.36 -64.78,-62.36 -64.8,-62.36 -64.82,-62.36 -64.84,-62.36 -64.86,-62.36 -64.88,-62.36 -64.9,-62.36 -64.92,-62.392 -64.92,-62.424 -64.92,-62.456 -64.92,-62.488 -64.92,-62.52 -64.92,-62.552 -64.92,-62.584 -64.92,-62.616 -64.92,-62.648 -64.92,-62.68 -64.92,-62.68 -64.9,-62.68 -64.88,-62.68 -64.86,-62.68 -64.84,-62.68 -64.82,-62.68 -64.8,-62.68 -64.78,-62.68 -64.76,-62.68 -64.74,-62.68 -64.72))"], "date_created": "Tue, 07 Aug 2018 00:00:00 GMT", "description": "This dataset includes timelapse images from five cameras set up at four different locations in and just outside of Andvord Bay on the Western Antarctic Peninsula. The cameras were set up to track glacier ice motion, calving and tracking of ice bergs, and sea ice formation and melt. Two cameras (hi-res) were Canon Rebel DSLR in a timelapse system designed by Harbortronics; the remaining three cameras (lo-res) were from Campbell Scientific and were part of a weather station.", "east": -62.36, "geometry": ["POINT(-62.52 -64.82)"], "keywords": "Antarctica; Antarctic Peninsula; Glaciers/ice Sheet; Glaciers/Ice Sheet; Iceberg; Photo; Photo/video; Photo/Video", "locations": "Antarctic Peninsula; Antarctica", "north": -64.72, "nsf_funding_programs": "Antarctic Integrated System Science; Antarctic Organisms and Ecosystems", "persons": "Truffer, Martin; Winsor, Peter", "project_titles": "Collaborative Research: Fjord Ecosystem Structure and Function on the West Antarctic Peninsula - Hotspots of Productivity and Biodiversity? (FjordEco)", "projects": [{"proj_uid": "p0010010", "repository": "USAP-DC", "title": "Collaborative Research: Fjord Ecosystem Structure and Function on the West Antarctic Peninsula - Hotspots of Productivity and Biodiversity? (FjordEco)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "FjordEco", "south": -64.92, "title": "Andvord Bay Glacier Timelapse", "uid": "601111", "west": -62.68}, {"awards": "1141877 Aronson, Richard", "bounds_geometry": null, "date_created": "Fri, 27 Jul 2018 00:00:00 GMT", "description": "This data set includes measurements of the percent calcium, thickness, and microhardness of the exoskeleton in Paralomis birsteini, Cancer borealis, and Callinectes sapidus. Measurements were taken in the carapace, major chela, and minor chela of each crab. Paralomis birsteini were trapped at ~1350 m depth off Marguerite Bay, western Antarctic Peninsula in 2015. Cancer borealis were trapped in the Gulf of Maine, USA at ~50 m depth, and Callinectes sapidus were trapped in Florida, USA at depths shallower than 30 m. ", "east": null, "geometry": null, "keywords": "Antarctica; Biota; Callinectes; Exoskeleton; Fish; Glaciers/ice Sheet; Glaciers/Ice Sheet; Paralomis", "locations": "Antarctica", "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Steffel, Brittan", "project_titles": "Collaborative Research: Climate Change and Predatory Invasion of the Antarctic Benthos", "projects": [{"proj_uid": "p0000303", "repository": "USAP-DC", "title": "Collaborative Research: Climate Change and Predatory Invasion of the Antarctic Benthos"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Material properties of the exoskeleton of Paralomis birsteini", "uid": "601109", "west": null}, {"awards": "1246296 Yen, Jeannette", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Thu, 26 Jul 2018 00:00:00 GMT", "description": "A portable tomographic particle image velocimetry (tomographic PIV) system is described. The system was successfully deployed in Antarctica to study shelled Antarctic pteropods (Limacina helicina antarctica) \u2013 a delicate organism with an unusual propulsion mechanism. The experimental setup consists of a free-standing frame assembled with optical rails, thus avoiding the need for heavy and bulky equipment (e.g. an optical table). The cameras, lasers, optics, and tanks are all rigidly supported within the frame assembly. The results indicate that the pteropods flap their parapodia (or \u201cwings\u201d) downward during both power and recovery strokes, which is facilitated by the pitching of their shell. Shell pitching significantly alters the flapping trajectory, allowing the pteropod to move vertically and/or horizontally. The pronation and supination of the parapodia, together with the figure eight motion during flapping, suggest similarities with insect flight. The volumetric velocity field surrounding the freely-swimming pteropod reveals the generation of an attached vortex ring connecting the leading edge vortex to the trailing edge vortex during power stroke, and a presence of a leading-edge vortex during recovery stroke. These vortex structures play a major role in accelerating the organism vertically and indicate that forces generated on the parapodia during flapping constitute both lift and drag. After completing each stroke, two vortex rings are shed into the wake of the pteropod. The complex combination of body kinematics (parapodia flapping, shell pitch, saw-tooth trajectory), flow structures, and resulting force balance may be significantly altered by thinning of the pteropod shell, thus making pteropods an indicator of the detrimental effects of ocean acidification.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Biota; Glaciology", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Organisms and Ecosystems", "persons": "Adhikari, Deepak; Webster, Donald R; Yen, Jeannette", "project_titles": "Collaborative Research: Pteropod Swimming Behavior as a Bio Assay for Ocean Acidification", "projects": [{"proj_uid": "p0000139", "repository": "USAP-DC", "title": "Collaborative Research: Pteropod Swimming Behavior as a Bio Assay for Ocean Acidification"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Tomographic PIV measurements of swimming shelled Antarctic pteropod", "uid": "601108", "west": -180.0}, {"awards": "1443126 MacAyeal, Douglas", "bounds_geometry": ["POLYGON((166.02819 -77.887495,166.053634 -77.887495,166.079078 -77.887495,166.104522 -77.887495,166.129966 -77.887495,166.15541 -77.887495,166.180854 -77.887495,166.206298 -77.887495,166.231742 -77.887495,166.257186 -77.887495,166.28263 -77.887495,166.28263 -77.8926145,166.28263 -77.897734,166.28263 -77.9028535,166.28263 -77.907973,166.28263 -77.9130925,166.28263 -77.918212,166.28263 -77.9233315,166.28263 -77.928451,166.28263 -77.9335705,166.28263 -77.93869,166.257186 -77.93869,166.231742 -77.93869,166.206298 -77.93869,166.180854 -77.93869,166.15541 -77.93869,166.129966 -77.93869,166.104522 -77.93869,166.079078 -77.93869,166.053634 -77.93869,166.02819 -77.93869,166.02819 -77.9335705,166.02819 -77.928451,166.02819 -77.9233315,166.02819 -77.918212,166.02819 -77.9130925,166.02819 -77.907973,166.02819 -77.9028535,166.02819 -77.897734,166.02819 -77.8926145,166.02819 -77.887495))"], "date_created": "Tue, 24 Jul 2018 00:00:00 GMT", "description": "Over 2 Austral summer periods in 2015/6 and 2016/17, up to 12 geodetic GPS receivers were deployed on the McMurdo Ice Shelf to study its vertical deflection in response to moving meltwater loads. (5 GPS were deployed in 2015/16, 12 in 2016/17.) The GPS receivers and antennas were supplied by UNAVCO and were Trimble NetR9\u2019s and Zephyr Geodetic, respectively. The GPS receivers were stationary for the entire field seasons (were never moved). Following each field season, the GPS data were processed using MIT software called TRACK, which is part of the GAMIT package. The UNAVCO-run base station at McMurdo Station, approximately 16 km away from the field area, was used as part of the processing.", "east": 166.28263, "geometry": ["POINT(166.15541 -77.9130925)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPS; Ice Flow Velocity; Ice Shelf; Ice-Shelf Flexure; Snow/ice; Snow/Ice; Surface Melt", "locations": "Antarctica", "north": -77.887495, "nsf_funding_programs": "Antarctic Glaciology", "persons": "MacAyeal, Douglas; Banwell, Alison", "project_titles": "Impact of Supraglacial Lakes on Ice-Shelf Stability", "projects": [{"proj_uid": "p0000138", "repository": "USAP-DC", "title": "Impact of Supraglacial Lakes on Ice-Shelf Stability"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.93869, "title": "McMurdo Ice Shelf GPS survey of vertical motion", "uid": "601107", "west": 166.02819}, {"awards": "1443126 MacAyeal, Douglas", "bounds_geometry": ["POINT(166.521 -77.936)"], "date_created": "Fri, 20 Jul 2018 00:00:00 GMT", "description": "An automatic weather station was operated on the McMurdo Ice Shelf near Pegasus Air Strip for 365 days from 24 January 2016 to 22 January 2017. The sensors consisted of temperature/RH at 2 m and 8 m (above surface), wind speed at 2 m and 8 m, 4-component radiometer, and wind direction. Time series provides averages for every 30 minutes of a 30 second sample scheme.", "east": 166.521, "geometry": ["POINT(166.521 -77.936)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Hydrology; Ice Shelf; Snow/ice; Snow/Ice; Surface Hydrology; Surface Mass Balance; Weather Station Data", "locations": "Antarctica", "north": -77.936, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Banwell, Alison; MacAyeal, Douglas", "project_titles": "Impact of Supraglacial Lakes on Ice-Shelf Stability", "projects": [{"proj_uid": "p0000138", "repository": "USAP-DC", "title": "Impact of Supraglacial Lakes on Ice-Shelf Stability"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.936, "title": "McMurdo Ice Shelf AWS data", "uid": "601106", "west": 166.521}, {"awards": "1644159 Jacobs, Stanley", "bounds_geometry": ["POLYGON((-115 -73.5,-114.5 -73.5,-114 -73.5,-113.5 -73.5,-113 -73.5,-112.5 -73.5,-112 -73.5,-111.5 -73.5,-111 -73.5,-110.5 -73.5,-110 -73.5,-110 -73.6,-110 -73.7,-110 -73.8,-110 -73.9,-110 -74,-110 -74.1,-110 -74.2,-110 -74.3,-110 -74.4,-110 -74.5,-110.5 -74.5,-111 -74.5,-111.5 -74.5,-112 -74.5,-112.5 -74.5,-113 -74.5,-113.5 -74.5,-114 -74.5,-114.5 -74.5,-115 -74.5,-115 -74.4,-115 -74.3,-115 -74.2,-115 -74.1,-115 -74,-115 -73.9,-115 -73.8,-115 -73.7,-115 -73.6,-115 -73.5))"], "date_created": "Thu, 12 Jul 2018 00:00:00 GMT", "description": "Collection of CTD and LADCP summer profile observations in front of Dotson ice shelf, West Antarctica, between 2000 and 2016. The data can also be obtained from the various investigators and data centers, including the British Oceanographic Data Centre, the National Oceanographic Data Center, and the Korean Oceanographic Data Center. This dataset is used in the publication by Jenkins and collaborators in Nature Geoscience, 2018, entitled West Antarctic Ice Sheet retreat in the Amundsen Sea driven by decadal oceanic variability.", "east": -110.0, "geometry": ["POINT(-112.5 -74)"], "keywords": "Amundsen Sea; Antarctica; Dotson Ice Shelf; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ocean Properties; Oceans; Physical Oceanography; West Antarctica", "locations": "Amundsen Sea; West Antarctica; Antarctica; Dotson Ice Shelf", "north": -73.5, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Dutrieux, Pierre; Jacobs, Stanley; Jenkins, Adrian; Stammerjohn, Sharon", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -74.5, "title": "CTDP/LADCP profile data along Dotson ice shelf calving front from 2000 to 2016", "uid": "601105", "west": -115.0}, {"awards": "0839031 Severinghaus, Jeffrey; 1246148 Severinghaus, Jeffrey", "bounds_geometry": ["POLYGON((161.41425 -77.73489,161.486884 -77.73489,161.559518 -77.73489,161.632152 -77.73489,161.704786 -77.73489,161.77742 -77.73489,161.850054 -77.73489,161.922688 -77.73489,161.995322 -77.73489,162.067956 -77.73489,162.14059 -77.73489,162.14059 -77.747868,162.14059 -77.760846,162.14059 -77.773824,162.14059 -77.786802,162.14059 -77.79978,162.14059 -77.812758,162.14059 -77.825736,162.14059 -77.838714,162.14059 -77.851692,162.14059 -77.86467,162.067956 -77.86467,161.995322 -77.86467,161.922688 -77.86467,161.850054 -77.86467,161.77742 -77.86467,161.704786 -77.86467,161.632152 -77.86467,161.559518 -77.86467,161.486884 -77.86467,161.41425 -77.86467,161.41425 -77.851692,161.41425 -77.838714,161.41425 -77.825736,161.41425 -77.812758,161.41425 -77.79978,161.41425 -77.786802,161.41425 -77.773824,161.41425 -77.760846,161.41425 -77.747868,161.41425 -77.73489))"], "date_created": "Fri, 08 Jun 2018 00:00:00 GMT", "description": "This dataset contains the chemistry and dust measurements from Taylor Glacier as well as the new Taylor Dome TD2015 time scale described in Baggenstos et al. (2018). ", "east": 162.14059, "geometry": ["POINT(161.77742 -77.79978)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Horizontal Ice Core; Ice Core Records; Taylor Dome; Taylor Dome Ice Core", "locations": "Taylor Dome; Antarctica", "north": -77.73489, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Severinghaus, Jeffrey P.", "project_titles": "Collaborative Research: A \"Horizontal Ice Core\" for Large-Volume Samples of the Past Atmosphere, Taylor Glacier, Antarctica", "projects": [{"proj_uid": "p0000099", "repository": "USAP-DC", "title": "Collaborative Research: A \"Horizontal Ice Core\" for Large-Volume Samples of the Past Atmosphere, Taylor Glacier, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.86467, "title": "Taylor Glacier chemistry data and Taylor Dome TD2015 time scale", "uid": "601103", "west": 161.41425}, {"awards": "1245915 Ray, Laura", "bounds_geometry": ["POLYGON((168.36 -78.03,168.384 -78.03,168.408 -78.03,168.432 -78.03,168.456 -78.03,168.48 -78.03,168.504 -78.03,168.528 -78.03,168.552 -78.03,168.576 -78.03,168.6 -78.03,168.6 -78.035,168.6 -78.04,168.6 -78.045,168.6 -78.05,168.6 -78.055,168.6 -78.06,168.6 -78.065,168.6 -78.07,168.6 -78.075,168.6 -78.08,168.576 -78.08,168.552 -78.08,168.528 -78.08,168.504 -78.08,168.48 -78.08,168.456 -78.08,168.432 -78.08,168.408 -78.08,168.384 -78.08,168.36 -78.08,168.36 -78.075,168.36 -78.07,168.36 -78.065,168.36 -78.06,168.36 -78.055,168.36 -78.05,168.36 -78.045,168.36 -78.04,168.36 -78.035,168.36 -78.03))"], "date_created": "Thu, 07 Jun 2018 00:00:00 GMT", "description": "This dataset is comprised of ground penetrating radar data (GSSI DZT format with DZG files for GPS location) of a 28 square km area conduced in the heavily crevassed McMurdo Shear Zone in two consecutive field seasons. A radar system comprised of a GSSI SIR-30 32-bit two-channel control unit and model 5103 \u201c400 MHz\u201d and Model 5106A \u201c200 MHz\u201d antenna units were used to conduct the GPR surveys. The radar system was mounted on a sled and towed by a robot. The robot surveyed the 5 x 5.7 km area on lines separated by 50-m and traveled from West to East and return. The 2014 survey was conducted between Oct 29, 2014 and Nov 9, 2014, and the 2015 survey was conducted between Oct 26, 2015 and Nov 1, 2015. The use of identical waypoints in each year provides an Eulerian sampling protocol, where sampled GPS locations remain fixed, but the ice moves between annual surveys. In 2014, the 400 MHz antenna imaged to a depth of 19 meters, and in 2015, the 400 MHz antenna imaged to a depth of 80 meters to examine englacial ice. In both years, the 200 MHz antenna imaged to a depth of 160 meters.", "east": 168.6, "geometry": ["POINT(168.48 -78.055)"], "keywords": "Antarctica; Firn; Folds; Geology/Geophysics - Other; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Snow/ice; Snow/Ice", "locations": "Antarctica", "north": -78.03, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Ray, Laura; Arcone, Steven; Kaluzienski, Lynn; Koons, Peter; Lever, Jim; Walker, Ben", "project_titles": "Collaborative Research: Flow and Fracture Dynamics in an Ice Shelf Lateral Margin: Observations and Modeling of the McMurdo Shear Zone", "projects": [{"proj_uid": "p0000701", "repository": "USAP-DC", "title": "Collaborative Research: Flow and Fracture Dynamics in an Ice Shelf Lateral Margin: Observations and Modeling of the McMurdo Shear Zone"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.08, "title": "Ground Penetrating Radar Grid Survey of the McMurdo Shear Zone", "uid": "601102", "west": 168.36}, {"awards": "1443471 Koutnik, Michelle", "bounds_geometry": ["POLYGON((110 -89,117 -89,124 -89,131 -89,138 -89,145 -89,152 -89,159 -89,166 -89,173 -89,180 -89,180 -89.1,180 -89.2,180 -89.3,180 -89.4,180 -89.5,180 -89.6,180 -89.7,180 -89.8,180 -89.9,180 -90,173 -90,166 -90,159 -90,152 -90,145 -90,138 -90,131 -90,124 -90,117 -90,110 -90,110 -89.9,110 -89.8,110 -89.7,110 -89.6,110 -89.5,110 -89.4,110 -89.3,110 -89.2,110 -89.1,110 -89))"], "date_created": "Tue, 29 May 2018 00:00:00 GMT", "description": "These data indicate the positions and velocities of a network of stakes emplaced in the vicinity of South Pole during 2015-2018. They were collected by resurveying emplaced poles over the course of 1-2 years.", "east": 180.0, "geometry": ["POINT(145 -89.5)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPS; Ice Velocity", "locations": "Antarctica", "north": -89.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Lilien, David; Fudge, T. J.; Koutnik, Michelle; Conway, Howard; Waddington, Edwin D.", "project_titles": "Collaborative Research: Characterization of Upstream Ice and Firn Dynamics affecting the South Pole Ice Core", "projects": [{"proj_uid": "p0000200", "repository": "USAP-DC", "title": "Collaborative Research: Characterization of Upstream Ice and Firn Dynamics affecting the South Pole Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -90.0, "title": "South Pole area GPS velocities", "uid": "601100", "west": 110.0}, {"awards": "1341585 Sorlien, Christopher", "bounds_geometry": ["POLYGON((-180 -73.22,-179.17 -73.22,-178.34 -73.22,-177.51 -73.22,-176.68 -73.22,-175.85 -73.22,-175.02 -73.22,-174.19 -73.22,-173.36 -73.22,-172.53 -73.22,-171.7 -73.22,-171.7 -73.765,-171.7 -74.31,-171.7 -74.855,-171.7 -75.4,-171.7 -75.945,-171.7 -76.49,-171.7 -77.035,-171.7 -77.58,-171.7 -78.125,-171.7 -78.67,-172.53 -78.67,-173.36 -78.67,-174.19 -78.67,-175.02 -78.67,-175.85 -78.67,-176.68 -78.67,-177.51 -78.67,-178.34 -78.67,-179.17 -78.67,180 -78.67,178.56 -78.67,177.12 -78.67,175.68 -78.67,174.24 -78.67,172.8 -78.67,171.36 -78.67,169.92 -78.67,168.48 -78.67,167.04 -78.67,165.6 -78.67,165.6 -78.125,165.6 -77.58,165.6 -77.035,165.6 -76.49,165.6 -75.945,165.6 -75.4,165.6 -74.855,165.6 -74.31,165.6 -73.765,165.6 -73.22,167.04 -73.22,168.48 -73.22,169.92 -73.22,171.36 -73.22,172.8 -73.22,174.24 -73.22,175.68 -73.22,177.12 -73.22,178.56 -73.22,-180 -73.22))"], "date_created": "Fri, 25 May 2018 00:00:00 GMT", "description": "This data set includes digital 1 km grids of sub-bottom \n\tstratigraphy of most of Ross Sea. In addition to acoustic basement (same as top\n\tsyn-rift sedimentary rocks in Central Trough and probably other basins), these\n\tgrids include Oligocene and Miocene horizons that are unconformities in most\n\tareas. A sea floor grid is also included. Except for the sea floor grid, the\n\tgrids are trimmed to be relatively close to control of interpreted seismic\n\tstratigraphy. The grids are provided in two way travel time and in depth. Math\n\tcan be performed on the corresponding time and depth grids to recreate the 3D\n\tinterval velocity model that was used. The velocity of the water used was 1450\n\tm/s. More detailed descriptions of the work are found in the Final NSF report\n\tfor PLR1341585 by C. Sorlien, B. Luyendyk, and D. Wilson. The grids are\n\tcontinuous so are merged with the sea floor where there is outcrop, or with\n\tbasement if there is onlap, or with a young unconformity where there is\n\tsub-bottom truncation. The filenames include the name of the horizon\n\t(unconformity) and whether they are in time or depth. \\\"etc.\\\" means there are\n\ttwo or more horizons that have been merged. Most of the horizons are named and\n\tdefined in the ANTOSTRAT (1995) atlas. The starting points for many of these\n\thorizons are ANTOSTRAT [1995] near DSDP sites 273, 272, and 270. In other areas\n\twe deviate from the interpretation of ANTOSTRAT [1995]. late Oligocene through\n\tmiddle Miocene horizons, interpreted very close to the ANTOSTRAT [1995] at DSDP\n\tSite 273 in Central Trough, are much deeper in our interpretation within Terror\n\tRift. These horizon grids usually include the sea floor where there is outcrop\n\tor acoustic basement (top syn-rift in some basins) where there is onlap. \n\n\n\tANTOSTRAT (1995), Seismic Stratigraphic Atlas of the Ross Sea, in Geology and\n\tSeismic Stratigraphy of the Antarctic Margin, edited by A. K. Cooper, Barker,\n\tP. F., Brancolini, G., 22 plates, American Geophysical Union, Washington,\n\tD.C.", "east": -171.7, "geometry": ["POINT(176.95 -75.945)"], "keywords": "Antarctica; Continental Margin; Geology/Geophysics - Other; Marine Geoscience; Miocene; Oligocene; Seismic Reflection", "locations": "Antarctica", "north": -73.22, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Sorlien, Christopher; Wilson, Douglas S.", "project_titles": "Subsidence, Tilting, Sedimentation, and Oligocene-middle Miocene paleo-depth of Ross Sea", "projects": [{"proj_uid": "p0000271", "repository": "USAP-DC", "title": "Subsidence, Tilting, Sedimentation, and Oligocene-middle Miocene paleo-depth of Ross Sea"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.67, "title": "Ross Sea unconformities digital grids in depth and two-way time", "uid": "601098", "west": 165.6}, {"awards": "1443471 Koutnik, Michelle", "bounds_geometry": ["POLYGON((110 -89,117 -89,124 -89,131 -89,138 -89,145 -89,152 -89,159 -89,166 -89,173 -89,180 -89,180 -89.1,180 -89.2,180 -89.3,180 -89.4,180 -89.5,180 -89.6,180 -89.7,180 -89.8,180 -89.9,180 -90,173 -90,166 -90,159 -90,152 -90,145 -90,138 -90,131 -90,124 -90,117 -90,110 -90,110 -89.9,110 -89.8,110 -89.7,110 -89.6,110 -89.5,110 -89.4,110 -89.3,110 -89.2,110 -89.1,110 -89))"], "date_created": "Fri, 25 May 2018 00:00:00 GMT", "description": "These are 200MHz radar data collected upstream of South Pole during the 2016/17 and 2017/18 field seasons. Data are the raw files produced by the GSSI radar controller, and a set of layer picks.", "east": 180.0, "geometry": ["POINT(145 -89.5)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Radar; Snow Accumulation; Snow/ice; Snow/Ice", "locations": "Antarctica", "north": -89.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Lilien, David; Fudge, T. J.; Koutnik, Michelle; Conway, Howard; Waddington, Edwin D.", "project_titles": "Collaborative Research: Characterization of Upstream Ice and Firn Dynamics affecting the South Pole Ice Core", "projects": [{"proj_uid": "p0000200", "repository": "USAP-DC", "title": "Collaborative Research: Characterization of Upstream Ice and Firn Dynamics affecting the South Pole Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -90.0, "title": "Shallow radar near South Pole", "uid": "601099", "west": 110.0}, {"awards": "1341729 Kirschvink, Joseph", "bounds_geometry": ["POLYGON((-58.9 -63.5,-58.63 -63.5,-58.36 -63.5,-58.09 -63.5,-57.82 -63.5,-57.55 -63.5,-57.28 -63.5,-57.01 -63.5,-56.74 -63.5,-56.47 -63.5,-56.2 -63.5,-56.2 -63.62,-56.2 -63.74,-56.2 -63.86,-56.2 -63.98,-56.2 -64.1,-56.2 -64.22,-56.2 -64.34,-56.2 -64.46,-56.2 -64.58,-56.2 -64.7,-56.47 -64.7,-56.74 -64.7,-57.01 -64.7,-57.28 -64.7,-57.55 -64.7,-57.82 -64.7,-58.09 -64.7,-58.36 -64.7,-58.63 -64.7,-58.9 -64.7,-58.9 -64.58,-58.9 -64.46,-58.9 -64.34,-58.9 -64.22,-58.9 -64.1,-58.9 -63.98,-58.9 -63.86,-58.9 -63.74,-58.9 -63.62,-58.9 -63.5))"], "date_created": "Fri, 27 Apr 2018 00:00:00 GMT", "description": "", "east": -56.2, "geometry": ["POINT(-57.55 -64.1)"], "keywords": "Antarctica; Geochronology; Geology/Geophysics - Other; Glaciology; James Ross Basin; Marine Geoscience; Marine Sediments", "locations": "Antarctica; James Ross Basin", "north": -63.5, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Skinner, Steven; Kirschvink, Joseph", "project_titles": "Paleomagnetism and Magnetostratigraphy of the James Ross Basin, Antarctica", "projects": [{"proj_uid": "p0000276", "repository": "USAP-DC", "title": "Paleomagnetism and Magnetostratigraphy of the James Ross Basin, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.7, "title": "2016 Paleomagnetic samples from the James Ross Basin, Antarctica", "uid": "601094", "west": -58.9}, {"awards": "1142084 Nevitt, Gabrielle", "bounds_geometry": ["POLYGON((40 -25,46 -25,52 -25,58 -25,64 -25,70 -25,76 -25,82 -25,88 -25,94 -25,100 -25,100 -29,100 -33,100 -37,100 -41,100 -45,100 -49,100 -53,100 -57,100 -61,100 -65,94 -65,88 -65,82 -65,76 -65,70 -65,64 -65,58 -65,52 -65,46 -65,40 -65,40 -61,40 -57,40 -53,40 -49,40 -45,40 -41,40 -37,40 -33,40 -29,40 -25))"], "date_created": "Wed, 11 Apr 2018 00:00:00 GMT", "description": "This dataset was recorded from tags fitted to Black-browed Albatross from the breeding colony called \"Canon des Sourcils Noirs\", on Kerguelen Island, located at 70.2433E, -49.6875S. The dataset contains the following items: \r\n1. GPS locations (lat,lon) and timestamps at local time (GMT-5)\r\n2. Timestamped stomach temperature measurements.", "east": 100.0, "geometry": ["POINT(70 -45)"], "keywords": "Albatross; Antarctica; Biota; Birds; Foraging; GPS Data; Southern Ocean; Stomach Temperature", "locations": "Antarctica; Southern Ocean", "north": -25.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Losekoot, Marcel; Nevitt, Gabrielle", "project_titles": "Applying High-resolution GPS Tracking to Characterize Sensory Foraging Strategies of the Black-browed Albatross, a Top Predator of the Southern Ocean Ecosystem", "projects": [{"proj_uid": "p0000420", "repository": "USAP-DC", "title": "Applying High-resolution GPS Tracking to Characterize Sensory Foraging Strategies of the Black-browed Albatross, a Top Predator of the Southern Ocean Ecosystem"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.0, "title": "Satellite tracks of Black-browed Albatross in the Southern Indian Ocean", "uid": "601093", "west": 40.0}, {"awards": "1141978 Foreman, Christine", "bounds_geometry": ["POLYGON((161.1667 -77.117,161.21673 -77.117,161.26676 -77.117,161.31679 -77.117,161.36682 -77.117,161.41685 -77.117,161.46688 -77.117,161.51691 -77.117,161.56694 -77.117,161.61697 -77.117,161.667 -77.117,161.667 -77.117,161.667 -77.117,161.667 -77.117,161.667 -77.117,161.667 -77.117,161.667 -77.117,161.667 -77.117,161.667 -77.117,161.667 -77.117,161.667 -77.117,161.61697 -77.117,161.56694 -77.117,161.51691 -77.117,161.46688 -77.117,161.41685 -77.117,161.36682 -77.117,161.31679 -77.117,161.26676 -77.117,161.21673 -77.117,161.1667 -77.117,161.1667 -77.117,161.1667 -77.117,161.1667 -77.117,161.1667 -77.117,161.1667 -77.117,161.1667 -77.117,161.1667 -77.117,161.1667 -77.117,161.1667 -77.117,161.1667 -77.117))"], "date_created": "Fri, 23 Mar 2018 00:00:00 GMT", "description": "Mass spectra of external metabolites were obtained with a 1290 Ultra Performance Liquid Chromatography system coupled to a 6538 Ultra High Definition Accurate-Mass Quadrupole-Time of Flight mass spectrometer operated in positive mode with an electrospray ionization source (Agilent Technologies). 30 mL of filtered media was concentrated per sample by solid phase extraction. External metabolites were re-suspended in 50% (v/v) acetonitrile, and were separated using a reverse-phase Kinetix 1.7 um C18, 100A, 150 mm - 2.1 mm column. Data presented are from UPLC-Q-TOF measurements of mass to charge ratio, retention time, and replicate-averaged extracted ion chromatogram abundance values (counts) of molecular species that demonstrated a significant change in abundance (Two-way ANOVA, adjusted P\u003c0.01) during incubations based on time point (T0: d0, T1: d27, T2: d63, T3: d98) and carbon source (Cotton Glacier: CG, Pony Lake: PL, Suwannee River: SR).", "east": 161.667, "geometry": ["POINT(161.41685 -77.117)"], "keywords": "Antarctica; Biota; Exometabolites; Mass Spectrometry; Microbes; Microbiology", "locations": "Antarctica", "north": -77.117, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Foreman, Christine; Tigges, Michelle; Bothner, Brian", "project_titles": "Multidimensional \"omics\" characterization of microbial metabolism and dissolved organic matter in Antarctica", "projects": [{"proj_uid": "p0000408", "repository": "USAP-DC", "title": "Multidimensional \"omics\" characterization of microbial metabolism and dissolved organic matter in Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.117, "title": "UPLC-Q-TOF data of Cotton Glacier exometabolites", "uid": "601089", "west": 161.1667}, {"awards": "1542778 Alley, Richard", "bounds_geometry": ["POLYGON((-180 -89.9,-144 -89.9,-108 -89.9,-72 -89.9,-36 -89.9,0 -89.9,36 -89.9,72 -89.9,108 -89.9,144 -89.9,180 -89.9,180 -89.91,180 -89.92,180 -89.93,180 -89.94,180 -89.95,180 -89.96,180 -89.97,180 -89.98,180 -89.99,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -89.99,-180 -89.98,-180 -89.97,-180 -89.96,-180 -89.95,-180 -89.94,-180 -89.93,-180 -89.92,-180 -89.91,-180 -89.9))"], "date_created": "Mon, 05 Mar 2018 00:00:00 GMT", "description": "This dataset includes all visible observations made of the South Pole Ice core within a dark booth during core processing at the National Ice Core Laboratory. This dataset includes observations starting at 735 meters depth, down to the bottom of the drilled core at 1751 meters. All visible and cloudy layers are noted, as well as any other observed feature or cracks. In addition, all Volcanic layers measured on the ECM were noted.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core; Ice Core Records; Physical Properties; Snow/ice; Snow/Ice; South Pole; Visual Observations", "locations": "South Pole; Antarctica", "north": -89.9, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Fegyveresi, John; Alley, Richard", "project_titles": "Climate History and Flow Processes from Physical Analyses of the SPICECORE South Pole Ice Core", "projects": [{"proj_uid": "p0000141", "repository": "USAP-DC", "title": "Climate History and Flow Processes from Physical Analyses of the SPICECORE South Pole Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -90.0, "title": "South Pole Ice Core (SPIcecore) Visual Observations", "uid": "601088", "west": -180.0}, {"awards": "0539578 Alley, Richard", "bounds_geometry": ["POINT(-112.085 -79.467)"], "date_created": "Thu, 01 Mar 2018 00:00:00 GMT", "description": "This dataset contains detailed grain and bubble properties data for a new hybrid analysis study relating bubble elongation to crystal orientations. All data are from a depth of 580 meters in a sample from the WAIS Divide ice core.", "east": -112.085, "geometry": ["POINT(-112.085 -79.467)"], "keywords": "Air Bubbles; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Ice Strain; Physical Ice Properties; Snow/ice; Snow/Ice; Strain", "locations": "Antarctica", "north": -79.467, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Fegyveresi, John; Alley, Richard", "project_titles": "Collaborative Research: Continued Study of Physical Properties of the WAIS Divide Deep Core", "projects": [{"proj_uid": "p0000027", "repository": "USAP-DC", "title": "Collaborative Research: Continued Study of Physical Properties of the WAIS Divide Deep Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.467, "title": "WAIS Divide 580m Bubble and Grain Hybrid Data", "uid": "601087", "west": -112.085}, {"awards": "0943466 Hawley, Robert", "bounds_geometry": ["POLYGON((-163 -79,-162.8 -79,-162.6 -79,-162.4 -79,-162.2 -79,-162 -79,-161.8 -79,-161.6 -79,-161.4 -79,-161.2 -79,-161 -79,-161 -79.05,-161 -79.1,-161 -79.15,-161 -79.2,-161 -79.25,-161 -79.3,-161 -79.35,-161 -79.4,-161 -79.45,-161 -79.5,-161.2 -79.5,-161.4 -79.5,-161.6 -79.5,-161.8 -79.5,-162 -79.5,-162.2 -79.5,-162.4 -79.5,-162.6 -79.5,-162.8 -79.5,-163 -79.5,-163 -79.45,-163 -79.4,-163 -79.35,-163 -79.3,-163 -79.25,-163 -79.2,-163 -79.15,-163 -79.1,-163 -79.05,-163 -79))"], "date_created": "Tue, 13 Feb 2018 00:00:00 GMT", "description": "A Borehole Optical Televiewer (OPTV) uses a conical mirror and scanning electronics to record a continuous 360-degree image of the borehole wall. An inclinometer and magnetometer allow the image to be \u0027unwrapped\u0027 and resented as a rectangular image, which shows the visible features of the wall oriented to magnetic north. This dataset includes both the raw bitmap (bmp) image data from the televiewer, as well as proprietary WellCad format (wcl) files. The WellCad format files contain the inclinometry, orientation, and temperature data in addition to the imagery data. Wellcad files can be viewed with a free wellcad file reader available from https://www.alt.lu/downloads.htm. This dataset includes OPTV logs from each of two seasons, November 2013 and 2014. The logs are of the 760 m deep hole drilled by the RICE project, a NZ-USA partnership.", "east": -161.0, "geometry": ["POINT(-162 -79.25)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Roosevelt Island; Snow/ice; Snow/Ice", "locations": "Roosevelt Island; Antarctica", "north": -79.0, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Glaciology", "persons": "Hawley, Robert L.; Clemens-Sewall, David", "project_titles": "Collaborative Research: Deglaciation of the Ross Sea Embayment - constraints from Roosevelt Island", "projects": [{"proj_uid": "p0000272", "repository": "USAP-DC", "title": "Collaborative Research: Deglaciation of the Ross Sea Embayment - constraints from Roosevelt Island"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.5, "title": "Roosevelt Island Borehole Optical Televiewer logs", "uid": "601086", "west": -163.0}, {"awards": "1565576 Pettit, Erin", "bounds_geometry": ["POLYGON((-63 -64.75,-62.6 -64.75,-62.2 -64.75,-61.8 -64.75,-61.4 -64.75,-61 -64.75,-60.6 -64.75,-60.2 -64.75,-59.8 -64.75,-59.4 -64.75,-59 -64.75,-59 -64.9,-59 -65.05,-59 -65.2,-59 -65.35,-59 -65.5,-59 -65.65,-59 -65.8,-59 -65.95,-59 -66.1,-59 -66.25,-59.4 -66.25,-59.8 -66.25,-60.2 -66.25,-60.6 -66.25,-61 -66.25,-61.4 -66.25,-61.8 -66.25,-62.2 -66.25,-62.6 -66.25,-63 -66.25,-63 -66.1,-63 -65.95,-63 -65.8,-63 -65.65,-63 -65.5,-63 -65.35,-63 -65.2,-63 -65.05,-63 -64.9,-63 -64.75))"], "date_created": "Tue, 13 Feb 2018 00:00:00 GMT", "description": "Weather and instrument data from the Automated Meterology Ice Geophysics Observation System (AMIGOS) stations installed as part of the LARISSA and RAPID Scar Inlet funded grants from NSF-PLR. The data include temperature, wind, pressure, humidity, station position (coarse), and station health.", "east": -59.0, "geometry": ["POINT(-61 -65.5)"], "keywords": "Antarctica; Antarctic Peninsula; Atmosphere; Automated Weather Station; Flask Glacier; Foehn Winds; Glaciers/ice Sheet; Glaciers/Ice Sheet; LARISSA; Larsen B Ice Shelf; Meteorology; Scar Inlet; Weatherstation; Wind Speed", "locations": "Antarctica; Antarctic Peninsula; Larsen B Ice Shelf; Scar Inlet; Flask Glacier", "north": -64.75, "nsf_funding_programs": "Antarctic Integrated System Science; Antarctic Glaciology", "persons": "Scambos, Ted", "project_titles": "RAPID: Observing the Disintegration of the Scar Inlet Ice Shelf", "projects": [{"proj_uid": "p0000274", "repository": "USAP-DC", "title": "RAPID: Observing the Disintegration of the Scar Inlet Ice Shelf"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "LARISSA", "south": -66.25, "title": "Weather data from LARISSA / SCAR Inlet Rapid AMIGOS and cGPS stations", "uid": "601084", "west": -63.0}, {"awards": "0943466 Hawley, Robert", "bounds_geometry": ["POLYGON((-163 -79,-162.8 -79,-162.6 -79,-162.4 -79,-162.2 -79,-162 -79,-161.8 -79,-161.6 -79,-161.4 -79,-161.2 -79,-161 -79,-161 -79.05,-161 -79.1,-161 -79.15,-161 -79.2,-161 -79.25,-161 -79.3,-161 -79.35,-161 -79.4,-161 -79.45,-161 -79.5,-161.2 -79.5,-161.4 -79.5,-161.6 -79.5,-161.8 -79.5,-162 -79.5,-162.2 -79.5,-162.4 -79.5,-162.6 -79.5,-162.8 -79.5,-163 -79.5,-163 -79.45,-163 -79.4,-163 -79.35,-163 -79.3,-163 -79.25,-163 -79.2,-163 -79.15,-163 -79.1,-163 -79.05,-163 -79))"], "date_created": "Tue, 13 Feb 2018 00:00:00 GMT", "description": "These data are firn temperatures, measured by a meteorological station placed at Roosevelt Island. Thermistors were placed at multiple depths through the upper 20 meters of firn and measured through the course of roughly one year.", "east": -161.0, "geometry": ["POINT(-162 -79.25)"], "keywords": "Antarctica; Borehole; Firn; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice; Ice Core Records; Ice Fabric; Optical Images; Roosevelt Island; Snow/ice; Snow/Ice; Temperature", "locations": "Antarctica; Roosevelt Island", "north": -79.0, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Earth Sciences", "persons": "Hawley, Robert L.; Clemens-Sewall, David; Giese, Alexandra", "project_titles": "Collaborative Research: Deglaciation of the Ross Sea Embayment - constraints from Roosevelt Island", "projects": [{"proj_uid": "p0000272", "repository": "USAP-DC", "title": "Collaborative Research: Deglaciation of the Ross Sea Embayment - constraints from Roosevelt Island"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.5, "title": "Roosevelt Island Borehole Firn temperatures", "uid": "601085", "west": -163.0}, {"awards": "1246353 Anderson, John", "bounds_geometry": ["POLYGON((-180 -74.37,-178.85 -74.37,-177.7 -74.37,-176.55 -74.37,-175.4 -74.37,-174.25 -74.37,-173.1 -74.37,-171.95 -74.37,-170.8 -74.37,-169.65 -74.37,-168.5 -74.37,-168.5 -74.747,-168.5 -75.124,-168.5 -75.501,-168.5 -75.878,-168.5 -76.255,-168.5 -76.632,-168.5 -77.009,-168.5 -77.386,-168.5 -77.763,-168.5 -78.14,-169.65 -78.14,-170.8 -78.14,-171.95 -78.14,-173.1 -78.14,-174.25 -78.14,-175.4 -78.14,-176.55 -78.14,-177.7 -78.14,-178.85 -78.14,180 -78.14,178.48 -78.14,176.96 -78.14,175.44 -78.14,173.92 -78.14,172.4 -78.14,170.88 -78.14,169.36 -78.14,167.84 -78.14,166.32 -78.14,164.8 -78.14,164.8 -77.763,164.8 -77.386,164.8 -77.009,164.8 -76.632,164.8 -76.255,164.8 -75.878,164.8 -75.501,164.8 -75.124,164.8 -74.747,164.8 -74.37,166.32 -74.37,167.84 -74.37,169.36 -74.37,170.88 -74.37,172.4 -74.37,173.92 -74.37,175.44 -74.37,176.96 -74.37,178.48 -74.37,-180 -74.37))"], "date_created": "Mon, 05 Feb 2018 00:00:00 GMT", "description": "Dataset includes details of cores collected as part of cruise NBP1502A, a list of radiocarbon-dated samples and samples to be radiocarbon-dated, and grain-size data from select NBP1502A cores.", "east": -168.5, "geometry": ["POINT(178.15 -76.255)"], "keywords": "Antarctica; Chemistry:sediment; Chemistry:Sediment; Geochronology; Marine Geoscience; Marine Sediments; NBP1502; R/v Nathaniel B. Palmer; Sediment Core", "locations": "Antarctica", "north": -74.37, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Simkins, Lauren; Anderson, John; Prothro, Lindsay", "project_titles": "Evidence for Paleo Ice Stream Collapse in the Western Ross Sea since the Last Glacial Maximum.", "projects": [{"proj_uid": "p0000395", "repository": "USAP-DC", "title": "Evidence for Paleo Ice Stream Collapse in the Western Ross Sea since the Last Glacial Maximum."}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.14, "title": "NBP1502A Cruise Core Data", "uid": "601083", "west": 164.8}, {"awards": "1341669 DeMaster, David", "bounds_geometry": ["POLYGON((-70 -62,-68.8 -62,-67.6 -62,-66.4 -62,-65.2 -62,-64 -62,-62.8 -62,-61.6 -62,-60.4 -62,-59.2 -62,-58 -62,-58 -62.6,-58 -63.2,-58 -63.8,-58 -64.4,-58 -65,-58 -65.6,-58 -66.2,-58 -66.8,-58 -67.4,-58 -68,-59.2 -68,-60.4 -68,-61.6 -68,-62.8 -68,-64 -68,-65.2 -68,-66.4 -68,-67.6 -68,-68.8 -68,-70 -68,-70 -67.4,-70 -66.8,-70 -66.2,-70 -65.6,-70 -65,-70 -64.4,-70 -63.8,-70 -63.2,-70 -62.6,-70 -62))"], "date_created": "Sat, 03 Feb 2018 00:00:00 GMT", "description": "This file has C-14 data from the organic matter fraction of Antarctic marine sediments, collected from the collapsed Larsen Ice Shelf and the West Antarctic Peninsula", "east": -58.0, "geometry": ["POINT(-64 -65)"], "keywords": null, "locations": null, "north": -62.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "DeMaster, David", "project_titles": "Using Radiochemical Data from Collapsed Ice Shelf Sediments to Understand the Nature and Timing of the Benthic Response to High-Latitude Climate Change", "projects": [{"proj_uid": "p0000382", "repository": "USAP-DC", "title": "Using Radiochemical Data from Collapsed Ice Shelf Sediments to Understand the Nature and Timing of the Benthic Response to High-Latitude Climate Change"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "LARISSA", "south": -68.0, "title": "DeMaster Compiled Larsen Ice Shelf and the West Antarctic Peninsula C14 Data", "uid": "601082", "west": -70.0}, {"awards": "1141411 Baker, Ian", "bounds_geometry": null, "date_created": "Tue, 23 Jan 2018 00:00:00 GMT", "description": "Raw data is provided for mechanical testing of doped and undoped polycrystalline samples of ice as well as the microstructural characterization of these post-mortem specimens.", "east": null, "geometry": null, "keywords": null, "locations": null, "north": null, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Hammonds, Kevin", "project_titles": "The Effects of Soluble Impurities on the Flow and Fabric of Polycrystalline Ice", "projects": [{"proj_uid": "p0010133", "repository": "USAP-DC", "title": "The Effects of Soluble Impurities on the Flow and Fabric of Polycrystalline Ice"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Laboratory Experiments with H2SO4-Doped Ice", "uid": "601081", "west": null}, {"awards": "1245899 Kowalewski, Douglas", "bounds_geometry": ["POLYGON((160 -70,168 -70,176 -70,184 -70,192 -70,200 -70,208 -70,216 -70,224 -70,232 -70,240 -70,240 -71.5,240 -73,240 -74.5,240 -76,240 -77.5,240 -79,240 -80.5,240 -82,240 -83.5,240 -85,232 -85,224 -85,216 -85,208 -85,200 -85,192 -85,184 -85,176 -85,168 -85,160 -85,160 -83.5,160 -82,160 -80.5,160 -79,160 -77.5,160 -76,160 -74.5,160 -73,160 -71.5,160 -70))"], "date_created": "Tue, 16 Jan 2018 00:00:00 GMT", "description": "Data here is output from regional climate modeling to shed light on the range of possible environmental conditions in the McMurdo region during periods of grounded ice expansion and recession during the Plio-Pleistocene.", "east": 240.0, "geometry": ["POINT(-160 -77.5)"], "keywords": "Antarctica; Climate Model; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Sheet Model; McMurdo; Paleoclimate; Ross Sea", "locations": "Antarctica; Ross Sea; McMurdo", "north": -70.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Kowalewski, Douglas", "project_titles": "Collaborative Research: West Antarctic Ice Sheet stability, Alpine Glaciation, and Climate Variability: a Terrestrial Perspective from Cosmogenic-nuclide Dating in McMurdo Sound", "projects": [{"proj_uid": "p0000391", "repository": "USAP-DC", "title": "Collaborative Research: West Antarctic Ice Sheet stability, Alpine Glaciation, and Climate Variability: a Terrestrial Perspective from Cosmogenic-nuclide Dating in McMurdo Sound"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -85.0, "title": "Region Climate Model Output Plio-Pleistocene", "uid": "601080", "west": 160.0}, {"awards": "1043528 Alley, Richard", "bounds_geometry": ["POINT(-112.085 -79.467)"], "date_created": "Tue, 16 Jan 2018 00:00:00 GMT", "description": "This dataset includes all surface, snowpit, crust, AWS, and near-surface thermistor data used for analyses and publication \"Surface formation, preservation, and history of low-porosity crusts at the WAIS Divide site, West Antarctica\" DOI: https://doi.org/10.5194/tc-12-1-2018", "east": -112.085, "geometry": ["POINT(-112.085 -79.467)"], "keywords": "Antarctica; Atmosphere; AWS; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Meteorology; Physical Properties; Snow Pit; Temperature; WAIS Divide; WAIS Divide Ice Core; Weatherstation", "locations": "Antarctica; WAIS Divide", "north": -79.467, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Fegyveresi, John; Alley, Richard", "project_titles": "Collaborative Research: Continued Study of Physical Properties of the WAIS Divide Deep Core; Collaborative Research: Physical Properties of the WAIS Divide Deep Core", "projects": [{"proj_uid": "p0000038", "repository": "USAP-DC", "title": "Collaborative Research: Physical Properties of the WAIS Divide Deep Core"}, {"proj_uid": "p0000027", "repository": "USAP-DC", "title": "Collaborative Research: Continued Study of Physical Properties of the WAIS Divide Deep Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.467, "title": "WAIS Divide Surface and Snow-pit Data, 2009-2013", "uid": "601079", "west": -112.085}, {"awards": "1565576 Pettit, Erin", "bounds_geometry": ["POLYGON((-62.2 -65.5,-62.12 -65.5,-62.04 -65.5,-61.96 -65.5,-61.88 -65.5,-61.8 -65.5,-61.72 -65.5,-61.64 -65.5,-61.56 -65.5,-61.48 -65.5,-61.4 -65.5,-61.4 -65.53,-61.4 -65.56,-61.4 -65.59,-61.4 -65.62,-61.4 -65.65,-61.4 -65.68,-61.4 -65.71,-61.4 -65.74,-61.4 -65.77,-61.4 -65.8,-61.48 -65.8,-61.56 -65.8,-61.64 -65.8,-61.72 -65.8,-61.8 -65.8,-61.88 -65.8,-61.96 -65.8,-62.04 -65.8,-62.12 -65.8,-62.2 -65.8,-62.2 -65.77,-62.2 -65.74,-62.2 -65.71,-62.2 -65.68,-62.2 -65.65,-62.2 -65.62,-62.2 -65.59,-62.2 -65.56,-62.2 -65.53,-62.2 -65.5))"], "date_created": "Wed, 20 Dec 2017 00:00:00 GMT", "description": "A terrestrial radar interferometer was set up at a location overlooking a remnant of the Larsen B iceshelf and the adjacent fast ice. Images were acquired every 4 minutes with a Gamma Portable Radar Interferometer - 2. Data include images from two antennas, to allow the generation of interferometric DEMs, as well as line-of-sight displacement fields between consecutive images. The archived data are single-look complex (SLC) images, together with parameter files.", "east": -61.4, "geometry": ["POINT(-61.8 -65.65)"], "keywords": "Antarctica; Antarctic Peninsula; Elevation; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Navigation; Radar; Radar Interferometer", "locations": "Antarctica; Antarctic Peninsula", "north": -65.5, "nsf_funding_programs": "Antarctic Integrated System Science; Antarctic Glaciology", "persons": "Truffer, Martin", "project_titles": "RAPID: Observing the Disintegration of the Scar Inlet Ice Shelf", "projects": [{"proj_uid": "p0000274", "repository": "USAP-DC", "title": "RAPID: Observing the Disintegration of the Scar Inlet Ice Shelf"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.8, "title": "Scar Inlet Terrestrial Radar Interferometry", "uid": "601078", "west": -62.2}, {"awards": "1141978 Foreman, Christine", "bounds_geometry": ["POINT(161.667 -77.117)"], "date_created": "Tue, 19 Dec 2017 00:00:00 GMT", "description": "Metadata presented include Fourier transform ion cyclotron resonance mass spectrometry characterization of carbon source material molecular composition for three isolated lyophilized OM samples: Cotton Glacier Supraglacial stream, IHSS Pony Lake, and IHSS Suwannee River", "east": 161.667, "geometry": ["POINT(161.667 -77.117)"], "keywords": "Antarctica; Biota; Chemistry:fluid; Chemistry:Fluid; Fluorescence Spectroscopy; Mass Spectrometry", "locations": "Antarctica", "north": -77.117, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "D\u0027Andrilli, Juliana; Foreman, Christine", "project_titles": "Multidimensional \"omics\" characterization of microbial metabolism and dissolved organic matter in Antarctica", "projects": [{"proj_uid": "p0000408", "repository": "USAP-DC", "title": "Multidimensional \"omics\" characterization of microbial metabolism and dissolved organic matter in Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.117, "title": "FT-ICR MS Metadata", "uid": "601077", "west": 161.667}, {"awards": "1141978 Foreman, Christine", "bounds_geometry": ["POINT(161.667 -77.117)"], "date_created": "Tue, 19 Dec 2017 00:00:00 GMT", "description": "Metadata presented include high resolution respiration data from Janthinobacterium sp. CG3 for three dissolved organic matter samples Cotton Glacier Supraglacial stream, Pony Lake fulvic acid, and Suwannee River Natural Organic Matter (NOM).", "east": 161.667, "geometry": ["POINT(161.667 -77.117)"], "keywords": "Antarctica; Biota; Chemistry:fluid; Chemistry:Fluid; Fluorescence Spectroscopy; Mass Spectrometry", "locations": "Antarctica", "north": -77.117, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Foreman, Christine; Smith, Heidi", "project_titles": "Multidimensional \"omics\" characterization of microbial metabolism and dissolved organic matter in Antarctica", "projects": [{"proj_uid": "p0000408", "repository": "USAP-DC", "title": "Multidimensional \"omics\" characterization of microbial metabolism and dissolved organic matter in Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.117, "title": "Respiration Metadata", "uid": "601076", "west": 161.667}, {"awards": "1246203 Gooseff, Michael", "bounds_geometry": ["POLYGON((163.1778 -77.6233,163.17792 -77.6233,163.17804 -77.6233,163.17816 -77.6233,163.17828 -77.6233,163.1784 -77.6233,163.17852 -77.6233,163.17864 -77.6233,163.17876 -77.6233,163.17888 -77.6233,163.179 -77.6233,163.179 -77.63331,163.179 -77.64332,163.179 -77.65333,163.179 -77.66334,163.179 -77.67335,163.179 -77.68336,163.179 -77.69337,163.179 -77.70338,163.179 -77.71339,163.179 -77.7234,163.17888 -77.7234,163.17876 -77.7234,163.17864 -77.7234,163.17852 -77.7234,163.1784 -77.7234,163.17828 -77.7234,163.17816 -77.7234,163.17804 -77.7234,163.17792 -77.7234,163.1778 -77.7234,163.1778 -77.71339,163.1778 -77.70338,163.1778 -77.69337,163.1778 -77.68336,163.1778 -77.67335,163.1778 -77.66334,163.1778 -77.65333,163.1778 -77.64332,163.1778 -77.63331,163.1778 -77.6233))"], "date_created": "Mon, 18 Dec 2017 00:00:00 GMT", "description": "As a part of the project titled \"Collaborative Research: The McMurdo Dry Valleys: A landscape on the threshold of change\", we measured ground temperatures from 0-20cm at three stream bank positions (base, mid-slope, and top) at 4 locations along Crescent Stream in Taylor Valley - 2 on the east bank, 2 on the west bank. The goal was to evaluate differences in thermal conduction and temperature dynamics of the active layers of these locations, in particular, in a stream that has undergone extensive bank erosion since 2012 due to permafrost degradation. One of the datalogging stations had significant technical problems and has very little data compared to the almost 2 years of temperature date from the other 3 stations (2015-2017). ", "east": 163.179, "geometry": ["POINT(163.1784 -77.67335)"], "keywords": "Antarctica; Dry Valleys; Glaciology; Paleoclimate; Permafrost; Soil Temperature; Taylor Valley", "locations": "Dry Valleys; Antarctica; Taylor Valley", "north": -77.6233, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Gooseff, Michael N.", "project_titles": "Collaborative Research: THE MCMURDO DRY VALLEYS: A landscape on the Threshold of Change", "projects": [{"proj_uid": "p0000076", "repository": "USAP-DC", "title": "Collaborative Research: THE MCMURDO DRY VALLEYS: A landscape on the Threshold of Change"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.7234, "title": "Active Layer Temperatures from Crescent Stream banks, Taylor Valley Antarctica", "uid": "601075", "west": 163.1778}, {"awards": "0732917 McCormick, Michael", "bounds_geometry": ["POLYGON((299.4 -63.1,299.92 -63.1,300.44 -63.1,300.96 -63.1,301.48 -63.1,302 -63.1,302.52 -63.1,303.04 -63.1,303.56 -63.1,304.08 -63.1,304.6 -63.1,304.6 -63.29,304.6 -63.48,304.6 -63.67,304.6 -63.86,304.6 -64.05,304.6 -64.24,304.6 -64.43,304.6 -64.62,304.6 -64.81,304.6 -65,304.08 -65,303.56 -65,303.04 -65,302.52 -65,302 -65,301.48 -65,300.96 -65,300.44 -65,299.92 -65,299.4 -65,299.4 -64.81,299.4 -64.62,299.4 -64.43,299.4 -64.24,299.4 -64.05,299.4 -63.86,299.4 -63.67,299.4 -63.48,299.4 -63.29,299.4 -63.1))"], "date_created": "Sun, 17 Dec 2017 00:00:00 GMT", "description": "Ice-shelf loss along the east coast of the Antarctic Peninsula over recent decades has brought new sources of carbon and energy to the marine benthos likely affecting sediment geochemistry and microbial community composition. To better understand the long-term effects of ice-shelf loss on benthic microbial communities, we conducted a five-station survey along a 160 km transect following the historic path of retreat of the Larsen A ice shelf. All microbial community sequence data is publicly available through the Metagenomics Analysis Server at Argonne National Laboratory (MG-RAST). The project title is \"Impact of ice-shelf loss on geochemical profiles and microbial community composition in marine sediments of the Larsen A embayment, Antarctic Peninsula\". A key word search using terms from this title at the MG-RAST portal (http://metagenomics.anl.gov/) will return the complete sample list. This submitted dataset summarizes the measured environmental parameters for these same samples (lat., long., water depth, sediment depth, pH, alkalinity, dissolved oxygen, silicate, phosphate, nitrate, nitrite, and ammonium).", "east": 304.6, "geometry": ["POINT(-58 -64.05)"], "keywords": "Antarctica; Antarctic Peninsula; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; LARISSA; Microbiology", "locations": "Antarctic Peninsula; Antarctica", "north": -63.1, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "McCormick, Michael", "project_titles": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach - Marine Ecosystems.", "projects": [{"proj_uid": "p0010135", "repository": "USAP-DC", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach - Marine Ecosystems."}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.0, "title": "LARISSA: Impact of ice-shelf loss on geochemical profiles and microbial community composition in marine sediments of the Larsen A embayment, Antarctic Peninsula", "uid": "601073", "west": 299.4}, {"awards": "1141939 Lubin, Dan", "bounds_geometry": ["POLYGON((166.31 -77.5203,166.38265 -77.5203,166.4553 -77.5203,166.52795 -77.5203,166.6006 -77.5203,166.67325 -77.5203,166.7459 -77.5203,166.81855 -77.5203,166.8912 -77.5203,166.96385 -77.5203,167.0365 -77.5203,167.0365 -77.52527,167.0365 -77.53024,167.0365 -77.53521,167.0365 -77.54018,167.0365 -77.54515,167.0365 -77.55012,167.0365 -77.55509,167.0365 -77.56006,167.0365 -77.56503,167.0365 -77.57,166.96385 -77.57,166.8912 -77.57,166.81855 -77.57,166.7459 -77.57,166.67325 -77.57,166.6006 -77.57,166.52795 -77.57,166.4553 -77.57,166.38265 -77.57,166.31 -77.57,166.31 -77.56503,166.31 -77.56006,166.31 -77.55509,166.31 -77.55012,166.31 -77.54515,166.31 -77.54018,166.31 -77.53521,166.31 -77.53024,166.31 -77.52527,166.31 -77.5203))"], "date_created": "Tue, 12 Dec 2017 00:00:00 GMT", "description": "In this project we made fundamental measurements of cloud optical and microphysical properties at Ross Island, Antarctica, using a versatile shortwave spectroradiometer (Panalytical, Inc.) acquired for atmospheric field research by the Scripps Institution of Oceanography (SIO). This instrument measures downwelling spectral irradiance at the Earth surface in the wavelength interval 350-2200 nm. From this data set one can retrieve properties of coastal Antarctic stratiform clouds including optical depth, thermodynamic phase, liquid water droplet effective radius, and ice cloud effective particle size. The instrument was installed at Arrival Heights, and measurements were made from 10 October 2012 to 4 February 2013. Spectral data recorded in one-minute averages, with some gaps for instrument maintenance and data backup, and some occasional down time when the site was inaccessible. Active satellite remote sensing data (CloudSat and CALIPSO) were used for validation and interpretation of the spectroradiometer retrievals (Scott and Lubin 2014).\r\n\t\r\n\t\u003cbr\u003e\u003cbr\u003eThere are two reasons why this measurement program remains timely. One straightforward reason involves the location of McMurdo Station, which is the US Antarctic Programs air transport entry point to the continent. Improvements in our knowledge of atmospheric physics in this region can eventually lead to improvements in numerical weather forecasting relevant to aviation. A second reason involves the recent advances in cloud microphysics for global climate model simulation. Mixed-phase cloud parameterizations have become very sophisticated, requiring validation with each new improvement. Traditional observational test cases - from the Arctic or mid-latitude storm systems - are often quite complex. A coastal Antarctic site at very high latitudes can provide more straightforward cases for testing current microphysical parameterizations. Over Ross Island aerosol and cloud nucleation sources are essentially all natural and oceanic, and cloud geometry is simple, while at the same time there is abundant supercooled cloud liquid water.\r\n\t\r\n\t\u003cbr\u003e\u003cbr\u003eAncillary meteorological data from the McMurdo Weather Office are also included here for help in interpreting the spectroradiometer data, including rawinsonde profiles, surface weather observations from the active ice runway, and automated FMQ19 surface weather measurements from Williams Field and Pegasus runway. For interpretation of clear sky or nearly cloud-free irradiance spectra (i.e., when a large fraction of the irradiance is directional from the Sun and not diffused by clouds), we recommend consulting Meywerk and Ramanathan (1999) for information about the Panalytical instruments cosine response.", "east": 167.0365, "geometry": ["POINT(166.67325 -77.54515)"], "keywords": "Antarctica; Atmosphere; Meteorology; Radiosounding; Ross Island", "locations": "Ross Island; Antarctica", "north": -77.5203, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Lubin, Dan", "project_titles": "Antarctic Cloud Physics: Fundamental Observations from Ross Island", "projects": [{"proj_uid": "p0000327", "repository": "USAP-DC", "title": "Antarctic Cloud Physics: Fundamental Observations from Ross Island"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.57, "title": "Shortwave Spectroradiometer Data from Ross Island, Antarctica", "uid": "601074", "west": 166.31}, {"awards": "0839075 Priscu, John", "bounds_geometry": ["POINT(-112 -79)"], "date_created": "Tue, 12 Dec 2017 00:00:00 GMT", "description": "This data set includes raw concentration of prokaryotic cells for the WAIS Divide deep core, WDC06A, from 1,764 m to 2,709 m. Data were collected by a method that combines acquisition of discrete samples using a continuous ice-core melting system (McConnell et al., 2002) coupled with flow cytometry of DNA-stained samples. The method is described in detail in Santibanez et al., 2016. \r\r\nWe present the first long-term, highly resolved prokaryotic cell concentration record obtained from a polar ice core. This record, obtained from the West Antarctic Ice Sheet (WAIS) Divide (WD) ice core, spanned from the Last Glacial Maximum (LGM) to the early Holocene (EH) and showed distinct fluctuations in prokaryotic cell concentration coincident with major climatic states. This record provided strong evidence that airborne prokaryotic cell deposition differed during the LGM, LDG and EH, and that these changes in cell densities could be explained by different environmental conditions during each of these climatic periods. Our observations provide the first ice core time-series evidence for a prokaryotic response to long-term climatic and environmental processes.", "east": -112.0, "geometry": ["POINT(-112 -79)"], "keywords": "Antarctica; Biota; Cell Counts; Glaciology; Microbiology; WAIS Divide; WAIS Divide Ice Core", "locations": "WAIS Divide; Antarctica", "north": -79.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Santibanez, Pamela; Priscu, John", "project_titles": "Collaborative Research: Integrated High Resolution Chemical and Biological Measurements on the Deep WAIS Divide Core", "projects": [{"proj_uid": "p0000273", "repository": "USAP-DC", "title": "Collaborative Research: Integrated High Resolution Chemical and Biological Measurements on the Deep WAIS Divide Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.0, "title": "Prokaryotic cell concentration record from the WAIS Divide ice core", "uid": "601072", "west": -112.0}, {"awards": "1344349 Tulaczyk, Slawek", "bounds_geometry": ["POLYGON((161.6 -77.4,162.14 -77.4,162.68 -77.4,163.22 -77.4,163.76 -77.4,164.3 -77.4,164.84 -77.4,165.38 -77.4,165.92 -77.4,166.46 -77.4,167 -77.4,167 -77.437,167 -77.474,167 -77.511,167 -77.548,167 -77.585,167 -77.622,167 -77.659,167 -77.696,167 -77.733,167 -77.77,166.46 -77.77,165.92 -77.77,165.38 -77.77,164.84 -77.77,164.3 -77.77,163.76 -77.77,163.22 -77.77,162.68 -77.77,162.14 -77.77,161.6 -77.77,161.6 -77.733,161.6 -77.696,161.6 -77.659,161.6 -77.622,161.6 -77.585,161.6 -77.548,161.6 -77.511,161.6 -77.474,161.6 -77.437,161.6 -77.4))"], "date_created": "Tue, 05 Dec 2017 00:00:00 GMT", "description": "This dataset contains raw TEM data and inverted electrical resistivity data. The raw data were collected using a helicopter-borne sensor in November/December 2011 in collaboration with Drs. Esben Auken (University of Aarhus), Jill Mikucki (University of Tennessee - Knoxville) and Ross Virginia (Dartmouth College). Details on data collection and processing are provided in Mikucki et al. (2015) and Foley et al. (2015). We request that these two references be cited in any future publications based on the archived dataset. ", "east": 167.0, "geometry": ["POINT(164.3 -77.585)"], "keywords": "Antarctica; Dry Valleys; Electromagnetic Data; Geology/Geophysics - Other; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; McMurdo", "locations": "Dry Valleys; McMurdo; Antarctica", "north": -77.4, "nsf_funding_programs": "Antarctic Integrated System Science; Antarctic Earth Sciences", "persons": "Tulaczyk, Slawek", "project_titles": "Collaborative Research: EAGER: Processing, Interpretation and Dissemination of the Proof-of-Concept Transient Electromagnetic Survey of the McMurdo Dry Valleys Region", "projects": [{"proj_uid": "p0000329", "repository": "USAP-DC", "title": "Collaborative Research: EAGER: Processing, Interpretation and Dissemination of the Proof-of-Concept Transient Electromagnetic Survey of the McMurdo Dry Valleys Region"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.77, "title": "2011 Time-domain ElectroMagnetics data for McMurdo Dry Valleys", "uid": "601071", "west": 161.6}, {"awards": "0944307 Conway, Howard", "bounds_geometry": ["POLYGON((-162.83 -79.15,-162.637 -79.15,-162.444 -79.15,-162.251 -79.15,-162.058 -79.15,-161.865 -79.15,-161.672 -79.15,-161.479 -79.15,-161.286 -79.15,-161.093 -79.15,-160.9 -79.15,-160.9 -79.1885037,-160.9 -79.2270074,-160.9 -79.2655111,-160.9 -79.3040148,-160.9 -79.3425185,-160.9 -79.3810222,-160.9 -79.4195259,-160.9 -79.4580296,-160.9 -79.4965333,-160.9 -79.535037,-161.093 -79.535037,-161.286 -79.535037,-161.479 -79.535037,-161.672 -79.535037,-161.865 -79.535037,-162.058 -79.535037,-162.251 -79.535037,-162.444 -79.535037,-162.637 -79.535037,-162.83 -79.535037,-162.83 -79.4965333,-162.83 -79.4580296,-162.83 -79.4195259,-162.83 -79.3810222,-162.83 -79.3425185,-162.83 -79.3040148,-162.83 -79.2655111,-162.83 -79.2270074,-162.83 -79.1885037,-162.83 -79.15))"], "date_created": "Thu, 16 Nov 2017 00:00:00 GMT", "description": "Ground-based radar data include radar echograms and .mat files of internal stratigraphy. Also included are picks of ice thickness and surface elevation. \u003cbr\u003e GPS data include positions of 142 poles set in 2010 and resurveyed in 2012. Also given are velocity vectors for the poles. ", "east": -160.9, "geometry": ["POINT(-161.865 -79.3425185)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; GPS Data; Ice Velocity; Navigation; Radar; Roosevelt Island; Ross Sea", "locations": "Roosevelt Island; Antarctica; Ross Sea", "north": -79.15, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Earth Sciences", "persons": "Conway, Howard", "project_titles": "Collaborative Research: Deglaciation of the Ross Sea Embayment - constraints from Roosevelt Island", "projects": [{"proj_uid": "p0000272", "repository": "USAP-DC", "title": "Collaborative Research: Deglaciation of the Ross Sea Embayment - constraints from Roosevelt Island"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.535037, "title": "Roosevelt Island: Radar and GPS", "uid": "601070", "west": -162.83}, {"awards": "1143834 Huber, Bruce", "bounds_geometry": ["POINT(120.5 -66.2)"], "date_created": "Wed, 15 Nov 2017 00:00:00 GMT", "description": "Time series of temperature and salinity from a sediment trap mooring deployed during NBP1402 on 04 March 2014 at 66S 11, 122 E 30.2, depth 547 m. The mooring was recovered from Aurora Australis on 26 December 2014 ", "east": 120.5, "geometry": ["POINT(120.5 -66.2)"], "keywords": "Antarctica; Mooring; NBP1402; Oceans; Physical Oceanography; Sabrina Coast; Sample/collection Description; Sample/Collection Description; Southern Ocean", "locations": "Sabrina Coast; Southern Ocean; Antarctica", "north": -66.2, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Huber, Bruce", "project_titles": "Collaborative Research: Totten Glacier System and the Marine Record of Cryosphere - Ocean Dynamics", "projects": [{"proj_uid": "p0000008", "repository": "USAP-DC", "title": "Collaborative Research: Totten Glacier System and the Marine Record of Cryosphere - Ocean Dynamics"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -66.2, "title": "Sabrina Coast mooring data - sediment trap mooring 2014", "uid": "601069", "west": 120.5}, {"awards": "1143834 Huber, Bruce", "bounds_geometry": ["POLYGON((117 -66,119.9 -66,122.8 -66,125.7 -66,128.6 -66,131.5 -66,134.4 -66,137.3 -66,140.2 -66,143.1 -66,146 -66,146 -66.1,146 -66.2,146 -66.3,146 -66.4,146 -66.5,146 -66.6,146 -66.7,146 -66.8,146 -66.9,146 -67,143.1 -67,140.2 -67,137.3 -67,134.4 -67,131.5 -67,128.6 -67,125.7 -67,122.8 -67,119.9 -67,117 -67,117 -66.9,117 -66.8,117 -66.7,117 -66.6,117 -66.5,117 -66.4,117 -66.3,117 -66.2,117 -66.1,117 -66))"], "date_created": "Wed, 15 Nov 2017 00:00:00 GMT", "description": "Lowered Acoustic Doppler Current Profiler (LADCP) data collected concurrently with 15 CTD profiles during NBP1402. The LADCP acquires profiles of water current, expressed as U and V components (E-W and N-S).", "east": 146.0, "geometry": ["POINT(131.5 -66.5)"], "keywords": "ADCP Acoustic Doppler Current Profiler; Antarctica; NBP1402; Oceans; Physical Oceanography; Sabrina Coast; Sample/collection Description; Sample/Collection Description; Southern Ocean", "locations": "Antarctica; Southern Ocean; Sabrina Coast", "north": -66.0, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Huber, Bruce", "project_titles": "Collaborative Research: Totten Glacier System and the Marine Record of Cryosphere - Ocean Dynamics", "projects": [{"proj_uid": "p0000008", "repository": "USAP-DC", "title": "Collaborative Research: Totten Glacier System and the Marine Record of Cryosphere - Ocean Dynamics"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -67.0, "title": "NBP1402 Lowered ADCP data", "uid": "601068", "west": 117.0}, {"awards": "1143834 Huber, Bruce", "bounds_geometry": ["POLYGON((117 -66,119.9 -66,122.8 -66,125.7 -66,128.6 -66,131.5 -66,134.4 -66,137.3 -66,140.2 -66,143.1 -66,146 -66,146 -66.1,146 -66.2,146 -66.3,146 -66.4,146 -66.5,146 -66.6,146 -66.7,146 -66.8,146 -66.9,146 -67,143.1 -67,140.2 -67,137.3 -67,134.4 -67,131.5 -67,128.6 -67,125.7 -67,122.8 -67,119.9 -67,117 -67,117 -66.9,117 -66.8,117 -66.7,117 -66.6,117 -66.5,117 -66.4,117 -66.3,117 -66.2,117 -66.1,117 -66))"], "date_created": "Fri, 10 Nov 2017 00:00:00 GMT", "description": "Conductivity, Temperature, Depth (CTD) profiles from NBP1402, final, calibrated version. Data are reported as an ascii table suitable for import to Ocean Data View.", "east": 146.0, "geometry": ["POINT(131.5 -66.5)"], "keywords": "Antarctica; CTD Data; NBP1402; Oceans; Physical Oceanography; Sabrina Coast; Sample/collection Description; Sample/Collection Description; Southern Ocean", "locations": "Antarctica; Sabrina Coast; Southern Ocean", "north": -66.0, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Huber, Bruce", "project_titles": "Collaborative Research: Totten Glacier System and the Marine Record of Cryosphere - Ocean Dynamics", "projects": [{"proj_uid": "p0000008", "repository": "USAP-DC", "title": "Collaborative Research: Totten Glacier System and the Marine Record of Cryosphere - Ocean Dynamics"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -67.0, "title": "NBP1402 Final CTD data", "uid": "601067", "west": 117.0}, {"awards": "1341500 Ryberg, Patricia", "bounds_geometry": null, "date_created": "Tue, 07 Nov 2017 00:00:00 GMT", "description": "Images of Late Permian glossopterid reproductive structures from Allan Hills in the Beardmore Glacier Region of Antarctica.", "east": null, "geometry": null, "keywords": "Antarctica; Biota; Fossil; Sample/collection Description; Sample/Collection Description; Transantarctic Mountains", "locations": "Antarctica; Transantarctic Mountains", "north": null, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Ryberg, Patricia", "project_titles": "RUI: Antarctic Paleobotany: Permian Floral Characteristics in a Sedimentary Setting", "projects": [{"proj_uid": "p0010134", "repository": "USAP-DC", "title": "RUI: Antarctic Paleobotany: Permian Floral Characteristics in a Sedimentary Setting"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Images of Fossil Plants of Antarctica", "uid": "601066", "west": null}, {"awards": "1043471 Kaplan, Michael", "bounds_geometry": ["POLYGON((-112.5 -79.468,-112.4586 -79.468,-112.4172 -79.468,-112.3758 -79.468,-112.3344 -79.468,-112.293 -79.468,-112.2516 -79.468,-112.2102 -79.468,-112.1688 -79.468,-112.1274 -79.468,-112.086 -79.468,-112.086 -79.4712,-112.086 -79.4744,-112.086 -79.4776,-112.086 -79.4808,-112.086 -79.484,-112.086 -79.4872,-112.086 -79.4904,-112.086 -79.4936,-112.086 -79.4968,-112.086 -79.5,-112.1274 -79.5,-112.1688 -79.5,-112.2102 -79.5,-112.2516 -79.5,-112.293 -79.5,-112.3344 -79.5,-112.3758 -79.5,-112.4172 -79.5,-112.4586 -79.5,-112.5 -79.5,-112.5 -79.4968,-112.5 -79.4936,-112.5 -79.4904,-112.5 -79.4872,-112.5 -79.484,-112.5 -79.4808,-112.5 -79.4776,-112.5 -79.4744,-112.5 -79.4712,-112.5 -79.468))"], "date_created": "Fri, 27 Oct 2017 00:00:00 GMT", "description": "Listed are samples of WAIS Divide and Byrd (deep) ice that were analyzed for radiogenic isotopes at LDEO.", "east": -112.086, "geometry": ["POINT(-112.293 -79.484)"], "keywords": "Antarctica; Dust; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Isotope; Sample/collection Description; Sample/Collection Description; WAIS Divide; WAIS Divide Ice Core", "locations": "Antarctica; WAIS Divide", "north": -79.468, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Kaplan, Michael", "project_titles": "A Study of Atmospheric Dust in the WAIS Divide Ice Core Based on Sr-Nd-Pb-He Isotopes", "projects": [{"proj_uid": "p0000081", "repository": "USAP-DC", "title": "A Study of Atmospheric Dust in the WAIS Divide Ice Core Based on Sr-Nd-Pb-He Isotopes"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.5, "title": "List of samples of WAIS Divide and Byrd (deep) ice that were analyzed for radiogenic isotopes at LDEO", "uid": "601065", "west": -112.5}, {"awards": "1246378 Shevenell, Amelia", "bounds_geometry": ["POLYGON((-65.32 -64.15,-65.309 -64.15,-65.298 -64.15,-65.287 -64.15,-65.276 -64.15,-65.265 -64.15,-65.254 -64.15,-65.243 -64.15,-65.232 -64.15,-65.221 -64.15,-65.21 -64.15,-65.21 -64.186,-65.21 -64.222,-65.21 -64.258,-65.21 -64.294,-65.21 -64.33,-65.21 -64.366,-65.21 -64.402,-65.21 -64.438,-65.21 -64.474,-65.21 -64.51,-65.221 -64.51,-65.232 -64.51,-65.243 -64.51,-65.254 -64.51,-65.265 -64.51,-65.276 -64.51,-65.287 -64.51,-65.298 -64.51,-65.309 -64.51,-65.32 -64.51,-65.32 -64.474,-65.32 -64.438,-65.32 -64.402,-65.32 -64.366,-65.32 -64.33,-65.32 -64.294,-65.32 -64.258,-65.32 -64.222,-65.32 -64.186,-65.32 -64.15))"], "date_created": "Wed, 25 Oct 2017 00:00:00 GMT", "description": "These are unpublished stable isotope data from a series of sediment cores collected during LMG12-11 and LMG13-11 down the axis of Anvers Trough. These records span the LMG to recent.", "east": -65.21, "geometry": ["POINT(-65.265 -64.33)"], "keywords": "Antarctica; Antarctic Peninsula; Anvers Trough; Chemistry:sediment; Chemistry:Sediment; Foraminifera; Geochemistry; Isotope; LMG1211; LMG1311; Marine Sediments; Oceans; Paleoclimate; Sample/collection Description; Sample/Collection Description; Southern Ocean", "locations": "Anvers Trough; Southern Ocean; Antarctic Peninsula; Antarctica", "north": -64.15, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Shevenell, Amelia", "project_titles": "Late Quaternary Evolution of the Lambert Glacier/Amery Ice Shelf System, Prydz Bay, Antarctica", "projects": [{"proj_uid": "p0000381", "repository": "USAP-DC", "title": "Late Quaternary Evolution of the Lambert Glacier/Amery Ice Shelf System, Prydz Bay, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.51, "title": "Anvers Trough Foraminifer Stable Isotope data", "uid": "601064", "west": -65.32}, {"awards": "1246170 Hall, Brenda", "bounds_geometry": ["POLYGON((155.4 -79.8,155.54 -79.8,155.68 -79.8,155.82 -79.8,155.96 -79.8,156.1 -79.8,156.24 -79.8,156.38 -79.8,156.52 -79.8,156.66 -79.8,156.8 -79.8,156.8 -79.82,156.8 -79.84,156.8 -79.86,156.8 -79.88,156.8 -79.9,156.8 -79.92,156.8 -79.94,156.8 -79.96,156.8 -79.98,156.8 -80,156.66 -80,156.52 -80,156.38 -80,156.24 -80,156.1 -80,155.96 -80,155.82 -80,155.68 -80,155.54 -80,155.4 -80,155.4 -79.98,155.4 -79.96,155.4 -79.94,155.4 -79.92,155.4 -79.9,155.4 -79.88,155.4 -79.86,155.4 -79.84,155.4 -79.82,155.4 -79.8))"], "date_created": "Mon, 23 Oct 2017 00:00:00 GMT", "description": "Hatherton Glacier Radiocarbon Data", "east": 156.8, "geometry": ["POINT(156.1 -79.9)"], "keywords": "Antarctica; Geochronology; Hatherton Glacier; Radiocarbon; Sample/collection Description; Sample/Collection Description; Transantarctic Mountains", "locations": "Transantarctic Mountains; Hatherton Glacier; Antarctica", "north": -79.8, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Hall, Brenda", "project_titles": "Collaborative Research: Assessing the Antarctic Contribution to Sea-level Changes during the Last Deglaciation: Constraints from Darwin Glacier", "projects": [{"proj_uid": "p0000304", "repository": "USAP-DC", "title": "Collaborative Research: Assessing the Antarctic Contribution to Sea-level Changes during the Last Deglaciation: Constraints from Darwin Glacier"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.0, "title": "Hatherton Glacier Radiocarbon Data", "uid": "601063", "west": 155.4}, {"awards": "1041022 McClintock, James", "bounds_geometry": ["POLYGON((-64.5 -64.5,-64.45 -64.5,-64.4 -64.5,-64.35 -64.5,-64.3 -64.5,-64.25 -64.5,-64.2 -64.5,-64.15 -64.5,-64.1 -64.5,-64.05 -64.5,-64 -64.5,-64 -64.54,-64 -64.58,-64 -64.62,-64 -64.66,-64 -64.7,-64 -64.74,-64 -64.78,-64 -64.82,-64 -64.86,-64 -64.9,-64.05 -64.9,-64.1 -64.9,-64.15 -64.9,-64.2 -64.9,-64.25 -64.9,-64.3 -64.9,-64.35 -64.9,-64.4 -64.9,-64.45 -64.9,-64.5 -64.9,-64.5 -64.86,-64.5 -64.82,-64.5 -64.78,-64.5 -64.74,-64.5 -64.7,-64.5 -64.66,-64.5 -64.62,-64.5 -64.58,-64.5 -64.54,-64.5 -64.5))"], "date_created": "Fri, 20 Oct 2017 00:00:00 GMT", "description": "", "east": -64.0, "geometry": ["POINT(-64.25 -64.7)"], "keywords": "Antarctica; Antarctic Peninsula; Biota; Chemistry:fluid; Chemistry:Fluid; Sample/collection Description; Sample/Collection Description; Southern Ocean", "locations": "Antarctic Peninsula; Antarctica; Southern Ocean", "north": -64.5, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Amsler, Charles; Schram, Julie", "project_titles": "The effects of ocean acidification and rising sea surface temperatures on shallow-water benthic organisms in Antarctica", "projects": [{"proj_uid": "p0000426", "repository": "USAP-DC", "title": "The effects of ocean acidification and rising sea surface temperatures on shallow-water benthic organisms in Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.9, "title": "Data from Schram et al. 2017 MEPS", "uid": "601062", "west": -64.5}, {"awards": "1341712 Hallet, Bernard; 1341754 Malin, Michael", "bounds_geometry": ["POLYGON((160.9 -76.7,161.08 -76.7,161.26 -76.7,161.44 -76.7,161.62 -76.7,161.8 -76.7,161.98 -76.7,162.16 -76.7,162.34 -76.7,162.52 -76.7,162.7 -76.7,162.7 -76.79,162.7 -76.88,162.7 -76.97,162.7 -77.06,162.7 -77.15,162.7 -77.24,162.7 -77.33,162.7 -77.42,162.7 -77.51,162.7 -77.6,162.52 -77.6,162.34 -77.6,162.16 -77.6,161.98 -77.6,161.8 -77.6,161.62 -77.6,161.44 -77.6,161.26 -77.6,161.08 -77.6,160.9 -77.6,160.9 -77.51,160.9 -77.42,160.9 -77.33,160.9 -77.24,160.9 -77.15,160.9 -77.06,160.9 -76.97,160.9 -76.88,160.9 -76.79,160.9 -76.7))"], "date_created": "Wed, 11 Oct 2017 00:00:00 GMT", "description": "Abrasion mass loss for rock targets installed in the Dry Valleys starting in 1982.", "east": 162.7, "geometry": ["POINT(161.8 -77.15)"], "keywords": "Antarctica; Dry Valleys; Geology/Geophysics - Other; Rocks", "locations": "Dry Valleys; Antarctica", "north": -76.7, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Sletten, Ronald S.; Hallet, Bernard; Malin, Michael", "project_titles": "Collaborative Proposal: Decades-long Experiment on Wind-Driven Rock Abrasion in the Ice-Free Valleys, Antarctica", "projects": [{"proj_uid": "p0000074", "repository": "USAP-DC", "title": "Collaborative Proposal: Decades-long Experiment on Wind-Driven Rock Abrasion in the Ice-Free Valleys, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.6, "title": "Long-term rock abrasion study in the Dry Valleys", "uid": "601060", "west": 160.9}, {"awards": "1246317 Mittal, Rajat", "bounds_geometry": null, "date_created": "Wed, 27 Sep 2017 00:00:00 GMT", "description": "Spongiobranchaea australis is a gymnosome pteropod that is abundant in the Southern Ocean. Videos of specimens of S. Australis collected near Palmer Station in April 2014, were used to develop computational fluid dynamics models and simulations of swimming hydrodynamics conducted. The deposited movie shows the computed vortex structures for a swimming S. Australis.", "east": null, "geometry": null, "keywords": "Biota; Fish; Southern Ocean", "locations": "Southern Ocean", "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Mittal, Rajat", "project_titles": "Collaborative Research: Pteropod Swimming Behavior as a Bio Assay for Ocean Acidification", "projects": [{"proj_uid": "p0000139", "repository": "USAP-DC", "title": "Collaborative Research: Pteropod Swimming Behavior as a Bio Assay for Ocean Acidification"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Hydrodynamics of Spongiobranchaea australis", "uid": "601058", "west": null}, {"awards": "1542778 Alley, Richard", "bounds_geometry": ["POINT(-180 -90)"], "date_created": "Wed, 20 Sep 2017 00:00:00 GMT", "description": "Thin sections of the South Pole Ice Core, SPC14, were prepared from samples taken every ~20 meters starting at 100 meters depth. Samples from 140 meters to 1739 meters depth were analyzed to determine the c-axis fabric of the grains. The ice is generally fine-grained, with the samples at 100 and 120 meters depth too fine grained for successful analysis, but sufficient grain growth having occurred for analysis of all deeper samples.\r\r\nThe c-axis fabric was measured on the automated c-axis fabric analyzer located at Penn State University, designed and built by Larry Wilen. Raw data is in the form of multiple images of the ice thin section taken at defined angles under cross polarized light. The images are analyzed to determine position of the extinction minimum of each grain within the thin section, this being the orientation of the c-axis of that grain. During processing, the area of each analyzed grain is also measured.\r\r\nShallow samples show a fairly random distribution, although with a slight tendency for clustering of c-axes toward the vertical. With increasing depth, the c-axes rotate toward a vertical plane with a slight additional tendency of clustering toward the vertical within that plane. The core was not oriented during collection, so it is not possible to unambiguously tell how the vertical plane is related to ice flow, but physical understanding indicates that it is transverse to flow.", "east": -180.0, "geometry": ["POINT(-180 -90)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; South Pole; SPICEcore", "locations": "South Pole; Antarctica", "north": -90.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Voigt, Donald E.", "project_titles": "Climate History and Flow Processes from Physical Analyses of the SPICECORE South Pole Ice Core", "projects": [{"proj_uid": "p0000141", "repository": "USAP-DC", "title": "Climate History and Flow Processes from Physical Analyses of the SPICECORE South Pole Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -90.0, "title": "c-Axis Fabric of the South Pole Ice Core, SPC14", "uid": "601057", "west": -180.0}, {"awards": "1142002 Kaplan, Michael", "bounds_geometry": ["POLYGON((-58 -63.7,-57.95 -63.7,-57.9 -63.7,-57.85 -63.7,-57.8 -63.7,-57.75 -63.7,-57.7 -63.7,-57.65 -63.7,-57.6 -63.7,-57.55 -63.7,-57.5 -63.7,-57.5 -63.73,-57.5 -63.76,-57.5 -63.79,-57.5 -63.82,-57.5 -63.85,-57.5 -63.88,-57.5 -63.91,-57.5 -63.94,-57.5 -63.97,-57.5 -64,-57.55 -64,-57.6 -64,-57.65 -64,-57.7 -64,-57.75 -64,-57.8 -64,-57.85 -64,-57.9 -64,-57.95 -64,-58 -64,-58 -63.97,-58 -63.94,-58 -63.91,-58 -63.88,-58 -63.85,-58 -63.82,-58 -63.79,-58 -63.76,-58 -63.73,-58 -63.7))"], "date_created": "Sat, 16 Sep 2017 00:00:00 GMT", "description": "These are data sets obtained with the supported award. The ages concern the histories of glaciers, ice sheets, and general cryospheric and climatic activities of the northern Antarctic Peninsula and surrounding area.They cover periods from prior to the last global glacial maximum (stage 3 and older?) as well as since deglaciation.", "east": -57.5, "geometry": ["POINT(-57.75 -63.85)"], "keywords": "Antarctica; Antarctic Peninsula; Glaciers/ice Sheet; Glaciers/Ice Sheet; GPS; James Ross Island; Sample/collection Description; Sample/Collection Description; Solid Earth", "locations": "James Ross Island; Antarctic Peninsula; Antarctica", "north": -63.7, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Kaplan, Michael", "project_titles": "Terrestrial Geological Context for Glacier Change in the Northeast Antarctica Peninsula", "projects": [{"proj_uid": "p0000337", "repository": "USAP-DC", "title": "Terrestrial Geological Context for Glacier Change in the Northeast Antarctica Peninsula"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.0, "title": "10Be and 14C data from northern Antarctic Peninsula", "uid": "601051", "west": -58.0}, {"awards": "1043522 Brook, Edward J.", "bounds_geometry": ["POLYGON((-112.085 -79.46,-112.0765 -79.46,-112.068 -79.46,-112.0595 -79.46,-112.051 -79.46,-112.0425 -79.46,-112.034 -79.46,-112.0255 -79.46,-112.017 -79.46,-112.0085 -79.46,-112 -79.46,-112 -79.4607,-112 -79.4614,-112 -79.4621,-112 -79.4628,-112 -79.4635,-112 -79.4642,-112 -79.4649,-112 -79.4656,-112 -79.4663,-112 -79.467,-112.0085 -79.467,-112.017 -79.467,-112.0255 -79.467,-112.034 -79.467,-112.0425 -79.467,-112.051 -79.467,-112.0595 -79.467,-112.068 -79.467,-112.0765 -79.467,-112.085 -79.467,-112.085 -79.4663,-112.085 -79.4656,-112.085 -79.4649,-112.085 -79.4642,-112.085 -79.4635,-112.085 -79.4628,-112.085 -79.4621,-112.085 -79.4614,-112.085 -79.4607,-112.085 -79.46))"], "date_created": "Fri, 15 Sep 2017 00:00:00 GMT", "description": "Data set contains stable isotope data set for methane in the WAIS Divide replicate core for the interval of 3009 to 2071 meters. These measurements were made by James Lee at the University of Bern as part of his PhD thesis and are the subject of a paper in preparation. ", "east": -112.0, "geometry": ["POINT(-112.0425 -79.4635)"], "keywords": "Antarctica; Chemistry:fluid; Chemistry:Fluid; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Paleoclimate; WAIS Divide; WAIS Divide Ice Core", "locations": "WAIS Divide; Antarctica", "north": -79.46, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Glaciology", "persons": "Brook, Edward J.", "project_titles": "Collaborative Research: Replicate Coring at WAIS Divide to Obtain Additional Samples at Events of High Scientific Interest", "projects": [{"proj_uid": "p0000751", "repository": "USAP-DC", "title": "Collaborative Research: Replicate Coring at WAIS Divide to Obtain Additional Samples at Events of High Scientific Interest"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.467, "title": "WAIS Divide Replicate Core Methane Isotopic Data Set", "uid": "601059", "west": -112.085}, {"awards": "0732946 Steffen, Konrad", "bounds_geometry": ["POLYGON((-66 -66,-65.4 -66,-64.8 -66,-64.2 -66,-63.6 -66,-63 -66,-62.4 -66,-61.8 -66,-61.2 -66,-60.6 -66,-60 -66,-60 -66.4,-60 -66.8,-60 -67.2,-60 -67.6,-60 -68,-60 -68.4,-60 -68.8,-60 -69.2,-60 -69.6,-60 -70,-60.6 -70,-61.2 -70,-61.8 -70,-62.4 -70,-63 -70,-63.6 -70,-64.2 -70,-64.8 -70,-65.4 -70,-66 -70,-66 -69.6,-66 -69.2,-66 -68.8,-66 -68.4,-66 -68,-66 -67.6,-66 -67.2,-66 -66.8,-66 -66.4,-66 -66))"], "date_created": "Wed, 13 Sep 2017 00:00:00 GMT", "description": "We produce a reconstruction of surface mass balance (SMB) (in mm w.e. per year) by adjusting the 1979-2014 RACMO2 SMB to the spatial pattern of ground-penetrating radar observations and to observations of SMB from sonic height rangers.", "east": -60.0, "geometry": ["POINT(-63 -68)"], "keywords": "Antarctica; Antarctic Peninsula; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Larsen C Ice Shelf; Radar", "locations": "Antarctica; Larsen C Ice Shelf; Antarctic Peninsula", "north": -66.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "McGrath, Daniel; Steffen, Konrad; Kuipers Munneke, Peter", "project_titles": "IPY: Stability of Larsen C Ice Shelf in a Warming Climate", "projects": [{"proj_uid": "p0000087", "repository": "USAP-DC", "title": "IPY: Stability of Larsen C Ice Shelf in a Warming Climate"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -70.0, "title": "Mean surface mass balance over Larsen C ice shelf, Antarctica (1979-2014), assimilated to in situ GPR and snow height data", "uid": "601056", "west": -66.0}, {"awards": "1142007 Kurbatov, Andrei; 1142069 Dunbar, Nelia", "bounds_geometry": ["POLYGON((0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,216 -60,252 -60,288 -60,324 -60,360 -60,360 -63,360 -66,360 -69,360 -72,360 -75,360 -78,360 -81,360 -84,360 -87,360 -90,324 -90,288 -90,252 -90,216 -90,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,0 -87,0 -84,0 -81,0 -78,0 -75,0 -72,0 -69,0 -66,0 -63,0 -60))"], "date_created": "Wed, 13 Sep 2017 00:00:00 GMT", "description": "This collaborative interdisciplinary research project aims to consolidate, into a single user-friendly database, information about volcanic products detected in Antarctica. By consolidating information about volcanic sources, and physical and geochemical characteristics of volcanic products, this systematic data collection approach will improve the ability of researchers to identify volcanic ash, or tephra, from specific volcanic eruptions that may be spread over large areas in a geologically instantaneous amount of time. AntT database is designed to assist in the identification and cross-correlation of time intervals in various paleoclimate archives that contain volcanic layers from often unknown sources.", "east": 360.0, "geometry": ["POINT(180 -75)"], "keywords": "Antarctica; Geochemistry; Geochronology; Glaciology; Intracontinental Magmatism; IntraContinental Magmatism; Sample/collection Description; Sample/Collection Description; Tephra", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Kurbatov, Andrei V.; Dunbar, Nelia", "project_titles": "Collaborative Research: Developing an Antarctic Tephra Database for Interdisciplinary Paleoclimate Research (AntT)", "projects": [{"proj_uid": "p0000328", "repository": "USAP-DC", "title": "Collaborative Research: Developing an Antarctic Tephra Database for Interdisciplinary Paleoclimate Research (AntT)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Antarctic Tephra Data Base AntT static web site ", "uid": "601052", "west": 0.0}, {"awards": "1043518 Brook, Edward J.", "bounds_geometry": ["POLYGON((-113 -79,-112.8 -79,-112.6 -79,-112.4 -79,-112.2 -79,-112 -79,-111.8 -79,-111.6 -79,-111.4 -79,-111.2 -79,-111 -79,-111 -79.1,-111 -79.2,-111 -79.3,-111 -79.4,-111 -79.5,-111 -79.6,-111 -79.7,-111 -79.8,-111 -79.9,-111 -80,-111.2 -80,-111.4 -80,-111.6 -80,-111.8 -80,-112 -80,-112.2 -80,-112.4 -80,-112.6 -80,-112.8 -80,-113 -80,-113 -79.9,-113 -79.8,-113 -79.7,-113 -79.6,-113 -79.5,-113 -79.4,-113 -79.3,-113 -79.2,-113 -79.1,-113 -79))"], "date_created": "Mon, 11 Sep 2017 00:00:00 GMT", "description": "Below we present the early Holocene discrete CH4 dataset from Siple Dome (SDMA), Antarctica, measured at Oregon State University (OSU) and Seoul National University (SNU) by discrete wet extraction technique. Analytical method is described in Grachev et al. (2009) and Mitchell et al. (2011) for OSU data, and Yang et al. (2017) for SNU data. SDMA CH4 composite record was constructed by combining OSU data for 7.6 - 9.0 ka and SNU data for 9.0 - 11.6 ka to maximize temporal resolution. SDMA gas chronology was synchronized to Greenland Ice Core Chronology 2005 (GICC05) scale. For detailed description on synchronization and age uncertainty please refer to Yang et al. (2017).", "east": -111.0, "geometry": ["POINT(-112 -79.5)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Methane; Paleoclimate; Siple Dome; Siple Dome Ice Core", "locations": "Siple Dome; Antarctica", "north": -79.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Yang, Ji-Woong; Ahn, Jinho", "project_titles": "Collaborative Research: Completing an ultra-high resolution methane record from the WAIS Divide ice core", "projects": [{"proj_uid": "p0000185", "repository": "USAP-DC", "title": "Collaborative Research: Completing an ultra-high resolution methane record from the WAIS Divide ice core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core; Siple Dome Ice Core", "south": -80.0, "title": "Early Holocene methane records from Siple Dome, Antarctica", "uid": "601055", "west": -113.0}, {"awards": "1245737 Cassano, John", "bounds_geometry": ["POLYGON((161.714 -77.522,162.6077 -77.522,163.5014 -77.522,164.3951 -77.522,165.2888 -77.522,166.1825 -77.522,167.0762 -77.522,167.9699 -77.522,168.8636 -77.522,169.7573 -77.522,170.651 -77.522,170.651 -77.6702,170.651 -77.8184,170.651 -77.9666,170.651 -78.1148,170.651 -78.263,170.651 -78.4112,170.651 -78.5594,170.651 -78.7076,170.651 -78.8558,170.651 -79.004,169.7573 -79.004,168.8636 -79.004,167.9699 -79.004,167.0762 -79.004,166.1825 -79.004,165.2888 -79.004,164.3951 -79.004,163.5014 -79.004,162.6077 -79.004,161.714 -79.004,161.714 -78.8558,161.714 -78.7076,161.714 -78.5594,161.714 -78.4112,161.714 -78.263,161.714 -78.1148,161.714 -77.9666,161.714 -77.8184,161.714 -77.6702,161.714 -77.522))"], "date_created": "Thu, 07 Sep 2017 00:00:00 GMT", "description": "Atmospheric boundary layer temperature, humidity, pressure, and wind profile data collected with the Small Unmanned Meteorological Observer (SUMO) unmanned aerial system (UAS)", "east": 170.651, "geometry": ["POINT(166.1825 -78.263)"], "keywords": "Antarctica; Atmosphere; Meteorology; Navigation; UAS", "locations": "Antarctica", "north": -77.522, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Cassano, John", "project_titles": "Collaborative Research: Antarctic Automatic Weather Station Program 2013-2017", "projects": [{"proj_uid": "p0000363", "repository": "USAP-DC", "title": "Collaborative Research: Antarctic Automatic Weather Station Program 2013-2017"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.004, "title": "SUMO unmanned aerial system (UAS) atmospheric data", "uid": "601054", "west": 161.714}, {"awards": "1142085 Alley, Richard", "bounds_geometry": ["POLYGON((0 -75,5.489 -75,10.978 -75,16.467 -75,21.956 -75,27.445 -75,32.934 -75,38.423 -75,43.912 -75,49.401 -75,54.89 -75,54.89 -75.763,54.89 -76.526,54.89 -77.289,54.89 -78.052,54.89 -78.815,54.89 -79.578,54.89 -80.341,54.89 -81.104,54.89 -81.867,54.89 -82.63,49.401 -82.63,43.912 -82.63,38.423 -82.63,32.934 -82.63,27.445 -82.63,21.956 -82.63,16.467 -82.63,10.978 -82.63,5.489 -82.63,0 -82.63,0 -81.867,0 -81.104,0 -80.341,0 -79.578,0 -78.815,0 -78.052,0 -77.289,0 -76.526,0 -75.763,0 -75))"], "date_created": "Tue, 05 Sep 2017 00:00:00 GMT", "description": "", "east": 54.89, "geometry": ["POINT(27.445 -78.815)"], "keywords": "Antarctica; Borehole Logging; Dronning Maud Land; Firn; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Physical Properties; Snow; Temperature", "locations": "Dronning Maud Land; Antarctica", "north": -75.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Muto, Atsu", "project_titles": "Revealing Late Holocence Climate Variability in Antarctica from Borehole Paleothermometry", "projects": [{"proj_uid": "p0000440", "repository": "USAP-DC", "title": "Revealing Late Holocence Climate Variability in Antarctica from Borehole Paleothermometry"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -82.63, "title": "Firn-temperature time series in Dronning Maud Land, East Antarctica", "uid": "601050", "west": 0.0}, {"awards": "0424589 Gogineni, S. Prasad", "bounds_geometry": ["POLYGON((143 -74.2,155.9 -74.2,168.8 -74.2,181.7 -74.2,194.6 -74.2,207.5 -74.2,220.4 -74.2,233.3 -74.2,246.2 -74.2,259.1 -74.2,272 -74.2,272 -75.5,272 -76.8,272 -78.1,272 -79.4,272 -80.7,272 -82,272 -83.3,272 -84.6,272 -85.9,272 -87.2,259.1 -87.2,246.2 -87.2,233.3 -87.2,220.4 -87.2,207.5 -87.2,194.6 -87.2,181.7 -87.2,168.8 -87.2,155.9 -87.2,143 -87.2,143 -85.9,143 -84.6,143 -83.3,143 -82,143 -80.7,143 -79.4,143 -78.1,143 -76.8,143 -75.5,143 -74.2))"], "date_created": "Mon, 28 Aug 2017 00:00:00 GMT", "description": "The MCoRDS data set contains L1B Geolocated Radar Echo Strength Profile Images and L2 Ice Thickness, Ice Surface, and Ice Bottom elevations over Antarctica taken with the CReSIS Radar Depth Sounders (RDS). The L1B data set includes measurements for echograms, time, latitude, longitude, elevation, as well as flight path charts and echogram images.The L2 data set includes measurements for time, latitude, longitude, elevation, surface, bottom, and thickness.", "east": 272.0, "geometry": ["POINT(-152.5 -80.7)"], "keywords": "Airborne Radar; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; MCoRDS; Navigation; Radar", "locations": "Antarctica", "north": -74.2, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Paden, John; Leuschen, Carl; Rodriguez, Fernando; Li, Jilu; Allen, Chris; Gogineni, Prasad", "project_titles": "Center for Remote Sensing of Ice Sheets (CReSIS)", "projects": [{"proj_uid": "p0000102", "repository": "USAP-DC", "title": "Center for Remote Sensing of Ice Sheets (CReSIS)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -87.2, "title": "Radar Depth Sounder Echograms and Ice Thickness", "uid": "601047", "west": 143.0}, {"awards": "0424589 Gogineni, S. Prasad", "bounds_geometry": ["POLYGON((163.9 -76.5,164.09 -76.5,164.28 -76.5,164.47 -76.5,164.66 -76.5,164.85 -76.5,165.04 -76.5,165.23 -76.5,165.42 -76.5,165.61 -76.5,165.8 -76.5,165.8 -76.57,165.8 -76.64,165.8 -76.71,165.8 -76.78,165.8 -76.85,165.8 -76.92,165.8 -76.99,165.8 -77.06,165.8 -77.13,165.8 -77.2,165.61 -77.2,165.42 -77.2,165.23 -77.2,165.04 -77.2,164.85 -77.2,164.66 -77.2,164.47 -77.2,164.28 -77.2,164.09 -77.2,163.9 -77.2,163.9 -77.13,163.9 -77.06,163.9 -76.99,163.9 -76.92,163.9 -76.85,163.9 -76.78,163.9 -76.71,163.9 -76.64,163.9 -76.57,163.9 -76.5))"], "date_created": "Mon, 28 Aug 2017 00:00:00 GMT", "description": "The Snow Radar data set contains L1B Geolocated Radar Echo Strength Profiles over Antarctica taken with the CReSIS snow radar.\r\r\nThe L1B data set includes echograms with measurements for time, latitude, longitude, elevation, as well as flight path charts and echogram images.", "east": 165.8, "geometry": ["POINT(164.85 -76.85)"], "keywords": "Airborne Radar; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Navigation; Radar; Snow", "locations": "Antarctica", "north": -76.5, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Paden, John; Leuschen, Carl; Rodriguez, Fernando; Li, Jilu; Allen, Chris; Gogineni, Prasad", "project_titles": "Center for Remote Sensing of Ice Sheets (CReSIS)", "projects": [{"proj_uid": "p0000102", "repository": "USAP-DC", "title": "Center for Remote Sensing of Ice Sheets (CReSIS)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.2, "title": "Snow Radar Echograms", "uid": "601049", "west": 163.9}, {"awards": "0424589 Gogineni, S. Prasad", "bounds_geometry": ["POLYGON((143 -76.5,145.61 -76.5,148.22 -76.5,150.83 -76.5,153.44 -76.5,156.05 -76.5,158.66 -76.5,161.27 -76.5,163.88 -76.5,166.49 -76.5,169.1 -76.5,169.1 -77.07,169.1 -77.64,169.1 -78.21,169.1 -78.78,169.1 -79.35,169.1 -79.92,169.1 -80.49,169.1 -81.06,169.1 -81.63,169.1 -82.2,166.49 -82.2,163.88 -82.2,161.27 -82.2,158.66 -82.2,156.05 -82.2,153.44 -82.2,150.83 -82.2,148.22 -82.2,145.61 -82.2,143 -82.2,143 -81.63,143 -81.06,143 -80.49,143 -79.92,143 -79.35,143 -78.78,143 -78.21,143 -77.64,143 -77.07,143 -76.5))"], "date_created": "Mon, 28 Aug 2017 00:00:00 GMT", "description": "The Ku-band Radar data set contains L1B Geolocated Radar Echo Strength Profiles over Antarctica taken with the CReSIS Ku-band Radar. The L1B data set includes echograms with measurements for time, latitude, longitude, elevation, as well as flight path charts and echogram images.", "east": 169.1, "geometry": ["POINT(156.05 -79.35)"], "keywords": "Airborne Radar; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ku-Band; Navigation; Radar", "locations": "Antarctica", "north": -76.5, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Paden, John; Leuschen, Carl; Rodriguez, Fernando; Li, Jilu; Allen, Chris; Gogineni, Prasad", "project_titles": "Center for Remote Sensing of Ice Sheets (CReSIS)", "projects": [{"proj_uid": "p0000102", "repository": "USAP-DC", "title": "Center for Remote Sensing of Ice Sheets (CReSIS)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -82.2, "title": "Ku-band Radar Echograms", "uid": "601048", "west": 143.0}, {"awards": "1430550 Domack, Eugene", "bounds_geometry": ["POLYGON((120 -66,120.1 -66,120.2 -66,120.3 -66,120.4 -66,120.5 -66,120.6 -66,120.7 -66,120.8 -66,120.9 -66,121 -66,121 -66.4,121 -66.8,121 -67.2,121 -67.6,121 -68,121 -68.4,121 -68.8,121 -69.2,121 -69.6,121 -70,120.9 -70,120.8 -70,120.7 -70,120.6 -70,120.5 -70,120.4 -70,120.3 -70,120.2 -70,120.1 -70,120 -70,120 -69.6,120 -69.2,120 -68.8,120 -68.4,120 -68,120 -67.6,120 -67.2,120 -66.8,120 -66.4,120 -66))"], "date_created": "Fri, 18 Aug 2017 00:00:00 GMT", "description": "Bulk sediment carbon and nitrogen data data for Paleocene sediments collected on Totten continental shelf, East Antarctica. ", "east": 121.0, "geometry": ["POINT(120.5 -68)"], "keywords": "Antarctica; Carbon; Chemistry:sediment; Chemistry:Sediment; Geochemistry; Marine Sediments; NBP1402; Nitrogen; Oceans; Sabrina Coast; Sediment Core; Southern Ocean; Totten Glacier", "locations": "Sabrina Coast; Antarctica; Southern Ocean; Totten Glacier", "north": -66.0, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Smith, Catherine; Shevenell, Amelia; Domack, Eugene Walter", "project_titles": "Collaborative Research: Totten Glacier System and the Marine Record of Cryosphere - Ocean Dynamics", "projects": [{"proj_uid": "p0000008", "repository": "USAP-DC", "title": "Collaborative Research: Totten Glacier System and the Marine Record of Cryosphere - Ocean Dynamics"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -70.0, "title": "NBP14-02 JPC-55 Bulk Sediment Carbon and Nitrogen data", "uid": "601044", "west": 120.0}, {"awards": "1430550 Domack, Eugene", "bounds_geometry": ["POLYGON((120 -66,120.1 -66,120.2 -66,120.3 -66,120.4 -66,120.5 -66,120.6 -66,120.7 -66,120.8 -66,120.9 -66,121 -66,121 -66.4,121 -66.8,121 -67.2,121 -67.6,121 -68,121 -68.4,121 -68.8,121 -69.2,121 -69.6,121 -70,120.9 -70,120.8 -70,120.7 -70,120.6 -70,120.5 -70,120.4 -70,120.3 -70,120.2 -70,120.1 -70,120 -70,120 -69.6,120 -69.2,120 -68.8,120 -68.4,120 -68,120 -67.6,120 -67.2,120 -66.8,120 -66.4,120 -66))"], "date_created": "Fri, 18 Aug 2017 00:00:00 GMT", "description": "Pollen assemblage data for Paleocene to early to middle Eocene sediments collected on Totten continental shelf, East Antarctica. ", "east": 121.0, "geometry": ["POINT(120.5 -68)"], "keywords": "Antarctica; Biota; Marine Sediments; NBP1402; Oceans; Paleoclimate; Pollen; Sabrina Coast; Sediment Core; Southern Ocean; Totten Glacier", "locations": "Antarctica; Southern Ocean; Totten Glacier; Sabrina Coast", "north": -66.0, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Shevenell, Amelia; Smith, Catherine; Domack, Eugene Walter", "project_titles": "Collaborative Research: Totten Glacier System and the Marine Record of Cryosphere - Ocean Dynamics", "projects": [{"proj_uid": "p0000008", "repository": "USAP-DC", "title": "Collaborative Research: Totten Glacier System and the Marine Record of Cryosphere - Ocean Dynamics"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -70.0, "title": "NBP14-02 JPC-54 and JPC-55 Pollen Assemblage data", "uid": "601046", "west": 120.0}, {"awards": "1143836 Leventer, Amy", "bounds_geometry": ["POLYGON((120 -66,120.1 -66,120.2 -66,120.3 -66,120.4 -66,120.5 -66,120.6 -66,120.7 -66,120.8 -66,120.9 -66,121 -66,121 -66.4,121 -66.8,121 -67.2,121 -67.6,121 -68,121 -68.4,121 -68.8,121 -69.2,121 -69.6,121 -70,120.9 -70,120.8 -70,120.7 -70,120.6 -70,120.5 -70,120.4 -70,120.3 -70,120.2 -70,120.1 -70,120 -70,120 -69.6,120 -69.2,120 -68.8,120 -68.4,120 -68,120 -67.6,120 -67.2,120 -66.8,120 -66.4,120 -66))"], "date_created": "Fri, 18 Aug 2017 00:00:00 GMT", "description": "Foraminifer assemblage data for Paleocene sediments collected on Totten continental shelf, East Antarctica.", "east": 121.0, "geometry": ["POINT(120.5 -68)"], "keywords": "Antarctica; Biota; Continental Margin; Foraminifera; NBP1402; Oceans; Paleoclimate; Sabrina Coast; Sample/collection Description; Sample/Collection Description; Southern Ocean; Totten Glacier", "locations": "Southern Ocean; Sabrina Coast; Totten Glacier; Antarctica", "north": -66.0, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Shevenell, Amelia; Leventer, Amy", "project_titles": "Collaborative Research: Totten Glacier System and the Marine Record of Cryosphere - Ocean Dynamics", "projects": [{"proj_uid": "p0000008", "repository": "USAP-DC", "title": "Collaborative Research: Totten Glacier System and the Marine Record of Cryosphere - Ocean Dynamics"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -70.0, "title": "NBP14-02 JPC-55 foraminifer assemblage data", "uid": "601042", "west": 120.0}, {"awards": "0538657 Severinghaus, Jeffrey", "bounds_geometry": ["POLYGON((-113 -79,-112.8 -79,-112.6 -79,-112.4 -79,-112.2 -79,-112 -79,-111.8 -79,-111.6 -79,-111.4 -79,-111.2 -79,-111 -79,-111 -79.1,-111 -79.2,-111 -79.3,-111 -79.4,-111 -79.5,-111 -79.6,-111 -79.7,-111 -79.8,-111 -79.9,-111 -80,-111.2 -80,-111.4 -80,-111.6 -80,-111.8 -80,-112 -80,-112.2 -80,-112.4 -80,-112.6 -80,-112.8 -80,-113 -80,-113 -79.9,-113 -79.8,-113 -79.7,-113 -79.6,-113 -79.5,-113 -79.4,-113 -79.3,-113 -79.2,-113 -79.1,-113 -79))"], "date_created": "Fri, 18 Aug 2017 00:00:00 GMT", "description": "This data set contains measurements of d18Oatm (d18O of O2), d15N, dAr/N2, and dO2/N2 in gas bubbles from the WAIS Divide ice core. The time resolution is variable throughout the record but is ~100 years on average (from 65 ka to present). All measurements were made in the Noble Gas Isotope Laboratory at Scripps Institution of Oceanography (La Jolla, CA). The data set includes all replicate measurements as well as replicate-mean values and a calculation of measurement precision (pooled standard deviation). The second sheet of this data set includes fitted d18Oatm curves for the past 50 ka from both the WAIS Divide and Siple Dome Antarctic ice cores, both on the WD2014 timescale (Buizert et al., 2015). The second sheet also includes calculations of the time derivative of d18Oatm and d e LAND in both ice cores individual as well as in a composite record. Details of the entire data set and all relevant methods are provided in Seltzer et al., 2017.", "east": -111.0, "geometry": ["POINT(-112 -79.5)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Gas; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Isotope; WAIS Divide Ice Core", "locations": "Antarctica", "north": -79.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Seltzer, Alan; Severinghaus, Jeffrey P.", "project_titles": "Nitrogen and Oxygen Gas Isotopes in the WAIS Divide Ice Core as Constraints on Chronology, Temperature, and Accumulation Rate", "projects": [{"proj_uid": "p0000036", "repository": "USAP-DC", "title": "Nitrogen and Oxygen Gas Isotopes in the WAIS Divide Ice Core as Constraints on Chronology, Temperature, and Accumulation Rate"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -80.0, "title": "WAIS Divide d18Oatm and Siple Dome/WAIS Divide composite and individual delta epsilon LAND", "uid": "601041", "west": -113.0}, {"awards": "1142122 Miller, Nathan", "bounds_geometry": ["POLYGON((166.5 -77.5,166.55 -77.5,166.6 -77.5,166.65 -77.5,166.7 -77.5,166.75 -77.5,166.8 -77.5,166.85 -77.5,166.9 -77.5,166.95 -77.5,167 -77.5,167 -77.55,167 -77.6,167 -77.65,167 -77.7,167 -77.75,167 -77.8,167 -77.85,167 -77.9,167 -77.95,167 -78,166.95 -78,166.9 -78,166.85 -78,166.8 -78,166.75 -78,166.7 -78,166.65 -78,166.6 -78,166.55 -78,166.5 -78,166.5 -77.95,166.5 -77.9,166.5 -77.85,166.5 -77.8,166.5 -77.75,166.5 -77.7,166.5 -77.65,166.5 -77.6,166.5 -77.55,166.5 -77.5))"], "date_created": "Mon, 07 Aug 2017 00:00:00 GMT", "description": "This dataset includes data from the publication Flynn and Todgham 2017 - Thermal windows and metabolic performance curves in a developing Antarctic fish. Included are data on embryo survival, development, and metabolic rate.", "east": 167.0, "geometry": ["POINT(166.75 -77.75)"], "keywords": "Antarctica; Biota; Fish; McMurdo Sound; Oceans; Ross Sea; Sample/collection Description; Sample/Collection Description; Southern Ocean", "locations": "Southern Ocean; Antarctica; McMurdo Sound; Ross Sea", "north": -77.5, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Todgham, Anne; Miller, Nathan", "project_titles": "RUI: Synergistic effects of Ocean Acidification and Warming on Larval Development in Antarctic Fishes", "projects": [{"proj_uid": "p0000411", "repository": "USAP-DC", "title": "RUI: Synergistic effects of Ocean Acidification and Warming on Larval Development in Antarctic Fishes"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Thermal windows and metabolic performance curves in a developing Antarctic fish", "uid": "601040", "west": 166.5}, {"awards": "1142122 Miller, Nathan", "bounds_geometry": ["POLYGON((166 -77.5,166.1 -77.5,166.2 -77.5,166.3 -77.5,166.4 -77.5,166.5 -77.5,166.6 -77.5,166.7 -77.5,166.8 -77.5,166.9 -77.5,167 -77.5,167 -77.55,167 -77.6,167 -77.65,167 -77.7,167 -77.75,167 -77.8,167 -77.85,167 -77.9,167 -77.95,167 -78,166.9 -78,166.8 -78,166.7 -78,166.6 -78,166.5 -78,166.4 -78,166.3 -78,166.2 -78,166.1 -78,166 -78,166 -77.95,166 -77.9,166 -77.85,166 -77.8,166 -77.75,166 -77.7,166 -77.65,166 -77.6,166 -77.55,166 -77.5))"], "date_created": "Mon, 07 Aug 2017 00:00:00 GMT", "description": "This dataset includes data from the publication Davis et al - Antarctic emerald rockcod have the capacity to compensate for warming when uncoupled from CO2-acidification. Included are data on cardiorespiratory physiology, survival, metabolic rate, metabolic enzyme activity, behavior (scototaxis \u0026 activity) and seawater chemistry.", "east": 167.0, "geometry": ["POINT(166.5 -77.75)"], "keywords": "Antarctica; Biota; Chemistry:fluid; Chemistry:Fluid; CTD Data; Fish; McMurdo Sound; Ocean Acidification; Oceans; Physical Oceanography; Ross Sea; Southern Ocean", "locations": "McMurdo Sound; Antarctica; Ross Sea; Southern Ocean", "north": -77.5, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Todgham, Anne; Miller, Nathan", "project_titles": "RUI: Synergistic effects of Ocean Acidification and Warming on Larval Development in Antarctic Fishes", "projects": [{"proj_uid": "p0000411", "repository": "USAP-DC", "title": "RUI: Synergistic effects of Ocean Acidification and Warming on Larval Development in Antarctic Fishes"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Antarctic emerald rockcod have the capacity to compensate for warming when uncoupled from CO2-acidification", "uid": "601039", "west": 166.0}, {"awards": "1142007 Kurbatov, Andrei", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Thu, 03 Aug 2017 00:00:00 GMT", "description": "This dataset contains ice core tephra geochemical data from 5 temporal intervals in the RICE, WDC-06A, SPRESSO, and SPICE ice cores. The temporal intervals included are 1991 C.E., 1963 C.E., 1815 C.E., 1809 C.E., and 1257 C.E. These intervals are often analyzed for volcanic sulfate by ice core scientists. The volcanic events associated with these intervals caused global weather and climate phenomena and are often used by climate modelers as well to understand volcanic sulfate loading on the climate.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Geochronology; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Intracontinental Magmatism; IntraContinental Magmatism; Tephra", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": null, "persons": "Kurbatov, Andrei V.", "project_titles": "Collaborative Research: Developing an Antarctic Tephra Database for Interdisciplinary Paleoclimate Research (AntT)", "projects": [{"proj_uid": "p0000328", "repository": "USAP-DC", "title": "Collaborative Research: Developing an Antarctic Tephra Database for Interdisciplinary Paleoclimate Research (AntT)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -90.0, "title": "Antarctic Ice Core Tephra Analysis", "uid": "601038", "west": -180.0}, {"awards": "1246190 Yu, Zicheng", "bounds_geometry": ["POLYGON((-68.5 -64,-67.73 -64,-66.96 -64,-66.19 -64,-65.42 -64,-64.65 -64,-63.88 -64,-63.11 -64,-62.34 -64,-61.57 -64,-60.8 -64,-60.8 -64.36,-60.8 -64.72,-60.8 -65.08,-60.8 -65.44,-60.8 -65.8,-60.8 -66.16,-60.8 -66.52,-60.8 -66.88,-60.8 -67.24,-60.8 -67.6,-61.57 -67.6,-62.34 -67.6,-63.11 -67.6,-63.88 -67.6,-64.65 -67.6,-65.42 -67.6,-66.19 -67.6,-66.96 -67.6,-67.73 -67.6,-68.5 -67.6,-68.5 -67.24,-68.5 -66.88,-68.5 -66.52,-68.5 -66.16,-68.5 -65.8,-68.5 -65.44,-68.5 -65.08,-68.5 -64.72,-68.5 -64.36,-68.5 -64))"], "date_created": "Mon, 24 Jul 2017 00:00:00 GMT", "description": "We used subfossil mosses and peats to document changes in regional climate, cryosphere, and terrestrial ecosystems in the western Antarctic Peninsula at ~65S latitude. We find that most peat-forming ecosystems have initiated since 2800 cal BP, in response to warmer summers and increasing summer insolation. The period at 900-600 cal BP was coldest as indicated by ice advance, abundance of kill ages from ice-entombed mosses exposed recently from retreating glacial ice, and apparent gap in peatbank initiation. Furthermore, the discovery of a novel Antarctic hairgrass (Deschampsia antarctica) peatland at 2300-1200 cal BP from the mainland Antarctic Peninsula suggests a much warmer climate than the present. A warming and wetting climate in the 1980s caused very high carbon accumulation in a Polytrichum strictum moss peatbank. Our results document dramatic transformations of landscape and ecosystems in response to past warmer climate, providing a telltale sign for what may come in the future.", "east": -60.8, "geometry": ["POINT(-64.65 -65.8)"], "keywords": "Antarctica; Antarctic Peninsula; Biota; Moss; Paleoclimate; Sample/collection Description; Sample/Collection Description", "locations": "Antarctic Peninsula; Antarctica", "north": -64.0, "nsf_funding_programs": null, "persons": "Yu, Zicheng", "project_titles": "Collaborative Research: Response of Carbon Accumulation in Moss Peatbanks to Past Warm Climates in the Antarctic Peninsula", "projects": [{"proj_uid": "p0000341", "repository": "USAP-DC", "title": "Collaborative Research: Response of Carbon Accumulation in Moss Peatbanks to Past Warm Climates in the Antarctic Peninsula"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -67.6, "title": "Late Holocene paleoecological and paleoclimatic data from moss peatbanks in the western Antarctic Peninsula", "uid": "601037", "west": -68.5}, {"awards": "0636740 Kreutz, Karl", "bounds_geometry": ["POINT(-112.086 -79.468)"], "date_created": "Tue, 11 Jul 2017 00:00:00 GMT", "description": "We present several related datasets from a 2012 snow pit and a 2013 firn core collected near the WAIS Divide field camp in West Antarctica. The data include soluble ions (sodium and non-sea-salt sulfate) and dust particle concentrations, as well as major oxide geochemistry of tephra grains isolated from snow samples. Based on these data, we found evidence of deposition from the 2011 Puyehue Cordon-Caulle (Chile) volcanic eruption at WAIS Divide.", "east": -112.086, "geometry": ["POINT(-112.086 -79.468)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Geochronology; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Intracontinental Magmatism; IntraContinental Magmatism; Snow Pit; Tephra; WAIS Divide; WAIS Divide Ice Core", "locations": "WAIS Divide; Antarctica", "north": -79.468, "nsf_funding_programs": null, "persons": "Koffman, Bess; Kreutz, Karl", "project_titles": "Collaborative Research: Microparticle/tephra analysis of the WAIS Divide ice core", "projects": [{"proj_uid": "p0000040", "repository": "USAP-DC", "title": "Collaborative Research: Microparticle/tephra analysis of the WAIS Divide ice core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.468, "title": "Snowpit evidence of the 2011 Puyehue-Cordon Caulle (Chile) eruption in West Antarctica", "uid": "601036", "west": -112.086}, {"awards": "1142129 Lamanna, Matthew; 1141820 Clarke, Julia", "bounds_geometry": ["POLYGON((-60 -63.5,-59.6 -63.5,-59.2 -63.5,-58.8 -63.5,-58.4 -63.5,-58 -63.5,-57.6 -63.5,-57.2 -63.5,-56.8 -63.5,-56.4 -63.5,-56 -63.5,-56 -63.7,-56 -63.9,-56 -64.1,-56 -64.3,-56 -64.5,-56 -64.7,-56 -64.9,-56 -65.1,-56 -65.3,-56 -65.5,-56.4 -65.5,-56.8 -65.5,-57.2 -65.5,-57.6 -65.5,-58 -65.5,-58.4 -65.5,-58.8 -65.5,-59.2 -65.5,-59.6 -65.5,-60 -65.5,-60 -65.3,-60 -65.1,-60 -64.9,-60 -64.7,-60 -64.5,-60 -64.3,-60 -64.1,-60 -63.9,-60 -63.7,-60 -63.5))"], "date_created": "Fri, 30 Jun 2017 00:00:00 GMT", "description": "We provide three-dimensional digital reconstructions, generated from computed tomographic (CT) data, of the vocal organs of the Antarctic Cretaceous bird Vegavis iaai (MACN-PV 19.748) and the North American Paleogene bird Presbyornis sp. (USNM PAL 617185). These were published as online Supplementary Information for the following paper: \n\nClarke, J.A., Chatterjee, S., Li, Z., Riede, T., Agnolin, F., Goller, F., Isasi, M.P., Martinioni, D.R., Mussel, F.J. and Novas, F.E., 2016. Fossil evidence of the avian vocal organ from the Mesozoic. Nature 538: 502-505.", "east": -56.0, "geometry": ["POINT(-58 -64.5)"], "keywords": "Antarctica; Biota; Birds", "locations": "Antarctica", "north": -63.5, "nsf_funding_programs": null, "persons": "Lamanna, Matthew; Salisbury, Steven; Clarke, Julia", "project_titles": "Collaborative Research: Late Cretaceous-Paleogene Vertebrates from Antarctica: Implications for Paleobiogeography, Paleoenvironment, and Extinction in Polar Gondwana", "projects": [{"proj_uid": "p0000380", "repository": "USAP-DC", "title": "Collaborative Research: Late Cretaceous-Paleogene Vertebrates from Antarctica: Implications for Paleobiogeography, Paleoenvironment, and Extinction in Polar Gondwana"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.5, "title": "3D digital reconstructions of vocal organs of Antarctic Cretaceous bird Vegavis and Paleogene bird Presbyornis", "uid": "601035", "west": -60.0}, {"awards": "0839093 McConnell, Joseph", "bounds_geometry": ["POLYGON((161.41425 -77.73489,161.486884 -77.73489,161.559518 -77.73489,161.632152 -77.73489,161.704786 -77.73489,161.77742 -77.73489,161.850054 -77.73489,161.922688 -77.73489,161.995322 -77.73489,162.067956 -77.73489,162.14059 -77.73489,162.14059 -77.747868,162.14059 -77.760846,162.14059 -77.773824,162.14059 -77.786802,162.14059 -77.79978,162.14059 -77.812758,162.14059 -77.825736,162.14059 -77.838714,162.14059 -77.851692,162.14059 -77.86467,162.067956 -77.86467,161.995322 -77.86467,161.922688 -77.86467,161.850054 -77.86467,161.77742 -77.86467,161.704786 -77.86467,161.632152 -77.86467,161.559518 -77.86467,161.486884 -77.86467,161.41425 -77.86467,161.41425 -77.851692,161.41425 -77.838714,161.41425 -77.825736,161.41425 -77.812758,161.41425 -77.79978,161.41425 -77.786802,161.41425 -77.773824,161.41425 -77.760846,161.41425 -77.747868,161.41425 -77.73489))"], "date_created": "Mon, 19 Jun 2017 00:00:00 GMT", "description": "Black carbon (BC) and other biomass-burning (BB) aerosols are critical components of climate forcing but quantification, predictive climate modeling, and policy decisions have been hampered by limited understanding of the climate drivers of BB and by the lack of long-term records. Prior modeling studies suggested that increased Northern Hemisphere anthropogenic BC emissions increased recent temperatures and regional precipitation, including a northward shift in the Inter-Tropical Convergence Zone (ITCZ). Two Antarctic ice cores were analyzed for BC and the longest record shows that the highest BC deposition during the Holocene occurred ~8-6k years before present in a period of relatively high austral burning season and low growing season insolation. Atmospheric transport modeling suggests South America (SA) as the dominant source of modern Antarctic BC and, consistent with the ice-core record, climate model experiments using mid-Holocene and preindustrial insolation simulate comparable increases in carbon loss due to fires in SA during the mid-Holocene. SA climate proxies document a northward shifted ITCZ and weakened SA Summer Monsoon (SASM) during this period, with associated impacts on hydroclimate and burning. A second Antarctic ice core spanning the last 2.5k years documents similar linkages between hydroclimate and BC, with the lowest deposition during the Little Ice Age characterized by a southerly shifted ITCZ and strengthened SASM. These new results indicate that insolation-driven changes in SA hydroclimate and BB, likely linked to the position of the ITCZ, modulated Antarctic BC deposition during most of the Holocene and suggests connections and feedbacks between future BC emissions and hydroclimate.", "east": 162.14059, "geometry": ["POINT(161.77742 -77.79978)"], "keywords": "Antarctica; Atmosphere; Black Carbon; Chemistry:ice; Chemistry:Ice; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; WAIS Divide; WAIS Divide Ice Core", "locations": "WAIS Divide; Antarctica", "north": -77.73489, "nsf_funding_programs": null, "persons": "McConnell, Joseph; Arienzo, Monica", "project_titles": "Collaborative Research: Integrated High Resolution Chemical and Biological Measurements on the Deep WAIS Divide Core", "projects": [{"proj_uid": "p0000273", "repository": "USAP-DC", "title": "Collaborative Research: Integrated High Resolution Chemical and Biological Measurements on the Deep WAIS Divide Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -77.86467, "title": "Holocene Black Carbon in Antarctica", "uid": "601034", "west": 161.41425}, {"awards": "0839031 Severinghaus, Jeffrey", "bounds_geometry": ["POLYGON((161.41425 -77.73489,161.486884 -77.73489,161.559518 -77.73489,161.632152 -77.73489,161.704786 -77.73489,161.77742 -77.73489,161.850054 -77.73489,161.922688 -77.73489,161.995322 -77.73489,162.067956 -77.73489,162.14059 -77.73489,162.14059 -77.747868,162.14059 -77.760846,162.14059 -77.773824,162.14059 -77.786802,162.14059 -77.79978,162.14059 -77.812758,162.14059 -77.825736,162.14059 -77.838714,162.14059 -77.851692,162.14059 -77.86467,162.067956 -77.86467,161.995322 -77.86467,161.922688 -77.86467,161.850054 -77.86467,161.77742 -77.86467,161.704786 -77.86467,161.632152 -77.86467,161.559518 -77.86467,161.486884 -77.86467,161.41425 -77.86467,161.41425 -77.851692,161.41425 -77.838714,161.41425 -77.825736,161.41425 -77.812758,161.41425 -77.79978,161.41425 -77.786802,161.41425 -77.773824,161.41425 -77.760846,161.41425 -77.747868,161.41425 -77.73489))"], "date_created": "Fri, 16 Jun 2017 00:00:00 GMT", "description": "Taylor Glacier Gas Isotope Data", "east": 162.14059, "geometry": ["POINT(161.77742 -77.79978)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciology; Ice Core Records; Isotope; Solid Earth; Taylor Glacier; Transantarctic Mountains", "locations": "Antarctica; Taylor Glacier; Transantarctic Mountains", "north": -77.73489, "nsf_funding_programs": null, "persons": "Severinghaus, Jeffrey P.", "project_titles": "Collaborative Research: A \"Horizontal Ice Core\" for Large-Volume Samples of the Past Atmosphere, Taylor Glacier, Antarctica", "projects": [{"proj_uid": "p0000099", "repository": "USAP-DC", "title": "Collaborative Research: A \"Horizontal Ice Core\" for Large-Volume Samples of the Past Atmosphere, Taylor Glacier, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.86467, "title": "Taylor Glacier Gas Isotope Data", "uid": "601033", "west": 161.41425}, {"awards": "1141993 Rich, Jeremy", "bounds_geometry": ["POINT(-64.05 -64.77)"], "date_created": "Mon, 12 Jun 2017 00:00:00 GMT", "description": "From winter to late summer during the 2013-2014 season at Palmer Station, Antarctica, we collected weekly to bi-weekly samples of the seawater intake to measure changes in bacterial community composition, based on sequencing 16S rRNA genes. Along with the sequences, we collected data on environmental parameters in the samples (chlorophyll a, bacterial production, salinity, nutrients, bacterial cell numbers, and particulate organic carbon and nitrogen).", "east": -64.05, "geometry": ["POINT(-64.05 -64.77)"], "keywords": "Antarctica; Antarctic Peninsula; Bacteria; Biota; Genetic; Geochemistry; Palmer Station; Sample/collection Description; Sample/Collection Description; Sea Water; Southern Ocean", "locations": "Antarctic Peninsula; Antarctica; Palmer Station; Southern Ocean", "north": -64.77, "nsf_funding_programs": null, "persons": "Rich, Jeremy", "project_titles": "Collaborative Research: Microbial Community Assembly in Coastal Waters of the Western Antarctic Peninsula", "projects": [{"proj_uid": "p0000409", "repository": "USAP-DC", "title": "Collaborative Research: Microbial Community Assembly in Coastal Waters of the Western Antarctic Peninsula"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.77, "title": "Seasonal Succession of Bacterial Communities in Coastal Waters of the Western Antarctic Peninsula", "uid": "601032", "west": -64.05}, {"awards": "1341360 Steig, Eric", "bounds_geometry": ["POINT(106 -77.5)", "POINT(-112.08 -79.46)"], "date_created": "Mon, 05 Jun 2017 00:00:00 GMT", "description": "Seasonal 17O Isotope Data from Lake Vostok and WAIS Divide Snow Pits", "east": 106.0, "geometry": ["POINT(106 -77.5)", "POINT(-112.08 -79.46)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Isotope; Lake Vostok; Snow Pit; WAIS Divide Ice Core", "locations": "Lake Vostok; Antarctica", "north": -77.5, "nsf_funding_programs": null, "persons": "Steig, Eric J.; Schoenemann, Spruce", "project_titles": "Development of a Laser Spectroscopy System for Analysis of 17Oexcess on Ice Cores", "projects": [{"proj_uid": "p0000316", "repository": "USAP-DC", "title": "Development of a Laser Spectroscopy System for Analysis of 17Oexcess on Ice Cores"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.46, "title": "Seasonal 17O Isotope Data from Lake Vostok and WAIS Divide Snow Pits", "uid": "601031", "west": -112.08}, {"awards": "1142122 Miller, Nathan", "bounds_geometry": ["POLYGON((166.163 -76.665,166.2635 -76.665,166.364 -76.665,166.4645 -76.665,166.565 -76.665,166.6655 -76.665,166.766 -76.665,166.8665 -76.665,166.967 -76.665,167.0675 -76.665,167.168 -76.665,167.168 -76.782,167.168 -76.899,167.168 -77.016,167.168 -77.133,167.168 -77.25,167.168 -77.367,167.168 -77.484,167.168 -77.601,167.168 -77.718,167.168 -77.835,167.0675 -77.835,166.967 -77.835,166.8665 -77.835,166.766 -77.835,166.6655 -77.835,166.565 -77.835,166.4645 -77.835,166.364 -77.835,166.2635 -77.835,166.163 -77.835,166.163 -77.718,166.163 -77.601,166.163 -77.484,166.163 -77.367,166.163 -77.25,166.163 -77.133,166.163 -77.016,166.163 -76.899,166.163 -76.782,166.163 -76.665))"], "date_created": "Thu, 01 Jun 2017 00:00:00 GMT", "description": "This dataset includes data from the publication \"Flynn, et al. (2015) - Ocean acidification exerts negative effects under warming conditions in a developing Antarctic fish\". Included are data on embryo survival, development, metabolic rate, metabolic enzyme activity (citrate synthase), whole embryo osmolality and seawater chemistry.", "east": 167.168, "geometry": ["POINT(166.6655 -77.25)"], "keywords": "Antarctica; Biota; Chemistry:fluid; Chemistry:Fluid; CTD Data; Fish; McMurdo Sound; Ocean Acidification; Oceans; Physical Oceanography; Ross Sea; Southern Ocean", "locations": "Antarctica; McMurdo Sound; Ross Sea; Southern Ocean", "north": -76.665, "nsf_funding_programs": null, "persons": "Miller, Nathan; Todgham, Anne; Davis, Brittany; Flynn, Erin", "project_titles": "RUI: Synergistic effects of Ocean Acidification and Warming on Larval Development in Antarctic Fishes", "projects": [{"proj_uid": "p0000411", "repository": "USAP-DC", "title": "RUI: Synergistic effects of Ocean Acidification and Warming on Larval Development in Antarctic Fishes"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.835, "title": "Physiological and biochemical measurements on Antarctic dragonfish (Gymnodraco acuticeps) from McMurdo Sound", "uid": "601026", "west": 166.163}, {"awards": "0944266 Twickler, Mark; 0944348 Taylor, Kendrick", "bounds_geometry": ["POINT(-112.08 -79.46)"], "date_created": "Thu, 01 Jun 2017 00:00:00 GMT", "description": "Qualitative assessment of ice-core quality versus depth for the deep WAIS Divide WDC06A ice core. The depths and core quality ratings presented here are from the field observations made at WAIS Divide, Antarctica, during the course of the drilling of the ice core. Depths are in meters. Core quality ratings were defined are as follows. Excellent: -1 breaks/no fractures; Very Good: -2 breaks/90% no fractures; Good: -3 breaks/50% no fractures; Fair: \u003e10 cm without fractures; Poor: \u003e10 cm without through fractures; Very Poor: \u003c10 cm without through fractures.", "east": -112.08, "geometry": ["POINT(-112.08 -79.46)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; WAIS Divide Ice Core", "locations": "Antarctica", "north": -79.46, "nsf_funding_programs": null, "persons": "Taylor, Kendrick C.; Souney, Joseph Jr.; Twickler, Mark", "project_titles": "Collaborative Research: Climate, Ice Dynamics and Biology using a Deep Ice Core from the West Antarctic Ice Sheet Ice Divide", "projects": [{"proj_uid": "p0000080", "repository": "USAP-DC", "title": "Collaborative Research: Climate, Ice Dynamics and Biology using a Deep Ice Core from the West Antarctic Ice Sheet Ice Divide"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.46, "title": "WAIS Divide WDC06A Core Quality Versus Depth", "uid": "601030", "west": -112.08}, {"awards": "1443554 Buys, Emmanuel", "bounds_geometry": ["POLYGON((166.163 -76.665,166.2635 -76.665,166.364 -76.665,166.4645 -76.665,166.565 -76.665,166.6655 -76.665,166.766 -76.665,166.8665 -76.665,166.967 -76.665,167.0675 -76.665,167.168 -76.665,167.168 -76.782,167.168 -76.899,167.168 -77.016,167.168 -77.133,167.168 -77.25,167.168 -77.367,167.168 -77.484,167.168 -77.601,167.168 -77.718,167.168 -77.835,167.0675 -77.835,166.967 -77.835,166.8665 -77.835,166.766 -77.835,166.6655 -77.835,166.565 -77.835,166.4645 -77.835,166.364 -77.835,166.2635 -77.835,166.163 -77.835,166.163 -77.718,166.163 -77.601,166.163 -77.484,166.163 -77.367,166.163 -77.25,166.163 -77.133,166.163 -77.016,166.163 -76.899,166.163 -76.782,166.163 -76.665))"], "date_created": "Sat, 27 May 2017 00:00:00 GMT", "description": "The Weddell seal is a champion diving mammal - key elements of their physiological specializations to breath-hold are their ability for remarkable adjustment of their heart and blood vessel system, coordinating blood pressure and flow to specific body regions based on their metabolic requirements, and their ability to sustain periods without oxygen. The goal of this study is to unravel the molecular mechanisms underlying the dive response, specifically, to study a signaling pathway that coordinates local blood flow. This dataset identifies what animals were sampled and the details of what biosamples were collected to test the hypothesis that signaling modifications prevent local blood vessel changes under low oxygen conditions, thereby allowing the centrally mediated diving reflex to override local perfusion control. The metadata also details cryopreserved cells and cell lines that can be used to study the molecular effects of low oxygen conditions in the laboratory", "east": 167.168, "geometry": ["POINT(166.6655 -77.25)"], "keywords": "Antarctica; Biota; McMurdo Sound; Ross Sea; Sample/collection Description; Sample/Collection Description; Seals", "locations": "Antarctica; McMurdo Sound; Ross Sea", "north": -76.665, "nsf_funding_programs": null, "persons": "Hindle, Allyson; Buys, Emmanuel", "project_titles": "Unraveling the Genomic and Molecular Basis of the Dive Response: Nitric Oxide Signaling and Vasoregulation in the Weddell Seal", "projects": [{"proj_uid": "p0000072", "repository": "USAP-DC", "title": "Unraveling the Genomic and Molecular Basis of the Dive Response: Nitric Oxide Signaling and Vasoregulation in the Weddell Seal"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.835, "title": "Biosamples and observations from Weddell Seal colonies in McMurdo Sound during the 2015-2016 Antarctic field season", "uid": "601028", "west": 166.163}, {"awards": "1246463 Burns, Jennifer", "bounds_geometry": ["POINT(166.55 -77.75)"], "date_created": "Wed, 24 May 2017 00:00:00 GMT", "description": "This dataset includes an inventory of Weddell Seals captured by net, tagged, and observed at colonies in the Erebus Bay region of Antarctica during 4 austral field seasons between November 2013 and February 2017. Observations recorded include body mass, length, and molt category.", "east": 166.55, "geometry": ["POINT(166.55 -77.75)"], "keywords": "Antarctica; Biota; McMurdo Sound; Oceans; Ross Sea; Sample/collection Description; Sample/Collection Description; Seals", "locations": "Antarctica; McMurdo Sound; Ross Sea", "north": -77.75, "nsf_funding_programs": null, "persons": "Burns, Jennifer", "project_titles": "The Cost of A New Fur Coat: Interactions between Molt and Reproduction in Weddell Seals", "projects": [{"proj_uid": "p0000229", "repository": "USAP-DC", "title": "The Cost of A New Fur Coat: Interactions between Molt and Reproduction in Weddell Seals"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.75, "title": "Specimen logs and observations from Weddell Seal colonies in Erebus Bay, 2013-2017", "uid": "601027", "west": 166.55}, {"awards": "1245659 Petrenko, Vasilii", "bounds_geometry": ["POINT(161.71353 -77.75855)"], "date_created": "Wed, 24 May 2017 00:00:00 GMT", "description": "This dataset contains measurements of paleoatmospheric 14C of methane (14CH4) for the Younger Dryas - Preboreal Transition from Taylor Glacier, Antarctica, as well as a range of supporting data. The supporting data include [CH4], [CO], [14CO], sample ages, CH4 emissions and analysis of uncertainties.", "east": 161.71353, "geometry": ["POINT(161.71353 -77.75855)"], "keywords": "Antarctica; Chemistry:rock; Chemistry:Rock; Critical Zone; Geochemistry; Methane; Paleoclimate; Sample/collection Description; Sample/Collection Description; Solid Earth; Taylor Glacier; Transantarctic Mountains; Younger Dryas", "locations": "Antarctica; Taylor Glacier; Transantarctic Mountains", "north": -77.75855, "nsf_funding_programs": null, "persons": "Petrenko, Vasilii; Severinghaus, Jeffrey P.", "project_titles": "Collaborative Research: A \"Horizontal Ice Core\" for Large-Volume Samples of the Past Atmosphere, Taylor Glacier, Antarctica", "projects": [{"proj_uid": "p0000099", "repository": "USAP-DC", "title": "Collaborative Research: A \"Horizontal Ice Core\" for Large-Volume Samples of the Past Atmosphere, Taylor Glacier, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.75855, "title": "Measurements of 14C-methane for the Younger Dryas - Preboreal Transition from Taylor Glacier, Antarctica", "uid": "601029", "west": 161.71353}, {"awards": "1142122 Miller, Nathan", "bounds_geometry": ["POLYGON((166.163 -76.665,166.2635 -76.665,166.364 -76.665,166.4645 -76.665,166.565 -76.665,166.6655 -76.665,166.766 -76.665,166.8665 -76.665,166.967 -76.665,167.0675 -76.665,167.168 -76.665,167.168 -76.782,167.168 -76.899,167.168 -77.016,167.168 -77.133,167.168 -77.25,167.168 -77.367,167.168 -77.484,167.168 -77.601,167.168 -77.718,167.168 -77.835,167.0675 -77.835,166.967 -77.835,166.8665 -77.835,166.766 -77.835,166.6655 -77.835,166.565 -77.835,166.4645 -77.835,166.364 -77.835,166.2635 -77.835,166.163 -77.835,166.163 -77.718,166.163 -77.601,166.163 -77.484,166.163 -77.367,166.163 -77.25,166.163 -77.133,166.163 -77.016,166.163 -76.899,166.163 -76.782,166.163 -76.665))"], "date_created": "Sat, 20 May 2017 00:00:00 GMT", "description": "This dataset includes data from the publication \"Davis, et al. (2016) - Juvenile Antarctic rockcod (Trematomus bernacchii) are physiologically robust to CO2-acidified seawater\". Included are data on cardiorespiratory physiology, survival, metabolic rate, metabolic enzyme activity (citrate synthase) and seawater chemistry.", "east": 167.168, "geometry": ["POINT(166.6655 -77.25)"], "keywords": "Antarctica; Biota; Fish; McMurdo Sound; Oceans; Ross Sea; Southern Ocean", "locations": "Ross Sea; Antarctica; McMurdo Sound; Southern Ocean", "north": -76.665, "nsf_funding_programs": null, "persons": "Miller, Nathan; Todgham, Anne; Davis, Brittany; Flynn, Erin", "project_titles": "RUI: Synergistic effects of Ocean Acidification and Warming on Larval Development in Antarctic Fishes", "projects": [{"proj_uid": "p0000411", "repository": "USAP-DC", "title": "RUI: Synergistic effects of Ocean Acidification and Warming on Larval Development in Antarctic Fishes"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.835, "title": "Physiological and biochemical measurements on juvenile Antarctic rockcod (Trematomus bernacchii) from McMurdo Sound", "uid": "601025", "west": 166.163}, {"awards": "1553824 Heine, John", "bounds_geometry": ["POLYGON((163 -78,163.4 -78,163.8 -78,164.2 -78,164.6 -78,165 -78,165.4 -78,165.8 -78,166.2 -78,166.6 -78,167 -78,167 -78.05,167 -78.1,167 -78.15,167 -78.2,167 -78.25,167 -78.3,167 -78.35,167 -78.4,167 -78.45,167 -78.5,166.6 -78.5,166.2 -78.5,165.8 -78.5,165.4 -78.5,165 -78.5,164.6 -78.5,164.2 -78.5,163.8 -78.5,163.4 -78.5,163 -78.5,163 -78.45,163 -78.4,163 -78.35,163 -78.3,163 -78.25,163 -78.2,163 -78.15,163 -78.1,163 -78.05,163 -78))"], "date_created": "Fri, 12 May 2017 00:00:00 GMT", "description": "Overall dataset and specific temperature data for a number of different rebreather models.", "east": 167.0, "geometry": ["POINT(165 -78.25)"], "keywords": "Antarctica; Diving; Global; Physical Oceanography", "locations": "Antarctica; Global", "north": -78.0, "nsf_funding_programs": null, "persons": "Heine, John", "project_titles": "Rebreather Testing for the United States Antarctic Scientific Diving Program", "projects": [{"proj_uid": "p0000377", "repository": "USAP-DC", "title": "Rebreather Testing for the United States Antarctic Scientific Diving Program"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.5, "title": "Rebreather Testing for the United States Antarctic Scientific Diving Program", "uid": "601024", "west": 163.0}, {"awards": "0636740 Kreutz, Karl", "bounds_geometry": ["POINT(-112.1115 -79.481)"], "date_created": "Thu, 27 Apr 2017 00:00:00 GMT", "description": "This dataset includes discrete ICP-MS chemistry data generated at the University of Maine for the top 577 m of the WAIS Divide deep ice core (WDC06A). There are two parallel datasets, produced from a single set of samples that were melted continuously, collected by fraction collector and split manually (by pouring). The first set was acidified to 10% v/v nitric acid and allowed to leach for one month prior to analysis. These are referred to as \"total\" samples (see below). The second set were filtered using individual hand-held 0.45 um filters and syringes, then acidified to 10% v/v nitric acid and analyzed. These are referred to as \"dissolved\" samples. Reported depths are based on values assigned during melting; please note that these are subject to change. Please contact Karl and Bess if you plan to use the data or have any questions.", "east": -112.1115, "geometry": ["POINT(-112.1115 -79.481)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; ICP-MS; Isotope; WAIS Divide; WAIS Divide Ice Core", "locations": "Antarctica; WAIS Divide", "north": -79.481, "nsf_funding_programs": null, "persons": "Kreutz, Karl", "project_titles": "Collaborative Research: Microparticle/tephra analysis of the WAIS Divide ice core", "projects": [{"proj_uid": "p0000040", "repository": "USAP-DC", "title": "Collaborative Research: Microparticle/tephra analysis of the WAIS Divide ice core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.481, "title": "WAIS Divide WDC06A Discrete ICP-MS Chemistry", "uid": "601023", "west": -112.1115}, {"awards": "1246223 Hastings, Meredith", "bounds_geometry": ["POINT(-112.1115 -79.481)"], "date_created": "Wed, 26 Apr 2017 00:00:00 GMT", "description": "This dataset contains nitrate concentration and isotopic composition (d15N, d18O, D17O) measurements on the WAIS Divide WDC06A ice core.", "east": -112.1115, "geometry": ["POINT(-112.1115 -79.481)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Nitrate; WAIS Divide; WAIS Divide Ice Core", "locations": "Antarctica; WAIS Divide", "north": -79.481, "nsf_funding_programs": null, "persons": "Buffen, Aron; Hastings, Meredith", "project_titles": "Investigating Source, Chemistry and Climate changes using the Isotopic Composition of Nitrate in Antarctic Snow and Ice", "projects": [{"proj_uid": "p0000399", "repository": "USAP-DC", "title": "Investigating Source, Chemistry and Climate changes using the Isotopic Composition of Nitrate in Antarctic Snow and Ice"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.481, "title": "WAIS Divide WDC06A Nitrate Isotope Record", "uid": "601022", "west": -112.1115}, {"awards": "0944348 Taylor, Kendrick", "bounds_geometry": ["POINT(-112.1115 -79.481)"], "date_created": "Mon, 24 Apr 2017 00:00:00 GMT", "description": "This is a summary of results 2005-2016 from the NSF-funded WAIS Divide Ice Core project, compiled by the Science Coordination Office.", "east": -112.1115, "geometry": ["POINT(-112.1115 -79.481)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; WAIS Divide Ice Core", "locations": "Antarctica", "north": -79.481, "nsf_funding_programs": null, "persons": "Taylor, Kendrick C.", "project_titles": "Collaborative Research: Climate, Ice Dynamics and Biology using a Deep Ice Core from the West Antarctic Ice Sheet Ice Divide", "projects": [{"proj_uid": "p0000080", "repository": "USAP-DC", "title": "Collaborative Research: Climate, Ice Dynamics and Biology using a Deep Ice Core from the West Antarctic Ice Sheet Ice Divide"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.481, "title": "Summary of Results from the WAIS Divide Ice Core Project", "uid": "601021", "west": -112.1115}, {"awards": "1148982 Hansen, Samantha", "bounds_geometry": ["POLYGON((153.327 -73.032547,154.5063012 -73.032547,155.6856024 -73.032547,156.8649036 -73.032547,158.0442048 -73.032547,159.223506 -73.032547,160.4028072 -73.032547,161.5821084 -73.032547,162.7614096 -73.032547,163.9407108 -73.032547,165.120012 -73.032547,165.120012 -73.3530275,165.120012 -73.673508,165.120012 -73.9939885,165.120012 -74.314469,165.120012 -74.6349495,165.120012 -74.95543,165.120012 -75.2759105,165.120012 -75.596391,165.120012 -75.9168715,165.120012 -76.237352,163.9407108 -76.237352,162.7614096 -76.237352,161.5821084 -76.237352,160.4028072 -76.237352,159.223506 -76.237352,158.0442048 -76.237352,156.8649036 -76.237352,155.6856024 -76.237352,154.5063012 -76.237352,153.327 -76.237352,153.327 -75.9168715,153.327 -75.596391,153.327 -75.2759105,153.327 -74.95543,153.327 -74.6349495,153.327 -74.314469,153.327 -73.9939885,153.327 -73.673508,153.327 -73.3530275,153.327 -73.032547))"], "date_created": "Thu, 20 Apr 2017 00:00:00 GMT", "description": "Using data from the Transantarctic Mountains (TAMs) Northern Network, shear-wave splitting analysis has been employed to constrain azimuthal anisotropy beneath a portion of the northern TAMs. Splitting measurements were made for PKS, SKS, and SKKS phases with the eigenvalue method in SplitLab. The results show two distinct geographic regions of anisotropy: one behind the TAMs front and the other along the Ross Sea coastline. The anisotropic structure behind the TAMs front is best attributed to relict fabric associated with past tectonic episodes. Along the coastline, the anisotropy is interpreted to reflect mantle flow associated with rift-related decompression melting and Cenozoic extension.", "east": 165.120012, "geometry": ["POINT(159.223506 -74.6349495)"], "keywords": "Antarctica; Geology/Geophysics - Other; GPS; Sample/collection Description; Sample/Collection Description; Seismology; Shearwave Spitting; Solid Earth; Transantarctic Mountains", "locations": "Antarctica; Transantarctic Mountains", "north": -73.032547, "nsf_funding_programs": null, "persons": "Hansen, Samantha", "project_titles": "CAREER: Deciphering the Tectonic History of the Transantarctic Mountains and the Wilkes Subglacial Basin", "projects": [{"proj_uid": "p0000300", "repository": "USAP-DC", "title": "CAREER: Deciphering the Tectonic History of the Transantarctic Mountains and the Wilkes Subglacial Basin"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -76.237352, "title": "Shear Wave Splitting Analysis and Seismic Anisotropy beneath the Northern Transantarctic Mountains", "uid": "601019", "west": 153.327}, {"awards": "1148982 Hansen, Samantha", "bounds_geometry": ["POLYGON((153.327 -73.032547,154.5063012 -73.032547,155.6856024 -73.032547,156.8649036 -73.032547,158.0442048 -73.032547,159.223506 -73.032547,160.4028072 -73.032547,161.5821084 -73.032547,162.7614096 -73.032547,163.9407108 -73.032547,165.120012 -73.032547,165.120012 -73.3530275,165.120012 -73.673508,165.120012 -73.9939885,165.120012 -74.314469,165.120012 -74.6349495,165.120012 -74.95543,165.120012 -75.2759105,165.120012 -75.596391,165.120012 -75.9168715,165.120012 -76.237352,163.9407108 -76.237352,162.7614096 -76.237352,161.5821084 -76.237352,160.4028072 -76.237352,159.223506 -76.237352,158.0442048 -76.237352,156.8649036 -76.237352,155.6856024 -76.237352,154.5063012 -76.237352,153.327 -76.237352,153.327 -75.9168715,153.327 -75.596391,153.327 -75.2759105,153.327 -74.95543,153.327 -74.6349495,153.327 -74.314469,153.327 -73.9939885,153.327 -73.673508,153.327 -73.3530275,153.327 -73.032547))"], "date_created": "Thu, 20 Apr 2017 00:00:00 GMT", "description": "Using data from the Transantarctic Mountains (TAMs) Northern Network, the shear wave velocity structure beneath the northern TAMs was investigated with surface wave tomography. Rayleigh wave phase velocities were calculated using a two-plane wave approximation and were then inverted for shear velocity structure. The resulting model shows a low velocity zone (~4.24 km/s) at ~160 km depth offshore and adjacent to Mt. Melbourne that extends inland and vertically upwards to ~100 km depth beneath the northern TAMs and Victoria Land. Another low velocity zone (~4.16-4.24 km/s) is also seen at ~150 km depth beneath Ross Island, and relatively slow velocities (~4.24-4.32 km/s) along the Terror Rift connect the two low velocity zones. This structure has been interpreted to reflect rift-related decompression melting along the TAMs front, which would provide thermal buoyancy to uplift the mountain range.", "east": 165.120012, "geometry": ["POINT(159.223506 -74.6349495)"], "keywords": "Antarctica; Geology/Geophysics - Other; Model; Seismology; Solid Earth; Tomography; Transantarctic Mountains", "locations": "Transantarctic Mountains; Antarctica", "north": -73.032547, "nsf_funding_programs": null, "persons": "Hansen, Samantha", "project_titles": "CAREER: Deciphering the Tectonic History of the Transantarctic Mountains and the Wilkes Subglacial Basin", "projects": [{"proj_uid": "p0000300", "repository": "USAP-DC", "title": "CAREER: Deciphering the Tectonic History of the Transantarctic Mountains and the Wilkes Subglacial Basin"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -76.237352, "title": "Upper Mantle Shear Wave Velocity Structure beneath the Northern Transantarctic Mountains", "uid": "601018", "west": 153.327}, {"awards": "1148982 Hansen, Samantha", "bounds_geometry": ["POLYGON((153.327 -73.032547,154.5063012 -73.032547,155.6856024 -73.032547,156.8649036 -73.032547,158.0442048 -73.032547,159.223506 -73.032547,160.4028072 -73.032547,161.5821084 -73.032547,162.7614096 -73.032547,163.9407108 -73.032547,165.120012 -73.032547,165.120012 -73.3530275,165.120012 -73.673508,165.120012 -73.9939885,165.120012 -74.314469,165.120012 -74.6349495,165.120012 -74.95543,165.120012 -75.2759105,165.120012 -75.596391,165.120012 -75.9168715,165.120012 -76.237352,163.9407108 -76.237352,162.7614096 -76.237352,161.5821084 -76.237352,160.4028072 -76.237352,159.223506 -76.237352,158.0442048 -76.237352,156.8649036 -76.237352,155.6856024 -76.237352,154.5063012 -76.237352,153.327 -76.237352,153.327 -75.9168715,153.327 -75.596391,153.327 -75.2759105,153.327 -74.95543,153.327 -74.6349495,153.327 -74.314469,153.327 -73.9939885,153.327 -73.673508,153.327 -73.3530275,153.327 -73.032547))"], "date_created": "Thu, 06 Apr 2017 00:00:00 GMT", "description": "Stretching ~3,500 km across Antarctica, with peak elevations up to 4,500 m, the Transantarctic Mountains (TAMs) are the largest non-compressional mountain range on Earth and represent a tectonic boundary between the East Antarctica (EA) craton and the West Antarctic Rift System. The origin and uplift mechanism associated with the TAMs is controversial, and multiple models have been proposed. Seismic investigations of the TAMs\u0027 subsurface structure can provide key constraints to help evaluate these models, but previous studies have been primarily focused only on the central TAMs near Ross Island. Using data from the new 15-station Transantarctic Mountain Northern Network as well as data from several smaller networks, this study investigates the upper mantle velocity structure beneath a previously unexplored portion of the northern TAMs through regional body wave tomography. Relative travel-times were calculated for 11,182 P-wave and 8,285 S-wave arrivals from 790 and 581 Mw \u2265 5.5 events, respectively, using multi-channel cross correlation, and these data were then inverted for models of the upper mantle seismic structure. Resulting P- and S-wave tomography images reveal two focused low velocity anomalies beneath Ross Island (RI; \u03b4VP \u2248 -2.0%; \u03b4VS \u2248 -1.5% to -4.0%) and Terra Nova Bay (TNB; \u03b4VP \u2248 -1.5% to -2.0%; \u03b4VS \u2248 -1.0% to -4.0%) that extend to depths of ~200 and ~150 km, respectively. The RI and TNB slow anomalies also extend ~50-100 km laterally beneath the TAMs front and sharply abut fast velocities beneath the EA craton (\u03b4VP \u2248 0.5% to 2%; \u03b4VS \u2248 1.5% to 4.0%). A low velocity region (\u03b4VP \u2248 -1.5%), centered at ~150 km depth beneath the Terror Rift (TR) and primarily constrained within the Victoria Land Basin, connects the RI and TNB anomalies. The focused low velocities are interpreted as regions of partial melt and buoyancy-driven upwelling, connected by a broad region of slow (presumably warm) upper mantle associated with Cenozoic extension along the TR. Dynamic topography estimates based on the imaged S-wave velocity perturbations are consistent with observed surface topography in the central and northern TAMs, thereby providing support for uplift models that advocate for thermal loading and a flexural origin for the mountain range.", "east": 165.120012, "geometry": ["POINT(159.223506 -74.6349495)"], "keywords": "Antarctica; Geology/Geophysics - Other; Model; Seismology; Solid Earth; Tomography; Transantarctic Mountains", "locations": "Antarctica; Transantarctic Mountains", "north": -73.032547, "nsf_funding_programs": null, "persons": "Hansen, Samantha", "project_titles": "CAREER: Deciphering the Tectonic History of the Transantarctic Mountains and the Wilkes Subglacial Basin", "projects": [{"proj_uid": "p0000300", "repository": "USAP-DC", "title": "CAREER: Deciphering the Tectonic History of the Transantarctic Mountains and the Wilkes Subglacial Basin"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -76.237352, "title": "Upper Mantle Seismic Structure beneath the Northern Transantarctic Mountains from Regional P- and S-wave Tomography", "uid": "601017", "west": 153.327}, {"awards": "1246379 Smith, Nathan", "bounds_geometry": ["POLYGON((160 -85,160.6 -85,161.2 -85,161.8 -85,162.4 -85,163 -85,163.6 -85,164.2 -85,164.8 -85,165.4 -85,166 -85,166 -85.2,166 -85.4,166 -85.6,166 -85.8,166 -86,166 -86.2,166 -86.4,166 -86.6,166 -86.8,166 -87,165.4 -87,164.8 -87,164.2 -87,163.6 -87,163 -87,162.4 -87,161.8 -87,161.2 -87,160.6 -87,160 -87,160 -86.8,160 -86.6,160 -86.4,160 -86.2,160 -86,160 -85.8,160 -85.6,160 -85.4,160 -85.2,160 -85))"], "date_created": "Wed, 29 Mar 2017 00:00:00 GMT", "description": "This proposal supports research on the Early Jurassic Hanson Formation vertebrate fauna of the Beardmore Glacier region of Antarctica. The project supports preparation and systematic and paleobiological research on four Antarctic dinosaurs, including two new species, collected in the Central Transantarctic Mountains. With the new material Cryolophosaurus will become one of the most complete Early Jurassic theropods known, and thus has the potential to become a keystone taxon for resolving the debated early evolutionary history of theropod dinosaurs, the group that gave rise to birds. Two new dinosaur specimens include a nearly complete articulated skeleton of a juvenile sauropodomorph, and the articulated hip region of another small individual. Both appear to be new taxa. The dinosaurs from the Hanson Formation represent some of the highest paleolatitude vertebrates known from the Jurassic. The PIs generated CT datasets for Cryolophosaurus and the more complete new sauropodomorph species to mine for phylogenetic trait information, and to investigate their comparative neuroanatomy and feeding behavior. Histological datasets have been generated from multiple skeletal elements for all four Mt. Kirkpatrick taxa to understand patterns of growth in different clades of polar dinosaurs and compare them to relatives from lower paleolatitudes. This paleohistological study of a relatively diverse sample of sauropodomorph taxa from Antarctica may contribute to determining whether and how these dinosaurs responded to contemporary climatic extremes. The PIs have established a successful undergraduate training program as part of previous research. Summer interns from Augustana are trained at the Field Museum in specimen preparation, curation, molding/casting, and histological sampling. They also participate in existing Field Museum REU programs, including a course on phylogenetic systematics. Four undergraduate internships and student research projects will be supported through this proposal. A postdoctoral researcher has also been supported on this project The PIs are developing a traveling exhibit on Antarctic Dinosaurs that they estimate will be seen by over 2 million people over the five-year tour (opening June 2018 at the Field Museum of Natural History).", "east": 166.0, "geometry": ["POINT(163 -86)"], "keywords": "Antarctica; Beardmore Glacier; Biota; Fossil; Sample/collection Description; Sample/Collection Description; Solid Earth; Transantarctic Mountains", "locations": "Beardmore Glacier; Transantarctic Mountains; Antarctica", "north": -85.0, "nsf_funding_programs": null, "persons": "Smith, Nathan", "project_titles": "Collaborative Research: Continued Research on the Jurassic Vertebrate Fauna from the Beardmore Glacier Region of Antarctica", "projects": [{"proj_uid": "p0000083", "repository": "USAP-DC", "title": "Collaborative Research: Continued Research on the Jurassic Vertebrate Fauna from the Beardmore Glacier Region of Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -87.0, "title": "Vertebrate fossils from the Hanson Formation at Mt. Kirkpatrick, in the Beardmore Glacier region of Antarctica", "uid": "601016", "west": 160.0}, {"awards": "0538427 McConnell, Joseph", "bounds_geometry": ["POINT(-112.1115 -79.481)"], "date_created": "Tue, 28 Mar 2017 00:00:00 GMT", "description": "A state-of-the-art continuous ice core analytical system was used to analyze samples from 0 to ~130 m depth of the recently collected intermediate core WDC05A from West Antarctica. Interpretation of these records and publication of findings is ongoing.", "east": -112.1115, "geometry": ["POINT(-112.1115 -79.481)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Physical Properties; Snow Accumulation; WAIS Divide; WAIS Divide Ice Core", "locations": "Antarctica; WAIS Divide", "north": -79.481, "nsf_funding_programs": null, "persons": "McConnell, Joseph", "project_titles": "Trace and Ultra-Trace Chemistry Measurements of the WAIS Divide Ice Core", "projects": [{"proj_uid": "p0000148", "repository": "USAP-DC", "title": "Trace and Ultra-Trace Chemistry Measurements of the WAIS Divide Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.481, "title": "WAIS Divide Ice-Core Chronology from Intermediate Core WDC05A", "uid": "601012", "west": -112.1115}, {"awards": "0944197 Waddington, Edwin", "bounds_geometry": ["POINT(-112.1115 -79.481)"], "date_created": "Tue, 28 Mar 2017 00:00:00 GMT", "description": "The West Antarctic Ice Sheet Divide (WAIS Divide, WD) ice core is a newly drilled, high-accumulation deep ice core that provides Antarctic climate records of the past ~68 ka at unprecedented temporal resolution. The upper 2850 m (back to 31.2 ka BP) have been dated using annual-layer counting. Here we present a chronology for the deep part of the core (67.8-31.2 ka BP), which is based on stratigraphic matching to annual-layer-counted Greenland ice cores using globally well-mixed atmospheric methane. We calculate the WD gas age-ice age difference (Delta age) using a combination of firn densification modeling, ice-flow modeling, and a data set of d15N-N2, a proxy for past firn column thickness. The largest Delta age at WD occurs during the Last Glacial Maximum, and is 525 +/- 120 years. Internally consistent solutions can be found only when assuming little to no influence of impurity content on densification rates, contrary to a recently proposed hypothesis. We synchronize the WD chronology to a linearly scaled version of the layer-counted Greenland Ice Core Chronology (GICC05), which brings the age of Dansgaard-Oeschger (DO) events into agreement with the U/Th absolutely dated Hulu Cave speleothem record. The small Delta age at WD provides valuable opportunities to investigate the timing of atmospheric greenhouse gas variations relative to Antarctic climate, as well as the interhemispheric phasing of the \\\"bipolar seesaw\\\".\n\nWe present the WD2014 chronology for the upper part (0-2850 m; 31.2 ka BP) of the West Antarctic Ice Sheet (WAIS) Divide (WD) ice core. The chronology is based on counting of annual layers observed in the chemical, dust and electrical conductivity records. These layers are caused by seasonal changes in the source, transport, and deposition of aerosols. The measurements were interpreted manually and with the aid of two automated methods. We validated the chronology by comparing to two high-accuracy, absolutely dated chronologies. For the Holocene, the cosmogenic isotope records of 10Be from WAIS Divide and 14C for IntCal13 demonstrated that WD2014 was consistently accurate to better than 0.5% of the age. For the glacial period, comparisons to the Hulu Cave chronology demonstrated that WD2014 had an accuracy of better than 1% of the age at three abrupt climate change events between 27 and 31ka. WD2014 has consistently younger ages than Greenland ice core chronologies during most of the Holocene. For the Younger Dryas-Preboreal transition (11.595 ka; 24 years younger) and the Bolling-Allerod Warming (14.621 ka; 7 years younger), WD2014 ages are within the combined uncertainties of the timescales. Given its high accuracy, WD2014 can become a reference chronology for the Southern Hemisphere, with synchronization to other chronologies feasible using high-quality proxies of volcanism, solar activity, atmospheric mineral dust, and atmospheric methane concentrations.", "east": -112.1115, "geometry": ["POINT(-112.1115 -79.481)"], "keywords": "Antarctica; Depth-Age-Model; Geochronology; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; WAIS Divide; WAIS Divide Ice Core", "locations": "Antarctica; WAIS Divide", "north": -79.481, "nsf_funding_programs": null, "persons": "Fudge, T. J.", "project_titles": "Collaborative Research: Establishing the Chronology and Histories of Accumulation and Ice Dynamics for the WAIS Divide Core", "projects": [{"proj_uid": "p0000026", "repository": "USAP-DC", "title": "Collaborative Research: Establishing the Chronology and Histories of Accumulation and Ice Dynamics for the WAIS Divide Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.481, "title": "WD2014: Timescale for WAIS Divide Core 2006 A (WDC-06A)", "uid": "601015", "west": -112.1115}, {"awards": "0538427 McConnell, Joseph", "bounds_geometry": ["POINT(-112.1115 -79.481)"], "date_created": "Tue, 28 Mar 2017 00:00:00 GMT", "description": "A state-of-the-art continuous ice core analytical system was used to analyze samples from 0 to ~130 m depth of the recently collected intermediate core WDC05Q from West Antarctica. Interpretation of these records and publication of findings is ongoing.", "east": -112.1115, "geometry": ["POINT(-112.1115 -79.481)"], "keywords": "Antarctica; Depth-Age-Model; Geochronology; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; WAIS Divide; WAIS Divide Ice Core", "locations": "Antarctica; WAIS Divide", "north": -79.481, "nsf_funding_programs": null, "persons": "McConnell, Joseph", "project_titles": "Trace and Ultra-Trace Chemistry Measurements of the WAIS Divide Ice Core", "projects": [{"proj_uid": "p0000148", "repository": "USAP-DC", "title": "Trace and Ultra-Trace Chemistry Measurements of the WAIS Divide Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.481, "title": "WAIS Divide Ice-Core Chronology from Intermediate Core WDC05Q", "uid": "601013", "west": -112.1115}, {"awards": "0838849 Bender, Michael", "bounds_geometry": ["POLYGON((159.02 -76.67,159.057 -76.67,159.094 -76.67,159.131 -76.67,159.168 -76.67,159.205 -76.67,159.242 -76.67,159.279 -76.67,159.316 -76.67,159.353 -76.67,159.39 -76.67,159.39 -76.687,159.39 -76.704,159.39 -76.721,159.39 -76.738,159.39 -76.755,159.39 -76.772,159.39 -76.789,159.39 -76.806,159.39 -76.823,159.39 -76.84,159.353 -76.84,159.316 -76.84,159.279 -76.84,159.242 -76.84,159.205 -76.84,159.168 -76.84,159.131 -76.84,159.094 -76.84,159.057 -76.84,159.02 -76.84,159.02 -76.823,159.02 -76.806,159.02 -76.789,159.02 -76.772,159.02 -76.755,159.02 -76.738,159.02 -76.721,159.02 -76.704,159.02 -76.687,159.02 -76.67))"], "date_created": "Mon, 27 Mar 2017 00:00:00 GMT", "description": "Measurements of Ar isotopes (40Ar/38Ar/36Ar) and other gas species (18O/16O of O2, 15N/14N of N2, O2/N2 and Ar/N2 ratios) from ice cores drilled in the Allan Hills Blue Ice Area", "east": 159.39, "geometry": ["POINT(159.205 -76.755)"], "keywords": "Allan Hills; Antarctica; Argon; Chemistry:fluid; Chemistry:Fluid; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Isotope", "locations": "Allan Hills; Antarctica", "north": -76.67, "nsf_funding_programs": null, "persons": "Higgins, John", "project_titles": "Trace and Ultra-Trace Chemistry Measurements of the WAIS Divide Ice Core", "projects": [{"proj_uid": "p0000148", "repository": "USAP-DC", "title": "Trace and Ultra-Trace Chemistry Measurements of the WAIS Divide Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -76.84, "title": "Gas measurement from Higgins et al., 2015 - PNAS", "uid": "601014", "west": 159.02}, {"awards": "0538427 McConnell, Joseph", "bounds_geometry": ["POINT(-112.1115 -79.481)"], "date_created": "Thu, 23 Mar 2017 00:00:00 GMT", "description": "A state-of-the-art continuous ice core analytical system was used to analyze samples from 0 to ~130 m depth of the recently collected intermediate core WDC05Q from West Antarctica. Interpretation of these records and publication of findings is ongoing.", "east": -112.1115, "geometry": ["POINT(-112.1115 -79.481)"], "keywords": "Aerosol; Antarctica; Chemistry:fluid; Chemistry:Fluid; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; WAIS Divide; WAIS Divide Ice Core", "locations": "WAIS Divide; Antarctica", "north": -79.481, "nsf_funding_programs": null, "persons": "McConnell, Joseph", "project_titles": "Trace and Ultra-Trace Chemistry Measurements of the WAIS Divide Ice Core", "projects": [{"proj_uid": "p0000148", "repository": "USAP-DC", "title": "Trace and Ultra-Trace Chemistry Measurements of the WAIS Divide Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.481, "title": "WAIS Divide Ice-Core Aerosol Records from Intermediate Core WDC05Q", "uid": "601011", "west": -112.1115}, {"awards": "0538427 McConnell, Joseph", "bounds_geometry": ["POINT(-112.1115 -79.481)"], "date_created": "Thu, 23 Mar 2017 00:00:00 GMT", "description": "A state-of-the-art continuous ice core analytical system was used to analyze samples from the firn portion (0 to ~70 m depth) of the recently collected intermediate core WDC05A from West Antarctica. Interpretation of these records and publication of findings is ongoing.", "east": -112.1115, "geometry": ["POINT(-112.1115 -79.481)"], "keywords": "Aerosol; Antarctica; Chemistry:fluid; Chemistry:Fluid; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; WAIS Divide; WAIS Divide Ice Core", "locations": "Antarctica; WAIS Divide", "north": -79.481, "nsf_funding_programs": null, "persons": "McConnell, Joseph", "project_titles": "Trace and Ultra-Trace Chemistry Measurements of the WAIS Divide Ice Core", "projects": [{"proj_uid": "p0000148", "repository": "USAP-DC", "title": "Trace and Ultra-Trace Chemistry Measurements of the WAIS Divide Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.481, "title": "WAIS Divide Ice-Core Aerosol Records from Intermediate Core WDC05A", "uid": "601010", "west": -112.1115}, {"awards": "0538427 McConnell, Joseph", "bounds_geometry": ["POINT(-112.1115 -79.481)"], "date_created": "Thu, 23 Mar 2017 00:00:00 GMT", "description": "A state-of-the-art continuous ice core analytical system was used to analyze samples from ~1.5 to ~577 m depth in the recently collected WAIS Divide deep ice core from West Antarctica. Interpretation of these records and publication of findings is ongoing.", "east": -112.1115, "geometry": ["POINT(-112.1115 -79.481)"], "keywords": "Aerosol; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; WAIS Divide; WAIS Divide Ice Core", "locations": "WAIS Divide; Antarctica", "north": -79.481, "nsf_funding_programs": null, "persons": "McConnell, Joseph", "project_titles": "Trace and Ultra-Trace Chemistry Measurements of the WAIS Divide Ice Core", "projects": [{"proj_uid": "p0000148", "repository": "USAP-DC", "title": "Trace and Ultra-Trace Chemistry Measurements of the WAIS Divide Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.481, "title": "WAIS Divide Ice-Core Aerosol Records from 1.5 to 577 m", "uid": "601009", "west": -112.1115}, {"awards": "1142166 McConnell, Joseph", "bounds_geometry": ["POINT(-112.1115 -79.481)"], "date_created": "Wed, 22 Mar 2017 00:00:00 GMT", "description": "A state-of-the-art continuous ice core analytical system was used to analyze ~3 cm by ~3 cm longitudinal samples from ~1300 to ~3404 m depth in the recently collected WAIS Divide deep ice core from West Antarctica. Interpretation of these records and publication of findings is ongoing.", "east": -112.1115, "geometry": ["POINT(-112.1115 -79.481)"], "keywords": "Aerosol; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; WAIS Divide; WAIS Divide Ice Core", "locations": "WAIS Divide; Antarctica", "north": -79.481, "nsf_funding_programs": null, "persons": "McConnell, Joseph", "project_titles": "Collaborative Research: Investigating Upper Pleistocene Rapid Climate Change using Continuous, Ultra-High-Resolution Aerosol and Gas Measurements in the WAIS Divide Ice Core", "projects": [{"proj_uid": "p0000287", "repository": "USAP-DC", "title": "Collaborative Research: Investigating Upper Pleistocene Rapid Climate Change using Continuous, Ultra-High-Resolution Aerosol and Gas Measurements in the WAIS Divide Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.481, "title": "WAIS Divide Ice-Core Aerosol Records from 1300 to 3404 m", "uid": "601008", "west": -112.1115}, {"awards": "0538049 Steig, Eric", "bounds_geometry": ["POINT(-112.085 -79.5)"], "date_created": "Thu, 09 Mar 2017 00:00:00 GMT", "description": "This data set contain oxygen isotopes of sulfate and nitrate and nitrogen isotopes of nitrate from the WAIS Divide ice core from the surface to 577 m depth at varying resolution", "east": -112.085, "geometry": ["POINT(-112.085 -79.5)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Nitrate; Oxygen Isotope; Sulfate; WAIS Divide; WAIS Divide Ice Core", "locations": "WAIS Divide; Antarctica", "north": -79.5, "nsf_funding_programs": null, "persons": "Alexander, Becky; Steig, Eric J.", "project_titles": "Collaborative Research: Multiple-isotope Analysis of Nitrate and Sulfate in the West Antarctic Ice Sheet Divide Ice Core", "projects": [{"proj_uid": "p0000020", "repository": "USAP-DC", "title": "Collaborative Research: Multiple-isotope Analysis of Nitrate and Sulfate in the West Antarctic Ice Sheet Divide Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.5, "title": "WAIS Divide sulfate and nitrate isotopes", "uid": "601007", "west": -112.085}, {"awards": "0839075 Priscu, John", "bounds_geometry": ["POINT(-112.08648 -79.46763)"], "date_created": "Mon, 06 Mar 2017 00:00:00 GMT", "description": "This data set include depth (WDC06A-7 dating) and fluorescence intensity measurements for five fluorophore regions (A, C, M, B, and T) commonly found in natural organic matter. Data from 1300-1700m, 1700-2100m, and 2100-2700m correspond to the early Holocene, deglaciation period, and the Last Glacial Maximum.", "east": -112.08648, "geometry": ["POINT(-112.08648 -79.46763)"], "keywords": "Antarctica; Fluorescence Spectroscopy; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Physical Properties; WAIS Divide; WAIS Divide Ice Core", "locations": "Antarctica; WAIS Divide", "north": -79.46763, "nsf_funding_programs": null, "persons": "Priscu, John; D\u0027Andrilli, Juliana", "project_titles": "Collaborative Research: Integrated High Resolution Chemical and Biological Measurements on the Deep WAIS Divide Core", "projects": [{"proj_uid": "p0000273", "repository": "USAP-DC", "title": "Collaborative Research: Integrated High Resolution Chemical and Biological Measurements on the Deep WAIS Divide Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.46763, "title": "Fluorescence spectroscopy data from the West Antarctic Ice Sheet (WAIS) Divide ice core, WDC06A", "uid": "601006", "west": -112.08648}, {"awards": "1443260 Conway, Howard", "bounds_geometry": ["POLYGON((159.02 -76.67,159.057 -76.67,159.094 -76.67,159.131 -76.67,159.168 -76.67,159.205 -76.67,159.242 -76.67,159.279 -76.67,159.316 -76.67,159.353 -76.67,159.39 -76.67,159.39 -76.687,159.39 -76.704,159.39 -76.721,159.39 -76.738,159.39 -76.755,159.39 -76.772,159.39 -76.789,159.39 -76.806,159.39 -76.823,159.39 -76.84,159.353 -76.84,159.316 -76.84,159.279 -76.84,159.242 -76.84,159.205 -76.84,159.168 -76.84,159.131 -76.84,159.094 -76.84,159.057 -76.84,159.02 -76.84,159.02 -76.823,159.02 -76.806,159.02 -76.789,159.02 -76.772,159.02 -76.755,159.02 -76.738,159.02 -76.721,159.02 -76.704,159.02 -76.687,159.02 -76.67))"], "date_created": "Fri, 03 Mar 2017 00:00:00 GMT", "description": "Low (7MHz) and high (20-100MHz) frequency ground-based ice-penetrating radar profiles collected on the Allan Hills blue ice region between January 19 and January 31, 2016. Data include .MAT files with low-frequency content; .DZX metadata, .DZT traces, and .KML tracklines with high-frequency content; and .PDF files with maps and figures.", "east": 159.39, "geometry": ["POINT(159.205 -76.755)"], "keywords": "Allan Hills; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Navigation; Radar", "locations": "Allan Hills; Antarctica", "north": -76.67, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Conway, Howard", "project_titles": "Collaborative Research: Allan HILLs Englacial Site (AHILLES) Selection", "projects": [{"proj_uid": "p0000385", "repository": "USAP-DC", "title": "Collaborative Research: Allan HILLs Englacial Site (AHILLES) Selection"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.84, "title": "Ground-based ice-penetrating radar profiles collected on the Allan Hills blue ice region", "uid": "601005", "west": 159.02}, {"awards": "0944197 Waddington, Edwin", "bounds_geometry": ["POINT(-112.1115 -79.481)"], "date_created": "Tue, 21 Feb 2017 00:00:00 GMT", "description": "These data are the accumulation rate history for the WAIS Divide ice core in central West Antarctica. The data are in two parts: 1) the annual accumulation rates for the past ~31ka and 2) the firn gas-based accumulation rates from 31-67ka.", "east": -112.1115, "geometry": ["POINT(-112.1115 -79.481)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Snow Accumulation; WAIS Divide Ice Core", "locations": "Antarctica", "north": -79.481, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Earth Sciences", "persons": "Fudge, T. J.; Waddington, Edwin D.; Conway, Howard; Buizert, Christo", "project_titles": "Collaborative Research: Establishing the Chronology and Histories of Accumulation and Ice Dynamics for the WAIS Divide Core", "projects": [{"proj_uid": "p0000026", "repository": "USAP-DC", "title": "Collaborative Research: Establishing the Chronology and Histories of Accumulation and Ice Dynamics for the WAIS Divide Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.481, "title": "Accumulation Rates from the WAIS Divide Ice Core", "uid": "601004", "west": -112.1115}, {"awards": "1043761 Young, Duncan", "bounds_geometry": ["POLYGON((-156 -74.5,-151.4 -74.5,-146.8 -74.5,-142.2 -74.5,-137.6 -74.5,-133 -74.5,-128.4 -74.5,-123.8 -74.5,-119.2 -74.5,-114.6 -74.5,-110 -74.5,-110 -75.05,-110 -75.6,-110 -76.15,-110 -76.7,-110 -77.25,-110 -77.8,-110 -78.35,-110 -78.9,-110 -79.45,-110 -80,-114.6 -80,-119.2 -80,-123.8 -80,-128.4 -80,-133 -80,-137.6 -80,-142.2 -80,-146.8 -80,-151.4 -80,-156 -80,-156 -79.45,-156 -78.9,-156 -78.35,-156 -77.8,-156 -77.25,-156 -76.7,-156 -76.15,-156 -75.6,-156 -75.05,-156 -74.5))"], "date_created": "Mon, 20 Feb 2017 00:00:00 GMT", "description": "GIMBLE was proposed as the first systematic aerogeophysical investigation of the subglacial massif underlying central Marie Byrd Land. Aerogeophysically configured Baslers conducted 14 flights from Byrd Surface Camp and WAIS Divide Camp over two field seasons (January 2013 and December 2014). Airborne ice penetrating radar, gravity and magnetics were the primary datasets collected. Level 2 data represent geolocated geophysical properties (e.g ice thickness), derived from Level 1B measurements (e.g. radar echo delay). Dataset structures are based on those used for Operation Ice Bridge, and are line based data in ASCII space delimited .txt files, with a header delimited by leading \"#\" characters documenting column assignment and metadata. Georefering data is contained in .met files. GIMBLE.GMGEO2 contains line based data (in ASCII space delimited txt files) relating to magnetic anomaly. The raw data was obtained by a tail mounted Geometrics G-823A magnetometer. No heading correction, cross over correction, continuation or base correction have been applied. Data with significant geomagnetic activity (restricted to 07-Dec-2014 and 23-Dec-2014) were removed.", "east": -110.0, "geometry": ["POINT(-133 -77.25)"], "keywords": "Antarctica; Gimble; Glaciers/ice Sheet; Glaciers/Ice Sheet; Magnetic; Marie Byrd Land; Navigation; Potential Field; Solid Earth", "locations": "Marie Byrd Land; Antarctica", "north": -74.5, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Young, Duncan A.; Holt, John W.; Blankenship, Donald D.", "project_titles": "Geophysical Investigations of Marie Byrd Land Lithospheric Evolution (GIMBLE)", "projects": [{"proj_uid": "p0000435", "repository": "USAP-DC", "title": "Geophysical Investigations of Marie Byrd Land Lithospheric Evolution (GIMBLE)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.0, "title": "Magnetic anomaly data over central Marie Byrd Land, West Antarctica (GIMBLE.GMGEO2)", "uid": "601002", "west": -156.0}, {"awards": "1043761 Young, Duncan", "bounds_geometry": ["POLYGON((-156 -74.5,-151.4 -74.5,-146.8 -74.5,-142.2 -74.5,-137.6 -74.5,-133 -74.5,-128.4 -74.5,-123.8 -74.5,-119.2 -74.5,-114.6 -74.5,-110 -74.5,-110 -75.05,-110 -75.6,-110 -76.15,-110 -76.7,-110 -77.25,-110 -77.8,-110 -78.35,-110 -78.9,-110 -79.45,-110 -80,-114.6 -80,-119.2 -80,-123.8 -80,-128.4 -80,-133 -80,-137.6 -80,-142.2 -80,-146.8 -80,-151.4 -80,-156 -80,-156 -79.45,-156 -78.9,-156 -78.35,-156 -77.8,-156 -77.25,-156 -76.7,-156 -76.15,-156 -75.6,-156 -75.05,-156 -74.5))"], "date_created": "Mon, 20 Feb 2017 00:00:00 GMT", "description": "GIMBLE was proposed as the first systematic aerogeophysical investigation of the subglacial massif underlying central Marie Byrd Land. Aerogeophysically configured Baslers conducted 14 flights from Byrd Surface Camp and WAIS Divide Camp over two field seasons (January 2013 and December 2014). Airborne ice penetrating radar, gravity and magnetics were the primary datasets collected. Level 2 data represent geolocated geophysical properties (e.g ice thickness), derived from Level 1B measurements (e.g. radar echo delay). Dataset structures are based on those used for Operation Ice Bridge, and are line based data in ASCII space delimited .txt files, with a header delimited by leading \"#\" characters documenting column assignment and metadata. Georefering data is contained in .met files. GIMBLE.GGCMG2 contains line based data relating to gravity disturbance, processed from raw acceleration and position data by propriety software from Gravimetric Technologies and Novatel. The raw data was obtained a Canadian MicroGravity GT-1A gravimeter in ICP5, and a GT-2A gravimeter in ICP6. Data reduction was led by T. Richter.", "east": -110.0, "geometry": ["POINT(-133 -77.25)"], "keywords": "Antarctica; Gimble; Glaciers/ice Sheet; Glaciers/Ice Sheet; Gravity; Marie Byrd Land; Navigation; Potential Field; Solid Earth", "locations": "Marie Byrd Land; Antarctica", "north": -74.5, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Young, Duncan A.; Holt, John W.; Blankenship, Donald D.", "project_titles": "Geophysical Investigations of Marie Byrd Land Lithospheric Evolution (GIMBLE)", "projects": [{"proj_uid": "p0000435", "repository": "USAP-DC", "title": "Geophysical Investigations of Marie Byrd Land Lithospheric Evolution (GIMBLE)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.0, "title": "Gravity disturbance data over central Marie Byrd Land, West Antarctica (GIMBLE.GGCMG2)", "uid": "601003", "west": -156.0}, {"awards": "1043761 Young, Duncan", "bounds_geometry": ["POLYGON((-156 -74.5,-151.4 -74.5,-146.8 -74.5,-142.2 -74.5,-137.6 -74.5,-133 -74.5,-128.4 -74.5,-123.8 -74.5,-119.2 -74.5,-114.6 -74.5,-110 -74.5,-110 -75.05,-110 -75.6,-110 -76.15,-110 -76.7,-110 -77.25,-110 -77.8,-110 -78.35,-110 -78.9,-110 -79.45,-110 -80,-114.6 -80,-119.2 -80,-123.8 -80,-128.4 -80,-133 -80,-137.6 -80,-142.2 -80,-146.8 -80,-151.4 -80,-156 -80,-156 -79.45,-156 -78.9,-156 -78.35,-156 -77.8,-156 -77.25,-156 -76.7,-156 -76.15,-156 -75.6,-156 -75.05,-156 -74.5))"], "date_created": "Mon, 20 Feb 2017 00:00:00 GMT", "description": "GIMBLE was proposed as the first systematic aerogeophysical investigation of the subglacial massif underlying central Marie Byrd Land. Aerogeophysically configured Baslers conducted 14 flights from Byrd Surface Camp and WAIS Divide Camp over two field seasons (January 2013 and December 2014). Airborne ice penetrating radar, gravity and magnetics were the primary datasets collected. Level 2 data represent geolocated geophysical properties (e.g ice thickness), derived from Level 1B measurements (e.g. radar echo delay). Dataset structures are based on those used for Operation Ice Bridge, and are line based data in ASCII space delimited .txt files, with a header delimited by leading \"#\" characters documenting column assignment and metadata. Georefering data is contained in .met files. GIMBLE.GR2HI2 contains line based data (in ASCII space delimited txt files) relating to ice thickness, bed elevation and bed reflectivity, extracted from 1-D focused radargrams by semiautomatic interpretation. Data was acquired using HiCARS2 in ICP5, and MARFA in ICP6. Some data loss occurred in ICP6 (in particular F10,F11, and F14), limiting the lines that were focused. Data reduction was led by D. Young and S. Kempf.", "east": -110.0, "geometry": ["POINT(-133 -77.25)"], "keywords": "Airborne Radar; Antarctica; Gimble; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Thickness; Marie Byrd Land; Navigation; Radar", "locations": "Marie Byrd Land; Antarctica", "north": -74.5, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Young, Duncan A.; Holt, John W.; Blankenship, Donald D.", "project_titles": "Geophysical Investigations of Marie Byrd Land Lithospheric Evolution (GIMBLE)", "projects": [{"proj_uid": "p0000435", "repository": "USAP-DC", "title": "Geophysical Investigations of Marie Byrd Land Lithospheric Evolution (GIMBLE)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.0, "title": "Ice thickness and related data over central Marie Byrd Land, West Antarctica (GIMBLE.GR2HI2)", "uid": "601001", "west": -156.0}, {"awards": "1245580 Castro, M. Clara", "bounds_geometry": ["POINT(163.1833 -77.6767)", "POINT(162.3667 -77.7166)"], "date_created": "Mon, 30 Jan 2017 00:00:00 GMT", "description": null, "east": 163.1833, "geometry": ["POINT(163.1833 -77.6767)", "POINT(162.3667 -77.7166)"], "keywords": "Antarctica; Atmosphere; Chemistry:fluid; Chemistry:Fluid; Critical Zone; Geochemistry; Noble Gas; Paleoclimate; Ross Ice Shelf; Ross Sea; Taylor Valley", "locations": "Taylor Valley; Ross Sea; Antarctica; Ross Ice Shelf", "north": -77.6767, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Castro, M. Clara", "project_titles": "Developing a New Paleoclimate Proxy for Polar and Alpine Glacial Regions Based on Noble Gases", "projects": [{"proj_uid": "p0000388", "repository": "USAP-DC", "title": "Developing a New Paleoclimate Proxy for Polar and Alpine Glacial Regions Based on Noble Gases"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.7166, "title": "Developing a New Paleoclimate Proxy for Polar and Alpine Glacial Regions Based on Noble Gases", "uid": "600389", "west": 162.3667}, {"awards": "1142097 Bochdansky, Alexander", "bounds_geometry": ["POLYGON((163.90952 -67.00006,170.04898 -67.00006,176.18844 -67.00006,182.3279 -67.00006,188.46736 -67.00006,194.60682 -67.00006,200.74628 -67.00006,206.88574 -67.00006,213.0252 -67.00006,219.16466 -67.00006,225.30412 -67.00006,225.30412 -68.15911,225.30412 -69.31816,225.30412 -70.47721,225.30412 -71.63626,225.30412 -72.79531,225.30412 -73.95436,225.30412 -75.11341,225.30412 -76.27246,225.30412 -77.43151,225.30412 -78.59056,219.16466 -78.59056,213.0252 -78.59056,206.88574 -78.59056,200.74628 -78.59056,194.60682 -78.59056,188.46736 -78.59056,182.3279 -78.59056,176.18844 -78.59056,170.04898 -78.59056,163.90952 -78.59056,163.90952 -77.43151,163.90952 -76.27246,163.90952 -75.11341,163.90952 -73.95436,163.90952 -72.79531,163.90952 -71.63626,163.90952 -70.47721,163.90952 -69.31816,163.90952 -68.15911,163.90952 -67.00006))"], "date_created": "Mon, 23 Jan 2017 00:00:00 GMT", "description": null, "east": 225.30412, "geometry": ["POINT(-165.39318 -72.79531)"], "keywords": "Antarctica; Biota; Holographic Microscopy; Oceans; Photo/video; Photo/Video; Phytoplankton; Ross Sea; Sample/collection Description; Sample/Collection Description; Southern Ocean; Video Particle Profiler", "locations": "Ross Sea; Southern Ocean; Antarctica", "north": -67.00006, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Bochdansky, Alexander", "project_titles": "Collaborative research: TRacing the fate of Algal Carbon Export in the Ross Sea (TRACERS)", "projects": [{"proj_uid": "p0000307", "repository": "USAP-DC", "title": "Collaborative research: TRacing the fate of Algal Carbon Export in the Ross Sea (TRACERS)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.59056, "title": "Video Particle Profiler (VPP) and Digital Inline Holographic Microscopy (DIHM) data from cruise NBP1302", "uid": "600388", "west": 163.90952}, {"awards": "0947821 Ashworth, Allan", "bounds_geometry": ["POLYGON((166.58793 -85.11733,166.595533 -85.11733,166.603136 -85.11733,166.610739 -85.11733,166.618342 -85.11733,166.625945 -85.11733,166.633548 -85.11733,166.641151 -85.11733,166.648754 -85.11733,166.656357 -85.11733,166.66396 -85.11733,166.66396 -85.117836,166.66396 -85.118342,166.66396 -85.118848,166.66396 -85.119354,166.66396 -85.11986,166.66396 -85.120366,166.66396 -85.120872,166.66396 -85.121378,166.66396 -85.121884,166.66396 -85.12239,166.656357 -85.12239,166.648754 -85.12239,166.641151 -85.12239,166.633548 -85.12239,166.625945 -85.12239,166.618342 -85.12239,166.610739 -85.12239,166.603136 -85.12239,166.595533 -85.12239,166.58793 -85.12239,166.58793 -85.121884,166.58793 -85.121378,166.58793 -85.120872,166.58793 -85.120366,166.58793 -85.11986,166.58793 -85.119354,166.58793 -85.118848,166.58793 -85.118342,166.58793 -85.117836,166.58793 -85.11733))"], "date_created": "Tue, 17 Jan 2017 00:00:00 GMT", "description": null, "east": 166.66396, "geometry": ["POINT(166.625945 -85.11986)"], "keywords": "Antarctica; Beardmore Glacier; Biota; Fossil; GPS; Oliver Bluffs; Paleoclimate; Sample/collection Description; Sample/Collection Description; Seeds; Solid Earth; Transantarctic Mountains", "locations": "Antarctica; Beardmore Glacier; Oliver Bluffs; Transantarctic Mountains", "north": -85.11733, "nsf_funding_programs": null, "persons": "Ashworth, Allan", "project_titles": "Neogene Paleoecology of the Beardmore Glacier Region", "projects": [{"proj_uid": "p0000424", "repository": "USAP-DC", "title": "Neogene Paleoecology of the Beardmore Glacier Region"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -85.12239, "title": "Neogene Paleoecology of the Beardmore Glacier Region", "uid": "600387", "west": 166.58793}, {"awards": "0539232 Cuffey, Kurt", "bounds_geometry": ["POINT(-112.083 -79.467)"], "date_created": "Thu, 12 Jan 2017 00:00:00 GMT", "description": "This dataset contains the temperature reconstruction at the West Antarctic Ice Sheet (WAIS) Divide reported by Cuffey et al. (2016) in PNAS. Five files contain 1) the primary reconstruction (Eq. 2 of that publication), combining information from borehole temperatures, deuterium isotopic content of ice, and nitrogen-15 content of trapped diatomic nitrogen gas; 2) the primary reconstruction with higher-frequency content restored; 3) the lower limit of the primary reconstruction; 4) the upper limit of the primary reconstruction; and 5) and the primary reconstruction with added perturbations.", "east": -112.083, "geometry": ["POINT(-112.083 -79.467)"], "keywords": "Antarctica; Chemistry:fluid; Chemistry:Fluid; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Nitrogen; Paleoclimate; Temperature; WAIS Divide; WAIS Divide Ice Core", "locations": "WAIS Divide; Antarctica", "north": -79.467, "nsf_funding_programs": null, "persons": "Cuffey, Kurt M.", "project_titles": "Collaborative Research: Physical Properties of the WAIS Divide Deep Core", "projects": [{"proj_uid": "p0000038", "repository": "USAP-DC", "title": "Collaborative Research: Physical Properties of the WAIS Divide Deep Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.467, "title": "Temperature Reconstruction at the West Antarctic Ice Sheet Divide", "uid": "600377", "west": -112.083}, {"awards": "1043580 Reusch, David", "bounds_geometry": null, "date_created": "Tue, 10 Jan 2017 00:00:00 GMT", "description": null, "east": null, "geometry": null, "keywords": "Antarctica; Atmosphere; Atmospheric Model; Climate Model; Meteorology; Paleoclimate", "locations": "Antarctica", "north": null, "nsf_funding_programs": null, "persons": "Reusch, David", "project_titles": "Collaborative Research: Decoding \u0026 Predicting Antarctic Surface Melt Dynamics with Observations, Regional Atmospheric Modeling and GCMs", "projects": [{"proj_uid": "p0000447", "repository": "USAP-DC", "title": "Collaborative Research: Decoding \u0026 Predicting Antarctic Surface Melt Dynamics with Observations, Regional Atmospheric Modeling and GCMs"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Decoding \u0026 Predicting Antarctic Surface Melt Dynamics with Observations, Regional Atmospheric Modeling and GCMs", "uid": "600386", "west": null}, {"awards": "1141877 Aronson, Richard", "bounds_geometry": null, "date_created": "Tue, 10 Jan 2017 00:00:00 GMT", "description": "Elevated temperatures and ocean acidification are both threatening the Southern Ocean. The effects of these environmental changes are poorly understood, but preliminary data suggest that they are driving a biological invasion. Specifically, large populations of skeleton-crushing king crabs, Paralomis birsteini, have been detected off Marguerite Bay on the West Antarctic Peninsula. These crabs appear to be invading the continental shelf region where benthic communities have evolved in the absence of such top-predators. Thus, this invasion could result in a wholesale restructuring of the Antarctic benthic ecosystem. The proposed work seeks to document this invasion and better understand the effects of the introduction of P. birsteini on the ecology of this region. A towed underwater vehicle will be used to photographically image communities, and communities with and without P. birsteini will be compared quantitatively. Additionally, crabs will trapped and various aspects of their morphology and physiology will be assessed. This research is unique in that it will document a biological invasion in real-time and it will therefore enhance our general understandings of the drivers of invasion and resilience in biological communities. Results will be widely disseminated through publications as well as through presentations at national and international meetings. In addition, raw data will be made available through open-access databases. This project will support the research and training of undergraduate and graduate students and will foster an international collaboration with British scientists. Researchers on this project will participate in outreach thorough the development of K-12 curricular materials.", "east": null, "geometry": null, "keywords": "Antarctica; Antarctic Peninsula; Anvers Island; Benthos; Biota; Camera Tow; LMG1502; Marguerite Bay; NBP1002; NBP1310; Oceans; Photo/video; Photo/Video; Sample/collection Description; Sample/Collection Description; Southern Ocean", "locations": "Anvers Island; Southern Ocean; Antarctica; Antarctic Peninsula; Marguerite Bay", "north": null, "nsf_funding_programs": null, "persons": "Aronson, Richard", "project_titles": "Collaborative Research: Climate Change and Predatory Invasion of the Antarctic Benthos", "projects": [{"proj_uid": "p0000303", "repository": "USAP-DC", "title": "Collaborative Research: Climate Change and Predatory Invasion of the Antarctic Benthos"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Climate Change and Predatory Invasion of the Antarctic Benthos", "uid": "600385", "west": null}, {"awards": "0424589 Gogineni, S. Prasad", "bounds_geometry": ["POLYGON((163.884 -76.567,171.5583 -76.567,179.2326 -76.567,186.9069 -76.567,194.5812 -76.567,202.2555 -76.567,209.9298 -76.567,217.6041 -76.567,225.2784 -76.567,232.9527 -76.567,240.627 -76.567,240.627 -77.3847,240.627 -78.2024,240.627 -79.0201,240.627 -79.8378,240.627 -80.6555,240.627 -81.4732,240.627 -82.2909,240.627 -83.1086,240.627 -83.9263,240.627 -84.744,232.9527 -84.744,225.2784 -84.744,217.6041 -84.744,209.9298 -84.744,202.2555 -84.744,194.5812 -84.744,186.9069 -84.744,179.2326 -84.744,171.5583 -84.744,163.884 -84.744,163.884 -83.9263,163.884 -83.1086,163.884 -82.2909,163.884 -81.4732,163.884 -80.6555,163.884 -79.8378,163.884 -79.0201,163.884 -78.2024,163.884 -77.3847,163.884 -76.567))"], "date_created": "Wed, 28 Dec 2016 00:00:00 GMT", "description": "The Center for Remote Sensing of Ice Sheets (CReSIS) participated in an airborne radar survey using a BT-67 Basler aircraft over the Siple Coast of Antarctica. Five personnel deployed from November 29, 2013 to January 18, 2014 with USAP project# I-189-M. The major objective was to collect fine-resolution radar data with an ultra-wideband MCoRDS4 UHF/VHF radar depth sounder in conjunction with data from two microwave (Ku-band and Snow) radars and a Google Camera. This dataset includes reflection profiles for the three radars and ice surface and ice bottom picks for the radar depth sounder.", "east": 240.627, "geometry": ["POINT(-157.7445 -80.6555)"], "keywords": "Airborne Radar; Antarctica; Basler; Glaciers/ice Sheet; Glaciers/Ice Sheet; Kamb Ice Stream; Radar; Siple Coast; Whillans Ice Stream", "locations": "Whillans Ice Stream; Kamb Ice Stream; Siple Coast; Antarctica", "north": -76.567, "nsf_funding_programs": null, "persons": "Paden, John; Hale, Richard", "project_titles": "Center for Remote Sensing of Ice Sheets (CReSIS)", "projects": [{"proj_uid": "p0000102", "repository": "USAP-DC", "title": "Center for Remote Sensing of Ice Sheets (CReSIS)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -84.744, "title": "Airborne radar profiles of the Whillans, Bindschadler, and Kamb Ice Streams", "uid": "600384", "west": 163.884}, {"awards": "0636964 Welten, Kees", "bounds_geometry": ["POINT(-112.1115 -79.481)"], "date_created": "Wed, 14 Dec 2016 00:00:00 GMT", "description": null, "east": -112.1115, "geometry": ["POINT(-112.1115 -79.481)"], "keywords": "Antarctica; Cosmogenic Radionuclides; Geochronology; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Hydrothermal Vent; WAIS Divide; WAIS Divide Ice Core", "locations": "Antarctica; WAIS Divide", "north": -79.481, "nsf_funding_programs": null, "persons": "Welten, Kees", "project_titles": "Collaborative Research: Cosmogenic Radionuclides in the Deep WAIS Divide Core", "projects": [{"proj_uid": "p0000103", "repository": "USAP-DC", "title": "Collaborative Research: Cosmogenic Radionuclides in the Deep WAIS Divide Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.481, "title": "Cosmogenic Radionuclides in the WAIS Divide Ice Core", "uid": "600383", "west": -112.1115}, {"awards": "1043576 Crockett, Elizabeth", "bounds_geometry": null, "date_created": "Tue, 13 Dec 2016 00:00:00 GMT", "description": "Positioning and depth recordings were made using instruments aboard the ARSV Laurence M Gould.", "east": null, "geometry": null, "keywords": "Antarctica; Biota; Southern Ocean", "locations": "Antarctica; Southern Ocean", "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Crockett, Elizabeth", "project_titles": "Collaborative research: Redox Balance in Antarctic Notothenioid fishes: Do Icefishes have an Advantage?", "projects": [{"proj_uid": "p0000320", "repository": "USAP-DC", "title": "Collaborative research: Redox Balance in Antarctic Notothenioid fishes: Do Icefishes have an Advantage?"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Electronic fishing logs LM Gould 2015", "uid": "600390", "west": null}, {"awards": "1043781 O\u0027Brien, Kristin", "bounds_geometry": null, "date_created": "Tue, 06 Dec 2016 00:00:00 GMT", "description": null, "east": null, "geometry": null, "keywords": "Antarctica; Antarctic Peninsula; Biota; Fish; Sample/collection Description; Sample/Collection Description; Southern Ocean", "locations": "Southern Ocean; Antarctica; Antarctic Peninsula", "north": null, "nsf_funding_programs": null, "persons": "O\u0027Brien, Kristin", "project_titles": "Collaborative research: Redox Balance in Antarctic Notothenioid fishes: Do Icefishes have an Advantage?", "projects": [{"proj_uid": "p0000320", "repository": "USAP-DC", "title": "Collaborative research: Redox Balance in Antarctic Notothenioid fishes: Do Icefishes have an Advantage?"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Redox Balance in Antarctic Notothenioid Fishes", "uid": "600382", "west": null}, {"awards": "1142083 Kyle, Philip", "bounds_geometry": ["POINT(167.15334 -77.529724)"], "date_created": "Sat, 03 Dec 2016 00:00:00 GMT", "description": "Mt. Erebus is one of only a handful of volcanoes worldwide that have lava lakes with readily observable and nearly continuous Strombolian explosive activity. Erebus is also unique in having a permanent convecting lava lake of anorthoclase phonolite magma. Over the years significant infrastructure has been established at the summit of Mt. Erebus as part of the Mount Erebus Volcano Observatory (MEVO), which serves as a natural laboratory to study a wide range of volcanic processes, especially magma degassing associated with an open convecting magma conduit. The PI proposes to continue operating MEVO for a further five years. The fundamental fundamental research objectives are: to understand diffuse flank degassing by using distributed temperature sensing and gas measurements in ice caves, to understand conduit processes, and to examine the environmental impact of volcanic emissions from Erebus on atmospheric and cryospheric environments. To examine conduit processes the PI will make simultaneous observations with video records, thermal imaging, measurements of gas emission rates and gas compositions, seismic, and infrasound data.\n An important aspect of Erebus research is the education and training of students. Both graduate and undergraduate students will have the opportunity to work on MEVO data and deploy to the field site. In addition, this proposal will support a middle or high school science teacher for two field seasons. The PI will also continue working with various media organizations and filmmakers.\nThis dataset contains video taken from a series of cameras that were installed at Shackleton\u0027s Cairn (-77.525337, 167.157509) looking into the lava lake. This dataset contains all such video taken between 2005 and 2011. Camera downlink depended on power at a relay station at the Cones site. The camera was operational during G-081 field seasons and often for a period of weeks or months thereafter.", "east": 167.15334, "geometry": ["POINT(167.15334 -77.529724)"], "keywords": "Antarctica; Cable Observatory; Geology/Geophysics - Other; Infrared Imagery; Intracontinental Magmatism; IntraContinental Magmatism; MEVO; Mount Erebus; Photo/video; Photo/Video; Ross Island; Solid Earth; Thermal Camera; Volcano", "locations": "Mount Erebus; Ross Island; Antarctica", "north": -77.529724, "nsf_funding_programs": null, "persons": "Oppenheimer, Clive; Kyle, Philip", "project_titles": "Mount Erebus Volcano Observatory: Operations, Science and Outreach (MEVO-OSO)", "projects": [{"proj_uid": "p0000383", "repository": "USAP-DC", "title": "Mount Erebus Volcano Observatory: Operations, Science and Outreach (MEVO-OSO)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "MEVO", "south": -77.529724, "title": "Mount Erebus Volcano Observatory: Operations, Science and Outreach (MEVO-OSO)", "uid": "600381", "west": 167.15334}, {"awards": "1141411 Baker, Ian", "bounds_geometry": null, "date_created": "Tue, 22 Nov 2016 00:00:00 GMT", "description": null, "east": null, "geometry": null, "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice; Physical Properties; Snow", "locations": "Antarctica", "north": null, "nsf_funding_programs": null, "persons": "Baker, Ian", "project_titles": "The Effects of Soluble Impurities on the Flow and Fabric of Polycrystalline Ice", "projects": [{"proj_uid": "p0010133", "repository": "USAP-DC", "title": "The Effects of Soluble Impurities on the Flow and Fabric of Polycrystalline Ice"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "The Effects of Soluble Impurities on the Flow and Fabric of Polycrystalline Ice", "uid": "600380", "west": null}, {"awards": "1043554 Willenbring, Jane", "bounds_geometry": ["POINT(161.5 -77.5)"], "date_created": "Wed, 09 Nov 2016 00:00:00 GMT", "description": "The PIs propose to address the question of whether ice surface melting zones developed at high elevations during warm climatic phases in the Transantarctic Mountains. Evidence from sediment cores drilled by the ANDRILL program indicates that open water in the Ross Sea could have been a source of warmth during Pliocene and Pleistocene. The question is whether marine warmth penetrated inland to the ice sheet margins. The glacial record may be ill suited to answer this question, as cold-based glaciers may respond too slowly to register brief warmth. Questions also surround possible orbital controls on regional climate and ice sheet margins. Northern Hemisphere insolation at obliquity and precession timescales is thought to control Antarctic climate through oceanic or atmospheric connections, but new thinking suggests that the duration of Southern Hemisphere summer may be more important. The PIs propose to use high elevation alluvial deposits in the Transantarctic Mountains as a proxy for inland warmth. These relatively young fans, channels, and debris flow levees stand out as visible evidence for the presence of melt water in an otherwise ancient, frozen landscape. Based on initial analyses of an alluvial fan in the Olympus Range, these deposits are sensitive recorders of rare melt events that occur at orbital timescales. For their study they will 1) map alluvial deposits using aerial photography, satellite imagery and GPS assisted field surveys to establish water sources and to quantify parameters effecting melt water production, 2) date stratigraphic sequences within these deposits using OSL, cosmogenic nuclide, and interbedded volcanic ash chronologies, 3) use paired nuclide analyses to estimate exposure and burial times, and rates of deposition and erosion, and 4) use micro and regional scale climate modeling to estimate paleoenvironmental conditions associated with melt events.\nThis study will produce a record of inland melting from sites adjacent to ice sheet margins to help determine controls on regional climate along margins of the East Antarctic Ice Sheet to aid ice sheet and sea level modeling studies. The proposal will support several graduate and undergraduates. A PhD student will be supported on existing funding. The PIs will work with multiple K-12 schools to conduct interviews and webcasts from Antarctica and they will make follow up visits to classrooms after the field season is complete.", "east": 161.5, "geometry": ["POINT(161.5 -77.5)"], "keywords": "Antarctica; Chemistry:rock; Chemistry:Rock; Cosmogenic Radionuclides; Geochronology; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Isotope; Sample/collection Description; Sample/Collection Description; Transantarctic Mountains", "locations": "Transantarctic Mountains; Antarctica", "north": -77.5, "nsf_funding_programs": null, "persons": "Willenbring, Jane", "project_titles": "Collaborative Research: Activation of high-elevation alluvial fans in the Transantarctic Mountains - a proxy for Plio-Pleistocene warmth along East Antarctic ice margins", "projects": [{"proj_uid": "p0000429", "repository": "USAP-DC", "title": "Collaborative Research: Activation of high-elevation alluvial fans in the Transantarctic Mountains - a proxy for Plio-Pleistocene warmth along East Antarctic ice margins"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.5, "title": "Activation of high-elevation alluvial fans in the Transantarctic Mountains - a proxy for Plio-Pleistocene warmth along East Antarctic ice margins", "uid": "600379", "west": 161.5}, {"awards": "1443444 Yuan, Xiaojun", "bounds_geometry": ["POLYGON((65.4503 -63.5143,67.2063 -63.5143,68.9623 -63.5143,70.7183 -63.5143,72.4743 -63.5143,74.2303 -63.5143,75.9863 -63.5143,77.7423 -63.5143,79.4983 -63.5143,81.2543 -63.5143,83.0103 -63.5143,83.0103 -64.09423,83.0103 -64.67416,83.0103 -65.25409,83.0103 -65.83402,83.0103 -66.41395,83.0103 -66.99388,83.0103 -67.57381,83.0103 -68.15374,83.0103 -68.73367,83.0103 -69.3136,81.2543 -69.3136,79.4983 -69.3136,77.7423 -69.3136,75.9863 -69.3136,74.2303 -69.3136,72.4743 -69.3136,70.7183 -69.3136,68.9623 -69.3136,67.2063 -69.3136,65.4503 -69.3136,65.4503 -68.73367,65.4503 -68.15374,65.4503 -67.57381,65.4503 -66.99388,65.4503 -66.41395,65.4503 -65.83402,65.4503 -65.25409,65.4503 -64.67416,65.4503 -64.09423,65.4503 -63.5143))"], "date_created": "Mon, 02 May 2016 00:00:00 GMT", "description": "This dataset contains inventories and location maps for CTD data acquired by the icebreaker R/V Xue Long in the Prydz Bay- Amery Ice Shelf region. A total of 68 stations were acquired in February 2015 and 24 stations in March 2017, as part of a joint US/China project to study Antarctic Bottom Water (AABW) formation.", "east": 83.0103, "geometry": ["POINT(74.2303 -66.41395)"], "keywords": "CTD Data; Oceans; Physical Oceanography; Prydz Bay; Sample/collection Description; Sample/Collection Description; Southern Ocean; Xue Long", "locations": "Southern Ocean; Prydz Bay", "north": -63.5143, "nsf_funding_programs": null, "persons": "Yuan, Xiaojun", "project_titles": "Collaborative Research: Contribution of Prydz Bay Shelf Water to Antarctic Bottom Water Formation", "projects": [{"proj_uid": "p0000295", "repository": "USAP-DC", "title": "Collaborative Research: Contribution of Prydz Bay Shelf Water to Antarctic Bottom Water Formation"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -69.3136, "title": "CTD Data Acquired by R/V Xue Long in the Prydz Bay- Amery Ice Shelf Region, 2015-2017", "uid": "600174", "west": 65.4503}, {"awards": "0539578 Alley, Richard", "bounds_geometry": ["POINT(-112.085 -79.467)"], "date_created": "Mon, 07 Mar 2016 00:00:00 GMT", "description": "This data set consists of a comprehensive, frame-stitched low\u2010resolution set of digital images of vertical thin sections of the main core (WDC 06A) from WAIS Divide.", "east": -112.085, "geometry": ["POINT(-112.085 -79.467)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Photo/video; Photo/Video; Thin Sections; WAIS Divide; WAIS Divide Ice Core", "locations": "Antarctica; WAIS Divide", "north": -79.467, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Cravens, Eric D.", "project_titles": "Collaborative Research: Physical Properties of the WAIS Divide Deep Core", "projects": [{"proj_uid": "p0000038", "repository": "USAP-DC", "title": "Collaborative Research: Physical Properties of the WAIS Divide Deep Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.467, "title": "WAIS Divide Ice Core Vertical Thin Section Low-resolution Digital Imagery", "uid": "609654", "west": -112.085}, {"awards": "0539578 Alley, Richard", "bounds_geometry": ["POINT(-112.085 -79.467)"], "date_created": "Wed, 02 Mar 2016 00:00:00 GMT", "description": "The data set comprises the mean grain sizes at\u00a0the sampled depths derived from vertical thin sections\u00a0and reflects the final WDC 06A timescale.", "east": -112.085, "geometry": ["POINT(-112.085 -79.467)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Grain Size; Ice Core Records; WAIS Divide; WAIS Divide Ice Core", "locations": "Antarctica; WAIS Divide", "north": -79.467, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Fitzpatrick, Joan; Cravens, Eric D.", "project_titles": "Collaborative Research: Physical Properties of the WAIS Divide Deep Core", "projects": [{"proj_uid": "p0000038", "repository": "USAP-DC", "title": "Collaborative Research: Physical Properties of the WAIS Divide Deep Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.467, "title": "WDC 06A Mean Grain Size Data", "uid": "609656", "west": -112.085}, {"awards": "0539578 Alley, Richard", "bounds_geometry": ["POINT(-112.085 -79.467)"], "date_created": "Thu, 25 Feb 2016 00:00:00 GMT", "description": "This data set contains the complete grain-size data for all analyses conducted on the vertical thin sections of the WAIS Divide Ice Core WDC06A. Complete grain-size distributions are provided here in order to address the shortcomings inherent in using only the mean values.", "east": -112.085, "geometry": ["POINT(-112.085 -79.467)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Grain Size; Ice Core Records; WAIS Divide; WAIS Divide Ice Core", "locations": "WAIS Divide; Antarctica", "north": -79.467, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Fitzpatrick, Joan; Cravens, Eric D.", "project_titles": "Collaborative Research: Physical Properties of the WAIS Divide Deep Core", "projects": [{"proj_uid": "p0000038", "repository": "USAP-DC", "title": "Collaborative Research: Physical Properties of the WAIS Divide Deep Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.467, "title": "Grain Size Full Population Dataset from WDC06A Core", "uid": "609655", "west": -112.085}, {"awards": "1043649 Hock, Regine", "bounds_geometry": ["POINT(-61 -62.75)", "POINT(-57.5 -61.75)"], "date_created": "Wed, 17 Feb 2016 00:00:00 GMT", "description": "The data contain the time series totals of SAR derived detrended surface velocities from Livingston Island, as well as GeoTiff files generated from intensity tracking of Synthetic Aperture Radar (SAR) imagery. The images include average annual velocity and ice thickness of King George Island, and average annual velocity, ice thickness, and a digital elevation model of Livingston Island.", "east": -57.5, "geometry": ["POINT(-61 -62.75)", "POINT(-57.5 -61.75)"], "keywords": "Antarctica; Antarctic Peninsula; Digital Elevation Model; Geology/Geophysics - Other; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Thickness; Ice Velocity", "locations": "Antarctic Peninsula; Antarctica", "north": -61.75, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Osmanoglu, Batuhan; Hock, Regine", "project_titles": "Contribution of Western Antarctic Peninsula glaciers to sea level rise: Separation of the dynamic and climatic components", "projects": [{"proj_uid": "p0000054", "repository": "USAP-DC", "title": "Contribution of Western Antarctic Peninsula glaciers to sea level rise: Separation of the dynamic and climatic components"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -62.75, "title": "King George and Livingston Islands: Velocities and Digital Elevation Model", "uid": "609667", "west": -61.0}, {"awards": "0838817 Kyle, Philip", "bounds_geometry": null, "date_created": "Fri, 01 Jan 2016 00:00:00 GMT", "description": "This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). Mount Erebus is Antarctica\u0027s most active volcano that has been in a persistent state of activity for at least the last 35 years. It has a unique geochemistry among the Earth\u0027s active volcanoes and is also unique in hosting a persistent convecting lake(s) of anorthclase phonolite magma in its summit crater. The relative simplicity of the magmatic system, consistency of activity, and accessibility of close-range observation make Erebus attractive as a target for extensive studies. Although the Erebus\u0027 seismicity and eruptive activity and processes are becoming increasingly well understood over years of research, there is a near total lack of understanding its deeper magmatic system. The primary goal of this proposal is to continue supporting the Mt. Erebus Volcano Observatory (MEVO III) improving our current understanding of the Erebus eruptive and non-eruptive magmatic system using an integrated approach from geophysical, geochemical and remote sensing observations. This goal can be grouped into the following fundamental research objectives: (a) to sustain year-round surveillance of on-going volcanic activity primarily using geophysical observatories; (b) to understand processes within the convecting conduit which feeds the persistent lava lakes; and (c) to understand the impact of Erebus eruptive activity upon the Antarctic environment. Continued reliance on students provides a broader impact to this proposed research and firmly grounds this effort in its educational mission.", "east": null, "geometry": null, "keywords": "Antarctica; Cable Observatory; Intracontinental Magmatism; IntraContinental Magmatism; MEVO; Mount Erebus; Photo/video; Photo/Video; Ross Sea; Solid Earth; Volcano", "locations": "Mount Erebus; Antarctica; Ross Sea", "north": null, "nsf_funding_programs": null, "persons": "Kyle, Philip", "project_titles": "Mount Erebus Volcano Observatory III (MEVO III): Conduit Processes and Surveillance", "projects": [{"proj_uid": "p0000488", "repository": "USAP-DC", "title": "Mount Erebus Volcano Observatory III (MEVO III): Conduit Processes and Surveillance"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "MEVO", "south": null, "title": "Mount Erebus Volcano Observatory III (MEVO III): Conduit Processes and Surveillance", "uid": "600153", "west": null}, {"awards": "1141877 Aronson, Richard", "bounds_geometry": ["POLYGON((-111.18 -49.98,-105.429 -49.98,-99.678 -49.98,-93.927 -49.98,-88.176 -49.98,-82.425 -49.98,-76.674 -49.98,-70.923 -49.98,-65.172 -49.98,-59.421 -49.98,-53.67 -49.98,-53.67 -52.826,-53.67 -55.672,-53.67 -58.518,-53.67 -61.364,-53.67 -64.21,-53.67 -67.056,-53.67 -69.902,-53.67 -72.748,-53.67 -75.594,-53.67 -78.44,-59.421 -78.44,-65.172 -78.44,-70.923 -78.44,-76.674 -78.44,-82.425 -78.44,-88.176 -78.44,-93.927 -78.44,-99.678 -78.44,-105.429 -78.44,-111.18 -78.44,-111.18 -75.594,-111.18 -72.748,-111.18 -69.902,-111.18 -67.056,-111.18 -64.21,-111.18 -61.364,-111.18 -58.518,-111.18 -55.672,-111.18 -52.826,-111.18 -49.98))"], "date_created": "Fri, 01 Jan 2016 00:00:00 GMT", "description": "Elevated temperatures and ocean acidification are both threatening the Southern Ocean. The effects of these environmental changes are poorly understood, but preliminary data suggest that they are driving a biological invasion. Specifically, large populations of skeleton-crushing king crabs, Paralomis birsteini, have been detected off Marguerite Bay on the West Antarctic Peninsula. These crabs appear to be invading the continental shelf region where benthic communities have evolved in the absence of such top-predators. Thus, this invasion could result in a wholesale restructuring of the Antarctic benthic ecosystem. The proposed work seeks to document this invasion and better understand the effects of the introduction of P. birsteini on the ecology of this region. A towed underwater vehicle will be used to photographically image communities, and communities with and without P. birsteini will be compared quantitatively. Additionally, crabs will trapped and various aspects of their morphology and physiology will be assessed. This research is unique in that it will document a biological invasion in real-time and it will therefore enhance our general understandings of the drivers of invasion and resilience in biological communities. Results will be widely disseminated through publications as well as through presentations at national and international meetings. In addition, raw data will be made available through open-access databases. This project will support the research and training of undergraduate and graduate students and will foster an international collaboration with British scientists. Researchers on this project will participate in outreach thorough the development of K-12 curricular materials.", "east": -53.67, "geometry": ["POINT(-82.425 -64.21)"], "keywords": "Antarctica; Antarctic Peninsula; Anvers Island; Benthos; Biota; Camera Tow; LMG1502; Marguerite Bay; NBP1002; NBP1310; Oceans; Photo/video; Photo/Video; Sample/collection Description; Sample/Collection Description; Southern Ocean", "locations": "Antarctica; Antarctic Peninsula; Marguerite Bay; Anvers Island; Southern Ocean", "north": -49.98, "nsf_funding_programs": null, "persons": "Aronson, Richard", "project_titles": "Collaborative Research: Climate Change and Predatory Invasion of the Antarctic Benthos", "projects": [{"proj_uid": "p0000303", "repository": "USAP-DC", "title": "Collaborative Research: Climate Change and Predatory Invasion of the Antarctic Benthos"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.44, "title": "Climate Change and Predatory Invasion of the Antarctic Benthos", "uid": "600171", "west": -111.18}, {"awards": "0839059 Powell, Ross", "bounds_geometry": ["POLYGON((-168.7 -82.3,-168.69 -82.3,-168.68 -82.3,-168.67 -82.3,-168.66 -82.3,-168.65 -82.3,-168.64 -82.3,-168.63 -82.3,-168.62 -82.3,-168.61 -82.3,-168.6 -82.3,-168.6 -82.31,-168.6 -82.32,-168.6 -82.33,-168.6 -82.34,-168.6 -82.35,-168.6 -82.36,-168.6 -82.37,-168.6 -82.38,-168.6 -82.39,-168.6 -82.4,-168.61 -82.4,-168.62 -82.4,-168.63 -82.4,-168.64 -82.4,-168.65 -82.4,-168.66 -82.4,-168.67 -82.4,-168.68 -82.4,-168.69 -82.4,-168.7 -82.4,-168.7 -82.39,-168.7 -82.38,-168.7 -82.37,-168.7 -82.36,-168.7 -82.35,-168.7 -82.34,-168.7 -82.33,-168.7 -82.32,-168.7 -82.31,-168.7 -82.3))"], "date_created": "Fri, 01 Jan 2016 00:00:00 GMT", "description": "The LISSARD project (Lake and Ice Stream Subglacial Access Research Drilling) is one of three research components of the WISSARD integrative initiative (Whillans Ice Stream Subglacial Access Research Drilling) that is being funded by the Antarctic Integrated System Science Program of NSF\u0027s Office of Polar Programs, Antarctic Division. The overarching scientific objective of WISSARD is to assess the role of water beneath a West Antarctic ice stream in interlinked glaciological, geological, microbiological, geochemical, and oceanographic systems. The LISSARD component of WISSARD focuses on the role of active subglacial lakes in determining how fast the West Antarctic ice sheet loses mass to the global ocean and influences global sea level changes. The importance of Antarctic subglacial lakes has only been recently recognized, and the lakes have been identified as high priority targets for scientific investigations because of their unknown contributions to ice sheet stability under future global warming scenarios. LISSARD has several primary science goals: A) To provide an observational basis for improving treatments of subglacial hydrological and mechanical processes in models of ice sheet mass balance and stability; B) To reconstruct the past history of ice stream stability by analyzing archives of past basal water and ice flow variability contained in subglacial sediments, porewater, lake water, and basal accreted ice; C) To provide background understanding of subglacial lake environments to benefit RAGES and GBASE (the other two components of the WISSARD project); and D) To synthesize data and concepts developed as part of this project to determine whether subglacial lakes play an important role in (de)stabilizing Antarctic ice sheets. We propose an unprecedented synthesis of approaches to studying ice sheet processes, including: (1) satellite remote sensing, (2) surface geophysics, (3) borehole observations and measurements and, (4) basal and subglacial sampling.\nThe latest report of the Intergovernmental Panel on Climate Change recognized that the greatest uncertainties in assessing future global sea-level change stem from a poor understanding of ice sheet dynamics and ice sheet vulnerability to oceanic and atmospheric warming. Disintegration of the WAIS (West Antarctic Ice Sheet) alone would contribute 3-5 m to global sea-level rise, making WAIS a focus of scientific concern due to its potential susceptibility to internal or ocean-driven instability. The overall WISSARD project will test the overarching hypothesis that active water drainage connects various subglacial environments and exerts major control on ice sheet flow, geochemistry, metabolic and phylogenetic diversity, and biogeochemical transformations.\nSocietal Relevance: Global warming, melting of ice sheets and consequential sea-level rise are of high societal relevance. Science Resource Development: After a 9-year hiatus WISSARD will provide the US-science community with a renewed capability to access and study sub-ice sheet environments. Developing this technological infrastructure will benefit the broader science community and assets will be accessible for future use through the NSF-OPP drilling contractor. Furthermore, these projects will pioneer an approach implementing recommendations from the National Research Council committee on Principles of Environmental Stewardship for the Exploration and Study of Subglacial Environments (2007). Education and Outreach (E/O): These activities are grouped into four categories: i) increasing student participation in polar research by fully integrating them in our research programs; ii) introducing new investigators to the polar sciences by incorporating promising young investigators in our programs, iii) promotion of K-12 teaching and learning programs by incorporating various teachers and NSTA programs, and iv) reaching a larger public audience through such venues as popular science magazines, museum based activities and videography and documentary films. In summary, WISSARD will promote scientific exploration of Antarctica by conveying to the public the excitement of accessing and studying what may be some of the last unexplored aquatic environments on Earth, and which represent a potential analogue for extraterrestrial life habitats on Europa and Mars.", "east": -168.6, "geometry": ["POINT(-168.65 -82.35)"], "keywords": "Antarctica; Biota; Diatom; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Lake Whillans; Paleoclimate; Ross Sea; Southern Ocean; Subglacial Lake; WISSARD", "locations": "Lake Whillans; Southern Ocean; Antarctica; Ross Sea", "north": -82.3, "nsf_funding_programs": null, "persons": "Powell, Ross", "project_titles": "Collaborative Research: Integrative Study of Marine Ice Sheet Stability \u0026 Subglacial Life Habitats in W Antarctica - Lake \u0026 Ice Stream Subglacial Access Research Drilling (LISSARD)", "projects": [{"proj_uid": "p0000105", "repository": "USAP-DC", "title": "Collaborative Research: Integrative Study of Marine Ice Sheet Stability \u0026 Subglacial Life Habitats in W Antarctica - Lake \u0026 Ice Stream Subglacial Access Research Drilling (LISSARD)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -82.4, "title": "Integrative Study of Marine Ice Sheet Stability and Subglacial Life Habitats in W Antarctica - Lake and Ice Stream Subglacial Access Research Drilling (LISSARD)", "uid": "600154", "west": -168.7}, {"awards": "0632399 Jefferies, Stuart", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Fri, 01 Jan 2016 00:00:00 GMT", "description": "The ultimate goal of this project is to determine the structure and dynamics of the Sun\u0027s atmosphere, assess the role of MHD waves in heating the chromosphere/corona and driving the solar wind, and better understand how the Sun\u0027s atmosphere couples to the solar interior. As the solar atmosphere is \u0027home\u0027 to many of the solar phenomena that can have a direct impact on the biosphere, including flares, coronal mass ejections, and the solar wind, the broader impact of such studies is that they will lead to an improved understanding of the Sun-Earth connection. \nUnder the current award we have developed a suite of instruments that can simultaneously image the line-of-sight Doppler velocity and longitudinal magnetic field at four heights in the solar atmosphere at high temporal cadence. The instruments use magneto-optical filters (see Cacciani, Moretti and Rodgers, Solar Physics 174, p.115, 2004) tuned to the solar absorption lines at 422 nm (Ca I), 589 nm (Na D2), 770 nm (K) and 1083 nm (He). These lines sample the solar atmosphere from the mid-photosphere to the high-chromosphere. \nA proof-of-concept run was made in the Austral summer of 2007/2008 using the Na and K versions of the instruments. Here we recorded over 40 hours of full-disk, intensity images of the Sun in the red and blue wings of the Na and K Fraunhofer lines, in both right- and left-circularly polarized light. The images were obtained at a rate of one every five seconds with a nominal spatial resolution of 4 arc-seconds. The run started at 09:44 UT on February 2, 2008 and ended at 03:30 UT on February 4, 2008.\nData Quality Assessment:\nThe temperature controls of the instrument housings were unable to fully compensate for the harse Antartic winds encountered during the observing run. This led to large (~15 C) temperature swings which adversely affected the instruments (and thus data quality) in two ways: 1) Crystals of Na and K were deposited on the magneto-optical filter windows leading to \"hot spots\" in the images. These \"hot spots\" come and go with time as the temperature changes. 2) The changing temperature caused the optical rails to contract and expand causing the final images to go in- and out-of-focus, thus reducing the resolution to greater than 4 arc-seconds. Both these effect are worse in the K data.\nDespite these problems, the intensity images can be combined to provide magnetic images that show a very high sensitivity (\u003c 5 Gauss in a 5 second integration).\nData Description:\nThe raw data are stored as a series of 1024x1024x4 FITS images. The format is: blue image (left circulary polarized light), blue image (right circularly polarized light), red image (left circulary polarized light), red image (right circularly polarized light).\nThe naming convention for the images is: Type_Instrument_Day_hour_minutes_seconds\nwhere Type is I (intensity), F (flatfield), D (dark)\n Instrument is 0 (Na), 1 (K)\n Day is the day number from the beginning of the year where January 1 is day 0\nFor example, I_0_32_12_34_40.fits is an intensity image taken with the Na instrument at 12:34.40 UT on February 2, 2008.\nNotes: \n1) The flatfield images were acquired by moving a diffuser in front of the Sun during the integration. The resulting images therefore have to be corrected for residual low-spatial frequencies due to the non-flat nature of the light source.\n2) Each FITS file header contains a variety of information on the observation, e.g.,\nF_CNTO\t: number of summed frames in each 5 second integration (*)\nFPS\t\t: Camera frame rate (Frames Per Second)\nFLIP\t: Rate at which the half-wave rotator (magnetic switch) was switched\nINT_PER\t: Integration time (in seconds)\nMOF\t\t: Temperature of magneto-optical filter cell\nWS\t\t: Temperature of wing selector cell\nTEMP_0\t: Temperature of camera 0\nTEMP_1\t: Temperature of camera 1\nTEMP_2\t: Temperature inside instrument (location 1)\nTEMP_3\t: Temperature of narrowband filter\nTEMP_5\t: Temperature of magnets surrounding MOF cell\nTEMP_6\t: Temperature inside instrument (location 2)\nTEMP_7\t: Temperature of housing for magnetic switch\n(*) This is the frame count for the camera. The number of frames in each image for the two different polarization states, is half this number.\nThe measured temperatures are only coarse measurements.\n3) Due to reflection in the final polarizing beam splitter (which separates the \"red\" and \"blue\" signals into the two cameras), the camera 1 data need to \"reversed\" along the x-axis (i.e. listed as [1024:1] instead of [1:1024])\n4) Line-of-sight velocity and magnetic field images are generated from the observed intensity images. Doppler images as (red-blue)/(red+blue), magnetic images as the difference between the Doppler images\nfor right- and left-circularly polarized light.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Cosmos; Satellite Remote Sensing; Sun", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": null, "persons": "Jefferies, Stuart M.", "project_titles": "Tomographic Imaging of the Velocity and Magnetic Fields in the Sun\u0027s Atmosphere", "projects": [{"proj_uid": "p0000526", "repository": "USAP-DC", "title": "Tomographic Imaging of the Velocity and Magnetic Fields in the Sun\u0027s Atmosphere"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Tomographic Imaging of the Velocity and Magnetic Fields in the Sun\u0027s Atmosphere", "uid": "600152", "west": -180.0}, {"awards": "1043167 White, James", "bounds_geometry": ["POINT(-112.08 -79.47)"], "date_created": "Fri, 01 Jan 2016 00:00:00 GMT", "description": "This award supports a project to contribute one of the cornerstone analyses, stable isotopes of ice (Delta-D, Delta-O18) to the ongoing West Antarctic Ice Sheet Divide (WAIS) deep ice core. The WAIS Divide drilling project, a multi-institution project to obtain a continuous high resolution ice core record from central West Antarctica, reached a depth of 2560 m in early 2010; it is expected to take one or two more field seasons to reach the ice sheet bed (~3300 m), plus an additional four seasons for borehole logging and other activities including proposed replicate coring. The current proposal requests support to complete analyses on the WAIS Divide core to the base, where the age will be ~100,000 years or more. These analyses will form the basis for the investigation of a number of outstanding questions in climate and glaciology during the last glacial period, focused on the dynamics of the West Antarctic Ice Sheet and the relationship of West Antarctic climate to that of the Northern polar regions, the tropical Pacific, and the rest of the globe, on time scales ranging from years to tens of thousands of years. One new aspect of this work is the growing expertise at the University of Washington in climate modeling with isotope-tracer-enabled general circulation models, which will aid in the interpretation of the data. Another major new aspect is the completion and use of a high-resolution, semi-automated sampling system at the University of Colorado, which will permit the continuous analysis of isotope ratios via laser spectroscopy, at an effective resolution of ~2 cm or less, providing inter-annual time resolution for most of the core. Because continuous flow analyses of stable ice isotopes is a relatively new measurement, we will complement them with parallel measurements, every ~10-20 m, using traditional discrete sampling and analysis by mass spectrometry at the University of Washington. The intellectual merit and the overarching goal of the work are to see Inland WAIS become the reference ice isotope record for West Antarctica. The broader impacts of the work are that the data generated in this project pertain directly to policy-relevant and immediate questions of the stability of the West Antarctic ice sheet, and thus past and future changes in sea level, as well as the nature of climate change in the high southern latitudes. The project will also contribute to the development of modern isotope analysis techniques using laser spectroscopy, with applications well beyond ice cores. The project will involve a graduate student and postdoc who will work with both P.I.s, and spend time at both institutions. Data will be made available rapidly through the Antarctic Glaciological Data Center, for use by other researchers and the public.", "east": -112.08, "geometry": ["POINT(-112.08 -79.47)"], "keywords": "Antarctica; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Isotope; Paleoclimate; Snow Accumulation; WAIS Divide; WAIS Divide Ice Core", "locations": "WAIS Divide; Antarctica", "north": -79.47, "nsf_funding_programs": null, "persons": "White, James; Morris, Valerie; Vaughn, Bruce; Jones, Tyler R.", "project_titles": "Collaborative Research: Stable Isotopes of Ice in the Transition and Glacial Sections of the WAIS Divide Deep Ice Core", "projects": [{"proj_uid": "p0000078", "repository": "USAP-DC", "title": "Collaborative Research: Stable Isotopes of Ice in the Transition and Glacial Sections of the WAIS Divide Deep Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.47, "title": "Stable Isotopes of Ice in the Transition and Glacial Sections of the WAIS Divide Deep Ice Core", "uid": "600169", "west": -112.08}, {"awards": "1250208 Friedlaender, Ari", "bounds_geometry": ["POLYGON((-80 -63,-78 -63,-76 -63,-74 -63,-72 -63,-70 -63,-68 -63,-66 -63,-64 -63,-62 -63,-60 -63,-60 -63.7,-60 -64.4,-60 -65.1,-60 -65.8,-60 -66.5,-60 -67.2,-60 -67.9,-60 -68.6,-60 -69.3,-60 -70,-62 -70,-64 -70,-66 -70,-68 -70,-70 -70,-72 -70,-74 -70,-76 -70,-78 -70,-80 -70,-80 -69.3,-80 -68.6,-80 -67.9,-80 -67.2,-80 -66.5,-80 -65.8,-80 -65.1,-80 -64.4,-80 -63.7,-80 -63))"], "date_created": "Fri, 01 Jan 2016 00:00:00 GMT", "description": "Whales play a central role in the ecology and biogeochemistry of the Southern Ocean. However, little is known regarding their distribution and behavior, in part because of challenges associated with studying these organisms from large research vessels. This research will take advantage of the unique opportunity presented by the 2012-2013 test run of the smaller, more mobile R/V Point Sur. This work will use the Point Sur to investigate humpback whales in the waters studied by the Palmer Long Term Ecological Research (LTER) Station off the Western Antarctic Peninsula (WAP). Employing a combination of long-term satellite-linked tags and short-term suction cup tags, researchers will investigate the distribution, abundance and foraging behaviors of whales in this region. Whale biogeography will then be related to quantitative surveys of krill, their primary food source. Hypotheses regarding whale distribution and foraging strategies as well as physical oceanographic features will be tested. The WAP is undergoing some of the most dramatic warming on the planet, and a better understanding of the ecology of top predators is central to developing an understanding of the impacts of this change. Results will be widely disseminated through publications as well as through presentations at national and international meetings. In addition, raw data will be made available through open-access databases. Finally, this work will be coordinated with the extensive infrastructure of the Palmer LTER site, enabling outreach and educational activities.\n", "east": -60.0, "geometry": ["POINT(-70 -66.5)"], "keywords": "Antarctica; Antarctic Peninsula; Biota; Oceans; Sample/collection Description; Sample/Collection Description; Southern Ocean; Whales", "locations": "Southern Ocean; Antarctica; Antarctic Peninsula", "north": -63.0, "nsf_funding_programs": null, "persons": "Friedlaender, Ari; Johnston, David; Nowacek, Douglas", "project_titles": "RAPID: Linking the Movement Patterns and Foraging Behavior of Humpback Whales to their Prey across Multiple Spatial Scales within the LTER Study Region", "projects": [{"proj_uid": "p0000666", "repository": "USAP-DC", "title": "RAPID: Linking the Movement Patterns and Foraging Behavior of Humpback Whales to their Prey across Multiple Spatial Scales within the LTER Study Region"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -70.0, "title": "Linking the Movement Patterns and Foraging Behavior of Humpback Whales to their Prey across Multiple Spatial Scales within the LTER Study Region", "uid": "600151", "west": -80.0}, {"awards": "1043580 Reusch, David", "bounds_geometry": ["POLYGON((-180 -47,-144 -47,-108 -47,-72 -47,-36 -47,0 -47,36 -47,72 -47,108 -47,144 -47,180 -47,180 -51.3,180 -55.6,180 -59.9,180 -64.2,180 -68.5,180 -72.8,180 -77.1,180 -81.4,180 -85.7,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -85.7,-180 -81.4,-180 -77.1,-180 -72.8,-180 -68.5,-180 -64.2,-180 -59.9,-180 -55.6,-180 -51.3,-180 -47))"], "date_created": "Fri, 01 Jan 2016 00:00:00 GMT", "description": "The presence of ice ponds from surface melting of glacial ice can be a significant threshold in assessing the stability of ice sheets, and their overall response to a warming climate. Snow melt has a much reduced albedo, leading to additional seasonal melting from warming insolation. Water run-off not only contributes to the mass loss of ice sheets directly, but meltwater reaching the glacial ice bed may lubricate faster flow of ice sheets towards the ocean. Surficial meltwater may also reach the grounding lines of glacial ice through the wedging open of existing crevasses. The occurrence and amount of meltwater refreeze has even been suggested as a paleo proxy of near-surface atmospheric temperature regimes.\nUsing contemporary remote sensing (microwave) satellite assessment of surface melt occurrence and extent, the predictive skill of regional meteorological models and reanalyses (e.g. WRF, ERA-Interim) to describe the synoptic conditions favourable to surficial melt is to be investigated. Statistical approaches and pattern recognition techniques are argued to provide a context for projecting future ice sheet change.\nThe previous Intergovernmental Panel on Climate Change (IPCC AR4) commented on our lack of understanding of ice-sheet mass balance processes in polar regions and the potential for sea-level change. The IPPC suggested that the forthcoming AR5 efforts highlight regional cryosphere modeling efforts, such as is proposed here.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Atmosphere; Climate Model; Meteorology; Surface Melt", "locations": "Antarctica", "north": -47.0, "nsf_funding_programs": null, "persons": "Reusch, David", "project_titles": "Collaborative Research: Decoding \u0026 Predicting Antarctic Surface Melt Dynamics with Observations, Regional Atmospheric Modeling and GCMs", "projects": [{"proj_uid": "p0000447", "repository": "USAP-DC", "title": "Collaborative Research: Decoding \u0026 Predicting Antarctic Surface Melt Dynamics with Observations, Regional Atmospheric Modeling and GCMs"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Decoding \u0026 Predicting Antarctic Surface Melt Dynamics with Observations, Regional Atmospheric Modeling and GCMs", "uid": "600166", "west": -180.0}, {"awards": "0839031 Severinghaus, Jeffrey", "bounds_geometry": ["POINT(161.71965 -77.76165)"], "date_created": "Fri, 01 Jan 2016 00:00:00 GMT", "description": "This award supports a project to develop a precise gas-based chronology for an archive of large-volume samples of the ancient atmosphere, which would enable ultra-trace gas measurements that are currently precluded by sample size limitations of ice cores. The intellectual merit of the proposed work is that it will provide a critical test of the \u0027clathrate hypothesis\u0027 that methane clathrates contributed to the two abrupt atmospheric methane concentration increases during the last deglaciation 15 and 11 kyr ago. This approach employs large volumes of ice (\u003e1 ton) to measure carbon-14 on past atmospheric methane across the abrupt events. Carbon-14 is an ideal discriminator of fossil sources of methane to the atmosphere, because most methane sources (e.g., wetlands, termites, biomass burning) are rich in carbon-14, whereas clathrates and other fossil sources are devoid of carbon-14. The proposed work is a logical extension to Taylor Glacier, Antarctica, of an approach pioneered at the margin of the Greenland ice sheet over the past 7 years. The Greenland work found higher-than-expected carbon-14 values, likely due in part to contaminants stemming from the high impurity content of Greenland ice and the interaction of the ice with sediments from the glacier bed. The data also pointed to the possibility of a previously unknown process, in-situ cosmogenic production of carbon-14 methane (radiomethane) in the ice matrix. Antarctic ice in Taylor Glacier is orders of magnitude cleaner than the ice at the Greenland site, and is much colder and less stratigraphically disturbed, offering the potential for a clear resolution of this puzzle and a definitive test of the cosmogenic radiomethane hypothesis. Even if cosmogenic radiomethane in ice is found, it still may be possible to reconstruct atmospheric radiomethane with a correction enabled by a detailed understanding of the process, which will be sought by co-measuring carbon-14 in carbon monoxide and carbon dioxide. The broader impacts of the proposed work are that the clathrate test may shed light on the stability of the clathrate reservoir and its potential for climate feedbacks under human-induced warming. Development of Taylor Glacier as a \u0027horizontal ice core\u0027 would provide a community resource for other researchers. Education of one postdoc, one graduate student, and one undergraduate, would add to human resources. This award has field work in Antarctica.", "east": 161.71965, "geometry": ["POINT(161.71965 -77.76165)"], "keywords": "Antarctica; Cosmogenic; Geochemistry; Ice Core Records; Paleoclimate; Radiocarbon; Taylor Glacier; Transantarctic Mountains", "locations": "Taylor Glacier; Transantarctic Mountains; Antarctica", "north": -77.76165, "nsf_funding_programs": null, "persons": "Severinghaus, Jeffrey P.", "project_titles": "Collaborative Research: A \"Horizontal Ice Core\" for Large-Volume Samples of the Past Atmosphere, Taylor Glacier, Antarctica", "projects": [{"proj_uid": "p0000099", "repository": "USAP-DC", "title": "Collaborative Research: A \"Horizontal Ice Core\" for Large-Volume Samples of the Past Atmosphere, Taylor Glacier, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.76165, "title": "Measurements of in situ cosmogenic 14C from Taylor Glacier, Antarctica", "uid": "600165", "west": 161.71965}, {"awards": "1355533 Dayton, Paul", "bounds_geometry": ["POLYGON((163 -78,163.4 -78,163.8 -78,164.2 -78,164.6 -78,165 -78,165.4 -78,165.8 -78,166.2 -78,166.6 -78,167 -78,167 -78.05,167 -78.1,167 -78.15,167 -78.2,167 -78.25,167 -78.3,167 -78.35,167 -78.4,167 -78.45,167 -78.5,166.6 -78.5,166.2 -78.5,165.8 -78.5,165.4 -78.5,165 -78.5,164.6 -78.5,164.2 -78.5,163.8 -78.5,163.4 -78.5,163 -78.5,163 -78.45,163 -78.4,163 -78.35,163 -78.3,163 -78.25,163 -78.2,163 -78.15,163 -78.1,163 -78.05,163 -78))"], "date_created": "Fri, 01 Jan 2016 00:00:00 GMT", "description": "Antarctic benthic communities are characterized by many species of sponges (Phylum Porifera), long thought to exhibit extremely slow demographic patterns of settlement, growth and reproduction. This project will analyze many hundreds of diver and remotely operated underwater vehicle photographs documenting a unique, episodic settlement event that occurred between 2000 and 2010 in McMurdo Sound that challenges this paradigm of slow growth. Artificial structures were placed on the seafloor between 1967 and 1974 at several sites, but no sponges were observed to settle on these structures until 2004. By 2010 some 40 species of sponges had settled and grown to be surprisingly large. Given the paradigm of slow settlement and growth supported by the long observation period (37 years, 1967-2004), this extraordinary large-scale settlement and rapid growth over just a 6-year time span is astonishing. This project utilizes image processing software (ImageJ) to obtain metrics (linear dimensions to estimate size, frequency, percent cover) for sponges and other fauna visible in the photographs. It uses R to conduct multidimensional scaling to ordinate community data and ANOSIM to test for differences of community data among sites and times and structures. It will also use SIMPER and ranked species abundances to discriminate species responsible for any differences.\nThis work focuses on Antarctic sponges, but the observations of massive episodic recruitment and growth are important to understanding seafloor communities worldwide. Ecosystems are composed of populations, and populations are ecologically described by their distribution and abundance. A little appreciated fact is that sponges often dominate marine communities, but because sponges are so hard to study, most workers focus on other groups such as corals, kelps, or bivalves. Because most sponges settle and grow slowly their life history is virtually unstudied. The assumption of relative stasis of the Antarctic seafloor community is common, and this project will shatter this paradigm by documenting a dramatic episodic event. Finally, the project takes advantage of old transects from the 1960s and 1970s and compares them with extensive 2010 surveys of the same habitats and sometimes the same intact transect lines, offering a long-term perspective of community change. The investigators will publish these results in peer-reviewed journals, give presentations to the general public and will involve students from local outreach programs, high schools, and undergraduates at UCSD to help with the analysis.", "east": 167.0, "geometry": ["POINT(165 -78.25)"], "keywords": "Antarctica; Bentic Fauna; Biota; McMurdo Sound; Oceans; Ross Sea; Sample/collection Description; Sample/Collection Description; Southern Ocean", "locations": "Antarctica; Ross Sea; McMurdo Sound; Southern Ocean", "north": -78.0, "nsf_funding_programs": null, "persons": "Dayton, Paul", "project_titles": "EAGER: A Multi-decadal Record of Antarctic Benthos: Image Analysis to Maximize Data Utilization", "projects": [{"proj_uid": "p0000401", "repository": "USAP-DC", "title": "EAGER: A Multi-decadal Record of Antarctic Benthos: Image Analysis to Maximize Data Utilization"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.5, "title": "A Multi-decadal Record of Antarctic Benthos: Image Analysis to Maximize Data Utilization", "uid": "600164", "west": 163.0}, {"awards": "1245821 Brook, Edward J.", "bounds_geometry": ["POINT(162.167 -77.733)"], "date_created": "Fri, 01 Jan 2016 00:00:00 GMT", "description": "This award supports a project to use the Taylor Glacier, Antarctica, ablation zone to collect ice samples for a range of paleoenvironmental studies. A record of carbon-14 of atmospheric methane (14CH4) will be obtained for the last deglaciation and the Early Holocene, together with a supporting record of CH4 stable isotopes. In-situ cosmogenic 14C content and partitioning of 14C between different species (14CH4, C-14 carbon monoxide (14CO) and C-14 carbon dioxide (14CO2)) will be determined with unprecedented precision in ice from the surface down to ~67 m. Further age-mapping of the ablating ice stratigraphy will take place using a combination of CH4, CO2, and delta 18O of oxygen gas and H2O stable isotopes. High precision, high-resolution records of CO2, delta 13C of CO2, nitrous oxide (N2O) and N2O isotopes will be obtained for the last deglaciation and intervals during the last glacial period. The potential of 14CO2 and Krypton-81 (81Kr) as absolute dating tools for glacial ice will be investigated. The intellectual merit of proposed work includes the fact that the response of natural methane sources to continuing global warming is uncertain, and available evidence is insufficient to rule out the possibility of catastrophic releases from large 14C-depleted reservoirs such as CH4 clathrates and permafrost. The proposed paleoatmospheric 14CH4 record will improve our understanding of the possible magnitude and timing of CH4 release from these reservoirs during a large climatic warming. A thorough understanding of in-situ cosmogenic 14C in glacial ice (production rates by different mechanisms and partitioning between species) is currently lacking. Such an understanding will likely enable the use of in-situ 14CO in ice at accumulation sites as a reliable, uncomplicated tracer of the past cosmic ray flux and possibly past solar activity, as well as the use of 14CO2 at both ice accumulation and ice ablation sites as an absolute dating tool. Significant gaps remain in our understanding of the natural carbon cycle, as well as in its responses to global climate change. The proposed high-resolution, high-precision records of delta 13C of CO2 would provide new information on carbon cycle changes both during times of rising CO2 in a warming climate and falling CO2 in a cooling climate. N2O is an important greenhouse gas that increased by ~30% during the last deglaciation. The causes of this increase are still largely uncertain, and the proposed high-precision record of N2O concentration and isotopes would provide further insights into N2O source changes in a warming world. The broader impacts of proposed work include an improvement in our understanding of the response of these greenhouse gas budgets to global warming and inform societally important model projections of future climate change. The continued age-mapping of Taylor Glacier ablation ice will add value to this high-quality, easily accessible archive of natural environmental variability. Establishing 14CO as a robust new tracer for past cosmic ray flux would inform paleoclimate studies and constitute a valuable contribution to the study of the societally important issue of climate change. The proposed work will contribute to the development of new laboratory and field analytical systems. The data from the study will be made available to the scientific community and the broad public through the NSIDC and NOAA Paleoclimatology data centers. 1 graduate student each will be trained at UR, OSU and SIO, and the work will contribute to the training of a postdoc at OSU. 3 UR undergraduates will be involved in fieldwork and research. The work will support a new, junior UR faculty member, Petrenko. All PIs have a strong history of and commitment to scientific outreach in the forms of media interviews, participation in filming of field projects, as well as speaking to schools and the public about their research, and will continue these activities as part of the proposed work. This award has field work in Antarctica.", "east": 162.167, "geometry": ["POINT(162.167 -77.733)"], "keywords": "Antarctica; Atmosphere; Geochemistry; Ice Core Records; Isotope; Paleoclimate; Taylor Glacier; Transantarctic Mountains", "locations": "Transantarctic Mountains; Antarctica; Taylor Glacier", "north": -77.733, "nsf_funding_programs": null, "persons": "Brook, Edward J.", "project_titles": "Collaborative Research: The Taylor Glacier, Antarctica, Horizontal Ice Core: Exploring changes in the Natural Methane Budget in a Warming World and Expanding the Paleo-archive", "projects": [{"proj_uid": "p0000283", "repository": "USAP-DC", "title": "Collaborative Research: The Taylor Glacier, Antarctica, Horizontal Ice Core: Exploring changes in the Natural Methane Budget in a Warming World and Expanding the Paleo-archive"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.733, "title": "The Taylor Glacier, Antarctica, Horizontal Ice Core: Exploring changes in the Natural Methane Budget in a Warming World and Expanding the Paleo-archive", "uid": "600163", "west": 162.167}, {"awards": "1142162 Stone, John", "bounds_geometry": ["POLYGON((-104.14 -81.07,-102.24 -81.07,-100.34 -81.07,-98.44 -81.07,-96.54 -81.07,-94.64 -81.07,-92.74 -81.07,-90.84 -81.07,-88.94 -81.07,-87.04 -81.07,-85.14 -81.07,-85.14 -81.207,-85.14 -81.344,-85.14 -81.481,-85.14 -81.618,-85.14 -81.755,-85.14 -81.892,-85.14 -82.029,-85.14 -82.166,-85.14 -82.303,-85.14 -82.44,-87.04 -82.44,-88.94 -82.44,-90.84 -82.44,-92.74 -82.44,-94.64 -82.44,-96.54 -82.44,-98.44 -82.44,-100.34 -82.44,-102.24 -82.44,-104.14 -82.44,-104.14 -82.303,-104.14 -82.166,-104.14 -82.029,-104.14 -81.892,-104.14 -81.755,-104.14 -81.618,-104.14 -81.481,-104.14 -81.344,-104.14 -81.207,-104.14 -81.07))"], "date_created": "Fri, 01 Jan 2016 00:00:00 GMT", "description": "This award supports a reconnaissance geological and radar-sounding study of promising sites in West Antarctica for a future project to measure cosmogenic nuclides in subglacial bedrock. Field work will take place in the Whitmore Mountains, close to the WAIS divide, and on the Nash and Pirrit Hills, downflow from the divide in the Weddell Sea drainage. At each site geological indicators of higher (and lower) ice levels in the past will be mapped and evidence of subglacial erosion or its absence will be documented. Elevation transects of both glacial erratics and adjacent bedrock samples will be collected to establish the timing of recent deglaciation at the sites and provide a complement to similar measurements on material from depth transects obtained by future subglacial drilling. At each site, bedrock ridges will be traced into the subsurface with closely-spaced ice-penetrating radar surveys, using a combination of instruments and frequencies to obtain the highest possible surface detail. Collectively the results will define prospective sites for subglacial sampling, and maximize the potential information to be obtained from such samples in future studies. The intellectual merit of this project is that measurements of cosmogenic nuclides in subglacial bedrock hold promise for resolving the questions of whether the West Antarctic ice sheet collapsed completely in the past, whether it is prone to repeated large deglaciations, and if so, what is their magnitude and frequency. Such studies will require careful choice of targets, to locate sites where bedrock geology is favorable, cosmogenic nuclide records are likely to have been protected from subglacial erosion, and the local ice-surface response is indicative of large-scale ice sheet behavior. The broader impacts of this work include helping to determine whether subglacial surfaces in West Antarctica were ever exposed to cosmic rays, which will provide unambiguous evidence for or against a smaller ice sheet in the past. This is an important step towards establishing whether the WAIS is vulnerable to collapse in future, and will ultimately help to address uncertainty in forecasting sea level change. The results will also provide ground truth for models of ice-sheet dynamics and long-term ice sheet evolution, and will help researchers use these models to identify paleoclimate conditions responsible for WAIS deglaciation. The education and training of students (both undergraduate and graduate students) will play an important role in the project, which will involve Antarctic fieldwork, technically challenging labwork, data collection and interpretation, and communication of the outcome to scientists and the general public.", "east": -85.14, "geometry": ["POINT(-94.64 -81.755)"], "keywords": "Antarctica; Be-10; Chemistry:rock; Chemistry:Rock; Cosmogenic Dating; Glaciology; Nunataks; Sample/collection Description; Sample/Collection Description; Solid Earth; Whitmore Mountains", "locations": "Antarctica; Whitmore Mountains", "north": -81.07, "nsf_funding_programs": null, "persons": "Stone, John", "project_titles": "Glacial-interglacial History of West Antarctic Nunataks and Site Reconnaissance for Subglacial Bedrock Sampling", "projects": [{"proj_uid": "p0000335", "repository": "USAP-DC", "title": "Glacial-interglacial History of West Antarctic Nunataks and Site Reconnaissance for Subglacial Bedrock Sampling"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -82.44, "title": "Glacial-interglacial History of West Antarctic Nunataks and Site Reconnaissance for Subglacial Bedrock Sampling", "uid": "600162", "west": -104.14}, {"awards": "1142018 Arrigo, Kevin", "bounds_geometry": ["POLYGON((-75.8 -61.08,-74.457 -61.08,-73.114 -61.08,-71.771 -61.08,-70.428 -61.08,-69.085 -61.08,-67.742 -61.08,-66.399 -61.08,-65.056 -61.08,-63.713 -61.08,-62.37 -61.08,-62.37 -61.684,-62.37 -62.288,-62.37 -62.892,-62.37 -63.496,-62.37 -64.1,-62.37 -64.704,-62.37 -65.308,-62.37 -65.912,-62.37 -66.516,-62.37 -67.12,-63.713 -67.12,-65.056 -67.12,-66.399 -67.12,-67.742 -67.12,-69.085 -67.12,-70.428 -67.12,-71.771 -67.12,-73.114 -67.12,-74.457 -67.12,-75.8 -67.12,-75.8 -66.516,-75.8 -65.912,-75.8 -65.308,-75.8 -64.704,-75.8 -64.1,-75.8 -63.496,-75.8 -62.892,-75.8 -62.288,-75.8 -61.684,-75.8 -61.08))"], "date_created": "Fri, 01 Jan 2016 00:00:00 GMT", "description": "Global climate change is having significant effects on areas of the Southern Ocean, and a better understanding of this ecosystem will permit predictions about the large-scale implications of these shifts. The haptophyte Phaeocystis antarctica is an important component of the phytoplankton communities in this region, but little is known about the factors controlling its distribution. Preliminary data suggest that P. antarctica posses unique adaptations that allow it to thrive in regions with dynamic light regimes. This research will extend these results to identify the physiological and genetic mechanisms that affect the growth and distribution of P. antarctica. This work will use field and laboratory-based studies and a suite of modern molecular techniques to better understand the biogeography and physiology of this key organism. Results will be widely disseminated through publications as well as through presentations at national and international meetings. In addition, raw data will be made available through open-access databases. This project will support the research and training of two graduate students and will foster an established international collaboration with Dutch scientists. Researchers on this project will participate in outreach programs targeting K12 teachers as well as high school students.", "east": -62.37, "geometry": ["POINT(-69.085 -64.1)"], "keywords": "Antarctica; Antarctic Peninsula; Biota; Chlorophyll; CTD Data; NBP1310; NBP1409; Oceans; Physical Oceanography; Phytoplankton; Sea Surface; Southern Ocean", "locations": "Southern Ocean; Sea Surface; Antarctic Peninsula; Antarctica", "north": -61.08, "nsf_funding_programs": null, "persons": "Arrigo, Kevin", "project_titles": "Collaborative Research: Adaptive Responses of Phaeocystis Populations in Antarctic Ecosystems", "projects": [{"proj_uid": "p0000446", "repository": "USAP-DC", "title": "Collaborative Research: Adaptive Responses of Phaeocystis Populations in Antarctic Ecosystems"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -67.12, "title": "Adaptive Responses of Phaeocystis Populations in Antarctic Ecosystems", "uid": "600161", "west": -75.8}, {"awards": "1141973 Tedesco, Marco", "bounds_geometry": ["POLYGON((-94.7374 -56.9464,-89.23679 -56.9464,-83.73618 -56.9464,-78.23557 -56.9464,-72.73496 -56.9464,-67.23435 -56.9464,-61.73374 -56.9464,-56.23313 -56.9464,-50.73252 -56.9464,-45.23191 -56.9464,-39.7313 -56.9464,-39.7313 -59.19838,-39.7313 -61.45036,-39.7313 -63.70234,-39.7313 -65.95432,-39.7313 -68.2063,-39.7313 -70.45828,-39.7313 -72.71026,-39.7313 -74.96224,-39.7313 -77.21422,-39.7313 -79.4662,-45.23191 -79.4662,-50.73252 -79.4662,-56.23313 -79.4662,-61.73374 -79.4662,-67.23435 -79.4662,-72.73496 -79.4662,-78.23557 -79.4662,-83.73618 -79.4662,-89.23679 -79.4662,-94.7374 -79.4662,-94.7374 -77.21422,-94.7374 -74.96224,-94.7374 -72.71026,-94.7374 -70.45828,-94.7374 -68.2063,-94.7374 -65.95432,-94.7374 -63.70234,-94.7374 -61.45036,-94.7374 -59.19838,-94.7374 -56.9464))"], "date_created": "Fri, 01 Jan 2016 00:00:00 GMT", "description": "This award supports a project to generate first-time validated enhanced spatial resolution (5-10 km) maps of surface melting over the Antarctic Peninsula for the period 1958 - to date from the outputs of a regional climate model and different downscaling techniques. These maps will be assessed and validated through new high spatial resolution (2.25 km) surface melting maps obtained from the QuikSCAT satellite for the period 1999 - 2009. The intellectual merit of this work is that it would be the first time that the outputs of a regional climate model would be used to study surface melting over Antarctica at such high spatial resolution and the first time that such results are validated by means of an observational tool that has such a large spatial coverage and high spatial resolution. The results generated in this study would also provide a first-time opportunity to study the melt distribution over the Peninsula and its correlation with climate drivers, such as the Southern Annual Mode (SAM) and the El Nino-Southern Oscillation (ENSO) at these unprecedented spatial scales. The enhanced resolution melting maps will also offer a unique opportunity to study melting trends and patterns over specific regions of the Peninsula, such as the Wilkins and the Larsen A and B ice shelves and evaluate whether the extreme melting observed during the recent collapses was unprecedented over the + 50 years. The broader impacts of the project are that it will integrate research and education by fully supporting one female undergrad student, a PhD student and partially supporting a PostDoc. The work will be done at a minority-serving institution and the PhD student who worked on the development of the high-resolution melting data set from QuikSCAT will become the PostDoc who will work on this project. Teaching and learning will be supported by incorporating research results into graduate and undergrad level courses and will be disseminated over the web and through appropriate channels. Results from this project will also benefit the society at large as they will improve our understanding of the links between atmospheric patterns and surface melting and they will contribute to improving estimates of sea level rise from the Antarctica continent.", "east": -39.7313, "geometry": ["POINT(-67.23435 -68.2063)"], "keywords": "Antarctica; Atmosphere; Climate; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Meteorology; Model", "locations": "Antarctica", "north": -56.9464, "nsf_funding_programs": null, "persons": "Tedesco, Marco", "project_titles": "Enhanced Spatial Resolution Surface Melting over the Antarctic Peninsula (1958 - to date) from a Regional Climate Model Validated through Remote Sensing Observations", "projects": [{"proj_uid": "p0000313", "repository": "USAP-DC", "title": "Enhanced Spatial Resolution Surface Melting over the Antarctic Peninsula (1958 - to date) from a Regional Climate Model Validated through Remote Sensing Observations"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.4662, "title": "Enhanced Spatial Resolution Surface Melting over the Antarctic Peninsula (1958 - to date) from a Regional Climate Model Validated through Remote Sensing Observations", "uid": "600160", "west": -94.7374}, {"awards": "1043750 Chen, Jianli", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Fri, 01 Jan 2016 00:00:00 GMT", "description": "This award supports a project to improve the estimate of long-term and inter-annual variability of Antarctic ice sheet mass balance at continental, regional, and catchment scales, using satellite gravity measurements from the Gravity Recovery and Climate Experiment (GRACE) and other geodetic measurements. The work will improve the quantification of long-term mass change rates over Antarctica using GRACE gravity data with a longer record and newer generation(s) of products and will develop advanced numerical forward modeling techniques that can accurately correct leakage effects associated with GRACE data processing, and significantly improve spatial resolution of GRACE mass rate estimates over Antarctica. The work will also contribute to a better understanding of crustal uplift rates due to postglacial rebound (PGR) and present day ice load change over Antarctica via PGR models, GPS measurements, and combined analysis of GRACE and ICESat elevation changes. Inter-annual variations of ice mass over Antarctica will be investigated at continental and catchment scales and connections to regional climate change will be studied. The major deliverables from this study will be improved assessments of ice mass balance for the entire Antarctic ice sheet and potential contribution to global mean sea level rise. The work will also provide estimates of regional ice mass change rates over Antarctica, with a focus along the coast in the Amundsen Sea Embayment, the Peninsula in West Antarctica, and in Wilkes Land and Victoria Land in East Antarctica. Estimates of inter-annual ice mass change over Antarctica at various spatial scales, and assessments of uncertainty of GRACE ice rate estimates and PGR models errors over Antarctica will also be made. The intellectual merits of the proposed investigation include 1) providing improved assessments of Antarctic ice mass balance at different temporal and spatial scales with unprecedented accuracy, an important contribution to broad areas of polar science research; 2) combining high accuracy GPS vertical uplift measurements and PGR models to better quantify long-term crust uplift effects that are not distinguishable from ice mass changes by GRACE; and 3) unifying the work of several investigations at the forefront of quantifying ice sheet and glacier mass balance and crustal uplift based on a variety of modern space geodetic observations. The broader impacts include the fact that the project will actively involve student participation and training, through the support of two graduate students. In addition the project will contribute to general education and public outreach (E/PO) activities and the results from this investigation will help inspire future geoscientists and promote public awareness of significant manifestations of climate change.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPS; GRACE; Potential Field; Satellite Data", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": null, "persons": "Chen, Jianli", "project_titles": "Collaborative Research: Long-Term and Interannual Variability of Antarctic Ice Sheet Mass Balance From Satellite Gravimetry and Other Geodetic Measurements", "projects": [{"proj_uid": "p0000415", "repository": "USAP-DC", "title": "Collaborative Research: Long-Term and Interannual Variability of Antarctic Ice Sheet Mass Balance From Satellite Gravimetry and Other Geodetic Measurements"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Long-Term and Interannual Variability of Antarctic Ice Sheet Mass Balance From Satellite Gravimetry and Other Geodetic Measurements", "uid": "600159", "west": -180.0}, {"awards": "1043145 Obbard, Rachel", "bounds_geometry": ["POLYGON((164.1005 -77.1188,164.36443 -77.1188,164.62836 -77.1188,164.89229 -77.1188,165.15622 -77.1188,165.42015 -77.1188,165.68408 -77.1188,165.94801 -77.1188,166.21194 -77.1188,166.47587 -77.1188,166.7398 -77.1188,166.7398 -77.19337,166.7398 -77.26794,166.7398 -77.34251,166.7398 -77.41708,166.7398 -77.49165,166.7398 -77.56622,166.7398 -77.64079,166.7398 -77.71536,166.7398 -77.78993,166.7398 -77.8645,166.47587 -77.8645,166.21194 -77.8645,165.94801 -77.8645,165.68408 -77.8645,165.42015 -77.8645,165.15622 -77.8645,164.89229 -77.8645,164.62836 -77.8645,164.36443 -77.8645,164.1005 -77.8645,164.1005 -77.78993,164.1005 -77.71536,164.1005 -77.64079,164.1005 -77.56622,164.1005 -77.49165,164.1005 -77.41708,164.1005 -77.34251,164.1005 -77.26794,164.1005 -77.19337,164.1005 -77.1188))"], "date_created": "Fri, 01 Jan 2016 00:00:00 GMT", "description": "A range of chemical and microphysical pathways in polar latitudes, including spring time (tropospheric) ozone depletion, oxidative pathways for mercury, and cloud condensation nuclei (CCN) production leading to changes in the cloud cover and attendant surface energy budgets, have been invoked as being dependent upon the emission of halogen gases formed in sea-ice.\nThe prospects for climate warming induced reductions in sea ice extent causing alteration of these incompletely known surface-atmospheric feedbacks and interactions requires confirmation of mechanistic details in both laboratory studies and field campaigns. One such mechanistic question is how bromine (BrO and Br) enriched snow migrates or is formed through processes in sea-ice, prior to its subsequent mobilization as an aerosol fraction into the atmosphere by strong winds. Once aloft, it may react with ozone and other atmospheric species. Dartmouth researchers will collect snow from the surface of sea ice, from freely blowing snow and in sea-ice cores from Cape Byrd, Ross Sea. A range of spectroscopic, microanalytic and and microstructural approaches will be subsequently used to determine the Br distribution gradients through sea-ice, in order to shed light on how sea-ice first forms and then releases bromine species into the polar atmospheric boundary layer.", "east": 166.7398, "geometry": ["POINT(165.42015 -77.49165)"], "keywords": "Atmosphere; Chemistry:ice; Chemistry:Ice; Critical Zone; Crystals; Glaciology; Oceans; Photo/video; Photo/Video; Ross Sea; Sea Ice; Sea Surface; Snow; Southern Ocean", "locations": "Ross Sea; Sea Surface; Southern Ocean", "north": -77.1188, "nsf_funding_programs": null, "persons": "Obbard, Rachel", "project_titles": "Bromide in Snow in the Sea Ice Zone", "projects": [{"proj_uid": "p0000414", "repository": "USAP-DC", "title": "Bromide in Snow in the Sea Ice Zone"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.8645, "title": "Bromide in Snow in the Sea Ice Zone", "uid": "600158", "west": 164.1005}, {"awards": "0944646 Bowser, Samuel", "bounds_geometry": ["POLYGON((-160 -68,-159 -68,-158 -68,-157 -68,-156 -68,-155 -68,-154 -68,-153 -68,-152 -68,-151 -68,-150 -68,-150 -69,-150 -70,-150 -71,-150 -72,-150 -73,-150 -74,-150 -75,-150 -76,-150 -77,-150 -78,-151 -78,-152 -78,-153 -78,-154 -78,-155 -78,-156 -78,-157 -78,-158 -78,-159 -78,-160 -78,-160 -77,-160 -76,-160 -75,-160 -74,-160 -73,-160 -72,-160 -71,-160 -70,-160 -69,-160 -68))"], "date_created": "Fri, 01 Jan 2016 00:00:00 GMT", "description": "This research project will continue studies of a taxonomically definitive group of early evolving (single-chambered) Foraminifera at both multi-gene molecular and ultrastructural levels of analysis, in order to generate more robust and detailed phylogenies of these ecologically-important organisms. Studies will be extended to include members of the enigmatic genus Gromia, to better define their ecological significance and placement within the protistan supergroup Rhizara. Together, these structural and molecular data will be used to complete taxonomic descriptions of over 20 new rhizarian species. The research will develop rapid molecular screening methods for future ecological studies of rhizarian protists, and uncover the driving forces that led to their diversification. A range of educational activities will target local and national audiences, and include development of hands-on, standards-based, innovative science classroom activities. In addition, a short art/science documentary film depicting research on the biology and evolution of Antarctic rhizarian protists will form the basis of a workshop hosted by the Capital Region Center for Arts in Education. Note: There are no data associated with this entry.", "east": -150.0, "geometry": ["POINT(-155 -73)"], "keywords": "Antarctica; Biota; Foraminifera; Oceans; Southern Ocean", "locations": "Antarctica; Southern Ocean", "north": -68.0, "nsf_funding_programs": null, "persons": "Bowser, Samuel S.", "project_titles": "Evolution and Diversity of Antarctic Rhizarian Protists", "projects": [{"proj_uid": "p0000413", "repository": "USAP-DC", "title": "Evolution and Diversity of Antarctic Rhizarian Protists"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Evolution and Diversity of Antarctic Rhizarian Protists", "uid": "600157", "west": -160.0}, {"awards": "0944282 Hasiotis, Stephen", "bounds_geometry": ["POINT(175 -86)"], "date_created": "Fri, 01 Jan 2016 00:00:00 GMT", "description": "This proposal will study the diversity, abundance, and tiering patterns of ichnofossils in continental and marine deposits of the Beacon Supergroup in the Beardmore Glacier Area (BGA). The PIs will focus on continental strata that contain a variety of ichnofossils and paleosols. Ichnofossils will be evaluated for their architectural and surficial morphologies, and will be compared to modern and ancient traces to interpret the tracemaker behavior and paleoenvironmental setting. Distribution of ichnofossils within these units may indicate the effect of lateral variability of pedogenesis, the magnitude and frequency of depositional events, and the amount of moisture within the sediment, as well as the effects of climate change. The paleoclimatic significance of ichnofossils will be determined by comparing the burrow size, occurrence, tiering, and pedogenic significance of ichnofossils in measured sections of stratigraphic units deposited during global warming and cooling episodes. Comparisons will be made between BGA formations to stratigraphically equivalent rocks deposited at low paleolatitudes with previously determined paleoclimatic settings. The objectives of this project are to address two major questions: what differences existed in ichnodiversity, abundance, and tiering in marine and continental deposits between high- and low-paleolatitudes, and was there a dearth of habitat usage in continental deposits during the late Paleozoic and Mesozoic, particularly in fluvial and lacustrine environments compared to the habitat usage in the marine realm at that time?\nThis study will enhance the ability to interpret paleoenvironments to the subenvironmental scale, understand the evolution of soil biota and ecosystems at high paleolatitudes, determine the role of organisms in soil formation at high paleolatitudes, explore the effects of climate change on the body size and diversity of organisms in the soil communities, and develop new tools to interpret paleoclimate in high latitudes. There is a strong education component associated with this proposal.", "east": 175.0, "geometry": ["POINT(175 -86)"], "keywords": "Antarctica; Beardmore Glacier; Biota; Fossil; Paleoclimate; Sample/collection Description; Sample/Collection Description; Solid Earth; Transantarctic Mountains", "locations": "Transantarctic Mountains; Beardmore Glacier; Antarctica", "north": -86.0, "nsf_funding_programs": null, "persons": "Hasiotis, Stephen", "project_titles": "Paleoenvironmental and Paleoclimatic Analysis of the Beacon Supergroup, Beardmore Glacier Area, Central Transantarctic Mountains, Antarctica", "projects": [{"proj_uid": "p0000423", "repository": "USAP-DC", "title": "Paleoenvironmental and Paleoclimatic Analysis of the Beacon Supergroup, Beardmore Glacier Area, Central Transantarctic Mountains, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -86.0, "title": "Paleoenvironmental and Paleoclimatic Analysis of the Beacon Supergroup, Beardmore Glacier Area, Central Transantarctic Mountains, Antarctica", "uid": "600156", "west": 175.0}, {"awards": "0839107 Powell, Ross", "bounds_geometry": ["POLYGON((-163.7 -84,-163.68 -84,-163.66 -84,-163.64 -84,-163.62 -84,-163.6 -84,-163.58 -84,-163.56 -84,-163.54 -84,-163.52 -84,-163.5 -84,-163.5 -84.05,-163.5 -84.1,-163.5 -84.15,-163.5 -84.2,-163.5 -84.25,-163.5 -84.3,-163.5 -84.35,-163.5 -84.4,-163.5 -84.45,-163.5 -84.5,-163.52 -84.5,-163.54 -84.5,-163.56 -84.5,-163.58 -84.5,-163.6 -84.5,-163.62 -84.5,-163.64 -84.5,-163.66 -84.5,-163.68 -84.5,-163.7 -84.5,-163.7 -84.45,-163.7 -84.4,-163.7 -84.35,-163.7 -84.3,-163.7 -84.25,-163.7 -84.2,-163.7 -84.15,-163.7 -84.1,-163.7 -84.05,-163.7 -84))"], "date_created": "Fri, 01 Jan 2016 00:00:00 GMT", "description": "The RAGES project (Robotic Access to Grounding zones for Exploration and Science) is one of three research components of the WISSARD (Whillans Ice Stream Subglacial Access Research Drilling) integrative initiative that is being funded by the Antarctic Integrated System Science Program of NSF\u0027s Office of Polar Programs, Antarctic Division. The overarching scientific objective of WISSARD is to assess the role of water beneath a West Antarctic ice stream in interlinked glaciological, geological, microbiological, geochemical, and oceanographic systems. The RAGES component of WISSARD concentrates on the stability of ice stream grounding zones (GZ), the area where the ice, ocean waters and glacial and sea floor sediment interact. Based on our present limited data and modeling efforts, GZs can be perturbed by (i) internal ice stream dynamics, (ii) filling/draining cycles of subglacial lakes, (iii) increased melting by warming ocean waters, and/or (iv) rates of subglacial sediment (till) supply to the GZ. GZs are seen as high priority targets to investigate due to their unknown contributions to ice sheet stability under future global warming scenarios. The three main science goals for RAGES are to assess: (a) West Antarctic Ice Sheet (WAIS) stability relative to the magnitudes of the four main variables listed above; (b) the degree to which grounding-zone sedimentary systems house important records of past WAIS dynamics; and (c) the importance of microbial activity and subglacial geochemical weathering in supplying nutrients to the WAIS grounding zone, the Ross Ice Shelf (RIS) cavity, and the highly productive Southern Ocean that may ultimately influence global biogeochemical cycles. The RAGES field sampling plan integrates surface geophysical surveys with borehole and subglacial sampling and measurements. The boreholes provide: (1) samples of subglacial water, sediments, and basal ice for biological, geochemical, glaciological, sedimentological, and micropaleontological analyses; (2) measures of subglacial and sub-ice-shelf cavity physical and chemical conditions and their spatial variability; and (3) data on sediment types, state and change of the subglacial water discharge, oceanography, and basal ice at the grounding line and within the nearby sub-ice-shelf cavity. Unique tools to be deployed include a multisensor Sub-Ice ROVer (Remotely Operated Vehicle) and long-term, sub-ice oceanographic moorings.\nThe latest report of the Intergovernmental Panel on Climate Change recognized that the greatest uncertainties in assessing future global sea-level change stem from a poor understanding of ice sheet dynamics and ice sheet vulnerability to oceanic and atmospheric warming. Disintegration of the WAIS (West Antarctic Ice Sheet) alone would contribute 3-5 m to global sea-level rise, making WAIS a focus of scientific concern due to its potential susceptibility to internal or ocean-driven instability. The overall WISSARD project will test the overarching hypothesis that active water drainage connects various subglacial environments and exerts major control on ice sheet flow, geochemistry, metabolic and phylogenetic diversity, and biogeochemical transformations.\nSocietal Relevance: Global warming, melting of ice sheets and consequential sea-level rise are of high societal relevance. Science Resource Development: After a 9-year hiatus WISSARD will provide the US-science community with a renewed capability to access and study sub-ice sheet environments. Developing this technological infrastructure will benefit the broader science community and assets will be accessible for future use through the NSF-OPP drilling contractor. The RAGES project represents a significant advance in polar technology by incorporating the use of complex new instrumentation like the Sub-Ice ROVer and subglacial ocean/lake mooring systems. Furthermore, these projects will pioneer an approach implementing recommendations from the National Research Council committee on Principles of Environmental Stewardship for the Exploration and Study of Subglacial Environments (2007). Education and Outreach (E/O): These activities are grouped into four categories: i) increasing student participation in polar research by fully integrating them in our research programs; ii) introducing new investigators to the polar sciences by incorporating promising young investigators in our programs, iii) promotion of K-12 teaching and learning programs by incorporating various teachers and NSTA programs, and iv) reaching a larger public audience through such venues as popular science magazines, museum based activities and videography and documentary films. In summary, WISSARD will promote scientific exploration of Antarctica by conveying to the public the excitement of accessing and studying what may be some of the last unexplored aquatic environments on Earth, and which represent a potential analogue for extraterrestrial life habitats on Europa and Mars.", "east": -163.5, "geometry": ["POINT(-163.6 -84.25)"], "keywords": "Antarctica; Glaciology; Oceans; Southern Ocean; WISSARD", "locations": "Antarctica; Southern Ocean", "north": -84.0, "nsf_funding_programs": null, "persons": "Powell, Ross", "project_titles": "Collaborative Research: Integrative Study of Marine Ice Sheet Stability \u0026 Subglacial Life Habitats in W Antarctica - Lake \u0026 Ice Stream Subglacial Access Research Drilling (LISSARD)", "projects": [{"proj_uid": "p0000105", "repository": "USAP-DC", "title": "Collaborative Research: Integrative Study of Marine Ice Sheet Stability \u0026 Subglacial Life Habitats in W Antarctica - Lake \u0026 Ice Stream Subglacial Access Research Drilling (LISSARD)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -84.5, "title": "Integrative Study of Marine Ice Sheet Stability and Subglacial Life Habitats - Robotic Access to Grounding-zones for Exploration and Science (RAGES)", "uid": "600155", "west": -163.7}, {"awards": "1043018 Pollard, David", "bounds_geometry": ["POINT(-85 -82)"], "date_created": "Thu, 03 Dec 2015 00:00:00 GMT", "description": "Ice-sheet model output of Antarctic Ice Sheet simulations spanning 30,000 years BP to 5000+ years in the future.", "east": -85.0, "geometry": ["POINT(-85 -82)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Sheet Model", "locations": "Antarctica", "north": -82.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Pollard, David", "project_titles": "Collaborative Research: A New Reconstruction of the Last West Antarctic Ice Sheet Deglaciation in the Ross Sea", "projects": [{"proj_uid": "p0000194", "repository": "USAP-DC", "title": "Collaborative Research: A New Reconstruction of the Last West Antarctic Ice Sheet Deglaciation in the Ross Sea"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -82.0, "title": "Ice Sheet Model Output, West Antarctic Ice Sheet Deglaciation", "uid": "609639", "west": -85.0}, {"awards": "0230316 White, James", "bounds_geometry": ["POINT(-134.43 -74.04)"], "date_created": "Tue, 24 Nov 2015 00:00:00 GMT", "description": "This data set consists of water isotope ratios from the Mt. Moulton ice-trench record, as well as data from the Taylor Dome, EPICA Dome C, Talos Dome, Vostok, and EPICA Dronning Maud Land ice cores.", "east": -134.43, "geometry": ["POINT(-134.43 -74.04)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Epica Dome C; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Isotope; Lake Vostok; Mount Moulton; Paleoclimate; Talos Dome; Taylor Dome", "locations": "Antarctica; Talos Dome; Taylor Dome; Epica Dome C; Mount Moulton; Lake Vostok", "north": -74.04, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Steig, Eric J.; White, James; Popp, Trevor", "project_titles": "Collaborative Research: Refining a 500-kry Climate Record From the Moulton Blue Ice Field in West Antarctica", "projects": [{"proj_uid": "p0000755", "repository": "USAP-DC", "title": "Collaborative Research: Refining a 500-kry Climate Record From the Moulton Blue Ice Field in West Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -74.04, "title": "Mount Moulton Isotopes and Other Ice Core Data", "uid": "609640", "west": -134.43}, {"awards": "1043780 Aydin, Murat", "bounds_geometry": ["POINT(-112.1 -79.5)"], "date_created": "Tue, 27 Oct 2015 00:00:00 GMT", "description": "These data contain the results of gas chromatography mass spectrometry (GC-MS) analysis of 207 samples from the WAIS Divide 06A ice core. The trace gases found in the 207 samples are ethane (C2H6), propane (C3H8), n-butane (n-C4H10), carbonyl sulfide (COS), carbon disulfide (CS2), methyl chloride (CH3Cl), and methyl bromide (CH3Br).\u00a0", "east": -112.1, "geometry": ["POINT(-112.1 -79.5)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; WAIS Divide; WAIS Divide Ice Core", "locations": "WAIS Divide; Antarctica", "north": -79.5, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Aydin, Murat; Saltzman, Eric", "project_titles": "Carbonyl Sulfide Measurements in the Deep West Antarctic Ice Sheet Divide Ice Core", "projects": [{"proj_uid": "p0000055", "repository": "USAP-DC", "title": "Carbonyl Sulfide Measurements in the Deep West Antarctic Ice Sheet Divide Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.5, "title": "Ultra-trace Measurements in the WAIS Divide 06A Ice Core", "uid": "609659", "west": -112.1}, {"awards": "0538657 Severinghaus, Jeffrey", "bounds_geometry": ["POINT(-38.5 -76.2)"], "date_created": "Tue, 27 Oct 2015 00:00:00 GMT", "description": "This data set contains the results of Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) performed on an archive of the GISP2 ice core containing the rapid climate warming of Dansgaard-Oeschger Event 21.", "east": -38.5, "geometry": ["POINT(-38.5 -76.2)"], "keywords": "Arctic; Geochemistry; GISP; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Paleoclimate", "locations": "Arctic", "north": -76.2, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Haines, Skylar; Mayewski, Paul A.; Kurbatov, Andrei V.", "project_titles": "Nitrogen and Oxygen Gas Isotopes in the WAIS Divide Ice Core as Constraints on Chronology, Temperature, and Accumulation Rate", "projects": [{"proj_uid": "p0000036", "repository": "USAP-DC", "title": "Nitrogen and Oxygen Gas Isotopes in the WAIS Divide Ice Core as Constraints on Chronology, Temperature, and Accumulation Rate"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -76.2, "title": "Ultra-High Resolution LA-ICP-MS Results: DO-21 Rapid Warming Event", "uid": "609635", "west": -38.5}, {"awards": "1042883 Mayewski, Paul", "bounds_geometry": ["POINT(-148.82 -81.66)"], "date_created": "Tue, 27 Oct 2015 00:00:00 GMT", "description": "This data set contains the results of Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) performed on an archive of the Siple Dome A ice core containing the rapid climate warming of Dansgaard-Oeschger Event 21.", "east": -148.82, "geometry": ["POINT(-148.82 -81.66)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; ICP-MS; Paleoclimate; Siple Dome; Siple Dome Ice Core", "locations": "Antarctica; Siple Dome", "north": -81.66, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Haines, Skylar; Mayewski, Paul A.; Kurbatov, Andrei V.", "project_titles": "Roosevelt Island Climate Evolution Project (RICE): US Deep Ice Core Glaciochemistry Contribution (2011- 2014)", "projects": [{"proj_uid": "p0000193", "repository": "USAP-DC", "title": "Roosevelt Island Climate Evolution Project (RICE): US Deep Ice Core Glaciochemistry Contribution (2011- 2014)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core", "south": -81.66, "title": "LA-ICP-MS Results: 3 Siple Dome A Glacial Age Archives", "uid": "609636", "west": -148.82}, {"awards": "0538657 Severinghaus, Jeffrey", "bounds_geometry": ["POINT(-112.08 -79.47)"], "date_created": "Tue, 20 Oct 2015 00:00:00 GMT", "description": "This data set is a low-resolution set of measurements of d15N of N2 and d18O of O2, along with dO2/N and dAr/N2 supporting data, in the WAIS Divide 3405 m long ice core recovered in 2011. Data are distributed via FTP.", "east": -112.08, "geometry": ["POINT(-112.08 -79.47)"], "keywords": "Antarctica; Chemistry:fluid; Chemistry:Fluid; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Paleoclimate; WAIS Divide; WAIS Divide Ice Core", "locations": "WAIS Divide; Antarctica", "north": -79.47, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Severinghaus, Jeffrey P.", "project_titles": "Nitrogen and Oxygen Gas Isotopes in the WAIS Divide Ice Core as Constraints on Chronology, Temperature, and Accumulation Rate", "projects": [{"proj_uid": "p0000036", "repository": "USAP-DC", "title": "Nitrogen and Oxygen Gas Isotopes in the WAIS Divide Ice Core as Constraints on Chronology, Temperature, and Accumulation Rate"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.47, "title": "Low-res d15N and d18O of O2 in the WAIS Divide 06A Deep Core", "uid": "609660", "west": -112.08}, {"awards": "0739766 Brook, Edward J.", "bounds_geometry": ["POINT(-112.08 -79.46)"], "date_created": "Tue, 06 Oct 2015 00:00:00 GMT", "description": "The data are measurements of carbon dioxide (CO\u003csub\u003e2\u003c/sub\u003e) from the WAIS Divide Ice Core, WDC06A, Antarctica.", "east": -112.08, "geometry": ["POINT(-112.08 -79.46)"], "keywords": "Antarctica; Chemistry:fluid; Chemistry:Fluid; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Paleoclimate; WAIS Divide; WAIS Divide Ice Core", "locations": "WAIS Divide; Antarctica", "north": -79.46, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Brook, Edward J.; Marcott, Shaun", "project_titles": "Atmospheric Carbon Dioxide and Climate Change: The WAIS Divide Ice Core Record", "projects": [{"proj_uid": "p0000044", "repository": "USAP-DC", "title": "Atmospheric Carbon Dioxide and Climate Change: The WAIS Divide Ice Core Record"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.46, "title": "WAIS Divide Ice Core CO2", "uid": "609651", "west": -112.08}, {"awards": "1042883 Mayewski, Paul", "bounds_geometry": ["POINT(-161.53 -79.39)"], "date_created": "Tue, 29 Sep 2015 00:00:00 GMT", "description": "This data set includes three Roosevelt Island Climate Evolution (RICE) ice core samples drilled on Roosevelt Island, Ross Ice Shelf, Antarctica. The RICE elements analyzed were: Sr, Cd, Cs, Ba, La, Ce, Pr, Pb, Bi, U, As, Li, I, Al, S, Ca, Ti, V, Cr, Mn, Fe, Co, Na, Mg, Cu, Zn, and K verses depth.", "east": -161.53, "geometry": ["POINT(-161.53 -79.39)"], "keywords": "Antarctica; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; ICP-MS; Roosevelt Island; Ross Ice Shelf", "locations": "Antarctica; Roosevelt Island; Ross Ice Shelf", "north": -79.39, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Mayewski, Paul A.; Kurbatov, Andrei V.", "project_titles": "Roosevelt Island Climate Evolution Project (RICE): US Deep Ice Core Glaciochemistry Contribution (2011- 2014)", "projects": [{"proj_uid": "p0000193", "repository": "USAP-DC", "title": "Roosevelt Island Climate Evolution Project (RICE): US Deep Ice Core Glaciochemistry Contribution (2011- 2014)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.39, "title": "Roosevelt Island Climate Evolution Ice Core ICP-MS data", "uid": "609621", "west": -161.53}, {"awards": "0944794 Winberry, J. Paul", "bounds_geometry": ["POLYGON((-165 -83.75,-164 -83.75,-163 -83.75,-162 -83.75,-161 -83.75,-160 -83.75,-159 -83.75,-158 -83.75,-157 -83.75,-156 -83.75,-155 -83.75,-155 -83.85,-155 -83.95,-155 -84.05,-155 -84.15,-155 -84.25,-155 -84.35,-155 -84.45,-155 -84.55,-155 -84.65,-155 -84.75,-156 -84.75,-157 -84.75,-158 -84.75,-159 -84.75,-160 -84.75,-161 -84.75,-162 -84.75,-163 -84.75,-164 -84.75,-165 -84.75,-165 -84.65,-165 -84.55,-165 -84.45,-165 -84.35,-165 -84.25,-165 -84.15,-165 -84.05,-165 -83.95,-165 -83.85,-165 -83.75))"], "date_created": "Thu, 17 Sep 2015 00:00:00 GMT", "description": "These data contain ice velocity measurements obtained from seismic and GPS recordings during the 2010 and 2011 Antarctic field seasons.", "east": -155.0, "geometry": ["POINT(-160 -84.25)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPS; Whillans Ice Stream", "locations": "Whillans Ice Stream; Antarctica", "north": -83.75, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Wiens, Douglas; Winberry, Paul; Anandakrishnan, Sridhar; Alley, Richard", "project_titles": "Collaborative Research: Geophysical Study of Ice Stream Stick-slip Dynamics", "projects": [{"proj_uid": "p0000053", "repository": "USAP-DC", "title": "Collaborative Research: Geophysical Study of Ice Stream Stick-slip Dynamics"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -84.75, "title": "Whillans Ice Stream Stick-slip", "uid": "609632", "west": -165.0}, {"awards": "0732730 Truffer, Martin", "bounds_geometry": ["POINT(-100.5 -75.1)"], "date_created": "Fri, 31 Jul 2015 00:00:00 GMT", "description": "This data set is a time series of borehole temperatures at different depths from three thermistor strings deployed in three boreholes drilled through the Pine Island Glacier ice shelf, Antarctica.", "east": -100.5, "geometry": ["POINT(-100.5 -75.1)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Pine Island Glacier; Temperature", "locations": "Pine Island Glacier; Antarctica", "north": -75.1, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Truffer, Martin; Stanton, Timothy", "project_titles": "Collaborative Research; IPY: Ocean-Ice Interaction in the Amundsen Sea sector of West Antarctica", "projects": [{"proj_uid": "p0000043", "repository": "USAP-DC", "title": "Collaborative Research; IPY: Ocean-Ice Interaction in the Amundsen Sea sector of West Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -75.1, "title": "Borehole Temperatures at Pine Island Glacier, Antarctica", "uid": "609627", "west": -100.5}, {"awards": "1043518 Brook, Edward J.; 1142041 Brook, Edward J.; 0944552 Brook, Edward J.; 0839093 McConnell, Joseph; 1142166 McConnell, Joseph", "bounds_geometry": ["POINT(-112.05 -79.28)"], "date_created": "Thu, 23 Jul 2015 00:00:00 GMT", "description": "This data set contains methane concentrations from a West Antarctic Ice Sheet (WAIS) Divide ice core obtained by an online, continuous technique (Stowasser, et al. 2012). \u003cbr\u003e\u003c/br\u003e IMPORTANT NOTE: The experiment-time-integrated data are made available as a comprehensive archive of WAIS-Divide methane measurements. In the vast majority of cases the 2-yearly spline fit will be the most suitable for your application (Rhodes_Science_2015_WD_CH4_noaa-wdc-paleo (8).xlsx or Rhodes_Science_2015_WD_CH4_noaa-wdc-paleo.txt). \u003cbr\u003e \u003c/br\u003e For more detailed information on the 2 yearly cubic smoothing spline please refer to references listed, in particular, the Supplementary Material of Rhodes et al. (2015).", "east": -112.05, "geometry": ["POINT(-112.05 -79.28)"], "keywords": "Antarctica; Chemistry:fluid; Chemistry:Fluid; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Methane; Paleoclimate; WAIS Divide; WAIS Divide Ice Core", "locations": "Antarctica; WAIS Divide", "north": -79.28, "nsf_funding_programs": "Antarctic Glaciology", "persons": "McConnell, Joseph; Brook, Edward J.; Rhodes, Rachel", "project_titles": "Collaborative Research: Completing an ultra-high resolution methane record from the WAIS Divide ice core", "projects": [{"proj_uid": "p0000185", "repository": "USAP-DC", "title": "Collaborative Research: Completing an ultra-high resolution methane record from the WAIS Divide ice core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.28, "title": "Continuous, Ultra-high Resolution WAIS-Divide Ice Core Methane Record 9.8-67.2 ka BP", "uid": "609628", "west": -112.05}, {"awards": "0934534 Sergienko, Olga", "bounds_geometry": ["POLYGON((-75 84,-69.5 84,-64 84,-58.5 84,-53 84,-47.5 84,-42 84,-36.5 84,-31 84,-25.5 84,-20 84,-20 81.6,-20 79.2,-20 76.8,-20 74.4,-20 72,-20 69.6,-20 67.2,-20 64.8,-20 62.4,-20 60,-25.5 60,-31 60,-36.5 60,-42 60,-47.5 60,-53 60,-58.5 60,-64 60,-69.5 60,-75 60,-75 62.4,-75 64.8,-75 67.2,-75 69.6,-75 72,-75 74.4,-75 76.8,-75 79.2,-75 81.6,-75 84))", "POLYGON((-150 -75,-129 -75,-108 -75,-87 -75,-66 -75,-45 -75,-24 -75,-3 -75,18 -75,39 -75,60 -75,60 -76.5,60 -78,60 -79.5,60 -81,60 -82.5,60 -84,60 -85.5,60 -87,60 -88.5,60 -90,39 -90,18 -90,-3 -90,-24 -90,-45 -90,-66 -90,-87 -90,-108 -90,-129 -90,-150 -90,-150 -88.5,-150 -87,-150 -85.5,-150 -84,-150 -82.5,-150 -81,-150 -79.5,-150 -78,-150 -76.5,-150 -75))"], "date_created": "Tue, 07 Jul 2015 00:00:00 GMT", "description": "This data set includes basal shear distributions inferred from surface observations - surface ice velocities (Joughin et al., 2010, Rignot et al., 2011), bed and surface elevations (Fretwell et al., 2013) under ten selected locations in Greenland and Antarctica. In Greenland, the locations were: 79\u00b0 North and Zachariae Glaciers, Jakobshan Isbrae, North East Greenland Ice Stream, Petermann Glacier. The Antarctica locations were Bindschadler Ice Stream, Lambert Ice Stream, MacAyeal Ice Stream, Pine Island Glacier, Thwaites Glacier, and an unnamed location around ~40\u00b0 E 84\u00b0 S.", "east": 60.0, "geometry": ["POINT(-47.5 72)", "POINT(-45 -82.5)"], "keywords": "Antarctica; Arctic; Bindschadler Ice Stream; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Greenland; Lambert Ice Stream; Macayeal Ice Stream; Pine Island Glacier; Thwaites Glacier", "locations": "Antarctica; Thwaites Glacier; Pine Island Glacier; Macayeal Ice Stream; Greenland; Bindschadler Ice Stream; Lambert Ice Stream; Arctic", "north": 84.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Sergienko, Olga", "project_titles": "COLLABORATIVE RESEARCH: Enabling ice sheet sensitivity and stability analysis with a large-scale higher-order ice sheet model\u0027s adjoint to support sea level change assessment", "projects": [{"proj_uid": "p0000048", "repository": "USAP-DC", "title": "COLLABORATIVE RESEARCH: Enabling ice sheet sensitivity and stability analysis with a large-scale higher-order ice sheet model\u0027s adjoint to support sea level change assessment"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Inverted Basal Shear Stress of Antarctic and Greenland Ice Streams and Glaciers", "uid": "609626", "west": -150.0}, {"awards": "0636740 Kreutz, Karl", "bounds_geometry": ["POINT(-112.5 -79.28)"], "date_created": "Mon, 29 Jun 2015 00:00:00 GMT", "description": "This data set includes raw dust microparticle data for the WAIS Divide deep core, WDC06A, from the surface to 577 m. Data were collected in 2010 using a Klotz Abakus laser particle counter connected to a continuous ice core melter system at the University of Maine (Breton et al., 2012).", "east": -112.5, "geometry": ["POINT(-112.5 -79.28)"], "keywords": "Antarctica; Dust; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Paleoclimate; Particle Size; WAIS Divide; WAIS Divide Ice Core", "locations": "Antarctica; WAIS Divide", "north": -79.28, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Koffman, Bess; Kreutz, Karl", "project_titles": "Collaborative Research: Microparticle/tephra analysis of the WAIS Divide ice core", "projects": [{"proj_uid": "p0000040", "repository": "USAP-DC", "title": "Collaborative Research: Microparticle/tephra analysis of the WAIS Divide ice core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.28, "title": "WAIS Divide Microparticle Concentration and Size Distribution, 0-2400 ka", "uid": "609616", "west": -112.5}, {"awards": "0440701 Severinghaus, Jeffrey", "bounds_geometry": ["POINT(-112.125 -79.463)"], "date_created": "Mon, 08 Jun 2015 00:00:00 GMT", "description": "This data set shows the modeled surface temperature reconstruction from an inversion of the 300 m WDC05A borehole at the West Antarctic Divide Ice core site.", "east": -112.125, "geometry": ["POINT(-112.125 -79.463)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Temperature; WAIS Divide; WAIS Divide Ice Core", "locations": "WAIS Divide; Antarctica", "north": -79.463, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Severinghaus, Jeffrey P.; Orsi, Anais J.", "project_titles": "Collaborative Research: Gases in Firn Air and Shallow Ice at the Proposed WAIS Divide Drilling Site", "projects": [{"proj_uid": "p0000368", "repository": "USAP-DC", "title": "Collaborative Research: Gases in Firn Air and Shallow Ice at the Proposed WAIS Divide Drilling Site"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.463, "title": "Surface Temperature Reconstruction from Borehole Temperature Measurement in WDC05A", "uid": "609638", "west": -112.125}, {"awards": "0538657 Severinghaus, Jeffrey", "bounds_geometry": ["POINT(-112.125 -79.463)"], "date_created": "Mon, 08 Jun 2015 00:00:00 GMT", "description": "This data set includes borehole temperature measurements performed in January 2008 and January 2009 at the West Antarctic Ice sheet divide from the 300 m hole WDC05A.", "east": -112.125, "geometry": ["POINT(-112.125 -79.463)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Temperature; WAIS Divide; WAIS Divide Ice Core", "locations": "Antarctica; WAIS Divide", "north": -79.463, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Severinghaus, Jeffrey P.; Orsi, Anais J.", "project_titles": "Nitrogen and Oxygen Gas Isotopes in the WAIS Divide Ice Core as Constraints on Chronology, Temperature, and Accumulation Rate", "projects": [{"proj_uid": "p0000036", "repository": "USAP-DC", "title": "Nitrogen and Oxygen Gas Isotopes in the WAIS Divide Ice Core as Constraints on Chronology, Temperature, and Accumulation Rate"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.463, "title": "Borehole Temperature Measurement in WDC05A in January 2008 and January 2009", "uid": "609637", "west": -112.125}, {"awards": "0636740 Kreutz, Karl", "bounds_geometry": ["POINT(-112.05 -79.28)"], "date_created": "Mon, 01 Jun 2015 00:00:00 GMT", "description": "Measurements of a suite of trace elements in snow pit samples from WAIS Divide, Antarctica.", "east": -112.05, "geometry": ["POINT(-112.05 -79.28)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Trace Elements; WAIS Divide; WAIS Divide Ice Core", "locations": "Antarctica; WAIS Divide", "north": -79.28, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Kreutz, Karl", "project_titles": "Collaborative Research: Microparticle/tephra analysis of the WAIS Divide ice core", "projects": [{"proj_uid": "p0000040", "repository": "USAP-DC", "title": "Collaborative Research: Microparticle/tephra analysis of the WAIS Divide ice core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.28, "title": "Snowpit Chemistry - Methods Comparison, WAIS Divide, Antarctica", "uid": "609620", "west": -112.05}, {"awards": "1043154 Tyler, Scott; 1043395 Holland, David; 1043217 Zagorodnov, Victor", "bounds_geometry": ["POINT(167.5333 -77.76667)"], "date_created": "Tue, 05 May 2015 00:00:00 GMT", "description": "Fiber-optic equipped moorings for Raman backscatter Distributed Temperature Sensing (DTS) were installed at Windless Bight, Antarctica in November 2011. Continuous-in-space measurements of temperature were recorded every meter along the mooring.", "east": 167.5333, "geometry": ["POINT(167.5333 -77.76667)"], "keywords": "Antarctica; Ice Shelf; McMurdo Sound; Mooring; Oceans; Physical Oceanography; Ross Ice Shelf; Southern Ocean", "locations": "Antarctica; Ross Ice Shelf; McMurdo Sound; Southern Ocean", "north": -77.76667, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Holland, David; Tyler, Scott W.; Zagorodnov, Victor", "project_titles": "Collaborative Research: Application of Distributed Temperature Sensors (DTS) for Antarctic Ice Shelves and Cavities", "projects": [{"proj_uid": "p0000183", "repository": "USAP-DC", "title": "Collaborative Research: Application of Distributed Temperature Sensors (DTS) for Antarctic Ice Shelves and Cavities"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.76667, "title": "Fiber-Optic Distributed Temperature Sensing at Windless Bight", "uid": "609604", "west": 167.5333}, {"awards": "1043092 Steig, Eric", "bounds_geometry": ["POINT(-112.05 -79.28)"], "date_created": "Tue, 28 Apr 2015 00:00:00 GMT", "description": "This data set contains complete low resolution (0.25 to 100 cm) oxygen isotope data from the WAIS Divide Ice Core WDC06A, 0 to 3404.7 m depth. Also included is the WDC2014 timescale.", "east": -112.05, "geometry": ["POINT(-112.05 -79.28)"], "keywords": "Antarctica; Chemistry:fluid; Chemistry:Fluid; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Isotope; Paleoclimate; WAIS Divide; WAIS Divide Ice Core", "locations": "Antarctica; WAIS Divide", "north": -79.28, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Steig, Eric J.", "project_titles": "Collaborative Research: Stable Isotopes of Ice in the Transition and Glacial Sections of the WAIS Divide Deep Ice Core", "projects": [{"proj_uid": "p0000010", "repository": "USAP-DC", "title": "Collaborative Research: Stable Isotopes of Ice in the Transition and Glacial Sections of the WAIS Divide Deep Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.28, "title": "WAIS Divide WDC06A Oxygen Isotope Record", "uid": "609629", "west": -112.05}, {"awards": "0229314 Stone, John", "bounds_geometry": ["POLYGON((-136.32 -85.38,-135.136 -85.38,-133.952 -85.38,-132.768 -85.38,-131.584 -85.38,-130.4 -85.38,-129.216 -85.38,-128.032 -85.38,-126.848 -85.38,-125.664 -85.38,-124.48 -85.38,-124.48 -85.493,-124.48 -85.606,-124.48 -85.719,-124.48 -85.832,-124.48 -85.945,-124.48 -86.058,-124.48 -86.171,-124.48 -86.284,-124.48 -86.397,-124.48 -86.51,-125.664 -86.51,-126.848 -86.51,-128.032 -86.51,-129.216 -86.51,-130.4 -86.51,-131.584 -86.51,-132.768 -86.51,-133.952 -86.51,-135.136 -86.51,-136.32 -86.51,-136.32 -86.397,-136.32 -86.284,-136.32 -86.171,-136.32 -86.058,-136.32 -85.945,-136.32 -85.832,-136.32 -85.719,-136.32 -85.606,-136.32 -85.493,-136.32 -85.38))"], "date_created": "Mon, 30 Mar 2015 00:00:00 GMT", "description": "This data set contains site, sample, and analytical data from which to calculate cosmogenic nuclide-based exposure ages for glacial deposits adjacent to Reedy Glacier, Antarctica. The data are formatted as input for the CRONUS online exposure-age calculator (http://www.hess.ess.edu/), which determines the exposure age from the cosmogenic Beryllium-10 and Aluminum-26 production rates.", "east": -124.48, "geometry": ["POINT(-130.4 -85.945)"], "keywords": "Antarctica; Chemistry:rock; Chemistry:Rock; Cosmogenic; Geochemistry; Geochronology; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Reedy Glacier; Sample/collection Description; Sample/Collection Description", "locations": "Reedy Glacier; Antarctica", "north": -85.38, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Stone, John", "project_titles": "Collaborative Research: Late Quaternary History of Reedy Glacier", "projects": [{"proj_uid": "p0000029", "repository": "USAP-DC", "title": "Collaborative Research: Late Quaternary History of Reedy Glacier"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -86.51, "title": "Reedy Glacier Exposure Ages, Antarctica", "uid": "609601", "west": -136.32}, {"awards": "0944078 Albert, Mary", "bounds_geometry": ["POINT(124.48796 -80.77914)", "POINT(-112.12317 -79.463)"], "date_created": "Wed, 11 Mar 2015 00:00:00 GMT", "description": "This data set contains laboratory measurements of the density and permeability made from firn cores from the lock-in zone through pore close-off at the WAIS Divide and Megadunes sites.", "east": 124.48796, "geometry": ["POINT(124.48796 -80.77914)", "POINT(-112.12317 -79.463)"], "keywords": "Antarctica; Firn; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Physical Properties; WAIS Divide; WAIS Divide Ice Core", "locations": "WAIS Divide; Antarctica", "north": -79.463, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Albert, Mary R.", "project_titles": "Firn Metamorphism: Microstructure and Physical Properties", "projects": [{"proj_uid": "p0000049", "repository": "USAP-DC", "title": "Firn Metamorphism: Microstructure and Physical Properties"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -80.77914, "title": "Firn Permeability and Density at WAIS Divide", "uid": "609602", "west": -112.12317}, {"awards": "1043313 Spencer, Matthew", "bounds_geometry": ["POINT(-112.0865 -79.4676)"], "date_created": "Wed, 11 Mar 2015 00:00:00 GMT", "description": "This data set includes \u0026#126;50 m averaged annual layer thicknesses down to 3403 m depth at the West Antarctic Ice Sheet (WAIS) Divide ice core as observed visually using diffuse transmitted light opposite a planed surface in a light-shielded booth in the core-processing line at the National Ice Core Lab in Denver, CO.", "east": -112.0865, "geometry": ["POINT(-112.0865 -79.4676)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; WAIS Divide; WAIS Divide Ice Core", "locations": "Antarctica; WAIS Divide", "north": -79.4676, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Spencer, Matthew", "project_titles": "Collaborative Research: Continued Study of Physical Properties of the WAIS Divide Deep Core", "projects": [{"proj_uid": "p0000027", "repository": "USAP-DC", "title": "Collaborative Research: Continued Study of Physical Properties of the WAIS Divide Deep Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.4676, "title": "Average Annual Layer Thickness of the WAIS Divide Ice Core from Visual Stratigraphy", "uid": "609603", "west": -112.0865}, {"awards": "1043528 Alley, Richard", "bounds_geometry": ["POINT(-112.085 -79.467)"], "date_created": "Tue, 10 Mar 2015 00:00:00 GMT", "description": "This data set contains c-axis fabric measurements and grain area from the physical properties samples taken from the main West Antarctic Ice Sheet\u00a0(WAIS) Divide ice core, WDC06A , Antarctica.", "east": -112.085, "geometry": ["POINT(-112.085 -79.467)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Physical Properties; WAIS Divide; WAIS Divide Ice Core", "locations": "Antarctica; WAIS Divide", "north": -79.467, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Voigt, Donald E.; Alley, Richard; Fitzpatrick, Joan", "project_titles": "Collaborative Research: Continued Study of Physical Properties of the WAIS Divide Deep Core", "projects": [{"proj_uid": "p0000027", "repository": "USAP-DC", "title": "Collaborative Research: Continued Study of Physical Properties of the WAIS Divide Deep Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.467, "title": "C-axis Fabric from Physical Properties Samples of the WAIS Divide Ice Core", "uid": "609605", "west": -112.085}, {"awards": "0944659 Kiene, Ronald", "bounds_geometry": ["POLYGON((-160 -68,-159 -68,-158 -68,-157 -68,-156 -68,-155 -68,-154 -68,-153 -68,-152 -68,-151 -68,-150 -68,-150 -69,-150 -70,-150 -71,-150 -72,-150 -73,-150 -74,-150 -75,-150 -76,-150 -77,-150 -78,-151 -78,-152 -78,-153 -78,-154 -78,-155 -78,-156 -78,-157 -78,-158 -78,-159 -78,-160 -78,-160 -77,-160 -76,-160 -75,-160 -74,-160 -73,-160 -72,-160 -71,-160 -70,-160 -69,-160 -68))"], "date_created": "Thu, 01 Jan 2015 00:00:00 GMT", "description": "Spectacular blooms of Phaeocystis antarctica in the Ross Sea, Antarctica are the source of some of the world\u0027s highest concentrations of dimethylsulfoniopropionate (DMSP) and its volatile degradation product, dimethylsulfide (DMS). The flux of DMS from the oceans to the atmosphere in this region and its subsequent gas phase oxidation generates aerosols that have a strong influence on cloud properties and possibly climate. In the oceans, DMS and DMSP are quantitatively significant components of the carbon, sulfur, and energy flows in marine food webs, especially in the Ross Sea. Despite its central role in carbon and sulfur biogeochemistry in the Ross Sea, surprisingly little is known about the physiological functions of DMSP in P. Antarctica. The research will isolate and characterize DMSP lyases from P. antarctica, with the goal of obtaining amino acid and gene sequence information on these important enzymes. The physiological studies will focus on the effects of varying intensities of photosynthetically active radiation, with and without ultraviolet radiation as these are factors that we have found to be important controls on DMSP and DMS dynamics. The research also will examine the effects of prolonged darkness on the dynamics of DMSP and related compounds in P. antarctica, as survival of this species during the dark Antarctic winter and at sub-euphotic depths appears to be an important part of the Phaeocystis? ecology. A unique aspect of this work is the focus on measurements of intracellular MSA, which if detected, would provide strong evidence for in vivo radical scavenging functions for methyl sulfur compounds. The study will advance understanding of what controls DMSP cycling and ultimately DMS emissions from the Ross Sea and also provide information on what makes P. antarctica so successful in this extreme environment. The research will directly benefit and build on several interrelated ocean-atmosphere programs including the International Surface Ocean Lower Atmosphere Study (SOLAS) program. The PIs will participate in several activities involving K-12 education, High School teacher training, public education and podcasting through the auspices of the Dauphin Island Sea Lab Discovery Hall program and SUNY ESF. Two graduate students will be employed full time, and six undergraduates (2 each summer) will be trained as part of this project.\n", "east": -150.0, "geometry": ["POINT(-155 -73)"], "keywords": "Antarctica; Biota; Chemistry:fluid; Chemistry:Fluid; Geochemistry; Oceans; Ross Sea", "locations": "Ross Sea; Antarctica", "north": -68.0, "nsf_funding_programs": null, "persons": "Kiene, Ronald", "project_titles": "Collaborative Research: Ecophysiology of DMSP and related compounds and their contributions to carbon and sulfur dynamics in Phaeocystis antarctica", "projects": [{"proj_uid": "p0000085", "repository": "USAP-DC", "title": "Collaborative Research: Ecophysiology of DMSP and related compounds and their contributions to carbon and sulfur dynamics in Phaeocystis antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Ecophysiology of DMSP and related compounds and their contributions to carbon and sulfur dynamics in Phaeocystis antarctica", "uid": "600150", "west": -160.0}, {"awards": "0944653 Forster, Richard", "bounds_geometry": ["POLYGON((-119.4 -78.1,-118.46 -78.1,-117.52 -78.1,-116.58 -78.1,-115.64 -78.1,-114.7 -78.1,-113.76 -78.1,-112.82 -78.1,-111.88 -78.1,-110.94 -78.1,-110 -78.1,-110 -78.29,-110 -78.48,-110 -78.67,-110 -78.86,-110 -79.05,-110 -79.24,-110 -79.43,-110 -79.62,-110 -79.81,-110 -80,-110.94 -80,-111.88 -80,-112.82 -80,-113.76 -80,-114.7 -80,-115.64 -80,-116.58 -80,-117.52 -80,-118.46 -80,-119.4 -80,-119.4 -79.81,-119.4 -79.62,-119.4 -79.43,-119.4 -79.24,-119.4 -79.05,-119.4 -78.86,-119.4 -78.67,-119.4 -78.48,-119.4 -78.29,-119.4 -78.1))"], "date_created": "Thu, 01 Jan 2015 00:00:00 GMT", "description": "This award supports a project to broaden the knowledge of annual accumulation patterns over the West Antarctic Ice Sheet by processing existing near-surface radar data taken on the US ITASE traverse in 2000 and by gathering and validating new ultra/super-high-frequency (UHF) radar images of near surface layers (to depths of ~15 m), expanding abilities to monitor recent annual accumulation patterns from point source ice cores to radar lines. Shallow (15 m) ice cores will be collected in conjunction with UHF radar images to confirm that radar echoed returns correspond with annual layers, and/or sub-annual density changes in the near-surface snow, as determined from ice core stable isotopes. This project will additionally improve accumulation monitoring from space-borne instruments by comparing the spatial-radar-derived-annual accumulation time series to the passive microwave time series dating back over 3 decades and covering most of Antarctica. The intellectual merit of this project is that mapping the spatial and temporal variations in accumulation rates over the Antarctic ice sheet is essential for understanding ice sheet responses to climate forcing. Antarctic precipitation rate is projected to increase up to 20% in the coming century from the predicted warming. Accumulation is a key component for determining ice sheet mass balance and, hence, sea level rise, yet our ability to measure annual accumulation variability over the past 5 decades (satellite era) is mostly limited to point-source ice cores. Developing a radar and ice core derived annual accumulation dataset will provide validation data for space-born remote sensing algorithms, climate models and, additionally, establish accumulation trends. The broader impacts of the project are that it will advance discovery and understanding within the climatology, glaciology and remote sensing communities by verifying the use of UHF radars to monitor annual layers as determined by visual, chemical and isotopic analysis from corresponding shallow ice cores and will provide a dataset of annual to near-annual accumulation measurements over the past ~5 decades across WAIS divide from existing radar data and proposed radar data. By determining if temporal changes in the passive microwave signal are correlated with temporal changes in accumulation will help assess the utility of passive microwave remote sensing to monitor accumulation rates over ice sheets for future decades. The project will promote teaching, training and learning, and increase representation of underrepresented groups by becoming involved in the NASA History of Winter project and Thermochron Mission and by providing K-12 teachers with training to monitor snow accumulation and temperature here in the US, linking polar research to the student\u0027s backyard. The project will train both undergraduate and graduate students in polar research and will encouraging young investigators to become involved in careers in science. In particular, two REU students will participate in original research projects as part of this larger project, from development of a hypothesis to presentation and publication of the results. The support of a new, young woman scientist will help to increase gender diversity in polar research.\n", "east": -110.0, "geometry": ["POINT(-114.7 -79.05)"], "keywords": "Airborne Radar; Antarctica; Geology/Geophysics - Other; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Radar; WAIS Divide; WAIS Divide Ice Core", "locations": "Antarctica; WAIS Divide", "north": -78.1, "nsf_funding_programs": null, "persons": "Forster, Richard", "project_titles": "Collaborative Research: Annual satellite era accumulation patterns over WAIS Divide: A study using shallow ice cores, near-surface radars and satellites", "projects": [{"proj_uid": "p0000079", "repository": "USAP-DC", "title": "Collaborative Research: Annual satellite era accumulation patterns over WAIS Divide: A study using shallow ice cores, near-surface radars and satellites"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -80.0, "title": "Annual Satellite Era Accumulation Patterns Over WAIS Divide: A Study Using Shallow Ice Cores, Near-Surface Radars and Satellites", "uid": "600146", "west": -119.4}, {"awards": "0739575 Emslie, Steven", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Thu, 01 Jan 2015 00:00:00 GMT", "description": "The research combines interdisciplinary study in geology, paleontology, and biology, using stable isotope and radiocarbon analyses, to examine how climate change and resource utilization have influenced population distribution, movement, and diet in penguins during the mid-to-late Holocene. Previous investigations have demonstrated that abandoned colonies contain well-preserved remains that can be used to examine differential responses of penguins to climate change in various sectors of Antarctica. As such, the research team will investigate abandoned and active pygoscelid penguin (Adelie, Chinstrap, and Gentoo) colonies in the Antarctic Peninsula and Ross Sea regions, and possibly Prydz Bay, in collaboration with Chinese scientists during four field seasons. Stable isotope analyses will be conducted on recovered penguin tissues and prey remains in guano to address hypotheses on penguin occupation history, population movement, and diet in relation to climate change since the late Pleistocene. The study will include one Ph.D., two Masters and 16 undergraduate students in advanced research over the project period. Students will be exposed to a variety of fields, the scientific method, and international scientific research. They will complete field and lab research for individual projects or Honor\u0027s theses for academic credit. The project also will include web-based outreach, lectures to middle school students, and the development of interactive exercises that highlight hypothesis-driven research and the ecology of Antarctica. Two undergraduate students in French and Spanish languages at UNCW will be hired to assist in translating the Web page postings for broader access to this information.\n", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Antarctic Peninsula; Biota; Geochronology; Global; Penguin; Ross Sea; Sample/collection Description; Sample/Collection Description; Scotia Sea; Southern Ocean", "locations": "Antarctic Peninsula; Antarctica; Scotia Sea; Ross Sea; Global; Southern Ocean", "north": -60.0, "nsf_funding_programs": null, "persons": "Patterson, William; Polito, Michael; Emslie, Steven D.", "project_titles": "Stable Isotope Analyses of Pygoscelid Penguin remains from Active and Abandoned Colonies in Antarctica", "projects": [{"proj_uid": "p0000317", "repository": "USAP-DC", "title": "Stable Isotope Analyses of Pygoscelid Penguin remains from Active and Abandoned Colonies in Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Stable Isotope Analyses of Pygoscelid Penguin remains from Active and Abandoned Colonies in Antarctica", "uid": "600145", "west": -180.0}, {"awards": "1146399 Sidor, Christian", "bounds_geometry": ["POLYGON((162.41 -84.27,163.409 -84.27,164.408 -84.27,165.407 -84.27,166.406 -84.27,167.405 -84.27,168.404 -84.27,169.403 -84.27,170.402 -84.27,171.401 -84.27,172.4 -84.27,172.4 -84.353,172.4 -84.436,172.4 -84.519,172.4 -84.602,172.4 -84.685,172.4 -84.768,172.4 -84.851,172.4 -84.934,172.4 -85.017,172.4 -85.1,171.401 -85.1,170.402 -85.1,169.403 -85.1,168.404 -85.1,167.405 -85.1,166.406 -85.1,165.407 -85.1,164.408 -85.1,163.409 -85.1,162.41 -85.1,162.41 -85.017,162.41 -84.934,162.41 -84.851,162.41 -84.768,162.41 -84.685,162.41 -84.602,162.41 -84.519,162.41 -84.436,162.41 -84.353,162.41 -84.27))"], "date_created": "Thu, 01 Jan 2015 00:00:00 GMT", "description": "The PI requests support for preparation of a large collection of vertebrate fossils recently recovered from the Central Transantarctic Mountains (CTAM) of Antarctica. These fossils will be used to place early Mesozoic Antarctic dinosaurs and other vertebrates into a global evolutionary, biogeographic, and faunal context; assess the degree of endemism in Triassic vertebrate faunas of Antarctica; constrain temporal relationships of the Triassic Antarctic vertebrate faunas; and refine the stratigraphic context for the Triassic Antarctic vertebrate assemblages to establish a paleoenvironmental framework. The lower and middle Triassic fossils offer a rare window on life in terrestrial environments at high-latitudes immediately after the Permian mass extinction.\n\nThe PI will use their fossils to educate the public about the geologic, climatic, and biologic history of Antarctica by visiting local schools. They will create and publish at least two new videos to the Burke Museum blog that relate the graduate student\u0027s experience of fieldwork in Antarctica. They will also update the Antarctica section on the UWBM \u0027Explore Your World\u0027 website with images and findings from their field season.\n", "east": 172.4, "geometry": ["POINT(167.405 -84.685)"], "keywords": "Antarctica; Biota; Fossil; Paleoclimate; Sample/collection Description; Sample/Collection Description; Solid Earth; Transantarctic Mountains; Triassic", "locations": "Antarctica; Transantarctic Mountains", "north": -84.27, "nsf_funding_programs": null, "persons": "Sidor, Christian", "project_titles": "Preparation of Vertebrate Fossils from the Triassic of Antarctica", "projects": [{"proj_uid": "p0000418", "repository": "USAP-DC", "title": "Preparation of Vertebrate Fossils from the Triassic of Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -85.1, "title": "Preparation of Vertebrate Fossils from the Triassic of Antarctica", "uid": "600144", "west": 162.41}, {"awards": "1343649 Levy, Joseph", "bounds_geometry": ["POLYGON((162.852 -77.6111,162.9893 -77.6111,163.1266 -77.6111,163.2639 -77.6111,163.4012 -77.6111,163.5385 -77.6111,163.6758 -77.6111,163.8131 -77.6111,163.9504 -77.6111,164.0877 -77.6111,164.225 -77.6111,164.225 -77.65331,164.225 -77.69552,164.225 -77.73773,164.225 -77.77994,164.225 -77.82215,164.225 -77.86436,164.225 -77.90657,164.225 -77.94878,164.225 -77.99099,164.225 -78.0332,164.0877 -78.0332,163.9504 -78.0332,163.8131 -78.0332,163.6758 -78.0332,163.5385 -78.0332,163.4012 -78.0332,163.2639 -78.0332,163.1266 -78.0332,162.9893 -78.0332,162.852 -78.0332,162.852 -77.99099,162.852 -77.94878,162.852 -77.90657,162.852 -77.86436,162.852 -77.82215,162.852 -77.77994,162.852 -77.73773,162.852 -77.69552,162.852 -77.65331,162.852 -77.6111))"], "date_created": "Thu, 01 Jan 2015 00:00:00 GMT", "description": "The PIs propose to quantify the hillslope water, solute, and carbon budgets for Taylor Valley in the McMurdo Dry Valleys, using water tracks to investigate near-surface geological processes and challenge the paradigm that shallow groundwater is minimal or non-exixtant. Water tracks are linear zones of high soil moisture that route shallow groundwater downslope in permafrost dominated soils. Four hypotheses will be tested: 1) water tracks are important pathways for water and solute transport; 2) water tracks transport more dissolved silica than streams in Taylor Valley indicating they are the primary site of chemical weathering for cold desert soils and bedrock; 3) water tracks that drain highland terrains are dominated by humidity-separated brines while water tracks that drain lowland terrains are dominated by marine aerosols; 4) water tracks are the sites of the highest terrestrial soil carbon concentrations and the strongest CO2 fluxes in Taylor Valley and their carbon content increases with soil age, while carbon flux decreases with age. To test these hypotheses the PIs will carry out a suite of field measurements supported by modeling and remote sensing. They will install shallow permafrost wells in water tracks that span the range of geological, climatological, and topographic conditions in Taylor Valley. Multifrequency electromagnetic induction sounding of the upper ~1 m of the permafrost will create the first comprehensive map of soil moisture in Taylor Valley, and will permit direct quantification of water track discharge across the valley. The carbon contents of water track soils will be measured and linked to global carbon dynamics.\n\nNon-science majors at Oregon State University will be integrated into the proposed research through a new Global Environmental Change course focusing on the scientific method in Antarctica. Three undergraduate students, members of underrepresented minorities, will be entrained in the research, will contribute to all aspects of field and laboratory science, and will present results at national meetings.\n", "east": 164.225, "geometry": ["POINT(163.5385 -77.82215)"], "keywords": "Antarctica; Chemistry:soil; Chemistry:Soil; Critical Zone; Dry Valleys; Permafrost; Sample/collection Description; Sample/Collection Description; Well Measurements", "locations": "Dry Valleys; Antarctica", "north": -77.6111, "nsf_funding_programs": null, "persons": "Levy, Joseph", "project_titles": "Cryptic Hydrology of the McMurdo Dry Valleys: Water Track Contributions to Water and Geochemical Budgets in Taylor Valley, Antarctica", "projects": [{"proj_uid": "p0000407", "repository": "USAP-DC", "title": "Cryptic Hydrology of the McMurdo Dry Valleys: Water Track Contributions to Water and Geochemical Budgets in Taylor Valley, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0332, "title": "Cryptic Hydrology of the McMurdo Dry Valleys: Water Track Contributions to Water and Geochemical Budgets in Taylor Valley, Antarctica", "uid": "600139", "west": 162.852}, {"awards": "1332492 Lohmann, Rainer", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Thu, 01 Jan 2015 00:00:00 GMT", "description": "Many persistent organic pollutants (POPs), though banned in the U.S. since the 1970s, remain in the environment and continue to reach hitherto pristine regions such as the Arctic and Antarctic. The overall goals of this RAPID project are to better understand the remobilization of POPs from melting glaciers in the Antarctic, and their transfer into the food-web. Legacy POPs have characteristic chemical signatures that will be used ascertain the origin of POPs in the Antarctic atmosphere and marine food-web. Samples that were collected in 2010 will be analyzed for a wide range of legacy POPs, and their behavior will be contrasted with results for emerging contaminants. The intellectual merit of the proposed research combines (a) the use of chemical signatures to assess whether melting glaciers are releasing legacy POPs back into the Antarctic marine ecosystem, and (b) a better understanding of the food-web dynamics of legacy POPs versus emerging organic pollutants.\n\nThe broader impacts of the proposed research project will include the training of the next generation of scientists through support for a graduate student and a postdoctoral scholar. As well, this work will result in a better understanding of the relationship between pollutants, trophic food web ecology and global climate change in the pristine Antarctic ecosystem.\n", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Animal Tracking; Antarctica; Antarctic Peninsula; Atmosphere; Biota; Chemistry:fluid; Chemistry:Fluid; Human Dimensions; McMurdo Sound; Oceans; Palmer Station; Pollution; Ross Sea; Sample/collection Description; Sample/Collection Description; Seals; Southern Ocean; Weddell Sea", "locations": "Southern Ocean; Weddell Sea; Antarctica; Ross Sea; Palmer Station; McMurdo Sound; Antarctic Peninsula", "north": -60.0, "nsf_funding_programs": null, "persons": "Lohmann, Rainer", "project_titles": "RAPID: Origin of Persistent Organic Pollutants in the Antarctic Atmosphere, Snow and Marine Food WEB", "projects": [{"proj_uid": "p0000344", "repository": "USAP-DC", "title": "RAPID: Origin of Persistent Organic Pollutants in the Antarctic Atmosphere, Snow and Marine Food WEB"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Origin of Persistent Organic Pollutants in the Antarctic Atmosphere, Snow and Marine Food Web", "uid": "600138", "west": -180.0}, {"awards": "1321782 Costa, Daniel", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Thu, 01 Jan 2015 00:00:00 GMT", "description": "Identifying the basic habitat requirements of Antarctic predators is fundamental to understanding how they will respond to the human-induced challenges of commercial fisheries and climate change. This understanding can only be achieved if the underlying linkages to physical processes are related to animal movements. As part of the international Retrospective Analysis of Antarctic Tracking Data (RAATD) organized by the SCAR Expert Group of Birds and Marine Mammals, this research will collate and synthesize tracking data from crabeater seals, Lobodon carcinophagus, and Weddell seals, Leptonychotes weddelli. These data will be combined with all available data from the Southern Ocean that has been collected by researchers from Norway, United Kingdom, Germany, Australia and the USA. These data will be analyzed using a common analytical approach and synthesized into a synoptic view of these two species across the Southern Ocean. The diving and movement patterns will be examined for each species. As well, the total home range and core habitat utilization patterns for each species and region will be determined. This study will develop global habitat maps for each species based on physical and biological attributes of their \u0027hot-spots\u0027 and then overlay all the species specific maps to identify multi-species areas of ecological significance. Broader impacts include support and training for a postdoctoral scholar, the production of a publicly available database and the participation in an international data synthesis effort.\n", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Animal Tracking; Antarctica; Biota; Oceans; Sample/collection Description; Sample/Collection Description; Seals; Southern Ocean", "locations": "Southern Ocean; Antarctica", "north": -60.0, "nsf_funding_programs": null, "persons": "Costa, Daniel", "project_titles": "Retrospective Analysis of Antarctic Tracking data (RAATD): International Crabeater and Weddell Seal Tracking Data Sets", "projects": [{"proj_uid": "p0000346", "repository": "USAP-DC", "title": "Retrospective Analysis of Antarctic Tracking data (RAATD): International Crabeater and Weddell Seal Tracking Data Sets"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Retrospective Analysis of Antarctic Tracking data (RAATD): International Crabeater and Weddell Seal Tracking Data Sets", "uid": "600137", "west": -180.0}, {"awards": "1303896 Kirschvink, Joseph", "bounds_geometry": ["POLYGON((-57 -63,-56.9 -63,-56.8 -63,-56.7 -63,-56.6 -63,-56.5 -63,-56.4 -63,-56.3 -63,-56.2 -63,-56.1 -63,-56 -63,-56 -63.2,-56 -63.4,-56 -63.6,-56 -63.8,-56 -64,-56 -64.2,-56 -64.4,-56 -64.6,-56 -64.8,-56 -65,-56.1 -65,-56.2 -65,-56.3 -65,-56.4 -65,-56.5 -65,-56.6 -65,-56.7 -65,-56.8 -65,-56.9 -65,-57 -65,-57 -64.8,-57 -64.6,-57 -64.4,-57 -64.2,-57 -64,-57 -63.8,-57 -63.6,-57 -63.4,-57 -63.2,-57 -63))"], "date_created": "Thu, 01 Jan 2015 00:00:00 GMT", "description": "The PI will collect samples to extend the magneto-stratigraphic record of late Cretaceous sediments of the James Ross Basin, Antarctica. RAPID support will allow him to take advantage of an invitation from the Instituto Antartico Argentino (IAA) to participate on an excursion to James Ross Island in the Antarctic Peninsula. The PI hopes to collect samples that will refine the position of several geomagnetic reversals between the end of the Cretaceous long normal Chron and the lower portion of Chron 31R. The Brandy Bay locality targeted by this expedition is the best place in the basin for calibrating the biostratigraphic position of the top of the Cretaceous Long Normal Chron, which is one of the most reliable correlation horizons in the entire Geological Time Scale.\n\nThe top of the Cretaceous long normal Chron is not properly correlated to southern hemisphere biostratigraphy. Locating this event will be a major addition to understanding geological time. This expedition will provide opportunities for an undergraduate student. This project is based on a productive collaboration with an Argentine scientist.", "east": -56.0, "geometry": ["POINT(-56.5 -64)"], "keywords": "Antarctica; GPS; James Ross Basin; Sample/collection Description; Sample/Collection Description; Solid Earth", "locations": "Antarctica; James Ross Basin", "north": -63.0, "nsf_funding_programs": null, "persons": "Kirschvink, Joseph", "project_titles": "Magnetostratigraphy of Cretaceous Sediments in the James Ross Island Basin, Antarctica", "projects": [{"proj_uid": "p0000419", "repository": "USAP-DC", "title": "Magnetostratigraphy of Cretaceous Sediments in the James Ross Island Basin, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.0, "title": "Magnetostratigraphy of Cretaceous Sediments in the James Ross Island Basin, Antarctica", "uid": "600136", "west": -57.0}, {"awards": "1142156 Marschall, Horst", "bounds_geometry": ["POLYGON((-6.44 -71.93,-5.378 -71.93,-4.316 -71.93,-3.254 -71.93,-2.192 -71.93,-1.13 -71.93,-0.068 -71.93,0.994 -71.93,2.056 -71.93,3.118 -71.93,4.18 -71.93,4.18 -71.998,4.18 -72.066,4.18 -72.134,4.18 -72.202,4.18 -72.27,4.18 -72.338,4.18 -72.406,4.18 -72.474,4.18 -72.542,4.18 -72.61,3.118 -72.61,2.056 -72.61,0.994 -72.61,-0.068 -72.61,-1.13 -72.61,-2.192 -72.61,-3.254 -72.61,-4.316 -72.61,-5.378 -72.61,-6.44 -72.61,-6.44 -72.542,-6.44 -72.474,-6.44 -72.406,-6.44 -72.338,-6.44 -72.27,-6.44 -72.202,-6.44 -72.134,-6.44 -72.066,-6.44 -71.998,-6.44 -71.93))"], "date_created": "Thu, 01 Jan 2015 00:00:00 GMT", "description": "Geochemical studies of single mineral grains in rocks can be probed to reconstruct the history of our planet. The mineral zircon (ZrSiO4) is of unique importance in that respect because of its reliability as a geologic clock due to its strong persistence against weathering, transport and changes in temperature and pressure. Uranium-Lead (U-Pb) dating of zircon grains is, perhaps, the most frequently employed method of extracting time information on geologic processes that shaped the continental crust, and has been used to constrain the evolution of continents and mountain belts through time. In addition, the isotopic composition of the element Hafnium (Hf) in zircon is used to date when the continental crust was generated by extraction of magma from the underlying mantle. Melting of rocks in the mantle and deep in the continental crust are key processes in the evolution of the continents, and they are recorded in the Hf isotopic signatures of zircon. Although the analytical procedures for U-Pb dating and Hf isotope analyses of zircon are robust now, our understanding of zircon growth and its exchange of elements and isotopes with its surrounding rock or magma are still underdeveloped. The focus of the proposed study, therefore, is to unravel the evolution of zircon Hf isotopes in rocks that were formed deep in the Earth\u0027s crust, and more specifically, to apply these isotopic methods to rocks collected in Dronning Maud Land (DML), East Antarctica.\n\nDronning Maud Land (DML) occupied a central location during the formation of supercontinents - large landmasses made up of all the continents that exist today - more than 500 million years ago. It is currently thought that supercontinents were formed and dismembered five or six times throughout Earth\u0027s history. The area of DML is key for understanding the formation history of the last two supercontinents. The boundaries of continents that were merged to form those supercontinents are most likely hidden in DML. In this study, the isotopic composition of zircon grains recovered from DML rocks will be employed to identify these boundaries across an extensive section through the area. The rock samples were collected by the investigator during a two-month expedition to Antarctica in the austral summer of 2007-2008. The results of dating and isotope analyses of zircon of the different DML crustal domains will deliver significant insight into the regional geology of East Antarctica and its previous northern extension into Africa. This has significance for the reconstruction of the supercontinents and defining the continental boundaries in DML.\n", "east": 4.18, "geometry": ["POINT(-1.13 -72.27)"], "keywords": "Antarctica; Chemistry:rock; Chemistry:Rock; Dronning Maud Land; Geochemistry; Geochronology; Solid Earth", "locations": "Dronning Maud Land; Antarctica", "north": -71.93, "nsf_funding_programs": null, "persons": "Marschall, Horst", "project_titles": "Zircon Hf Isotopes and the Continental Evolution of Dronning Maud Land, East Antacrtica", "projects": [{"proj_uid": "p0000448", "repository": "USAP-DC", "title": "Zircon Hf Isotopes and the Continental Evolution of Dronning Maud Land, East Antacrtica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -72.61, "title": "Zircon Hf Isotopes and the Continental Evolution of Dronning Maud Land, East Antarctica", "uid": "600135", "west": -6.44}, {"awards": "1141936 Foreman, Christine", "bounds_geometry": ["POINT(112.086 79.468)"], "date_created": "Thu, 01 Jan 2015 00:00:00 GMT", "description": "This award supports a detailed, molecular level characterization of dissolved organic carbon and microbes in Antarctic ice cores. Using the most modern biological (genomic), geochemical techniques, and advanced chemical instrumentation researchers will 1) optimize protocols for collecting, extracting and amplifying DNA from deep ice cores suitable for use in next generation pyrosequencing; 2) determine the microbial diversity within the ice core; and 3) obtain and analyze detailed molecular characterizations of the carbon in the ice by ultrahigh resolution Fourier Transform Ion Cyclotron Resonance Mass Spectrometry (FT-ICR-MS). With this pilot study investigators will be able to quantify the amount of material (microbial biomass and carbon) required to perform these characterizations, which is needed to inform future ice coring projects. The ultimate goal will be to develop protocols that maximize the yield, while minimizing the amount of ice required. The broader impacts include education and outreach at both the local and national levels. As a faculty mentor with the American Indian Research Opportunities and BRIDGES programs at Montana State University, Foreman will serve as a mentor to a Native American student in the lab during the summer months. Susan Kelly is an Education and Outreach Coordinator with a MS degree in Geology and over 10 years of experience in science outreach. She will coordinate efforts for comprehensive educational collaboration with the Hardin School District on the Crow Indian Reservation in South-central Montana.\n", "east": 112.086, "geometry": ["POINT(112.086 79.468)"], "keywords": "Antarctica; Biota; Genetic Sequences; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Paleoclimate; WAIS Divide; WAIS Divide Ice Core", "locations": "Antarctica; WAIS Divide", "north": 79.468, "nsf_funding_programs": null, "persons": "Foreman, Christine", "project_titles": "Molecular Level Characterization of Dissolved Organic Carbon and Microbial Diversity in the WAIS Divide Replicate Core", "projects": [{"proj_uid": "p0000342", "repository": "USAP-DC", "title": "Molecular Level Characterization of Dissolved Organic Carbon and Microbial Diversity in the WAIS Divide Replicate Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": 79.468, "title": "Molecular Level Characterization of Dissolved Organic Carbon and Microbial Diversity in the WAIS Divide Replicate Core", "uid": "600133", "west": 112.086}, {"awards": "1142010 Talghader, Joseph", "bounds_geometry": ["POLYGON((-148.81 -79.42,-145.111 -79.42,-141.412 -79.42,-137.713 -79.42,-134.014 -79.42,-130.315 -79.42,-126.616 -79.42,-122.917 -79.42,-119.218 -79.42,-115.519 -79.42,-111.82 -79.42,-111.82 -79.643,-111.82 -79.866,-111.82 -80.089,-111.82 -80.312,-111.82 -80.535,-111.82 -80.758,-111.82 -80.981,-111.82 -81.204,-111.82 -81.427,-111.82 -81.65,-115.519 -81.65,-119.218 -81.65,-122.917 -81.65,-126.616 -81.65,-130.315 -81.65,-134.014 -81.65,-137.713 -81.65,-141.412 -81.65,-145.111 -81.65,-148.81 -81.65,-148.81 -81.427,-148.81 -81.204,-148.81 -80.981,-148.81 -80.758,-148.81 -80.535,-148.81 -80.312,-148.81 -80.089,-148.81 -79.866,-148.81 -79.643,-148.81 -79.42))"], "date_created": "Thu, 01 Jan 2015 00:00:00 GMT", "description": "This award supports a project to combine the expertise of both glaciologists and optical engineers to develop polarization- preserving optical scattering techniques for borehole tools to identify changes in high-resolution crystal structure (fabric) and dust content of glacial ice. The intellectual merit of this work is that the fabric and impurity content of the ice contain details on climate, volcanic activity and ice flow history. Such fabric measurements are currently taken by slicing an ice core into sections after it has started to depressurize which is an extremely time-intensive process that damages the core and does not always preserve the properties of ice in its in-situ state. In addition the ice core usually must be consumed in order to measure the components of the dust. The fabric measurements of this study utilize the concept that singly-scattered light in ice preserves most of its polarization when it is backscattered once from bubbles or dust; therefore, changes to the polarization of singly-backscattered light must originate with the birefringence. Measurements based on this concept will enable this program to obtain continuous records of fabric and correlate them to chronology and dust content. The project will also develop advanced borehole instruments to replace current logging tools, which require optical sources, detectors and power cables to be submerged in borehole fluid and lowered into the ice sheet at temperatures of -50oC. The use of telecommunications fiber will allow all sources and detectors to remain at the surface and enable low-noise signal processing techniques such as lock-in amplification that increase signal integrity and reduce needed power. Further, fiber logging systems would be much smaller and more flexible than current tools and capable of navigating most boreholes without a heavy winch. In order to assess fabric in situ and test fiber-optic borehole tools, field measurements will be made at WAIS Divide and a deep log will also be made at Siple Dome, both in West Antarctica. If successful, the broader impacts of the proposed research would include the development of new analytical methods and lightweight logging tools for ice drilling research that can operate in boreholes drilled in ice. Eventually the work could result in the development of better prehistoric records of glacier flow, atmospheric particulates, precipitation, and climate forcing. The project encompasses a broad base of theoretical, experimental, and design work, which makes it ideal for training graduate students and advanced undergraduates. Collaboration with schools and classroom teachers will help bring aspects of optics, climate, and polar science to an existing Middle School curriculum.", "east": -111.82, "geometry": ["POINT(-130.315 -80.535)"], "keywords": "Antarctica; Ash Layer; Borehole Camera; Glaciology; Ice Core Records; WAIS Divide; WAIS Divide Ice Core", "locations": "WAIS Divide; Antarctica", "north": -79.42, "nsf_funding_programs": null, "persons": "Talghader, Joseph", "project_titles": "Optical Fabric and Fiber Logging of Glacial Ice", "projects": [{"proj_uid": "p0000339", "repository": "USAP-DC", "title": "Optical Fabric and Fiber Logging of Glacial Ice"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -81.65, "title": "Optical Fabric and Fiber Logging of Glacial Ice (1142010)", "uid": "600172", "west": -148.81}, {"awards": "1043657 Cassano, John", "bounds_geometry": ["POLYGON((163 -74.5,163.9 -74.5,164.8 -74.5,165.7 -74.5,166.6 -74.5,167.5 -74.5,168.4 -74.5,169.3 -74.5,170.2 -74.5,171.1 -74.5,172 -74.5,172 -74.9,172 -75.3,172 -75.7,172 -76.1,172 -76.5,172 -76.9,172 -77.3,172 -77.7,172 -78.1,172 -78.5,171.1 -78.5,170.2 -78.5,169.3 -78.5,168.4 -78.5,167.5 -78.5,166.6 -78.5,165.7 -78.5,164.8 -78.5,163.9 -78.5,163 -78.5,163 -78.1,163 -77.7,163 -77.3,163 -76.9,163 -76.5,163 -76.1,163 -75.7,163 -75.3,163 -74.9,163 -74.5))"], "date_created": "Thu, 01 Jan 2015 00:00:00 GMT", "description": "Antarctic coastal polynas are, at the same time, sea-ice free sites and \u0027sea-ice factories\u0027. They are open water surface locations where water mass transformation and densification occurs, and where atmospheric exchanges with the deep ocean circulation are established. Various models of the formation and persistence of these productive and diverse ocean ecosystems are hampered by the relative lack of in situ meteorological and physical oceanographic observations, especially during the inhospitable conditions of their formation and activity during the polar night.\n\nCharacterization of the lower atmosphere properties, air-sea surface heat fluxes and corresponding ocean hydrographic profiles of Antarctic polynyas, especially during strong wind events, is sought for a more detailed understanding of the role of polynyas in the production of latent-heat type sea ice and the formation, through sea ice brine rejection, of dense ocean bottom waters.\n\nA key technological innovation in this work continues to be the use of instrumented unmanned aircraft systems (UAS), to enable the persistent and safe observation of the interaction of light and strong katabatic wind fields, and mesocale cyclones in the Terra Nova Bay (Victoria Land, Antarctica) polynya waters during late winter and early summer time frames.\n", "east": 172.0, "geometry": ["POINT(167.5 -76.5)"], "keywords": "Antarctica; Atmosphere; Meteorology; Navigation; Oceans; Southern Ocean; Unmanned Aircraft", "locations": "Antarctica; Southern Ocean", "north": -74.5, "nsf_funding_programs": null, "persons": "Cassano, John; Palo, Scott", "project_titles": "Collaborative Research: Ocean-Ice-Atmosphere Interactions in the Terra Nova Bay Polynya, Antarctica", "projects": [{"proj_uid": "p0000417", "repository": "USAP-DC", "title": "Collaborative Research: Ocean-Ice-Atmosphere Interactions in the Terra Nova Bay Polynya, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.5, "title": "Ocean-Ice-Atmosphere Interactions in the Terra Nova Bay Polynya, Antarctica", "uid": "600125", "west": 163.0}, {"awards": "1043485 Curtice, Josh", "bounds_geometry": ["POLYGON((163.4 -77.47989,163.9848 -77.47989,164.5696 -77.47989,165.1544 -77.47989,165.7392 -77.47989,166.324 -77.47989,166.9088 -77.47989,167.4936 -77.47989,168.0784 -77.47989,168.6632 -77.47989,169.248 -77.47989,169.248 -77.565701,169.248 -77.651512,169.248 -77.737323,169.248 -77.823134,169.248 -77.908945,169.248 -77.994756,169.248 -78.080567,169.248 -78.166378,169.248 -78.252189,169.248 -78.338,168.6632 -78.338,168.0784 -78.338,167.4936 -78.338,166.9088 -78.338,166.324 -78.338,165.7392 -78.338,165.1544 -78.338,164.5696 -78.338,163.9848 -78.338,163.4 -78.338,163.4 -78.252189,163.4 -78.166378,163.4 -78.080567,163.4 -77.994756,163.4 -77.908945,163.4 -77.823134,163.4 -77.737323,163.4 -77.651512,163.4 -77.565701,163.4 -77.47989))"], "date_created": "Thu, 01 Jan 2015 00:00:00 GMT", "description": "This award supports a project to develop a better understanding of the response of the WAIS to climate change. The timing of the last deglaciation of the western Ross Sea will be improved using in situ terrestrial cosmogenic nuclides (3He, 10Be, 14C, 26Al, 36Cl) to date glacial erratics at key areas and elevations along the western Ross Sea coast. A state-of-the art ice sheet-shelf model will be used to identify mechanisms of deglaciation of the Ross Sea sector of WAIS. The model results and forcing will be compared with observations including the new cosmogenic data proposed here, with the aim of better determining and understanding the history and causes of WAIS deglaciation in the Ross Sea. There is considerable uncertainty, however, in the history of grounding line retreat from its last glacial maximum position, and virtually nothing is known about the timing of ice- surface lowering prior to ~10,000 years ago. Given these uncertainties, we are currently unable to assess one of the most important questions regarding the last deglaciation of the global ice sheets, namely as to whether the Ross Sea sector of WAIS contributed significantly to meltwater pulse 1A (MWP-1A), an extraordinarily rapid (~500-year duration) episode of ~20 m sea-level rise that occurred ~14,500 years ago. The intellectual merit of this project is that recent observations of startling changes at the margins of the Greenland and Antarctic ice sheets indicate that dynamic responses to warming may play a much greater role in the future mass balance of ice sheets than considered in current numerical projections of sea level rise. The broader impacts of this work are that it has direct societal relevance to developing an improved understanding of the response of the West Antarctic ice sheet to current and possible future environmental changes including the sea-level response to glacier and ice sheet melting due to global warming. The PI will communicate results from this project to a variety of audiences through the publication of peer-reviewed papers and by giving talks to public audiences. Finally the project will support a graduate student and undergraduate students in all phases of field-work, laboratory work and data interpretation.\n", "east": 169.248, "geometry": ["POINT(166.324 -77.908945)"], "keywords": "Antarctica; Cosmogenic Dating; Ross Sea; Sample/collection Description; Sample/Collection Description; Southern Ocean; WAIS", "locations": "WAIS; Ross Sea; Southern Ocean; Antarctica", "north": -77.47989, "nsf_funding_programs": null, "persons": "Kurz, Mark D.; Curtice, Josh", "project_titles": "Collaborative Research: A New Reconstruction of the Last West Antarctic Ice Sheet Deglaciation in the Ross Sea", "projects": [{"proj_uid": "p0000194", "repository": "USAP-DC", "title": "Collaborative Research: A New Reconstruction of the Last West Antarctic Ice Sheet Deglaciation in the Ross Sea"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.338, "title": "A New Reconstruction of the Last West Antarctic Ice Sheet Deglaciation in the Ross Sea", "uid": "600123", "west": 163.4}, {"awards": "1041022 McClintock, James", "bounds_geometry": ["POLYGON((-79 -60,-76.4 -60,-73.8 -60,-71.2 -60,-68.6 -60,-66 -60,-63.4 -60,-60.8 -60,-58.2 -60,-55.6 -60,-53 -60,-53 -61,-53 -62,-53 -63,-53 -64,-53 -65,-53 -66,-53 -67,-53 -68,-53 -69,-53 -70,-55.6 -70,-58.2 -70,-60.8 -70,-63.4 -70,-66 -70,-68.6 -70,-71.2 -70,-73.8 -70,-76.4 -70,-79 -70,-79 -69,-79 -68,-79 -67,-79 -66,-79 -65,-79 -64,-79 -63,-79 -62,-79 -61,-79 -60))"], "date_created": "Thu, 01 Jan 2015 00:00:00 GMT", "description": "The research will investigate the individual and combined effects of rising ocean acidification and sea surface temperatures on shallow-water calcified benthic organisms in western Antarctic Peninsular (WAP) marine communities. The Southern Ocean is predicted to become undersaturated in terms of both aragonite and calcite within 50 and 100 years, respectively, challenging calcification processes. Adding to the problem, antarctic calcified benthic marine organisms are more vulnerable to ocean acidification than temperate and tropical species because they are generally weakly calcified. Many antarctic organisms are essentially stenothermal, and those in the West Antarctic Peninsula are being subjected to rising seawater temperatures. The project employs both single-species and multi-species level approaches to evaluating the impacts of rising ocean acidification and seawater temperature on representative calcified and non-calcified macroalgae, on calcified and non-calcified mesograzers, and on a calcified macro-grazer, all of which are important ecological players in the rich benthic communities. Multi-species analysis will focus on the diverse assemblage of amphipods and mesogastropods that are associated with dominant macroalgae that collectively play a key role in community dynamics along the WAP. The project will support undergraduate research, both through NSF programs, as well as home university-based programs, some designed to enhance the representation of minorities in the sciences. The principal investigators also will support and foster graduate education through mentoring of graduate students. Through their highly successful UAB IN ANTARCTICA interactive web program, they will continue to involve large numbers of teachers, K-12 students, and other members of the community at large in their scientific endeavors in Antarctica.", "east": -53.0, "geometry": ["POINT(-66 -65)"], "keywords": "Antarctic Peninsula; Biota; Oceans; Southern Ocean", "locations": "Antarctic Peninsula; Southern Ocean", "north": -60.0, "nsf_funding_programs": null, "persons": "McClintock, James; Amsler, Charles; Angus, Robert", "project_titles": "The effects of ocean acidification and rising sea surface temperatures on shallow-water benthic organisms in Antarctica", "projects": [{"proj_uid": "p0000426", "repository": "USAP-DC", "title": "The effects of ocean acidification and rising sea surface temperatures on shallow-water benthic organisms in Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -70.0, "title": "The effects of ocean acidification and rising sea surface temperatures on shallow-water benthic organisms in Antarctica", "uid": "600122", "west": -79.0}, {"awards": "1043454 Kooyman, Gerald", "bounds_geometry": ["POLYGON((-172.642 -72.55,-170.9074 -72.55,-169.1728 -72.55,-167.4382 -72.55,-165.7036 -72.55,-163.969 -72.55,-162.2344 -72.55,-160.4998 -72.55,-158.7652 -72.55,-157.0306 -72.55,-155.296 -72.55,-155.296 -73.0743,-155.296 -73.5986,-155.296 -74.1229,-155.296 -74.6472,-155.296 -75.1715,-155.296 -75.6958,-155.296 -76.2201,-155.296 -76.7444,-155.296 -77.2687,-155.296 -77.793,-157.0306 -77.793,-158.7652 -77.793,-160.4998 -77.793,-162.2344 -77.793,-163.969 -77.793,-165.7036 -77.793,-167.4382 -77.793,-169.1728 -77.793,-170.9074 -77.793,-172.642 -77.793,-172.642 -77.2687,-172.642 -76.7444,-172.642 -76.2201,-172.642 -75.6958,-172.642 -75.1715,-172.642 -74.6472,-172.642 -74.1229,-172.642 -73.5986,-172.642 -73.0743,-172.642 -72.55))"], "date_created": "Thu, 01 Jan 2015 00:00:00 GMT", "description": "The emperor penguin dives deeper and longer, fasts longer, and endures the harshest weather conditions of all diving birds. It spends about four and half months per annum deep in Antarctic pack ice away from shore and stations, and thus is largely unavailable for study. This time includes preparation for the molt, and travel to the colony to breed, a time period in which great swings in body weight occur. This study will fill an important gap in what we know about the biology of the annual cycle of the emperor by examining the molt-post molt period. The P.I. proposes to traverse the Amundsen and Bellingshausen seas on the Oden, to locate and tag emperor penguins during the molt season. The objectives are to (1) Place satellite tags on 20 adult post molt birds to determine their route, rate of travel, and diving behavior as they return back to their breeding colonies, (2) Obtain an index of body condition, (3) Collect guano to determine the type of food consumed by emperor penguins in the region, (4) Conduct shipboard surveys to sight and plot the location and abundance of adult and juvenile birds on the ship\u0027s track. The PI hypothesizes that bird dives will be shallow during the initial post-molt phase, and that food will consist primarily of krill; that there will be differential dispersal of birds from the Ross Sea vs. Marie Byrd Land, with Ross Sea birds traveling farther; and that the greatest adult mortality occurs during the molt and early post molt period. Broader impacts include training of a post doc, a graduate student, and an aquarium volunteer. The P.I. also will present findings through a website, through public lectures, and in collaboration with the Birch aquarium.\n", "east": -155.296, "geometry": ["POINT(-163.969 -75.1715)"], "keywords": "Amundsen Sea; Biota; Oceans; Penguin; Sample/collection Description; Sample/Collection Description; Southern Ocean", "locations": "Southern Ocean; Amundsen Sea", "north": -72.55, "nsf_funding_programs": null, "persons": "Kooyman, Gerald", "project_titles": "Pre and post molt biology of emperor penguins - Oden trans - Ross / Amundsen Sea cruise", "projects": [{"proj_uid": "p0000325", "repository": "USAP-DC", "title": "Pre and post molt biology of emperor penguins - Oden trans - Ross / Amundsen Sea cruise"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.793, "title": "Pre and Post Molt Biology of Emperor Penguins - Oden Trans - Ross / Amundsen Sea Cruise", "uid": "600149", "west": -172.642}, {"awards": "0636731 Bender, Michael", "bounds_geometry": ["POINT(160.35 -77.87)"], "date_created": "Wed, 26 Nov 2014 00:00:00 GMT", "description": "These data describe the analyses of the elemental and isotopic composition of O2, N2, and Ar and total air content made on the trapped air from three shallow ice cores (\u003c34m depth) collected during the 2009 field campaign to Mullins Valley of the Dry Valleys, Antarctica.", "east": 160.35, "geometry": ["POINT(160.35 -77.87)"], "keywords": "Antarctica; Chemistry:fluid; Chemistry:Fluid; Dry Valleys; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Isotope; Paleoclimate; Radar Interferometer", "locations": "Antarctica; Dry Valleys", "north": -77.87, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Bender, Michael; Yau, Audrey M.", "project_titles": "Collaborative Research: Dating and Paleoenvironmental Studies on Ancient Ice in the Dry Valleys, Antarctica", "projects": [{"proj_uid": "p0000039", "repository": "USAP-DC", "title": "Collaborative Research: Dating and Paleoenvironmental Studies on Ancient Ice in the Dry Valleys, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.87, "title": "Measurements of Trapped Air from Mullins Valley, Dry Valleys, Antarctica", "uid": "609597", "west": 160.35}, {"awards": "0758274 Parizek, Byron; 0732844 Anandakrishnan, Sridhar; 0632198 Anandakrishnan, Sridhar", "bounds_geometry": ["POLYGON((-110.06 -74.05,-109.582 -74.05,-109.104 -74.05,-108.626 -74.05,-108.148 -74.05,-107.67 -74.05,-107.192 -74.05,-106.714 -74.05,-106.236 -74.05,-105.758 -74.05,-105.28 -74.05,-105.28 -74.31,-105.28 -74.57,-105.28 -74.83,-105.28 -75.09,-105.28 -75.35,-105.28 -75.61,-105.28 -75.87,-105.28 -76.13,-105.28 -76.39,-105.28 -76.65,-105.758 -76.65,-106.236 -76.65,-106.714 -76.65,-107.192 -76.65,-107.67 -76.65,-108.148 -76.65,-108.626 -76.65,-109.104 -76.65,-109.582 -76.65,-110.06 -76.65,-110.06 -76.39,-110.06 -76.13,-110.06 -75.87,-110.06 -75.61,-110.06 -75.35,-110.06 -75.09,-110.06 -74.83,-110.06 -74.57,-110.06 -74.31,-110.06 -74.05))"], "date_created": "Mon, 03 Nov 2014 00:00:00 GMT", "description": "This data set consists of experimental output from a higher-order finite-element model that was utilized in conjunction with existing data sets to isolate essential physical processes affecting Thwaites Glacier (TG) in the Amundsen Sea Embayment (ASE) of West Antarctica.", "east": -105.28, "geometry": ["POINT(-107.67 -75.35)"], "keywords": "Amundsen Sea; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Sheet Model; Thwaites Glacier", "locations": "Thwaites Glacier; Amundsen Sea; Antarctica", "north": -74.05, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Parizek, Byron R.; Blankenship, Donald D.; Dupont, Todd K.; Holt, John W.", "project_titles": "Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System; IPY: Flow Dynamics of the Amundsen Sea Glaciers: Thwaites and Pine Island.", "projects": [{"proj_uid": "p0000174", "repository": "USAP-DC", "title": "Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System"}, {"proj_uid": "p0000699", "repository": "USAP-DC", "title": "IPY: Flow Dynamics of the Amundsen Sea Glaciers: Thwaites and Pine Island."}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -76.65, "title": "Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System", "uid": "609619", "west": -110.06}, {"awards": "0838855 Jacobel, Robert; 0838854 Jacobel, Robert", "bounds_geometry": ["POLYGON((-164 -84.2,-163 -84.2,-162 -84.2,-161 -84.2,-160 -84.2,-159 -84.2,-158 -84.2,-157 -84.2,-156 -84.2,-155 -84.2,-154 -84.2,-154 -84.21,-154 -84.22,-154 -84.23,-154 -84.24,-154 -84.25,-154 -84.26,-154 -84.27,-154 -84.28,-154 -84.29,-154 -84.3,-155 -84.3,-156 -84.3,-157 -84.3,-158 -84.3,-159 -84.3,-160 -84.3,-161 -84.3,-162 -84.3,-163 -84.3,-164 -84.3,-164 -84.29,-164 -84.28,-164 -84.27,-164 -84.26,-164 -84.25,-164 -84.24,-164 -84.23,-164 -84.22,-164 -84.21,-164 -84.2))"], "date_created": "Thu, 30 Oct 2014 00:00:00 GMT", "description": "This data set includes ground-based, gridded, ice-penetrating radar thickness and basal reflection power, along with GPS coordinates, for two areas of Whillans Ice Stream: Subglacial Lake Whillans and the Whillans Ice Stream grounding zone.", "east": -154.0, "geometry": ["POINT(-159 -84.25)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; GPS; Radar; Whillans Ice Stream", "locations": "Antarctica; Whillans Ice Stream", "north": -84.2, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Jacobel, Robert", "project_titles": "Collaborative Research: Integrative Study of Marine Ice Sheet Stability \u0026 Subglacial Life Habitats in W Antarctica - Lake \u0026 Ice Stream Subglacial Access Research Drilling (LISSARD)", "projects": [{"proj_uid": "p0000105", "repository": "USAP-DC", "title": "Collaborative Research: Integrative Study of Marine Ice Sheet Stability \u0026 Subglacial Life Habitats in W Antarctica - Lake \u0026 Ice Stream Subglacial Access Research Drilling (LISSARD)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -84.3, "title": "Radar Studies of Subglacial Lake Whillans and the Whillans Ice Stream Grounding Zone", "uid": "609594", "west": -164.0}, {"awards": "0636953 Saltzman, Eric", "bounds_geometry": ["POINT(158.43 -77.48)"], "date_created": "Wed, 10 Sep 2014 00:00:00 GMT", "description": "This data set includes methyl chloride (CH\u003csub\u003e3\u003c/sub\u003eCI) measurements made on air extracted from 62 samples from the Taylor Dome M3C1 ice core in East Antarctica. CH\u003csub\u003e3\u003c/sub\u003eCI was measured in air from the Taylor Dome ice core to reconstruct an atmospheric record for the Holocene (11-0 kyr B.P.) and part of the last glacial period (50-30 kyr B.P.).", "east": 158.43, "geometry": ["POINT(158.43 -77.48)"], "keywords": "Antarctica; Chemistry:fluid; Chemistry:Fluid; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Taylor Dome; Taylor Dome Ice Core", "locations": "Taylor Dome; Antarctica", "north": -77.48, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Saltzman, Eric; Aydin, Murat", "project_titles": "Methyl Chloride, Methyl Bromide, and Carbonyl Sulfide in Deep Antarctic Ice Cores", "projects": [{"proj_uid": "p0000042", "repository": "USAP-DC", "title": "Methyl Chloride, Methyl Bromide, and Carbonyl Sulfide in Deep Antarctic Ice Cores"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Taylor Dome Ice Core", "south": -77.48, "title": "Methyl Chloride Measurements in the Taylor Dome M3C1 Ice Core", "uid": "609600", "west": 158.43}, {"awards": "0636953 Saltzman, Eric", "bounds_geometry": ["POINT(157.4 -77.44)"], "date_created": "Wed, 10 Sep 2014 00:00:00 GMT", "description": "The data set includes methyl bromide (CH3Br) measurements made on air extracted from 70 samples from the Taylor Dome M3C1 ice core. CH3Br was measured in air from the Taylor Dome ice core to reconstruct an atmospheric record for the Holocene (11-0 kyr B.P.) and part of the last glacial period (50-30 kyr B.P.).", "east": 157.4, "geometry": ["POINT(157.4 -77.44)"], "keywords": "Antarctica; Chemistry:fluid; Chemistry:Fluid; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Taylor Dome; Taylor Dome Ice Core", "locations": "Antarctica; Taylor Dome", "north": -77.44, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Saltzman, Eric; Aydin, Murat", "project_titles": "Methyl Chloride, Methyl Bromide, and Carbonyl Sulfide in Deep Antarctic Ice Cores", "projects": [{"proj_uid": "p0000042", "repository": "USAP-DC", "title": "Methyl Chloride, Methyl Bromide, and Carbonyl Sulfide in Deep Antarctic Ice Cores"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Taylor Dome Ice Core", "south": -77.44, "title": "Methyl Bromide Measurements in the Taylor Dome M3C1 Ice Core", "uid": "609598", "west": 157.4}, {"awards": "0944199 Waddington, Edwin", "bounds_geometry": ["POINT(-112.085 -79.467)"], "date_created": "Wed, 03 Sep 2014 00:00:00 GMT", "description": "This data set contains a record of speeds for vertically-propagating compression-waves measured throughout the depth of ice that surrounds the WAIS-D borehole. Multiple logs provide redundant measurements for all depths. Data for individual wave-speed measurements were included, as well as 3 m running averages for each log. A Takeaway Profile that represents our interpretation of the combined data set is also included.", "east": -112.085, "geometry": ["POINT(-112.085 -79.467)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Physical Properties; Sonic Log; WAIS Divide; WAIS Divide Ice Core", "locations": "WAIS Divide; Antarctica", "north": -79.467, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Waddington, Edwin D.; Matsuoka, Kenichi; Kluskiewicz, Dan; McCarthy, Michael; Anandakrishnan, Sridhar", "project_titles": "Collaborative research: acoustic logging of the WAIS Divide borehole", "projects": [{"proj_uid": "p0000051", "repository": "USAP-DC", "title": "Collaborative research: acoustic logging of the WAIS Divide borehole"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.467, "title": "WAIS Divide Sonic Log Data", "uid": "609592", "west": -112.085}, {"awards": "0944193 MacAyeal, Douglas", "bounds_geometry": ["POLYGON((-88 42,-87.9 42,-87.8 42,-87.7 42,-87.6 42,-87.5 42,-87.4 42,-87.3 42,-87.2 42,-87.1 42,-87 42,-87 41.9,-87 41.8,-87 41.7,-87 41.6,-87 41.5,-87 41.4,-87 41.3,-87 41.2,-87 41.1,-87 41,-87.1 41,-87.2 41,-87.3 41,-87.4 41,-87.5 41,-87.6 41,-87.7 41,-87.8 41,-87.9 41,-88 41,-88 41.1,-88 41.2,-88 41.3,-88 41.4,-88 41.5,-88 41.6,-88 41.7,-88 41.8,-88 41.9,-88 42))"], "date_created": "Mon, 25 Aug 2014 00:00:00 GMT", "description": "This data set represents a typical single iceberg capsize experiment. Included in this data set are all the parameters of the plastic iceberg\u0027s density and dimensions, the density of the water surrounding the iceberg, and the value of gravitational acceleration. The timeseries data consists of all the kinematic and energetic variables as a function of time for the iceberg capsize experiment.", "east": -87.0, "geometry": ["POINT(-87.5 41.5)"], "keywords": "Antarctica; Glaciology; Iceberg; Kinetics", "locations": "Antarctica", "north": 42.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "MacAyeal, Douglas", "project_titles": "Collaborative Research: Explosive Ice-Shelf Disintegration", "projects": [{"proj_uid": "p0000005", "repository": "USAP-DC", "title": "Collaborative Research: Explosive Ice-Shelf Disintegration"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": 41.0, "title": "Iceberg Capsize Kinematics and Energetics", "uid": "609590", "west": -88.0}, {"awards": "0440819 Taylor, Kendrick; 0230396 Taylor, Kendrick; 0944348 Taylor, Kendrick; 0944191 Taylor, Kendrick; 0440817 Taylor, Kendrick", "bounds_geometry": ["POINT(-112.1115 -79.481)"], "date_created": "Mon, 18 Aug 2014 00:00:00 GMT", "description": "This data set contains electrical measurements that were used to develop the WDC06A-7 timescale.", "east": -112.1115, "geometry": ["POINT(-112.1115 -79.481)"], "keywords": "Antarctica; Electrical Conductivity; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Physical Properties; WAIS Divide; WAIS Divide Ice Core", "locations": "WAIS Divide; Antarctica", "north": -79.481, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Fudge, T. J.; Taylor, Kendrick C.", "project_titles": "Collaborative Research: Establishing the Chronology and Histories of Accumulation and Ice Dynamics for the WAIS Divide Core", "projects": [{"proj_uid": "p0000026", "repository": "USAP-DC", "title": "Collaborative Research: Establishing the Chronology and Histories of Accumulation and Ice Dynamics for the WAIS Divide Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.481, "title": "WAIS Divide Ice Core Electrical Conductance Measurements, Antarctica", "uid": "609591", "west": -112.1115}, {"awards": "0539578 Alley, Richard", "bounds_geometry": ["POINT(-112.3 -79.433333)"], "date_created": "Thu, 14 Aug 2014 00:00:00 GMT", "description": "This data set includes bubble number-density measured at depths from 120 meters to 560 meters at 20-meter intervals in both horizontal and vertical samples. The data set also includes modeled temperature reconstructions based on the model developed by Spencer and others (2006).", "east": -112.3, "geometry": ["POINT(-112.3 -79.433333)"], "keywords": "Air Bubbles; Antarctica; Camera; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records", "locations": "Antarctica", "north": -79.433333, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Alley, Richard; Fegyveresi, John", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -79.433333, "title": "Bubble Number-density Data and Modeled Paleoclimates", "uid": "609538", "west": -112.3}, {"awards": "XXXXXXX Palais, Julie", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Thu, 17 Jul 2014 00:00:00 GMT", "description": "The MODIS Mosaic of Antarctica 2008-2009 (MOA2009) Image Map consists of two cloud-free digital image maps that show mean surface morphology and a quantitative measure of optical snow grain size on the Antarctic continent and surrounding islands using 260 orbit swaths from the Moderate Resolution Imaging Spectroradiometer (MODIS) instruments on board the NASA EOS Aqua and Terra satellites.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; MODIS; Satellite Remote Sensing", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Haran, Terry; Bohlander, Jennifer; Scambos, Ted; Painter, Thomas; Fahnestock, Mark", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -90.0, "title": "MODIS Mosaic of Antarctica 2008-2009 (MOA2009) Image Map", "uid": "609593", "west": -180.0}, {"awards": "0944764 Brook, Edward J.", "bounds_geometry": ["POINT(-148.82 -81.66)"], "date_created": "Wed, 25 Jun 2014 00:00:00 GMT", "description": "This data set provides a new CO2 record from the Siple Dome ice core, Antarctica, that covers 7.4-9.0 ka (thousand years) with 8- to 16-year resolution. A small, about 1-2 ppm, increase of atmospheric CO2 during the 8.2 ka event was observed. The increase is not significant when compared to other centennial variations in the Holocene that are not linked to large temperature changes. The results do not agree with leaf stomata records that suggest a CO2 decrease of up to ~25 ppm and imply that the sensitivity of atmospheric CO2 to the primarily northern hemisphere cooling of the 8.2 ka event was limited.", "east": -148.82, "geometry": ["POINT(-148.82 -81.66)"], "keywords": "Antarctica; Chemistry:fluid; Chemistry:Fluid; Geochemistry; Geochronology; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Paleoclimate; Siple Dome; Siple Dome Ice Core; South Pole; WAISCORES", "locations": "Antarctica; South Pole; Siple Dome", "north": -81.66, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Brook, Edward J.; Ahn, Jinho", "project_titles": "Atmospheric CO2 and Abrupt Climate Change", "projects": [{"proj_uid": "p0000179", "repository": "USAP-DC", "title": "Atmospheric CO2 and Abrupt Climate Change"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core", "south": -81.66, "title": "High-resolution Atmospheric CO2 during 7.4-9.0 ka", "uid": "609527", "west": -148.82}, {"awards": "0539232 Cuffey, Kurt", "bounds_geometry": ["POINT(-112.0865 -79.4676)"], "date_created": "Wed, 30 Apr 2014 00:00:00 GMT", "description": "This data set reports depth versus temperatures in the fluid-filled portion of the West Antarctic Ice Sheet Divide (WAIS\u2013D) deep borehole (70 to 3328 meters depth). Data were acquired on December 5, 2011 and have been post-processed to convert resistance to temperature.", "east": -112.0865, "geometry": ["POINT(-112.0865 -79.4676)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Temperature; WAIS Divide; WAIS Divide Ice Core", "locations": "WAIS Divide; Antarctica", "north": -79.4676, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Cuffey, Kurt M.; Clow, Gary D.", "project_titles": "Collaborative Research: Physical Properties of the WAIS Divide Deep Core", "projects": [{"proj_uid": "p0000038", "repository": "USAP-DC", "title": "Collaborative Research: Physical Properties of the WAIS Divide Deep Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.4676, "title": "Temperature Profile of the West Antarctic Ice Sheet Divide Deep Borehole", "uid": "609550", "west": -112.0865}, {"awards": "0944248 MacAyeal, Douglas", "bounds_geometry": ["POLYGON((-63 -63,-62.2 -63,-61.4 -63,-60.6 -63,-59.8 -63,-59 -63,-58.2 -63,-57.4 -63,-56.6 -63,-55.8 -63,-55 -63,-55 -63.4,-55 -63.8,-55 -64.2,-55 -64.6,-55 -65,-55 -65.4,-55 -65.8,-55 -66.2,-55 -66.6,-55 -67,-55.8 -67,-56.6 -67,-57.4 -67,-58.2 -67,-59 -67,-59.8 -67,-60.6 -67,-61.4 -67,-62.2 -67,-63 -67,-63 -66.6,-63 -66.2,-63 -65.8,-63 -65.4,-63 -65,-63 -64.6,-63 -64.2,-63 -63.8,-63 -63.4,-63 -63))"], "date_created": "Tue, 29 Apr 2014 00:00:00 GMT", "description": "This data set addresses why surface melt water lakes on ice shelves and ice sheets are notably influential in triggering ice-shelf break-up and modulating seasonal ice flow, and are thus principle avenues by which environmental change can be transmitted to the ice sheets of Antarctica and Greenland. A comparative analysis is performed of lake geometry and derived depth (using Landsat image reflectance) in two distinct regions, one a collapsing ice shelf and the other an ablation zone of a land terminating ice sheet, to better characterize the range of surface lake variability.", "east": -55.0, "geometry": ["POINT(-59 -65)"], "keywords": "Antarctica; Antarctic Peninsula; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Shelf; Larsen B Ice Shelf; Sample/collection Description; Sample/Collection Description; Supraglacial Meltwater", "locations": "Antarctica; Larsen B Ice Shelf; Antarctic Peninsula", "north": -63.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "MacAyeal, Douglas", "project_titles": "Model Studies of Surface Water Behavior on Ice Shelves", "projects": [{"proj_uid": "p0000052", "repository": "USAP-DC", "title": "Model Studies of Surface Water Behavior on Ice Shelves"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -67.0, "title": "Standing Water Depth on Larsen B Ice Shelf", "uid": "609584", "west": -63.0}, {"awards": "0838811 Sergienko, Olga", "bounds_geometry": ["POINT(0 -78)"], "date_created": "Mon, 14 Apr 2014 00:00:00 GMT", "description": "This data set consists of outputs of several numerical models simulating ice stream flow over undulated bed, interaction of ice stream flow, and subglacial and supraglacial hydraulic systems. All simulations are performed for idealized geometries using finite-element models.", "east": 0.0, "geometry": ["POINT(0 -78)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Sheet Model; Ice Thickness; Ice Velocity", "locations": "Antarctica", "north": -78.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Sergienko, Olga", "project_titles": "Model Investigation of Ice Stream/Subglacial Lake Systems", "projects": [{"proj_uid": "p0000045", "repository": "USAP-DC", "title": "Model Investigation of Ice Stream/Subglacial Lake Systems"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Interaction of Ice Stream Flow with Heterogeneous Beds", "uid": "609583", "west": 0.0}, {"awards": "0738658 Price, P. Buford", "bounds_geometry": ["POINT(-112.135833 -79.482778)"], "date_created": "Thu, 03 Apr 2014 00:00:00 GMT", "description": "This data set consists of data from optical logs made at the WAIS Divide with a laser dust logger in clear ice at depths between 1403.58 meters and 3329.8 meters.", "east": -112.135833, "geometry": ["POINT(-112.135833 -79.482778)"], "keywords": "Antarctica; Atmosphere; Chemistry:ice; Chemistry:Ice; Dust; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Laser Dust Logger; WAIS Divide Ice Core", "locations": "Antarctica", "north": -79.482778, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Bay, Ryan", "project_titles": "Climatology, Meteorology, and Microbial Metabolism in Ice with Dust Loggers and Fluorimetry", "projects": [{"proj_uid": "p0000009", "repository": "USAP-DC", "title": "Climatology, Meteorology, and Microbial Metabolism in Ice with Dust Loggers and Fluorimetry"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.482778, "title": "WAIS Divide Laser Dust Logger Data", "uid": "609540", "west": -112.135833}, {"awards": "0839066 Cole-Dai, Jihong", "bounds_geometry": ["POINT(-112.1 -79.5)"], "date_created": "Wed, 19 Mar 2014 00:00:00 GMT", "description": "The brittle ice section (577-1300 m) of the main WAIS Divide ice core (WDC06A) was analyzed for major ion concentrations with ion chromatography.", "east": -112.1, "geometry": ["POINT(-112.1 -79.5)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Ion Chromatograph; WAIS Divide; WAIS Divide Ice Core", "locations": "WAIS Divide; Antarctica", "north": -79.5, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Cole-Dai, Jihong", "project_titles": "Major Ion Chemical Analysis of Brittle Ice in the WAIS Divide Ice Core", "projects": [{"proj_uid": "p0000047", "repository": "USAP-DC", "title": "Major Ion Chemical Analysis of Brittle Ice in the WAIS Divide Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.5, "title": "Major Ion Chemistry Data of WAIS Divide Ice Core Brittle Ice", "uid": "609546", "west": -112.1}, {"awards": "0636929 Bales, Roger", "bounds_geometry": ["POINT(-112.085 -79.467)"], "date_created": "Mon, 17 Mar 2014 00:00:00 GMT", "description": "This data set contains atmospheric mixing ratios of nitric oxide, ozone, hydrogen peroxide, methylhydroperoxide, and concentrations in surface snow and in snow pits of nitrate, nitrite, and hydrogen peroxide at the WAIS Divide deep ice-coring site.", "east": -112.085, "geometry": ["POINT(-112.085 -79.467)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; WAIS Divide; WAIS Divide Ice Core", "locations": "WAIS Divide; Antarctica", "north": -79.467, "nsf_funding_programs": null, "persons": "Bales, Roger", "project_titles": "Atmospheric, Snow and Firn Chemistry Studies for Interpretation of WAIS-Divide Cores", "projects": [{"proj_uid": "p0000041", "repository": "USAP-DC", "title": "Atmospheric, Snow and Firn Chemistry Studies for Interpretation of WAIS-Divide Cores"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.467, "title": "Measurements of Air and Snow Photochemical Species at WAIS Divide, Antarctica", "uid": "609585", "west": -112.085}, {"awards": "0944584 Sowers, Todd; 0538578 Brook, Edward J.; 0538538 Sowers, Todd", "bounds_geometry": ["POINT(-38.5 72.6)", "POINT(-112.0865 -79.4676)"], "date_created": "Fri, 31 Jan 2014 00:00:00 GMT", "description": "This data set measures methane concentrations in ancient air trapped in the West Antarctic Ice Sheet (WAIS) Divide and Greenland Ice Sheet Project (GISP2) ice cores; presenting two, high-resolution ice core methane records of the past 2500 years, one from each pole. These measurements were used to reconstruct the methane Inter-Polar Difference (IPD) during the late Holocene. Also included are model results of methane emissions that were presented in the manuscript describing this data set.", "east": -38.5, "geometry": ["POINT(-38.5 72.6)", "POINT(-112.0865 -79.4676)"], "keywords": "Antarctica; Arctic; Chemistry:fluid; Chemistry:Fluid; Geochemistry; GISP2; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Methane; Paleoclimate; WAIS Divide; WAIS Divide Ice Core", "locations": "Antarctica; WAIS Divide; Arctic", "north": 72.6, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Mitchell, Logan E", "project_titles": "Collaborative Research: Constructing an Ultra-high Resolution Atmospheric Methane Record for the Last 140,000 Years from WAIS Divide Core.", "projects": [{"proj_uid": "p0000025", "repository": "USAP-DC", "title": "Collaborative Research: Constructing an Ultra-high Resolution Atmospheric Methane Record for the Last 140,000 Years from WAIS Divide Core."}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.4676, "title": "Late Holocene Methane Concentrations from WAIS Divide and GISP2", "uid": "609586", "west": -112.0865}, {"awards": "0538553 Cole-Dai, Jihong", "bounds_geometry": ["POINT(-112 -79.5)"], "date_created": "Wed, 08 Jan 2014 00:00:00 GMT", "description": "This data set contains major ion concentrations from the chemical analysis of two WAIS Divide ice cores (WDC05Q, 0-114 m; WDC06A, 0-129 m). The analytical technique is Mettler-based Continuous Flow Analysis with online Ion Chromatography detection (CFA-IC). Depth resolution is approximately 2 cm per sample or per measurement.", "east": -112.0, "geometry": ["POINT(-112 -79.5)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Ion Chromatograph; WAIS Divide; WAIS Divide Ice Core", "locations": "WAIS Divide; Antarctica", "north": -79.5, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Cole-Dai, Jihong", "project_titles": "Major Ion Chemistry of WAIS Divide Ice Core", "projects": [{"proj_uid": "p0000035", "repository": "USAP-DC", "title": "Major Ion Chemistry of WAIS Divide Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.5, "title": "Major Ion Concentrations in WDC05Q and WDC06A Ice Cores (WAIS Divide)", "uid": "609544", "west": -112.0}, {"awards": "0838937 Costa, Daniel", "bounds_geometry": ["POLYGON((162 -75,162.7 -75,163.4 -75,164.1 -75,164.8 -75,165.5 -75,166.2 -75,166.9 -75,167.6 -75,168.3 -75,169 -75,169 -75.3,169 -75.6,169 -75.9,169 -76.2,169 -76.5,169 -76.8,169 -77.1,169 -77.4,169 -77.7,169 -78,168.3 -78,167.6 -78,166.9 -78,166.2 -78,165.5 -78,164.8 -78,164.1 -78,163.4 -78,162.7 -78,162 -78,162 -77.7,162 -77.4,162 -77.1,162 -76.8,162 -76.5,162 -76.2,162 -75.9,162 -75.6,162 -75.3,162 -75))"], "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "Marine mammals of the Southern Ocean have evolved diverse life history patterns and foraging strategies to accommodate extreme fluctuations in the physical and biological environment. In light of ongoing climate change and the dramatic shifts in the extent and persistence of sea ice in the Ross Sea, it is critical to understand how Weddell seals, Leptonychotes weddellii, a key apex predator, select and utilize foraging habitats. Recent advances in satellite-linked animal-borne conductivity, temperature and depth (CTD) tags make it possible to simultaneously collect data on seal locations, their diving patterns, and the temperature and salinity profiles of the water columns they utilize. In other ecosystems, such data have revealed that marine predators selectively forage in areas where currents and fronts serve to locally concentrate prey resources, and that these conditions are required to sustain populations. Weddell seals will be studied in McMurdo Sound and at Terra Nova Bay, Ross Sea and will provide the first new data on Weddell seal winter diving behavior and habitat use in almost two decades. The relationship between an animal\u0027s diving behavior and physical habitat has enormous potential to enhance monitoring studies and to provide insight into how changes in ice conditions (due either to warming or the impact of large icebergs, such as B15) might impact individual time budgets and foraging success. The second thrust of this project is to use the profiles obtained from CTD seal tags to model the physical oceanography of this region. Current mathematical models of physical oceanographic processes in the Southern Ocean are directed at better understanding the role that it plays in global climate processes, and the linkages between physical and biological oceanographic processes. However, these efforts are limited by the scarcity of oceanographic data at high latitudes in the winter months; CTD tags deployed on animals will collect data at sufficient spatial and temporal resolution to improve data density. The project will contribute to two IPY endorsed initiatives: MEOP (Marine Mammals as Explorers of the Ocean Pole to Pole) and CAML (Census of Antarctic Marine Life). In addition, the highly visual nature of the data and analysis lends itself to public and educational display and outreach, particularly as they relate to global climate change, and we have collaborations with undergraduate and graduate training programs, the Seymour Marine Discovery Center, and the ARMADA program to foster these broader impacts.\n", "east": 169.0, "geometry": ["POINT(165.5 -76.5)"], "keywords": "Antarctica; Biota; Oceans; Ross Sea; Southern Ocean", "locations": "Antarctica; Southern Ocean; Ross Sea", "north": -75.0, "nsf_funding_programs": null, "persons": "Costa, Daniel", "project_titles": "Collaborative Research: Weddell seals as autonomous sensors of the winter oceanography of the Ross Sea", "projects": [{"proj_uid": "p0000661", "repository": "USAP-DC", "title": "Collaborative Research: Weddell seals as autonomous sensors of the winter oceanography of the Ross Sea"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Weddell seals as autonomous sensors of the winter oceanography of the Ross Sea", "uid": "600025", "west": 162.0}, {"awards": "1043740 Lenczewski, Melissa", "bounds_geometry": ["POLYGON((165 -77.5,165.3 -77.5,165.6 -77.5,165.9 -77.5,166.2 -77.5,166.5 -77.5,166.8 -77.5,167.1 -77.5,167.4 -77.5,167.7 -77.5,168 -77.5,168 -77.6,168 -77.7,168 -77.8,168 -77.9,168 -78,168 -78.1,168 -78.2,168 -78.3,168 -78.4,168 -78.5,167.7 -78.5,167.4 -78.5,167.1 -78.5,166.8 -78.5,166.5 -78.5,166.2 -78.5,165.9 -78.5,165.6 -78.5,165.3 -78.5,165 -78.5,165 -78.4,165 -78.3,165 -78.2,165 -78.1,165 -78,165 -77.9,165 -77.8,165 -77.7,165 -77.6,165 -77.5))"], "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "The PI proposes to utilize computer models used by hydrogeologists to establish the fate and transport of contamination and determine the extent of drilling fluid contamination in the ANDRILL SMS core. For these models, previously collected logs of lithology, porosity, fracture density, fracture type, fracture orientation, drilling fluid loss, drilling fluid characteristics and temperature will be used as input parameters. In addition, biodegradation and sorption constants for the drilling fluid will be determined and incorporated into the models. Samples of drilling fluids used during coring as well as the return fluids were collected at the drill site using standard microbiological sampling techniques. Fluids will be tested at in situ temperatures under aerobic and anaerobic conditions to determine biodegradation constants. Sorption will be determined between the drilling fluids and core samples using standard isotherm methods. Geochemical and microbial fingerprints of the fluids and the changes during biodegradation will determine the potential impact of the drilling fluids on the isolated microbial communities and the geochemistry within various subsurface lithologic units beneath the southern McMurdo Sound in Antarctica. The results of this study could potentially provide guidelines on developing less detrimental methods for future exploration, if deemed necessary through this research.\nThis proposed project will train a graduate student. The methods developed for analyses of samples in this project will serve as a guide for future studies of similar interest and will improve the understanding of ecological impacts of geologic drilling in Antarctica. The results of this study will be used as a reference for comparison with future studies examining newly developed, and improved, sample collection methods in future exploratory drilling projects in pristine environments. The PI is new to Antarctic research.\n", "east": 168.0, "geometry": ["POINT(166.5 -78)"], "keywords": "Andrill; Antarctica; Chemistry:fluid; Chemistry:Fluid; Chemistry:rock; Chemistry:Rock; Drilling Fluid; Geochemistry; McMurdo; Ross Sea; Sediment Core", "locations": "McMurdo; Antarctica; Ross Sea", "north": -77.5, "nsf_funding_programs": null, "persons": "Lenczewski, Melissa", "project_titles": "Fate of Drilling Fluids during the South McMurdo Sound Project (SMS) of the Antarctic Geological Drilling Program (ANDRILL)", "projects": [{"proj_uid": "p0000468", "repository": "USAP-DC", "title": "Fate of Drilling Fluids during the South McMurdo Sound Project (SMS) of the Antarctic Geological Drilling Program (ANDRILL)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "ANDRILL", "south": -78.5, "title": "Fate of Drilling Fluids during the South McMurdo Sound Project (SMS) of the Antarctic Geological Drilling Program (ANDRILL)", "uid": "600129", "west": 165.0}, {"awards": "1045215 Gooseff, Michael", "bounds_geometry": ["POLYGON((160 -77.25,160.5 -77.25,161 -77.25,161.5 -77.25,162 -77.25,162.5 -77.25,163 -77.25,163.5 -77.25,164 -77.25,164.5 -77.25,165 -77.25,165 -77.375,165 -77.5,165 -77.625,165 -77.75,165 -77.875,165 -78,165 -78.125,165 -78.25,165 -78.375,165 -78.5,164.5 -78.5,164 -78.5,163.5 -78.5,163 -78.5,162.5 -78.5,162 -78.5,161.5 -78.5,161 -78.5,160.5 -78.5,160 -78.5,160 -78.375,160 -78.25,160 -78.125,160 -78,160 -77.875,160 -77.75,160 -77.625,160 -77.5,160 -77.375,160 -77.25))"], "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "Intellectual Merit: Until recently, wetted soils in the Dry Valleys were generally only found adjacent to streams and lakes. Since the warm austral summer of 2002, numerous \"wet spots\" have been observed far from shorelines on relatively flat valley floor locations and as downslope fingers of flow on valley walls. The source of the water to wet these soils is unclear, as is the spatial and temporal pattern of occurrence from year to year. Their significance is potentially great as enhanced soil moisture may change the thermodynamics, hydrology, and erosion rate of surface soils, and facilitate transport of materials that had previously been stable. These changes to the soil active layer could significantly modify permafrost and ground ice stability within the Dry Valleys. The PIs seek to investigate these changes to address two competing hypotheses: that the source of water to these ?wet spots? is ground ice melt and that the source of this water is snowmelt. The PIs will document the spatiotemporal dynamics of these wet areas using high frequency remote sensing data from QuickBird and WorldView satellites to document the occurrence, dimensions, and growth of wet spots during the 2010-\u00ad11 and 2011-\u00ad12 austral summers. They will test their hypotheses by determining whether wet spots recur in the same locations in each season, and they will compare present to past distribution using archived imagery. They will also determine whether spatial snow accumulation patterns and temporal ablation patterns are coincident with wet spot formation. Broader impacts: One graduate student will be trained on this project. Findings will be reported at scientific meetings and published in peer reviewed journals. They will also develop a teaching module on remote sensing applications to hydrology for the Modular Curriculum for Hydrologic Advancement and an innovative prototype project designed to leverage public participation in mapping wet spots and snow patches across the Dry Valleys through the use of social media and mobile computing applications.\n", "east": 165.0, "geometry": ["POINT(162.5 -77.875)"], "keywords": "Antarctica; Climate; Critical Zone; Dry Valleys; Radar; Soil Moisture", "locations": "Antarctica; Dry Valleys", "north": -77.25, "nsf_funding_programs": null, "persons": "Gooseff, Michael N.", "project_titles": "EAGER: Are the Dry Valleys Getting Wetter? A Preliminary Assessment of Wetness Across the McMurdo Dry Valleys Landscape", "projects": [{"proj_uid": "p0000471", "repository": "USAP-DC", "title": "EAGER: Are the Dry Valleys Getting Wetter? A Preliminary Assessment of Wetness Across the McMurdo Dry Valleys Landscape"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.5, "title": "Are the Dry Valleys Getting Wetter? A Preliminary Assessment of Wetness Across the McMurdo Dry Valleys Landscape", "uid": "600131", "west": 160.0}, {"awards": "1139739 Hansen, Samantha", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "Intellectual Merit: Numerous candidate models for the geologic processes that have shaped the Antarctic continent have been proposed. To discriminate between them, detailed images of the upper mantle structure are required; however, the only existing continental-scale images of seismic structure beneath Antarctica lack sufficient resolution to delineate important, diagnostic features. Using newly available data from various Antarctic seismic networks, the PI will employ the adaptively parameterized tomography method to develop a high-resolution, continental-scale seismic velocity model for all of Antarctica. The proposed tomography method combines regional seismic travel-time datasets in the context of a global model to create a composite continental-scale model of upper mantle structure. The proposed method allows for imaging of finer structure in areas with better seismic ray coverage while simultaneously limiting the resolution of features in regions with less coverage. This research will help advance understanding of important global processes, such as craton formation, mountain building, continental rifting and associated magmatism. Additionally, the proposed research will have important impacts on other fields of Antarctic science. Constraints provided by tomographic results can be used to develop thermal models of the lithosphere needed to characterize the history and dynamics of ice sheets. Also, further constraints on lithospheric structure are required by climate-ice models, which are focused on understanding the cooling history of the Antarctic continent.\n\nBroader impacts: The PI is a new faculty member at the University of Alabama after having been funded as a National Science Foundation Postdoctoral Fellow in Polar Regions Research. The graduate student supported by this project is new to polar research. Through the UA-Tuscaloosa Magnet School partnership program, the PI will educate K-12 students about the Antarctic environment and associated career opportunities through various online and hands-on activities. University of Alabama dedicates a significant percentage of its enrollment space to underrepresented groups.\n", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Geology/Geophysics - Other; Lithosphere; Seismic Tomography; Solid Earth", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": null, "persons": "Hansen, Samantha", "project_titles": "New Approach to Investigate the Seismic Velocity Structure beneath Antarctica", "projects": [{"proj_uid": "p0000354", "repository": "USAP-DC", "title": "New Approach to Investigate the Seismic Velocity Structure beneath Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "A New Approach to Investigate the Seismic Velocity Structure beneath Antarctica", "uid": "600132", "west": -180.0}, {"awards": "1354231 Kowalewski, Douglas", "bounds_geometry": ["POLYGON((-160 -70,-156 -70,-152 -70,-148 -70,-144 -70,-140 -70,-136 -70,-132 -70,-128 -70,-124 -70,-120 -70,-120 -71.5,-120 -73,-120 -74.5,-120 -76,-120 -77.5,-120 -79,-120 -80.5,-120 -82,-120 -83.5,-120 -85,-124 -85,-128 -85,-132 -85,-136 -85,-140 -85,-144 -85,-148 -85,-152 -85,-156 -85,-160 -85,-160 -83.5,-160 -82,-160 -80.5,-160 -79,-160 -77.5,-160 -76,-160 -74.5,-160 -73,-160 -71.5,-160 -70))"], "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "Intellectual Merit: Neogene sediment records recovered by ANDRILL suggest multiple events of open water conditions and elevated sea surface temperatures at times when terrestrial data from the McMurdo Dry Valleys indicate hyper arid, cold, desert conditions. Interpretation of the ANDRILL data suggests the West Antarctic Ice Sheet is highly sensitive to changes in Pliocene sea surface temperatures and this conclusion has been supported by recent Global Circulation Model results for the early to mid Pliocene. The PIs propose to model paleo-ice configurations and warm orbits associated with a WAIS collapse to assess potential climate change in East Antarctica. During such episodes of polar warmth they propose to answer: What is the limit of ablation along the East Antarctic Ice Sheet?; Are relict landforms in the Dry Valleys susceptible to modification from increase in maximum summertime temperatures?; and Is there sufficient increase in minimum wintertime temperatures to sustain a tundra environment in the Dry Valleys? Integration of depositional records and model outputs have the potential to test the performance of numerical models currently under development as part of ANDRILL; reconcile inconsistencies between marine and terrestrial paleoclimate records in high Southern Latitudes; and improve understanding of Antarctic climate and ice volume sensitivity to forcing for both the East Antarctic and West Antarctic Ice Sheets. Broader impacts: Results from this study have the potential to be used widely by the research community. Outreach to local elementary schools from other funded efforts will continue and be extended to homeschooled students. A Post Doc will be supported as part of this award.\n", "east": -120.0, "geometry": ["POINT(-140 -77.5)"], "keywords": "Antarctica; Atmosphere; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Model Data; Paleoclimate; Transantarctic Mountains", "locations": "Antarctica; Transantarctic Mountains", "north": -70.0, "nsf_funding_programs": null, "persons": "Kowalewski, Douglas", "project_titles": "Validating contrasting terrestrial climate-sensitive Pliocene deposits through high resolution modeling of paleo-environments in the Transantarctic Mountains", "projects": [{"proj_uid": "p0000463", "repository": "USAP-DC", "title": "Validating contrasting terrestrial climate-sensitive Pliocene deposits through high resolution modeling of paleo-environments in the Transantarctic Mountains"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -85.0, "title": "Validating contrasting terrestrial climate-sensitive Pliocene deposits through high resolution modeling of paleo-environments in the Transantarctic Mountains", "uid": "600140", "west": -160.0}, {"awards": "0838996 Hollibaugh, James", "bounds_geometry": ["POLYGON((-79 -63,-77.5 -63,-76 -63,-74.5 -63,-73 -63,-71.5 -63,-70 -63,-68.5 -63,-67 -63,-65.5 -63,-64 -63,-64 -63.8,-64 -64.6,-64 -65.4,-64 -66.2,-64 -67,-64 -67.8,-64 -68.6,-64 -69.4,-64 -70.2,-64 -71,-65.5 -71,-67 -71,-68.5 -71,-70 -71,-71.5 -71,-73 -71,-74.5 -71,-76 -71,-77.5 -71,-79 -71,-79 -70.2,-79 -69.4,-79 -68.6,-79 -67.8,-79 -67,-79 -66.2,-79 -65.4,-79 -64.6,-79 -63.8,-79 -63))"], "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "Ammonia oxidation is the first step in the conversion of regenerated nitrogen to dinitrogen gas, a 3-step pathway mediated by 3 distinct guilds of bacteria and archaea. Ammonia oxidation and the overall process of nitrification-denitrification have received relatively little attention in polar oceans where the effects of climate change on biogeochemical rates are likely to be pronounced. Previous work on Ammonia Oxidizing Archaea (AOA) in the Palmer LTER study area West of the Antarctic Peninsula (WAP), has suggested strong vertical segregation of crenarchaeote metabolism, with the \u0027winter water\u0027 (WW, ~50-100 m depth range) dominated by non-AOA crenarchaeotes, while Crenarchaeota populations in the \u0027circumpolar deep water\u0027 (CDW), which lies immediately below the winter water (150-3500 m), are dominated by AOA. Analysis of a limited number of samples from the Arctic Ocean did not reveal a comparable vertical segregation of AOA, and suggested that AOA and Crenarchaeota abundance is much lower there than in the Antarctic. These findings led to 3 hypotheses that will be tested in this project: 1) the apparent low abundance of Crenarchaeota and AOA in Arctic Ocean samples may be due to spatial or temporal variability in populations; 2) the WW population of Crenarchaeota in the WAP is dominated by a heterotroph; 3) the WW population of Crenarchaeota in the WAP \u0027grows in\u0027 during spring and summer after this water mass forms.\n\nThe study will contribute substantially to understanding an important aspect of the nitrogen cycle in the Palmer LTER (Long Term Ecological Research) study area by providing insights into the ecology and physiology of AOA. The natural segregation of crenarchaeote phenotypes in waters of the WAP, coupled with metagenomic studies in progress in the same area by others (A. Murray, H. Ducklow), offers the possibility of major breakthroughs in understanding of the metabolic capabilities of these organisms. This knowledge is needed to model how water column nitrification will respond to changes in polar ecosystems accompanying global climate change. The Principal Investigator will participate fully in the education and outreach efforts of the Palmer LTER, including making highlights of our findings available for posting to their project web site and participating in outreach (for example, Schoolyard LTER). The research also will involve undergraduates (including the field work if possible) and will support high school interns in the P.I.\u0027s laboratory over the summer.\n", "east": -64.0, "geometry": ["POINT(-71.5 -67)"], "keywords": "Biota; Chemistry:fluid; Chemistry:Fluid; LMG1006; LMG1101; LTER Palmer Station; Oceans; Southern Ocean", "locations": "Southern Ocean", "north": -63.0, "nsf_funding_programs": null, "persons": "Hollibaugh, James T.", "project_titles": "Ammonia Oxidation Versus Heterotrophy in Crenarchaeota Populations from Marine Environments West of the Antarctic Peninsula", "projects": [{"proj_uid": "p0000359", "repository": "USAP-DC", "title": "Ammonia Oxidation Versus Heterotrophy in Crenarchaeota Populations from Marine Environments West of the Antarctic Peninsula"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -71.0, "title": "Ammonia Oxidation Versus Heterotrophy in Crenarchaeota Populations from Marine Environments West of the Antarctic Peninsula", "uid": "600105", "west": -79.0}, {"awards": "0944201 Hofmann, Gretchen", "bounds_geometry": ["POLYGON((-160 -68,-159 -68,-158 -68,-157 -68,-156 -68,-155 -68,-154 -68,-153 -68,-152 -68,-151 -68,-150 -68,-150 -69,-150 -70,-150 -71,-150 -72,-150 -73,-150 -74,-150 -75,-150 -76,-150 -77,-150 -78,-151 -78,-152 -78,-153 -78,-154 -78,-155 -78,-156 -78,-157 -78,-158 -78,-159 -78,-160 -78,-160 -77,-160 -76,-160 -75,-160 -74,-160 -73,-160 -72,-160 -71,-160 -70,-160 -69,-160 -68))"], "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "This research examines the effects of ocean acidification on embryos and larvae of a contemporary calcifier in the coastal waters of Antarctica, the sea urchin Sterechinus neumayeri. The effect of future ocean acidification is projected to be particularly threatening to calcifying marine organisms in coldwater, high latitude seas, making tolerance data on these organisms a critical research need in Antarctic marine ecosystems. Due to a high magnesium (Mg) content of their calcitic hard parts, echinoderms are especially vulnerable to dissolution stress from ocean acidification because they currently inhabit seawater that is barely at the saturation level to support biogenic calcification. Thus, cold-water, high latitude species with a high Mg-content in their hard parts are considered to be the \u0027first responders\u0027 to chemical changes in the surface oceans. Studies in this proposal will use several metrics to examine the physiological plasticity of contemporary urchin embryos and larvae to CO2-acidified seawater, to mimic the scenarios defined by IPCC models and by analyses of future acidification predicted for the Southern Ocean. The research also will investigats the biological consequences of synergistic interactions of two converging climate change-related stressors - CO2- driven ocean acidification and ocean warming. Specifically the research will (1) assess the effect of CO2-acidified seawater on the development of early embryos and larvae, (2) using morphometrics, examine changes in the larval endoskeleton in response to development under the high-CO2 conditions of ocean acidification, (3) using a DNA microarray, profile changes in gene expression for genes involved in biomineralization and other important physiological processes, and (4) measure costs and physiological consequences of development under conditions of ocean acidification. The proposal will support the training of undergraduates, graduate students and a postdoctoral fellow. The PI also will collaborate with the UC Santa Barbara Gevirtz Graduate School of Education to link the biological effects of ocean acidification to the chemical changes expected for the Southern Ocean using the \u0027Science on a Sphere\u0027 technology. This display will be housed in an education and public outreach center, the Outreach Center for Teaching Ocean Science (OCTOS), a new state-of-the-art facility under construction at UC Santa Barbara.\n", "east": -150.0, "geometry": ["POINT(-155 -73)"], "keywords": "Antarctica; Biota; Oceans; Southern Ocean", "locations": "Antarctica; Southern Ocean", "north": -68.0, "nsf_funding_programs": null, "persons": "Hofmann, Gretchen", "project_titles": "Effect of Ocean Acidification on Early Life History Stages of the Antarctic Sea Urchins Sterechinus Neumayeri", "projects": [{"proj_uid": "p0000352", "repository": "USAP-DC", "title": "Effect of Ocean Acidification on Early Life History Stages of the Antarctic Sea Urchins Sterechinus Neumayeri"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Effect of Ocean Acidification on Early Life History Stages of the Antarctic Sea Urchins Sterechinus Neumayeri", "uid": "600112", "west": -160.0}, {"awards": "0944220 Ponganis, Paul", "bounds_geometry": ["POLYGON((-160 -68,-159 -68,-158 -68,-157 -68,-156 -68,-155 -68,-154 -68,-153 -68,-152 -68,-151 -68,-150 -68,-150 -69,-150 -70,-150 -71,-150 -72,-150 -73,-150 -74,-150 -75,-150 -76,-150 -77,-150 -78,-151 -78,-152 -78,-153 -78,-154 -78,-155 -78,-156 -78,-157 -78,-158 -78,-159 -78,-160 -78,-160 -77,-160 -76,-160 -75,-160 -74,-160 -73,-160 -72,-160 -71,-160 -70,-160 -69,-160 -68))"], "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "Emperor penguins (Aptenodytes forsteri) and leopard seals (Hydrurga leptonyx) are iconic, top predators in Antarctica. Understanding their physiological ecology is essential to the assessment of their adaptability to the threats of climate change, pollution, and overfishing. The proposed research has multipronged objectives. Prior results suggest that Emperor penguins have flexible (vs. static) aerobic dive limits (ADL) that vary with the type of dive, and that the role of heart rate in utilization of oxygen stores also varies with dive type. A series of physiological measurements are proposed with backpack electrocardiogram recorders, that will allow further delineation of patterns and interrelationships among heart rate, dive behavior, and oxygen stores. Importantly, the research will be done on free diving emperors, and not individuals confined to a dive hole, thereby providing a more genuine measure of diving physiology and behavior. A separate objective is to examine foraging behavior of leopard seals, using a backpack digital camera and time depth recorder. Leopard seal behavior and prey intake is poorly quantified, but known to be significant. Accordingly the research is somewhat exploratory but will provide important baseline data. Finally, the P.I. proposes to continue long term overflight censuses of Emperor penguin colonies in the Ross Sea. Broader impacts include collaboration with National Geographic television, graduate student training, and development of sedation techniques for leopard seals.\n", "east": -150.0, "geometry": ["POINT(-155 -73)"], "keywords": "Antarctica; Biota; Electrocardiogram; Penguin; Southern Ocean", "locations": "Antarctica; Southern Ocean", "north": -68.0, "nsf_funding_programs": null, "persons": "Ponganis, Paul", "project_titles": "The Physiological Ecology of Two Antarctic Icons: Emperor Penguins and Leopard Seals", "projects": [{"proj_uid": "p0000349", "repository": "USAP-DC", "title": "The Physiological Ecology of Two Antarctic Icons: Emperor Penguins and Leopard Seals"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "The Physiological Ecology of Two Antarctic Icons: Emperor Penguins and Leopard Seals", "uid": "600113", "west": -160.0}, {"awards": "1244253 Hammer, William", "bounds_geometry": ["POLYGON((-165 -85,-164.5 -85,-164 -85,-163.5 -85,-163 -85,-162.5 -85,-162 -85,-161.5 -85,-161 -85,-160.5 -85,-160 -85,-160 -85.2,-160 -85.4,-160 -85.6,-160 -85.8,-160 -86,-160 -86.2,-160 -86.4,-160 -86.6,-160 -86.8,-160 -87,-160.5 -87,-161 -87,-161.5 -87,-162 -87,-162.5 -87,-163 -87,-163.5 -87,-164 -87,-164.5 -87,-165 -87,-165 -86.8,-165 -86.6,-165 -86.4,-165 -86.2,-165 -86,-165 -85.8,-165 -85.6,-165 -85.4,-165 -85.2,-165 -85))"], "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "This proposal requests support for research on Early Jurassic vertebrate fauna of the Beardmore Glacier region of Antarctica. The project will support preparation and systematic and paleobiological research on four Antarctic dinosaurs, including two new species, collected in the Central Transantarctic Mountains. With the new material Cryolophosaurus will become one of the most complete Early Jurassic theropods known, and thus has the potential to become a keystone taxon for resolving the debated early evolutionary history of theropod dinosaurs, the group that gave rise to birds. Two new dinosaur specimens include a nearly complete articulated skeleton of a juvenile sauropodomorph, and the articulated hip region of another small individual. Both appear to be new taxa. The dinosaurs from the Hanson Formation represent some of the highest paleolatitude vertebrates known from the Jurassic. The PIs will generate CT datasets for Cryolophosaurus and the more complete new sauropodomorph species to mine for phylogenetic trait information, and to investigate their comparative neuroanatomy and feeding behavior. Histological datasets will be generated from multiple skeletal elements for all four Mt. Kirkpatrick taxa to understand patterns of growth in different clades of polar dinosaurs and compare them to relatives from lower paleolatitudes. This paleohistological study of a relatively diverse sample of sauropodomorph taxa from Antarctica may contribute to determining whether and how these dinosaurs responded to contemporary climatic extremes.\n\nThe PIs have established a successful undergraduate training program as part of previous research. Summer interns from Augustana are trained at the Field Museum in specimen preparation, curation, molding/casting, and histological sampling. They also participate in existing Field Museum REU programs, including a course on phylogenetic systematics. Four undergraduate internships and student research projects will be supported through this proposal. The PIs will develop a traveling exhibit on Antarctic Mesozoic paleontology that they estimate will be seen by 2.5 million people over the five-year tour.\n", "east": -160.0, "geometry": ["POINT(-162.5 -86)"], "keywords": "Antarctica; Beardmore Glacier; Biota; Dinosaurs; Fossil; Transantarctic Mountains", "locations": "Beardmore Glacier; Transantarctic Mountains; Antarctica", "north": -85.0, "nsf_funding_programs": null, "persons": "Hammer, William R.", "project_titles": "Collaborative Research: Continued Research on the Jurassic Vertebrate Fauna from the Beardmore Glacier Region of Antarctica", "projects": [{"proj_uid": "p0000083", "repository": "USAP-DC", "title": "Collaborative Research: Continued Research on the Jurassic Vertebrate Fauna from the Beardmore Glacier Region of Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -87.0, "title": "Continued Research on the Jurassic Vertebrate Fauna from the Beardmore Glacier Region of Antarctica", "uid": "600173", "west": -165.0}, {"awards": "1019305 Grim, Jeffrey", "bounds_geometry": null, "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "Survival of Antarctic notothenioid fishes in the context of global climate change will depend upon the impact of rising oceanic temperatures on their embryonic development, yet little is known regarding the molecular mechanisms underlying this complex suite of processes. Many notothenioids are characterized by secondary pelagicism, which enables them to exploit food sources in the water column and is supported in part by skeletal pedomorphism. Here the PI proposes to examine the hypothesis that reactive oxygen species (ROS) regulate notothenioid skeletal pedomorphism. The research objectives are : 1) To quantify and localize ROS production and identify the point(s) of origin of ROS production in embryonic Antarctic fishes that differ in skeletal phenotypes 2) To determine whether the time course of embryogenesis and the extent of osteological development in embryonic Antarctic fishes can be altered by changing the oxidative status of the animal during embryogenesis 3) To evaluate whether transgenic alteration of oxidative status can induce skeletal pedomorphism in a fish model. Broader Impacts will include teaching undergraduate lectures, recruiting undergraduate students to help with lab analyses (and possibly field work), lectures and demonstrations to high school students, and allowing secondary educators access to personal photos and videos of research animals for curriculum development.", "east": null, "geometry": null, "keywords": "Biota; Fish Logs; LMG1203; LMG1204; LMG1205; Oceans; Pot; Southern Ocean; Trawl", "locations": "Southern Ocean", "north": null, "nsf_funding_programs": null, "persons": "Grim, Jeffrey", "project_titles": "PostDoctoral Research Fellowship", "projects": [{"proj_uid": "p0000482", "repository": "USAP-DC", "title": "PostDoctoral Research Fellowship"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Impact of Rising Oceanic Temperatures on the Embryonic Development of Antarctic Notothenioid Fishes", "uid": "600119", "west": null}, {"awards": "0838849 Bender, Michael", "bounds_geometry": ["POLYGON((159.16667 -76.66667,159.19167 -76.66667,159.21667 -76.66667,159.24167 -76.66667,159.26667 -76.66667,159.29167 -76.66667,159.31667 -76.66667,159.34167 -76.66667,159.36667 -76.66667,159.39167 -76.66667,159.41667 -76.66667,159.41667 -76.673336,159.41667 -76.680002,159.41667 -76.686668,159.41667 -76.693334,159.41667 -76.7,159.41667 -76.706666,159.41667 -76.713332,159.41667 -76.719998,159.41667 -76.726664,159.41667 -76.73333,159.39167 -76.73333,159.36667 -76.73333,159.34167 -76.73333,159.31667 -76.73333,159.29167 -76.73333,159.26667 -76.73333,159.24167 -76.73333,159.21667 -76.73333,159.19167 -76.73333,159.16667 -76.73333,159.16667 -76.726664,159.16667 -76.719998,159.16667 -76.713332,159.16667 -76.706666,159.16667 -76.7,159.16667 -76.693334,159.16667 -76.686668,159.16667 -76.680002,159.16667 -76.673336,159.16667 -76.66667))"], "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "This award supports a project to generate an absolute timescale for the Allan Hills Blue Ice Area (BIA), and then to reconstruct details of past climate changes and greenhouse gas concentrations for certain time periods back to 2.5 Ma. Ice ages will be determined by applying emerging methods for absolute and relative dating of trapped air bubbles (based on Argon-40/Argon-38, delta-18O of O2, and the O2/N2 ratio). To demonstrate the potential of the Allan Hills BIAs as a paleoclimate archive trenches and ice cores will be collected for age intervals corresponding to 110-140 ka, 1 Ma, and 2.5 Ma. During the proposed two field seasons a total of 6x100 m and additional 15 m cores will be combined with trenching. The intellectual merit of the proposed activity is that the results of this work will extend the landmark work of EPICA and other deep ice coring efforts, which give records dating back to 0.8 Ma, and will complement work planned by IPICS to drill a continuous Antarctic ice core extending to 1.5 Ma. The results will help to advance understanding of major climate regimes and transitions that took place between 0-2.5 Ma, including the 40 kyr world and the mid-Pleistocene climate transition. A major long-term scientific goal is to provide a transformative approach to the collection of paleoclimate records by establishing an \u0027International Climate Park\u0027 in the Allan Hills BIA that would enable sampling of large quantities of known age ice as old as 2.5 Ma, by any interested American or foreign investigator. The broader impacts resulting from the proposed activity include training students who are well versed in advanced field, laboratory and numerical modeling methods combining geochemistry, glaciology, and paleoclimatology. We will include material relevant to our proposed research in our ongoing efforts in local education and in our outreach efforts for media. The University of Maine already has cyberinfrastructure, using state of the art web-based technology, which can provide a wide community of scientists with fast access to the results of our research. The work will contribute to the broad array of climate change studies that is informing worldwide understanding of natural and anthropogenic forced climate change, and the options for responding. This award has field work in Antarctica.\n", "east": 159.41667, "geometry": ["POINT(159.29167 -76.7)"], "keywords": "Allan Hills; Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Ice Core Records; Paleoclimate; Solid Earth", "locations": "Allan Hills; Antarctica", "north": -76.66667, "nsf_funding_programs": null, "persons": "Bender, Michael", "project_titles": "Collaborative Research: Exploring A 2 Million + Year Ice Climate Archive-Allan Hills Blue Ice Area (2MBIA)", "projects": [{"proj_uid": "p0000046", "repository": "USAP-DC", "title": "Collaborative Research: Exploring A 2 Million + Year Ice Climate Archive-Allan Hills Blue Ice Area (2MBIA)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.73333, "title": "Exploring A 2 Million + Year Ice Climate Archive-Allan Hills Blue Ice Area (2MBIA)", "uid": "600099", "west": 159.16667}, {"awards": "1043619 Hemming, Sidney", "bounds_geometry": ["POLYGON((-180 -63.997,-179.7982 -63.997,-179.5964 -63.997,-179.3946 -63.997,-179.1928 -63.997,-178.991 -63.997,-178.7892 -63.997,-178.5874 -63.997,-178.3856 -63.997,-178.1838 -63.997,-177.982 -63.997,-177.982 -66.3324,-177.982 -68.6678,-177.982 -71.0032,-177.982 -73.3386,-177.982 -75.674,-177.982 -78.0094,-177.982 -80.3448,-177.982 -82.6802,-177.982 -85.0156,-177.982 -87.351,-178.1838 -87.351,-178.3856 -87.351,-178.5874 -87.351,-178.7892 -87.351,-178.991 -87.351,-179.1928 -87.351,-179.3946 -87.351,-179.5964 -87.351,-179.7982 -87.351,180 -87.351,172.54273 -87.351,165.08546 -87.351,157.62819 -87.351,150.17092 -87.351,142.71365 -87.351,135.25638 -87.351,127.79911 -87.351,120.34184 -87.351,112.88457 -87.351,105.4273 -87.351,105.4273 -85.0156,105.4273 -82.6802,105.4273 -80.3448,105.4273 -78.0094,105.4273 -75.674,105.4273 -73.3386,105.4273 -71.0032,105.4273 -68.6678,105.4273 -66.3324,105.4273 -63.997,112.88457 -63.997,120.34184 -63.997,127.79911 -63.997,135.25638 -63.997,142.71365 -63.997,150.17092 -63.997,157.62819 -63.997,165.08546 -63.997,172.54273 -63.997,-180 -63.997))"], "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "Intellectual Merit: The PIs proposed a provenance study of glacial deposits in the Ross Embayment that will provide a broad scale geochronologic survey of detrital minerals in till to help characterize bedrock beneath the East Antarctic ice sheet and constrain Antarctica?s glacial history. This project capitalizes on previous investments in field sampling. Analytical tools applied to single mineral grains extracted from existing collections of glacial till will generate ?fingerprints? of East Antarctic outlet glaciers and West Antarctic till to refine paleo-ice flow models for the Ross Embayment during the last glacial maximum, older records from ANDRILL cores, and to assess IRD sources in the Southern Ocean. New provenance tracers will include a suite of geochronological methods that together provide greater insights into the orogenic and erosional history the region. This project will include U/Pb of detrital zircons, (U-Th)/He on a subset of the U/Pb dated zircons, as well as Ar-Ar of detrital hornblende, mica and feldspars.\nBroader Impacts: This research will train one M.S. student at IUPUI, a Ph.D. student at Columbia, and several undergraduates at both institutions. Graduate students involved in the project will be involved in mentoring undergraduate researchers. Incorporation of research discoveries will be brought into the classroom by providing concrete examples and exercises at the appropriate level. Licht and Columbia graduate student E. Pierce are developing outreach projects with local secondary school teachers to investigate the provenance of glacial materials in their local areas. The research will have broad applicability to many fields.", "east": 105.4273, "geometry": ["POINT(143.72265 -75.674)"], "keywords": "Antarctica; East Antarctica; Geochemistry; Ross Sea; Sample/collection Description; Sample/Collection Description; Solid Earth; Southern Ocean; West Antarctica", "locations": "West Antarctica; East Antarctica; Ross Sea; Antarctica; Southern Ocean", "north": -63.997, "nsf_funding_programs": null, "persons": "Hemming, Sidney R.", "project_titles": "Collaborative Research: East Antarctic outlet glacier contributions to the Ross Sea from chronology of detrital grains", "projects": [{"proj_uid": "p0000333", "repository": "USAP-DC", "title": "Collaborative Research: East Antarctic outlet glacier contributions to the Ross Sea from chronology of detrital grains"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -87.351, "title": "East Antarctic outlet glacier contributions to the Ross Sea from chronology of detrital grains", "uid": "600124", "west": -177.982}, {"awards": "0732983 Vernet, Maria", "bounds_geometry": ["POLYGON((-66 -62,-65.3 -62,-64.6 -62,-63.9 -62,-63.2 -62,-62.5 -62,-61.8 -62,-61.1 -62,-60.4 -62,-59.7 -62,-59 -62,-59 -62.8,-59 -63.6,-59 -64.4,-59 -65.2,-59 -66,-59 -66.8,-59 -67.6,-59 -68.4,-59 -69.2,-59 -70,-59.7 -70,-60.4 -70,-61.1 -70,-61.8 -70,-62.5 -70,-63.2 -70,-63.9 -70,-64.6 -70,-65.3 -70,-66 -70,-66 -69.2,-66 -68.4,-66 -67.6,-66 -66.8,-66 -66,-66 -65.2,-66 -64.4,-66 -63.6,-66 -62.8,-66 -62))"], "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach - Marine Ecosystems. A profound transformation in ecosystem structure and function is occurring in coastal waters of the western Weddell Sea, with the collapse of the Larsen B ice shelf. This transformation appears to be yielding a redistribution of energy flow between chemoautotrophic and photosynthetic production, and to be causing the rapid demise of the extraordinary seep ecosystem discovered beneath the ice shelf. This event provides an ideal opportunity to examine fundamental aspects of ecosystem transition associated with climate change. We propose to test the following hypotheses to elucidate the transformations occurring in marine ecosystems as a consequence of the Larsen B collapse: (1) The biogeographic isolation and sub-ice shelf setting of the Larsen B seep has led to novel habitat characteristics, chemoautotrophically dependent taxa and functional adaptations. (2) Benthic communities beneath the former Larsen B ice shelf are fundamentally different from assemblages at similar depths in the Weddell sea-ice zone, and resemble oligotrophic deep-sea communities. Larsen B assemblages are undergoing rapid change. (3) The previously dark, oligotrophic waters of the Larsen B embayment now support a thriving phototrophic community, with production rates and phytoplankton composition similar to other productive areas of the Weddell Sea. To document rapid changes occurring in the Larsen B ecosystem, we will use a remotely operated vehicle, shipboard samplers, and moored sediment traps. We will characterize microbial, macrofaunal and megafaunal components of the seep community; evaluate patterns of surface productivity, export flux, and benthic faunal composition in areas previously covered by the ice shelf, and compare these areas to the open sea-ice zone. These changes will be placed within the geological, glaciological and climatological context that led to ice-shelf retreat, through companion research projects funded in concert with this effort. Together these projects will help predict the likely consequences of ice-shelf collapse to marine ecosystems in other regions of Antarctica vulnerable to climate change. The research features international collaborators from Argentina, Belgium, Canada, Germany, Spain and the United Kingdom. The broader impacts include participation of a science writer; broadcast of science segments by members of the Jim Lehrer News Hour (Public Broadcasting System); material for summer courses in environmental change; mentoring of graduate students and postdoctoral fellows; and showcasing scientific activities and findings to students and public through podcasts.\n", "east": -59.0, "geometry": ["POINT(-62.5 -66)"], "keywords": "Antarctica; Antarctic Peninsula; Araon1304; Biota; LARISSA; Larsen B Ice Shelf; NBP1001; NBP1203; Oceans; Physical Oceanography; Southern Ocean; Weddell Sea", "locations": "Larsen B Ice Shelf; Weddell Sea; Southern Ocean; Antarctic Peninsula; Antarctica", "north": -62.0, "nsf_funding_programs": null, "persons": "Vernet, Maria", "project_titles": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans", "projects": [{"proj_uid": "p0000101", "repository": "USAP-DC", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "LARISSA", "south": -70.0, "title": "Abrupt Environmental Change in the Larsen Ice Shelf System (LARISSA) - Marine Ecosystems", "uid": "600073", "west": -66.0}, {"awards": "0732804 McPhee, Miles", "bounds_geometry": ["POINT(166.25 -77.42)"], "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "The Office of Polar Programs, Antarctic Integrated and System Science Program has made this award to support an interdisciplinary study of the effects of the ocean on the stability of glacial ice in the most dynamic region the West Antarctic Ice Sheet, namely the Pine Island Glacier in the Amundsen Sea Embayment. The collaborative project builds on the knowledge gained by the highly successful West Antarctic Ice Sheet program and is being jointly sponsored with NASA. Recent observations indicate a significant ice loss, equivalent to 10% of the ongoing increase in sea-level rise, in this region. These changes are largest along the coast and propagate rapidly inland, indicating the critical impact of the ocean on ice sheet stability in the region. While a broad range of remote sensing and ground-based instrumentation is available to characterize changes of the ice surface and internal structure (deformation, ice motion, melt) and the shape of the underlying sediment and rock bed, instrumentation has yet to be successfully deployed for observing boundary layer processes of the ocean cavity which underlies the floating ice shelf and where rapid melting is apparently occurring. Innovative, mini ocean sensors that can be lowered through boreholes in the ice shelf (about 500 m thick) will be developed and deployed to automatically provide ocean profiling information over at least three years. Their data will be transmitted through a conducting cable frozen in the borehole to the surface where it will be further transmitted via satellite to a laboratory in the US. Geophysical and remote sensing methods (seismic, GPS, altimetry, stereo imaging, radar profiling) will be applied to map the geometry of the ice shelf, the shape of the sub ice-shelf cavity, the ice surface geometry and deformations within the glacial ice. To integrate the seismic, glaciological and oceanographic observations, a new 3-dimensional coupled ice-ocean model is being developed which will be the first of its kind. NASA is supporting satellite based research and the deployment of a robotic-camera system to explore the environment in the ocean cavity underlying the ice shelf and NSF is supporting all other aspects of this study. \n\nBroader impacts: This project is motivated by the potential societal impacts of rapid sea level rise and should result in critically needed improvements in characterizing and predicting the behavior of coupled ocean-ice systems. It is a contribution to the International Polar Year and was endorsed by the International Council for Science as a component of the \u0027Multidisciplinary Study of the Amundsen Sea Embayment\u0027 proposal #258 of the honeycomb of endorsed IPY activities. The research involves substantial international partnerships with the British Antarctic Survey and the University of Bristol in the UK. The investigators will partner with the previously funded \u0027Polar Palooza\u0027 education and outreach program in addition to undertaking a diverse set of outreach activities of their own. Eight graduate students and one undergraduate as well as one post doc will be integrated into this research project.\n", "east": 166.25, "geometry": ["POINT(166.25 -77.42)"], "keywords": "Antarctica; Atmosphere; McMurdo; Meteorology; Oceans; Ross Island; Southern Ocean", "locations": "Ross Island; Antarctica; McMurdo; Southern Ocean", "north": -77.42, "nsf_funding_programs": null, "persons": "McPhee, Miles G.", "project_titles": "Collaborative Research; IPY: Ocean-Ice Interaction in the Amundsen Sea sector of West Antarctica", "projects": [{"proj_uid": "p0000043", "repository": "USAP-DC", "title": "Collaborative Research; IPY: Ocean-Ice Interaction in the Amundsen Sea sector of West Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.42, "title": "Ocean-Ice Interaction in the Amundsen Sea Sector of West Antarctica", "uid": "600072", "west": 166.25}, {"awards": "1043690 Scherer, Reed", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "Intellectual Merit: Diatom abundance in sediment cores is typically used as a proxy for paleo primary productivity. This record is complicated by variable preservation, with most loss occurring in the water column via dissolution and zooplankton grazing. This study will investigate preservational biases via a series of controlled experiments to create proxies of original productivity based on morphological changes associated with diatom dissolution and fracture. The PIs will utilize fresh diatoms from culture. Specific objectives include: (1) Linking changes in diatom morphology to availability of dissolved silica and other physical and chemical parameters; (2) Documenting the dissolution process under controlled conditions; (3) Assessment of changes in morphology and diatom surface roughness with increased dissolution; (4) Documenting the physical effects of grazing and fecal pellet formation on diatom fragmentation and dissolution; and (5) Analyzing the impact of diatom dissolution on silica and carbon export. These objectives will be achieved by growing Southern Ocean diatom species in the laboratory under differing physical and chemical conditions; controlled serial dissolution experiments on cultured diatoms; analysis of the dissolution process by imaging frustules under scanning electron microscopy (SEM) and with micro-analysis of surface texture by atomic force microscopy (AFM); making the cultures available to krill and other live zooplankton crustaceans in order to analyze the specific effects of grazing and pelletization on diatom morphology; and comparing experimental results with natural plankton, sediment trap material, and selected Holocene, Pleistocene and Pliocene sediment core material.\nBroader impacts: This work will contribute to understanding of the use of diatom abundance as an indicator of paleoproductivity. The proposed experiments are multi-disciplinary in nature. Importantly, the project was designed, and the proposal largely written, by a Ph.D. candidate. The research proposed here will lead to peer-reviewed publications and provide a base for future studies over the course of an extremely promising scientific career. The project will also support an undergraduate research student at NIU. The PI is heavily involved in science outreach, including classroom visits, museum events and webinars related to evolution and climate change, and is active with NSF-funded outreach activities linked to the ANDRILL and WISSARD programs. He will continue these efforts with this project.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Biota; Diatom; Marine Sediments; Oceans; Sediment Core; Southern Ocean", "locations": "Antarctica; Southern Ocean", "north": -60.0, "nsf_funding_programs": null, "persons": "Haji-Sheikh, Michael; Scherer, Reed Paul", "project_titles": "Southern Ocean Diatom Taphonomy and Paleoproductivity: A Laboratory Study of Silica Degradation and Export", "projects": [{"proj_uid": "p0000360", "repository": "USAP-DC", "title": "Southern Ocean Diatom Taphonomy and Paleoproductivity: A Laboratory Study of Silica Degradation and Export"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Southern Ocean Diatom Taphonomy and Paleoproductivity: A Laboratory Study of Silica Degradation and Export", "uid": "600127", "west": -180.0}, {"awards": "0636731 Bender, Michael", "bounds_geometry": ["POLYGON((-180 -72.6,-176.887 -72.6,-173.774 -72.6,-170.661 -72.6,-167.548 -72.6,-164.435 -72.6,-161.322 -72.6,-158.209 -72.6,-155.096 -72.6,-151.983 -72.6,-148.87 -72.6,-148.87 -73.533,-148.87 -74.466,-148.87 -75.399,-148.87 -76.332,-148.87 -77.265,-148.87 -78.198,-148.87 -79.131,-148.87 -80.064,-148.87 -80.997,-148.87 -81.93,-151.983 -81.93,-155.096 -81.93,-158.209 -81.93,-161.322 -81.93,-164.435 -81.93,-167.548 -81.93,-170.661 -81.93,-173.774 -81.93,-176.887 -81.93,180 -81.93,174.335 -81.93,168.67 -81.93,163.005 -81.93,157.34 -81.93,151.675 -81.93,146.01 -81.93,140.345 -81.93,134.68 -81.93,129.015 -81.93,123.35 -81.93,123.35 -80.997,123.35 -80.064,123.35 -79.131,123.35 -78.198,123.35 -77.265,123.35 -76.332,123.35 -75.399,123.35 -74.466,123.35 -73.533,123.35 -72.6,129.015 -72.6,134.68 -72.6,140.345 -72.6,146.01 -72.6,151.675 -72.6,157.34 -72.6,163.005 -72.6,168.67 -72.6,174.335 -72.6,-180 -72.6))"], "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "This project studies ancient ice buried in the Dry Valleys of Antarctica. The ice, which may approach ten million years in age, will be dated using argon and uranium radioisotope techniques. High-risk work, if successful it will offer the first and perhaps only samples of the Earth\u0027s atmosphere from millions of years in the past. These samples could offer critically important tests of paleoclimate records and proxies, as well as a glimpse into the characteristics of a past world much like the predicted future, warmer Earth. The broader impacts are graduate student education, and potentially contributing to society\u0027s understanding of global climate change and sea level rise.\n", "east": 123.35, "geometry": ["POINT(167.24 -77.265)"], "keywords": "Antarctica; Dry Valleys; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Isotope Record; Lake Vostok; Paleoclimate", "locations": "Antarctica; Lake Vostok; Dry Valleys", "north": -72.6, "nsf_funding_programs": null, "persons": "Bender, Michael", "project_titles": "Collaborative Research: Dating and Paleoenvironmental Studies on Ancient Ice in the Dry Valleys, Antarctica", "projects": [{"proj_uid": "p0000039", "repository": "USAP-DC", "title": "Collaborative Research: Dating and Paleoenvironmental Studies on Ancient Ice in the Dry Valleys, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -81.93, "title": "Dating and Paleoenvironmental Studies on Ancient Ice in the Dry Valleys, Antarctica", "uid": "600069", "west": -148.87}, {"awards": "1043700 Harry, Dennis", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "Intellectual Merit: This research will place the subsidence history of the southern Victoria Land Basin into a quantitative geodynamic context and will assess the influence of flexure associated with late Neogene volcanic loading of the crust by the Erebus Volcanic Group. This will be done by extending geodynamic models of extension in the West Antarctic Rift System to include extensional hiatuses hypothesized to have occurred during the Late Paleogene and Miocene, and by developing a new geodynamic model of volcanic loading and associated lithosphere flexure. Finite element and finite difference modeling methods will be used. In the first phase of the project, a series of extensional geodynamic models will be developed to examine the effect that proposed extensional hiatuses have on the style of extension, with emphasis placed on developing a process based understanding of the change in rift style from diffuse during the Late Cretaceous to more focused during the Cenozoic. The models will test the hypotheses that extensional hiatuses led to the change in rifting style, and will place constraints on the timing and duration of the hiatuses. The second phase of the project will use the thermal and rheological properties of the previous models to constrain the flexural rigidity of the lithosphere in order to model the flexural response to volcanic loading to test the hypotheses that flexural subsidence contributed to cyclic changes between grounded and floating ice at the ANDRILL AND-1A site, complicating interpretations of the climatic record from this core, and that flexure contributes to the stress orientation at the AND-2B site, which is inconsistent with the expected regional extensional stress orientation. Broader impacts: The project will train an undergraduate student and an M.S. student. Outreach activities include a planned series of talks at regional high schools, junior colleges, and 4-year colleges that have geology programs.\n", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Andrill; Antarctica; Continental Rift; Geology/Geophysics - Other; Lithosphere; Model; Ross Sea; Solid Earth; Tectonic; Transantarctic Mountains", "locations": "Antarctica; Ross Sea; Transantarctic Mountains", "north": -60.0, "nsf_funding_programs": null, "persons": "Harry, Dennis L.", "project_titles": "Geodynamic Models of Subsidence and Lithospheric Flexure at the ANDRILL Drill Sites: Implications for Cenozoic Tectonics and Ice Sheet History", "projects": [{"proj_uid": "p0000467", "repository": "USAP-DC", "title": "Geodynamic Models of Subsidence and Lithospheric Flexure at the ANDRILL Drill Sites: Implications for Cenozoic Tectonics and Ice Sheet History"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "ANDRILL", "south": -90.0, "title": "Geodynamic Models of Subsidence and Lithospheric Flexure at the ANDRILL Drill Sites: Implications for Cenozoic Tectonics and Ice Sheet History", "uid": "600128", "west": -180.0}, {"awards": "0944475 Kaplan, Michael", "bounds_geometry": ["POLYGON((-180 -84.1,-176.97 -84.1,-173.94 -84.1,-170.91 -84.1,-167.88 -84.1,-164.85 -84.1,-161.82 -84.1,-158.79 -84.1,-155.76 -84.1,-152.73 -84.1,-149.7 -84.1,-149.7 -84.43,-149.7 -84.76,-149.7 -85.09,-149.7 -85.42,-149.7 -85.75,-149.7 -86.08,-149.7 -86.41,-149.7 -86.74,-149.7 -87.07,-149.7 -87.4,-152.73 -87.4,-155.76 -87.4,-158.79 -87.4,-161.82 -87.4,-164.85 -87.4,-167.88 -87.4,-170.91 -87.4,-173.94 -87.4,-176.97 -87.4,180 -87.4,178.12 -87.4,176.24 -87.4,174.36 -87.4,172.48 -87.4,170.6 -87.4,168.72 -87.4,166.84 -87.4,164.96 -87.4,163.08 -87.4,161.2 -87.4,161.2 -87.07,161.2 -86.74,161.2 -86.41,161.2 -86.08,161.2 -85.75,161.2 -85.42,161.2 -85.09,161.2 -84.76,161.2 -84.43,161.2 -84.1,163.08 -84.1,164.96 -84.1,166.84 -84.1,168.72 -84.1,170.6 -84.1,172.48 -84.1,174.36 -84.1,176.24 -84.1,178.12 -84.1,-180 -84.1))"], "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "Intellectual Merit: The proposed work will investigate changes in the compositional variation of glacial tills over time across two concentric sequences of Pleistocene moraines located adjacent to the heads of East Antarctic outlet glaciers in the Transantarctic Mountains (TAM). The chronologic framework for this work will be generated from cosmogenic exposure ages of boulders on prominent morainal ridges. The PIs hypothesize that variations in till composition may indicate a change in ice flow direction or a change in the composition of the original source area, while ages of the moraines provide a long-term terrestrial perspective on ice sheet dynamics. Both results are vital for modeling experiments that aim to reconstruct the East Antarctic Ice Sheet and assess its role in the global climate system and its potential impact on global sea level rise. The variation of till compositions through time also allows for a more accurate interpretation of sediment cores from the Ross Sea and the Southern Ocean. Additionally, till exposures at the head of some East Antarctic outlet glaciers have been shown to contain subglacial material derived from East Antarctic bedrock, providing a window through the ice to view East Antarctica\u0027s inaccessible bedrock. Till samples will be collected from two well-preserved sequences of moraine crests at Mt. Howe (head of Scott Glacier) and Mt. Achernar (between Beardmore and Nimrod Glaciers). Each size fraction in glacial till provides potentially valuable information, and the PIs will measure the petrography of the clast and sand fractions, quantitative X-ray diffraction on the crushed \u003c2mm fraction, elemental abundance of the silt/clay fraction, and U/Pb of detrital zircons in the sand fraction. Data collection will rely on established methods previously used in this region and the PIs will also explore new methods to assess their efficacy. On the same moraines crests sampled for provenance studies, the PIs will sample for cosmogenic surface exposure analyses to provide a chronologic framework at the sites for provenance changes through time.\nBroader Impact: The proposed research involves graduate and undergraduate training in a diverse array of laboratory methods. Students and PIs will be make presentations to community and campus groups, as well as conduct interviews with local news outlets. The proposed work also establishes a new, potentially long-term, collaboration between scientists at IUPUI and LDEO and brings a new PI (Kaplan) into the field of Antarctic Earth Sciences.", "east": -149.7, "geometry": ["POINT(-174.25 -85.75)"], "keywords": "Antarctica; Cosmogenic Dating; Sample/collection Description; Sample/Collection Description; Solid Earth; Transantarctic Mountains", "locations": "Transantarctic Mountains; Antarctica", "north": -84.1, "nsf_funding_programs": null, "persons": "Kaplan, Michael", "project_titles": "Collaborative Research: Pleistocene East Antarctic Ice Sheet History as Recorded in Sediment Provenance and Chronology of High-elevation TAM Moraines", "projects": [{"proj_uid": "p0000459", "repository": "USAP-DC", "title": "Collaborative Research: Pleistocene East Antarctic Ice Sheet History as Recorded in Sediment Provenance and Chronology of High-elevation TAM Moraines"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -87.4, "title": "Pleistocene East Antarctic Ice Sheet History as Recorded in Sediment Provenance and Chronology of High-elevation TAM Moraines", "uid": "600115", "west": 161.2}, {"awards": "0838970 Foreman, Christine", "bounds_geometry": ["POINT(161.667 -77.117)"], "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "Dissolved organic matter (DOM) comprises a significant pool of Earth\u0027s organic carbon that dwarfs the amount present in living aquatic organisms. The properties and reactivity of DOM are not well defined, and the evolution of autochthonous DOM from its precursor materials in freshwater has not been observed. Recent sampling of a supraglacial stream formed on the Cotton Glacier in the Transantarctic Mountains revealed DOM that more closely resembles an assemblage of recognizable precursor organic compounds, based upon its UV-VIS and fluorescence spectra. It is suggested that the DOM from this water evolved over time to resemble materials present in marine and many inland surface waters. The transient nature of the system i.e., it reforms seasonally, also prevents any accumulation of the refractory DOM present in most surface waters. Thus, the Cotton Glacier provides us with a unique environment to study the formation of DOM from precursor materials. An interdisciplinary team will study the biogeochemistry of this progenitor DOM and how microbes modify it. By focusing on the chemical composition of the DOM as it shifts from precursor material to the more humified fractions, the investigators will relate this transition to bioavailability, enzymatic activity, community composition and microbial growth efficiency. This project will support education at all levels, K-12, high school, undergraduate, graduate and post-doc and will increase participation by under-represented groups in science. Towards these goals, the investigators have established relationships with girls\u0027 schools and Native American programs. Additional outreach will be carried out in coordination with PolarTREC, PolarPalooza, and if possible, an Antarctic Artist and Writer.\n", "east": 161.667, "geometry": ["POINT(161.667 -77.117)"], "keywords": "Antarctica; Biota; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Microbiology", "locations": "Antarctica", "north": -77.117, "nsf_funding_programs": null, "persons": "Foreman, Christine", "project_titles": "Collaborative Research: The Biogeochemical Evolution of Dissolved Organic Matter in a Fluvial System on the Cotton Glacier, Antarctica", "projects": [{"proj_uid": "p0000458", "repository": "USAP-DC", "title": "Collaborative Research: The Biogeochemical Evolution of Dissolved Organic Matter in a Fluvial System on the Cotton Glacier, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.117, "title": "The Biogeochemical Evolution of Dissolved Organic Matter in a Fluvial System on the Cotton Glacier, Antarctica", "uid": "600104", "west": 161.667}, {"awards": "0944489 Williams, Trevor", "bounds_geometry": ["POLYGON((-55 -58,-33.2 -58,-11.4 -58,10.4 -58,32.2 -58,54 -58,75.8 -58,97.6 -58,119.4 -58,141.2 -58,163 -58,163 -60,163 -62,163 -64,163 -66,163 -68,163 -70,163 -72,163 -74,163 -76,163 -78,141.2 -78,119.4 -78,97.6 -78,75.8 -78,54 -78,32.2 -78,10.4 -78,-11.4 -78,-33.2 -78,-55 -78,-55 -76,-55 -74,-55 -72,-55 -70,-55 -68,-55 -66,-55 -64,-55 -62,-55 -60,-55 -58))"], "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "Intellectual Merit: The PIs propose to study the stability and dynamics of the East Antarctic ice sheet during the Pliocene in the area of the Wilkes and Aurora subglacial basins. Models indicate the ice sheet is most sensitive to warming in these low-lying areas. This study is important as there is very little direct evidence about which parts of the East Antarctic ice sheet became unstable under warm conditions. In a pilot study the PIs have shown that the isotopic geochemical signature of downcore ice-rafted debris (IRD) can be linked to continental source areas indicating which parts of the ice sheet reached the coast and calved IRD-bearing icebergs. Their initial results suggest rapid iceberg discharge from the Wilkes Land and Adelie Land coastal areas at times in the late Miocene and early Pliocene. In this study the PIs will analyze IRD from IODP sediment cores collected on the continental rise off East Antarctica. By analyzing 40Ar/39Ar ages of hornblende IRD grains, U-Pb ages of zircons, and Sm-Nd isotopes of the fine fraction of several IRD-rich layers for each core, they will be able to fingerprint continental source areas that indicate ice extent and dynamics on East Antarctica. The PIs will also carry out detailed studies across a few of these layers to characterize the anatomy of the ice-rafting event and better understand the mechanism of ice destabilization. Broader impacts: The data collected will be important for scientists in a broad variety of fields. The project will involve one undergraduate student and one summer intern at LDEO, and a graduate student at Imperial College London. The project will expose to cutting edge methodologies as well as an international research team. Data from the project will be deposited in the online databases (SedDB) and all results and methods will be made available to the scientific community through publications in peer-reviewed journals and attendance at international conferences\n", "east": 163.0, "geometry": ["POINT(54 -68)"], "keywords": "Geochronology; George V Land; IODP U1356; IODP U1361; Marine Sediments; ODP1165; Prydz Bay; Solid Earth; Southern Ocean; Wilkes Land", "locations": "Southern Ocean; Wilkes Land; Prydz Bay; George V Land", "north": -58.0, "nsf_funding_programs": null, "persons": "Williams, Trevor; Hemming, Sidney R.", "project_titles": "History of the East Antarctic Ice Sheet since the mid-Miocene: New Evidence from Provenance of Ice-rafted Debris", "projects": [{"proj_uid": "p0000353", "repository": "USAP-DC", "title": "History of the East Antarctic Ice Sheet since the mid-Miocene: New Evidence from Provenance of Ice-rafted Debris"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "History of the East Antarctic Ice Sheet since the mid-Miocene: New Evidence from Provenance of Ice-rafted Debris", "uid": "600116", "west": -55.0}, {"awards": "0944686 Kieber, David", "bounds_geometry": ["POLYGON((-160 -68,-159 -68,-158 -68,-157 -68,-156 -68,-155 -68,-154 -68,-153 -68,-152 -68,-151 -68,-150 -68,-150 -69,-150 -70,-150 -71,-150 -72,-150 -73,-150 -74,-150 -75,-150 -76,-150 -77,-150 -78,-151 -78,-152 -78,-153 -78,-154 -78,-155 -78,-156 -78,-157 -78,-158 -78,-159 -78,-160 -78,-160 -77,-160 -76,-160 -75,-160 -74,-160 -73,-160 -72,-160 -71,-160 -70,-160 -69,-160 -68))"], "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "Spectacular blooms of Phaeocystis antarctica in the Ross Sea, Antarctica are the source of some of the world\u0027s highest concentrations of dimethylsulfoniopropionate (DMSP) and its volatile degradation product, dimethylsulfide (DMS). The flux of DMS from the oceans to the atmosphere in this region and its subsequent gas phase oxidation generates aerosols that have a strong influence on cloud properties and possibly climate. In the oceans, DMS and DMSP are quantitatively significant components of the carbon, sulfur, and energy flows in marine food webs, especially in the Ross Sea. Despite its central role in carbon and sulfur biogeochemistry in the Ross Sea, surprisingly little is known about the physiological functions of DMSP in P. antarctica. The research will isolate and characterize DMSP lyases from P. antarctica, with the goal of obtaining amino acid and gene sequence information on these important enzymes. The physiological studies will focus on the effects of varying intensities of photosynthetically active radiation, with and without ultraviolet radiation as these are factors that we have found to be important controls on DMSP and DMS dynamics. The research also will examine the effects of prolonged darkness on the dynamics of DMSP and related compounds in P. antarctica, as survival of this species during the dark Antarctic winter and at sub-euphotic depths appears to be an important part of the Phaeocystis\u0027 ecology. A unique aspect of this work is the focus on measurements of intracellular MSA, which if detected, would provide strong evidence for in vivo radical scavenging functions for methyl sulfur compounds. The study will advance understanding of what controls DMSP cycling and ultimately DMS emissions from the Ross Sea and also provide information on what makes P. antarctica so successful in this extreme environment. The research will directly benefit and build on several interrelated ocean-atmosphere programs including the International Surface Ocean Lower Atmosphere Study (SOLAS) program. The PIs will participate in several activities involving K-12 education, High School teacher training, public education and podcasting through the auspices of the Dauphin Island Sea Lab Discovery Hall program and SUNY ESF. Two graduate students will be employed full time, and six undergraduates (2 each summer) will be trained as part of this project.\n", "east": -150.0, "geometry": ["POINT(-155 -73)"], "keywords": "Biota; Ross Sea; Southern Ocean", "locations": "Ross Sea; Southern Ocean", "north": -68.0, "nsf_funding_programs": null, "persons": "Kieber, David John", "project_titles": "Collaborative Research: Ecophysiology of DMSP and related compounds and their contributions to carbon and sulfur dynamics in Phaeocystis antarctica", "projects": [{"proj_uid": "p0000085", "repository": "USAP-DC", "title": "Collaborative Research: Ecophysiology of DMSP and related compounds and their contributions to carbon and sulfur dynamics in Phaeocystis antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Ecophysiology of DMSP and related compounds and their contributions to carbon and sulfur dynamics in Phaeocystis antarctica", "uid": "600117", "west": -160.0}, {"awards": "XXXXXXX Palais, Julie", "bounds_geometry": ["POLYGON((-73.45 -53.1,-58.745 -53.1,-44.04 -53.1,-29.335 -53.1,-14.63 -53.1,0.075 -53.1,14.78 -53.1,29.485 -53.1,44.19 -53.1,58.895 -53.1,73.6 -53.1,73.6 -53.12,73.6 -53.14,73.6 -53.16,73.6 -53.18,73.6 -53.2,73.6 -53.22,73.6 -53.24,73.6 -53.26,73.6 -53.28,73.6 -53.3,58.895 -53.3,44.19 -53.3,29.485 -53.3,14.78 -53.3,0.075 -53.3,-14.63 -53.3,-29.335 -53.3,-44.04 -53.3,-58.745 -53.3,-73.45 -53.3,-73.45 -53.28,-73.45 -53.26,-73.45 -53.24,-73.45 -53.22,-73.45 -53.2,-73.45 -53.18,-73.45 -53.16,-73.45 -53.14,-73.45 -53.12,-73.45 -53.1))"], "date_created": "Thu, 19 Dec 2013 00:00:00 GMT", "description": "This data set contains data on the physical flow characteristics, mass balance, sub-glacial topography, and recent fluctuations of the Heard Island glacier. The data were collected for The Antarctic Science Advisory Committee (ASAC) project 2363, a continuation of ASAC project 1158. A full report of the data collected and the work completed are available for download with the data.\n\nThe data were collected by the Heard Island glaciology team during the 2003-04 Australian Antarctic Division expedition, as well as some data from the previous expedition in November 2000.", "east": 73.6, "geometry": ["POINT(73.525 -53.2)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Heard Island Glacier", "locations": "Heard Island Glacier; Antarctica", "north": -53.1, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Truffer, Martin", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -53.3, "title": "Heard Island Glacier Fluctuations and Climatic Change - 2003/04 Fieldwork", "uid": "609582", "west": 73.45}, {"awards": "0337933 Cole-Dai, Jihong", "bounds_geometry": ["POINT(0 -90)"], "date_created": "Tue, 19 Nov 2013 00:00:00 GMT", "description": "A 180 m ice core drilled at South Pole in 2004/2005 was analyzed for concentrations of major ions at a depth resolution of approximately 2 cm. Measured ions are chloride, nitrate, sulfate, sodium, potassium, magnesium and calcium. The bottom of the core has been dated to 1830 years before 2004.", "east": 0.0, "geometry": ["POINT(0 -90)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Ion Chromatograph; South Pole", "locations": "Antarctica; South Pole", "north": -90.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Cole-Dai, Jihong", "project_titles": "Collaborative Research: Investigating Atmospheric Chemistry and Dynamics through Oxygen and Sulfur Isotopes in Volcanic Sulfate from South Pole Ice Cores", "projects": [{"proj_uid": "p0000031", "repository": "USAP-DC", "title": "Collaborative Research: Investigating Atmospheric Chemistry and Dynamics through Oxygen and Sulfur Isotopes in Volcanic Sulfate from South Pole Ice Cores"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Major Ion Concentrations in 2004 South Pole Ice Core", "uid": "609542", "west": 0.0}, {"awards": "0838843 Kurbatov, Andrei", "bounds_geometry": ["POLYGON((159 -75.67,159.025 -75.67,159.05 -75.67,159.075 -75.67,159.1 -75.67,159.125 -75.67,159.15 -75.67,159.175 -75.67,159.2 -75.67,159.225 -75.67,159.25 -75.67,159.25 -75.786,159.25 -75.902,159.25 -76.018,159.25 -76.134,159.25 -76.25,159.25 -76.366,159.25 -76.482,159.25 -76.598,159.25 -76.714,159.25 -76.83,159.225 -76.83,159.2 -76.83,159.175 -76.83,159.15 -76.83,159.125 -76.83,159.1 -76.83,159.075 -76.83,159.05 -76.83,159.025 -76.83,159 -76.83,159 -76.714,159 -76.598,159 -76.482,159 -76.366,159 -76.25,159 -76.134,159 -76.018,159 -75.902,159 -75.786,159 -75.67))"], "date_created": "Thu, 24 Oct 2013 00:00:00 GMT", "description": "This data set includes stable water isotope values at 10 m resolution along an approximately 5 km transect through the main icefield of the Allan Hills Blue Ice Area, and at 15 cm within a 225 m core drilled at the midpoint of the transect.", "east": 159.25, "geometry": ["POINT(159.125 -76.25)"], "keywords": "Allan Hills; Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Isotope", "locations": "Antarctica; Allan Hills", "north": -75.67, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Kurbatov, Andrei V.; Spaulding, Nicole; Mayewski, Paul A.; Introne, Douglas", "project_titles": "Collaborative Research: Exploring A 2 Million + Year Ice Climate Archive-Allan Hills Blue Ice Area (2MBIA); Collaborative research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area ", "projects": [{"proj_uid": "p0000046", "repository": "USAP-DC", "title": "Collaborative Research: Exploring A 2 Million + Year Ice Climate Archive-Allan Hills Blue Ice Area (2MBIA)"}, {"proj_uid": "p0010253", "repository": "USAP-DC", "title": "Collaborative research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area "}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.83, "title": "Allan Hills Stable Water Isotopes", "uid": "609541", "west": 159.0}, {"awards": "0944764 Brook, Edward J.", "bounds_geometry": ["POINT(-148.82 -81.66)", "POINT(-119.83 -80.01)"], "date_created": "Thu, 08 Aug 2013 00:00:00 GMT", "description": "During the last glacial period atmospheric carbon dioxide and temperature in Antarctica varied in a similar fashion on millennial time scales, but previous work indicates that these changes were gradual. In a detailed analysis of one event, we now find that approximately half of the CO2 increase that occurred during the 1500 year cold period between Dansgaard-Oeschger (DO) Events 8 and 9 happened rapidly, over less than two centuries. This rise in CO2 was synchronous with, or slightly later than, a rapid increase of Antarctic temperature inferred from stable isotopes.", "east": -119.83, "geometry": ["POINT(-148.82 -81.66)", "POINT(-119.83 -80.01)"], "keywords": "Antarctica; Arctic; Byrd; Chemistry:fluid; Chemistry:Fluid; CO2; Geochemistry; GISP2; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Methane; Paleoclimate; Siple Dome Ice Core; Taylor Dome; Taylor Dome Ice Core", "locations": "Antarctica; Taylor Dome; Arctic", "north": -80.01, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Brook, Edward J.; Ahn, Jinho", "project_titles": "Atmospheric CO2 and Abrupt Climate Change", "projects": [{"proj_uid": "p0000179", "repository": "USAP-DC", "title": "Atmospheric CO2 and Abrupt Climate Change"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core; Taylor Dome Ice Core; Byrd Ice Core", "south": -81.66, "title": "Abrupt Change in Atmospheric CO2 During the Last Ice Age", "uid": "609539", "west": -148.82}, {"awards": "9725057 Mayewski, Paul; 0837883 Mayewski, Paul", "bounds_geometry": ["POLYGON((-76.1 -77.68,-53.253 -77.68,-30.406 -77.68,-7.559 -77.68,15.288 -77.68,38.135 -77.68,60.982 -77.68,83.829 -77.68,106.676 -77.68,129.523 -77.68,152.37 -77.68,152.37 -78.912,152.37 -80.144,152.37 -81.376,152.37 -82.608,152.37 -83.84,152.37 -85.072,152.37 -86.304,152.37 -87.536,152.37 -88.768,152.37 -90,129.523 -90,106.676 -90,83.829 -90,60.982 -90,38.135 -90,15.288 -90,-7.559 -90,-30.406 -90,-53.253 -90,-76.1 -90,-76.1 -88.768,-76.1 -87.536,-76.1 -86.304,-76.1 -85.072,-76.1 -83.84,-76.1 -82.608,-76.1 -81.376,-76.1 -80.144,-76.1 -78.912,-76.1 -77.68))"], "date_created": "Thu, 11 Jul 2013 00:00:00 GMT", "description": "This data set contains sub-annually resolved ice core chemistry data from various sites on the Antarctic Ice Sheet during the US International Trans-Antarctic Scientific Expedition (US ITASE) deployments. Researchers conducted experiments approximately every 30 - 300 km looking for clues representing climatic conditions over the past 200-1000+ years. Ice cores obtained for the glaciochemical component of the US ITASE research were analyzed for soluble major ion content and in some cases trace elements. Extreme events, such as volcanic eruptions, provide absolute age horizons within each core that are easily identified in chemical profiles. Our chemical analysis is also useful for quantifying anthropogenic impact, biogeochemical cycling, and for reconstructing past atmospheric circulation patterns.", "east": 152.37, "geometry": ["POINT(38.135 -83.84)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; ITASE; Paleoclimate; Solid Earth; WAIS", "locations": "Antarctica; WAIS", "north": -77.68, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Dixon, Daniel A.; Mayewski, Paul A.", "project_titles": "Science Management for the United States Component of the International Trans-Antarctic Expedition", "projects": [{"proj_uid": "p0000221", "repository": "USAP-DC", "title": "Science Management for the United States Component of the International Trans-Antarctic Expedition"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "ITASE", "south": -90.0, "title": "US International Trans-Antarctic Scientific Expedition (US ITASE) Glaciochemical Data", "uid": "609273", "west": -76.1}, {"awards": "8519083 Kamb, Barcley; 9615420 Kamb, Barclay", "bounds_geometry": ["POLYGON((-148.808333 -81.07364,-147.5100275 -81.07364,-146.211722 -81.07364,-144.9134165 -81.07364,-143.615111 -81.07364,-142.3168055 -81.07364,-141.0185 -81.07364,-139.7201945 -81.07364,-138.421889 -81.07364,-137.1235835 -81.07364,-135.825278 -81.07364,-135.825278 -81.3341927,-135.825278 -81.5947454,-135.825278 -81.8552981,-135.825278 -82.1158508,-135.825278 -82.3764035,-135.825278 -82.6369562,-135.825278 -82.8975089,-135.825278 -83.1580616,-135.825278 -83.4186143,-135.825278 -83.679167,-137.1235835 -83.679167,-138.421889 -83.679167,-139.7201945 -83.679167,-141.0185 -83.679167,-142.3168055 -83.679167,-143.615111 -83.679167,-144.9134165 -83.679167,-146.211722 -83.679167,-147.5100275 -83.679167,-148.808333 -83.679167,-148.808333 -83.4186143,-148.808333 -83.1580616,-148.808333 -82.8975089,-148.808333 -82.6369562,-148.808333 -82.3764035,-148.808333 -82.1158508,-148.808333 -81.8552981,-148.808333 -81.5947454,-148.808333 -81.3341927,-148.808333 -81.07364))"], "date_created": "Thu, 13 Jun 2013 00:00:00 GMT", "description": "This data set contains temperature-depth profile measurements taken in 22 boreholes drilled on the West Antarctic Ice Sheet, which exhibit two distinctly different thermal states of basal ice: a warm state and a relatively colder state. The data are available in ASCII Text Format (.txt) and Portable Document Format (PDF) via FTP.", "east": -135.825278, "geometry": ["POINT(-142.3168055 -82.3764035)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Temperature", "locations": "Antarctica", "north": -81.07364, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Engelhardt, Hermann", "project_titles": "Basal Conditions of Ice Stream D and Related Borehole Studies of Antarctic Ice Stream Mechanics", "projects": [{"proj_uid": "p0000181", "repository": "USAP-DC", "title": "Basal Conditions of Ice Stream D and Related Borehole Studies of Antarctic Ice Stream Mechanics"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -83.679167, "title": "Temperature of the West Antarctic Ice Sheet", "uid": "609537", "west": -148.808333}, {"awards": null, "bounds_geometry": ["POLYGON((160.666667 -77.833333,160.681667 -77.833333,160.696667 -77.833333,160.711667 -77.833333,160.726667 -77.833333,160.741667 -77.833333,160.756667 -77.833333,160.771667 -77.833333,160.786667 -77.833333,160.801667 -77.833333,160.816667 -77.833333,160.816667 -77.8399997,160.816667 -77.8466664,160.816667 -77.8533331,160.816667 -77.8599998,160.816667 -77.8666665,160.816667 -77.8733332,160.816667 -77.8799999,160.816667 -77.8866666,160.816667 -77.8933333,160.816667 -77.9,160.801667 -77.9,160.786667 -77.9,160.771667 -77.9,160.756667 -77.9,160.741667 -77.9,160.726667 -77.9,160.711667 -77.9,160.696667 -77.9,160.681667 -77.9,160.666667 -77.9,160.666667 -77.8933333,160.666667 -77.8866666,160.666667 -77.8799999,160.666667 -77.8733332,160.666667 -77.8666665,160.666667 -77.8599998,160.666667 -77.8533331,160.666667 -77.8466664,160.666667 -77.8399997,160.666667 -77.833333))"], "date_created": "Mon, 18 Mar 2013 00:00:00 GMT", "description": "This data set is comprised of four surveyed valleys focusing on the depth to ground ice in the high-elevation Quartermain Mountains in the Beacon Valley area: University Valley, Farnell Valley, and two unnamed valleys north of University Valley, which we will call Valley North and Valley 2 North. To date it is only in the high-elevation Dry Valleys that the climatic conditions are dry and cold enough that cryotic (always below 0\u0026deg;C) yet dry soil is found over ice-cemented ground (McKay et al. 1998), (Bockheim 2007). The data provide a qualitative and quantitative contribution towards understanding the type and distribution of ground ice in the Quartermain Mountains at a high spatial resolution. The measurements can be used to improve and validate models of ice stability and distribution. This data set contains observations of depth to ice-cemented ground, based on 475 measurements at 147 sites. Note that the measurements represent the thickness of the active layer plus any dry permafrost layer, which is ubiquitous in this region, and not just the thickness of the active layer.", "east": 160.816667, "geometry": ["POINT(160.741667 -77.8666665)"], "keywords": "Antarctica; Critical Zone; Dry Valleys; Geology/Geophysics - Other; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Permafrost; Soil", "locations": "Antarctica; Dry Valleys", "north": -77.833333, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Marinova, Margarita M.; McKay, Christopher P.", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -77.9, "title": "Depths to Ice-cemented Soils in High-elevation Quartermain Mountains, Dry Valleys, Antarctica", "uid": "609529", "west": 160.666667}, {"awards": "0837988 Steig, Eric", "bounds_geometry": ["POLYGON((-180 -65,-144 -65,-108 -65,-72 -65,-36 -65,0 -65,36 -65,72 -65,108 -65,144 -65,180 -65,180 -67.5,180 -70,180 -72.5,180 -75,180 -77.5,180 -80,180 -82.5,180 -85,180 -87.5,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87.5,-180 -85,-180 -82.5,-180 -80,-180 -77.5,-180 -75,-180 -72.5,-180 -70,-180 -67.5,-180 -65))"], "date_created": "Wed, 13 Mar 2013 00:00:00 GMT", "description": "This data set includes ice core water isotope data from Antarctic ice cores covering the last 200 to 2000 years.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Chemistry:fluid; Chemistry:Fluid; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Isotope; Paleoclimate; WAIS Divide", "locations": "Antarctica; WAIS Divide", "north": -65.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Steig, Eric J.", "project_titles": "Collaborative Research: Antarctic Climate Reconstruction Utilizing the US ITASE Ice Core Array (2009- 2012)", "projects": [{"proj_uid": "p0000180", "repository": "USAP-DC", "title": "Collaborative Research: Antarctic Climate Reconstruction Utilizing the US ITASE Ice Core Array (2009- 2012)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "West Antarctica Ice Core and Climate Model Data", "uid": "609536", "west": -180.0}, {"awards": "9615420 Kamb, Barclay", "bounds_geometry": ["POINT(-136.404633 -82.39955)"], "date_created": "Thu, 14 Feb 2013 00:00:00 GMT", "description": "This data set is a collection of video data of basal ice taken in a borehole on the Kamb Ice Stream in West Antarctica. Ice streams are an expression of the inherent instability of the West Antarctic Ice Sheet, and their behavior is a key control on the overall ice-sheet mass balance. Understanding the response of the ice sheet in a warming climate requires a thorough understanding of the internal dynamics of ice streams, in addition to the relevant ice-atmosphere and ice-ocean interactions in the region. The basal environment of the ice streams and of many glaciers is a key scientific interest, including conditions, mainly basal sliding, that lead to fast flow of the ice. The purpose of this data set is to present a review of the full range of original video recordings from the basal ice of the Kamb Ice Stream. Direct observations at the ice-stream bed are a crucial complement to modeling efforts predicting future scenarios in a warming climate.", "east": -136.404633, "geometry": ["POINT(-136.404633 -82.39955)"], "keywords": "Antarctica; Borehole Video; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Kamb Ice Stream; Photo/video; Photo/Video", "locations": "Antarctica; Kamb Ice Stream", "north": -82.39955, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Engelhardt, Hermann", "project_titles": "Basal Conditions of Ice Stream D and Related Borehole Studies of Antarctic Ice Stream Mechanics", "projects": [{"proj_uid": "p0000181", "repository": "USAP-DC", "title": "Basal Conditions of Ice Stream D and Related Borehole Studies of Antarctic Ice Stream Mechanics"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -82.39955, "title": "Videos of Basal Ice in Boreholes on the Kamb Ice Stream in West Antarctica", "uid": "609528", "west": -136.404633}, {"awards": "1039365 Rimmer, Susan", "bounds_geometry": null, "date_created": "Tue, 01 Jan 2013 00:00:00 GMT", "description": "This project studies the Permian-Triassic extinction event as recorded in sedimentary rocks from the Transantarctic Mountains of Antarctica. Two hundred and fifty million years ago most life on Earth was wiped out in a geologic instant. The cause is a subject of great debate. Researchers have identified a unique stratigraphic section near Shackleton glacier laid down during the extinction event. Organic matter from these deposits will be analyzed by density gradient centrifugation (DGC), which will offer detailed information on the carbon isotope composition. The age of these layers will be precisely dated by U/Pb-zircon-dating of intercalated volcanics. Combined, these results will offer detailed constraints on the timing and duration of carbon isotope excursions during the extinction, and offer insight into the coupling of marine and terrestrial carbon cycles. The broader impacts of this project include graduate and undergraduate student research, K12 outreach and teacher involvement, and societal relevance of the results, since the P/T extinction may have been caused by phenomena such as methane release, which could accompany global warming.\n", "east": null, "geometry": null, "keywords": "Antarctica; Chemistry:rock; Chemistry:Rock; Geochemistry; Solid Earth; Transantarctic Mountains", "locations": "Antarctica; Transantarctic Mountains", "north": null, "nsf_funding_programs": null, "persons": "Rimmer, Susan", "project_titles": "Collaborative Research: The Permian -Triassic Transition in Antarctica: Evaluating the Rates and Variability of Carbon Isotope Fluctuatios in Terrestrial Organic Matter", "projects": [{"proj_uid": "p0000507", "repository": "USAP-DC", "title": "Collaborative Research: The Permian -Triassic Transition in Antarctica: Evaluating the Rates and Variability of Carbon Isotope Fluctuatios in Terrestrial Organic Matter"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "The Permian-Triassic Transition in Antarctica: Evaluating the Rates and Variability of Carbon Isotope Fluctuations in Terrestrial Organic Matter", "uid": "600121", "west": null}, {"awards": "0839053 Ackley, Stephen", "bounds_geometry": ["POLYGON((-180 -67.05,-170.9866 -67.05,-161.9732 -67.05,-152.9598 -67.05,-143.9464 -67.05,-134.933 -67.05,-125.9196 -67.05,-116.9062 -67.05,-107.8928 -67.05,-98.8794 -67.05,-89.866 -67.05,-89.866 -68.1033,-89.866 -69.1566,-89.866 -70.2099,-89.866 -71.2632,-89.866 -72.3165,-89.866 -73.3698,-89.866 -74.4231,-89.866 -75.4764,-89.866 -76.5297,-89.866 -77.583,-98.8794 -77.583,-107.8928 -77.583,-116.9062 -77.583,-125.9196 -77.583,-134.933 -77.583,-143.9464 -77.583,-152.9598 -77.583,-161.9732 -77.583,-170.9866 -77.583,180 -77.583,178.57 -77.583,177.14 -77.583,175.71 -77.583,174.28 -77.583,172.85 -77.583,171.42 -77.583,169.99 -77.583,168.56 -77.583,167.13 -77.583,165.7 -77.583,165.7 -76.5297,165.7 -75.4764,165.7 -74.4231,165.7 -73.3698,165.7 -72.3165,165.7 -71.2632,165.7 -70.2099,165.7 -69.1566,165.7 -68.1033,165.7 -67.05,167.13 -67.05,168.56 -67.05,169.99 -67.05,171.42 -67.05,172.85 -67.05,174.28 -67.05,175.71 -67.05,177.14 -67.05,178.57 -67.05,-180 -67.05))"], "date_created": "Tue, 01 Jan 2013 00:00:00 GMT", "description": "Several aspect of the seasonal melting and reformation cycle of Antarctic sea ice appear to be divergent from those occurring in the Arctic. This is most clearly demonstrated by the dramatic diminishing extent and thinning of the Arctic sea ice, to be contrasted to the changes in Antarctic sea-ice extent, which recently (decadaly) shows small increases. Current climate models do not resolve this discrepancy which likely results from both a lack of relevant observational sea-ice data in the Antarctic, along with inadequacies in the physical parameterization of sea-ice properties in climate models. Researchers will take advantage of the cruise track of the I/B Oden during transit through the Antarctic sea-ice zones in the region of the Bellingshausen, Amundsen and Ross (BAR) seas on a cruise to McMurdo Station. Because of its remoteness and inaccessibility, the BAR region is of considerable scientific interest as being one of the last under described and perhaps unexploited marine ecosystems left on the planet. A series of on station and underway observations of sea ice properties will be undertaken, thematically linked to broader questions of summer ice survival and baseline physical properties (e.g. estimates of heat and salt fluxes). In situ spatiotemporal variability of sea-ice cover extent, thickness and snow cover depths will be observed.\n", "east": 165.7, "geometry": ["POINT(-142.083 -72.3165)"], "keywords": "Ice Core Records; Oceans; Oden; OSO1011; Sea Ice; Sea Ice Salinity; Sea Ice Thickness; Southern Ocean", "locations": "Southern Ocean", "north": -67.05, "nsf_funding_programs": null, "persons": "Ackley, Stephen", "project_titles": "The Sea Ice System in Antarctic Summer, Oden Southern Ocean Expedition (OSO 2010-11)", "projects": [{"proj_uid": "p0000676", "repository": "USAP-DC", "title": "The Sea Ice System in Antarctic Summer, Oden Southern Ocean Expedition (OSO 2010-11)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.583, "title": "The Sea Ice System in Antarctic Summer, Oden Southern Ocean Expedition (OSO 2010-11)", "uid": "600106", "west": -89.866}, {"awards": "0838955 Gast, Rebecca", "bounds_geometry": ["POLYGON((71.504166 -76.159164,71.5142214 -76.159164,71.5242768 -76.159164,71.5343322 -76.159164,71.5443876 -76.159164,71.554443 -76.159164,71.5644984 -76.159164,71.5745538 -76.159164,71.5846092 -76.159164,71.5946646 -76.159164,71.60472 -76.159164,71.60472 -76.2018032,71.60472 -76.2444424,71.60472 -76.2870816,71.60472 -76.3297208,71.60472 -76.37236,71.60472 -76.4149992,71.60472 -76.4576384,71.60472 -76.5002776,71.60472 -76.5429168,71.60472 -76.585556,71.5946646 -76.585556,71.5846092 -76.585556,71.5745538 -76.585556,71.5644984 -76.585556,71.554443 -76.585556,71.5443876 -76.585556,71.5343322 -76.585556,71.5242768 -76.585556,71.5142214 -76.585556,71.504166 -76.585556,71.504166 -76.5429168,71.504166 -76.5002776,71.504166 -76.4576384,71.504166 -76.4149992,71.504166 -76.37236,71.504166 -76.3297208,71.504166 -76.2870816,71.504166 -76.2444424,71.504166 -76.2018032,71.504166 -76.159164))"], "date_created": "Tue, 01 Jan 2013 00:00:00 GMT", "description": "This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).\n\nMost organisms meet their carbon and energy needs using photosynthesis (phototrophy) or ingestion/assimilation of organic substances (heterotrophy). However, a nutritional strategy that combines phototrophy and heterotrophy - mixotrophy - is geographically and taxonomically widespread in aquatic systems. While the presence of mixotrophs in the Southern Ocean is known only recently, preliminary evidence indicates a significant role in Southern Ocean food webs. Recent work on Southern Ocean dinoflagellate, Kleptodinium, suggests that it sequesters functional chloroplasts of the bloom-forming haptophyte, Phaeocystis antarctica. This dinoflagellate is abundant in the Ross Sea, has been reported elsewhere in the Southern Ocean, and may have a circumpolar distribution. By combining nutritional modes. mixotrophy may offer competitive advantages over pure autotrophs and heterotrophs.\n\nThe goals of this project are to understand the importance of alternative nutritional strategies for Antarctic species that combine phototrophic and phagotrophic processes in the same organism. The research will combine field investigations of plankton and ice communities in the Southern Ocean with laboratory experiments on Kleptodinium and recently identified mixotrophs from our Antarctic culture collections. The research will address: 1) the relative contributions of phototrophy and phagotrophy in Antarctic mixotrophs; 2) the nature of the relationship between Kleptodinium and its kleptoplastids; 3) the distributions and abundances of mixotrophs and Kleptodinium in the Southern Ocean during austral spring/summer; and 4) the impacts of mixotrophs and Kleptodinium on prey populations, the factors influencing these behaviors and the physiological conditions of these groups in their natural environment. \n\nThe project will contribute to the maintenance of a culture collection of heterotrophic, phototrophic and mixotrophic Antarctic protists that are available to the scientific community, and it will train graduate and undergraduate students at Temple University. Research findings and activities will be summarized for non-scientific audiences through the PIs\u0027 websites and through other public forums, and will involve middle school teachers via collaboration with COSEE-New England.\n", "east": 71.60472, "geometry": ["POINT(71.554443 -76.37236)"], "keywords": "Biota; Microbiology; NBP0305; NBP0405; NBP0508; NBP1101; Oceans; Southern Ocean", "locations": "Southern Ocean", "north": -76.159164, "nsf_funding_programs": null, "persons": "Gast, Rebecca", "project_titles": "Collaborative Research: Alternative Nutritional Strategies in Antarctic Protists", "projects": [{"proj_uid": "p0000490", "repository": "USAP-DC", "title": "Collaborative Research: Alternative Nutritional Strategies in Antarctic Protists"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -76.585556, "title": "Alternative Nutritional Strategies in Antarctic Protists", "uid": "600103", "west": 71.504166}, {"awards": "0838892 Burns, Jennifer", "bounds_geometry": ["POLYGON((162 -75,162.7 -75,163.4 -75,164.1 -75,164.8 -75,165.5 -75,166.2 -75,166.9 -75,167.6 -75,168.3 -75,169 -75,169 -75.3,169 -75.6,169 -75.9,169 -76.2,169 -76.5,169 -76.8,169 -77.1,169 -77.4,169 -77.7,169 -78,168.3 -78,167.6 -78,166.9 -78,166.2 -78,165.5 -78,164.8 -78,164.1 -78,163.4 -78,162.7 -78,162 -78,162 -77.7,162 -77.4,162 -77.1,162 -76.8,162 -76.5,162 -76.2,162 -75.9,162 -75.6,162 -75.3,162 -75))"], "date_created": "Tue, 01 Jan 2013 00:00:00 GMT", "description": "Marine mammals of the Southern Ocean have evolved diverse life history patterns and foraging strategies to accommodate extreme fluctuations in the physical and biological environment. In light of ongoing climate change and the dramatic shifts in the extent and persistence of sea ice in the Ross Sea, it is critical to understand how Weddell seals, Leptonychotes weddellii, a key apex predator, select and utilize foraging habitats. Recent advances in satellite-linked animal-borne conductivity, temperature and depth (CTD) tags make it possible to simultaneously collect data on seal locations, their diving patterns, and the temperature and salinity profiles of the water columns they utilize. In other ecosystems, such data have revealed that marine predators selectively forage in areas where currents and fronts serve to locally concentrate prey resources, and that these conditions are required to sustain populations. Weddell seals will be studied in McMurdo Sound and at Terra Nova Bay, Ross Sea and will provide the first new data on Weddell seal winter diving behavior and habitat use in almost two decades. The relationship between an animal\u0027s diving behavior and physical habitat has enormous potential to enhance monitoring studies and to provide insight into how changes in ice conditions (due either to warming or the impact of large icebergs, such as B15) might impact individual time budgets and foraging success. The second thrust of this project is to use the profiles obtained from CTD seal tags to model the physical oceanography of this region. Current mathematical models of physical oceanographic processes in the Southern Ocean are directed at better understanding the role that it plays in global climate processes, and the linkages between physical and biological oceanographic processes. However, these efforts are limited by the scarcity of oceanographic data at high latitudes in the winter months; CTD tags deployed on animals will collect data at sufficient spatial and temporal resolution to improve data density. The project will contribute to two IPY endorsed initiatives: MEOP (Marine Mammals as Explorers of the Ocean Pole to Pole) and CAML (Census of Antarctic Marine Life). In addition, the highly visual nature of the data and analysis lends itself to public and educational display and outreach, particularly as they relate to global climate change, and we have collaborations with undergraduate and graduate training programs, the Seymour Marine Discovery Center, and the ARMADA program to foster these broader impacts.", "east": 169.0, "geometry": ["POINT(165.5 -76.5)"], "keywords": "Biota; Oceans; Ross Sea; Seals; Southern Ocean", "locations": "Southern Ocean; Ross Sea", "north": -75.0, "nsf_funding_programs": null, "persons": "Burns, Jennifer", "project_titles": "Collaborative Research: Weddell seals as autonomous sensors of the winter oceanography of the Ross Sea", "projects": [{"proj_uid": "p0000661", "repository": "USAP-DC", "title": "Collaborative Research: Weddell seals as autonomous sensors of the winter oceanography of the Ross Sea"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Weddell seals as autonomous sensors of the winter oceanography of the Ross Sea", "uid": "600101", "west": 162.0}, {"awards": "0838850 Gooseff, Michael", "bounds_geometry": ["POLYGON((-163.3 -77.62,-163.202 -77.62,-163.104 -77.62,-163.006 -77.62,-162.908 -77.62,-162.81 -77.62,-162.712 -77.62,-162.614 -77.62,-162.516 -77.62,-162.418 -77.62,-162.32 -77.62,-162.32 -77.631,-162.32 -77.642,-162.32 -77.653,-162.32 -77.664,-162.32 -77.675,-162.32 -77.686,-162.32 -77.697,-162.32 -77.708,-162.32 -77.719,-162.32 -77.73,-162.418 -77.73,-162.516 -77.73,-162.614 -77.73,-162.712 -77.73,-162.81 -77.73,-162.908 -77.73,-163.006 -77.73,-163.104 -77.73,-163.202 -77.73,-163.3 -77.73,-163.3 -77.719,-163.3 -77.708,-163.3 -77.697,-163.3 -77.686,-163.3 -77.675,-163.3 -77.664,-163.3 -77.653,-163.3 -77.642,-163.3 -77.631,-163.3 -77.62))"], "date_created": "Tue, 01 Jan 2013 00:00:00 GMT", "description": "Two models have been proposed to describe controls over microbial biogeography. One model proposes that microbes are ubiquitously distributed across the global environment, and that environmental conditions select for taxa physiologically adapted to local physical conditions. An alternative model predicts that dispersal is the important limitation to the distribution of microorganisms and that spatial heterogeneity of microbial communities is a result of both dispersal and local environmental limitations. According to both models, spatial heterogeneity of microbial communities may be especially pronounced in extreme ecosystems where the environmental selection for organisms with suitable physiology is most strongly manifest. We propose that Antarctic terrestrial environments are ideal places to examine microbial biogeography for 3 reasons: 1) the pristine nature and remoteness of Antarctica minimizes the prevalence of exotic species dispersed through human vectors; 2) the extreme conditions of Antarctic environments provide a strong environmental filter which limits the establishment of non-indigenous taxa; and 3) extreme heterogeneity in the terrestrial environment provides natural gradients of soil conditions (temperature, water and nutrient availability). In the proposed research we will investigate the influence of snow on the composition and spatial distribution of soil microbial communities and linked biogeochemical cycling in the McMurdo Dry Valleys. We will conduct fieldwork at the landscape scale (repeated remote sensing to characterize snow distribution), at the valley and patch scales (quantify snow patch ablation, microbial communities and biogeochemical cycling in subnivian soils). We hypothesize that snow patches play an important role in structuring the spatial distribution of soil microbial communities and their associated ecosystem functioning because of the physical and hydrological influences that snow patches have on the soil environment. The research will contribute to greater public awareness of the importance of polar research to fundamental questions of biology, ecology and hydrology through direct linkages with International Antarctic Institute public outreach activities, including dissemination of web-based learning units on environmental science and microbiology, targeted as resources for secondary and post-secondary educators. Three graduate students, one postdoctoral scholar and multiple undergraduates will participate in the research activities.\n", "east": -162.32, "geometry": ["POINT(-162.81 -77.675)"], "keywords": "Antarctica; Critical Zone; Mps-1 Water Potential Sensor; Physical Properties; Soil Moisture; Soil Temperature", "locations": "Antarctica", "north": -77.62, "nsf_funding_programs": null, "persons": "Gooseff, Michael N.", "project_titles": "Collaborative Research: The Role of Snow Patches on the Spatial Distribution of Soil Microbial Communities and Biogeochemical Cycling in the Antarctic Dry Valleys", "projects": [{"proj_uid": "p0000489", "repository": "USAP-DC", "title": "Collaborative Research: The Role of Snow Patches on the Spatial Distribution of Soil Microbial Communities and Biogeochemical Cycling in the Antarctic Dry Valleys"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.73, "title": "The Role of Snow Patches on the Spatial Distribution of Soil Microbial Communities and Biogeochemical Cycling in the Antarctic Dry Valleys", "uid": "600100", "west": -163.3}, {"awards": "0838830 Cottrell, Matthew", "bounds_geometry": ["POLYGON((-64.079666 -64.77966,-64.0757659 -64.77966,-64.0718658 -64.77966,-64.0679657 -64.77966,-64.0640656 -64.77966,-64.0601655 -64.77966,-64.0562654 -64.77966,-64.0523653 -64.77966,-64.0484652 -64.77966,-64.0445651 -64.77966,-64.040665 -64.77966,-64.040665 -64.783261,-64.040665 -64.786862,-64.040665 -64.790463,-64.040665 -64.794064,-64.040665 -64.797665,-64.040665 -64.801266,-64.040665 -64.804867,-64.040665 -64.808468,-64.040665 -64.812069,-64.040665 -64.81567,-64.0445651 -64.81567,-64.0484652 -64.81567,-64.0523653 -64.81567,-64.0562654 -64.81567,-64.0601655 -64.81567,-64.0640656 -64.81567,-64.0679657 -64.81567,-64.0718658 -64.81567,-64.0757659 -64.81567,-64.079666 -64.81567,-64.079666 -64.812069,-64.079666 -64.808468,-64.079666 -64.804867,-64.079666 -64.801266,-64.079666 -64.797665,-64.079666 -64.794064,-64.079666 -64.790463,-64.079666 -64.786862,-64.079666 -64.783261,-64.079666 -64.77966))"], "date_created": "Tue, 01 Jan 2013 00:00:00 GMT", "description": "Light quality and availability are likely to change in polar ecosystems as ice coverage and thickness decrease. How microbes adjust to these and other changes will have huge impacts on the polar marine ecosystems. Little is known about photoheterotrophic prokaryotes, which are hypothesized to gain a metabolic advantage by harvesting light energy in addition to utilizing dissolved organic matter (DOM). Photoheterotrophy is not included in current models of carbon cycling and energy flow. This research will examine three questions: 1. Are photoheterotrophic microbes present and active in Antarctic waters in winter and summer? 2. Does community structure of photoheterotrophs shift between summer and winter? 3. Which microbial groups assimilate more DOM in light than in the dark? The research will test hypotheses about activity of photoheterotrophs in winter and in summer, shifts in community structure between light and dark seasons and the potentially unique impacts of photoheterotrophs on biogeochemical processes in the Antarctic. The project will directly support a graduate student, will positively impact the NSF REU program at the College of Marine and Earth Studies, and will include students from the nation\u0027s oldest historical minority college. The results will be featured during weekly tours of Lewes facilities (about 1000 visitors per year) and during Coast Day, an annual open-house that attracts about 10,000 visitors.", "east": -64.040665, "geometry": ["POINT(-64.0601655 -64.797665)"], "keywords": "Antarctic Peninsula; Biota; LTER Palmer Station; Microbiology; Oceans; Southern Ocean", "locations": "Antarctic Peninsula; Southern Ocean", "north": -64.77966, "nsf_funding_programs": null, "persons": "Cottrell, Matthew; Kirchman, David", "project_titles": "Photoheterotrophic Microbes in the West Antarctic Peninsula Marine Ecosystem", "projects": [{"proj_uid": "p0000473", "repository": "USAP-DC", "title": "Photoheterotrophic Microbes in the West Antarctic Peninsula Marine Ecosystem"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.81567, "title": "Photoheterotrophic Microbes in the West Antarctic Peninsula Marine Ecosystem", "uid": "600097", "west": -64.079666}, {"awards": "0741301 O\u0027Brien, Kristin", "bounds_geometry": ["POLYGON((-64.45 -63.29,-64.249 -63.29,-64.048 -63.29,-63.847 -63.29,-63.646 -63.29,-63.445 -63.29,-63.244 -63.29,-63.043 -63.29,-62.842 -63.29,-62.641 -63.29,-62.44 -63.29,-62.44 -63.371,-62.44 -63.452,-62.44 -63.533,-62.44 -63.614,-62.44 -63.695,-62.44 -63.776,-62.44 -63.857,-62.44 -63.938,-62.44 -64.019,-62.44 -64.1,-62.641 -64.1,-62.842 -64.1,-63.043 -64.1,-63.244 -64.1,-63.445 -64.1,-63.646 -64.1,-63.847 -64.1,-64.048 -64.1,-64.249 -64.1,-64.45 -64.1,-64.45 -64.019,-64.45 -63.938,-64.45 -63.857,-64.45 -63.776,-64.45 -63.695,-64.45 -63.614,-64.45 -63.533,-64.45 -63.452,-64.45 -63.371,-64.45 -63.29))"], "date_created": "Tue, 01 Jan 2013 00:00:00 GMT", "description": "Antarctic notothenioid fishes have evolved in the Southern Ocean for 10-14 MY under an unusual set of circumstances. Their characteristics include the complete absence of the circulating oxygen-binding protein, hemoglobin (Hb) within the Channichthyid (Icefish) family of notothenioids. Moreover, some species within the 16 members of this family have also lost the ability to express the oxygen-binding and storage protein, myoglobin (Mb) in cardiac muscle. Our previous work has determined that the loss of Hb and/or Mb is correlated with significant increases in densities of mitochondria within oxidative tissues, and extensive remodeling of these vital organelles. To date, nothing is known about how modifications in mitochondrial architecture of icefishes affect organelle function, or more importantly, how they affect organismal-level physiology. Most critical for Antarctic fishes is that mitochondrial characteristics have been linked to how well ectotherms can withstand increases in temperature. \nThis collaborative research project will address the hypothesis that the unusual mitochondrial architecture of Antarctic Channichthyids has led to changes in function that impact their ability to withstand elevations in temperature. Specifically, the research will (1) determine if the unusual mitochondrial architecture of icefishes affects function and contributes to organismal thermal sensitivity, (2) identify differences in organismal thermal tolerance between red- and white- blooded notothenioids, (3) identify molecular mechanisms regulating changes in mitochondrial structure in icefishes. The results may establish channichthyid icefishes as a sentinel taxon for signaling the impact of global warming on the Southern Ocean. Broad impacts of this project will be realized by participation of high school biology teachers in field work through cooperation with the ARMADA project at the University of Rhode Island, as well as graduate education.\n", "east": -62.44, "geometry": ["POINT(-63.445 -63.695)"], "keywords": "Biota; Oceans; Pot; Southern Ocean; Trawl", "locations": "Southern Ocean", "north": -63.29, "nsf_funding_programs": null, "persons": "O\u0027Brien, Kristin", "project_titles": "Collaborative Research: Linkages among Mitochondrial Form, Function and Thermal Tolerance of Antarctic Notothenioid Fishes", "projects": [{"proj_uid": "p0000483", "repository": "USAP-DC", "title": "Collaborative Research: Linkages among Mitochondrial Form, Function and Thermal Tolerance of Antarctic Notothenioid Fishes"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.1, "title": "Linkages among Mitochondrial Form, Function and Thermal Tolerance of Antarctic Notothenioid Fishes", "uid": "600084", "west": -64.45}, {"awards": "0739783 Junge, Karen", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Tue, 01 Jan 2013 00:00:00 GMT", "description": "The mechanisms enabling bacteria to be metabolically active at very low temperatures are of considerable importance to polar microbial ecology, astrobiology, climate and cryopreservation. This research program has two main objectives. The first is to investigate metabolic activities and gene expression of polar marine psychrophilic bacteria when confronted with freezing conditions at temperatures above the eutectic of seawater (\u003c54C) to unveil cold adaptation mechanisms with relevance to wintertime sea-ice ecology. The second objective is to discern if psychrophilic processes of leucine incorporation into proteins, shown to occur to -196C, amount to metabolic activity providing for the survival of cells or are merely biochemical reactions still possible in flash-frozen samples without any effect on survival. We will examine extracellular and intracellular processes of psychrophilic activity above and below the eutectic by (i) determining the temperature range of metabolic activities such as DNA synthesis, carbon utilization, respiration and ATP generation using radioactive tracer technology, including a control at liquid helium temperature (-268.9C), (ii) analyzing gene expression in ice using whole genome and microarray analyses and iii) examining the role of exopolymeric substances (EPS) and ice micro-physics for the observed activity using an in-situ microscopy technique. Results of the proposed research can be expected to aid in the determination of cellular and genetic strategies that allow cells to maintain activity at extremely low temperatures within an icy matrix and/or to resume activity again when more growth-permissive conditions are encountered. The research is an interdisciplinary collaboration involving three different institutions with participants in Oceanography, Genomics, and Geophysical Sciences. The proposed activity will support the beginning professional career of a female researcher and will serve as the basis for several undergraduate student laboratory projects.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Biota; Microbiology; Oceans; Sea Ice; Southern Ocean", "locations": "Southern Ocean; Antarctica", "north": -60.0, "nsf_funding_programs": null, "persons": "Junge, Karen", "project_titles": "Metabolic Activities and Gene Expression of Marine Psychrophiles in Cold Ice", "projects": [{"proj_uid": "p0000673", "repository": "USAP-DC", "title": "Metabolic Activities and Gene Expression of Marine Psychrophiles in Cold Ice"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Metabolic Activities and Gene Expression of Marine Psychrophiles in Cold Ice", "uid": "600083", "west": -180.0}, {"awards": "0739681 Murray, Alison; 0739698 Doran, Peter", "bounds_geometry": ["POINT(161.931 -77.3885)"], "date_created": "Tue, 01 Jan 2013 00:00:00 GMT", "description": "Lake Vida is the largest lake of the McMurdo Dry Valleys, with an approximately 20 m ice cover overlaying a brine of unknown depth with at least 7 times seawater salinity and temperatures below -10 degrees C year-round. Samples of brine collected from ice above the main water body contain 1) the highest nitrous oxide levels of any natural water body on Earth, 2) unusual geochemistry including anomalously high ammonia and iron concentrations, 3) high microbial counts with an unusual proportion (99%) of ultramicrobacteria. The microbial community is unique even compared to other Dry Valley Lakes. The research proposes to enter, for the first time the main brine body below the thick ice of Lake Vida and perform in situ measurements, collect samples of the brine column, and collect sediment cores from the lake bottom for detailed geochemical and microbiological analyses. The results will allow the characterization of present and past life in the lake, assessment of modern and past sedimentary processes, and determination of the lake\u0027s history. The research will be conducted by a multidisciplinary team that will uncover the biogeochemical processes associated with a non-photosynthetic microbial community isolated for a significant period of time. This research will address diversity, adaptive mechanisms and evolutionary processes in the context of the physical evolution of the environment of Lake Vida. Results will be widely disseminated through publications, presentations at national and international meetings, through the Subglacial Antarctic Lake Exploration (SALE) web site and the McMurdo LTER web site. The research will support three graduate students and three undergraduate research assistants. The results will be incorporated into a new undergraduate biogeosciences course at the University of Illinois at Chicago which has an extremely diverse student body, dominated by minorities.", "east": 161.931, "geometry": ["POINT(161.931 -77.3885)"], "keywords": "Antarctica; Biota; Carbon-14; Chemistry:fluid; Chemistry:Fluid; Chemistry:ice; Chemistry:Ice; Dry Valleys; Geochronology; Ice Core Records; Lake Vida; Microbiology", "locations": "Dry Valleys; Lake Vida; Antarctica", "north": -77.3885, "nsf_funding_programs": null, "persons": "Murray, Alison", "project_titles": "Collaborative Research: Geochemistry and Microbiology of the Extreme Aquatic Environment in Lake Vida, East Antarctica", "projects": [{"proj_uid": "p0000485", "repository": "USAP-DC", "title": "Collaborative Research: Geochemistry and Microbiology of the Extreme Aquatic Environment in Lake Vida, East Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.3885, "title": "Geochemistry and Microbiology of the Extreme Aquatic Environment in Lake Vida, East Antarctica", "uid": "600080", "west": 161.931}, {"awards": "0739648 Cary, Stephen", "bounds_geometry": ["POINT(163 -77.5)"], "date_created": "Tue, 01 Jan 2013 00:00:00 GMT", "description": "The glacial streams of the McMurdo Dry Valleys have extensive cyanobacterial mats that are a probable source of fixed C and N to the Valleys. The research will examine the interplay between the microbial mats in the ephemeral glacial streams and the microbiota of the hyporheic soils (wetted soil zone) underlying and adjacent to those mats. It is hypothesized that the mats are important sources of organic carbon and fixed nitrogen for the soil communities of the hyporheic zone, and release dissolved organic carbon (DOC) and nitrogen (DON) that serves the entire Dry Valley ecosystem. Field efforts will entail both observational and experimental components. Direct comparisons will be made between the mats and microbial populations underlying naturally rehydrated and desiccated mat areas, and between mat areas in the melt streams of the Adams and Miers Glaciers in Miers Valley. Both physiological and phylogenetic indices of the soil microbiota will be examined. Observations will include estimates of rates of mat carbon and nitrogen fixation, soil respiration and leucine and thymidine uptake (as measures of protein \u0026 DNA synthesis, respectively) by soil bacteria, bacterial densities and their molecular ecology. Experimental manipulations will include experimental re-wetting of soils and observations of the time course of response of the microbial community. The research will integrate modern molecular genetic approaches (ARISA-DNA fingerprinting and ultra deep 16S rDNA microbial phylogenetic analysis) with geochemistry to study the diversity, ecology, and function of microbial communities that thrive in these extreme environments. The broader impacts of the project include research and educational opportunities for graduate students and a postdoctoral associate. The P.I.s will involve undergraduates as work-study students and in REU programs, and will participate in educational and outreach programs.", "east": 163.0, "geometry": ["POINT(163 -77.5)"], "keywords": "Antarctica; Biota; Cell Counts; Dry Valleys; Microbiology", "locations": "Dry Valleys; Antarctica", "north": -77.5, "nsf_funding_programs": null, "persons": "Cary, S. Craig", "project_titles": "Collaborative Research: Biogeochemistry of Cyanobactrial Mats and Hyporheic Zone Microbes in McMurdo Dry Valley Glacial Meltwater Streams", "projects": [{"proj_uid": "p0000476", "repository": "USAP-DC", "title": "Collaborative Research: Biogeochemistry of Cyanobactrial Mats and Hyporheic Zone Microbes in McMurdo Dry Valley Glacial Meltwater Streams"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.5, "title": "Biogeochemistry of Cyanobactrial Mats and Hyporheic Zone Microbes in McMurdo Dry Valley Glacial Meltwater Streams", "uid": "600079", "west": 163.0}, {"awards": "0944743 Buckley, Bradley", "bounds_geometry": ["POINT(166.66667 -77.83333)"], "date_created": "Tue, 01 Jan 2013 00:00:00 GMT", "description": "The research will investigate a novel mechanism by which cold-adapted fishes of the Southern Ocean sense and respond to elevated temperatures. It is hypothesized that sub-lethal heat stress may induce cell cycle arrest and/or programmed cell death through apoptosis. The study will use genome-enabled technologies to examine the environmental control over gene expression in Antarctic species and will build direct mechanistic links between the expression of a specific signaling pathway gene and heat-induced changes in cells. Prior results support the hypothesis that heat stress results in cell cycle arrest and, in some cases, programmed cell death in Antarctic fishes. If so, this represents a novel, modified version of the well-conserved cellular stress response found in essentially all other species and suggests that warming ocean temperatures may have profound cellular and physiological impacts on these extremely stenothermal species. The P.I. conducts outreach activities with the Oregon Museum of Science and Industry, will be involved in developing a science curriculum for the Native American Youth and Family Center (NAYA) Early College Academy in Portland, and supports the educational and professional development of both undergraduate and graduate students at Portland State University.\n", "east": 166.66667, "geometry": ["POINT(166.66667 -77.83333)"], "keywords": "Biota; Southern Ocean", "locations": "Southern Ocean", "north": -77.83333, "nsf_funding_programs": null, "persons": "Buckley, Bradley", "project_titles": "The Cellular Stress Response in Cold-adapted Organisms: Building Novel Mechanistic Links between Heat Stress, Cell Cycle Arrest and Apoptosis in Antarctic Fishes.", "projects": [{"proj_uid": "p0000493", "repository": "USAP-DC", "title": "The Cellular Stress Response in Cold-adapted Organisms: Building Novel Mechanistic Links between Heat Stress, Cell Cycle Arrest and Apoptosis in Antarctic Fishes."}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.83333, "title": "The Cellular Stress Response in Cold-adapted Organisms: Building Novel Mechanistic Links between Heat Stress, Cell Cycle Arrest and Apoptosis in Antarctic Fishes.", "uid": "600118", "west": 166.66667}, {"awards": "1019838 Wendt, Dean", "bounds_geometry": null, "date_created": "Tue, 01 Jan 2013 00:00:00 GMT", "description": "The Antarctic Peninsula is among the most rapidly warming regions on earth. Increased heat from the Antarctic Circumpolar Current has elevated the temperature of the 300 m of shelf water below the permanent pycnocline by 0.7 degrees C. This trend has displaced the once dominant cold, dry continental Antarctic climate, and is causing multi-level responses in the marine ecosystem. One striking example of the ecosystem response to warming has been the local declines in ice-dependent Ad\u00e9lie penguins. The changes in these apex predators are thought to be driven by alterations in phytoplankton and zooplankton community composition, and the foraging limitations and diet differences between these species. One of the most elusive questions facing researchers interested in the foraging ecology of the Ad\u00e9lie penguin, namely, what are the biophysical properties that characterize the three dimensional foraging space of this top predator? The research will combine the real-time site and diving information from the Ad\u00e9lie penguin satellite tags with the full characterization of the oceanography and the penguins prey field using an autonomous underwater vehicle (AUV). While some of these changes have been documented over large spatial scales of the WAP, it is now thought that the causal mechanisms that favor of one life history strategy over another may actually operate over much smaller scales than previously thought, specifically on the scale of local breeding sites and over-wintering areas. Characterization of prey fields on these local scales has yet to be done and one that the AUV is ideally suited. The results will have a direct tie to the climate induced changes that are occurring in the West Antarctic Peninsula. This study will also highlight a new approach to linking an autonomous platform to bird behavior that could be expanded to include the other two species of penguins and examine the seasonal differences in their foraging behavior and prey selection. From a vehicle perspective, this effort will inform the AUV user community of new sensor suites and/or data processing approaches that are required to better evaluate foraging habitat. The project also will help transition AUV platforms into routine investigative tools for this region, which is chronically under sampled and will remain difficult to access\n", "east": null, "geometry": null, "keywords": "Biota; Oceans; Southern Ocean", "locations": "Southern Ocean", "north": null, "nsf_funding_programs": null, "persons": "Wendt, Dean; Moline, Mark", "project_titles": "Real-Time Characterization of Adelie Penguin Foraging Environment Using an Autonomous Underwater Vehicle", "projects": [{"proj_uid": "p0000662", "repository": "USAP-DC", "title": "Real-Time Characterization of Adelie Penguin Foraging Environment Using an Autonomous Underwater Vehicle"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Real-Time Characterization of Adelie Penguin Foraging Environment Using an Autonomous Underwater Vehicle", "uid": "600120", "west": null}, {"awards": "1043779 Mellish, Jo-Ann", "bounds_geometry": ["POLYGON((165.83333 -77.51528,165.923331 -77.51528,166.013332 -77.51528,166.103333 -77.51528,166.193334 -77.51528,166.283335 -77.51528,166.373336 -77.51528,166.463337 -77.51528,166.553338 -77.51528,166.643339 -77.51528,166.73334 -77.51528,166.73334 -77.55153,166.73334 -77.58778,166.73334 -77.62403,166.73334 -77.66028,166.73334 -77.69653,166.73334 -77.73278,166.73334 -77.76903,166.73334 -77.80528,166.73334 -77.84153,166.73334 -77.87778,166.643339 -77.87778,166.553338 -77.87778,166.463337 -77.87778,166.373336 -77.87778,166.283335 -77.87778,166.193334 -77.87778,166.103333 -77.87778,166.013332 -77.87778,165.923331 -77.87778,165.83333 -77.87778,165.83333 -77.84153,165.83333 -77.80528,165.83333 -77.76903,165.83333 -77.73278,165.83333 -77.69653,165.83333 -77.66028,165.83333 -77.62403,165.83333 -77.58778,165.83333 -77.55153,165.83333 -77.51528))"], "date_created": "Tue, 01 Jan 2013 00:00:00 GMT", "description": "Despite being an essential physiological component of homeotherm life in polar regions, little is known about the energetic requirements for thermoregulation in either air or water for high- latitude seals. In a joint field and modeling study, the principal investigators will quantify these costs for the Weddell seal under both ambient air and water conditions. The field research will include innovative heat flux, digestive and locomotor cost telemetry on 40 free-ranging seals combined with assessments of animal health (morphometrics, hematology and clinical chemistry panels), quantity (ultrasound) and quality (tissue biopsy) of blubber insulation, and determination of surface skin temperature patterns (infrared thermography). Field-collected data will be combined with an established individual based computational energetics model to define cost-added thresholds in body condition for different body masses. This study will fill a major knowledge gap by providing data essential to modeling all aspects of pinniped life history, in particular for ice seals. Such parameterization of energetic cost components will be essential for the accurate modeling of responses by pinnipeds to environmental variance, including direct and indirect effects driven by climate change. The study also will provide extensive opportunities in polar field work, animal telemetry, biochemical analyses and computational modeling for up to three undergraduate students and one post-doctoral researcher. Integrated education and outreach efforts will educate the public (K-12 through adult) on the importance of quantifying energetic costs of thermoregulation for marine mammals and the need to understand responses of species to environmental variance. This effort will include a custom-built, interactive hands-on mobile exhibit, and development of content for an Ocean Today kiosk.\n", "east": 166.73334, "geometry": ["POINT(166.283335 -77.69653)"], "keywords": "Antarctica; Biota; Oceans; Ross Sea; Sea Ice; Seals; Sea Surface; Southern Ocean", "locations": "Southern Ocean; Antarctica; Ross Sea; Sea Surface", "north": -77.51528, "nsf_funding_programs": null, "persons": "Mellish, Jo-Ann", "project_titles": "Collaborative Research: THERMOREGULATION IN FREE-LIVING ANTARCTIC SEALS: THE MISSING LINK IN EFFECTIVE ECOLOGICAL MODELING", "projects": [{"proj_uid": "p0000343", "repository": "USAP-DC", "title": "Collaborative Research: THERMOREGULATION IN FREE-LIVING ANTARCTIC SEALS: THE MISSING LINK IN EFFECTIVE ECOLOGICAL MODELING"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.87778, "title": "Thermoregulation in Free-Living Antarctic Seals: The Missing Link in Effective Ecological Modeling", "uid": "600130", "west": 165.83333}, {"awards": "0724929 Simms, Alexander", "bounds_geometry": null, "date_created": "Tue, 01 Jan 2013 00:00:00 GMT", "description": "This data set includes optically stimulated luminescence (OSL) ages and elevations obtained from raised beach ridges across the Antarctic Peninsula.", "east": null, "geometry": null, "keywords": "Antarctica; Antarctic Peninsula; Sample/collection Description; Sample/Collection Description; Solid Earth", "locations": "Antarctic Peninsula; Antarctica", "north": null, "nsf_funding_programs": null, "persons": "Simms, Alexander", "project_titles": "SGER: Testing the use of OSL dating of beach deposits along the Antarctic Peninsula", "projects": [{"proj_uid": "p0000266", "repository": "USAP-DC", "title": "SGER: Testing the use of OSL dating of beach deposits along the Antarctic Peninsula"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Optically Stimulated Luminescence Ages of Raised Beaches", "uid": "600026", "west": null}, {"awards": "0732655 Mosley-Thompson, Ellen", "bounds_geometry": ["POLYGON((-63 -60,-62.6 -60,-62.2 -60,-61.8 -60,-61.4 -60,-61 -60,-60.6 -60,-60.2 -60,-59.8 -60,-59.4 -60,-59 -60,-59 -60.5,-59 -61,-59 -61.5,-59 -62,-59 -62.5,-59 -63,-59 -63.5,-59 -64,-59 -64.5,-59 -65,-59.4 -65,-59.8 -65,-60.2 -65,-60.6 -65,-61 -65,-61.4 -65,-61.8 -65,-62.2 -65,-62.6 -65,-63 -65,-63 -64.5,-63 -64,-63 -63.5,-63 -63,-63 -62.5,-63 -62,-63 -61.5,-63 -61,-63 -60.5,-63 -60))"], "date_created": "Tue, 01 Jan 2013 00:00:00 GMT", "description": "Like no other region on Earth, the northern Antarctic Peninsula represents a spectacular natural laboratory of climate change and provides the opportunity to study the record of past climate and ecological shifts alongside the present-day changes in one of the most rapidly warming regions on Earth. This award supported the cryospheric and oceanographic components of an integrated multi-disciplinary program to address these rapid and fundamental changes now taking place in Antarctic Peninsula (AP). By making use of a marine research platform (the RV NB Palmer and on-board helicopters) and additional logistical support from the Argentine Antarctic program, the project brought together glaciologists, oceanographers, marine geologists and biologists who have worked collaboratively to address fundamental interdisciplinary questions regarding climate change.", "east": -59.0, "geometry": ["POINT(-61 -62.5)"], "keywords": "Antarctica; Antarctic Peninsula; Bruce Plateau; Glaciology; Ice Core Records; Isotope; LARISSA; Paleoclimate; Sample/collection Description; Sample/Collection Description; Snow Accumulation", "locations": "Antarctica; Bruce Plateau; Antarctic Peninsula", "north": -60.0, "nsf_funding_programs": null, "persons": "Thompson, Lonnie G.; Mosley-Thompson, Ellen", "project_titles": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans", "projects": [{"proj_uid": "p0000101", "repository": "USAP-DC", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "LARISSA", "south": -65.0, "title": "Abrupt Environmental Change in the Larsen Ice Shelf System (LARISSA) - Cryosphere and Oceans", "uid": "600167", "west": -63.0}, {"awards": "0738975 Baker, Ian", "bounds_geometry": ["POINT(-148.82 -81.66)"], "date_created": "Mon, 26 Nov 2012 00:00:00 GMT", "description": "This data set characterizes the microstructure in ice cores, in particular the microstructural locations of impurities, grain orientations, and strain gradients. The fabric of polycrystalline ice is typically described using only the c-axis orientation, but this is insufficient for a full description of grain orientations in this hexagonal material. Thus, both the a-axis and c-axis are used in this data set showing pole figures for five depths of the Siple Dome (SDMA) core between 640 m and 790 m and misorientation angle distribution for the same grains.", "east": -148.82, "geometry": ["POINT(-148.82 -81.66)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Sample/collection Description; Sample/Collection Description; Siple Dome; Siple Dome Ice Core; South Pole; WAISCORES", "locations": "Antarctica; Siple Dome; South Pole", "north": -81.66, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Baker, Ian; Obbard, Rachel; Sieg, Katherine", "project_titles": "Advanced Microstructural Characterization of Polar Ice Cores", "projects": [{"proj_uid": "p0000178", "repository": "USAP-DC", "title": "Advanced Microstructural Characterization of Polar Ice Cores"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core", "south": -81.66, "title": "Siple Dome A (SDMA) Grain Orientation 640 - 790 Meters", "uid": "609526", "west": -148.82}, {"awards": "0538416 McConnell, Joseph", "bounds_geometry": ["POLYGON((-54.9 -73.7,-49.57 -73.7,-44.24 -73.7,-38.91 -73.7,-33.58 -73.7,-28.25 -73.7,-22.92 -73.7,-17.59 -73.7,-12.26 -73.7,-6.93 -73.7,-1.6 -73.7,-1.6 -74.61,-1.6 -75.52,-1.6 -76.43,-1.6 -77.34,-1.6 -78.25,-1.6 -79.16,-1.6 -80.07,-1.6 -80.98,-1.6 -81.89,-1.6 -82.8,-6.93 -82.8,-12.26 -82.8,-17.59 -82.8,-22.92 -82.8,-28.25 -82.8,-33.58 -82.8,-38.91 -82.8,-44.24 -82.8,-49.57 -82.8,-54.9 -82.8,-54.9 -81.89,-54.9 -80.98,-54.9 -80.07,-54.9 -79.16,-54.9 -78.25,-54.9 -77.34,-54.9 -76.43,-54.9 -75.52,-54.9 -74.61,-54.9 -73.7))"], "date_created": "Wed, 08 Aug 2012 00:00:00 GMT", "description": "This data set consists of sodium (Na) and magnesium (Mg) concentrations versus depth in seven ice cores that were obtained by the Norwegian-U.S. Scientific Traverse of East Antarctica during the International Polar Year (IPY) 2007-2009. Additional glaciochemical analyses and a final depth-age scale will be added as these data become available.\n\nData are available via FTP.", "east": -1.6, "geometry": ["POINT(-28.25 -78.25)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; East Antarctica; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records", "locations": "Antarctica; East Antarctica", "north": -73.7, "nsf_funding_programs": "Antarctic Glaciology", "persons": "McConnell, Joseph", "project_titles": "Collaborative Research: Norwegian-United States IPY Scientific Traverse: Climate Variability and Glaciology in East Antarctica", "projects": [{"proj_uid": "p0000095", "repository": "USAP-DC", "title": "Collaborative Research: Norwegian-United States IPY Scientific Traverse: Climate Variability and Glaciology in East Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -82.8, "title": "Ice Core Chemistry from the Norwegian-U.S. Scientific Traverse of East Antarctica, IPY 2007-2009", "uid": "609520", "west": -54.9}, {"awards": "0230288 Anastasio, Cort", "bounds_geometry": ["POINT(-123.3 -75.1)"], "date_created": "Tue, 26 Jun 2012 00:00:00 GMT", "description": "This data set contains light absorption coefficients for soluble chromophores (light-absorbing chemicals) and concentrations of hydrogen peroxide (HOOH) and nitrate (NO3-) in ten snow samples that were collected in 2003 at Dome C, Antarctica.\n\nData are available via FTP.", "east": -123.3, "geometry": ["POINT(-123.3 -75.1)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Dome C Ice Core; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Physical Properties; Snow/ice; Snow/Ice", "locations": "Antarctica", "north": -75.1, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Anastasio, Cort; Robles, Tony", "project_titles": "Laboratory Studies of Photochemistry in Antarctic Snow and Ice", "projects": [{"proj_uid": "p0000175", "repository": "USAP-DC", "title": "Laboratory Studies of Photochemistry in Antarctic Snow and Ice"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Dome C Ice Core", "south": -75.1, "title": "Light Absorption Coefficients for Soluble Species in Snow, Dome C, Antarctica", "uid": "609519", "west": -123.3}, {"awards": "0739654 Catania, Ginny", "bounds_geometry": ["POLYGON((-110 -74,-109 -74,-108 -74,-107 -74,-106 -74,-105 -74,-104 -74,-103 -74,-102 -74,-101 -74,-100 -74,-100 -74.2,-100 -74.4,-100 -74.6,-100 -74.8,-100 -75,-100 -75.2,-100 -75.4,-100 -75.6,-100 -75.8,-100 -76,-101 -76,-102 -76,-103 -76,-104 -76,-105 -76,-106 -76,-107 -76,-108 -76,-109 -76,-110 -76,-110 -75.8,-110 -75.6,-110 -75.4,-110 -75.2,-110 -75,-110 -74.8,-110 -74.6,-110 -74.4,-110 -74.2,-110 -74))"], "date_created": "Wed, 30 May 2012 00:00:00 GMT", "description": "This data set provides a coastline history of the eastern Amundsen Sea Embayment and terminus histories of its outlet glaciers derived from those coastlines. These outlet glaciers include Smith, Haynes, Thwaites, and Pine Island Glaciers. The coastlines were derived from detailed tracing of Landsat imagery between late 1972 and late 2011 (at a scale of 1:50,000). The data set also uses some additional data from other sources. The terminus histories are calculated as the intersections between these coastlines and 1996 flowlines.\n\nData are available via FTP in ESRI shapefile and comma separated value (.csv) formats.", "east": -100.0, "geometry": ["POINT(-105 -75)"], "keywords": "Amundsen Sea; Antarctica; Climate Change; Coastline; GIS Data; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Satellite Data Interpretation", "locations": "Antarctica; Amundsen Sea", "north": -74.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Macgregor, Joseph A.; Catania, Ginny; Markowski, Michael; Andrews, Alan G.", "project_titles": "Collaborative Research: Ice-flow history of the Thwaites Glacier, West Antarctica", "projects": [{"proj_uid": "p0000143", "repository": "USAP-DC", "title": "Collaborative Research: Ice-flow history of the Thwaites Glacier, West Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -76.0, "title": "Coastal and Terminus History of the Eastern Amundsen Sea Embayment, West Antarctica, 1972 - 2011", "uid": "609522", "west": -110.0}, {"awards": "0636724 Blankenship, Donald", "bounds_geometry": ["POLYGON((-120 -75,-117 -75,-114 -75,-111 -75,-108 -75,-105 -75,-102 -75,-99 -75,-96 -75,-93 -75,-90 -75,-90 -75.5,-90 -76,-90 -76.5,-90 -77,-90 -77.5,-90 -78,-90 -78.5,-90 -79,-90 -79.5,-90 -80,-93 -80,-96 -80,-99 -80,-102 -80,-105 -80,-108 -80,-111 -80,-114 -80,-117 -80,-120 -80,-120 -79.5,-120 -79,-120 -78.5,-120 -78,-120 -77.5,-120 -77,-120 -76.5,-120 -76,-120 -75.5,-120 -75))"], "date_created": "Mon, 21 May 2012 00:00:00 GMT", "description": "This data set contains subglacial water flow paths beneath Thwaites Glacier, West Antarctica, interpreted from ice thickness and bed elevation measurements collected between 7 December 2004 and 31 January 2005 by the Airborne Geophysical Survey of the Amundsen Embayment (AGASEA) expedition. Data consist of an ASCII text file with geographical coordinates, hydraulic head, and bed and surface elevations, and a corresponding .pdf map.\n\nData are available via FTP.", "east": -90.0, "geometry": ["POINT(-105 -77.5)"], "keywords": "AGASEA; Airborne Radar; Antarctica; Elevation; Flow Paths; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Thwaites Glacier", "locations": "Antarctica; Thwaites Glacier", "north": -75.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Carter, Sasha P.; Young, Duncan A.; Blankenship, Donald D.", "project_titles": "Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System", "projects": [{"proj_uid": "p0000174", "repository": "USAP-DC", "title": "Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.0, "title": "Subglacial water flow paths under Thwaites Glacier, West Antarctica", "uid": "609518", "west": -120.0}, {"awards": "0636724 Blankenship, Donald", "bounds_geometry": ["POLYGON((-125 -73,-121.5 -73,-118 -73,-114.5 -73,-111 -73,-107.5 -73,-104 -73,-100.5 -73,-97 -73,-93.5 -73,-90 -73,-90 -74,-90 -75,-90 -76,-90 -77,-90 -78,-90 -79,-90 -80,-90 -81,-90 -82,-90 -83,-93.5 -83,-97 -83,-100.5 -83,-104 -83,-107.5 -83,-111 -83,-114.5 -83,-118 -83,-121.5 -83,-125 -83,-125 -82,-125 -81,-125 -80,-125 -79,-125 -78,-125 -77,-125 -76,-125 -75,-125 -74,-125 -73))"], "date_created": "Thu, 03 May 2012 00:00:00 GMT", "description": "This data set contains line-based radar-derived ice thickness and bed elevation data, collected as part of the Airborne Geophysical Survey of the Amundsen Embayment (AGASEA) expedition, which took place over Thwaites Glacier in West Antarctica from 2004 to 2005. The data set includes ice thickness, ice sheet bed elevation, and ice sheet surface elevation, derived from ice-penetrating radar and aircraft GPS positions. The data are spaced on a 15 km by 15 km grid over the entire catchment of the glacier, and sampled at approximately 15 meters along track. Most of the radar data used for this dataset has been processed using a 1-D focusing algorithm, to reduce the along track resolution to tens of meters, to improve boundary conditions for ice sheet models. \n\nData are available via FTP in space-delimited ASCII format.", "east": -90.0, "geometry": ["POINT(-107.5 -78)"], "keywords": "AGASEA; Airborne Radar; Amundsen Sea; Antarctica; Elevation; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Thickness", "locations": "Amundsen Sea; Antarctica", "north": -73.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Blankenship, Donald D.; Young, Duncan A.; Holt, John W.; Kempf, Scott D.", "project_titles": "Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System", "projects": [{"proj_uid": "p0000174", "repository": "USAP-DC", "title": "Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -83.0, "title": "AGASEA Ice Thickness Profile Data from the Amundsen Sea Embayment, Antarctica", "uid": "609517", "west": -125.0}, {"awards": "XXXXXXX Palais, Julie", "bounds_geometry": ["POLYGON((-70 -63,-68.5 -63,-67 -63,-65.5 -63,-64 -63,-62.5 -63,-61 -63,-59.5 -63,-58 -63,-56.5 -63,-55 -63,-55 -63.7,-55 -64.4,-55 -65.1,-55 -65.8,-55 -66.5,-55 -67.2,-55 -67.9,-55 -68.6,-55 -69.3,-55 -70,-56.5 -70,-58 -70,-59.5 -70,-61 -70,-62.5 -70,-64 -70,-65.5 -70,-67 -70,-68.5 -70,-70 -70,-70 -69.3,-70 -68.6,-70 -67.9,-70 -67.2,-70 -66.5,-70 -65.8,-70 -65.1,-70 -64.4,-70 -63.7,-70 -63))"], "date_created": "Mon, 30 Apr 2012 00:00:00 GMT", "description": "This data set provides a 100 meter resolution surface topography Digital Elevation Model (DEM) of the Antarctic Peninsula. The DEM is based on Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Global Digital Elevation Model (GDEM) data.", "east": -55.0, "geometry": ["POINT(-62.5 -66.5)"], "keywords": "Antarctica; Antarctic Peninsula; ASTER; Digital Elevation Model; Elevation; Glaciers/ice Sheet; Glaciers/Ice Sheet; Solid Earth", "locations": "Antarctica; Antarctic Peninsula", "north": -63.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Cook, Allison", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -70.0, "title": "Antarctic Peninsula 100 m Digital Elevation Model Derived from ASTER GDEM", "uid": "609516", "west": -70.0}, {"awards": "0538538 Sowers, Todd", "bounds_geometry": ["POINT(-112.086483 -79.46763)"], "date_created": "Thu, 19 Apr 2012 00:00:00 GMT", "description": "This data set contains a high-resolution history of atmospheric methane (CH4) concentrations in parts per billion (ppb) from approximately 60 to 11,300 years before present (ybp), obtained in 2010 from the West Antarctic Ice Sheet (WAIS) Divide Ice Core WDC06A. Gas age is derived from the WDC06A-5 ice age scale.\n\nData are available via FTP as a Microsoft Excel file (.xlsx).", "east": -112.086483, "geometry": ["POINT(-112.086483 -79.46763)"], "keywords": "Antarctica; Atmosphere; Chemistry:fluid; Chemistry:Fluid; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Methane; Paleoclimate; WAIS Divide; WAIS Divide Ice Core", "locations": "Antarctica; WAIS Divide", "north": -79.46763, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Sowers, Todd A.", "project_titles": "Collaborative Research: Constructing an Ultra-high Resolution Atmospheric Methane Record for the Last 140,000 Years from WAIS Divide Core.", "projects": [{"proj_uid": "p0000025", "repository": "USAP-DC", "title": "Collaborative Research: Constructing an Ultra-high Resolution Atmospheric Methane Record for the Last 140,000 Years from WAIS Divide Core."}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.46763, "title": "Methane Concentrations from the WAIS Divide Ice Core (WDC06A), 60 to 11,300 ybp", "uid": "609509", "west": -112.086483}, {"awards": "0087521 Waddington, Edwin", "bounds_geometry": ["POINT(-148.82 -81.66)"], "date_created": "Sun, 15 Apr 2012 00:00:00 GMT", "description": "Researchers gathered data on annual snow layers at Siple Dome, Antarctica, using borehole optical stratigraphy. This data set contains annual layer depths and firn optical brightness. The brightness log is a record of reflectivity of the firn, and peaks in brightness are interpreted to be fine-grained high-density winter snow, as part of the wind slab depth-hoar couplet. \n\nData are available via FTP in ASCII text (.txt) format", "east": -148.82, "geometry": ["POINT(-148.82 -81.66)"], "keywords": "Antarctica; Borehole Optical Stratigraphy; Geology/Geophysics - Other; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Siple Dome; Siple Dome Ice Core; Snow/ice; Snow/Ice", "locations": "Antarctica; Siple Dome", "north": -81.66, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Hawley, Robert L.; Waddington, Edwin D.; Alley, Richard; Taylor, Kendrick C.", "project_titles": "Borehole Fingerprinting: Vertical Strain, Firn Compaction, and Firn Depth-Age Scales", "projects": [{"proj_uid": "p0000173", "repository": "USAP-DC", "title": "Borehole Fingerprinting: Vertical Strain, Firn Compaction, and Firn Depth-Age Scales"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core", "south": -81.66, "title": "Annual Layers at Siple Dome, Antarctica, from Borehole Optical Stratigraphy", "uid": "609515", "west": -148.82}, {"awards": "0838722 Reiners, Peter", "bounds_geometry": ["POLYGON((61.9 -67.28,63.218 -67.28,64.536 -67.28,65.854 -67.28,67.172 -67.28,68.49 -67.28,69.808 -67.28,71.126 -67.28,72.444 -67.28,73.762 -67.28,75.08 -67.28,75.08 -67.922,75.08 -68.564,75.08 -69.206,75.08 -69.848,75.08 -70.49,75.08 -71.132,75.08 -71.774,75.08 -72.416,75.08 -73.058,75.08 -73.7,73.762 -73.7,72.444 -73.7,71.126 -73.7,69.808 -73.7,68.49 -73.7,67.172 -73.7,65.854 -73.7,64.536 -73.7,63.218 -73.7,61.9 -73.7,61.9 -73.058,61.9 -72.416,61.9 -71.774,61.9 -71.132,61.9 -70.49,61.9 -69.848,61.9 -69.206,61.9 -68.564,61.9 -67.922,61.9 -67.28))"], "date_created": "Sun, 01 Jan 2012 00:00:00 GMT", "description": "Much of the inventory of East Antarctic bedrock geochronology, as well as a record of its erosional history, is preserved in Cenozoic sediments around its margin. This project is to use these sediments to understand their sub-ice provenance and the erosional history of the shield by measuring ages of multiple geo- and thermochronometers on single detrital crystals and on multiple crystals in detrital clasts (U/Pb, fission-track, and (U-Th)/He dating of zircon and apatite, and 40Ar/39Ar dating of hornblende, mica, and feldspar). The combination of multi-chronometer ages in single grains and clasts provides a powerful fingerprint of bedrock sources, allowing us to trace provenance in Eocene fluvial sandstones through Quaternary diamicts around the margin. Multiple thermochronometric (cooling) ages in the same grains and clasts also allows us to interpret the timing and rates of erosion from these bedrock sources. Delineating a distribution of bedrock age units, their sediment transport connections, and their erosional histories over the Cenozoic, will in turn allow us to test tectonic models bearing on: (1) the origin of the Gamburtsev Subglacial Mountains, (2) fluvial and topographic evolution, and (3) the history of glacial growth and erosion.\n", "east": 75.08, "geometry": ["POINT(68.49 -70.49)"], "keywords": "Antarctica; Fission Track Thermochronology; Gamburtsev Mountains; Geochronology; Marine Sediments; NBP0101; ODP1166; ODP739; Prydz Bay; Solid Earth; Southern Ocean", "locations": "Antarctica; Southern Ocean; Gamburtsev Mountains; Prydz Bay", "north": -67.28, "nsf_funding_programs": null, "persons": "Gehrels, George; Reiners, Peter; Thomson, Stuart", "project_titles": "Collaborative Research: Erosion History and Sediment Provenance of East Antarctica from Multi-method Detrital Geo- and Thermochronology", "projects": [{"proj_uid": "p0000506", "repository": "USAP-DC", "title": "Collaborative Research: Erosion History and Sediment Provenance of East Antarctica from Multi-method Detrital Geo- and Thermochronology"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -73.7, "title": "Erosion History and Sediment Provenance of East Antarctica from Multi-method Detrital Geo- and Thermochronology", "uid": "600093", "west": 61.9}, {"awards": "1043669 Yuan, Xiaojun", "bounds_geometry": ["POLYGON((70 -64,71 -64,72 -64,73 -64,74 -64,75 -64,76 -64,77 -64,78 -64,79 -64,80 -64,80 -64.6,80 -65.2,80 -65.8,80 -66.4,80 -67,80 -67.6,80 -68.2,80 -68.8,80 -69.4,80 -70,79 -70,78 -70,77 -70,76 -70,75 -70,74 -70,73 -70,72 -70,71 -70,70 -70,70 -69.4,70 -68.8,70 -68.2,70 -67.6,70 -67,70 -66.4,70 -65.8,70 -65.2,70 -64.6,70 -64))"], "date_created": "Sun, 01 Jan 2012 00:00:00 GMT", "description": "Processess governing the formation of Antarctic bottom water (AABW) in the Indian Ocean sector of the Southern Ocean remain poorly described. As with AABW formation in more well studied regions of the Antarctic continent, global climate impacts of the source regions of this dense, cold water that help drive the global ocean thermohaline circulation are uncertain. A combination of (annual) continental shelf and slope moorings, seasonal (summer) hydrographic surveys on board the Chinese icebreaker M/V Xuelong, together with synthesis of historic and satellite data will be used to better constrain shelf processes and the atmosphere-ocean-ice interactions in the Prydz Bay region. Despite the seeming remoteness of the study site, changes in the formation rate of AABW could potentially have impact on northern hemisphere climate via effects on the global heat budget and through sea-level rise in the coming decades. The project additionally seeks to promote international collaboration between Chinese and US researchers. The data collected will be broadly disseminated to the oceanographic community through the National Oceanography Data Center and Chinese Arctic and Antarctic Data Center.", "east": 80.0, "geometry": ["POINT(75 -67)"], "keywords": "Antarctica; CTD Data; Mooring; Oceans; Physical Oceanography; Prydz Bay; Southern Ocean", "locations": "Southern Ocean; Antarctica; Prydz Bay", "north": -64.0, "nsf_funding_programs": null, "persons": "Yuan, Xiaojun", "project_titles": "US/Chinese Collaborative Study: Investigation of Bottom Water Formation in Prydz Bay, Antarctica", "projects": [{"proj_uid": "p0000439", "repository": "USAP-DC", "title": "US/Chinese Collaborative Study: Investigation of Bottom Water Formation in Prydz Bay, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -70.0, "title": "US/Chinese Collaborative Study: Investigation of Bottom Water Formation in Prydz Bay, Antarctica", "uid": "600126", "west": 70.0}, {"awards": "0838914 Wannamaker, Philip", "bounds_geometry": ["POLYGON((141.01732 -82.13,144.910279 -82.13,148.803238 -82.13,152.696197 -82.13,156.589156 -82.13,160.482115 -82.13,164.375074 -82.13,168.268033 -82.13,172.160992 -82.13,176.053951 -82.13,179.94691 -82.13,179.94691 -82.351835,179.94691 -82.57367,179.94691 -82.795505,179.94691 -83.01734,179.94691 -83.239175,179.94691 -83.46101,179.94691 -83.682845,179.94691 -83.90468,179.94691 -84.126515,179.94691 -84.34835,176.053951 -84.34835,172.160992 -84.34835,168.268033 -84.34835,164.375074 -84.34835,160.482115 -84.34835,156.589156 -84.34835,152.696197 -84.34835,148.803238 -84.34835,144.910279 -84.34835,141.01732 -84.34835,141.01732 -84.126515,141.01732 -83.90468,141.01732 -83.682845,141.01732 -83.46101,141.01732 -83.239175,141.01732 -83.01734,141.01732 -82.795505,141.01732 -82.57367,141.01732 -82.351835,141.01732 -82.13))"], "date_created": "Sun, 01 Jan 2012 00:00:00 GMT", "description": "The investigators will examine competing hypotheses for the mechanism of extension and creation of the Transantarctic Mountains, and evolution of the thermal regimes of rifted West Antarctica and stable East Antarctica using magnetotelluric (MT) profiles. Surrounded almost entirely by ocean ridges, Antarctica is a special tectonic situation because of the need to make accommodation space for rifting in the Transantarctic region. In the MT method, temporal variations in the Earth\u0027s natural electromagnetic field are used as source fields to probe the electrical resistivity structure in the depth range of 1 to 200 km, or more. Geophysical methods, such as MT, are appropriate in Antarctica because of the predominance of thick ice cover over most of the Continent and the difficult operating environment. The proposed effort will consist of approximately 50 sites over a distance approaching 500 km with a 10 km average spacing, oriented normal to the Transantarctic Mountains (TAM), in the Beardmore glacier area. High quality MT soundings will be collected over thick ice sheets using a custom electrode preamp design, updated from previous Antarctic projects. Data acquisition will take place over two field seasons. The primary goals are three-fold: to establish the location of the deeper tectonic transition between East and West Antarctica that may be offset from the physiographic transition at the surface, using deep resistivity structure distinguish between modes of extensional upwelling and magmatism that may be vertically non-uniform, depth and magnitude of quasi-layered deep crustal low resistivity, particularly below West Antarctica, will be used to estimate crustal heat flux into the ice sheet base.\n", "east": 179.94691, "geometry": ["POINT(160.482115 -83.239175)"], "keywords": "Antarctica; Magnetotelluric; Potential Field; Solid Earth; Transantarctic Mountains", "locations": "Antarctica; Transantarctic Mountains", "north": -82.13, "nsf_funding_programs": null, "persons": "Wannamaker, Philip", "project_titles": "Rift Mechanisms and Thermal Regime of the Lithosphere across Beardmore Glacier Region, Central Transantarctic Mountains, from Magnetotelluric Measurements", "projects": [{"proj_uid": "p0000247", "repository": "USAP-DC", "title": "Rift Mechanisms and Thermal Regime of the Lithosphere across Beardmore Glacier Region, Central Transantarctic Mountains, from Magnetotelluric Measurements"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -84.34835, "title": "Rift Mechanisms and Thermal Regime of the Lithosphere across Beardmore Glacier Region, Central Transantarctic Mountains, from Magnetotelluric Measurements", "uid": "600102", "west": 141.01732}, {"awards": "0739781 Blythe, Ann", "bounds_geometry": ["POLYGON((155.77667 -79.793335,156.208836 -79.793335,156.641002 -79.793335,157.073168 -79.793335,157.505334 -79.793335,157.9375 -79.793335,158.369666 -79.793335,158.801832 -79.793335,159.233998 -79.793335,159.666164 -79.793335,160.09833 -79.793335,160.09833 -79.8578345,160.09833 -79.922334,160.09833 -79.9868335,160.09833 -80.051333,160.09833 -80.1158325,160.09833 -80.180332,160.09833 -80.2448315,160.09833 -80.309331,160.09833 -80.3738305,160.09833 -80.43833,159.666164 -80.43833,159.233998 -80.43833,158.801832 -80.43833,158.369666 -80.43833,157.9375 -80.43833,157.505334 -80.43833,157.073168 -80.43833,156.641002 -80.43833,156.208836 -80.43833,155.77667 -80.43833,155.77667 -80.3738305,155.77667 -80.309331,155.77667 -80.2448315,155.77667 -80.180332,155.77667 -80.1158325,155.77667 -80.051333,155.77667 -79.9868335,155.77667 -79.922334,155.77667 -79.8578345,155.77667 -79.793335))"], "date_created": "Sun, 01 Jan 2012 00:00:00 GMT", "description": "This project studies formation of the TransAntarctic Mountains (TAM) through numerical modeling based on cooling histories of apatite mineral grains. The TAM are the highest and longest rift-related mountain range in the world. Various models for their uplift have been proposed, the most provocative of which is that they are not uplifted, but instead are the eroded remnant of a plateau. This project evaluates that hypothesis by collecting apatites from around Byrd Glacier for fission track thermochronology. Results will be combined with a kinematic and thermal model to determine the TAM\u0027s structural evolution. The plateau model, if correct, implies that the Byrd Glacier originated not as a glacier-carved valley through the TAM, but as a river system flowing in the opposite direction. Given that the Byrd Glacier is a key drainage for the East Antarctic ice sheet, this result has important implications for ice sheet models and interpretation of both regional geology and sediment records. The main broader impacts are undergraduate research and a new collaboration between a primarily undergraduate and a research institution. Students will be involved in the field program, sample analyses, and numerical modeling.", "east": 160.09833, "geometry": ["POINT(157.9375 -80.1158325)"], "keywords": "Antarctica; Fission Track Thermochronology; Geochemistry; Solid Earth; Transantarctic Mountains", "locations": "Antarctica; Transantarctic Mountains", "north": -79.793335, "nsf_funding_programs": null, "persons": "Blythe, Ann Elizabeth; Huerta, Audrey D.", "project_titles": "Collaborative Research: Thermochronologic and modelling test for a Mesozoic West Antarctic Plateau", "projects": [{"proj_uid": "p0000677", "repository": "USAP-DC", "title": "Collaborative Research: Thermochronologic and modelling test for a Mesozoic West Antarctic Plateau"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.43833, "title": "Thermochronologic and modelling test for a Mesozoic West Antarctic Plateau", "uid": "600082", "west": 155.77667}, {"awards": "0739464 Cassano, John", "bounds_geometry": ["POLYGON((160 -74.5,161.5 -74.5,163 -74.5,164.5 -74.5,166 -74.5,167.5 -74.5,169 -74.5,170.5 -74.5,172 -74.5,173.5 -74.5,175 -74.5,175 -74.9,175 -75.3,175 -75.7,175 -76.1,175 -76.5,175 -76.9,175 -77.3,175 -77.7,175 -78.1,175 -78.5,173.5 -78.5,172 -78.5,170.5 -78.5,169 -78.5,167.5 -78.5,166 -78.5,164.5 -78.5,163 -78.5,161.5 -78.5,160 -78.5,160 -78.1,160 -77.7,160 -77.3,160 -76.9,160 -76.5,160 -76.1,160 -75.7,160 -75.3,160 -74.9,160 -74.5))"], "date_created": "Sun, 01 Jan 2012 00:00:00 GMT", "description": "Antarctic polynyas are the ice free zones often persisting in continental sea ice. Characterization of the lower atmosphere properties, air-sea surface heat fluxes and corresponding ocean depth profiles of Antarctic polynyas, especially during strong wind events, is needed for a more detailed understanding of the role of polynya in the production of latent-heat type sea ice and the formation, through brine rejection, of dense ocean bottom waters. Broader impacts: A key technological innovation, the use of instrumented uninhabited aircraft systems (UAS), will be employed to enable the persistent and safe observation of the interaction of light and strong katabatic wind fields with the Terra Nova Bay (Victoria Land, Antarctica) polynya waters during late winter and early summer time frames. The use of UAS observational platforms on the continent to date has to date been modest, but demonstration of their versatility and effectiveness in surveying and observing mode is a welcome development. The projects use of UAS platforms by University of Colorado and LDEO (Columbia) researchers is both high risk, and potentially transformative for the systematic data measurement tasks that many Antarctic science applications increasingly require.", "east": 175.0, "geometry": ["POINT(167.5 -76.5)"], "keywords": "Antarctica; Atmosphere; Meteorology; Navigation; Oceans; Ross Sea; Sea Ice; Southern Ocean; Terra Nova Bay; UAV", "locations": "Ross Sea; Terra Nova Bay; Southern Ocean; Antarctica", "north": -74.5, "nsf_funding_programs": null, "persons": "Cassano, John; Maslanik, Jim", "project_titles": "Collaborative Research: Atmosphere-Ocean-Ice Interaction in a Coastal Polynya", "projects": [{"proj_uid": "p0000678", "repository": "USAP-DC", "title": "Collaborative Research: Atmosphere-Ocean-Ice Interaction in a Coastal Polynya"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.5, "title": "Atmosphere-Ocean-Ice Interaction in a Coastal Polynya", "uid": "600075", "west": 160.0}, {"awards": "0229245 Hamilton, Gordon; 0838843 Kurbatov, Andrei; 9527571 Whillans, Ian", "bounds_geometry": ["POLYGON((158.25 -76.66667,158.325 -76.66667,158.4 -76.66667,158.475 -76.66667,158.55 -76.66667,158.625 -76.66667,158.7 -76.66667,158.775 -76.66667,158.85 -76.66667,158.925 -76.66667,159 -76.66667,159 -76.683336,159 -76.700002,159 -76.716668,159 -76.733334,159 -76.75,159 -76.766666,159 -76.783332,159 -76.799998,159 -76.816664,159 -76.83333,158.925 -76.83333,158.85 -76.83333,158.775 -76.83333,158.7 -76.83333,158.625 -76.83333,158.55 -76.83333,158.475 -76.83333,158.4 -76.83333,158.325 -76.83333,158.25 -76.83333,158.25 -76.816664,158.25 -76.799998,158.25 -76.783332,158.25 -76.766666,158.25 -76.75,158.25 -76.733334,158.25 -76.716668,158.25 -76.700002,158.25 -76.683336,158.25 -76.66667))"], "date_created": "Tue, 20 Dec 2011 00:00:00 GMT", "description": "This data set includes includes high-precision GPS measurements of steel poles within the Allan Hills Main Ice Field, Near Western Ice Field, and extending to the eastern edge of the Middle Western Ice Field, in Antarctica. These data were collected between December 1997 and December 2010. The extended survey period allowed for vertical and horizontal velocities to be calculated with low associated error. Parameters include locations of poles in latitude and longitude, as well as elevation, ice velocity, and accumulation rates.\n\nData are available via FTP as ASCII text files in comma separated value (.csv) format. Raw data are also provided as Trimble raw data, compressed in .zip format, and supplementary information is provided in .csv format and portable document format (.pdf).", "east": 159.0, "geometry": ["POINT(158.625 -76.75)"], "keywords": "Allan Hills; Antarctica; Geology/Geophysics - Other; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPS; Ice Flow Velocity", "locations": "Antarctica; Allan Hills", "north": -76.66667, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Kurbatov, Andrei V.; Spikes, Vandy Blue; Hamilton, Gordon S.; Spaulding, Nicole", "project_titles": "GPS Measurements of Rock and Ice Motions in South Victoria Land", "projects": [{"proj_uid": "p0000523", "repository": "USAP-DC", "title": "GPS Measurements of Rock and Ice Motions in South Victoria Land"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.83333, "title": "GPS Ice Flow Measurements, Allan Hills, Antarctica", "uid": "609507", "west": 158.25}, {"awards": "0739598 Aydin, Murat", "bounds_geometry": ["POINT(112.09 -79.47)", "POINT(-38.3833 72.5833)", "POINT(0 -90)"], "date_created": "Wed, 30 Nov 2011 00:00:00 GMT", "description": "This data set contains ethane, propane, and n-butane measurements in firn air from the South Pole and the West Antarctic Ice Sheet (WAIS) Divide in Antarctica, and from Summit, Greenland. The WAIS Divide and South Pole samples were collected in December to January of of 2005/06 and 2008/09, respectively. The Summit firn was sampled in the summer of 2006. Analyses were conducted on a gas chromatography - mass spectrometry (GC-MS) system at the University of California, Irvine. Measurements and the associated uncertainties are reported as dry air molar mixing ratios in part per trillion (ppt). The reported measurements for each sampling depth represent a mean of multiple measurements on more than one flask in most cases.\n\nData are available via FTP in Microsoft Excel (.xls) format.", "east": 112.09, "geometry": ["POINT(112.09 -79.47)", "POINT(-38.3833 72.5833)", "POINT(0 -90)"], "keywords": "Antarctica; Arctic; Atmosphere; Chemistry:fluid; Chemistry:Fluid; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Greenland; Snow/ice; Snow/Ice; South Pole; WAIS Divide", "locations": "Arctic; WAIS Divide; South Pole; Greenland; Antarctica", "north": 72.5833, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Aydin, Murat; Saltzman, Eric", "project_titles": "Collaborative Research: Methane Isotopes, Hydrocarbons, and other Trace Gases in South Pole Firn Air", "projects": [{"proj_uid": "p0000162", "repository": "USAP-DC", "title": "Collaborative Research: Methane Isotopes, Hydrocarbons, and other Trace Gases in South Pole Firn Air"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Alkanes in Firn Air Samples, Antarctica and Greenland", "uid": "609504", "west": -38.3833}, {"awards": "0636740 Kreutz, Karl", "bounds_geometry": ["POINT(-112.3 -79.433333)"], "date_created": "Tue, 15 Nov 2011 00:00:00 GMT", "description": "This dataset includes major ion, trace element, microparticle and oxygen isotope (\u0026#948;18O) data for a snowpit dug and sampled in December 2008 near the West Antarctic Ice Sheet (WAIS) Divide ice core site. The pit was dug approximately 4 km upwind from the drilling arch in the clean air sector of camp. Sampling was done using trace element clean techniques and all depths are in water equivalents. \n\nData are available via FTP in ASCII text (.txt) format.", "east": -112.3, "geometry": ["POINT(-112.3 -79.433333)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Isotope; Microparticle Concentration; Snow/ice; Snow/Ice; WAIS Divide; WAIS Divide Ice Core", "locations": "Antarctica; WAIS Divide", "north": -79.433333, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Kreutz, Karl; Koffman, Bess", "project_titles": "Collaborative Research: Microparticle/tephra analysis of the WAIS Divide ice core", "projects": [{"proj_uid": "p0000040", "repository": "USAP-DC", "title": "Collaborative Research: Microparticle/tephra analysis of the WAIS Divide ice core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.433333, "title": "WAIS Divide Snowpit Chemical and Isotope Measurements, Antarctica", "uid": "609506", "west": -112.3}, {"awards": "0636740 Kreutz, Karl", "bounds_geometry": ["POINT(112.088333 -79.482778)", "POINT(-112.088333 -79.482778)"], "date_created": "Sat, 01 Oct 2011 00:00:00 GMT", "description": "This data set includes microparticle concentration, electrical conductivity, and density measurements from the West Antarctic Ice Sheet (WAIS) Divide deep ice core, WDC06A. Microparticle concentration data are reported as total particles per ml of meltwater. Concentration was measured using a laser detector and the University of Maine WAIS Melt Monitor system. Conductivity is measured in micro-Siemens per cm (uS/cm). Density data were collected on 3 by 3 by 100 cm sticks from the WDC06A core, using the Maine Automated Density Gauge Experiment (MADGE). Density data span 0 to 160 m in depth, while the particle and conductivity measurements span the upper 577 m of the core. \n\nData are available via FTP in ASCII text format (.txt).", "east": 112.088333, "geometry": ["POINT(112.088333 -79.482778)", "POINT(-112.088333 -79.482778)"], "keywords": "Antarctica; Density; Electrical Conductivity; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Microparticle Concentration; Physical Properties; WAIS Divide; WAIS Divide Ice Core", "locations": "WAIS Divide; Antarctica", "north": -79.482778, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Kreutz, Karl; Hamilton, Gordon S.; Breton, Daniel; Koffman, Bess", "project_titles": "Collaborative Research: Microparticle/tephra analysis of the WAIS Divide ice core", "projects": [{"proj_uid": "p0000040", "repository": "USAP-DC", "title": "Collaborative Research: Microparticle/tephra analysis of the WAIS Divide ice core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.482778, "title": "Microparticle, Conductivity, and Density Measurements from the WAIS Divide Deep Ice Core, Antarctica", "uid": "609499", "west": -112.088333}, {"awards": "0440847 Raymond, Charles", "bounds_geometry": ["POLYGON((-115.457 -78.7489,-114.8241 -78.7489,-114.1912 -78.7489,-113.5583 -78.7489,-112.9254 -78.7489,-112.2925 -78.7489,-111.6596 -78.7489,-111.0267 -78.7489,-110.3938 -78.7489,-109.7609 -78.7489,-109.128 -78.7489,-109.128 -78.83802,-109.128 -78.92714,-109.128 -79.01626,-109.128 -79.10538,-109.128 -79.1945,-109.128 -79.28362,-109.128 -79.37274,-109.128 -79.46186,-109.128 -79.55098,-109.128 -79.6401,-109.7609 -79.6401,-110.3938 -79.6401,-111.0267 -79.6401,-111.6596 -79.6401,-112.2925 -79.6401,-112.9254 -79.6401,-113.5583 -79.6401,-114.1912 -79.6401,-114.8241 -79.6401,-115.457 -79.6401,-115.457 -79.55098,-115.457 -79.46186,-115.457 -79.37274,-115.457 -79.28362,-115.457 -79.1945,-115.457 -79.10538,-115.457 -79.01626,-115.457 -78.92714,-115.457 -78.83802,-115.457 -78.7489))"], "date_created": "Thu, 01 Sep 2011 00:00:00 GMT", "description": "This data set includes ice flow velocities and strain configurations, from GPS measurements on the West Antarctic Ice Sheet (WAIS) Divide. Ninety markers installed in the firn were measured during two consecutive field seasons running from 2005-2006 and 2006-2007. The markers were located in 150 by 60 km area, with smaller clusters of five markers located within about 10 km of each other. Consecutive GPS measurements were used to derive velocity for each marker. Strain configurations were estimated by differentiating a linear fit of the data at each marker cluster. \n\nData are available via FTP as ASCII text (.txt ) files in comma separated value format.", "east": -109.128, "geometry": ["POINT(-112.2925 -79.1945)"], "keywords": "Antarctica; Geology/Geophysics - Other; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPS; Ice Flow Velocity; Ross-Amundsen Divide; Strain", "locations": "Antarctica; Ross-Amundsen Divide", "north": -78.7489, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Matsuoka, Kenichi; Power, Donovan; Rasmussen, Al", "project_titles": "Detection of Crystal Orientation Fabrics near the Ross/Amundsen Sea Ice-flow Divide and at the Siple Dome Ice Core Site using Polarimetric Radar Methods", "projects": [{"proj_uid": "p0000024", "repository": "USAP-DC", "title": "Detection of Crystal Orientation Fabrics near the Ross/Amundsen Sea Ice-flow Divide and at the Siple Dome Ice Core Site using Polarimetric Radar Methods"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.6401, "title": "GPS-Measured Ice Velocities and Strain Data from the Ross and Amundsen Sea Ice Flow Divide, West Antarctica", "uid": "609503", "west": -115.457}, {"awards": "0440847 Raymond, Charles", "bounds_geometry": ["POLYGON((-115.457 -78.7489,-114.8241 -78.7489,-114.1912 -78.7489,-113.5583 -78.7489,-112.9254 -78.7489,-112.2925 -78.7489,-111.6596 -78.7489,-111.0267 -78.7489,-110.3938 -78.7489,-109.7609 -78.7489,-109.128 -78.7489,-109.128 -78.83802,-109.128 -78.92714,-109.128 -79.01626,-109.128 -79.10538,-109.128 -79.1945,-109.128 -79.28362,-109.128 -79.37274,-109.128 -79.46186,-109.128 -79.55098,-109.128 -79.6401,-109.7609 -79.6401,-110.3938 -79.6401,-111.0267 -79.6401,-111.6596 -79.6401,-112.2925 -79.6401,-112.9254 -79.6401,-113.5583 -79.6401,-114.1912 -79.6401,-114.8241 -79.6401,-115.457 -79.6401,-115.457 -79.55098,-115.457 -79.46186,-115.457 -79.37274,-115.457 -79.28362,-115.457 -79.1945,-115.457 -79.10538,-115.457 -79.01626,-115.457 -78.92714,-115.457 -78.83802,-115.457 -78.7489))"], "date_created": "Tue, 30 Aug 2011 00:00:00 GMT", "description": "This dataset contains ground-based, co-polarized radar data collected using pulse-modulated 60 MHz and 179 MHz radar at 19 sites around a deep ice coring site near the Ross and Amundsen flow divide of West Antarctic Ice Sheet (WAIS Divide). At each site, the radar data were collected at 12 orientations of the radar polarization plane for three radar pulse widths: 250 nsec, 500 nsec, and 1000 nsec. Useful signals were received from depths roughly between 200 m and 2000 m. Ice flow velocities and strain configurations were measured at most of these radar survey sites, and these ice motion data are also provided at NSIDC (GPS-Measured Ice Velocities and Strain Data from the Ross and Amundsen Sea Ice Flow Divide, West Antarctica).\n\nData are available via FTP in MATLAB (.mat) format.", "east": -109.128, "geometry": ["POINT(-112.2925 -79.1945)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Radar; Ross-Amundsen Divide", "locations": "Antarctica; Ross-Amundsen Divide", "north": -78.7489, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Matsuoka, Kenichi; Power, Donovan; Fujita, Shuji; Raymond, Charles", "project_titles": "Detection of Crystal Orientation Fabrics near the Ross/Amundsen Sea Ice-flow Divide and at the Siple Dome Ice Core Site using Polarimetric Radar Methods", "projects": [{"proj_uid": "p0000024", "repository": "USAP-DC", "title": "Detection of Crystal Orientation Fabrics near the Ross/Amundsen Sea Ice-flow Divide and at the Siple Dome Ice Core Site using Polarimetric Radar Methods"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.6401, "title": "Polarimetric Radar Data from the Ross and Amundsen Sea Ice Flow Divide, West Antarctica", "uid": "609496", "west": -115.457}, {"awards": "0538674 Winebrenner, Dale", "bounds_geometry": ["POINT(73.17 -78.47)"], "date_created": "Mon, 15 Aug 2011 00:00:00 GMT", "description": "This data set provides a modeled radar attenuation rate profile, showing the predicted contributions from pure ice and impurities to radar attenuation at the Vostok 5G ice core site in Antarctica, as well as the total attenuation rate and its formal uncertainty. The model data are based on borehole temperature logs, concentrations of major soluble ions measured from melted ice core samples, and information about the electrical conductivity of ice. Attenuation rates and their spatial variability are important constraints for radar studies of ice sheets. Parameters include depth, total attenuation rate, and attenuation rate contribution from pure ice, acidity, and salinity.\n\nData are available via FTP as a text file (.txt) with columns in comma separated value format.", "east": 73.17, "geometry": ["POINT(73.17 -78.47)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Lake Vostok; Radar Attenuation Rate; Vostok Ice Core", "locations": "Lake Vostok; Antarctica", "north": -78.47, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Macgregor, Joseph A.; Matsuoka, Kenichi; Studinger, Michael S.", "project_titles": "Collaborative Research: Deciphering the Deep Ice and the Ice-water Interface over Lake Vostok Using Existing Radar Data", "projects": [{"proj_uid": "p0000090", "repository": "USAP-DC", "title": "Collaborative Research: Deciphering the Deep Ice and the Ice-water Interface over Lake Vostok Using Existing Radar Data"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.47, "title": "Modeled Radar Attenuation Rate Profile at the Vostok 5G Ice Core Site, Antarctica", "uid": "609501", "west": 73.17}, {"awards": "0538674 Winebrenner, Dale", "bounds_geometry": ["POLYGON((68.4 -75.7,69.61 -75.7,70.82 -75.7,72.03 -75.7,73.24 -75.7,74.45 -75.7,75.66 -75.7,76.87 -75.7,78.08 -75.7,79.29 -75.7,80.5 -75.7,80.5 -76.04,80.5 -76.38,80.5 -76.72,80.5 -77.06,80.5 -77.4,80.5 -77.74,80.5 -78.08,80.5 -78.42,80.5 -78.76,80.5 -79.1,79.29 -79.1,78.08 -79.1,76.87 -79.1,75.66 -79.1,74.45 -79.1,73.24 -79.1,72.03 -79.1,70.82 -79.1,69.61 -79.1,68.4 -79.1,68.4 -78.76,68.4 -78.42,68.4 -78.08,68.4 -77.74,68.4 -77.4,68.4 -77.06,68.4 -76.72,68.4 -76.38,68.4 -76.04,68.4 -75.7))"], "date_created": "Mon, 01 Aug 2011 00:00:00 GMT", "description": "This data set consists of inferred accumulation rates from three radar layers (26, 35 and 41 thousand years old) in the Vostok Subglacial Lake region. Accumulation rates were inferred using Local-Layer Approximation (LLA), which assumes that the strain-rate history of a particle traveling through the ice sheet can be approximated by the vertical strain-rate profile at the current position of the particle, which the researchers assume to be uniform. Parameters include location, in latitude and longitude, polar stereographic coordinates, and local grid X and Y coordinates, along with layer age, in thousands of years (ka), and inferred accumulation rate (cm/a). The data cover a 150 by 350 km area.\n\nData are available via FTP, as a text file (.txt) with columns in comma separated value format.", "east": 80.5, "geometry": ["POINT(74.45 -77.4)"], "keywords": "Accumulation Rate; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Lake Vostok", "locations": "Antarctica; Lake Vostok", "north": -75.7, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Macgregor, Joseph A.; Matsuoka, Kenichi; Studinger, Michael S.; Waddington, Edwin D.; Winebrenner, Dale", "project_titles": "Collaborative Research: Deciphering the Deep Ice and the Ice-water Interface over Lake Vostok Using Existing Radar Data", "projects": [{"proj_uid": "p0000090", "repository": "USAP-DC", "title": "Collaborative Research: Deciphering the Deep Ice and the Ice-water Interface over Lake Vostok Using Existing Radar Data"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.1, "title": "Millennially Averaged Accumulation Rates for Lake Vostok", "uid": "609500", "west": 68.4}, {"awards": "0440670 Hulbe, Christina; 0125754 Hulbe, Christina", "bounds_geometry": ["POLYGON((-86.557 -74.355,-80.5124 -74.355,-74.4678 -74.355,-68.4232 -74.355,-62.3786 -74.355,-56.334 -74.355,-50.2894 -74.355,-44.2448 -74.355,-38.2002 -74.355,-32.1556 -74.355,-26.111 -74.355,-26.111 -75.3874,-26.111 -76.4198,-26.111 -77.4522,-26.111 -78.4846,-26.111 -79.517,-26.111 -80.5494,-26.111 -81.5818,-26.111 -82.6142,-26.111 -83.6466,-26.111 -84.679,-32.1556 -84.679,-38.2002 -84.679,-44.2448 -84.679,-50.2894 -84.679,-56.334 -84.679,-62.3786 -84.679,-68.4232 -84.679,-74.4678 -84.679,-80.5124 -84.679,-86.557 -84.679,-86.557 -83.6466,-86.557 -82.6142,-86.557 -81.5818,-86.557 -80.5494,-86.557 -79.517,-86.557 -78.4846,-86.557 -77.4522,-86.557 -76.4198,-86.557 -75.3874,-86.557 -74.355))"], "date_created": "Fri, 15 Jul 2011 00:00:00 GMT", "description": "This data set provides a structural feature map of the Ronne Ice Shelf in Antarctica (also known as the Filchner-Ronne Ice Shelf). The map was developed as part of a project to study fracture propagation in the Ronne Ice Shelf, with special focus on the Evans Ice Stream. Features were digitized from the MODIS Mosaic of Antartica (MOA), a composite of individual Moderate Resolution Imaging Spectradiometer (MODIS) images taken between 20 November 2003 and 29 February 2004, with an effective resolution of 125 m. The data set includes estimates of the shelf boundary, including ice stream grounding zones, outlets of glaciers feeding the shelf, extents of islands and ice rises, and the location of the shelf front, and features observed within the shelf, including suture zones between ice streams, streaklines, fractures (crevasses and rifts), and fold-like features. Individual features can be extracted as a group of points and grouping is used to facilitate identification and plotting. \n\nData files are available via FTP in ASCII text (.txt) format. One image file, in Portable Document Format (.pdf), shows the data included in the dataset, plotted using MATLAB. The data set also provides a MATLAB script which can be used to plot the data.", "east": -26.111, "geometry": ["POINT(-56.334 -79.517)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; MOA; MODIS; Ronne Ice Shelf", "locations": "Antarctica; Ronne Ice Shelf", "north": -74.355, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Hulbe, Christina; Ledoux, Christine", "project_titles": "Collaborative Research: Using Fracture Patterns and Ice Thickness to Study the History and Dynamics of Grounding Line Migration and Shutdown of Kamb and Whillans Ice Streams", "projects": [{"proj_uid": "p0000096", "repository": "USAP-DC", "title": "Collaborative Research: Using Fracture Patterns and Ice Thickness to Study the History and Dynamics of Grounding Line Migration and Shutdown of Kamb and Whillans Ice Streams"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -84.679, "title": "MOA-derived Structural Feature Map of the Ronne Ice Shelf", "uid": "609497", "west": -86.557}, {"awards": "0538015 Hulbe, Christina", "bounds_geometry": ["POLYGON((154.71 -82.78,154.79 -82.78,154.87 -82.78,154.95 -82.78,155.03 -82.78,155.11 -82.78,155.19 -82.78,155.27 -82.78,155.35 -82.78,155.43 -82.78,155.51 -82.78,155.51 -82.788,155.51 -82.796,155.51 -82.804,155.51 -82.812,155.51 -82.82,155.51 -82.828,155.51 -82.836,155.51 -82.844,155.51 -82.852,155.51 -82.86,155.43 -82.86,155.35 -82.86,155.27 -82.86,155.19 -82.86,155.11 -82.86,155.03 -82.86,154.95 -82.86,154.87 -82.86,154.79 -82.86,154.71 -82.86,154.71 -82.852,154.71 -82.844,154.71 -82.836,154.71 -82.828,154.71 -82.82,154.71 -82.812,154.71 -82.804,154.71 -82.796,154.71 -82.788,154.71 -82.78))"], "date_created": "Fri, 01 Jul 2011 00:00:00 GMT", "description": "This data set provides the results from a strain grid survey deployed across the Kamb Ice Stream grounding line on the West Antarctic Ice Sheet. The grid was deployed in 2006 and resurveyed in 2007 using a Global Positioning System (GPS). Parameters measured include latitude, longitude, and height of each survey mark in the strain grid, as well as northing, easting, elevations, and displacement of each point during the year between surveys.\n\nData are available via FTP in Microsoft Excel (.xls) format.", "east": 155.51, "geometry": ["POINT(155.11 -82.82)"], "keywords": "Antarctica; Geodesy; Geology/Geophysics - Other; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPS; Grounding Line; Kamb Ice Stream; Strain", "locations": "Antarctica; Kamb Ice Stream", "north": -82.78, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Hulbe, Christina", "project_titles": "Collaborative Research: Grounding Line Forensics: The History of Grounding Line Retreat in the Kamb Ice Stream Outlet Region", "projects": [{"proj_uid": "p0000019", "repository": "USAP-DC", "title": "Collaborative Research: Grounding Line Forensics: The History of Grounding Line Retreat in the Kamb Ice Stream Outlet Region"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -82.86, "title": "Grounding Line Strain Grid Surveys, Kamb Ice Stream, Antarctica", "uid": "609494", "west": 154.71}, {"awards": "0739780 Taylor, Kendrick; 0538578 Brook, Edward J.; 0520523 Brook, Edward J.; 0538538 Sowers, Todd; 0538427 McConnell, Joseph", "bounds_geometry": ["POINT(112.09 -79.47)"], "date_created": "Fri, 27 May 2011 00:00:00 GMT", "description": "This data set provides a high-precision and high-resolution record of atmospheric methane from the West Antarctic Ice Sheet (WAIS) Divide ice core WDC05A, spanning the years 1000 to 1800 C.E. The data include methane (CH4) concentration measurements and ice age chronology. Methane concentration data include mean sample depth, gas age, mean concentration, and concentrations from individual measurements, at a temporal resolution of approximately nine years. Ice chronology data include depth and ice age.\n\nData are available via FTP, in Microsoft Excel (.xlsx) format.", "east": 112.09, "geometry": ["POINT(112.09 -79.47)"], "keywords": "Antarctica; Chemistry:fluid; Chemistry:Fluid; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Paleoclimate; WAIS Divide; WAIS Divide Ice Core", "locations": "WAIS Divide; Antarctica", "north": -79.47, "nsf_funding_programs": "Antarctic Glaciology", "persons": "McConnell, Joseph; Brook, Edward J.; Mitchell, Logan E; Sowers, Todd A.; Taylor, Kendrick C.", "project_titles": "Collaborative Research: Gases in Firn Air and Shallow Ice at the Proposed WAIS Divide Drilling Site", "projects": [{"proj_uid": "p0000368", "repository": "USAP-DC", "title": "Collaborative Research: Gases in Firn Air and Shallow Ice at the Proposed WAIS Divide Drilling Site"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.47, "title": "Methane Concentration and Chronology from the WAIS Divide Ice Core (WDC05A)", "uid": "609493", "west": 112.09}, {"awards": "XXXXXXX Palais, Julie", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -62,180 -64,180 -66,180 -68,180 -70,180 -72,180 -74,180 -76,180 -78,180 -80,144 -80,108 -80,72 -80,36 -80,0 -80,-36 -80,-72 -80,-108 -80,-144 -80,-180 -80,-180 -78,-180 -76,-180 -74,-180 -72,-180 -70,-180 -68,-180 -66,-180 -64,-180 -62,-180 -60))"], "date_created": "Sun, 20 Feb 2011 00:00:00 GMT", "description": "This data set provides grounding line and hydrostatic line locations for the Antarctic coastline and islands around Antarctica. The data are derived using customized software to combine data from Landsat-7 imagery and Ice, Cloud, and land Elevation Satellite (ICESat) laser altimetry, which were primarily collected between 1999 to 2003. The data set also includes elevations along each line, selected from six candidate digital elevation models. The data were developed as part of the Antarctic Surface Accumulation and Ice Discharge (ASAID) project. \r\n\r\nFunding trough NASA grant 509496.02.08.01.81\r\nData are provided in both ASCII text (.txt) and shapefile (.shp, .dbf, .shx) formats.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; ASAID; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Grounding Line Hydrostatic Line; Oceans", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Bindschadler, Robert; Choi, Hyeungu", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -80.0, "title": "High-resolution Image-derived Grounding and Hydrostatic Lines for the Antarctic Ice Sheet", "uid": "609489", "west": -180.0}, {"awards": "0540915 Scambos, Ted", "bounds_geometry": ["POLYGON((-60 -47,-55.5 -47,-51 -47,-46.5 -47,-42 -47,-37.5 -47,-33 -47,-28.5 -47,-24 -47,-19.5 -47,-15 -47,-15 -50.3,-15 -53.6,-15 -56.9,-15 -60.2,-15 -63.5,-15 -66.8,-15 -70.1,-15 -73.4,-15 -76.7,-15 -80,-19.5 -80,-24 -80,-28.5 -80,-33 -80,-37.5 -80,-42 -80,-46.5 -80,-51 -80,-55.5 -80,-60 -80,-60 -76.7,-60 -73.4,-60 -70.1,-60 -66.8,-60 -63.5,-60 -60.2,-60 -56.9,-60 -53.6,-60 -50.3,-60 -47))"], "date_created": "Mon, 31 Jan 2011 00:00:00 GMT", "description": "This data set includes a variety of station data from two Antarctic icebergs. In 2006, researchers installed specialized weather stations called Automated Meteorological Ice Geophysical Observing Stations (AMIGOS) on two icebergs, A22A and UK211 (nicknamed Amigosberg), near Marambio Station in Antarctica.The AMIGOS stations were outfitted with Global Positioning System (GPS) sensors, cameras, and an electronic thermometer. They collected data from their installation in March 2006 until the icebergs crumbled into the ocean, in 2006 (Amigosberg) and 2007 (A22A). Available data include GPS, temperature and ablation measurements, and photographs of the station base and of flag lines extending out to the edges of the icebergs. Snow pit data from iceberg A22A is also included.\n\nThis data set was collected as part of a National Science Foundation Office of Polar Programs Special Grant for Exploratory Research, to explore the possibility of using drfting icebergs to investigate ice shelf evolution caused by climate change. The expedition, nicknamed IceTrek, was conducted jointly with Argentine scientists. The data are available via FTP in ASCII text (.txt) and Joint Photographic Experts Group (.jpg) formats.", "east": -15.0, "geometry": ["POINT(-37.5 -63.5)"], "keywords": "Ablation; Atmosphere; Glaciology; GPS; Meteorology; Oceans; Photo/video; Photo/Video; Sea Ice; Southern Ocean; Temperature", "locations": "Southern Ocean", "north": -47.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Scambos, Ted; Bohlander, Jennifer; Bauer, Rob; Yermolin, Yevgeny; Thom, Jonathan", "project_titles": "Investigating Iceberg Evolution During Drift and Break-Up: A Proxy for Climate-Related Changes in Antarctic Ice Shelves", "projects": [{"proj_uid": "p0000003", "repository": "USAP-DC", "title": "Investigating Iceberg Evolution During Drift and Break-Up: A Proxy for Climate-Related Changes in Antarctic Ice Shelves"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.0, "title": "Climate, Drift, and Image Data from Antarctic Icebergs A22A and UK211, 2006-2007", "uid": "609466", "west": -60.0}, {"awards": "0838729 Hemming, Sidney", "bounds_geometry": ["POLYGON((-67.2 -58,-43.98 -58,-20.76 -58,2.46 -58,25.68 -58,48.9 -58,72.12 -58,95.34 -58,118.56 -58,141.78 -58,165 -58,165 -59.2,165 -60.4,165 -61.6,165 -62.8,165 -64,165 -65.2,165 -66.4,165 -67.6,165 -68.8,165 -70,141.78 -70,118.56 -70,95.34 -70,72.12 -70,48.9 -70,25.68 -70,2.46 -70,-20.76 -70,-43.98 -70,-67.2 -70,-67.2 -68.8,-67.2 -67.6,-67.2 -66.4,-67.2 -65.2,-67.2 -64,-67.2 -62.8,-67.2 -61.6,-67.2 -60.4,-67.2 -59.2,-67.2 -58))"], "date_created": "Sat, 01 Jan 2011 00:00:00 GMT", "description": "Much of the inventory of East Antarctic bedrock geochronology, as well as a record of its erosional history, is preserved in Cenozoic sediments around its margin. This project is to use these sediments to understand their sub-ice provenance and the erosional history of the shield by measuring ages of multiple geo- and thermochronometers on single detrital crystals and on multiple crystals in detrital clasts (U/Pb, fission-track, and (U-Th)/He dating of zircon and apatite, and 40Ar/39Ar dating of hornblende, mica, and feldspar). The combination of multi-chronometer ages in single grains and clasts provides a powerful fingerprint of bedrock sources, allowing us to trace provenance in Eocene fluvial sandstones through Quaternary diamicts around the margin. Multiple thermochronometric (cooling) ages in the same grains and clasts also allows us to interpret the timing and rates of erosion from these bedrock sources. Delineating a distribution of bedrock age units, their sediment transport connections, and their erosional histories over the Cenozoic, will in turn allow us to test tectonic models bearing on: (1) the origin of the Gamburtsev Subglacial Mountains, (2) fluvial and topographic evolution, and (3) the history of glacial growth and erosion.", "east": 165.0, "geometry": ["POINT(48.9 -64)"], "keywords": "Antarctica; Fission Track Thermochronology; Gamburtsev Mountains; Geochronology; Marine Sediments; Solid Earth; Southern Ocean", "locations": "Southern Ocean; Antarctica; Gamburtsev Mountains", "north": -58.0, "nsf_funding_programs": null, "persons": "Hemming, Sidney R.", "project_titles": "Collaborative Research: Erosion History and Sediment Provenance of East Antarctica from Multi-method Detrital Geo- and Thermochronology", "projects": [{"proj_uid": "p0000506", "repository": "USAP-DC", "title": "Collaborative Research: Erosion History and Sediment Provenance of East Antarctica from Multi-method Detrital Geo- and Thermochronology"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -70.0, "title": "Erosion History and Sediment Provenance of East Antarctica from Multi-method Detrital Geo- and Thermochronology", "uid": "600094", "west": -67.2}, {"awards": "0838773 McClintock, James", "bounds_geometry": ["POLYGON((-79 -60,-76.4 -60,-73.8 -60,-71.2 -60,-68.6 -60,-66 -60,-63.4 -60,-60.8 -60,-58.2 -60,-55.6 -60,-53 -60,-53 -61,-53 -62,-53 -63,-53 -64,-53 -65,-53 -66,-53 -67,-53 -68,-53 -69,-53 -70,-55.6 -70,-58.2 -70,-60.8 -70,-63.4 -70,-66 -70,-68.6 -70,-71.2 -70,-73.8 -70,-76.4 -70,-79 -70,-79 -69,-79 -68,-79 -67,-79 -66,-79 -65,-79 -64,-79 -63,-79 -62,-79 -61,-79 -60))"], "date_created": "Sat, 01 Jan 2011 00:00:00 GMT", "description": "The near shore environments of the western Antarctic Peninsula (WAP) harbor extremely high densities of mesograzers (small invertebrate predators approximately 1-25 mm in length) such as benthic amphipods, as well as rich assemblages of macroalgae, endophytes, and macroinvertebrates. Unlike temperate and tropical shallow marine environments, where fish and sea urchins are key grazers structuring the community, mesograzers appear to be much more important in the WAP. Accordingly, the proposed research has two main objectives: (1) To further investigate the interactions between the ecologically dominant large macrophytes, filamentous epi/endophytes, and mesograzers and (2) To determine the nature of interactions between mesograzers and sessile invertebrates. Specifically, the research will examine the following hypotheses: 1: The effects of endophytes on macrophytes are often negative, and consequently macrophytes defend against endophytic infection. 2: Mesoherbivores prevent filamentous algal species, common in the intertidal, from dominating subtidal assemblages. 3: Mesograzer predation pressure on sessile benthic macroinvertebrates, primarily sponges and tunicates, is greatest in shallow habitats dominated by macrophytes, and this impacts depth distributions of macroinvertebrate species. 4: Benthic macroinvertebrates may defend against mesograzers with secondary metabolites which effect molting and/or deter feeding. Broader impacts include involvement of undergraduates, including minorities, in research; training of graduate students, and continuation of the highly successful UAB IN ANTARCTICA interactive web program (two time recipient of awards of excellence from the US Council for Advancement and Support of Education). The researchers also will share their scientific endeavors with teachers, K-12 students, and other members of the community at large while in residence in Antarctica. In addition, the investigators will request the participation of a PolarTREC teacher.", "east": -53.0, "geometry": ["POINT(-66 -65)"], "keywords": "Algae; Antarctica; Antarctic Peninsula; Biota; Oceans; Southern Ocean", "locations": "Antarctica; Southern Ocean; Antarctic Peninsula", "north": -60.0, "nsf_funding_programs": null, "persons": "McClintock, James; Amsler, Charles", "project_titles": "Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula; Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula - continuing", "projects": [{"proj_uid": "p0010016", "repository": "USAP-DC", "title": "Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula - continuing"}, {"proj_uid": "p0000475", "repository": "USAP-DC", "title": "Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -70.0, "title": "The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula", "uid": "600095", "west": -79.0}, {"awards": "0838776 Baker, Bill", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Sat, 01 Jan 2011 00:00:00 GMT", "description": "The near shore environments of the western Antarctic Peninsula (WAP) harbor extremely high densities of mesograzers (small invertebrate predators approximately 1-25 mm in length) such as benthic amphipods, as well as rich assemblages of macroalgae, endophytes, and macroinvertebrates. Unlike temperate and tropical shallow marine environments, where fish and sea urchins are key grazers structuring the community, mesograzers appear to be much more important in the WAP. Accordingly, the proposed research has two main objectives: (1) To further investigate the interactions between the ecologically dominant large macrophytes, filamentous epi/endophytes, and mesograzers and (2) To determine the nature of interactions between mesograzers and sessile invertebrates. Specifically, the research will examine the following hypotheses: 1: The effects of endophytes on macrophytes are often negative, and consequently macrophytes defend against endophytic infection. 2: Mesoherbivores prevent filamentous algal species, common in the intertidal, from dominating subtidal assemblages. 3: Mesograzer predation pressure on sessile benthic macroinvertebrates, primarily sponges and tunicates, is greatest in shallow habitats dominated by macrophytes, and this impacts depth distributions of macroinvertebrate species. 4: Benthic macroinvertebrates may defend against mesograzers with secondary metabolites which effect molting and/or deter feeding. Broader impacts include involvement of undergraduates, including minorities, in research; training of graduate students, and continuation of the highly successful UAB IN ANTARCTICA interactive web program (two time recipient of awards of excellence from the US Council for Advancement and Support of Education). The researchers also will share their scientific endeavors with teachers, K-12 students, and other members of the community at large while in residence in Antarctica. In addition, the investigators will request the participation of a PolarTREC teacher.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Algae; Antarctica; Antarctic Peninsula; Biota; Oceans; Southern Ocean", "locations": "Southern Ocean; Antarctica; Antarctic Peninsula", "north": -60.0, "nsf_funding_programs": null, "persons": "Baker, Bill", "project_titles": "Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula; Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula - continuing", "projects": [{"proj_uid": "p0000475", "repository": "USAP-DC", "title": "Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula"}, {"proj_uid": "p0010016", "repository": "USAP-DC", "title": "Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula - continuing"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula", "uid": "600096", "west": -180.0}, {"awards": "0902957 Robinson, Laura", "bounds_geometry": ["POLYGON((-70.5 -54.5,-66.95 -54.5,-63.4 -54.5,-59.85 -54.5,-56.3 -54.5,-52.75 -54.5,-49.2 -54.5,-45.65 -54.5,-42.1 -54.5,-38.55 -54.5,-35 -54.5,-35 -55.2,-35 -55.9,-35 -56.6,-35 -57.3,-35 -58,-35 -58.7,-35 -59.4,-35 -60.1,-35 -60.8,-35 -61.5,-38.55 -61.5,-42.1 -61.5,-45.65 -61.5,-49.2 -61.5,-52.75 -61.5,-56.3 -61.5,-59.85 -61.5,-63.4 -61.5,-66.95 -61.5,-70.5 -61.5,-70.5 -60.8,-70.5 -60.1,-70.5 -59.4,-70.5 -58.7,-70.5 -58,-70.5 -57.3,-70.5 -56.6,-70.5 -55.9,-70.5 -55.2,-70.5 -54.5))"], "date_created": "Sat, 01 Jan 2011 00:00:00 GMT", "description": "The proposal seeks funds to continue a follow-up analytical work of deep-sea corals collected in the Drake Passage during a research cruise. The project\u0027s goal is paleo-climate research looking to constrain the depth structure and time evolution of the radiocarbon content of the Southern Ocean during the glacial and deglaciation. Radiocarbon is a versatile tracer of past climate; its radioactive decay provides an internal clock with which to assess the rates of processes, and it can be used to trace the movement of carbon through the Earth\u0027s system. It enters the ocean through air-sea gas exchange, so processes that limits this will, therefore, reduce the radiocarbon content of both surface and deep waters. The Southern Ocean is a critical location for exchange of heat and carbon between the deep-ocean and atmospheric reservoirs, and the deep waters formed there fill large volumes of the global deep and intermediate oceans. As strong currents tend to scour away sediments, carbonate preservation is limited, and radiocarbon reservoir ages are poorly constrained, many traditional paleoceanographic techniques become impractical. It is proposed to alleviate these difficulties analyzing the chemical composition of deep-sea coral skeletons. Their aragonitic skeletons can be precisely dated using U-series decay, and when coupled with radiocarbon analyses will allow to calculate the C14/C12 ratio of the past water column.", "east": -35.0, "geometry": ["POINT(-52.75 -58)"], "keywords": "Biota; Corals; Drake Passage; Geochronology; NBP0805; Oceans; Paleoclimate; Radiocarbon; Southern Ocean", "locations": "Drake Passage; Southern Ocean", "north": -54.5, "nsf_funding_programs": null, "persons": "Robinson, Laura", "project_titles": "LGM and Deglacial Radiocarbon from U-series Dated Drake Passage Deep-sea Corals", "projects": [{"proj_uid": "p0000519", "repository": "USAP-DC", "title": "LGM and Deglacial Radiocarbon from U-series Dated Drake Passage Deep-sea Corals"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -61.5, "title": "LGM and Deglacial Radiocarbon from U-series Dated Drake Passage Deep-sea Corals", "uid": "600111", "west": -70.5}, {"awards": "0842639 Soreghan, Gerilyn", "bounds_geometry": ["POLYGON((-163.12865 -77.41693,-163.06062 -77.41693,-162.99259 -77.41693,-162.92456 -77.41693,-162.85653 -77.41693,-162.7885 -77.41693,-162.72047 -77.41693,-162.65244 -77.41693,-162.58441 -77.41693,-162.51638 -77.41693,-162.44835 -77.41693,-162.44835 -77.445495,-162.44835 -77.47406,-162.44835 -77.502625,-162.44835 -77.53119,-162.44835 -77.559755,-162.44835 -77.58832,-162.44835 -77.616885,-162.44835 -77.64545,-162.44835 -77.674015,-162.44835 -77.70258,-162.51638 -77.70258,-162.58441 -77.70258,-162.65244 -77.70258,-162.72047 -77.70258,-162.7885 -77.70258,-162.85653 -77.70258,-162.92456 -77.70258,-162.99259 -77.70258,-163.06062 -77.70258,-163.12865 -77.70258,-163.12865 -77.674015,-163.12865 -77.64545,-163.12865 -77.616885,-163.12865 -77.58832,-163.12865 -77.559755,-163.12865 -77.53119,-163.12865 -77.502625,-163.12865 -77.47406,-163.12865 -77.445495,-163.12865 -77.41693))"], "date_created": "Sat, 01 Jan 2011 00:00:00 GMT", "description": "The proposed research seeks to test the hypothesis that chemical and physical weathering in proximal alluvial systems will show systematic and measurable variations between glacial and nonglacial systems. To accomplish this, the investigation will attempt to quantify the natural variation of chemical and physical weathering in granitoid-sourced proximal alluvial sediments in end-member glacial and nonglacial systems, when other, \u0027non-climatic\u0027 factors (e.g. provenance, drainage basin area and relief, sample grain size, sediment facies) are controlled. If chemical weathering in the proposed hot-humid, hot-arid, hot semi-arid nonglacial systems and the cool-wet, cold semi-arid, and cold-arid glacial systems show systematic variations, then chemical indices may be used to help differentiate paleoclimatic conditions. Continued reliance on students provides a broader impact of this proposed research and firmly grounds this effort in its educational mission.", "east": -162.44835, "geometry": ["POINT(-162.7885 -77.559755)"], "keywords": "Antarctica; Chemistry:fluid; Chemistry:Fluid; Chemistry:rock; Chemistry:Rock; Chemistry:sediment; Chemistry:Sediment; Critical Zone; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet", "locations": "Antarctica", "north": -77.41693, "nsf_funding_programs": null, "persons": "Soreghan, Gerilyn; Elwood Madden, Megan", "project_titles": "Development of Quantitative Weathering Indicators in Proximal Alluvial Sediments to Assess Glacial Activity in the Rock Record", "projects": [{"proj_uid": "p0000518", "repository": "USAP-DC", "title": "Development of Quantitative Weathering Indicators in Proximal Alluvial Sediments to Assess Glacial Activity in the Rock Record"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.70258, "title": "Development of Quantitative Weathering Indicators in Proximal Alluvial Sediments to Assess Glacial Activity in the Rock Record", "uid": "600110", "west": -163.12865}, {"awards": "0839084 Ortland, David", "bounds_geometry": ["POLYGON((-63 -59,-62 -59,-61 -59,-60 -59,-59 -59,-58 -59,-57 -59,-56 -59,-55 -59,-54 -59,-53 -59,-53 -59.6,-53 -60.2,-53 -60.8,-53 -61.4,-53 -62,-53 -62.6,-53 -63.2,-53 -63.8,-53 -64.4,-53 -65,-54 -65,-55 -65,-56 -65,-57 -65,-58 -65,-59 -65,-60 -65,-61 -65,-62 -65,-63 -65,-63 -64.4,-63 -63.8,-63 -63.2,-63 -62.6,-63 -62,-63 -61.4,-63 -60.8,-63 -60.2,-63 -59.6,-63 -59))"], "date_created": "Sat, 01 Jan 2011 00:00:00 GMT", "description": "The project will employ a sophisticated meteor radar at the Brazilian Antarctic station Comandante Ferraz on King George Island for a number of synergetic research efforts of high interest to the international aeronomical community. The location of the radar will be at the tip of the Antarctic Peninsula - at a critical southern latitude of 62 degrees - to fill a current measurement gap from 54 to 68 degrees south. The radar will play a key role in Antarctic and inter-hemispheric studies of neutral atmosphere dynamics, defining global mesosphere and lower thermosphere structure and variability (from 80 to 105 km) and guiding advances of models accounting for the dynamics of this high-altitude region, including general circulation models, and climate and numerical weather prediction models. The unique radar measurement sensitivity will enable studies of: (1) the large-scale circulation and planetary waves, (2) the tidal structure and variability, (3) the momentum transport by small-scale gravity waves, (4) important, but unquantified, gravity wave - tidal interactions, (5) polar mesosphere summer echoes, and (6) meteor fluxes, head echoes, and non-specular trails, a number of which exhibit high latitudinal gradients at these latitudes. This radar will support extensive collaborations with U.S. and other scientists making measurements at other Antarctic and Arctic conjugate sites, including Brazilian scientists at C. Ferraz and U.S. and international colleagues having other instrumentation in the Antarctic, Arctic, and within South America. Links to the University of Colorado in the U.S., Instituto Nacional de Pesquisas Espaciais (INPE) in Brazil and Universidad Nacional de La Plata in Argentina will provide unique research opportunities for graduate and undergraduate students in the U.S. and South America.", "east": -53.0, "geometry": ["POINT(-58 -62)"], "keywords": "Antarctica; Atmosphere; Meteorology; Meteor Radar", "locations": "Antarctica", "north": -59.0, "nsf_funding_programs": null, "persons": "Fritts, David; Janches, Diego", "project_titles": "Large- and Small-scale Dynamics and Meteor Studies in the MLT with a New-generation Meteor Radar on King George Island", "projects": [{"proj_uid": "p0000670", "repository": "USAP-DC", "title": "Large- and Small-scale Dynamics and Meteor Studies in the MLT with a New-generation Meteor Radar on King George Island"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.0, "title": "Large- and Small-scale Dynamics and Meteor Studies in the MLT with a New-generation Meteor Radar on King George Island", "uid": "600107", "west": -63.0}, {"awards": "0739780 Taylor, Kendrick", "bounds_geometry": ["POINT(-112.117 -79.666)"], "date_created": "Sat, 01 Jan 2011 00:00:00 GMT", "description": "This award supports a project to develop a 2,000-year high-temporal resolution record of biomass burning from the analysis of black carbon in the WAIS Divide bedrock ice core. Pilot data for the WAIS WD05A core demonstrates that we now have the ability to reconstruct this record with minimal impact on the amount of ice available for other projects. The intellectual merit of this project is that black carbon (BC) aerosols result solely from combustion and play a critical but poorly quantified role in global climate forcing and the carbon cycle. When incorporated into snow and ice, BC increases absorption of solar radiation making seasonal snow packs, mountain glaciers, polar ice sheets, and sea ice much more vulnerable to climate warming. BC emissions in the Southern Hemisphere are dominated by biomass burning in the tropical regions of Southern Africa, South America and South Asia. Biomass burning, which results from both climate and human activities, alters the atmospheric composition of greenhouse gases, aerosols and perturbs key biogeochemical cycles. A long-term record of biomass burning is needed to aid in the interpretation of ice core gas composition and will provide important information regarding human impacts on the environment and climate before instrumental records.", "east": -112.117, "geometry": ["POINT(-112.117 -79.666)"], "keywords": "Antarctica; Atmosphere; Black Carbon; Chemistry:ice; Chemistry:Ice; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; WAIS Divide; WAIS Divide Ice Core", "locations": "WAIS Divide; Antarctica", "north": -79.666, "nsf_funding_programs": null, "persons": "Taylor, Kendrick C.", "project_titles": "WAIS DIVIDE - High Temporal Resolution Black Carbon Record of Southern Hemisphere Biomass Burning", "projects": [{"proj_uid": "p0000022", "repository": "USAP-DC", "title": "WAIS DIVIDE - High Temporal Resolution Black Carbon Record of Southern Hemisphere Biomass Burning"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.666, "title": "WAIS DIVIDE - High Temporal Resolution Black Carbon Record of Southern Hemisphere Biomass Burning", "uid": "600142", "west": -112.117}, {"awards": "0528728 Vernet, Maria", "bounds_geometry": ["POLYGON((-69.08 -64.8,-68.632 -64.8,-68.184 -64.8,-67.736 -64.8,-67.288 -64.8,-66.84 -64.8,-66.392 -64.8,-65.944 -64.8,-65.496 -64.8,-65.048 -64.8,-64.6 -64.8,-64.6 -65.121,-64.6 -65.442,-64.6 -65.763,-64.6 -66.084,-64.6 -66.405,-64.6 -66.726,-64.6 -67.047,-64.6 -67.368,-64.6 -67.689,-64.6 -68.01,-65.048 -68.01,-65.496 -68.01,-65.944 -68.01,-66.392 -68.01,-66.84 -68.01,-67.288 -68.01,-67.736 -68.01,-68.184 -68.01,-68.632 -68.01,-69.08 -68.01,-69.08 -67.689,-69.08 -67.368,-69.08 -67.047,-69.08 -66.726,-69.08 -66.405,-69.08 -66.084,-69.08 -65.763,-69.08 -65.442,-69.08 -65.121,-69.08 -64.8))"], "date_created": "Sat, 01 Jan 2011 00:00:00 GMT", "description": "This collaborative study between the Desert Research Institute, the University of California, Santa Barbara (0529087; Robin Ross), and the University of California, San Diego (0528728; Maria Vernet) will examine the relationship between sea ice extent along the Antarctic Peninsula and the life history of krill (Euphausia superba), by developing, refining, and linking diagnostic datasets and models of phytoplankton decreases in the fall, phytoplankton biomass incorporation into sea ice, sea ice growth dynamics, sea ice algal production and biomass accumulation, and larval krill energetics, condition, and survival. Krill is a key species in the food web of the Southern Ocean ecosystem, and one that is intricately involved with seasonal sea ice dynamics. Results from the Southern Ocean experiment of the Global Ocean Ecosystems Dynamics program (SO-Globec) field work as well as historical information on sea ice dynamics and krill recruitment suggest a shift in the paradigm that all pack ice is equally good krill habitat. SO-Globec is a multidisciplinary effort focused on understanding the physical and biological factors that influence growth, reproduction, recruitment and survival of Antarctic krill (Euphausia superba). The program uses a multi-trophic level approach that includes the predators and competitors of Antarctic krill, represented by other zooplankton, fish, penguins, seals, and cetaceans. This collaborative project is concerned with the synthesis and modeling of lower trophic levels.", "east": -64.6, "geometry": ["POINT(-66.84 -66.405)"], "keywords": "Bellingshausen Sea; Biota; Oceans; Phytoplankton; Southern Ocean", "locations": "Southern Ocean; Bellingshausen Sea", "north": -64.8, "nsf_funding_programs": null, "persons": "Vernet, Maria", "project_titles": "Collaborative Research: U.S. SO GLOBEC Synthesis and Modeling: Timing is Everything: The Dynamic Coupling among Phytoplankton, Ice, Ice Algae and Krill (PIIAK)", "projects": [{"proj_uid": "p0000522", "repository": "USAP-DC", "title": "Collaborative Research: U.S. SO GLOBEC Synthesis and Modeling: Timing is Everything: The Dynamic Coupling among Phytoplankton, Ice, Ice Algae and Krill (PIIAK)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -68.01, "title": "The Dynamic Coupling among Phytoplankton, Ice, Ice Algae and Krill (PIIAK)", "uid": "600048", "west": -69.08}, {"awards": "0529087 Ross, Robin", "bounds_geometry": ["POLYGON((-71 -61,-70 -61,-69 -61,-68 -61,-67 -61,-66 -61,-65 -61,-64 -61,-63 -61,-62 -61,-61 -61,-61 -61.9,-61 -62.8,-61 -63.7,-61 -64.6,-61 -65.5,-61 -66.4,-61 -67.3,-61 -68.2,-61 -69.1,-61 -70,-62 -70,-63 -70,-64 -70,-65 -70,-66 -70,-67 -70,-68 -70,-69 -70,-70 -70,-71 -70,-71 -69.1,-71 -68.2,-71 -67.3,-71 -66.4,-71 -65.5,-71 -64.6,-71 -63.7,-71 -62.8,-71 -61.9,-71 -61))"], "date_created": "Sat, 01 Jan 2011 00:00:00 GMT", "description": "This collaborative study between the Desert Research Institute, the University of California, Santa Barbara (0529087; Robin Ross), and the University of California, San Diego (0528728; Maria Vernet) will examine the relationship between sea ice extent along the Antarctic Peninsula and the life history of krill (Euphausia superba), by developing, refining, and linking diagnostic datasets and models of phytoplankton decreases in the fall, phytoplankton biomass incorporation into sea ice, sea ice growth dynamics, sea ice algal production and biomass accumulation, and larval krill energetics, condition, and survival. Krill is a key species in the food web of the Southern Ocean ecosystem, and one that is intricately involved with seasonal sea ice dynamics. Results from the Southern Ocean experiment of the Global Ocean Ecosystems Dynamics program (SO-Globec) field work as well as historical information on sea ice dynamics and krill recruitment suggest a shift in the paradigm that all pack ice is equally good krill habitat. SO-Globec is a multidisciplinary effort focused on understanding the physical and biological factors that influence growth, reproduction, recruitment and survival of Antarctic krill (Euphausia superba). The program uses a multi-trophic level approach that includes the predators and competitors of Antarctic krill, represented by other zooplankton, fish, penguins, seals, and cetaceans. This collaborative project is concerned with the synthesis and modeling of lower trophic levels.", "east": -61.0, "geometry": ["POINT(-66 -65.5)"], "keywords": "Bellingshausen Sea; Biota; Oceans; Southern Ocean", "locations": "Bellingshausen Sea; Southern Ocean", "north": -61.0, "nsf_funding_programs": null, "persons": "Quetin, Langdon B.; Ross, Robin Macurda", "project_titles": "Collaborative Research: U.S. SO GLOBEC Synthesis and Modeling: Timing is Everything: The Dynamic Coupling among Phytoplankton, Ice, Ice Algae and Krill (PIIAK)", "projects": [{"proj_uid": "p0000522", "repository": "USAP-DC", "title": "Collaborative Research: U.S. SO GLOBEC Synthesis and Modeling: Timing is Everything: The Dynamic Coupling among Phytoplankton, Ice, Ice Algae and Krill (PIIAK)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -70.0, "title": "The Dynamic Coupling among Phytoplankton, Ice, Ice Algae and Krill (PIIAK)", "uid": "600049", "west": -71.0}, {"awards": "0529666 Fritsen, Christian", "bounds_geometry": ["POLYGON((-180 -39.23,-144 -39.23,-108 -39.23,-72 -39.23,-36 -39.23,0 -39.23,36 -39.23,72 -39.23,108 -39.23,144 -39.23,180 -39.23,180 -44.307,180 -49.384,180 -54.461,180 -59.538,180 -64.615,180 -69.692,180 -74.769,180 -79.846,180 -84.923,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -84.923,-180 -79.846,-180 -74.769,-180 -69.692,-180 -64.615,-180 -59.538,-180 -54.461,-180 -49.384,-180 -44.307,-180 -39.23))"], "date_created": "Sat, 01 Jan 2011 00:00:00 GMT", "description": "This collaborative study between the Desert Research Institute, the University of California, Santa Barbara (0529087; Robin Ross), and the University of California, San Diego (0528728; Maria Vernet) will examine the relationship between sea ice extent along the Antarctic Peninsula and the life history of krill (Euphausia superba), by developing, refining, and linking diagnostic datasets and models of phytoplankton decreases in the fall, phytoplankton biomass incorporation into sea ice, sea ice growth dynamics, sea ice algal production and biomass accumulation, and larval krill energetics, condition, and survival. Krill is a key species in the food web of the Southern Ocean ecosystem, and one that is intricately involved with seasonal sea ice dynamics. Results from the Southern Ocean experiment of the Global Ocean Ecosystems Dynamics program (SO-Globec) field work as well as historical information on sea ice dynamics and krill recruitment suggest a shift in the paradigm that all pack ice is equally good krill habitat. SO-Globec is a multidisciplinary effort focused on understanding the physical and biological factors that influence growth, reproduction, recruitment and survival of Antarctic krill (Euphausia superba). The program uses a multi-trophic level approach that includes the predators and competitors of Antarctic krill, represented by other zooplankton, fish, penguins, seals, and cetaceans. It is currently in a synthesis and modeling phase. This collaborative project is concerned with the lower trophic levels, and will be integrated with other synthesis and modeling studies that deal with grazers, predators, and other higher trophic levels.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Bellingshausen Sea; Cryosphere; Oceans; Photosynthetically Active Radiation (par); Sea Ice; Sea Surface; Southern Ocean; Total Integrated Exposure To PAR", "locations": "Bellingshausen Sea; Southern Ocean; Sea Surface", "north": -39.23, "nsf_funding_programs": null, "persons": "Fritsen, Christian", "project_titles": "Collaborative Research: U.S. SO GLOBEC Synthesis and Modeling: Timing is Everything: The Dynamic Coupling among Phytoplankton, Ice, Ice Algae and Krill (PIIAK)", "projects": [{"proj_uid": "p0000522", "repository": "USAP-DC", "title": "Collaborative Research: U.S. SO GLOBEC Synthesis and Modeling: Timing is Everything: The Dynamic Coupling among Phytoplankton, Ice, Ice Algae and Krill (PIIAK)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "The Dynamic Coupling among Phytoplankton, Ice, Ice Algae and Krill (PIIAK)", "uid": "600050", "west": -180.0}, {"awards": "0537609 Gee, Jeffrey", "bounds_geometry": ["POLYGON((-52.9943 -82.6146,-52.990539 -82.6146,-52.986778 -82.6146,-52.983017 -82.6146,-52.979256 -82.6146,-52.975495 -82.6146,-52.971734 -82.6146,-52.967973 -82.6146,-52.964212 -82.6146,-52.960451 -82.6146,-52.95669 -82.6146,-52.95669 -82.615118,-52.95669 -82.615636,-52.95669 -82.616154,-52.95669 -82.616672,-52.95669 -82.61719,-52.95669 -82.617708,-52.95669 -82.618226,-52.95669 -82.618744,-52.95669 -82.619262,-52.95669 -82.61978,-52.960451 -82.61978,-52.964212 -82.61978,-52.967973 -82.61978,-52.971734 -82.61978,-52.975495 -82.61978,-52.979256 -82.61978,-52.983017 -82.61978,-52.986778 -82.61978,-52.990539 -82.61978,-52.9943 -82.61978,-52.9943 -82.619262,-52.9943 -82.618744,-52.9943 -82.618226,-52.9943 -82.617708,-52.9943 -82.61719,-52.9943 -82.616672,-52.9943 -82.616154,-52.9943 -82.615636,-52.9943 -82.615118,-52.9943 -82.6146))"], "date_created": "Sat, 01 Jan 2011 00:00:00 GMT", "description": "This project studies remnant magnetization in igneous rocks from the Dufek igneous complex, Antarctica. Its primary goal is to understand variations in the Earth\u0027s magnetic field during the Mesozoic Dipole Low (MDL), a period when the Earth\u0027s magnetic field underwent dramatic weakening and rapid reversals. This work will resolve the MDL\u0027s timing and nature, and assess connections between reversal rate, geomagnetic intensity and directional variability, and large-scale geodynamic processes. The project also includes petrologic studies to determine cooling rate effects on magnetic signatures, and understand assembly of the Dufek as an igneous body. Poorly studied, the Dufek is amongst the world\u0027s largest intrusions and its formation is connected to the break-up of Gondwana. The broader impacts of this project include graduate and undergraduate education and international collaboration with a German and Chilean IPY project.", "east": -52.95669, "geometry": ["POINT(-52.975495 -82.61719)"], "keywords": "Antarctica; Dufek Complex; Geology/Geophysics - Other; Paleomagnetism; Solid Earth", "locations": "Antarctica", "north": -82.6146, "nsf_funding_programs": null, "persons": "Gee, Jeffrey", "project_titles": "Collaborative Research: An Integrated Geomagnetic and Petrologic Study of the Dufek Complex", "projects": [{"proj_uid": "p0000510", "repository": "USAP-DC", "title": "Collaborative Research: An Integrated Geomagnetic and Petrologic Study of the Dufek Complex"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -82.61978, "title": "An Integrated Geomagnetic and Petrologic Study of the Dufek Complex", "uid": "600053", "west": -52.9943}, {"awards": "0542111 Lonsdale, Darcy", "bounds_geometry": ["POINT(-166.287 -76.5799)"], "date_created": "Sat, 01 Jan 2011 00:00:00 GMT", "description": "Recent studies of marine ecosystems show conflicting evidence for trophic cascades, and in particular the relative strength of the crustacean zooplankton-phytoplankton link. The Ross Sea is a natural laboratory for investigating this apparent conflict. It is a site of seasonally high abundances of phytoplankton, characterized by regions of distinct phytoplankton taxa; the southcentral polynya is strongly dominated by the colony-forming prymnesiophyte Phaeocystis antarctica, while coastal regions of this sea are typically dominated by diatoms or flagellate species. Recent studies indicate that, while the south-central polynya exhibits a massive phytoplankton bloom, the poor food quality of P. antarctica for many crustacean zooplankton prevents direct utilization of much of this phytoplankton bloom. Rather, evidence suggests that indirect utilization of this production may be the primary mechanism by which carbon and energy become available to those higher trophic levels. Specifically, we hypothesized that nano- and microzooplankton constitute an important food source for crustacean zooplankton (largely copepods and juvenile euphausiids) during the summer period in the Ross Sea where the phytoplankton assemblage is dominated by the prymnesiophyte. In turn, we also hypothesize that predation by copepods (and other Crustacea) controls and structures the species composition of these protistan assemblages. We occupied stations in the south-central Ross Sea Polynya (RSP) and Terra Nova Bay (TNB) during austral summer to test these hypotheses. We hypothesized that the diatom species that dominate the phytoplankton assemblage in TNB constitute a direct source of nutrition to herbivorous/omnivorous zooplankton (relative to the situation in the south-central RSP). That is, the contribution of heterotrophic protists to crustacean diets will be reduced in TNB. Our research addressed fundamental gaps in our knowledge of food web structure and trophic cascades.", "east": -166.287, "geometry": ["POINT(-166.287 -76.5799)"], "keywords": "Antarctica; Biota; Crustacea; Oceans; Phytoplankton; Ross Sea; Southern Ocean", "locations": "Ross Sea; Antarctica; Southern Ocean", "north": -76.5799, "nsf_funding_programs": null, "persons": "Lonsdale, Darcy", "project_titles": "Collaborative Research: Do Crustacean Zooplankton Play a Pivotal Role in Structuring Heterotrophic Plankton Communities in the Ross Sea?", "projects": [{"proj_uid": "p0000520", "repository": "USAP-DC", "title": "Collaborative Research: Do Crustacean Zooplankton Play a Pivotal Role in Structuring Heterotrophic Plankton Communities in the Ross Sea?"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -76.5799, "title": "Do Crustacean Zooplankton Play a Pivotal Role in Structuring Heterotrophic Plankton Communities in the Ross Sea?", "uid": "600059", "west": -166.287}, {"awards": "0542164 Taylor, Michael", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Sat, 01 Jan 2011 00:00:00 GMT", "description": "A focused plan is presented to investigate the role and importance of short period (\u003c1 hour) gravity waves on the dynamics of the Antarctic Mesosphere and Lower Thermosphere (MLT) region (~80-100 km). Excited primarily by deep convection, frontal activity, topography, and strong wind shears in the lower atmosphere, these waves transport energy and momentum upwards where they have a profound influence on the MLT dynamics. Most of the wave forcing is expected to occur at mid-and low-latitudes where such sources predominate. However, short-period waves (exhibiting similar characteristics to mid-latitude events) have now been detected in copious quantities from research sites on the Antarctic Peninsula and the coastal regions exhibiting strong anisotropy in their dominant horizontal motions (and hence their momentum fluxes). Radiosonde measurements have established the existence of ubiquitous gravity wave activity at South Pole but, to date, there have been no detailed measurements of the properties of short-period waves at MLT heights deep in the Antarctic interior. In particular, the South Pole Station is uniquely situated to investigate the filtering and penetration of these waves into the MLT region, a substantial fraction of which may be ducted waves traveling over vast geographic distances (several thousand km). Novel image measurements at South Pole Station combined with existing measurement programs will provide an unprecedented capability for quantifying the role of these gravity waves on the regional MLT dynamics over central Antarctica. This research also contributes to the training and education of both the graduate and undergraduate students.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Atmosphere; Meteorology; Radiosonde; South Pole", "locations": "South Pole; Antarctica", "north": -60.0, "nsf_funding_programs": null, "persons": "Taylor, Michael", "project_titles": "Quantifying the Role of Short-Period Gravity Waves on the Antarctic Mesospheric Dynamics Using an Advanced Mesospheric Temperature Mapper", "projects": [{"proj_uid": "p0000684", "repository": "USAP-DC", "title": "Quantifying the Role of Short-Period Gravity Waves on the Antarctic Mesospheric Dynamics Using an Advanced Mesospheric Temperature Mapper"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Quantifying the Role of Short-Period Gravity Waves on the Antarctic Mesospheric Dynamics Using an Advanced Mesospheric Temperature Mapper", "uid": "600060", "west": -180.0}, {"awards": "0632389 Murray, Alison", "bounds_geometry": ["POLYGON((-65.3827 -64.4213,-65.13333 -64.4213,-64.88396 -64.4213,-64.63459 -64.4213,-64.38522 -64.4213,-64.13585 -64.4213,-63.88648 -64.4213,-63.63711 -64.4213,-63.38774 -64.4213,-63.13837 -64.4213,-62.889 -64.4213,-62.889 -64.47176,-62.889 -64.52222,-62.889 -64.57268,-62.889 -64.62314,-62.889 -64.6736,-62.889 -64.72406,-62.889 -64.77452,-62.889 -64.82498,-62.889 -64.87544,-62.889 -64.9259,-63.13837 -64.9259,-63.38774 -64.9259,-63.63711 -64.9259,-63.88648 -64.9259,-64.13585 -64.9259,-64.38522 -64.9259,-64.63459 -64.9259,-64.88396 -64.9259,-65.13333 -64.9259,-65.3827 -64.9259,-65.3827 -64.87544,-65.3827 -64.82498,-65.3827 -64.77452,-65.3827 -64.72406,-65.3827 -64.6736,-65.3827 -64.62314,-65.3827 -64.57268,-65.3827 -64.52222,-65.3827 -64.47176,-65.3827 -64.4213))"], "date_created": "Sat, 01 Jan 2011 00:00:00 GMT", "description": "The Western Antarctic Peninsula is experiencing one of the most rapid rates of climate warming on Earth, with an increase of 5degrees C in the mean winter temperature in 50 years. Impacts on upper trophic levels are evident, though there have been few, if any studies that have considered the impacts on bacterioplankton in the Southern Ocean. This proposal will characterize the winter bacterioplankton genome, transcriptome, and proteome and discover those features (community composition, genes up-regulated, and proteins expressed) that are essential to winter bacterioplankton survival and livelihood. We have assembled a polar ocean ecology and genomics network including strategic partnerships with Palmer LTER, the British Antarctic Survey\u0027s ocean metagenome program, US and Canadian scientists studying the Arctic Ocean genome, an Australian colleague who specialized in archaeal proteomics, and French colleagues studying Sub-Antarctic and Coastal Adelie Land marine bacterioplankton. The primary objectives of this program are: 1 Describe the differences in diversity and genomic content between austral winter and summer bacterioplankton communities. 2. Investigate the winter-time bacterioplankton growth and cellular signals (mRNA and proteins expressed) in order to understand the specific adaptations key to survival. Our results will extend from the Antarctic to the Arctic - as the cold, dark, carbon-limited deep seas linking these two systems have many common features. Education and outreach activities target (i) undergraduate and graduate students, hopefully including minority students recruited through the Diversity in Research in Environmental and Marine Sciences (DREAMS) Program at VIMS; (ii) a broad audience with our education and outreach partnerships with The Cousteau Society and with the Census for Antarctic Marine Life program. Data and links to external databases will be listed on the http://genex2.dri.edu website. Sequence data will be publicly accessible in GenBank and IMG-M databases.", "east": -62.889, "geometry": ["POINT(-64.13585 -64.6736)"], "keywords": "Antarctica; Antarctic Peninsula; Biota; Chemistry:fluid; Chemistry:Fluid; Oceans; Southern Ocean", "locations": "Antarctica; Southern Ocean; Antarctic Peninsula", "north": -64.4213, "nsf_funding_programs": null, "persons": "Grzymski, Joseph; Murray, Alison", "project_titles": "IPY: Bacterioplankton Genomic Adaptations to Antarctic Winter", "projects": [{"proj_uid": "p0000091", "repository": "USAP-DC", "title": "IPY: Bacterioplankton Genomic Adaptations to Antarctic Winter"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.9259, "title": "IPY: Bacterioplankton Genomic Adaptations to Antarctic Winter", "uid": "600061", "west": -65.3827}, {"awards": "0636319 Shaw, Timothy", "bounds_geometry": ["POLYGON((-51.9201 -57.5061,-50.99447 -57.5061,-50.06884 -57.5061,-49.14321 -57.5061,-48.21758 -57.5061,-47.29195 -57.5061,-46.36632 -57.5061,-45.44069 -57.5061,-44.51506 -57.5061,-43.58943 -57.5061,-42.6638 -57.5061,-42.6638 -58.03449,-42.6638 -58.56288,-42.6638 -59.09127,-42.6638 -59.61966,-42.6638 -60.14805,-42.6638 -60.67644,-42.6638 -61.20483,-42.6638 -61.73322,-42.6638 -62.26161,-42.6638 -62.79,-43.58943 -62.79,-44.51506 -62.79,-45.44069 -62.79,-46.36632 -62.79,-47.29195 -62.79,-48.21758 -62.79,-49.14321 -62.79,-50.06884 -62.79,-50.99447 -62.79,-51.9201 -62.79,-51.9201 -62.26161,-51.9201 -61.73322,-51.9201 -61.20483,-51.9201 -60.67644,-51.9201 -60.14805,-51.9201 -59.61966,-51.9201 -59.09127,-51.9201 -58.56288,-51.9201 -58.03449,-51.9201 -57.5061))"], "date_created": "Sat, 01 Jan 2011 00:00:00 GMT", "description": "Atmospheric warming has been associated with retreating glaciers, disintegrating ice shelves, and the increasing prevalence of icebergs in the Southern Ocean over the last decade. Our preliminary study of two icebergs in the NW Weddell Sea, an area of high iceberg concentration, showed significant delivery of terrestrial material accompanied by significant enhancement of phytoplankton and zooplankton/micronekton abundance, and primary production surrounding the icebergs. We hypothesize that nutrient enrichment by free-drifting icebergs will increase primary production and sedimentation of organic carbon, thus increasing the draw-down and sequestration of CO2 in the Southern Ocean and impacting the global carbon cycle. Our research addresses the following questions:1) What is the relationship between the physical dynamics of free-drifting icebergs and the Fe and nutrient distributions of the surrounding water column? 2) What is the relationship between Fe and nutrient distributions associated with free-drifting icebergs and the organic carbon dynamics of the ice-attached and surrounding pelagic communities (microbes, zooplankton, micronekton)? 3) What is impact on the export flux of particulate organic carbon from the mixed layer? An interdisciplinary approach is proposed to examine iceberg structure and dynamics, biogeochemical processes, and carbon cycling that includes measurement of trace element, nutrient and radionuclide distributions; organic carbon dynamics mediated by microbial, ice-attached and zooplankton communities; and particulate organic carbon export fluxes. Results from this project will further our understanding of the relationship between climate change and carbon sequestration in the Southern Ocean. Our findings will be incorporated into the Antarctic Research division of the Ocean Exploration Center (OEC) as part of the SIOExplorer: Digital Library Project. The OEC allows users to access content, which is classified to one of four levels: entry (grade K-6), student (grade 6-12), college, and research. Graduate students, undergraduates, teachers, and volunteers are important participants in the proposed field and laboratory work. For the K-12 level, a professional writer of children\u0027s books will participate in cruises to produce an account of the expedition and a daily interactive website.", "east": -42.6638, "geometry": ["POINT(-47.29195 -60.14805)"], "keywords": "Biota; Chemistry:fluid; Chemistry:Fluid; Geochemistry; Oceans; Sea Ice; Sea Surface; Southern Ocean; Weddell Sea", "locations": "Weddell Sea; Southern Ocean; Sea Surface", "north": -57.5061, "nsf_funding_programs": null, "persons": "Shaw, Tim; Twining, Benjamin", "project_titles": "Collaborative Research: Free Drifting Icebergs as Proliferation Sites of Iron Enrichment, Organic Carbon Production and Export in the Southern Ocean", "projects": [{"proj_uid": "p0000511", "repository": "USAP-DC", "title": "Collaborative Research: Free Drifting Icebergs as Proliferation Sites of Iron Enrichment, Organic Carbon Production and Export in the Southern Ocean"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -62.79, "title": "Free Drifting Icebergs as Proliferation Sites of Iron Enrichment, Organic Carbon Production and Export in the Southern Ocean", "uid": "600064", "west": -51.9201}, {"awards": "0739491 Sowers, Todd", "bounds_geometry": ["POLYGON((-180 90,-144 90,-108 90,-72 90,-36 90,0 90,36 90,72 90,108 90,144 90,180 90,180 72,180 54,180 36,180 18,180 0,180 -18,180 -36,180 -54,180 -72,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -72,-180 -54,-180 -36,-180 -18,-180 0,-180 18,-180 36,-180 54,-180 72,-180 90))"], "date_created": "Sat, 01 Jan 2011 00:00:00 GMT", "description": "This data set contains depth profiles for delta carbon-13 (\u0026#948;13C) and delta deuterium (\u0026#948;D) of methane (CH\u003csub\u003e4\u003c/sub\u003e) in South Pole firn air. The investigators obtained air samples from two boreholes during December 2008 and January 2009, and subsequently determined isotope ratios at 18 depths. The profiles represent a roughly 100-year history of the isotopic composition of CH\u003csub\u003e4\u003c/sub\u003e at South Pole Station (no depth-age model provided).\n\nData are available via FTP as an ASCII text file (.txt) and a Microsoft Excel file (.xlsx).", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Atmosphere; Chemistry:fluid; Chemistry:Fluid; Geochemistry; Isotope; Paleoclimate; Snow/ice; Snow/Ice; South Pole", "locations": "Antarctica; South Pole", "north": 90.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Sowers, Todd A.", "project_titles": "Collaborative Research: Methane Isotopes, Hydrocarbons, and other Trace Gases in South Pole Firn Air", "projects": [{"proj_uid": "p0000162", "repository": "USAP-DC", "title": "Collaborative Research: Methane Isotopes, Hydrocarbons, and other Trace Gases in South Pole Firn Air"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Methane Isotopes in South Pole Firn Air, 2008", "uid": "609502", "west": -180.0}, {"awards": "0836061 Dennett, Mark", "bounds_geometry": ["POLYGON((-170 -69,-163 -69,-156 -69,-149 -69,-142 -69,-135 -69,-128 -69,-121 -69,-114 -69,-107 -69,-100 -69,-100 -70,-100 -71,-100 -72,-100 -73,-100 -74,-100 -75,-100 -76,-100 -77,-100 -78,-100 -79,-107 -79,-114 -79,-121 -79,-128 -79,-135 -79,-142 -79,-149 -79,-156 -79,-163 -79,-170 -79,-170 -78,-170 -77,-170 -76,-170 -75,-170 -74,-170 -73,-170 -72,-170 -71,-170 -70,-170 -69))"], "date_created": "Sat, 01 Jan 2011 00:00:00 GMT", "description": "Convincing evidence now confirms that polar regions are changing rapidly in response to human activities. Changes in sea ice extent and thickness will have profound implications for productivity, food webs and carbon fluxes at high latitudes, since sea ice biota are a significant source of biogenic matter for the ecosystem. While sea ice is often thought to be a barrier to gas exchange between the ocean and the atmosphere, it more likely functions as a source or sink for climate-active gases such as carbon dioxide and ozone-depleting organohalogens, due in part to activities of microbes embedded in the sea ice matrix. This project brings together experienced US and Swedish investigators to examine the controls by sea-ice biota on the production and degradation of key climate-active gases in the Pacific sector of the Southern Ocean. We hypothesize that 1) the physical properties of the sea-ice environment will determine the community structure and activities of the sea ice biota; 2) the productivity, biomass, physiological state and species composition of ice algae will determine the production of specific classes of organic carbon, including organohalogens; 3) heterotrophic co-metabolism within the ice will break down these compounds to some extent, depending on the microbial community structure and productivity, and 4) the sea ice to atmosphere fluxes of CO2 and organohalogens will be inversely related. This project will build close scientific collaborations between US and Swedish researchers and also train young scientists, including members of underrepresented groups. Dissemination of results will include the scientific literature, and public outreach venues including interactions with a PolarTrec teacher.", "east": -100.0, "geometry": ["POINT(-135 -74)"], "keywords": "Amundsen Sea; Antarctica; Biota; Oceans; Oden; Oden2008; Plankton; Sea Ice; Southern Ocean", "locations": "Antarctica; Southern Ocean; Amundsen Sea", "north": -69.0, "nsf_funding_programs": null, "persons": "Dennett, Mark", "project_titles": "Collaborative Research: Controls on climate-active gases by Amundsen Sea ice biota", "projects": [{"proj_uid": "p0000137", "repository": "USAP-DC", "title": "Collaborative Research: Controls on climate-active gases by Amundsen Sea ice biota"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.0, "title": "Controls on Climate-Active Gases by Amundsen Sea Ice Biota", "uid": "600091", "west": -170.0}, {"awards": "0944474 Robinson, Laura", "bounds_geometry": ["POLYGON((-70.5 -54.5,-66.95 -54.5,-63.4 -54.5,-59.85 -54.5,-56.3 -54.5,-52.75 -54.5,-49.2 -54.5,-45.65 -54.5,-42.1 -54.5,-38.55 -54.5,-35 -54.5,-35 -55.2,-35 -55.9,-35 -56.6,-35 -57.3,-35 -58,-35 -58.7,-35 -59.4,-35 -60.1,-35 -60.8,-35 -61.5,-38.55 -61.5,-42.1 -61.5,-45.65 -61.5,-49.2 -61.5,-52.75 -61.5,-56.3 -61.5,-59.85 -61.5,-63.4 -61.5,-66.95 -61.5,-70.5 -61.5,-70.5 -60.8,-70.5 -60.1,-70.5 -59.4,-70.5 -58.7,-70.5 -58,-70.5 -57.3,-70.5 -56.6,-70.5 -55.9,-70.5 -55.2,-70.5 -54.5))"], "date_created": "Sat, 01 Jan 2011 00:00:00 GMT", "description": "Polar oceans are the main sites of deep-water formation and are critical to the exchange of heat and carbon between the deep ocean and the atmosphere. This award \"Historic perspectives on climate and biogeography from deep-sea corals in the Drake Passage\" will address the following specific research questions: What was the radiocarbon content of the Southern Ocean during the last glacial maximum and during past rapid climate change events? and What are the major controls on the past and present distribution of cold-water corals within the Drake Passage and adjacent continental shelves? Testing these overall questions will allow the researchers to better understand how processes in the Southern Ocean are linked to climate change over millennia. This award is being funded by the Antarctic Earth Sciences Program of NSF\u0027s Office of Polar Programs, Antarctic Division. INTELLECTUAL MERIT: The skeletons of deep-sea corals are abundant in the Southern Ocean, and can be dated using U-series techniques making them a useful archive of oceanographic history. By pairing U-series and radiocarbon analyses the awardees can reconstruct the radiocarbon content of seawater in the past, allowing them to address the research questions raised above. Collection of living deep-sea corals along with environmental data will allow them to address the broader biogeography questions posed above as well. The awardees are uniquely qualified to answer these questions in their respective labs via cutting edge technologies, and they have shown promising results from a preliminary pilot cruise to the area in 2008. BROADER IMPACTS: Societal Relevance: The proposed paleoclimate research will make significant advances toward constraining the Southern Ocean\u0027s influence on global climate, specifically it should help set the bounds for the upper limits on how fast the ocean circulation might change in this region of the world, which is of high societal relevance in this era of changing climate. Education and Outreach (E/O): These activities are grouped into four categories: i) increasing student participation in polar research by fully integrating undergraduate through post-doctoral students into research programs; ii) promotion of K-12 teaching and learning programs by providing information via a cruise website and in-school talks, iii) making the data collected available to the wider research community via data archives such as Seamounts Online and the Seamount Biogeographic Network and iv) reaching a larger public audience through such venues as interviews in the popular media.", "east": -35.0, "geometry": ["POINT(-52.75 -58)"], "keywords": "Biota; Corals; Cruise Report; Drake Passage; NBP1103; Oceans; Sample/collection Description; Sample/Collection Description; Southern Ocean", "locations": "Drake Passage; Southern Ocean", "north": -54.5, "nsf_funding_programs": null, "persons": "Robinson, Laura", "project_titles": "Collaborative Research: Historic Perspectives on Climate and Biogeography from Deep-sea Corals in the Drake Passage", "projects": [{"proj_uid": "p0000514", "repository": "USAP-DC", "title": "Collaborative Research: Historic Perspectives on Climate and Biogeography from Deep-sea Corals in the Drake Passage"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -61.5, "title": "Historic Perspectives on Climate and Biogeography from Deep-Sea Corals in the Drake Passage", "uid": "600114", "west": -70.5}, {"awards": "0538520 Thiemens, Mark", "bounds_geometry": ["POINT(-114.216667 -78.916667)"], "date_created": "Mon, 01 Nov 2010 00:00:00 GMT", "description": "This data set contains measurements of multiple sulfur and oxygen isotopes from sulfates, from an ice core drilled at the West Antarctic Ice Sheet (WAIS) Divide site in 2005. The initial sulfate measurements, analyzed in 2008 from the 70 meter WAIS 2005A core, are 12 meter averages and span the pre-industrial to industrial transition, from the late 1700s to 2005. This data set is part of the West Antarctic Ice Sheet Divide Ice Core (WAISCORES) project.\n\nData are available via FTP in Microsoft Excel (.xlsx) format.", "east": -114.216667, "geometry": ["POINT(-114.216667 -78.916667)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Paleoclimate; WAIS Divide; WAIS Divide Ice Core", "locations": "WAIS Divide; Antarctica", "north": -78.916667, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Thiemens, Mark H.", "project_titles": "Collaborative Research: Multiple-isotope Analysis of Nitrate and Sulfate in the West Antarctic Ice Sheet Divide Ice Core", "projects": [{"proj_uid": "p0000020", "repository": "USAP-DC", "title": "Collaborative Research: Multiple-isotope Analysis of Nitrate and Sulfate in the West Antarctic Ice Sheet Divide Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.916667, "title": "Multiple Isotope Analysis of Sulfate in the West Antarctic Ice Sheet Divide Ice Core", "uid": "609479", "west": -114.216667}, {"awards": "0337567 Jacobel, Robert", "bounds_geometry": ["POLYGON((130 -78,133 -78,136 -78,139 -78,142 -78,145 -78,148 -78,151 -78,154 -78,157 -78,160 -78,160 -79.2,160 -80.4,160 -81.6,160 -82.8,160 -84,160 -85.2,160 -86.4,160 -87.6,160 -88.8,160 -90,157 -90,154 -90,151 -90,148 -90,145 -90,142 -90,139 -90,136 -90,133 -90,130 -90,130 -88.8,130 -87.6,130 -86.4,130 -85.2,130 -84,130 -82.8,130 -81.6,130 -80.4,130 -79.2,130 -78))"], "date_created": "Wed, 20 Oct 2010 00:00:00 GMT", "description": "This data set contains ice penetrating radar data from the US-International Trans-Antarctic Science Expedition (ITASE) Traverse, from Taylor Dome to South Pole recorded by the St. Olaf College deep radar system. Parameters include latitude, longitude, distance along profile (m), ice thickness pick (m), surface elevation (m), and bed echo power (relative units) from the approximately 1800 km traverse recorded during the 2006-2007 and 2007-2008 Antarctic field seasons (austral summer). The traverse has been broken into three segments, which are shown on three maps provided with the data. A sample radar profile covering approximately 120 km of the traverse near Titan Dome is also provided.\n\nData are available via FTP as ASCII text files (.txt). Profile location maps and sample profile sections are available as Joint Photographic Experts Group (.jpg) image files.", "east": 160.0, "geometry": ["POINT(145 -84)"], "keywords": "Antarctica; Elevation; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Thickness; ITASE; South Pole; Taylor Dome", "locations": "Taylor Dome; South Pole; Antarctica", "north": -78.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Jacobel, Robert", "project_titles": "Collaborative Research: Is Ice Stream C Restarting? Glaciological Investigations of the \u0027Bulge\u0027 and the Trunk of Ice Stream C, West Antartica", "projects": [{"proj_uid": "p0000192", "repository": "USAP-DC", "title": "Collaborative Research: Is Ice Stream C Restarting? Glaciological Investigations of the \u0027Bulge\u0027 and the Trunk of Ice Stream C, West Antartica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "ITASE", "south": -90.0, "title": "Radar Studies of Internal Stratigraphy and Bed Topography along the US ITASE-II Traverse", "uid": "609475", "west": 130.0}, {"awards": "0636506 Mayewski, Paul", "bounds_geometry": ["POLYGON((-137.7 -75.7,-137.4 -75.7,-137.1 -75.7,-136.8 -75.7,-136.5 -75.7,-136.2 -75.7,-135.9 -75.7,-135.6 -75.7,-135.3 -75.7,-135 -75.7,-134.7 -75.7,-134.7 -75.773,-134.7 -75.846,-134.7 -75.919,-134.7 -75.992,-134.7 -76.065,-134.7 -76.138,-134.7 -76.211,-134.7 -76.284,-134.7 -76.357,-134.7 -76.43,-135 -76.43,-135.3 -76.43,-135.6 -76.43,-135.9 -76.43,-136.2 -76.43,-136.5 -76.43,-136.8 -76.43,-137.1 -76.43,-137.4 -76.43,-137.7 -76.43,-137.7 -76.357,-137.7 -76.284,-137.7 -76.211,-137.7 -76.138,-137.7 -76.065,-137.7 -75.992,-137.7 -75.919,-137.7 -75.846,-137.7 -75.773,-137.7 -75.7))"], "date_created": "Thu, 29 Jul 2010 00:00:00 GMT", "description": "This data set contains measurments from co-registered samples from a horizontal trench in the Mt. Moulton Blue Ice Area (BIA) in Antarctica. All 3795 co-registered samples were analyzed for their soluble major anion content by Ion Chromatography (IC) and for trace elements by inductively coupled plasma sector field mass spectrometry . \n\nThe data are available via FTP in Microsoft Excel format (.xls) and Microsoft Word document (.doc).", "east": -134.7, "geometry": ["POINT(-136.2 -76.065)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Mt Moulton; Paleoclimate", "locations": "Antarctica; Mt Moulton", "north": -75.7, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Mayewski, Paul A.; Korotkikh, Elena", "project_titles": "Collaborative Proposal: 2000+ Year Detailed, Calibrated Climate Reconstruction from a South Pole Ice Core Set in an Antarctic - Global Scale Context", "projects": [{"proj_uid": "p0000209", "repository": "USAP-DC", "title": "Collaborative Proposal: 2000+ Year Detailed, Calibrated Climate Reconstruction from a South Pole Ice Core Set in an Antarctic - Global Scale Context"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -76.43, "title": "Mt. Moulton Ice Trench Mass Spectrometry Data, Antarctica", "uid": "609472", "west": -137.7}, {"awards": "0636506 Mayewski, Paul", "bounds_geometry": ["POINT(-144.39 -89.93)"], "date_created": "Thu, 01 Jul 2010 00:00:00 GMT", "description": "This data set contains ion measurements from co-registered samples from the South Pole Remote Earth Science and Seismological Observatory (SPRESSO) ice core. The core was drilled during the 2002-2003 field season as part of the International Trans-Antarctic Science Expedition (ITASE). Samples were collected for ion chromatography, inductively coupled plasma sector field mass spectrometry and stable water isotope analysis. Parameters include measurements of ion concentrations in ice core samples.\n\nThe data are available via FTP in Microsoft Excel format (.xls).", "east": -144.39, "geometry": ["POINT(-144.39 -89.93)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; ITASE; Paleoclimate; South Pole; SPRESSO Ice Core", "locations": "South Pole; Antarctica", "north": -89.93, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Mayewski, Paul A.; Korotkikh, Elena", "project_titles": "Collaborative Proposal: 2000+ Year Detailed, Calibrated Climate Reconstruction from a South Pole Ice Core Set in an Antarctic - Global Scale Context", "projects": [{"proj_uid": "p0000209", "repository": "USAP-DC", "title": "Collaborative Proposal: 2000+ Year Detailed, Calibrated Climate Reconstruction from a South Pole Ice Core Set in an Antarctic - Global Scale Context"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -89.93, "title": "Ion Concentrations from SPRESSO Ice Core, Antarctica", "uid": "609471", "west": -144.39}, {"awards": "0440666 Waddington, Edwin", "bounds_geometry": ["POINT(-111.816667 -79.416667)", "POINT(158.716667 -77.783333)"], "date_created": "Sun, 20 Jun 2010 00:00:00 GMT", "description": "This data set contains radar internal layer and ice sheet topography data for two sites in Antarctica, along with associated model results from two studies. This project used geophysical inverse theory and a 2.5 D flowband ice-flow forward model to extract robust transient accumulation patterns from multiple deeper layers. Histories of divide migration, or the movement of the ice sheet and ice-surface evolution are also provided. The data used to solve the inverse problem, and the model solutions are provided. Internal layers, modern ice-surface velocities, and modern ice-sheet geometry at Taylor Mouth are available, as well as the pattern of accumulation inferred by Waddington et al. (2007).\n\nData are available via FTP in Matlab (.mat) format. Supporting information is available as text files (.rtf and .txt).", "east": 158.716667, "geometry": ["POINT(-111.816667 -79.416667)", "POINT(158.716667 -77.783333)"], "keywords": "Antarctica; Elevation; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; WAIS Divide; WAIS Divide Ice Core", "locations": "Antarctica; WAIS Divide", "north": -77.783333, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Waddington, Edwin D.; Koutnik, Michelle", "project_titles": "Histories of accumulation, thickness and WAIS Divide location from radar layers using a new inverse approach", "projects": [{"proj_uid": "p0000018", "repository": "USAP-DC", "title": "Histories of accumulation, thickness and WAIS Divide location from radar layers using a new inverse approach"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.416667, "title": "Histories of Accumulation, Thickness, and WAIS Divide Location, Antarctica", "uid": "609473", "west": -111.816667}, {"awards": "0338151 Raymond, Charles", "bounds_geometry": ["POINT(-112.09 -79.47)"], "date_created": "Tue, 15 Jun 2010 00:00:00 GMT", "description": "This data set contains the results of a model study of spatial variations of ice temperature and subglacial conditions using available ice-penetrating radar data around a future deep ice coring site near the Ross and Amundsen flow divide of West Antarctic Ice Sheet. The model data are based on radar data collected by the Support Office of Aerogeophysical Research (SOAR) at the University of Texas, and the University of Washington, in 2000. The data include values for attenuation estimates for individual radar profiles.\n\nData are available via FTP in MATLAB (.mat) and Portable Document (.pdf) formats.", "east": -112.09, "geometry": ["POINT(-112.09 -79.47)"], "keywords": "Airborne Radar; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Radar; WAIS Divide", "locations": "WAIS Divide; Antarctica", "north": -79.47, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Raymond, Charles; Matsuoka, Kenichi", "project_titles": "Glaciological Characteristics of the Ross/Amundsen Sea Ice-flow Divide Deduced by a New Analysis of Ice-penetrating Radar Data", "projects": [{"proj_uid": "p0000017", "repository": "USAP-DC", "title": "Glaciological Characteristics of the Ross/Amundsen Sea Ice-flow Divide Deduced by a New Analysis of Ice-penetrating Radar Data"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.47, "title": "Englacial Layers and Attenuation Rates across the Ross and Amundsen Sea Ice-Flow Divide (WAIS Divide), West Antarctica", "uid": "609470", "west": -112.09}, {"awards": "0335330 Waddington, Edwin", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Tue, 15 Jun 2010 00:00:00 GMT", "description": "This data set consists of scripts and code designed for modeling the properties of boreholes in polar ice sheets, under a range of variations in the borehole geometry, firn layering, and camera pointing and position. The data set contains two folders. One includes two perl scripts and a piece of C code, along with directions for setting up and running a Monte Carlo model of photons traveling to and from a borehole in the firn. The second includes scripts for generating ray-tracing input files to be used with the POV-Ray package (a standard, free raytracing package) to generate simulated borehole video frames based on the results of the Monte Carlo model. The project was conducted between February 2005 and April 2010.\n\nThe codes to run the models are available via FTP, in Perlscript (.pl) and C code.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Modeling Code", "locations": null, "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Hawley, Robert L.; Smith, Ben; Waddington, Edwin D.; Fudge, T. J.", "project_titles": "Borehole Optical Stratigraphy: Ice Microphysics, Climate Change, and the Optical Properties of Firn", "projects": [{"proj_uid": "p0000016", "repository": "USAP-DC", "title": "Borehole Optical Stratigraphy: Ice Microphysics, Climate Change, and the Optical Properties of Firn"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Borehole Optical Stratigraphy Modeling, Antarctica", "uid": "609468", "west": -180.0}, {"awards": "0739372 Conway, Howard", "bounds_geometry": ["POLYGON((-123 -76,-120.65 -76,-118.3 -76,-115.95 -76,-113.6 -76,-111.25 -76,-108.9 -76,-106.55 -76,-104.2 -76,-101.85 -76,-99.5 -76,-99.5 -76.37,-99.5 -76.74,-99.5 -77.11,-99.5 -77.48,-99.5 -77.85,-99.5 -78.22,-99.5 -78.59,-99.5 -78.96,-99.5 -79.33,-99.5 -79.7,-101.85 -79.7,-104.2 -79.7,-106.55 -79.7,-108.9 -79.7,-111.25 -79.7,-113.6 -79.7,-115.95 -79.7,-118.3 -79.7,-120.65 -79.7,-123 -79.7,-123 -79.33,-123 -78.96,-123 -78.59,-123 -78.22,-123 -77.85,-123 -77.48,-123 -77.11,-123 -76.74,-123 -76.37,-123 -76))"], "date_created": "Sat, 01 May 2010 00:00:00 GMT", "description": "This data set contains past flow lines of Thwaites Glacier. The flow lines were identified using layer patterns tracked between parallel radar layers, from a radar profile of the Thwaites Glacier catchment. The radar data was run and processed by the University of Texas Institute for Geophysics. The flow lines were identified from distinct layer patterns tracked between parallel radar layers. \n\nData are available via FTP in ASCII text (.txt) format.", "east": -99.5, "geometry": ["POINT(-111.25 -77.85)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Flow Lines; Thwaites Glacier", "locations": "Thwaites Glacier; Antarctica", "north": -76.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Conway, Howard; Fudge, T. J.; Catania, Ginny", "project_titles": "Collaborative Research: Ice-flow history of the Thwaites Glacier, West Antarctica", "projects": [{"proj_uid": "p0000143", "repository": "USAP-DC", "title": "Collaborative Research: Ice-flow history of the Thwaites Glacier, West Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.7, "title": "Ice Flow History of the Thwaites Glacier, West Antarctica", "uid": "609463", "west": -123.0}, {"awards": "0440523 Baker, Ian; 0538195 Marone, Chris; 0424589 Gogineni, S. Prasad", "bounds_geometry": ["POINT(-147.753056 61.781667)", "POINT(-83.006944 40.067222)", "POINT(147.758889 61.779444)"], "date_created": "Wed, 14 Apr 2010 00:00:00 GMT", "description": "This data set includes the results of laboratory experiments examining the constitutive properties of subglacial till, under dynamic stressing. The data include the results of shear strain and stress experiments. Testing was carried out in a servo-controlled biaxial shear device under controlled temperature and stress conditions, allowing both sliding and microstructural processes to be studied in detail. Till samples were collected from Matanuska, Alaska and from Caesar till at the Laurentide Ice Sheet. \n\nThe data are available via FTP in ASCII text format (.txt).", "east": 147.758889, "geometry": ["POINT(-147.753056 61.781667)", "POINT(-83.006944 40.067222)", "POINT(147.758889 61.779444)"], "keywords": "Geology/Geophysics - Other; Glaciers/ice Sheet; Glaciers/Ice Sheet; Shear Stress; Solid Earth; Strain", "locations": null, "north": 61.781667, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Marone, Chris; Anandakrishnan, Sridhar", "project_titles": "Laboratory Study of Stick-Slip Behavior and Deformation Mechanics of Subglacial Till", "projects": [{"proj_uid": "p0000554", "repository": "USAP-DC", "title": "Laboratory Study of Stick-Slip Behavior and Deformation Mechanics of Subglacial Till"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": 40.067222, "title": "Laboratory Study of Stick-Slip Behavior and Deformation Mechanics of Subglacial Till", "uid": "609460", "west": -147.753056}, {"awards": "9980379 Baker, Ian; 0440523 Baker, Ian", "bounds_geometry": ["POINT(-119.516667 -80.016667)", "POINT(-38.466667 72.583333)", "POINT(106.8 -72.466667)"], "date_created": "Mon, 15 Feb 2010 00:00:00 GMT", "description": "This data set contains measurements of impurities and ions in three polar ice cores: the Vostok 5G ice core and the Byrd ice core from Antarctica, and the Greenland Ice Sheet Project 2 (GISP2) D core. Parameters include sample depth, grain size, ion concentration, and ice core impurity information. Measurements were made using Ion Chromatography (IC), optical microscopy, and Scanning Electron Microscope-Energy Dispersive Spectroscopy (SEM/EDS). \n\nData are available via FTP in Microsoft Excel (.xls)and Microsoft Word (.doc) formats.", "east": 106.8, "geometry": ["POINT(-119.516667 -80.016667)", "POINT(-38.466667 72.583333)", "POINT(106.8 -72.466667)"], "keywords": "Antarctica; Arctic; Byrd Glacier; Byrd Ice Core; Chemistry:ice; Chemistry:Ice; Geochemistry; GISP2; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Lake Vostok; Paleoclimate; Vostok Ice Core", "locations": "Lake Vostok; Byrd Glacier; Arctic; Antarctica", "north": 72.583333, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Baker, Ian; Obbard, Rachel", "project_titles": "The Physical Properties of the US ITASE Firn and Ice Cores from South Pole to Taylor Dome", "projects": [{"proj_uid": "p0000289", "repository": "USAP-DC", "title": "The Physical Properties of the US ITASE Firn and Ice Cores from South Pole to Taylor Dome"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.016667, "title": "Microstructural Location and Composition of Impurities in Polar Ice Cores", "uid": "609436", "west": -119.516667}, {"awards": "0440817 Taylor, Kendrick; 0230149 McGwire, Kenneth; 0637004 McGwire, Kenneth", "bounds_geometry": ["POINT(-112.083333 -79.466667)"], "date_created": "Wed, 10 Feb 2010 00:00:00 GMT", "description": "This data set is comprised of optical images of ice core sections, acquired with a digital line-scan camera in the cold room facility at the U.S. National Ice Core Laboratory (NICL). Ice core sections are archival cuts which have rough-out rounds of ice with a single plane cut along one side. Ice sections were illuminated with fiber optic light guides connected to a 1000 watt (W) xenon light source. Original scan resolution varies from about 0.05 mm to 0.1 mm, and is documented in the metadata for each image. Images are in uncompressed Tagged Image File (.tif) form, with resolutions of 1.0 mm and 0.1 mm. Depth of image in the ice core is documented in the metadata files for each image.\n\nData are available via FTP as .tif image files. Supporting information is available as ASCII text files (.txt), and other file formats readable with a freely available image processing program, IceImageJ.", "east": -112.083333, "geometry": ["POINT(-112.083333 -79.466667)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Optical Images; Paleoclimate; WAIS Divide; WAIS Divide Ice Core", "locations": "WAIS Divide; Antarctica", "north": -79.466667, "nsf_funding_programs": "Antarctic Glaciology", "persons": "McGwire, Kenneth C.", "project_titles": "Investigation of Climate, Ice Dynamics and Biology using a Deep Ice Core from the West Antarctic Ice Sheet Ice Divide", "projects": [{"proj_uid": "p0000182", "repository": "USAP-DC", "title": "Investigation of Climate, Ice Dynamics and Biology using a Deep Ice Core from the West Antarctic Ice Sheet Ice Divide"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.466667, "title": "WAIS Divide Ice Core Images, Antarctica", "uid": "609375", "west": -112.083333}, {"awards": "0636543 Murray, Alison", "bounds_geometry": ["POLYGON((-51.98403 -57.58068,-51.042765 -57.58068,-50.1015 -57.58068,-49.160235 -57.58068,-48.21897 -57.58068,-47.277705 -57.58068,-46.33644 -57.58068,-45.395175 -57.58068,-44.45391 -57.58068,-43.512645 -57.58068,-42.57138 -57.58068,-42.57138 -58.10845,-42.57138 -58.63622,-42.57138 -59.16399,-42.57138 -59.69176,-42.57138 -60.21953,-42.57138 -60.7473,-42.57138 -61.27507,-42.57138 -61.80284,-42.57138 -62.33061,-42.57138 -62.85838,-43.512645 -62.85838,-44.45391 -62.85838,-45.395175 -62.85838,-46.33644 -62.85838,-47.277705 -62.85838,-48.21897 -62.85838,-49.160235 -62.85838,-50.1015 -62.85838,-51.042765 -62.85838,-51.98403 -62.85838,-51.98403 -62.33061,-51.98403 -61.80284,-51.98403 -61.27507,-51.98403 -60.7473,-51.98403 -60.21953,-51.98403 -59.69176,-51.98403 -59.16399,-51.98403 -58.63622,-51.98403 -58.10845,-51.98403 -57.58068))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "Atmospheric warming has been associated with retreating glaciers, disintegrating ice shelves, and the increasing prevalence of icebergs in the Southern Ocean over the last decade. Our preliminary study of two icebergs in the NW Weddell Sea, an area of high iceberg concentration, showed significant delivery of terrestrial material accompanied by significant enhancement of phytoplankton and zooplankton/micronekton abundance, and primary production surrounding the icebergs. We hypothesize that nutrient enrichment by free-drifting icebergs will increase primary production and sedimentation of organic carbon, thus increasing the draw-down and sequestration of CO2 in the Southern Ocean and impacting the global carbon cycle. Our research addresses the following questions: 1) What is the relationship between the physical dynamics of free-drifting icebergs and the Fe and nutrient distributions of the surrounding water column? 2) What is the relationship between Fe and nutrient distributions associated with free-drifting icebergs and the organic carbon dynamics of the ice-attached and surrounding pelagic communities (microbes, zooplankton, micronekton)? 3) What is impact on the export flux of particulate organic carbon from the mixed layer? An interdisciplinary approach is proposed to examine iceberg structure and dynamics, biogeochemical processes, and carbon cycling that includes measurement of trace element, nutrient and radionuclide distributions; organic carbon dynamics mediated by microbial, ice-attached and zooplankton communities; and particulate organic carbon export fluxes. Results from this project will further our understanding of the relationship between climate change and carbon sequestration in the Southern Ocean. Our findings will be incorporated into the Antarctic Research division of the Ocean Exploration Center (OEC) as part of the SIOExplorer: Digital Library Project. The OEC allows users to access content, which is classified to one of four levels: entry (grade K-6), student (grade 6-12), college, and research. Graduate students, undergraduates, teachers, and volunteers are important participants in the proposed field and laboratory work. For the K-12 level, a professional writer of children\u0027s books will participate in cruises to produce an account of the expedition and a daily interactive website.", "east": -42.57138, "geometry": ["POINT(-47.277705 -60.21953)"], "keywords": "Biota; Geochemistry; NBP0902; Oceans; Physical Oceanography; Sea Ice; Southern Ocean; Weddell Sea", "locations": "Southern Ocean; Weddell Sea", "north": -57.58068, "nsf_funding_programs": null, "persons": "Murray, Alison", "project_titles": "Collaborative Research: Free Drifting Icebergs as Proliferation Sites of Iron Enrichment, Organic Carbon Production and Export in the Southern Ocean", "projects": [{"proj_uid": "p0000511", "repository": "USAP-DC", "title": "Collaborative Research: Free Drifting Icebergs as Proliferation Sites of Iron Enrichment, Organic Carbon Production and Export in the Southern Ocean"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -62.85838, "title": "Free-Drifting Icebergs as Proliferating Dispersion Sites of Iron Enrichment, Organic Carbon Production and Export in the Southern Ocean", "uid": "600065", "west": -51.98403}, {"awards": "0634619 Hammer, William", "bounds_geometry": ["POINT(166 -84)"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "This award supports preparation and study of fossil dinosaurs discovered on Mt. Kirkpatrick, Antarctica, during the 2003-04 field season. The 4,000 pounds of bone bearing matrix to be processed includes new pieces of Cryolophosaurus, a 22 foot long meat eating theropod, as well as a new unnamed sauropod dinosaur and other yet to be identified taxa. This project advances our understanding of dinosaur evolution and adaptation at the beginning of the reign of the dinosaurs, the Late Triassic and Early Jurassic. This period is poorly understood due to lack of fossils, which makes these fossils from Antarctica particularly unique. Also, since these fossils are from high paleolatitudes they will contribute to our understanding of past climates and the physiologic adaptations of dinosaurs to lengthy periods of darkness. The broader impacts include outreach to the general public through museum exhibits and presentations.", "east": 166.0, "geometry": ["POINT(166 -84)"], "keywords": "Antarctica; Beardmore Glacier; Biota; Geochronology; Solid Earth", "locations": "Antarctica; Beardmore Glacier", "north": -84.0, "nsf_funding_programs": null, "persons": "Hammer, William R.", "project_titles": "Continued Research on the Jurassic Vertebrate Fauna from the Beardmore Glacier Region of Antarctica", "projects": [{"proj_uid": "p0000538", "repository": "USAP-DC", "title": "Continued Research on the Jurassic Vertebrate Fauna from the Beardmore Glacier Region of Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -84.0, "title": "Continued Research on the Jurassic Vertebrate Fauna from the Beardmore Glacier Region of Antarctica", "uid": "600062", "west": 166.0}, {"awards": "0538580 Hemming, Sidney", "bounds_geometry": ["POLYGON((60 -60,72 -60,84 -60,96 -60,108 -60,120 -60,132 -60,144 -60,156 -60,168 -60,180 -60,180 -61,180 -62,180 -63,180 -64,180 -65,180 -66,180 -67,180 -68,180 -69,180 -70,168 -70,156 -70,144 -70,132 -70,120 -70,108 -70,96 -70,84 -70,72 -70,60 -70,60 -69,60 -68,60 -67,60 -66,60 -65,60 -64,60 -63,60 -62,60 -61,60 -60))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "This project studies sediment from the ocean floor to understand Antarctica\u0027s geologic history. Glacially eroded from the Antarctic continent, these sediments may offer insight into the 99% Antarctica covered by ice. The work\u0027s central focus is determining crust formation ages and thermal histories for three key areas of East Antarctica--Prydz Bay, eastern Weddell Sea, and Wilkes Land--through a combination of petrography, bulk sediment geochemistry and radiogenic isotopes, as well as isotope chronology of individual mineral grains. One specific objective is characterizing the composition of the Gamburtsev Mountains through studies of Eocene fluvial sediments from Prydz Bay. In addition to furthering our understanding of the hidden terrains of Antarctica, these terrigenous sediments will also serve as a natural laboratory to evaluate the effects of continental weathering on the Hf/Nd isotope systematics of seawater. An important broader impact of the project is providing exciting research projects for graduate and postdoctoral students using state of the art techniques in geochemistry.", "east": 180.0, "geometry": ["POINT(120 -65)"], "keywords": "Antarctica; Chemistry:sediment; Chemistry:Sediment; Geochemistry; Geochronology; Isotope Data; Marine Sediments; Oceans; Prydz Bay; Solid Earth; Southern Ocean; Weddell Sea; Wilkes Land", "locations": "Prydz Bay; Weddell Sea; Southern Ocean; Antarctica; Wilkes Land", "north": -60.0, "nsf_funding_programs": null, "persons": "van de Flierdt, Tina; Goldstein, Steven L.; Hemming, Sidney R.", "project_titles": "Antarctica\u0027s Geological History Reflected in Sedimentary Radiogenic Isotopes", "projects": [{"proj_uid": "p0000524", "repository": "USAP-DC", "title": "Antarctica\u0027s Geological History Reflected in Sedimentary Radiogenic Isotopes"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -70.0, "title": "Antarctica\u0027s Geological History Reflected in Sedimentary Radiogenic Isotopes", "uid": "600056", "west": 60.0}, {"awards": "0538479 Seibel, Brad", "bounds_geometry": ["POLYGON((166 -77,166.1 -77,166.2 -77,166.3 -77,166.4 -77,166.5 -77,166.6 -77,166.7 -77,166.8 -77,166.9 -77,167 -77,167 -77.1,167 -77.2,167 -77.3,167 -77.4,167 -77.5,167 -77.6,167 -77.7,167 -77.8,167 -77.9,167 -78,166.9 -78,166.8 -78,166.7 -78,166.6 -78,166.5 -78,166.4 -78,166.3 -78,166.2 -78,166.1 -78,166 -78,166 -77.9,166 -77.8,166 -77.7,166 -77.6,166 -77.5,166 -77.4,166 -77.3,166 -77.2,166 -77.1,166 -77))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "Rising atmospheric carbon dioxide concentrations have resulted in greater oceanic uptake of anthropogenic carbon dioxide. Elevated partial pressure of carbon dioxide can impact marine organisms both via decreased carbonate saturation that affects calcification rates and via disturbance to acid-base (metabolic) physiology. Pteropod molluscs (Thecosomata) form shells made of aragonite, a type of calcium carbonate that is highly soluble, suggesting that these organisms may be particularly sensitive to increasing carbon dioxide and reduced carbonate ion concentration. Thecosome pteropods, which dominate the calcium carbonate export south of the Antarctic Polar Front, will be the first major group of marine calcifying organisms to experience carbonate undersaturation within parts of their present-day geographical ranges as a result of anthropogenic carbon dioxide. An unusual, co-evolved relationship between thecosomes and their specialized gymnosome predators provides a unique backdrop against which to assess the physiological and ecological importance of elevated partial pressure of carbon dioxide. Pteropods are functionally important components of the Antarctic ecosystem with potential to influence phytoplankton stocks, carbon export, and dimethyl sulfide levels that, in turn, influence global climate through ocean-atmosphere feedback loops. The research will quantify the impact of elevated carbon dioxide on a dominant aragonitic pteropod, Limacina helicina, and its specialist predator, the gymnosome Clione antarctica, in the Ross Sea through laboratory experimentation. Results will be disseminated broadly to enhance scientific understanding in this field. The project involves collaboration between researchers at a predominantly undergraduate institution with a significant enrollment of students that are typically underrepresented in the research environment (California State University San Marcos - CSUSM) and at a Ph.D.-granting institution (University of Rhode Island - URI). The program will promote education and learning through the joint education of undergraduate students and graduate students at CSUSM and URI as part of a research team, as well as through the teaching activities of the principal investigators. Dr. Keating, CSUSM professor of science education, will participate in the McMurdo fieldwork and lead the outreach opportunities for the project.", "east": 167.0, "geometry": ["POINT(166.5 -77.5)"], "keywords": "Biota; CO2; Mcmurdo Station; Oceans; Ross Island; Sample/collection Description; Sample/Collection Description; Shell Fish; Southern Ocean", "locations": "Southern Ocean; Ross Island", "north": -77.0, "nsf_funding_programs": null, "persons": "Seibel, Brad", "project_titles": "Collaborative Research: Impacts of Elevated pCO2 on a Dominant Aragonitic Pteropod (Thecosomata) and its Specialist Predator (Gymnosomata) in the Ross Sea", "projects": [{"proj_uid": "p0000694", "repository": "USAP-DC", "title": "Collaborative Research: Impacts of Elevated pCO2 on a Dominant Aragonitic Pteropod (Thecosomata) and its Specialist Predator (Gymnosomata) in the Ross Sea"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Impacts of Elevated pCO2 on a Dominant Aragonitic Pteropod (Thecosomata) and its Specialist Predator (Gymnosomata) in the Ross Sea", "uid": "600055", "west": 166.0}, {"awards": "0338163 Leventer, Amy", "bounds_geometry": ["POLYGON((-70.90391 -52.35262,-68.130917 -52.35262,-65.357924 -52.35262,-62.584931 -52.35262,-59.811938 -52.35262,-57.038945 -52.35262,-54.265952 -52.35262,-51.492959 -52.35262,-48.719966 -52.35262,-45.946973 -52.35262,-43.17398 -52.35262,-43.17398 -53.75776,-43.17398 -55.1629,-43.17398 -56.56804,-43.17398 -57.97318,-43.17398 -59.37832,-43.17398 -60.78346,-43.17398 -62.1886,-43.17398 -63.59374,-43.17398 -64.99888,-43.17398 -66.40402,-45.946973 -66.40402,-48.719966 -66.40402,-51.492959 -66.40402,-54.265952 -66.40402,-57.038945 -66.40402,-59.811938 -66.40402,-62.584931 -66.40402,-65.357924 -66.40402,-68.130917 -66.40402,-70.90391 -66.40402,-70.90391 -64.99888,-70.90391 -63.59374,-70.90391 -62.1886,-70.90391 -60.78346,-70.90391 -59.37832,-70.90391 -57.97318,-70.90391 -56.56804,-70.90391 -55.1629,-70.90391 -53.75776,-70.90391 -52.35262))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "The NSF-supported research icebreaker Nathaniel B. Palmer operates year-round in support of the U.S. Antarctic Program, carrying out global change studies in biological, chemical, physical, and oceanographic disciplines. \n This data set consists of underway data from leg NBP0603 on the R/V Nathaniel B. Palmer. This leg started at Punta Arenas, Chile and ended at Punta Arenas, Chile.", "east": -43.17398, "geometry": ["POINT(-57.038945 -59.37832)"], "keywords": "ADCP Acoustic Doppler Current Profiler; Antarctic Peninsula; Biota; Diatom; Electromagnetic Data; Flask Glacier; Foehn Winds; Larsen Ice Shelf; Marine Sediments; NBP0603; Oceans; Physical Ice Properties; R/v Nathaniel B. Palmer; Scar Inlet; Southern Ocean", "locations": "Antarctic Peninsula; Flask Glacier; Larsen Ice Shelf; Southern Ocean; Scar Inlet", "north": -52.35262, "nsf_funding_programs": null, "persons": "Domack, Eugene Walter", "project_titles": "Collaborative Research: Paleohistory of the Larsen Ice Shelf System: Phase II", "projects": [{"proj_uid": "p0000215", "repository": "USAP-DC", "title": "Collaborative Research: Paleohistory of the Larsen Ice Shelf System: Phase II"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -66.40402, "title": "R/V Nathaniel B. Palmer NBP0603 - Paleohistory of the Larsen Ice Shelf System", "uid": "600027", "west": -70.90391}, {"awards": "0442857 Baker, Bill", "bounds_geometry": ["POLYGON((-65 -63,-64.8 -63,-64.6 -63,-64.4 -63,-64.2 -63,-64 -63,-63.8 -63,-63.6 -63,-63.4 -63,-63.2 -63,-63 -63,-63 -63.2,-63 -63.4,-63 -63.6,-63 -63.8,-63 -64,-63 -64.2,-63 -64.4,-63 -64.6,-63 -64.8,-63 -65,-63.2 -65,-63.4 -65,-63.6 -65,-63.8 -65,-64 -65,-64.2 -65,-64.4 -65,-64.6 -65,-64.8 -65,-65 -65,-65 -64.8,-65 -64.6,-65 -64.4,-65 -64.2,-65 -64,-65 -63.8,-65 -63.6,-65 -63.4,-65 -63.2,-65 -63))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "Mesoherbivores, and specifically amphipods, are a conspicuous and dominant component of the macroalgal community in Antarctica. Despite their high abundance, the functional ecology, and particularly the trophic relationships of Antarctic amphipods are poorly understood. This project will evaluate the importance of mesograzers (small invertebrate predators approximately 1 to 25 mm in body length) in western Antarctic Peninsula marine communities. This will be accomplished by examining the role of mesoherbivores in structuring macroalgal communities and by elucidating the ecological interactions of mesograzers with a dominant group of benthic macroinvertebrates, the marine sponges. Moreover, chemical studies will be conducted to gain a more thorough understanding of the chemical defenses that Antarctic Peninsula sponges direct towards crustacean mesograzers. Three sets of questions will be addressed concerning the importance of mesograzers, and amphipods in particular, in nearshore habitats of the western Antarctic Peninsula. First, the hypothesis that mesoherbivory is particularly heavy in western Antarctic Peninsula marine communities and has an important influence on algal community structure will be addressed. Initial studies will document which species of amphipods feed in whole or part on microalgae and macroalgae, the incidence and distribution of filamentous endophytes in dominant macroalgae, comparative night time patterns of amphipod abundances on macrophytes, and the role of chemical mediation in these relationships. Second, the broad hypothesis that mesograzers in general, and amphipods in particular, interact with and prey upon sponges to a greater extent than heretofore recognized in Antarctic communities will be tested. The functional basis of these associations will be considered by examining whether the sponges are used as prey, and if so, whether there is evidence that some sponges produce secondary metabolites that show efficacy against mesograzers such as amphipods. Third, the researchers will test the hypotheses that: 1) Antarctic algae and invertebrates biosynthesize secondary metabolites that deter feeding by amphipod predators; and 2) pigments found in three Antarctic sponges are tryptophan catabolites produced as defenses against crustacean predators that impact molting. Evaluation of these hypotheses will be based on isolation and characterization of the specific anti-feeding metabolites, on biosynthetic studies to establish the metabolic origin of the pigments, and on bioassays to establish the chemical defense roles of both groups of compounds. A variety of educational activities will be a major component of this project. Opportunities will be made to support graduate and undergraduate research, both through NSF programs as well as home university-based programs including a number of funded programs that enhance the representation of minorities in the sciences. Through their proven and highly successful interactive web program, the investigators will continue to involve a large numbers of teachers, K-12 students, and other members of the community at large in their scientific endeavors in Antarctica. Moreover, they will actively participate in outreach efforts by presenting numerous talks on their research to school and community groups.", "east": -63.0, "geometry": ["POINT(-64 -64)"], "keywords": "Antarctica; Biota; Oceans; Southern Ocean", "locations": "Antarctica; Southern Ocean", "north": -63.0, "nsf_funding_programs": null, "persons": "Baker, Bill", "project_titles": "Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula; Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula - continuing", "projects": [{"proj_uid": "p0010016", "repository": "USAP-DC", "title": "Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula - continuing"}, {"proj_uid": "p0000475", "repository": "USAP-DC", "title": "Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.0, "title": "The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula", "uid": "600047", "west": -65.0}, {"awards": "0442769 McClintock, James", "bounds_geometry": ["POLYGON((-64.15 -64.78,-64.132 -64.78,-64.114 -64.78,-64.096 -64.78,-64.078 -64.78,-64.06 -64.78,-64.042 -64.78,-64.024 -64.78,-64.006 -64.78,-63.988 -64.78,-63.97 -64.78,-63.97 -64.784,-63.97 -64.788,-63.97 -64.792,-63.97 -64.796,-63.97 -64.8,-63.97 -64.804,-63.97 -64.808,-63.97 -64.812,-63.97 -64.816,-63.97 -64.82,-63.988 -64.82,-64.006 -64.82,-64.024 -64.82,-64.042 -64.82,-64.06 -64.82,-64.078 -64.82,-64.096 -64.82,-64.114 -64.82,-64.132 -64.82,-64.15 -64.82,-64.15 -64.816,-64.15 -64.812,-64.15 -64.808,-64.15 -64.804,-64.15 -64.8,-64.15 -64.796,-64.15 -64.792,-64.15 -64.788,-64.15 -64.784,-64.15 -64.78))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "Mesoherbivores, and specifically amphipods, are a conspicuous and dominant component of the macroalgal community in Antarctica. Despite their high abundance, the functional ecology, and particularly the trophic relationships of Antarctic amphipods are poorly understood. This project will evaluate the importance of mesograzers (small invertebrate predators approximately 1 to 25 mm in body length) in western Antarctic Peninsula marine communities. This will be accomplished by examining the role of mesoherbivores in structuring macroalgal communities and by elucidating the ecological interactions of mesograzers with a dominant group of benthic macroinvertebrates, the marine sponges. Moreover, chemical studies will be conducted to gain a more thorough understanding of the chemical defenses that Antarctic Peninsula sponges direct towards crustacean mesograzers. Three sets of questions will be addressed concerning the importance of mesograzers, and amphipods in particular, in nearshore habitats of the western Antarctic Peninsula. First, the hypothesis that mesoherbivory is particularly heavy in western Antarctic Peninsula marine communities and has an important influence on algal community structure will be addressed. Initial studies will document which species of amphipods feed in whole or part on microalgae and macroalgae, the incidence and distribution of filamentous endophytes in dominant macroalgae, comparative night time patterns of amphipod abundances on macrophytes, and the role of chemical mediation in these relationships. Second, the broad hypothesis that mesograzers in general, and amphipods in particular, interact with and prey upon sponges to a greater extent than heretofore recognized in Antarctic communities will be tested. The functional basis of these associations will be considered by examining whether the sponges are used as prey, and if so, whether there is evidence that some sponges produce secondary metabolites that show efficacy against mesograzers such as amphipods. Third, the researchers will test the hypotheses that: 1) Antarctic algae and invertebrates biosynthesize secondary metabolites that deter feeding by amphipod predators; and 2) pigments found in three Antarctic sponges are tryptophan catabolites produced as defenses against crustacean predators that impact molting. Evaluation of these hypotheses will be based on isolation and characterization of the specific anti-feeding metabolites, on biosynthetic studies to establish the metabolic origin of the pigments, and on bioassays to establish the chemical defense roles of both groups of compounds. A variety of educational activities will be a major component of this project. Opportunities will be made to support graduate and undergraduate research, both through NSF programs as well as home university-based programs including a number of funded programs that enhance the representation of minorities in the sciences. Through their proven and highly successful interactive web program, the investigators will continue to involve a large numbers of teachers, K-12 students, and other members of the community at large in their scientific endeavors in Antarctica. Moreover, they will actively participate in outreach efforts by presenting numerous talks on their research to school and community groups.", "east": -63.97, "geometry": ["POINT(-64.06 -64.8)"], "keywords": "Antarctica; Biota; Oceans; Southern Ocean", "locations": "Southern Ocean; Antarctica", "north": -64.78, "nsf_funding_programs": null, "persons": "McClintock, James; Amsler, Charles", "project_titles": "Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula; Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula - continuing", "projects": [{"proj_uid": "p0010016", "repository": "USAP-DC", "title": "Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula - continuing"}, {"proj_uid": "p0000475", "repository": "USAP-DC", "title": "Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.82, "title": "The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula", "uid": "600046", "west": -64.15}, {"awards": "0840398 Mende, Stephen", "bounds_geometry": ["POLYGON((-180 -75,-144 -75,-108 -75,-72 -75,-36 -75,0 -75,36 -75,72 -75,108 -75,144 -75,180 -75,180 -76.5,180 -78,180 -79.5,180 -81,180 -82.5,180 -84,180 -85.5,180 -87,180 -88.5,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -88.5,-180 -87,-180 -85.5,-180 -84,-180 -82.5,-180 -81,-180 -79.5,-180 -78,-180 -76.5,-180 -75))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). The PENGUIn team will continue investigating in depth a multi-scale electrodynamic system that comprises space environment of Planet Earth (geospace). Several science topics important to the space physics and aeronomy are outlines in this proposal that can be broadly categorized as the following objectives: (a) to study reconnection and waves in the southern cusp region; (b) to investigate unraveling global geomagnetic substorm signatures; (c) to understand the dayside wave-particle interactions; and (d) to observe and investigate various polar cap phenomena and neutral atmosphere dynamics. Cutting-edge science on these critical topics will be accomplished by acquiring multi-instrument data from a distributed network of autonomous observatories in Antarctica, built and deployed with the matured technological achievements. In the last several years, advances in power supply systems and Iridium data transmission for the Automatic Geophysical Observatories (AGOs) have proven effective for providing real-time geophysical data reliably. Five AGOs that span from the auroral zone to deep in the polar cap will be maintained providing a wealth of data for science analyses. Additional instrumentation as GPS-based receivers measuring total electron content in the ionosphere will be deployed at AGOs. These scientific investigations will be enriched by complementary measurements from manned stations in the Antarctic, from magnetically conjugate regions in the Arctic, and from a fleet of magnetospheric and ionospheric spacecraft. Continued reliance on students provides a broader impact to this proposed research and firmly grounds this effort in its educational mission.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Atmosphere; Keogram; Potential Field", "locations": "Antarctica", "north": -75.0, "nsf_funding_programs": null, "persons": "Frey, Harald; Mende, Stephen", "project_titles": "Collaborative Research: PENGUIn - A High-Latitude Window to Geospace Dynamics", "projects": [{"proj_uid": "p0000685", "repository": "USAP-DC", "title": "Collaborative Research: PENGUIn - A High-Latitude Window to Geospace Dynamics"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "PENGUIn - A High-Latitude Window to Geospace Dynamics", "uid": "600109", "west": -180.0}, {"awards": "0338087 Scheltema, Rudolf", "bounds_geometry": ["POLYGON((-70 -53,-68.4 -53,-66.8 -53,-65.2 -53,-63.6 -53,-62 -53,-60.4 -53,-58.8 -53,-57.2 -53,-55.6 -53,-54 -53,-54 -54.5,-54 -56,-54 -57.5,-54 -59,-54 -60.5,-54 -62,-54 -63.5,-54 -65,-54 -66.5,-54 -68,-55.6 -68,-57.2 -68,-58.8 -68,-60.4 -68,-62 -68,-63.6 -68,-65.2 -68,-66.8 -68,-68.4 -68,-70 -68,-70 -66.5,-70 -65,-70 -63.5,-70 -62,-70 -60.5,-70 -59,-70 -57.5,-70 -56,-70 -54.5,-70 -53))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "Because of extreme isolation of the Antarctic continent since the Early Oligocene, one expects a unique invertebrate benthic fauna with a high degree of endemism. Yet some invertebrate taxa that constitute important ecological components of sedimentary benthic communities include more than 40 percent non-endemic species (e.g., benthic polychaetes). To account for non-endemic species, intermittent genetic exchange must occur between Antarctic and other (e.g. South American) populations. The most likely mechanism for such gene flow, at least for in-faunal and mobile macrobenthos, is dispersal of planktonic larvae across the sub- Antarctic and Antarctic polar fronts. To test for larval dispersal as a mechanism of maintaining genetic continuity across polar fronts, the scientists propose to (1) take plankton samples along transects across Drake passage during both the austral summer and winter seasons while concurrently collecting the appropriate hydrographic data. Such data will help elucidate the hydrographic mechanisms that allow dispersal across Drake Passage. Using a molecular phylogenetic approach, they will (2) compare seemingly identical adult forms from Antarctic and South America continents to identify genetic breaks, historical gene flow, and control for the presence of cryptic species. (3) Similar molecular tools will be used to relate planktonic larvae to their adult forms. Through this procedure, they propose to link the larval forms respectively to their Antarctic or South America origins. The proposed work builds on previous research that provides the basis for this effort to develop a synthetic understanding of historical gene flow and present day dispersal mechanism in South American/Drake Passage/Antarctic Peninsular region. Furthermore, this work represents one of the first attempts to examine recent gene flow in Antarctic benthic invertebrates. Graduate students and a postdoctoral fellow will be trained during this research.", "east": -54.0, "geometry": ["POINT(-62 -60.5)"], "keywords": "Antarctica; Biota; Oceans; R/v Laurence M. Gould; Sample/collection Description; Sample/Collection Description; Southern Ocean", "locations": "Southern Ocean; Antarctica", "north": -53.0, "nsf_funding_programs": null, "persons": "Scheltema, Rudolf", "project_titles": "Collaborative Research: Relevance of Planktonic Larval Dispersal to Endemism and Biogeography of Antarctic Benthic Invertebrates", "projects": [{"proj_uid": "p0000189", "repository": "USAP-DC", "title": "Collaborative Research: Relevance of Planktonic Larval Dispersal to Endemism and Biogeography of Antarctic Benthic Invertebrates"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -68.0, "title": "Relevance of Planktonic Larval Dispersal to Endemism and Biogeography of Antarctic Benthic Invertebrates", "uid": "600035", "west": -70.0}, {"awards": "0538120 Catania, Ginny", "bounds_geometry": ["POLYGON((-160 -81,-158.5 -81,-157 -81,-155.5 -81,-154 -81,-152.5 -81,-151 -81,-149.5 -81,-148 -81,-146.5 -81,-145 -81,-145 -81.2,-145 -81.4,-145 -81.6,-145 -81.8,-145 -82,-145 -82.2,-145 -82.4,-145 -82.6,-145 -82.8,-145 -83,-146.5 -83,-148 -83,-149.5 -83,-151 -83,-152.5 -83,-154 -83,-155.5 -83,-157 -83,-158.5 -83,-160 -83,-160 -82.8,-160 -82.6,-160 -82.4,-160 -82.2,-160 -82,-160 -81.8,-160 -81.6,-160 -81.4,-160 -81.2,-160 -81))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "These data consist of ice-penetrating radar data collected on the ground across the grounding line near Siple Dome during the 2006 and 2007 Antarctic summer field seasons. Primarily, the data consist of low-frequency radar data (2 MHz, approximately 50 meter resolution) in order to observe deep internal layers and the ice-bed interface. The data set also contains one file with high-frequency (100 MHz, approximately 1 meter resolution) radar data, for a sub-region of one of the low-frequency radar profiles. Coincident kinematic GPS data were also collected to correct the radar data for topography along each profile. Radar profiles are typically approximately 20 km in length with the grounding line crossed centrally where possible. \n\nData are available via FTP in Matlab (.mat) format.", "east": -145.0, "geometry": ["POINT(-152.5 -82)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; GPR; Grounding Line; Radar; Siple Coast", "locations": "Siple Coast; Antarctica", "north": -81.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Hulbe, Christina; Catania, Ginny", "project_titles": "Collaborative Research: Grounding Line Forensics: The History of Grounding Line Retreat in the Kamb Ice Stream Outlet Region", "projects": [{"proj_uid": "p0000019", "repository": "USAP-DC", "title": "Collaborative Research: Grounding Line Forensics: The History of Grounding Line Retreat in the Kamb Ice Stream Outlet Region"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -83.0, "title": "Ice-Penetrating Radar Data Across Siple Coast Grounding Lines", "uid": "609474", "west": -160.0}, {"awards": "0439906 Koch, Paul", "bounds_geometry": ["POLYGON((162 -72,162.6 -72,163.2 -72,163.8 -72,164.4 -72,165 -72,165.6 -72,166.2 -72,166.8 -72,167.4 -72,168 -72,168 -72.6,168 -73.2,168 -73.8,168 -74.4,168 -75,168 -75.6,168 -76.2,168 -76.8,168 -77.4,168 -78,167.4 -78,166.8 -78,166.2 -78,165.6 -78,165 -78,164.4 -78,163.8 -78,163.2 -78,162.6 -78,162 -78,162 -77.4,162 -76.8,162 -76.2,162 -75.6,162 -75,162 -74.4,162 -73.8,162 -73.2,162 -72.6,162 -72))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "During previous NSF-sponsored research, the PI\u0027s discovered that southern elephant seal colonies once existed along the Victoria Land coast (VLC) of Antarctica, a region where they are no longer observed. Molted seal skin and hair occur along 300 km of coastline, more than 1000 km from any extant colony. The last record of a seal at a former colony site is at ~A.D. 1600. Because abandonment occurred prior to subantarctic sealing, disappearance of the VLC colony probably was due to environmental factors, possibly cooling and encroachment of land-fast, perennial sea ice that made access to haul-out sites difficult. The record of seal inhabitation along the VLC, therefore, has potential as a proxy for climate change. Elephant seals are a predominantly subantarctic species with circumpolar distribution. Genetic studies have revealed significant differentiation among populations, particularly with regard to that at Macquarie I., which is the extant population nearest to the abandoned VLC colony. Not only is the Macquarie population unique genetically, but it is has undergone unexplained decline of 2%/yr over the last 50 years3. In a pilot study, genetic analyses showed a close relationship between the VLC seals and those at Macquarie I. An understanding of the relationship between the two populations, as well as of the environmental pressures that led to the demise of the VLC colonies, will provide a better understanding of present-day population genetic structure, the effect of environmental change on seal populations, and possibly the reasons underlying the modern decline at Macquarie Island. This project addresses several key research problems: (1) Why did elephant seals colonize and then abandon the VLC? (2) What does the elephant seal record reveal about Holocene climate change and sea-ice conditions? (3) What were the foraging strategies of the seals and did these strategies change over time as climate varied? (4) How does the genetic structure of the VLC seals relate to extant populations? (5) How did genetic diversity change over time and with colony decline? (6) Using ancient samples to estimate mtDNA mutation rates, what can be learned about VLC population dynamics over time? (7) What was the ecological relationship between elephant seals and Adelie penguins that occupied the same sites, but apparently at different times? The proposed work includes the professional training of young researchers and incorporation of data into graduate and undergraduate courses.\n\nBecause of extreme isolation of the Antarctic continent since the \nEarly Oligocene, one expects a unique invertebrate benthic fauna with \na high degree of endemism. Yet some invertebrate taxa that constitute \nimportant ecological components of sedimentary benthic communities \ninclude more than 40 percent non-endemic species (e.g., benthic \npolychaetes). To account for non-endemic species, intermittent genetic \nexchange must occur between Antarctic and other (e.g. South American) \npopulations. The most likely mechanism for such gene flow, at least \nfor in-faunal and mobile macrobenthos, is dispersal of planktonic \nlarvae across the sub- Antarctic and Antarctic polar fronts. To test \nfor larval dispersal as a mechanism of maintaining genetic continuity \nacross polar fronts, the scientists propose to (1) take plankton \nsamples along transects across Drake passage during both the austral \nsummer and winter seasons while concurrently collecting the \nappropriate hydrographic data. Such data will help elucidate the \nhydrographic mechanisms that allow dispersal across Drake Passage. \nUsing a molecular phylogenetic approach, they will (2) compare \nseemingly identical adult forms from Antarctic and South America \ncontinents to identify genetic breaks, historical gene flow, and \ncontrol for the presence of cryptic species. (3) Similar molecular \ntools will be used to relate planktonic larvae to their adult forms. \nThrough this procedure, they propose to link the larval forms \nrespectively to their Antarctic or South America origins. The proposed \nwork builds on previous research that provides the basis for this \neffort to develop a synthetic understanding of historical gene flow \nand present day dispersal mechanism in South American/Drake Passage/ \nAntarctic Peninsular region. Furthermore, this work represents one of \nthe first attempts to examine recent gene flow in Antarctic benthic \ninvertebrates. Graduate students and a postdoctoral fellow will be \ntrained during this research\n", "east": 168.0, "geometry": ["POINT(165 -75)"], "keywords": "Biota; Isotope; Penguin; Ross Sea; Seals; Southern Ocean", "locations": "Southern Ocean; Ross Sea", "north": -72.0, "nsf_funding_programs": null, "persons": "Koch, Paul", "project_titles": "Collaborative Research: Abandoned Elephant Seal Colonies in Antarctica: Integration of Genetic, Isotopic, and Geologic Approaches toward Understanding Holocene Environmental Change", "projects": [{"proj_uid": "p0000533", "repository": "USAP-DC", "title": "Collaborative Research: Abandoned Elephant Seal Colonies in Antarctica: Integration of Genetic, Isotopic, and Geologic Approaches toward Understanding Holocene Environmental Change"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Abandoned Elephant Seal Colonies in Antarctica: Integration of Genetic, Isotopic, and Geologic Approaches toward Understanding Holocene Environmental Change", "uid": "600041", "west": 162.0}, {"awards": "0338008 Wemple, Beverley", "bounds_geometry": ["POINT(-72 43)"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "This data set contains sublimation rate data from laboratory studies of snow. Parameters include flow rate, measured sublimation rate, and theoretical maximum sublimation rate. Data were collected in cold rooms at the Cold Regions Research and Engineering Laboratory (CRREL), in Hanover, NH, during 2005 and 2006. The data were collected as part of a collaborative research project. The project aims to develop a quantitative understanding of the processes active in isotopic exchange between snow/firn and water vapor, which is important to Antarctic ice core interpretation.\n\nData are available via FTP in Microsoft Excel (.xls) format.", "east": -72.0, "geometry": ["POINT(-72 43)"], "keywords": "Atmosphere; Chemistry:ice; Chemistry:Ice; Snow/ice; Snow/Ice; Snow Sublimation Rate", "locations": null, "north": 43.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Neumann, Thomas A.", "project_titles": "Collaborative Research: Laboratory Studies of Isotopic Exchange in Snow and Firn", "projects": [{"proj_uid": "p0000132", "repository": "USAP-DC", "title": "Collaborative Research: Laboratory Studies of Isotopic Exchange in Snow and Firn"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": 43.0, "title": "Laboratory Studies of Isotopic Exchange in Snow", "uid": "609445", "west": -72.0}, {"awards": "0338008 Wemple, Beverley", "bounds_geometry": ["POLYGON((-71.77 43.96,-71.766 43.96,-71.762 43.96,-71.758 43.96,-71.754 43.96,-71.75 43.96,-71.746 43.96,-71.742 43.96,-71.738 43.96,-71.734 43.96,-71.73 43.96,-71.73 43.955,-71.73 43.95,-71.73 43.945,-71.73 43.94,-71.73 43.935,-71.73 43.93,-71.73 43.925,-71.73 43.92,-71.73 43.915,-71.73 43.91,-71.734 43.91,-71.738 43.91,-71.742 43.91,-71.746 43.91,-71.75 43.91,-71.754 43.91,-71.758 43.91,-71.762 43.91,-71.766 43.91,-71.77 43.91,-71.77 43.915,-71.77 43.92,-71.77 43.925,-71.77 43.93,-71.77 43.935,-71.77 43.94,-71.77 43.945,-71.77 43.95,-71.77 43.955,-71.77 43.96))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "This data set contains snow depth, Snow Water Equivalent (SWE), and forest cover characteristics for sites at the Hubbard Brook Experimental Forest in northern New Hampshire. Measurements were made at 26 sampling sites on 4 March and 1 April 2009.The data were collected as part of a collaborative research project on isotopic exchange in snow. The project aims to develop a quantitative understanding of the processes active in isotopic exchange between snow/firn and water vapor, which is important to Antarctic ice core interpretation. Data are in Microsoft Excel (.xls) format. The data set also includes maps showing site locations in Joint Photography Experts Group (.jpg) format.", "east": -71.73, "geometry": ["POINT(-71.75 43.935)"], "keywords": "Snow/ice; Snow/Ice", "locations": null, "north": 43.96, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Wemple, Beverley C.", "project_titles": "Collaborative Research: Laboratory Studies of Isotopic Exchange in Snow and Firn", "projects": [{"proj_uid": "p0000132", "repository": "USAP-DC", "title": "Collaborative Research: Laboratory Studies of Isotopic Exchange in Snow and Firn"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": 43.91, "title": "Snow Accumulation and Snow Melt in a Mixed Northern Hardwood-Conifer Forest", "uid": "609441", "west": -71.77}, {"awards": "0338097 DiTullio, Giacomo", "bounds_geometry": ["POLYGON((-169.94 -52.24,-169.449 -52.24,-168.958 -52.24,-168.467 -52.24,-167.976 -52.24,-167.485 -52.24,-166.994 -52.24,-166.503 -52.24,-166.012 -52.24,-165.521 -52.24,-165.03 -52.24,-165.03 -54.879,-165.03 -57.518,-165.03 -60.157,-165.03 -62.796,-165.03 -65.435,-165.03 -68.074,-165.03 -70.713,-165.03 -73.352,-165.03 -75.991,-165.03 -78.63,-165.521 -78.63,-166.012 -78.63,-166.503 -78.63,-166.994 -78.63,-167.485 -78.63,-167.976 -78.63,-168.467 -78.63,-168.958 -78.63,-169.449 -78.63,-169.94 -78.63,-169.94 -75.991,-169.94 -73.352,-169.94 -70.713,-169.94 -68.074,-169.94 -65.435,-169.94 -62.796,-169.94 -60.157,-169.94 -57.518,-169.94 -54.879,-169.94 -52.24))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "The objectives of this proposal are to investigate the controls on the large-scale distribution and production of the two major bloom-forming phytoplankton taxa in the Southern Ocean, diatoms and Phaeocystis Antarctica. These two groups, through their involvement in the biogeochemical cycles of carbon, sulfur and nutrient elements, may have played important roles in the climate variations of the late Quaternary, and they also may be key players in future environmental change. A current paradigm is that irradiance and iron availability drive phytoplankton dynamics in the Southern Ocean. Recent work, however, suggests that carbon dioxide (CO2) concentrations may also be important in structuring algal assemblages, due to species-specific differences in the physiology. This proposal examines the interactive effects of iron, light and CO2 on the physiology, ecology and relative dominance of Phaeocystis and diatoms in the Southern Ocean. The Ross Sea is an ideal system in which to investigate the environmental factors that regulate the distribution and production of these two algal groups, since it is characterized by seasonal blooms of both P. Antarctica and diatoms that are typically separated in both space and time. This study will take the form of an interdisciplinary investigation that includes a field survey and statistical analysis of algal assemblage composition, iron, mixed layer depth, and CO2 levels in the southern Ross Sea, coupled with shipboard experiments to examine the response of diatom and P. Antarctica assemblages to high and low levels of iron, light and CO2 during spring and summer. This project will provide information on some of the major factors controlling the production and distribution of the two major bloom forming phytoplankton in the Southern Ocean and the related biogeochemical cycling of carbon, sulfur and nutrient elements. The results may ultimately advance the ability to predict how the Southern Ocean will be affected by and possibly modulate future climate change. This project will also make significant educational contributions at several levels, including the planned research involvement of graduate and undergraduate students, postdoctoral associates, a student teacher, and community outreach and educational activities. A number of activities are planned to interface the project with K-12 education. Presentations will be made at local schools to discuss the research and events of the research cruise. During the cruise there will be daily interactive email contact with elementary classrooms. Established websites will be used to allow students to learn about the ongoing research, and to allow researchers to communicate with students through text and downloaded images.", "east": -165.03, "geometry": ["POINT(-167.485 -65.435)"], "keywords": "Biota; Chemistry:fluid; Chemistry:Fluid; Diatom; Oceans; Phytoplankton; Ross Sea; Southern Ocean", "locations": "Ross Sea; Southern Ocean", "north": -52.24, "nsf_funding_programs": null, "persons": "DiTullio, Giacomo", "project_titles": "Collaborative Research: Interactive Effects of Iron, Light and Carbon Dioxide on Phytoplankton Community Dynamics in the Ross Sea", "projects": [{"proj_uid": "p0000540", "repository": "USAP-DC", "title": "Collaborative Research: Interactive Effects of Iron, Light and Carbon Dioxide on Phytoplankton Community Dynamics in the Ross Sea"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.63, "title": "Interactive Effects of Iron, Light and Carbon Dioxide on Phytoplankton Community Dynamics in the Ross Sea", "uid": "600036", "west": -169.94}, {"awards": "0440687 Costa, Daniel", "bounds_geometry": ["POLYGON((-64 -60,-63 -60,-62 -60,-61 -60,-60 -60,-59 -60,-58 -60,-57 -60,-56 -60,-55 -60,-54 -60,-54 -60.4,-54 -60.8,-54 -61.2,-54 -61.6,-54 -62,-54 -62.4,-54 -62.8,-54 -63.2,-54 -63.6,-54 -64,-55 -64,-56 -64,-57 -64,-58 -64,-59 -64,-60 -64,-61 -64,-62 -64,-63 -64,-64 -64,-64 -63.6,-64 -63.2,-64 -62.8,-64 -62.4,-64 -62,-64 -61.6,-64 -61.2,-64 -60.8,-64 -60.4,-64 -60))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "As long-lived animals, marine mammals must be capable of accommodating broad variations in food resources over large spatial and temporal scales. While this is true of all marine mammals, variation in the physical and biological environmental is particularly profound in the Southern Ocean. A basic understanding of the foraging behavior and habitat utilization of pelagic predators requires knowledge of this spatial and temporal variation, coupled with information of how they respond to these changes. Current understanding of these associations is primarily limited to population level studies where animal abundance has been correlated with oceanography. Although these studies are informative, they cannot provide insights into the strategies employed by individual animals nor can they provide insights into the spatial or temporal course of these interactions. Recent technological advances in instrumentation make it possible to extend an understanding beyond the simple linkage of prey and predator distributions with environmental features. The key to understanding the processes that lead to high predator abundance is the identification of the specific foraging behaviors associated with different features of the water column. This study will accomplish these objectives by combining accurate positional data, measures of diving and foraging behavior, animal-derived water-column temperature and salinity data, and available oceanographic data. This project will examine the foraging behavior and habitat utilization of two species of contrasting foraging ecology, the southern elephant seal, Mirounga leonina, and the crabeater seal, Lobodon carcinophagus in the Western Antarctic Peninsula, a region of strong environmental gradients. Although these two species are phylogenetically related, they utilize substantially different but adjacent habitat types. Southern elephant seals are predominantly pelagic, moving throughout the southern ocean, venturing occasionally into the seasonal pack ice whereas crabeater seals range throughout the seasonal pack ice, venturing occasionally into open water. The relationship of specific foraging behaviors and animal movement patterns to oceanographic and bathymetric features develop and test models of the importance of these features in defining habitat use will be determined along with a comparison of how individuals of each species respond to annual variability in the marine environment. The physical oceanography of the Southern Ocean is inherently complex as are the biological processes that are intrinsically linked to oceanographic processes. Significant resources are currently being directed toward developing mathematical models of physical oceanographic processes with the goals of better understanding the role that the Southern Ocean plays in global climate processes, predicting the responses of ocean and global scale processes to climate change, and understanding the linkages between physical and biological oceanographic processes. These efforts have been limited by the scarcity of oceanographic data in the region, especially at high latitudes in the winter months. This study will provide new and significant oceanographic data on temperature and salinity profiles in to further the understanding of the dynamics of the upper water column of west Antarctic Peninsula continental shelf waters. Outreach activities include website development and an association with a marine education program at the Monterrey Bay Aquarium Research Institute.\n", "east": -54.0, "geometry": ["POINT(-59 -62)"], "keywords": "Bellingshausen Sea; Biota; Oceans; Seals; Southern Ocean", "locations": "Southern Ocean; Bellingshausen Sea", "north": -60.0, "nsf_funding_programs": null, "persons": "Klinck, John M.; Crocker, Daniel; Goebel, Michael; Hofmann, Eileen; Costa, Daniel", "project_titles": "Habitat Utilization of Southern Ocean Seals: Foraging Behavior of Crabeater and Elephant Seals Using Novel Methods of Oceanographic Data Collection", "projects": [{"proj_uid": "p0000082", "repository": "USAP-DC", "title": "Habitat Utilization of Southern Ocean Seals: Foraging Behavior of Crabeater and Elephant Seals Using Novel Methods of Oceanographic Data Collection"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.0, "title": "Habitat Utilization of Southern Ocean Seals: Foraging Behavior of Crabeater and Elephant Seals Using Novel Methods of Oceanographic Data Collection", "uid": "600044", "west": -64.0}, {"awards": "0840375 Costa, Daniel", "bounds_geometry": ["POLYGON((-64 -60,-63 -60,-62 -60,-61 -60,-60 -60,-59 -60,-58 -60,-57 -60,-56 -60,-55 -60,-54 -60,-54 -60.4,-54 -60.8,-54 -61.2,-54 -61.6,-54 -62,-54 -62.4,-54 -62.8,-54 -63.2,-54 -63.6,-54 -64,-55 -64,-56 -64,-57 -64,-58 -64,-59 -64,-60 -64,-61 -64,-62 -64,-63 -64,-64 -64,-64 -63.6,-64 -63.2,-64 -62.8,-64 -62.4,-64 -62,-64 -61.6,-64 -61.2,-64 -60.8,-64 -60.4,-64 -60))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "Long-lived animals such as elephant seals may endure variation in food resources over large spatial and temporal scales. Understanding how they respond to these fluctuations requires knowledge of how their foraging behavior and habitat utilization varies over time. Advances in satellite-linked data logging have made it possible to correlate the foraging behavior of marine mammals with their physical and chemical environment and provide insight into the mechanisms controlling at-sea movements, foraging behavior and, ultimately, reproductive success of these pelagic predators. In addition, these technological advances enable marine mammals to be used as highly cost-effective platforms from which detailed oceanographic data can be collected on a scale not possible with conventional methods. The project will extend the four-year-time-series collected on the foraging behavior and habitat utilization of southern elephant seal (Mirounga leonina) foraging in the Western Antarctic Peninsula. It also will extend the oceanographic time-series of CTD profiles collected by the elephant seals foraging from the Livingston Island rookery. Seals have been collecting CTD profiles in the vicinity of the Wilkins Ice Shelf (WIS) since 2005. We thus have a 4 year data set that preceding and during the breakup of the WIS that occurred during March 2008. Deployment of additional tags on seals will provide a unique opportunity to collect oceanographic data after the ice shelf has collapsed.", "east": -54.0, "geometry": ["POINT(-59 -62)"], "keywords": "Biota; CTD Data; Oceans; Physical Oceanography; Seals; Southern Ocean", "locations": "Southern Ocean", "north": -60.0, "nsf_funding_programs": null, "persons": "Goebel, Michael; Costa, Daniel", "project_titles": "SGER: Foraging Patterns of Elephant Seals in the Vicinity of the WIlkins Ice Shelf", "projects": [{"proj_uid": "p0000158", "repository": "USAP-DC", "title": "SGER: Foraging Patterns of Elephant Seals in the Vicinity of the WIlkins Ice Shelf"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.0, "title": "SGER: Foraging Patterns of Elephant Seals in the Vicinity of the WIlkins Ice Shelf", "uid": "600108", "west": -64.0}, {"awards": "0838838 Evenson, Paul", "bounds_geometry": ["POLYGON((-165.89 -56.02,-150.571 -56.02,-135.252 -56.02,-119.933 -56.02,-104.614 -56.02,-89.295 -56.02,-73.976 -56.02,-58.657 -56.02,-43.338 -56.02,-28.019 -56.02,-12.7 -56.02,-12.7 -58.203,-12.7 -60.386,-12.7 -62.569,-12.7 -64.752,-12.7 -66.935,-12.7 -69.118,-12.7 -71.301,-12.7 -73.484,-12.7 -75.667,-12.7 -77.85,-28.019 -77.85,-43.338 -77.85,-58.657 -77.85,-73.976 -77.85,-89.295 -77.85,-104.614 -77.85,-119.933 -77.85,-135.252 -77.85,-150.571 -77.85,-165.89 -77.85,-165.89 -75.667,-165.89 -73.484,-165.89 -71.301,-165.89 -69.118,-165.89 -66.935,-165.89 -64.752,-165.89 -62.569,-165.89 -60.386,-165.89 -58.203,-165.89 -56.02))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "We determined a set of cosmic ray response functions for the ice Cherenkov detector used by the surface air shower IceTop, part of the IceCube Neutrino Observatory at the South Pole. At the same time we measured the response function of moderated neutron detectors that are now in use in conjunction with IceTop. We did this by means of a global latitude survey conducted with a detector identical to the IceTop sensors built in a freezer van installed on the Swedish icebreaker Oden. The freezer van also housed the moderated neutron detectors. Cosmic rays shower data were recorded on the Oden voyage from Sweden to McMurdo and return during the 2009-2010 austral summer season. Reliance on student observers and data analysts enhanced the broader impact of this research and firmly grounds this effort in its educational mission.", "east": -12.7, "geometry": ["POINT(-89.295 -66.935)"], "keywords": "Antarctica; Atmosphere; Cosmic Ray; Cosmos; Icecube; Oden; Southern Ocean", "locations": "Antarctica; Southern Ocean", "north": -56.02, "nsf_funding_programs": null, "persons": "Tilav, Serap; Evenson, Paul; Bieber, John; Clem, John", "project_titles": "Collaborative Research: Measurement of Cosmic Ray Response Functions for an Ice Cherenkov Detector", "projects": [{"proj_uid": "p0000516", "repository": "USAP-DC", "title": "Collaborative Research: Measurement of Cosmic Ray Response Functions for an Ice Cherenkov Detector"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.85, "title": "Measurement of Cosmic Ray Response Functions for an Ice Cherenkov Detector", "uid": "600098", "west": -165.89}, {"awards": "0836112 Smith, Walker", "bounds_geometry": ["POLYGON((-170 -69,-163 -69,-156 -69,-149 -69,-142 -69,-135 -69,-128 -69,-121 -69,-114 -69,-107 -69,-100 -69,-100 -70,-100 -71,-100 -72,-100 -73,-100 -74,-100 -75,-100 -76,-100 -77,-100 -78,-100 -79,-107 -79,-114 -79,-121 -79,-128 -79,-135 -79,-142 -79,-149 -79,-156 -79,-163 -79,-170 -79,-170 -78,-170 -77,-170 -76,-170 -75,-170 -74,-170 -73,-170 -72,-170 -71,-170 -70,-170 -69))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "Convincing evidence now confirms that polar regions are changing rapidly in response to human activities. Changes in sea ice extent and thickness will have profound implications for productivity, food webs and carbon fluxes at high latitudes, since sea ice biota are a significant source of biogenic matter for the ecosystem. While sea ice is often thought to be a barrier to gas exchange between the ocean and the atmosphere, it more likely functions as a source or sink for climate-active gases such as carbon dioxide and ozone-depleting organohalogens, due in part to activities of microbes embedded in the sea ice matrix. This project brings together experienced US and Swedish investigators to examine the controls by sea-ice biota on the production and degradation of key climate-active gases in the Pacific sector of the Southern Ocean. We hypothesize that 1) the physical properties of the sea-ice environment will determine the community structure and activities of the sea ice biota; 2) the productivity, biomass, physiological state and species composition of ice algae will determine the production of specific classes of organic carbon, including organohalogens; 3) heterotrophic co-metabolism within the ice will break down these compounds to some extent, depending on the microbial community structure and productivity, and 4) the sea ice to atmosphere fluxes of CO2 and organohalogens will be inversely related. This project will build close scientific collaborations between US and Swedish researchers and also train young scientists, including members of underrepresented groups. Dissemination of results will include the scientific literature, and public outreach venues including interactions with a PolarTrec teacher.\n", "east": -100.0, "geometry": ["POINT(-135 -74)"], "keywords": "Amundsen Sea; Antarctica; Chemistry:fluid; Chemistry:Fluid; CTD Data; Oceans; Oden; Oden2008; Sea Ice; Sea Surface; Southern Ocean", "locations": "Amundsen Sea; Sea Surface; Southern Ocean; Antarctica", "north": -69.0, "nsf_funding_programs": null, "persons": "Smith, Walker", "project_titles": "Collaborative Research: Controls on climate-active gases by Amundsen Sea ice biota", "projects": [{"proj_uid": "p0000137", "repository": "USAP-DC", "title": "Collaborative Research: Controls on climate-active gases by Amundsen Sea ice biota"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.0, "title": "Controls on Climate-Active Gases by Amundsen Sea Ice Biota", "uid": "600092", "west": -170.0}, {"awards": "9024544 Andreas, Edgar", "bounds_geometry": ["POLYGON((-53.8 -61.2,-52.74 -61.2,-51.68 -61.2,-50.62 -61.2,-49.56 -61.2,-48.5 -61.2,-47.44 -61.2,-46.38 -61.2,-45.32 -61.2,-44.26 -61.2,-43.2 -61.2,-43.2 -62.22,-43.2 -63.24,-43.2 -64.26,-43.2 -65.28,-43.2 -66.3,-43.2 -67.32,-43.2 -68.34,-43.2 -69.36,-43.2 -70.38,-43.2 -71.4,-44.26 -71.4,-45.32 -71.4,-46.38 -71.4,-47.44 -71.4,-48.5 -71.4,-49.56 -71.4,-50.62 -71.4,-51.68 -71.4,-52.74 -71.4,-53.8 -71.4,-53.8 -70.38,-53.8 -69.36,-53.8 -68.34,-53.8 -67.32,-53.8 -66.3,-53.8 -65.28,-53.8 -64.26,-53.8 -63.24,-53.8 -62.22,-53.8 -61.2))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "Location: Ice camp on perennial sea ice in the southwestern corner of the Weddell Sea, Antarctic\n\nThe first direct radiative and turbulent surface flux measurements ever made over floating Antarctic sea ice. The data are from Ice Station Weddell as it drifted in the western Weddell Sea from February to late May 1992.\n\nData Types:\n\nHourly measurements of the turbulent surface fluxes of momentum and sensible and latent heat by eddy covariance at a height of 4.65 m above snow-covered sea ice. Instruments were a 3-axis sonic anemometer/thermometer and a Lyman-alpha hygrometer.\n\nHourly, surface-level measurements of the four radiation components: in-coming and out-going longwave and shortwave radiation. Instruments were hemispherical pyranometers and pyrgeometers.\n\nHourly mean values of standard meteorological variables: air temperature, dew point temperature, wind speed and direction, barometric pressure, surface temperature. Instruments were a propeller-vane for wind speed and direction and cooled-mirror dew-point hygrometers and platinum resistance thermometers for dew-points and temperatures. Surface temperature came from a Barnes PRT-5 infrared thermometer.\n\nFlux Data\nThe entire data kit is bundled as a zip file named ISW_Flux_Data.zip\nThe main data file is comma delimited.\nThe README file is ASCII.\nThe associated reprints of publications are in pdf.\n\nRadiosounding data: On Ice Station Weddell, typically twice a day from 21 February through 4 June 1992 made with both tethered (i.e., only boundary-layer profiles) and (more rarely) free-flying sondes that did not measure wind speed. (168 soundings).\n\nISW Radiosoundings\nThe entire data kit is bundled as a zip file named ISW_Radiosounding.zip.\nThe README file is in ASCII.\nTwo summary files that include the list of sounding and the declinations are in ASCII.\nThe 168 individual sounding files are in ASCII.\nTwo supporting publications that describe the data and some analyses are in pdf.\n\nRadiosounding data collected from the Russian ship Akademic Fedorov from 26 May through 5 June 1992 at 6-hourly intervals as it approached Ice Station Weddell from the north. These soundings include wind vector, temperature, humidity, and pressure. (40 soundings)\n\nAkademic Federov Radiosoundings\nThe entire data kit is bundled as a zip file named Akad_Federov_Radiosounding.zip.\nThe README file is in ASCII.\nA summary file that lists the soundings is in ASCII.\nThe 40 individual sounding files are in ASCII.\nTwo supporting publications that describe the data and some analyses are in pdf.\n\n\nDocumentation:\n\nAndreas, E. L, and K. J. Claffey, 1995: Air-ice drag coefficients in the western Weddell Sea: 1. Values deduced from profile measurements. Journal of Geophysical Research, 100, 4821\u20134831.\n\nAndreas, E. L, K. J. Claffey, and A. P. Makshtas, 2000: Low-level atmospheric jets and inversions over the western Weddell Sea. Boundary-Layer Meteorology, 97, 459\u2013486.\n\nAndreas, E. L, R. E. Jordan, and A. P. Makshtas, 2004: Simulations of snow, ice, and near-surface atmospheric processes on Ice Station Weddell. Journal of Hydrometeorology, 5, 611\u2013624.\n\nAndreas, E. L, R. E. Jordan, and A. P. Makshtas, 2005: Parameterizing turbulent exchange over sea ice: The Ice Station Weddell results. Boundary-Layer Meteorology, 114, 439\u2013460.\n\nAndreas, E. L, P. O. G. Persson, R. E. Jordan, T. W. Horst, P. S. Guest, A. A. Grachev, and C. W. Fairall, 2010: Parameterizing turbulent exchange over sea ice in winter. Journal of Hydrometeorology, 11, 87\u2013104.\n\nClaffey, K. J., E. L Andreas, and A. P. Makshtas, 1994: Upper-air data collected on Ice Station Weddell. Special Report 94-25, U.S. Army Cold Regions Research and Engineering Laboratory, Hanover, NH, 62 pp.\n\nISW Group, 1993: Weddell Sea exploration from ice station. Eos, Transactions, American Geophysical Union, 74, 121\u2013126.\n\nMakshtas, A. P., E. L Andreas, P. N. Svyaschennikov, and V. F. Timachev, 1999: Accounting for clouds in sea ice models. Atmospheric Research, 52, 77\u2013113.", "east": -43.2, "geometry": ["POINT(-48.5 -66.3)"], "keywords": "Antarctica; Atmosphere; Critical Zone; Meteorology; Oceans; Radiosounding; Southern Ocean; Weddell Sea", "locations": "Weddell Sea; Antarctica; Southern Ocean", "north": -61.2, "nsf_funding_programs": null, "persons": "Andreas, Edgar", "project_titles": "Atmospheric Boundary Layer Measurements on the Weddell Sea Drifting Station", "projects": [{"proj_uid": "p0000655", "repository": "USAP-DC", "title": "Atmospheric Boundary Layer Measurements on the Weddell Sea Drifting Station"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -71.4, "title": "Atmospheric Boundary Layer Measurements on the Weddell Sea Drifting Station", "uid": "600141", "west": -53.8}, {"awards": "0808947 Hofmann, Gretchen", "bounds_geometry": ["POLYGON((-160 -70,-159 -70,-158 -70,-157 -70,-156 -70,-155 -70,-154 -70,-153 -70,-152 -70,-151 -70,-150 -70,-150 -70.7,-150 -71.4,-150 -72.1,-150 -72.8,-150 -73.5,-150 -74.2,-150 -74.9,-150 -75.6,-150 -76.3,-150 -77,-151 -77,-152 -77,-153 -77,-154 -77,-155 -77,-156 -77,-157 -77,-158 -77,-159 -77,-160 -77,-160 -76.3,-160 -75.6,-160 -74.9,-160 -74.2,-160 -73.5,-160 -72.8,-160 -72.1,-160 -71.4,-160 -70.7,-160 -70))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "This Small Grant for Exploratory Research (SGER) will support the rapid acquisition of DNA sequence for the Antarctic pteropod Limacina helicina, a resource that would allow the development of a cDNA microarray to profile gene expression in this critical marine invertebrate in response to ocean acidification. This request would facilitate the collaboration of the PI (Hofmann), a marine molecular ecologist, with co-PI, Prof. Victoria Fabry, an expert in pteropod calcification biology, and a leader in the ocean acidification research community. Finally, the resources developed here would be shared with the polar research community and all DNA sequence data and protocols would be available via web databases. Notably, the genomic tool developed here would most likely be useful for pteropods from Antarctic and Arctic waters. The broader impacts of this project would be the development of genomic tools for a critical Antarctic marine invertebrate that is threatened by ocean acidification. In addition, these resources would be shared with the polar biology research community.", "east": -150.0, "geometry": ["POINT(-155 -73.5)"], "keywords": "Biota; Genomics; Oceans; Southern Ocean", "locations": "Southern Ocean", "north": -70.0, "nsf_funding_programs": null, "persons": "Fabry, Victoria; Hofmann, Gretchen", "project_titles": "Science of Opportunity: A SGER proposal to support the development of genomic resources for Antarctic pteropods", "projects": [{"proj_uid": "p0000213", "repository": "USAP-DC", "title": "Science of Opportunity: A SGER proposal to support the development of genomic resources for Antarctic pteropods"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.0, "title": "Science of Opportunity: A SGER proposal to support the development of genomic resources for Antarctic pteropods", "uid": "600088", "west": -160.0}, {"awards": "0801392 Swanson, Brian", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "The primary objective of this research is to investigate polar marine psychrophilic bacteria for their potential to nucleate ice using a combination of microbiological, molecular biological and atmospheric science approaches in the laboratory. Very little is known about how psychrophiles interact and cope with ice or their adaptations to conditions of extreme cold and salinity. This work will involve a series of laboratory experiments using a novel freeze-tube technique for assaying freezing spectra which will provide quantitative information on: (i) the temperature-dependent freezing rates for heterogeneously frozen droplets containing sea-ice bacteria, (ii) the proportional occurrence of ice-nucleation activity versus anti-freeze activity among sea-ice bacterial isolates and (iii) the temperature-dependent freezing rates of bacteria with ice-nucleation activity grown at a range of temperatures and salinities. The compound(s) responsible for the observed activity will be identified, which is an essential step towards the development of an in-situ bacterial ice-nucleation detection assay that can be applied in the field to Antarctic water and cloud samples. One of the goals of this work is to better understand survival and cold adaptation processes of polar marine bacteria confronted with freezing conditions in sea ice. Since sea ice strongly impacts polar, as well as the global climates, this research is of significant interest because it will also provide data for accessing the importance of bacterial ice nucleation in the formation of sea ice. These measurements of ice-nucleation rates will be the first high-resolution measurements for psychrophilic marine bacteria. Another goal is to better understand the impact of bacterial ice initiation processes in polar clouds by making high-resolution measurements of nucleation rates for cloud bacteria found over Arctic and Antarctic regions. Initial measurements indicate these bacteria nucleate ice at warmer temperatures and the effect in polar regions may be quite important, since ice can strongly impact cloud dynamics, cloud radiative properties, precipitation formation, and cloud chemistry. If these initial measurements are confirmed, the data collected here will be important for improving the understanding of polar cloud processes and models. A third goal is to better understand the molecular basis of marine bacterial ice nucleation by characterizing the ice-nucleation compound and comparing it with those of known plant-derived ice-nucleating bacteria, which are the only ice-nucleating bacteria examined in detail to date. The proposed activity will support the beginning academic career of a post-doctoral researcher and will serve as the basis for several undergraduate student laboratory projects. Results from this research will be widely published in various scientific journals and outreach venues.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Biota; Microbiology; Oceans; Raman Spectroscopy; Sea Ice; Sea Surface; Southern Ocean", "locations": "Southern Ocean; Sea Surface", "north": -60.0, "nsf_funding_programs": null, "persons": "Swanson, Brian", "project_titles": "Ice Nucleation by Marine Psychrophiles", "projects": [{"proj_uid": "p0000195", "repository": "USAP-DC", "title": "Ice Nucleation by Marine Psychrophiles"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Ice Nucleation by Marine Psychrophiles", "uid": "600087", "west": -180.0}, {"awards": "0649609 Horning, Markus", "bounds_geometry": ["POLYGON((165.975 -77.54,166.0631 -77.54,166.1512 -77.54,166.2393 -77.54,166.3274 -77.54,166.4155 -77.54,166.5036 -77.54,166.5917 -77.54,166.6798 -77.54,166.7679 -77.54,166.856 -77.54,166.856 -77.5709,166.856 -77.6018,166.856 -77.6327,166.856 -77.6636,166.856 -77.6945,166.856 -77.7254,166.856 -77.7563,166.856 -77.7872,166.856 -77.8181,166.856 -77.849,166.7679 -77.849,166.6798 -77.849,166.5917 -77.849,166.5036 -77.849,166.4155 -77.849,166.3274 -77.849,166.2393 -77.849,166.1512 -77.849,166.0631 -77.849,165.975 -77.849,165.975 -77.8181,165.975 -77.7872,165.975 -77.7563,165.975 -77.7254,165.975 -77.6945,165.975 -77.6636,165.975 -77.6327,165.975 -77.6018,165.975 -77.5709,165.975 -77.54))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "The primary objectives of this research are to investigate the proximate effects of aging on diving capability in the Weddell Seal and to describe mechanisms by which aging may influence foraging ecology, through physiology and behavior. This model pinniped species has been the focus of three decades of research in McMurdo Sound, Antarctica. Compared to the knowledge of pinniped diving physiology and ecology during early development and young adulthood, little is known about individuals nearing the upper limit of their normal reproductive age range. Evolutionary aging theories predict that elderly diving seals should exhibit senescence. This should be exacerbated by surges in the generation of oxygen free radicals via hypoxia-reoxygenation during breath-hold diving and hunting, which are implicated in age-related damage to cellular mitochondria. Surprisingly, limited observations of non-threatened pinniped populations indicate that senescence does not occur to a level where reproductive output is affected. The ability of pinnipeds to avoid apparent senescence raises two major questions: what specific physiological and morphological changes occur with advancing age in pinnipeds; and what subtle adjustments are made by these animals to cope with such changes? This investigation will focus on specific, functional physiological and behavioral changes relating to dive capability with advancing age. Data will be compared between Weddell seals in the peak, and near the end, of their reproductive age range. The investigators will quantify age-related changes in general health and body condition, combined with fine scale assessments of external and internal ability to do work in the form of diving. Specifically, patterns of muscle morphology, oxidant status and oxygen storage with age will be examined. The effects of age on skeletal muscular function and exercise performance will also be examined. The investigators hypothesize that senescence does occur in Weddell seals at the level of small-scale, proximate physiological effects and performance, but that behavioral plasticity allows for a given degree of compensation. Broader impacts include the training of students and outreach activities including interviews and articles written for the popular media. This study should also establish diving seals as a novel model for the study of cardiovascular and muscular physiology of aging and develop a foundation for similar research on other species. Advancement of the understanding of aging by medical science has been impressive in recent years but basic mammalian aging is an area of study the still requires considerable effort. The development of new models for the study of aging has tremendous potential benefits to society at large.", "east": 166.856, "geometry": ["POINT(166.4155 -77.6945)"], "keywords": "Antarctica; Biota; McMurdo; Oceans; Seals; Southern Ocean", "locations": "Antarctica; McMurdo; Southern Ocean", "north": -77.54, "nsf_funding_programs": null, "persons": "Horning, Markus", "project_titles": "Collaborative Research: Aging in Weddell Seals: Proximate Mechanisms of Age-Related Changes in Adaptations to Breath-Hold Hunting in an Extreme Environment", "projects": [{"proj_uid": "p0000487", "repository": "USAP-DC", "title": "Collaborative Research: Aging in Weddell Seals: Proximate Mechanisms of Age-Related Changes in Adaptations to Breath-Hold Hunting in an Extreme Environment"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.849, "title": "Aging in Weddell Seals: Proximate Mechanisms of Age-Related Changes in Adaptations to Breath-Hold Hunting in an Extreme Environment", "uid": "600071", "west": 165.975}, {"awards": "0636730 Vernet, Maria", "bounds_geometry": ["POLYGON((-55 -52,-53.5 -52,-52 -52,-50.5 -52,-49 -52,-47.5 -52,-46 -52,-44.5 -52,-43 -52,-41.5 -52,-40 -52,-40 -53.3,-40 -54.6,-40 -55.9,-40 -57.2,-40 -58.5,-40 -59.8,-40 -61.1,-40 -62.4,-40 -63.7,-40 -65,-41.5 -65,-43 -65,-44.5 -65,-46 -65,-47.5 -65,-49 -65,-50.5 -65,-52 -65,-53.5 -65,-55 -65,-55 -63.7,-55 -62.4,-55 -61.1,-55 -59.8,-55 -58.5,-55 -57.2,-55 -55.9,-55 -54.6,-55 -53.3,-55 -52))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "Atmospheric warming has been associated with retreating glaciers, disintegrating ice shelves, and the increasing prevalence of icebergs in the Southern Ocean over the last decade. Our preliminary study of two icebergs in the NW Weddell Sea, an area of high iceberg concentration, showed significant delivery of terrestrial material accompanied by significant enhancement of phytoplankton and zooplankton/micronekton abundance, and primary production surrounding the icebergs. We hypothesize that nutrient enrichment by free-drifting icebergs will increase primary production and sedimentation of organic carbon, thus increasing the draw-down and sequestration of CO2 in the Southern Ocean and impacting the global carbon cycle. Our research addresses the following questions: 1) What is the relationship between the physical dynamics of free-drifting icebergs and the Fe and nutrient distributions of the surrounding water column? 2) What is the relationship between Fe and nutrient distributions associated with free-drifting icebergs and the organic carbon dynamics of the ice-attached and surrounding pelagic communities (microbes, zooplankton, micronekton)? 3) What is impact on the export flux of particulate organic carbon from the mixed layer? An interdisciplinary approach is proposed to examine iceberg structure and dynamics, biogeochemical processes, and carbon cycling that includes measurement of trace element, nutrient and radionuclide distributions; organic carbon dynamics mediated by microbial, ice-attached and zooplankton communities; and particulate organic carbon export fluxes. Results from this project will further our understanding of the relationship between climate change and carbon sequestration in the Southern Ocean. Our findings will be incorporated into the Antarctic Research division of the Ocean Exploration Center (OEC) as part of the SIOExplorer: Digital Library Project. The OEC allows users to access content, which is classified to one of four levels: entry (grade K-6), student (grade 6-12), college, and research. Graduate students, undergraduates, teachers, and volunteers are important participants in the proposed field and laboratory work. For the K-12 level, a professional writer of children\u0027s books will participate in cruises to produce an account of the expedition and a daily interactive website.\n", "east": -40.0, "geometry": ["POINT(-47.5 -58.5)"], "keywords": "Antarctica; Biota; Chemistry:fluid; Chemistry:Fluid; Geochemistry; NBP0902; Oceans; Physical Oceanography; Sea Surface; Southern Ocean; Weddell Sea", "locations": "Sea Surface; Southern Ocean; Weddell Sea; Antarctica", "north": -52.0, "nsf_funding_programs": null, "persons": "Vernet, Maria", "project_titles": "Collaborative Reseach: Free-drifting Icebergs as Proliferating Dispersion Sites of Iron Enrichment, Organic Carbon Production and Export in the Southern Ocean.", "projects": [{"proj_uid": "p0000532", "repository": "USAP-DC", "title": "Collaborative Reseach: Free-drifting Icebergs as Proliferating Dispersion Sites of Iron Enrichment, Organic Carbon Production and Export in the Southern Ocean."}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.0, "title": "Free-drifting Icebergs as Proliferating Dispersion Sites of Iron Enrichment, Organic Carbon Production and Export in the Southern Ocean", "uid": "600068", "west": -55.0}, {"awards": "0636723 Helly, John", "bounds_geometry": ["POLYGON((-55 -52,-53.5 -52,-52 -52,-50.5 -52,-49 -52,-47.5 -52,-46 -52,-44.5 -52,-43 -52,-41.5 -52,-40 -52,-40 -53.3,-40 -54.6,-40 -55.9,-40 -57.2,-40 -58.5,-40 -59.8,-40 -61.1,-40 -62.4,-40 -63.7,-40 -65,-41.5 -65,-43 -65,-44.5 -65,-46 -65,-47.5 -65,-49 -65,-50.5 -65,-52 -65,-53.5 -65,-55 -65,-55 -63.7,-55 -62.4,-55 -61.1,-55 -59.8,-55 -58.5,-55 -57.2,-55 -55.9,-55 -54.6,-55 -53.3,-55 -52))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "Atmospheric warming has been associated with retreating glaciers, disintegrating ice shelves, and the increasing prevalence of icebergs in the Southern Ocean over the last decade. Our preliminary study of two icebergs in the NW Weddell Sea, an area of high iceberg concentration, showed significant delivery of terrestrial material accompanied by significant enhancement of phytoplankton and zooplankton/micronekton abundance, and primary production surrounding the icebergs. We hypothesize that nutrient enrichment by free-drifting icebergs will increase primary production and sedimentation of organic carbon, thus increasing the draw-down and sequestration of CO2 in the Southern Ocean and impacting the global carbon cycle. Our research addresses the following questions: 1) What is the relationship between the physical dynamics of free-drifting icebergs and the Fe and nutrient distributions of the surrounding water column? 2) What is the relationship between Fe and nutrient distributions associated with free-drifting icebergs and the organic carbon dynamics of the ice-attached and surrounding pelagic communities (microbes, zooplankton, micronekton)? 3) What is impact on the export flux of particulate organic carbon from the mixed layer? An interdisciplinary approach is proposed to examine iceberg structure and dynamics, biogeochemical processes, and carbon cycling that includes measurement of trace element, nutrient and radionuclide distributions; organic carbon dynamics mediated by microbial, ice-attached and zooplankton communities; and particulate organic carbon export fluxes. Results from this project will further our understanding of the relationship between climate change and carbon sequestration in the Southern Ocean. Our findings will be incorporated into the Antarctic Research division of the Ocean Exploration Center (OEC) as part of the SIOExplorer: Digital Library Project. The OEC allows users to access content, which is classified to one of four levels: entry (grade K-6), student (grade 6-12), college, and research. Graduate students, undergraduates, teachers, and volunteers are important participants in the proposed field and laboratory work. For the K-12 level, a professional writer of children\u0027s books will participate in cruises to produce an account of the expedition and a daily interactive website.", "east": -40.0, "geometry": ["POINT(-47.5 -58.5)"], "keywords": "Antarctica; NBP0902; Oceans; Physical Oceanography; Southern Ocean; Weddell Sea", "locations": "Southern Ocean; Weddell Sea; Antarctica", "north": -52.0, "nsf_funding_programs": null, "persons": "Helly, John", "project_titles": "Collaborative Research: Free Drifting Icebergs as Proliferation Sites of Iron Enrichment, Organic Carbon Production and Export in the Southern Ocean", "projects": [{"proj_uid": "p0000511", "repository": "USAP-DC", "title": "Collaborative Research: Free Drifting Icebergs as Proliferation Sites of Iron Enrichment, Organic Carbon Production and Export in the Southern Ocean"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.0, "title": "Free-Drifting Icebergs as Proliferating Dispersion Sites of Iron Enrichment, Organic Carbon Production and Export in the Southern Ocean", "uid": "600067", "west": -55.0}, {"awards": "0520523 Brook, Edward J.", "bounds_geometry": ["POINT(-38.466667 73.583333)", "POINT(-148.81 -81.65)"], "date_created": "Wed, 09 Dec 2009 00:00:00 GMT", "description": "This data set contains methane measurements made in trapped air in the Holocene sections of two ice cores: the Siple Dome ice core in Antarctica, and the Greenland Ice Sheet Project 2 (GISP2) ice core in Greenland. The measurements were made at Oregon State University between 2007 and 2009. Measurements were made relative to the NOAA04 methane concentration scale using a working standard internally calibrated to NOAA certified air standards. Concentrations are corrected for gravitational fractionation and solubility effects in the melt-refreeze extraction. Data are available via FTP in Microsoft Excel (.xls) format.", "east": -38.466667, "geometry": ["POINT(-38.466667 73.583333)", "POINT(-148.81 -81.65)"], "keywords": "Antarctica; Arctic; Chemistry:fluid; Chemistry:Fluid; Geochemistry; GISP2; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Paleoclimate; Siple Dome; Siple Dome Ice Core", "locations": "Arctic; Antarctica; Siple Dome", "north": 73.583333, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Brook, Edward J.", "project_titles": "Collaborative Research: New insights into the Holocene methane budget from dual isotope systematics and a high resolution record of the interpolar gradient", "projects": [{"proj_uid": "p0000131", "repository": "USAP-DC", "title": "Collaborative Research: New insights into the Holocene methane budget from dual isotope systematics and a high resolution record of the interpolar gradient"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core", "south": -81.65, "title": "Methane Measurements from the GISP2 and Siple Dome Ice Cores", "uid": "609440", "west": -148.81}, {"awards": "0440759 Sowers, Todd", "bounds_geometry": ["POINT(112.09 -79.47)"], "date_created": "Tue, 01 Dec 2009 00:00:00 GMT", "description": "This data set includes methane (CH4) isotope data from the West Antarctic Ice Sheet (WAIS) Divide ice core, WDC05A, in Antarctica. The data include depth, gas age, and the isotopic composition of methane (\u0026#8706;13C and \u0026#8706;D of CH4). The ice core was collected during the 2005-2006 Antarctic field season. The CH4 isotope data was generated in 2008 using wet extraction methodology. Samples span the last 1,000 years, at a resolution of about 15 years. Data for samples above 69 meters were from firn air, and data below 69 meters from ice. The dating of the ice was based on continuous chemical analyses above 69 meters and Electrical Conductivity/Dielectric Property (ECM/DEP) measurements from ice. Dating uncertainty is estimated to be better than five years.\n\nData are available via FTP in Microsoft Excel (.xls) tab delimited format", "east": 112.09, "geometry": ["POINT(112.09 -79.47)"], "keywords": "Antarctica; Chemistry:fluid; Chemistry:Fluid; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Isotope; Methane; Paleoclimate; WAIS Divide; WAIS Divide Ice Core", "locations": "Antarctica; WAIS Divide", "north": -79.47, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Sowers, Todd A.", "project_titles": "Collaborative Research: Gases in Firn Air and Shallow Ice at the Proposed WAIS Divide Drilling Site", "projects": [{"proj_uid": "p0000368", "repository": "USAP-DC", "title": "Collaborative Research: Gases in Firn Air and Shallow Ice at the Proposed WAIS Divide Drilling Site"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.47, "title": "Methane Isotopes from the WAIS Divide Ice Core", "uid": "609435", "west": 112.09}, {"awards": "0196105 Steig, Eric; 0440414 Steig, Eric", "bounds_geometry": ["POLYGON((-130 -65,-125.8 -65,-121.6 -65,-117.4 -65,-113.2 -65,-109 -65,-104.8 -65,-100.6 -65,-96.4 -65,-92.2 -65,-88 -65,-88 -67.5,-88 -70,-88 -72.5,-88 -75,-88 -77.5,-88 -80,-88 -82.5,-88 -85,-88 -87.5,-88 -90,-92.2 -90,-96.4 -90,-100.6 -90,-104.8 -90,-109 -90,-113.2 -90,-117.4 -90,-121.6 -90,-125.8 -90,-130 -90,-130 -87.5,-130 -85,-130 -82.5,-130 -80,-130 -77.5,-130 -75,-130 -72.5,-130 -70,-130 -67.5,-130 -65))"], "date_created": "Thu, 01 Oct 2009 00:00:00 GMT", "description": "This data set includes stable isotope measurements from snow pits, firn, and ice cores collected by the the US component of the International Trans-Antarctic Scientific Expedition ( ITASE). The ITASE program aims to collect and interpret a continental-wide array of environmental parameters assembled through the coordinated efforts of scientists from several nations.\n\nThese data were collected between 1999 and 2007. The data have been compiled into single files for each sampling site, though in some cases a file contains data from more than one ice core or snow pit. Each file in the data set includes deuterium/hydrogen (\u0026#948;D) and/or 18-oxygen/16-oxygen (\u0026#948;18O) ratios, depths, and in some cases ice age or other information. Further details regarding the data are provided in each data file. Data are available via FTP in ASCII text format (.txt). Data were collected during five Antarctic field seasons from 1999 to 2007. Data from 1999 to 2002 are currently available. Data from 2003 to 2007 will be added in the future.", "east": -88.0, "geometry": ["POINT(-109 -77.5)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Isotope; ITASE; Paleoclimate; WAIS", "locations": "Antarctica; WAIS", "north": -65.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Steig, Eric J.", "project_titles": "Stable Isotope Studies at West Antarctic ITASE Sites", "projects": [{"proj_uid": "p0000013", "repository": "USAP-DC", "title": "Stable Isotope Studies at West Antarctic ITASE Sites"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "ITASE", "south": -90.0, "title": "US ITASE Stable Isotope Data, Antarctica", "uid": "609425", "west": -130.0}, {"awards": "9615554 Fitzpatrick, Joan", "bounds_geometry": ["POINT(-148.816667 -80.666667)"], "date_created": "Thu, 03 Sep 2009 00:00:00 GMT", "description": "This data set contains high-resolution digital images of thin and thick sections cut from the 1003 meter Siple Dome A main ice core. The images are useful for crystal size and orientation analysis and bubble size, shape, distribution, and number density determinations.\u00a0The data set contains several generations of images, taken between June 1998 and May 2005. An accompanying spreadsheet contains creation date information for each file.\n\nThe data are available via FTP in Adobe Photoshop Document (.psd), and Tagged Image File (.tif) formats. Additional information is provided as a Microsoft Excel (.xls) spreadsheet.", "east": -148.816667, "geometry": ["POINT(-148.816667 -80.666667)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Photo/video; Photo/Video; Siple Dome; Siple Dome Ice Core", "locations": "Siple Dome; Antarctica", "north": -80.666667, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Alley, Richard; Fitzpatrick, Joan; Spencer, Matthew", "project_titles": "Digital Imaging for Ice Core Analysis", "projects": [{"proj_uid": "p0000011", "repository": "USAP-DC", "title": "Digital Imaging for Ice Core Analysis"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core", "south": -80.666667, "title": "Digital Imaging for Siple Dome Ice Core Analysis, Antarctica", "uid": "609413", "west": -148.816667}, {"awards": "0086645 Fountain, Andrew", "bounds_geometry": ["POLYGON((161.04 -77.3,161.239 -77.3,161.438 -77.3,161.637 -77.3,161.836 -77.3,162.035 -77.3,162.234 -77.3,162.433 -77.3,162.632 -77.3,162.831 -77.3,163.03 -77.3,163.03 -77.378,163.03 -77.456,163.03 -77.534,163.03 -77.612,163.03 -77.69,163.03 -77.768,163.03 -77.846,163.03 -77.924,163.03 -78.002,163.03 -78.08,162.831 -78.08,162.632 -78.08,162.433 -78.08,162.234 -78.08,162.035 -78.08,161.836 -78.08,161.637 -78.08,161.438 -78.08,161.239 -78.08,161.04 -78.08,161.04 -78.002,161.04 -77.924,161.04 -77.846,161.04 -77.768,161.04 -77.69,161.04 -77.612,161.04 -77.534,161.04 -77.456,161.04 -77.378,161.04 -77.3))"], "date_created": "Mon, 31 Aug 2009 00:00:00 GMT", "description": "As part of the Long Term Ecological Research (LTER) project in the McMurdo Dry Valleys of Antarctica, a systematic sampling program has been undertaken to monitor mass balance of the Taylor Valley glaciers. Data were collected from the Canada, Commonwealth, Howard, Hughes, Suess and Taylor glaciers, located in the Taylor Valley of Antarctica. Monitoring the changes in these measurements over time provides a record of mass balance, and aids in determining the role of glaciers in the polar hydrologic cycle.", "east": 163.03, "geometry": ["POINT(162.035 -77.69)"], "keywords": "Antarctica; Dry Valleys; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; LTER; LTER Mcmurdo Dry Valleys", "locations": "Antarctica; Dry Valleys", "north": -77.3, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Fountain, Andrew; Nylen, Thomas; Basagic, Hassan; Lyons, W. Berry; Langevin, Paul", "project_titles": "SGER Proposal:Glaciological change in the McMurdo Dry Valleys, Antarctica", "projects": [{"proj_uid": "p0000541", "repository": "USAP-DC", "title": "SGER Proposal:Glaciological change in the McMurdo Dry Valleys, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.08, "title": "McMurdo Dry Valleys Long-Term Ecological Research (MCM LTER) Core Glacier Mass Balance Data, Antarctica", "uid": "609421", "west": 161.04}, {"awards": "0440602 Saltzman, Eric", "bounds_geometry": ["POINT(112.09 -79.47)"], "date_created": "Thu, 30 Jul 2009 00:00:00 GMT", "description": "This data set contains trace gas measurements of air extracted from ice core samples from the West Antarctic Ice Sheet Divide A core (WAIS-D 05A). The WAIS A core was dry-drilled at the WAIS site during the 2005-2006 Antarctic field season. Data include trace gas species including ethane (C2H6), propane (C3H8), n-butane (n-C4H10), carbonyl sulfide (COS), carbon disulfide (CS2), methyl chloride (CH3Cl), methyl bromide (CH3Br), acetonitrile (CH3CN), and chlorofluorocarbon-12 (CFC-12), for 57 ice core samples. The data are available via FTP in Microsoft Excel (.xls) file format.", "east": 112.09, "geometry": ["POINT(112.09 -79.47)"], "keywords": "Antarctica; Atmosphere; Chemistry:fluid; Chemistry:Fluid; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Paleoclimate; Snow/ice; Snow/Ice; WAIS Divide; WAIS Divide Ice Core", "locations": "WAIS Divide; Antarctica", "north": -79.47, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Saltzman, Eric", "project_titles": "Collaborative Research: Gases in Firn Air and Shallow Ice at the Proposed WAIS Divide Drilling Site", "projects": [{"proj_uid": "p0000368", "repository": "USAP-DC", "title": "Collaborative Research: Gases in Firn Air and Shallow Ice at the Proposed WAIS Divide Drilling Site"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.47, "title": "Gases in Firn Air and Shallow Ice at the WAIS Drilling Site, Antarctica", "uid": "609412", "west": 112.09}, {"awards": "0125794 Price, P. Buford", "bounds_geometry": ["POINT(148.816667 -81.65)"], "date_created": "Wed, 29 Jul 2009 00:00:00 GMT", "description": "This data set contains high-resolution logs of dust and microbes measured at the Siple Dome A borehole in Antarctica. The data were obtained using a newly developed optical borehole logger, which fits into a fluid-filled borehole in glacial ice. It can detect dust and microbes in ice out to several meters from the borehole, and measure optical properties of those particles. The data set contains information on depth and optical signal. Data are available via FTP in data file format (.dat).", "east": 148.816667, "geometry": ["POINT(148.816667 -81.65)"], "keywords": "Antarctica; Dust; Geology/Geophysics - Other; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Microbiology; Optical Backscatter", "locations": "Antarctica", "north": -81.65, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Bay, Ryan", "project_titles": "Optical Logging for Dust and Microbes in Boreholes in Glacial Ice", "projects": [{"proj_uid": "p0000156", "repository": "USAP-DC", "title": "Optical Logging for Dust and Microbes in Boreholes in Glacial Ice"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -81.65, "title": "Optical Logging for Dust and Microbes in Boreholes in Glacial Ice", "uid": "609403", "west": 148.816667}, {"awards": "0440975 Severinghaus, Jeffrey", "bounds_geometry": ["POINT(-119.533333 -80.016667)"], "date_created": "Fri, 17 Jul 2009 00:00:00 GMT", "description": "This data set consists of Gas-isotopic data from the Siple Dome and and Greenland Ice Sheet Project 2 (GISP2) ice cores covering roughly the last 100,000 years (100 ka), consisting of d15N (15N/14N) of N2, d18O (18O/16O) of O2, dO2/N2, and dAr/N2. Derived parameters include d18Oatm, d15N, dO2/N2, and dAr/N2. \n\nData are available via FTP as ASCII text files (.txt) and Microsoft Excel files (.xls).", "east": -119.533333, "geometry": ["POINT(-119.533333 -80.016667)"], "keywords": "Antarctica; Arctic; Atmosphere; Byrd Glacier; Byrd Ice Core; Chemistry:fluid; Chemistry:Fluid; Geochemistry; GISP2; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Isotope; Paleoclimate; Siple Dome; Siple Dome Ice Core", "locations": "Siple Dome; Arctic; Antarctica; Byrd Glacier", "north": -80.016667, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Severinghaus, Jeffrey P.", "project_titles": "Nitrogen and oxygen gas isotopes in the Siple Dome and Byrd ice cores", "projects": [{"proj_uid": "p0000450", "repository": "USAP-DC", "title": "Nitrogen and oxygen gas isotopes in the Siple Dome and Byrd ice cores"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core", "south": -80.016667, "title": "Nitrogen and Oxygen Gas Isotopes in the Siple Dome and Byrd Ice Cores, Antarctica", "uid": "609407", "west": -119.533333}, {"awards": "0228052 Kreutz, Karl", "bounds_geometry": ["POLYGON((161.04 -77.3,161.239 -77.3,161.438 -77.3,161.637 -77.3,161.836 -77.3,162.035 -77.3,162.234 -77.3,162.433 -77.3,162.632 -77.3,162.831 -77.3,163.03 -77.3,163.03 -77.378,163.03 -77.456,163.03 -77.534,163.03 -77.612,163.03 -77.69,163.03 -77.768,163.03 -77.846,163.03 -77.924,163.03 -78.002,163.03 -78.08,162.831 -78.08,162.632 -78.08,162.433 -78.08,162.234 -78.08,162.035 -78.08,161.836 -78.08,161.637 -78.08,161.438 -78.08,161.239 -78.08,161.04 -78.08,161.04 -78.002,161.04 -77.924,161.04 -77.846,161.04 -77.768,161.04 -77.69,161.04 -77.612,161.04 -77.534,161.04 -77.456,161.04 -77.378,161.04 -77.3))"], "date_created": "Wed, 01 Jul 2009 00:00:00 GMT", "description": "This data set includes high-resolution ice core records from the Dry Valleys region of Antarctica, and provides interpretations of interannual to decadal-scale climate variability during the last 2000 years (late Holocene). Intermediate-length ice cores (100 to 200 meters) were drilled at four sites along transects in the Taylor and Wright valleys, and analyzed for stable isotopes and major ions. The data set includes high-resolution ice core data for each study site. It also includes mass balance, borehole temperature, and snowpit data for each site, and Global Positioning System (GPS) velocity data for some of the sites. Snow pit data from three additional sites in the same region is also available. Data are available via FTP, in Microsoft Excel (.xls), ASCII text (.txt), and Microsoft Word (.doc) file formats.", "east": 163.03, "geometry": ["POINT(162.035 -77.69)"], "keywords": "Antarctica; Borehole Temperature; Chemistry:ice; Chemistry:Ice; Dry Valleys; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Isotope; Mass Balance; Paleoclimate; Physical Properties", "locations": "Dry Valleys; Antarctica", "north": -77.3, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Kreutz, Karl; Mayewski, Paul A.", "project_titles": "Dry Valleys Late Holocene Climate Variability", "projects": [{"proj_uid": "p0000155", "repository": "USAP-DC", "title": "Dry Valleys Late Holocene Climate Variability"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.08, "title": "Late Holocene Climate Variability, Dry Valleys, Antarctica", "uid": "609399", "west": 161.04}, {"awards": "0122520 Gogineni, S. Prasad", "bounds_geometry": ["POLYGON((-110 -62,-105 -62,-100 -62,-95 -62,-90 -62,-85 -62,-80 -62,-75 -62,-70 -62,-65 -62,-60 -62,-60 -63.5,-60 -65,-60 -66.5,-60 -68,-60 -69.5,-60 -71,-60 -72.5,-60 -74,-60 -75.5,-60 -77,-65 -77,-70 -77,-75 -77,-80 -77,-85 -77,-90 -77,-95 -77,-100 -77,-105 -77,-110 -77,-110 -75.5,-110 -74,-110 -72.5,-110 -71,-110 -69.5,-110 -68,-110 -66.5,-110 -65,-110 -63.5,-110 -62))"], "date_created": "Wed, 01 Jul 2009 00:00:00 GMT", "description": "The Center for Remote Sensing of Ice Sheets (CReSIS) data from the 2002 and 2006 Flight missions.\n\nBasic Processing has been done to obtain the radar echograms and derived ice thickness data. Algorithms are being developed to reduce the multiples to obtain accurate measurement of ice sheet thickness over some areas. Data are available in Matlab (.mat) and Adobe .pdf formats.", "east": -60.0, "geometry": ["POINT(-85 -69.5)"], "keywords": "Airborne Radar; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Radar", "locations": "Antarctica", "north": -62.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Gogineni, Prasad", "project_titles": "ITR/SI+AP: A Mobile Sensor Web for Polar Ice Sheet Measurements", "projects": [{"proj_uid": "p0000583", "repository": "USAP-DC", "title": "ITR/SI+AP: A Mobile Sensor Web for Polar Ice Sheet Measurements"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.0, "title": "Antarctic Radar Echograms and Derived Ice Thickness Data from CReSIS", "uid": "609414", "west": -110.0}, {"awards": "9814810 Bales, Roger", "bounds_geometry": ["POLYGON((-124 -76,-120 -76,-116 -76,-112 -76,-108 -76,-104 -76,-100 -76,-96 -76,-92 -76,-88 -76,-84 -76,-84 -77.4,-84 -78.8,-84 -80.2,-84 -81.6,-84 -83,-84 -84.4,-84 -85.8,-84 -87.2,-84 -88.6,-84 -90,-88 -90,-92 -90,-96 -90,-100 -90,-104 -90,-108 -90,-112 -90,-116 -90,-120 -90,-124 -90,-124 -88.6,-124 -87.2,-124 -85.8,-124 -84.4,-124 -83,-124 -81.6,-124 -80.2,-124 -78.8,-124 -77.4,-124 -76))"], "date_created": "Tue, 16 Jun 2009 00:00:00 GMT", "description": "This data set contains atmospheric mixing ratios of hydrogen peroxide and methylhydroperoxide at 21 sites on the West Antarctic Ice Sheet (WAIS) were obtained from 2000 to 2003 during the US International Trans-Antarctic Scientific Expedition (US ITASE) deployments. Sample location from the WAIS region (76-90\u00baS / 84-124\u00baW) were approximately 100-300 km apart and correspond to US ITASE ice core sites. At each site, ambient air from 1 m above the snow surface was sampled between two to five days. Atmospheric hydroperoxides (ROOH) were continuously scrubbed from the sample air with a glass coil scrubber and subsequently quantified using a fluorescence detection method.\n\nData are available via FTP as ASCII text files (.txt).", "east": -84.0, "geometry": ["POINT(-104 -83)"], "keywords": "Antarctica; Atmosphere; Chemistry:fluid; Chemistry:Fluid; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; ITASE; WAIS", "locations": "WAIS; Antarctica", "north": -76.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "McConnell, Joseph; Bales, Roger; Frey, Markus", "project_titles": "Hydrogen Peroxide, Formaldehyde, and Sub-Annual Snow Accumulation in West Antarctica: Participation in West Antarctic Traverse", "projects": [{"proj_uid": "p0000253", "repository": "USAP-DC", "title": "Hydrogen Peroxide, Formaldehyde, and Sub-Annual Snow Accumulation in West Antarctica: Participation in West Antarctic Traverse"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Atmospheric Mixing Ratios of Hydroperoxides above the West Antarctic Ice Sheet", "uid": "609394", "west": -124.0}, {"awards": "9814810 Bales, Roger", "bounds_geometry": ["POLYGON((-124 -76,-120 -76,-116 -76,-112 -76,-108 -76,-104 -76,-100 -76,-96 -76,-92 -76,-88 -76,-84 -76,-84 -77.4,-84 -78.8,-84 -80.2,-84 -81.6,-84 -83,-84 -84.4,-84 -85.8,-84 -87.2,-84 -88.6,-84 -90,-88 -90,-92 -90,-96 -90,-100 -90,-104 -90,-108 -90,-112 -90,-116 -90,-120 -90,-124 -90,-124 -88.6,-124 -87.2,-124 -85.8,-124 -84.4,-124 -83,-124 -81.6,-124 -80.2,-124 -78.8,-124 -77.4,-124 -76))"], "date_created": "Mon, 01 Jun 2009 00:00:00 GMT", "description": "This data set contains sub-annually resolved concentrations of hydrogen peroxide (H2O2), snow, firn and ice from 23 sites on the West Antarctic Ice Sheet (WAIS).", "east": -84.0, "geometry": ["POINT(-104 -83)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Paleoclimate; WAIS", "locations": "WAIS; Antarctica", "north": -76.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "McConnell, Joseph; Bales, Roger; Frey, Markus", "project_titles": "Hydrogen Peroxide, Formaldehyde, and Sub-Annual Snow Accumulation in West Antarctica: Participation in West Antarctic Traverse", "projects": [{"proj_uid": "p0000253", "repository": "USAP-DC", "title": "Hydrogen Peroxide, Formaldehyde, and Sub-Annual Snow Accumulation in West Antarctica: Participation in West Antarctic Traverse"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Twenty-Three Century-scale Ice Core Records of Hydrogen Peroxide (H2O2) from West Antarctica", "uid": "609392", "west": -124.0}, {"awards": "0632168 Hulbe, Christina", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Sat, 30 May 2009 00:00:00 GMT", "description": "This data set provides the results of predictive modeling experiments on the Amundsen Sea Embayment region of Antarctica. The models examine how interactions between basal processes and ice sheet dynamics can result in abrupt reconfigurations of ice-sheets, and how those reconfigurations impact other Earth systems. The models were developed by a collaborative effort called the Community Ice Sheet Model (CISM).\n\nThe data set contains a MATLAB (.mat) native format file with time evolution of basal temperature fields from a generic ice sheet model with uniform and non-uniform heat flux, a MATLAB script for performing singular value decomposition and analysis of the model fields, and a summary of experimental results in Portable Document Format (.pdf). Data are available via FTP.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Community Ice Sheet Model; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Hulbe, Christina; Daescu, Dacian N.", "project_titles": "Collaborative Research: IPY, The Next Generation: A Community Ice Sheet Model for Scientists and Educators With Demonstration Experiments in Amundsen Sea Embayment Region", "projects": [{"proj_uid": "p0000756", "repository": "USAP-DC", "title": "Collaborative Research: IPY, The Next Generation: A Community Ice Sheet Model for Scientists and Educators With Demonstration Experiments in Amundsen Sea Embayment Region"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Singular Value Decomposition Analysis of Ice Sheet Model Output Fields", "uid": "609396", "west": -180.0}, {"awards": "0439759 Ballard, Grant", "bounds_geometry": ["POINT(166 -77)"], "date_created": "Tue, 19 May 2009 00:00:00 GMT", "description": "This project is an international collaborative investigation of geographic structuring, founding of new colonies, and population change of Adelie penguins (Pygoscelis adelia) nesting on Ross and Beaufort islands, Antarctica. This ongoing study will continue to consider the relative importance of resources that constrain or enhance colony growth (nesting habitat, access to food); the aspects of natural history that are affected by exploitative or interference competition among neighboring colonies (breeding success, foraging effort); climatic factors that influence the latter, especially sea ice patterns; and behavioral mechanisms that influence colony growth as a function of initial size and location (emigration, immigration). The research includes a census of known-age penguins, studies of foraging effort and overlap among colonies; and identification of the location of molting and wintering areas. ", "east": 166.0, "geometry": ["POINT(166 -77)"], "keywords": null, "locations": null, "north": -77.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Ballard, Grant", "project_titles": "COLLABORATIVE: Adelie Penguin Response to Climate Change at the Individual, Colony and Metapopulation Levels", "projects": [{"proj_uid": "p0000318", "repository": "USAP-DC", "title": "COLLABORATIVE: Adelie Penguin Response to Climate Change at the Individual, Colony and Metapopulation Levels"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.0, "title": "Adelie penguin weighbridge data 1994-2009 from the California Avian Data Center hosted by Point Reyes Bird Observatory Conservation Science", "uid": "600014", "west": 166.0}, {"awards": "0439759 Ballard, Grant", "bounds_geometry": ["POINT(166 -77)"], "date_created": "Tue, 19 May 2009 00:00:00 GMT", "description": "This project is an international collaborative investigation of geographic structuring, founding of new colonies, and population change of Adelie penguins (Pygoscelis adelia) nesting on Ross and Beaufort islands, Antarctica. 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", "east": 166.0, "geometry": ["POINT(166 -77)"], "keywords": null, "locations": null, "north": -77.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Ballard, Grant", "project_titles": "COLLABORATIVE: Adelie Penguin Response to Climate Change at the Individual, Colony and Metapopulation Levels", "projects": [{"proj_uid": "p0000318", "repository": "USAP-DC", "title": "COLLABORATIVE: Adelie Penguin Response to Climate Change at the Individual, Colony and Metapopulation Levels"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.0, "title": "Daily weather observations 1996-2009 from the California Avian Data Center hosted by Point Reyes Bird Observatory Conservation Science", "uid": "600015", "west": 166.0}, {"awards": "0439759 Ballard, Grant", "bounds_geometry": ["POINT(166 -77)"], "date_created": "Tue, 19 May 2009 00:00:00 GMT", "description": "This project is an international collaborative investigation of geographic structuring, founding of new colonies, and population change of Adelie penguins (Pygoscelis adelia) nesting on Ross and Beaufort islands, Antarctica. 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", "east": 166.0, "geometry": ["POINT(166 -77)"], "keywords": null, "locations": null, "north": -77.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Ballard, Grant", "project_titles": "COLLABORATIVE: Adelie Penguin Response to Climate Change at the Individual, Colony and Metapopulation Levels", "projects": [{"proj_uid": "p0000318", "repository": "USAP-DC", "title": "COLLABORATIVE: Adelie Penguin Response to Climate Change at the Individual, Colony and Metapopulation Levels"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.0, "title": "Adelie penguin dive data 1999-2009 from the California Avian Data Center hosted by Point Reyes Bird Observatory Conservation Science", "uid": "600013", "west": 166.0}, {"awards": "0439759 Ballard, Grant", "bounds_geometry": ["POINT(166 -77)"], "date_created": "Tue, 19 May 2009 00:00:00 GMT", "description": "This project is an international collaborative investigation of geographic structuring, founding of new colonies, and population change of Adelie penguins (Pygoscelis adelia) nesting on Ross and Beaufort islands, Antarctica. 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", "east": 166.0, "geometry": ["POINT(166 -77)"], "keywords": null, "locations": null, "north": -77.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Ballard, Grant", "project_titles": "COLLABORATIVE: Adelie Penguin Response to Climate Change at the Individual, Colony and Metapopulation Levels", "projects": [{"proj_uid": "p0000318", "repository": "USAP-DC", "title": "COLLABORATIVE: Adelie Penguin Response to Climate Change at the Individual, Colony and Metapopulation Levels"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.0, "title": "Adelie penguin banding data 1994-2009 from the California Avian Data Center hosted by Point Reyes Bird Observatory Conservation Science", "uid": "600005", "west": 166.0}, {"awards": "0439759 Ballard, Grant", "bounds_geometry": ["POINT(166 -77)"], "date_created": "Tue, 19 May 2009 00:00:00 GMT", "description": "This project is an international collaborative investigation of geographic structuring, founding of new colonies, and population change of Adelie penguins (Pygoscelis adelia) nesting on Ross and Beaufort islands, Antarctica. 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", "east": 166.0, "geometry": ["POINT(166 -77)"], "keywords": null, "locations": null, "north": -77.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Ballard, Grant", "project_titles": "COLLABORATIVE: Adelie Penguin Response to Climate Change at the Individual, Colony and Metapopulation Levels", "projects": [{"proj_uid": "p0000318", "repository": "USAP-DC", "title": "COLLABORATIVE: Adelie Penguin Response to Climate Change at the Individual, Colony and Metapopulation Levels"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.0, "title": "Adelie penguin chick measurements 1996 - 2009 from the California Avian Data Center hosted by Point Reyes Bird Observatory Conservation Science", "uid": "600006", "west": 166.0}, {"awards": "0439759 Ballard, Grant", "bounds_geometry": ["POINT(166 -77)"], "date_created": "Tue, 19 May 2009 00:00:00 GMT", "description": "This project is an international collaborative investigation of geographic structuring, founding of new colonies, and population change of Adelie penguins (Pygoscelis adelia) nesting on Ross and Beaufort islands, Antarctica. This ongoing study will continue to consider the relative importance of resources that constrain or enhance colony growth (nesting habitat, access to food); the aspects of natural history that are affected by exploitative or interference competition among neighboring colonies (breeding success, foraging effort); climatic factors that influence the latter, especially sea ice patterns; and behavioral mechanisms that influence colony growth as a function of initial size and location (emigration, immigration). The research includes a census of known-age penguins, studies of foraging effort and overlap among colonies; and identification of the location of molting and wintering areas. ", "east": 166.0, "geometry": ["POINT(166 -77)"], "keywords": "Biota", "locations": null, "north": -77.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Ballard, Grant", "project_titles": "COLLABORATIVE: Adelie Penguin Response to Climate Change at the Individual, Colony and Metapopulation Levels", "projects": [{"proj_uid": "p0000318", "repository": "USAP-DC", "title": "COLLABORATIVE: Adelie Penguin Response to Climate Change at the Individual, Colony and Metapopulation Levels"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.0, "title": "Adelie penguin chick counts 1997-2009 from the California Avian Data Center hosted by Point Reyes Bird Observatory Conservation Science", "uid": "600007", "west": 166.0}, {"awards": "0439759 Ballard, Grant", "bounds_geometry": ["POINT(166 -77)"], "date_created": "Tue, 19 May 2009 00:00:00 GMT", "description": "This project is an international collaborative investigation of geographic structuring, founding of new colonies, and population change of Adelie penguins (Pygoscelis adelia) nesting on Ross and Beaufort islands, Antarctica. This ongoing study will continue to consider the relative importance of resources that constrain or enhance colony growth (nesting habitat, access to food); the aspects of natural history that are affected by exploitative or interference competition among neighboring colonies (breeding success, foraging effort); climatic factors that influence the latter, especially sea ice patterns; and behavioral mechanisms that influence colony growth as a function of initial size and location (emigration, immigration). The research includes a census of known-age penguins, studies of foraging effort and overlap among colonies; and identification of the location of molting and wintering areas. ", "east": 166.0, "geometry": ["POINT(166 -77)"], "keywords": null, "locations": null, "north": -77.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Ballard, Grant", "project_titles": "COLLABORATIVE: Adelie Penguin Response to Climate Change at the Individual, Colony and Metapopulation Levels", "projects": [{"proj_uid": "p0000318", "repository": "USAP-DC", "title": "COLLABORATIVE: Adelie Penguin Response to Climate Change at the Individual, Colony and Metapopulation Levels"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.0, "title": "Adelie penguin diet data 1996 - 2009 from the California Avian Data Center hosted by Point Reyes Bird Observatory Conservation Science", "uid": "600008", "west": 166.0}, {"awards": "0439759 Ballard, Grant", "bounds_geometry": ["POINT(166 -77)"], "date_created": "Tue, 19 May 2009 00:00:00 GMT", "description": "This project is an international collaborative investigation of geographic structuring, founding of new colonies, and population change of Adelie penguins (Pygoscelis adelia) nesting on Ross and Beaufort islands, Antarctica. This ongoing study will continue to consider the relative importance of resources that constrain or enhance colony growth (nesting habitat, access to food); the aspects of natural history that are affected by exploitative or interference competition among neighboring colonies (breeding success, foraging effort); climatic factors that influence the latter, especially sea ice patterns; and behavioral mechanisms that influence colony growth as a function of initial size and location (emigration, immigration). The research includes a census of known-age penguins, studies of foraging effort and overlap among colonies; and identification of the location of molting and wintering areas. ", "east": 166.0, "geometry": ["POINT(166 -77)"], "keywords": null, "locations": null, "north": -77.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Ballard, Grant", "project_titles": "COLLABORATIVE: Adelie Penguin Response to Climate Change at the Individual, Colony and Metapopulation Levels", "projects": [{"proj_uid": "p0000318", "repository": "USAP-DC", "title": "COLLABORATIVE: Adelie Penguin Response to Climate Change at the Individual, Colony and Metapopulation Levels"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.0, "title": "Adelie penguin Geolocation Sensor data 2003-2007 from the California Avian Data Center hosted by Point Reyes Bird Observatory Conservation Science", "uid": "600009", "west": 166.0}, {"awards": "0439759 Ballard, Grant", "bounds_geometry": ["POINT(166 -77)"], "date_created": "Tue, 19 May 2009 00:00:00 GMT", "description": "This project is an international collaborative investigation of geographic structuring, founding of new colonies, and population change of Adelie penguins (Pygoscelis adelia) nesting on Ross and Beaufort islands, Antarctica. This ongoing study will continue to consider the relative importance of resources that constrain or enhance colony growth (nesting habitat, access to food); the aspects of natural history that are affected by exploitative or interference competition among neighboring colonies (breeding success, foraging effort); climatic factors that influence the latter, especially sea ice patterns; and behavioral mechanisms that influence colony growth as a function of initial size and location (emigration, immigration). The research includes a census of known-age penguins, studies of foraging effort and overlap among colonies; and identification of the location of molting and wintering areas. ", "east": 166.0, "geometry": ["POINT(166 -77)"], "keywords": null, "locations": null, "north": -77.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Ballard, Grant", "project_titles": "COLLABORATIVE: Adelie Penguin Response to Climate Change at the Individual, Colony and Metapopulation Levels", "projects": [{"proj_uid": "p0000318", "repository": "USAP-DC", "title": "COLLABORATIVE: Adelie Penguin Response to Climate Change at the Individual, Colony and Metapopulation Levels"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.0, "title": "Adelie penguin satellite position data 2000-2009 from the California Avian Data Center hosted by Point Reyes Bird Observatory Conservation Science", "uid": "600012", "west": 166.0}, {"awards": "0439759 Ballard, Grant", "bounds_geometry": ["POINT(166 -77)"], "date_created": "Tue, 19 May 2009 00:00:00 GMT", "description": "This project is an international collaborative investigation of geographic structuring, founding of new colonies, and population change of Adelie penguins (Pygoscelis adelia) nesting on Ross and Beaufort islands, Antarctica. This ongoing study will continue to consider the relative importance of resources that constrain or enhance colony growth (nesting habitat, access to food); the aspects of natural history that are affected by exploitative or interference competition among neighboring colonies (breeding success, foraging effort); climatic factors that influence the latter, especially sea ice patterns; and behavioral mechanisms that influence colony growth as a function of initial size and location (emigration, immigration). The research includes a census of known-age penguins, studies of foraging effort and overlap among colonies; and identification of the location of molting and wintering areas. ", "east": 166.0, "geometry": ["POINT(166 -77)"], "keywords": "Biota; Oceans", "locations": null, "north": -77.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Ballard, Grant", "project_titles": "COLLABORATIVE: Adelie Penguin Response to Climate Change at the Individual, Colony and Metapopulation Levels", "projects": [{"proj_uid": "p0000318", "repository": "USAP-DC", "title": "COLLABORATIVE: Adelie Penguin Response to Climate Change at the Individual, Colony and Metapopulation Levels"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.0, "title": "Leopard Seal counts 1997-2009 from the California Avian Data Center hosted by Point Reyes Bird Observatory Conservation Science", "uid": "600010", "west": 166.0}, {"awards": "0439759 Ballard, Grant", "bounds_geometry": ["POINT(166 -77)"], "date_created": "Tue, 19 May 2009 00:00:00 GMT", "description": "This project is an international collaborative investigation of geographic structuring, founding of new colonies, and population change of Adelie penguins (Pygoscelis adelia) nesting on Ross and Beaufort islands, Antarctica. This ongoing study will continue to consider the relative importance of resources that constrain or enhance colony growth (nesting habitat, access to food); the aspects of natural history that are affected by exploitative or interference competition among neighboring colonies (breeding success, foraging effort); climatic factors that influence the latter, especially sea ice patterns; and behavioral mechanisms that influence colony growth as a function of initial size and location (emigration, immigration). The research includes a census of known-age penguins, studies of foraging effort and overlap among colonies; and identification of the location of molting and wintering areas. ", "east": 166.0, "geometry": ["POINT(166 -77)"], "keywords": null, "locations": null, "north": -77.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Ballard, Grant", "project_titles": "COLLABORATIVE: Adelie Penguin Response to Climate Change at the Individual, Colony and Metapopulation Levels", "projects": [{"proj_uid": "p0000318", "repository": "USAP-DC", "title": "COLLABORATIVE: Adelie Penguin Response to Climate Change at the Individual, Colony and Metapopulation Levels"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.0, "title": "Adelie penguin resighting data 1997-2009 from the California Avian Data Center hosted by Point Reyes Bird Observatory Conservation Science", "uid": "600011", "west": 166.0}, {"awards": "0337567 Jacobel, Robert", "bounds_geometry": ["POLYGON((-140 -82,-139 -82,-138 -82,-137 -82,-136 -82,-135 -82,-134 -82,-133 -82,-132 -82,-131 -82,-130 -82,-130 -82.1,-130 -82.2,-130 -82.3,-130 -82.4,-130 -82.5,-130 -82.6,-130 -82.7,-130 -82.8,-130 -82.9,-130 -83,-131 -83,-132 -83,-133 -83,-134 -83,-135 -83,-136 -83,-137 -83,-138 -83,-139 -83,-140 -83,-140 -82.9,-140 -82.8,-140 -82.7,-140 -82.6,-140 -82.5,-140 -82.4,-140 -82.3,-140 -82.2,-140 -82.1,-140 -82))"], "date_created": "Thu, 26 Mar 2009 00:00:00 GMT", "description": "This data set contains radar data from the Kamb Ice Stream (KIS), formerly known as Ice Stream C, in West Antarctica. The project was part of a larger study to assess the likelihood of ice stream reactivation. Parameters include latitude, longitude, distance along profile, ice thickness pick, bright layer depth, and surface elevation, from approximately 1600 km of ground-based radar traverses recorded during the 2004 and 2005 Antarctic field seasons.\n\nData are available via FTP as ASCII text files (.txt). Profile location maps and sample profile sections are available as Joint Photographic Experts Group (.jpg) image files. The data are also available as binary data on DVD, upon request.", "east": -130.0, "geometry": ["POINT(-135 -82.5)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Kamb Ice Stream", "locations": "Antarctica; Kamb Ice Stream", "north": -82.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Jacobel, Robert", "project_titles": "Collaborative Research: Is Ice Stream C Restarting? Glaciological Investigations of the \u0027Bulge\u0027 and the Trunk of Ice Stream C, West Antartica", "projects": [{"proj_uid": "p0000192", "repository": "USAP-DC", "title": "Collaborative Research: Is Ice Stream C Restarting? Glaciological Investigations of the \u0027Bulge\u0027 and the Trunk of Ice Stream C, West Antartica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -83.0, "title": "Glaciological Investigations of the Bulge and Trunk of Kamb Ice Stream, West Antarctica", "uid": "609380", "west": -140.0}, {"awards": null, "bounds_geometry": null, "date_created": "Thu, 26 Mar 2009 00:00:00 GMT", "description": "Radium and Thorium isotope data summaries from AMLR and NBP cruises to the Antarctic in 2006 Naturally occurring radium isotopes (224Ra, 226Ra, 228Ra) were used in determining lateral mixing processes which are reported in dpm/m3. Particulate organic Carbon (POC) flux was determined through measuring Thorium (234Th) reported in dpm/kg. \n\nCruises \n AMLR (Antarctic Marine Living Resources) R/V Yuzhmorgeologiya Jan/2006: \n The research program was focused in the southern Drake Passage along the Shackelton Shelf located near the Bransfield Strait. Samples were obtained from the R/V Yuzhmorgeologiya and inflatables that were taken to island locations. \n \n Lat/Lon Bounding Box \n -62.2538Lat, -62.9966Lon \n -63.2335Lat, -59.0332Lon \n -59.9964Lat, -55.7612Lon \n -61.4995Lat, -53.9996Lon \n \n NBP (Nathaniel B. Palmer) R/V Nathaniel B. Palmer July/2006: \n The research was conducted in the same region of the Drake Passage as the AMLR cruise. Samples were obtained aboard the R/V Nathaniel B. Palmer \n \n Lat/Lon bounding box \n -60.4991Lat, -58.5613Lon \n -62.3599Lat, -58.0392Lon \n -60.2783Lat, -57.4509Lon \n -61.2683Lat, -54.2852Lon ", "east": null, "geometry": null, "keywords": null, "locations": null, "north": null, "nsf_funding_programs": null, "persons": null, "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": null, "title": "Radium and Thorium isotope data summaries from AMLR and NBP cruises to the Antarctic in 2006", "uid": "600003", "west": null}, {"awards": "9319379 Blankenship, Donald; 9911617 Blankenship, Donald", "bounds_geometry": ["POLYGON((-160 -70,-142.5 -70,-125 -70,-107.5 -70,-90 -70,-72.5 -70,-55 -70,-37.5 -70,-20 -70,-2.5 -70,15 -70,15 -72,15 -74,15 -76,15 -78,15 -80,15 -82,15 -84,15 -86,15 -88,15 -90,-2.5 -90,-20 -90,-37.5 -90,-55 -90,-72.5 -90,-90 -90,-107.5 -90,-125 -90,-142.5 -90,-160 -90,-160 -88,-160 -86,-160 -84,-160 -82,-160 -80,-160 -78,-160 -76,-160 -74,-160 -72,-160 -70))"], "date_created": "Fri, 06 Feb 2009 00:00:00 GMT", "description": "This data set is an Antarctic radar-based subglacial lake classification collection, which focuses on the radar reflection properties of each given lake.\n\nThe Subglacial lakes are separated into four categories specified by radar reflection properties. Additional information includes: latitude, longitude, length (in kilometers), hydro-potential (in meters), bed elevation (in meters above WGS84), and ice thickness (in meters).\n\nSource data used to compile this data set were collected between 1998 and 2001. Data are available via FTP as a Microsoft Excel Spreadsheet (XLS), and Tagged Image File Format (TIF).", "east": 15.0, "geometry": ["POINT(-72.5 -80)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Subglacial Lake", "locations": "Antarctica", "north": -70.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Blankenship, Donald D.; Holt, John W.; Carter, Sasha P.", "project_titles": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR)", "projects": [{"proj_uid": "p0000125", "repository": "USAP-DC", "title": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Antarctic Subglacial Lake Classification Inventory", "uid": "609336", "west": -160.0}, {"awards": "0338342 Foreman, Christine; 0338260 Chin, Yu-Ping", "bounds_geometry": ["POINT(166.167 -77.55)"], "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "Dissolved organic matter (DOM) is a significant chemical component in aquatic systems because it acts as an important carbon source for microorganisms, absorbs harmful radiation in sunlight, is able to complex metals, and can participate in important biogeochemical reactions. This study will investigate the biogeochemical cycling of DOM in a small coastal Antarctic pond, Pony Lake, located on Cape Royds, Ross Island. Because there are no higher plants present at this site all of the DOM in this lake is derived from microorganisms. Thus, Pony Lake is an ideal site to study the effect of physical, chemical, and microbial processes on the composition and character of the DOM pool. Finally, Pony Lake is also an ideal site to collect an International Humic Substances Society (IHSS) fulvic acid standard. Unlike other IHSS standards, this standard will not contain DOM components derived from higher land plants. To better understand the role of physical influences, the project will study the changes in the DOM pool as the lake evolves from ice-covered to ice-free conditions during the summer, as well as the relationship of DOM to the observed turnover of dominant microbial communities in the lake. Scientists will also monitor changes in microbial abundance, diversity, and productivity that may occur during the ice to open-water transition period. This research will provide much needed information regarding the relationship between microbial diversity and DOM biogeochemistry. Middle school science students will be active participants in this project through the Internet, while scientists are in the field, and in the lab.", "east": 166.167, "geometry": ["POINT(166.167 -77.55)"], "keywords": "Antarctica; Chemistry:fluid; Chemistry:Fluid; Critical Zone; Ross Island; Sample/collection Description; Sample/Collection Description; Water Samples", "locations": "Ross Island; Antarctica", "north": -77.55, "nsf_funding_programs": null, "persons": "Chin, Yu-Ping; Foreman, Christine", "project_titles": "Collaborative Research: Biogeochemistry of Dissolved Organic Matter in Pony Lake, Ross Island", "projects": [{"proj_uid": "p0000548", "repository": "USAP-DC", "title": "Collaborative Research: Biogeochemistry of Dissolved Organic Matter in Pony Lake, Ross Island"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.55, "title": "Biogeochemistry of Dissolved Organic Matter in Pony Lake, Ross Island", "uid": "600168", "west": 166.167}, {"awards": "0816934 Thomson, Stuart", "bounds_geometry": ["POLYGON((65 -66,72.9 -66,80.8 -66,88.7 -66,96.6 -66,104.5 -66,112.4 -66,120.3 -66,128.2 -66,136.1 -66,144 -66,144 -66.3,144 -66.6,144 -66.9,144 -67.2,144 -67.5,144 -67.8,144 -68.1,144 -68.4,144 -68.7,144 -69,136.1 -69,128.2 -69,120.3 -69,112.4 -69,104.5 -69,96.6 -69,88.7 -69,80.8 -69,72.9 -69,65 -69,65 -68.7,65 -68.4,65 -68.1,65 -67.8,65 -67.5,65 -67.2,65 -66.9,65 -66.6,65 -66.3,65 -66))"], "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "This Small Grant for Exploratory Research investigates the origin and evolution of the Gamburtsev subglacial mountains (GSM). These mountains are considered the nucleation point for Antarctica\u0027s largest ice sheets; however, being of indeterminate age, they may postdate ice sheet formation. As well, their formation could reflect tectonic events during the breakup of Gondwana. The project studies GSM-derived detrital zircon and apatite crystals from Prydz Bay obtained by the Ocean Drilling Program. Analytical work includes triple-dating thermochronometry by U/Pb, fission track, and (U/Th)/He methods. The combined technique offers insight into both high and low temperature processes, and is potentially sensitive to both the orogenic events and the subsequent cooling and exhumation due to erosion. In terms of broader impacts, this project supports research for a postdoctoral fellow.", "east": 144.0, "geometry": ["POINT(104.5 -67.5)"], "keywords": "Antarctica; Fission Track Thermochronology; Gamburtsev Mountains; Geochronology; Solid Earth", "locations": "Gamburtsev Mountains; Antarctica", "north": -66.0, "nsf_funding_programs": null, "persons": "Thomson, Stuart", "project_titles": "Collaborative Research: SGER: Triple-dating (Pb-FT-He) of Antarctic Detritus and the Origin of the Gamburtsev Mountains", "projects": [{"proj_uid": "p0000210", "repository": "USAP-DC", "title": "Collaborative Research: SGER: Triple-dating (Pb-FT-He) of Antarctic Detritus and the Origin of the Gamburtsev Mountains"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -69.0, "title": "Triple-dating (Pb-FT-He) of Antarctic Detritus and the Origin of the Gamburtsev Mountains", "uid": "600089", "west": 65.0}, {"awards": "0436190 Eastman, Joseph", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "Patterns of biodiversity, as revealed by basic research in organismal biology, may be derived from ecological and evolutionary processes expressed in unique settings, such as Antarctica. The polar regions and their faunas are commanding increased attention as declining species diversity, environmental change, commercial fisheries, and resource management are now being viewed in a global context. Commercial fishing is known to have a direct and pervasive effect on marine biodiversity, and occurs in the Southern Ocean as far south as the Ross Sea. The nature of fish biodiversity in the Antarctic is different than in all other ocean shelf areas. Waters of the Antarctic continental shelf are ice covered for most of the year and water temperatures are nearly constant at -1.5 C. In these waters components of the phyletically derived Antarctic clade of Notothenioids dominate fish diversity. In some regions, including the southwestern Ross Sea, Notothenioids are overwhelmingly dominant in terms of number of species, abundance, and biomass. Such dominance by a single taxonomic group is unique among shelf faunas of the world. In the absence of competition from a taxonomically diverse fauna, Notothenioids underwent a habitat or depth related diversification keyed to the utilization of unfilled niches in the water column, especially pelagic or partially pelagic zooplanktivory and piscivory. This has been accomplished in the absence of a swim bladder for buoyancy control. They also may form a special type of adaptive radiation known as a species flock, which is an assemblage of a disproportionately high number of related species that have evolved rapidly within a defined area where most species are endemic. Diversification in buoyancy is the hallmark of the notothenioid radiation. Buoyancy is the feature of notothenioid biology that determines whether a species lives on the substrate, in the water column or both. Buoyancy also influences other key aspects of life history including swimming, feeding and reproduction and thus has implications for the role of the species in the ecosystem. With similarities to classic evolutionary hot spots, the Antarctic shelf and its Notothenioid radiation merit further exploration. The 2004 \u0027International Collaborative Expedition to collect and study Fish Indigenous to Sub-Antarctic Habitats,\u0027 or, \u0027ICEFISH,\u0027 provided a platform for collection of notothenioid fishes from sub-Antarctic waters between South America and Africa, which will be examined in this project. This study will determine buoyancy for samples of all notothenioid species captured during the ICEFISH cruise. This essential aspect of the biology is known for only 19% of the notothenioid fauna. Also, the gross and microscopic anatomy of brains and sense organs of the phyletically basal families Bovichtidae, Eleginopidae, and of the non-Antarctic species of the primarily Antarctic family Nototheniidae will be examined. The fish biodiversity and endemicity in poorly known localities along the ICEFISH cruise track, seamounts and deep trenches will be quantified. Broader impacts include improved information for comprehending and conserving biodiversity, a scientific and societal priority.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Biota; NBP0404; Oceans; R/v Nathaniel B. Palmer; Southern Ocean", "locations": "Southern Ocean", "north": -60.0, "nsf_funding_programs": null, "persons": "Eastman, Joseph", "project_titles": "Biodiversity, Buoyancy and Morphological Studies of Non-Antarctic Notothenioid Fishes", "projects": [{"proj_uid": "p0000106", "repository": "USAP-DC", "title": "Biodiversity, Buoyancy and Morphological Studies of Non-Antarctic Notothenioid Fishes"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Biodiversity, Buoyancy and Morphological Studies of Non-Antarctic Notothenioid Fishes", "uid": "600038", "west": -180.0}, {"awards": "0437887 Sidell, Bruce", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "The polar ocean presently surrounding Antarctica is the coldest, most thermally stable marine environment on earth. Because oxygen solubility in seawater is inversely proportional to temperature, the cold Antarctic seas are an exceptionally oxygen-rich aquatic habitat. Eight families of a single perciform suborder, the Notothenioidei, dominate the present fish fauna surrounding Antarctica. Notothenioids account for approximately 35% of fish species and 90% of fish biomass south of the Antarctic Polar Front. Radiation of closely related notothenioid species thus has occurred rapidly and under a very unusual set of conditions: relative oceanographic isolation from other faunas due to circumpolar currents and deep ocean trenches surrounding the continent, chronically, severely cold water temperatures, very high oxygen availability, very low levels of niche competition in a Southern Ocean depauperate of species subsequent to a dramatic crash in species diversity of fishes that occurred sometime between the mid-Tertiary and present. These features make Antarctic notothenioid fishes an uniquely attractive group for the study of physiological and biochemical adaptations to cold body temperature. Few distinctive features of Antarctic fishes are as unique as the pattern of expression of oxygen-binding proteins in one notothenioid family, the Channichthyidae (Antarctic icefishes). All channichthyid icefishes lack the circulating oxygen-binding protein, hemoglobin (Hb); the intracellular oxygen-binding protein, myoglobin (Mb) is not uniformly expressed in species of this family. Both proteins are normally considered essential for adequate delivery of oxygen to aerobically poised tissues of animals. To compensate for the absence of Hb, icefishes have developed large hearts, rapidly circulate a large blood volume and possess elaborate vasculature of larger lumenal diameter than is seen in red-blooded fishes. Loss of Mb expression in oxidative muscles correlates with dramatic elevation in density of mitochondria within the cell, although each individual organelle is less densely packed with respiratory proteins. Within the framework of oxygen movement, the adaptive significance of greater vascular density and mitochondrial populations is understandable but mechanisms underlying development of these characteristics remain unknown. The answer may lie in another major function of both Hb and Mb, degradation of the ubiquitous bioactive compound, nitric oxide (NO). The research will test the hypothesis that loss of hemoprotein expression in icefishes has resulted in an increase in levels of NO that mediate modification of vascular systems and expansion of mitochondrial populations in oxidative tissues. The objectives of the proposal are to quantify the vascular density of retinas in +Hb and -Hb notothenioid species, to characterize NOS isoforms and catalytic activity in retina and cardiac muscle of Antarctic notothenioid fishes, to evaluate level of expression of downstream factors implicat ed in angiogenesis (in retinal tissue) and mitochondrial biogenesis (in cardiac muscle), and to determine whether inhibition of NOS in vivo results in regression of angiogenic and mitochondrial biogenic responses in icefishes. Broader impacts range from basic biology, through training of young scientists, to enhanced understanding of clinically relevant biomedical processes.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Biota; Oceans; Pot; Sample/collection Description; Sample/Collection Description; Southern Ocean; Trawl", "locations": "Southern Ocean", "north": -60.0, "nsf_funding_programs": null, "persons": "Sidell, Bruce", "project_titles": "Collaborative Research: Differential Expression of Oxygen-binding Proteins in Antarctic Fishes Affects Nitric Oxide-mediated Pathways of Angiogenesis and Mitochondrial Biogenesis.", "projects": [{"proj_uid": "p0000527", "repository": "USAP-DC", "title": "Collaborative Research: Differential Expression of Oxygen-binding Proteins in Antarctic Fishes Affects Nitric Oxide-mediated Pathways of Angiogenesis and Mitochondrial Biogenesis."}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Differential Expression of Oxygen-binding Proteins in Antarctic Fishes Affects Nitric Oxide-mediated Pathways of Angiogenesis and Mitochondrial Biogenesis", "uid": "600039", "west": -180.0}, {"awards": "0438777 Fritts, David", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "This proposal is to continue operation and scientific studies with the middle-frequency (MF, 1-30 MHz) mesospheric radar deployed at the British Antarctic station Rothera in 1996. This system is now a key site in the Antarctic MF radar chain near 68 deg. S, which includes also MF radars at Syowa (Japan) and Davis (Australia) stations. This radar comprises the winds component of a developing instrument suite for the mesosphere-thermosphere (MLT) studies at Rothera - a focus of the new BAS 5-year plan, which also includes the Fe temperature lidar (formerly at South Pole) and the mesopause airglow imager for gravity wave studies (formerly at Halley). The Rothera MF radar has just had its antennas and electronics upgraded to achieve better signal-to-noise ratio and more continuous measurements in height and time. The main focus of the proposed research is to extend the knowledge of the polar mesosphere dynamics. The instrument suite at Rothera is ideally positioned for correlative interhemispheric studies with northern hemisphere sites at Poker Flat, Alaska (65 deg. N) and ALOMAR, Norway (69 deg. N) having comparable instrumentation. Further research efforts performed with continued funding will focus on: (1) multi-instrument collaborative studies at Rothera to quantify as fully as possible the dynamics, structure, and variability of the MLT at that location, (2) multi-site (and multi-instrument) studies of large-scale dynamics and variability in the Antarctic (together with the radars and other instrumentation at Davis and Syowa), and (3) interhemispheric studies employing instruments (e.g., the Na resonance lidar and MF radar) at Poker Flat and ALOMAR. It is expected that these studies will lead to a more detailed understanding of (1) mean, tidal, and planetary wave structures at polar latitudes, (2) seasonal, inter-annual, and short-term variability of these structures, (3) hemispheric differences in the tidal and planetary wave structures arising from different source and wave interaction conditions, and (4) the relative influences of gravity waves in the two hemispheres. Such studies will also contribute more generally to an increased awareness of the role of high-latitude processes in global atmospheric dynamics and variability.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Atmosphere; Meteorology; Radar", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": null, "persons": "Fritts, David", "project_titles": "Correlative Antarctic and Inter-Hemispheric Dynamics Studies Using the MF Radar at Rothera", "projects": [{"proj_uid": "p0000021", "repository": "USAP-DC", "title": "Correlative Antarctic and Inter-Hemispheric Dynamics Studies Using the MF Radar at Rothera"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Correlative Antarctic and Inter-Hemispheric Dynamics Studies Using the MF Radar at Rothera", "uid": "600040", "west": -180.0}, {"awards": "0440414 Steig, Eric", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "This award supports a project to obtain stable isotope profiles from shallow (\u003c100 m) ice cores from East Antarctica, to add to the growing database of environmental proxy data collected under the auspices of the \"ITASE\" (International TransAntarctic Scientific Expedition) program. In Antarctica, the instrumental record of climate is particularly short (~40 years except in a few isolated locations on the coast), and ice core proxy data are the only means available for extending this record into the past. The use of stable isotopes of water (18-O/16-O and D/H ratios) from ice cores as proxies for temperature is well established for both very short (i.e. seasonal) and long timescales (centuries, millennia). Using multivariate regression methods and shallow ice cores from West Antarctica, a reconstruction of Antarctic climate over the last ~150 years has been developed which suggests the continent has been warming, on average, at a rate of ~0.2 K/century. Further improving these reconstructions is the chief motivation for further extending the US ITASE project. Ten to fifteen shallow (~100 m) from Victoria Land, East Antarctica will be obtained and analyzed. The core will be collected along a traverse route beginning at Taylor Dome and ending at the South Pole. Age-depth relationships for the cores will be determined through a combination of stable isotopes, visual stratigraphy and seasonal chemical signatures and marker horizons. Reconstructions of Antarctic climate obtained from these cores will be incorporated into the global network of paleoclimate information, which has been important in science, policy and educational contexts. The project will include graduate student and postdoctoral training and field experience.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Atmosphere; Climate; Cryosphere; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Isotope; ITASE; Meteorology; Paleoclimate; Satellite Remote Sensing; Weather Station Data", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": null, "persons": "Steig, Eric J.", "project_titles": "Stable Isotope Studies at East Antarctic US ITASE Sites", "projects": [{"proj_uid": "p0000202", "repository": "USAP-DC", "title": "Stable Isotope Studies at East Antarctic US ITASE Sites"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "ITASE", "south": -90.0, "title": "Stable Isotope Studies at East Antarctic US ITASE Sites", "uid": "600042", "west": -180.0}, {"awards": "0440478 Tang, Kam", "bounds_geometry": ["POINT(166.66267 -77.85067)"], "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "Phaeocystis Antarctica is a widely distributed phytoplankton that forms dense blooms and aggregates in the Southern Ocean. This phytoplankton and plays important roles in polar ecology and biogeochemistry, in part because it is a dominant primary producer, a main component of organic matter vertical fluxes, and the principal producer of volatile organic sulfur in the region. Yet P. Antarctica is also one of the lesser known species in terms of its physiology, life history and trophic relationships with other organisms; furthermore, information collected on other Phaeocystis species and from different locations may not be applicable to P. Antarctica in the Ross Sea. P. Antarctica occurs mainly as two morphotypes: solitary cells and mucilaginous colonies, which differ significantly in size, architecture and chemical composition. Relative dominance between solitary cells and colonies determines not only the size spectrum of the population, but also its carbon dynamics, nutrient uptake and utilization. Conventional thinking of the planktonic trophic processes is also challenged by the fact that colony formation could effectively alter the predator-prey interactions and interspecific competition. However, the factors that regulate the differences between solitary and colonial forms of P. Antarctica are not well-understood. \n\nThe research objective of this proposal is therefore to address these over-arching questions: \n1. Do P. Antarctica solitary cells and colonies differ in growth, composition and photosynthetic rates? 2. How do nutrients and grazers affect colony development and size distribution of P. Antarctica? \n3. How do nutrients and grazers act synergistically to affect the long-term population dynamics of P. Antarctica? \n\nExperiments will be conducted in the McMurdo station with natural P. Antarctica assemblages and co-occurring grazers. Laboratory experiments will be conducted to study size-specific growth and photosynthetic rates of P. Antarctica, size-specific grazing mortality due to microzooplankton and mesozooplankton, the effects of macronutrients on the (nitrogen compounds) relative dominance of solitary cells and colonies, and the effects of micronutrient (Fe) and grazing related chemical signals on P. Antarctica colony development. Because this species is of critical importance in the Southern Ocean, and because this research will provide critical information on factors that regulate the role of P.Antarctica in food webs and biogeochemical cycles, a major gap in knowledge will be addressed. This project will train two marine science Ph.D. students. The investigators will also collaborate with the School of Education and a marine science museum to communicate polar science to a broader audience.", "east": 166.66267, "geometry": ["POINT(166.66267 -77.85067)"], "keywords": "Biota; McMurdo Sound; Oceans; Phytoplankton; Ross Sea; Southern Ocean; Zooplankton", "locations": "Southern Ocean; McMurdo Sound; Ross Sea", "north": -77.85067, "nsf_funding_programs": null, "persons": "Smith, Walker; Tang, Kam", "project_titles": "Environmental and Ecological Regulation of Differences and Interactions between Solitary and Colonial forms of Phaeocystis antarctica", "projects": [{"proj_uid": "p0000214", "repository": "USAP-DC", "title": "Environmental and Ecological Regulation of Differences and Interactions between Solitary and Colonial forms of Phaeocystis antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.85067, "title": "Environmental and Ecological Regulation of Differences and Interactions between Solitary and Colonial Forms of Phaeocystis Antarctica", "uid": "600043", "west": 166.66267}, {"awards": "0230276 Ward, Bess", "bounds_geometry": ["POLYGON((162 -77.2,162.16 -77.2,162.32 -77.2,162.48 -77.2,162.64 -77.2,162.8 -77.2,162.96 -77.2,163.12 -77.2,163.28 -77.2,163.44 -77.2,163.6 -77.2,163.6 -77.26,163.6 -77.32,163.6 -77.38,163.6 -77.44,163.6 -77.5,163.6 -77.56,163.6 -77.62,163.6 -77.68,163.6 -77.74,163.6 -77.8,163.44 -77.8,163.28 -77.8,163.12 -77.8,162.96 -77.8,162.8 -77.8,162.64 -77.8,162.48 -77.8,162.32 -77.8,162.16 -77.8,162 -77.8,162 -77.74,162 -77.68,162 -77.62,162 -77.56,162 -77.5,162 -77.44,162 -77.38,162 -77.32,162 -77.26,162 -77.2))"], "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "Denitrification is the main process by which fixed nitrogen is lost from ecosystems and the regulation of this process may directly affect primary production and carbon cycling over short and long time scales. Previous investigations of the role of bioactive metals in regulating denitrification in bacteria from permanently ice-covered Lake Bonney in the Taylor Valley of East Antarctica indicated that denitrifying bacteria can be negatively affected by metals such as copper, iron, cadmium, lead, chromium, nickel, silver and zinc; and that there is a distinct difference in denitrifying activity between the east and west lobes of the lake. \n\nLow iron concentrations were found to exacerbate the potential toxicity of the other metals, while silver has the potential to specifically inhibit denitrification because of its ability to interfere with copper binding in redox proteins, such as nitrite reductase and nitrous oxide reductase. High silver concentrations might prevent the functioning of nitrous oxide reductase in the same way that simple copper limitation does, thereby causing the buildup of nitrous oxide and resulting in a nonfunctional nitrogen cycle. Other factors, such as oxygen concentration, are likely also to affect bacterial activity in Lake Bonney.\n\nThis project will investigate silver toxicity, general metal toxicity and oxygen concentration to determine their effect on denitrification in the lake by using a suite of \u0027sentinel\u0027 strains of denitrifying bacteria (isolated from the lake) incubated in Lake Bonney water and subjected to various treatments. The physiological responses of these strains to changes in metal and oxygen concentration will be quantified by flow cytometric detection of single cell molecular probes whose sensitivity and interpretation have been optimized for the sentinel strains. Understanding the relationships between metals and denitrification is expected to enhance our understanding of not only Lake Bonney\u0027s unusual nitrogen cycle, but more generally, of the potential role of metals in the regulation of microbial nitrogen transformations. The broader impacts of this work include not only a better understanding of regional biogeochemistry and global perspectives on these processes; but also the training of graduate students and a substantial outreach effort for school children.", "east": 163.6, "geometry": ["POINT(162.8 -77.5)"], "keywords": "Antarctica; Biota; CTD Data; Dry Valleys; Lake Bonney; Lake Vanda; Microbiology; Taylor Valley", "locations": "Taylor Valley; Lake Vanda; Lake Bonney; Dry Valleys; Antarctica", "north": -77.2, "nsf_funding_programs": null, "persons": "Ward, Bess", "project_titles": "Collaborative Research: What Limits Denitrification and Bacterial Growth in Lake Bonney, Taylor Valley, Antarctica?", "projects": [{"proj_uid": "p0000223", "repository": "USAP-DC", "title": "Collaborative Research: What Limits Denitrification and Bacterial Growth in Lake Bonney, Taylor Valley, Antarctica?"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.8, "title": "What Limits Denitrification and Bacterial Growth in Lake Bonney, Taylor Valley, Antarctica?", "uid": "600033", "west": 162.0}, {"awards": "0230069 Naveen, Ron", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "The Antarctic Site Inventory Project has collected biological data and site-descriptive information in the Antarctic Peninsula region since 1994. This research effort has provided data on those sites which are visited by tourists on shipboard expeditions in the region. The aim is to obtain data on the population status of several key species of Antarctic seabirds, which might be affected by the cumulative impact resulting from visits to the sites. This project will continue the effort by focusing on two heavily-visited Antarctic Peninsula sites: Paulet Island, in the northwestern Weddell Sea and Petermann Island, in the Lemaire Channel near Anvers Island. These sites were selected because both rank among the ten most visited sites in Antarctica each year in terms of numbers of visitors and zodiac landings; both are diverse in species composition, and both are sensitive to potential environmental disruptions from visitors. These data collected focus on two important biological parameters for penguins and blue-eyed shags: (1) breeding population size (number of occupied nests) and (2) breeding success (number of chicks per occupied nests). A long-term data program will be supported, with studies at the two sites over a five-year period. The main focus will be at Petermann Island, selected for intensive study due to its visitor status and location in the region near Palmer Station. This will allow for comparative data with the Palmer Long Term Ecological Research program. Demographic data will be collected in accordance with Standard Methods established by the Convention for the Conservation of Antarctic Marine Living Resources Ecosystem Monitoring Program and thus will be comparable with similar data sets being collected by other international Antarctic Treaty nation research programs. While separating human-induced change from change resulting from a combination of environmental factors will be difficult, this work will provide a first step to identify potential impacts. These long-term data sets will contribute to a better understanding of biological processes in the entire region and will contribute valuable information to be used by the Antarctic Treaty Parties as they address issues in environmental stewardship in Antarctica.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Biota; Penguin; Petermann Island", "locations": "Petermann Island; Antarctica", "north": -60.0, "nsf_funding_programs": null, "persons": "Naveen, Ronald", "project_titles": "Long-term Data Collection at Select Antarctic Peninsula Visitor Sites", "projects": [{"proj_uid": "p0000122", "repository": "USAP-DC", "title": "Long-term Data Collection at Select Antarctic Peninsula Visitor Sites"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Long-term Data Collection at Select Antarctic Peninsula Visitor Sites", "uid": "600032", "west": -180.0}, {"awards": "0228842 Grew, Edward", "bounds_geometry": ["POLYGON((76 -69.3,76.05 -69.3,76.1 -69.3,76.15 -69.3,76.2 -69.3,76.25 -69.3,76.3 -69.3,76.35 -69.3,76.4 -69.3,76.45 -69.3,76.5 -69.3,76.5 -69.32,76.5 -69.34,76.5 -69.36,76.5 -69.38,76.5 -69.4,76.5 -69.42,76.5 -69.44,76.5 -69.46,76.5 -69.48,76.5 -69.5,76.45 -69.5,76.4 -69.5,76.35 -69.5,76.3 -69.5,76.25 -69.5,76.2 -69.5,76.15 -69.5,76.1 -69.5,76.05 -69.5,76 -69.5,76 -69.48,76 -69.46,76 -69.44,76 -69.42,76 -69.4,76 -69.38,76 -69.36,76 -69.34,76 -69.32,76 -69.3))"], "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "This award, provided by the Antarctic Geology and Geophysics Program of the Office of Polar Programs, supports a project to investigate the role and fate of Boron in high-grade metamorphic rocks of the Larsemann Hills region of Antarctica. Trace elements provide valuable information on the changes sedimentary rocks undergo as temperature and pressure increase during burial. One such element, boron, is particularly sensitive to increasing temperature because of its affinity for aqueous fluids, which are lost as rocks are buried. Boron contents of unmetamorphosed pelitic sediments range from 20 to over 200 parts per million, but rarely exceed 5 parts per million in rocks subjected to conditions of the middle and lower crust, that is, temperatures of 700 degrees C or more in the granulite-facies, which is characterized by very low water activities at pressures of 5 to 10 kbar (18-35 km burial). Devolatization reactions with loss of aqueous fluid and partial melting with removal of melt have been cited as primary causes for boron depletion under granulite-facies conditions. Despite the pervasiveness of both these processes, rocks rich in boron are locally found in the granulite-facies, that is, there are mechanisms for retaining boron during the metamorphic process. The Larsemann Hills, Prydz Bay, Antarctica, are a prime example. More than 20 lenses and layered bodies containing four borosilicate mineral species crop out over a 50 square kilometer area, which thus would be well suited for research on boron-rich granulite-facies metamorphic rocks. While most investigators have focused on the causes for loss of boron, this work will investigate how boron is retained during high-grade metamorphism. Field observations and mapping in the Larsemann Hills, chemical analyses of minerals and their host rocks, and microprobe age dating will be used to identify possible precursors and deduce how the precursor materials recrystallized into borosilicate rocks under granulite-facies conditions. \n\nThe working hypothesis is that high initial boron content facilitates retention of boron during metamorphism because above a certain threshold boron content, a mechanism \u0027kicks in\u0027 that facilitates retention of boron in metamorphosed rocks. For example, in a rock with large amounts of the borosilicate tourmaline, such as stratabound tourmalinite, the breakdown of tourmaline to melt could result in the formation of prismatine and grandidierite, two borosilicates found in the Larsemann Hills. This situation is rarely observed in rocks with modest boron content, in which breakdown of tourmaline releases boron into partial melts, which in turn remove boron when they leave the system. Stratabound tourmalinite is associated with manganese-rich quartzite, phosphorus-rich rocks and sulfide concentrations that could be diagnostic for recognizing a tourmalinite protolith in a highly metamorphosed complex where sedimentary features have been destroyed by deformation. Because partial melting plays an important role in the fate of boron during metamorphism, our field and laboratory research will focus on the relationship between the borosilicate units, granite pegmatites and other granitic intrusives. The results of our study will provide information on cycling of boron at deeper levels in the Earth\u0027s crust and on possible sources of boron for granites originating from deep-seated rocks. An undergraduate student will participate in the electron microprobe age-dating of monazite and xenotime as part of a senior project, thereby integrating the proposed research into the educational mission of the University of Maine. In response to a proposal for fieldwork, the Australian Antarctic Division, which maintains Davis station near the Larsemann Hills, has indicated that they will support the Antarctic fieldwork.", "east": 76.5, "geometry": ["POINT(76.25 -69.4)"], "keywords": "Antarctica; Chemistry:rock; Chemistry:Rock; Geochemistry; Geochronology; Solid Earth", "locations": "Antarctica", "north": -69.3, "nsf_funding_programs": null, "persons": "Grew, Edward", "project_titles": "Boron in Antarctic granulite-facies rocks: under what conditions is boron retained in the middle crust?", "projects": [{"proj_uid": "p0000431", "repository": "USAP-DC", "title": "Boron in Antarctic granulite-facies rocks: under what conditions is boron retained in the middle crust?"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -69.5, "title": "Boron in Antarctic granulite-facies rocks: under what conditions is boron retained in the middle crust?", "uid": "600030", "west": 76.0}, {"awards": "0125098 Emslie, Steven", "bounds_geometry": ["POLYGON((-50 -60,-29 -60,-8 -60,13 -60,34 -60,55 -60,76 -60,97 -60,118 -60,139 -60,160 -60,160 -63,160 -66,160 -69,160 -72,160 -75,160 -78,160 -81,160 -84,160 -87,160 -90,139 -90,118 -90,97 -90,76 -90,55 -90,34 -90,13 -90,-8 -90,-29 -90,-50 -90,-50 -87,-50 -84,-50 -81,-50 -78,-50 -75,-50 -72,-50 -69,-50 -66,-50 -63,-50 -60))"], "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "This project will build on previous studies to investigate the occupation history and diet of Adelie penguins (Pygoscelis adeliae) in the Ross Sea region, Antarctica, with excavations of abandoned and active penguin colonies. Numerous active and abandoned colonies exist on the Victoria Land coast, from Cape Adare to Marble Point will be sampled. Some of these sites have been radiocarbon-dated and indicate a long occupation history for Adelie penguins extending to 13,000 years before present (B. P.). The material recovered from excavations, as demonstrated from previous investigations, will include penguin bones, tissue, and eggshell fragments as well as abundant remains of prey (fish bones, otoliths, squid beaks) preserved in ornithogenic (formed from bird guano) soils. These organic remains will be quantified and subjected to radiocarbon analyses to obtain a colonization history of penguins in this region. Identification of prey remains in the sediments will allow assessment of penguin diet. \n\nOther data (ancient DNA) from these sites will be analyzed through collaboration with New Zealand scientists. Past climatic conditions will be interpreted from published ice-core and marine-sediment records. These data will be used to test the hypothesis that Adelie penguins respond to climate change, past and present, in a predictable manner. In addition, the hypothesis that Adelie penguins alter their diet in accordance with climate, sea-ice conditions, and other marine environmental variables along a latitudinal gradient will be tested. Graduate and undergraduate students will be involved in this project and a project Web site will be developed to report results and maintain educational interaction between the PI and students at local middle and high schools in Wilmington, NC.", "east": 160.0, "geometry": ["POINT(55 -75)"], "keywords": "Antarctica; Biota; Geochronology; Oceans; Paleoclimate; Penguin; Radiocarbon; Ross Sea; Southern Ocean", "locations": "Southern Ocean; Antarctica; Ross Sea", "north": -60.0, "nsf_funding_programs": null, "persons": "Emslie, Steven D.", "project_titles": "Occupation History and Diet of Adelie Penguins in the Ross Sea Region", "projects": [{"proj_uid": "p0000220", "repository": "USAP-DC", "title": "Occupation History and Diet of Adelie Penguins in the Ross Sea Region"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Occupation History and Diet of Adelie Penguins in the Ross Sea Region", "uid": "600028", "west": -50.0}, {"awards": "0440954 Miller, Molly", "bounds_geometry": ["POLYGON((159 -76.61667,159.05 -76.61667,159.1 -76.61667,159.15 -76.61667,159.2 -76.61667,159.25 -76.61667,159.3 -76.61667,159.35 -76.61667,159.4 -76.61667,159.45 -76.61667,159.5 -76.61667,159.5 -76.630003,159.5 -76.643336,159.5 -76.656669,159.5 -76.670002,159.5 -76.683335,159.5 -76.696668,159.5 -76.710001,159.5 -76.723334,159.5 -76.736667,159.5 -76.75,159.45 -76.75,159.4 -76.75,159.35 -76.75,159.3 -76.75,159.25 -76.75,159.2 -76.75,159.15 -76.75,159.1 -76.75,159.05 -76.75,159 -76.75,159 -76.736667,159 -76.723334,159 -76.710001,159 -76.696668,159 -76.683335,159 -76.670002,159 -76.656669,159 -76.643336,159 -76.630003,159 -76.61667))"], "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "This project studies fossils from two to three hundred million year old rocks in the Allan Hills area of Antarctica. Similar deposits from lower latitudes have been used to develop a model of Permo-Triassic climate, wherein melting of continental glaciers in the early Permian leads to the establishment of forests in a cold, wet climate. Conditions became warmer and dryer by the early Triassic, inhibiting plant growth until a moistening climate in the late Triassic allowed plant to flourish once again. This project will test and refine this model and investigate the general effects of climate change on landscapes and ecosystems using the unique exposures and well-preserved fossil and sediment records in the Allan Hills area. The area will be searched for fossil forests, vertebrate tracks and burrows, arthropod trackways, and subaqueously produced biogenic structures, which have been found in other areas of Antarctica. Finds will be integrated with previous paleobiologic studies to reconstruct and interpret ecosystems and their changes. Structures and rock types documenting the end phases of continental glaciation and other major episodic sedimentations will also be described and interpreted. This project contributes to understanding the: (1) evolution of terrestrial and freshwater ecosystems and how they were affected by the end-Permian extinction, (2) abundance and diversity of terrestrial and aquatic arthropods at high latitudes, (3) paleogeographic distribution and evolution of vertebrates and invertebrates as recorded by trace and body fossils; and (3) response of landscapes to changes in climate. In terms of broader impacts, this project will provide an outstanding introduction to field research for graduate and undergraduate students, and generate related opportunities for several undergraduates. It will also stimulate exchange of ideas among research and primarily undergraduate institutions. Novel outreach activities are also planned to convey Earth history to the general public, including a short film on the research process and products, and paintings by a professional scientific illustrator of Permo-Traissic landscapes and ecosystems.", "east": 159.5, "geometry": ["POINT(159.25 -76.683335)"], "keywords": "Allan Hills; Antarctica; Paleontology; Sample/collection Description; Sample/Collection Description; Solid Earth", "locations": "Antarctica; Allan Hills", "north": -76.61667, "nsf_funding_programs": null, "persons": "Miller, Molly", "project_titles": "Collaborative Research: Reconstructing the High Latitude Permian-Triassic: Life, Landscapes, and Climate Recorded in the Allan Hills, South Victoria Land, Antarctica", "projects": [{"proj_uid": "p0000207", "repository": "USAP-DC", "title": "Collaborative Research: Reconstructing the High Latitude Permian-Triassic: Life, Landscapes, and Climate Recorded in the Allan Hills, South Victoria Land, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.75, "title": "Reconstructing the High Latitude Permian-Triassic: Life, Landscapes, and Climate Recorded in the Allan Hills, South Victoria Land, Antarctica", "uid": "600045", "west": 159.0}, {"awards": "0536526 Le Masurier, Wesley", "bounds_geometry": ["POLYGON((-136 -73,-133.4 -73,-130.8 -73,-128.2 -73,-125.6 -73,-123 -73,-120.4 -73,-117.8 -73,-115.2 -73,-112.6 -73,-110 -73,-110 -73.425,-110 -73.85,-110 -74.275,-110 -74.7,-110 -75.125,-110 -75.55,-110 -75.975,-110 -76.4,-110 -76.825,-110 -77.25,-112.6 -77.25,-115.2 -77.25,-117.8 -77.25,-120.4 -77.25,-123 -77.25,-125.6 -77.25,-128.2 -77.25,-130.8 -77.25,-133.4 -77.25,-136 -77.25,-136 -76.825,-136 -76.4,-136 -75.975,-136 -75.55,-136 -75.125,-136 -74.7,-136 -74.275,-136 -73.85,-136 -73.425,-136 -73))"], "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "This project uses geochemical studies to determine the origin of volcanic rocks from Marie Byrd Land (MBL), Antarctica. Surprisingly, adjacent volcanoes in the MBL have dramatically different compositions, ranging from phonolite to trachyte to rhyolite. This diversity offers an opportunity to constrain the processes responsible for generating silica oversaturated and undersaturated magmas in a single geologic setting. Previous work suggests that the most obvious and simplest explanation--crustal contamination--is not a significant factor, and that polybaric fractional crystallization is the major cause. This study evaluates these factors through analyses and interpretation of trace and rare earth element abundances, as well as Sr and Nd isotopic ratios. The broader impacts include outreach programs to the Girl Scouts of America, and dissemination of results through publications and meetings.", "east": -110.0, "geometry": ["POINT(-123 -75.125)"], "keywords": "Antarctica; Chemistry:rock; Chemistry:Rock; Geochemistry; Intracontinental Magmatism; IntraContinental Magmatism; Marie Byrd Land; Solid Earth", "locations": "Marie Byrd Land; Antarctica", "north": -73.0, "nsf_funding_programs": null, "persons": "Le Masurier, Wesley", "project_titles": "Geochemistry and Petrologic Evolution of Felsic Volcanoes in Western Marie Byrd Land, Antarctica", "projects": [{"proj_uid": "p0000534", "repository": "USAP-DC", "title": "Geochemistry and Petrologic Evolution of Felsic Volcanoes in Western Marie Byrd Land, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.25, "title": "Geochemistry and Petrologic Evolution of Felsic Volcanoes in Western Marie Byrd Land, Antarctica", "uid": "600051", "west": -136.0}, {"awards": "0538195 Marone, Chris", "bounds_geometry": null, "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "This award supports a project to conduct laboratory experiments and numerical modeling to determine the constitutive properties of subglacial till under dynamic stressing and to test the hypothesis that granular properties of till are sufficient, when coupled elastically to a large ice stream, to reproduce the field observations of triggered slip and subglacial seismicity. Testing will be carried out in a servo-controlled biaxial shear device under controlled temperature and stress conditions, which will allow both sliding and microstructural processes to be studied in detail. The main focus of the work will be on laboratory measurements. In addition, we will construct continuum models to evaluate whether our results can predict complex ice sheet motions and observed characteristics of subglacial seismicity. In terms of broader impacts, the proposed work will encourage interactions between the rock-mechanics and glaciology communities and will bring together members of different scientific backgrounds and vocabularies, but similar problems and data. The project will train undergraduate and graduate students at Penn State University and the scientists involved plan to give presentations to grade school classes, scout groups, and at community open houses. Results will be presented at professional meetings and will be published in a timely manner. The work will result in a better understanding of glacial motion and the physics of earthquake slip, which is essential for understanding ice sheet dynamics and earthquake hazard.", "east": null, "geometry": null, "keywords": "Antarctica; Glacial Till; Glaciers/ice Sheet; Glaciers/Ice Sheet; Lab Experiment; Marine Sediments; Physical Properties; Solid Earth", "locations": "Antarctica", "north": null, "nsf_funding_programs": null, "persons": "Marone, Chris; Anandakrishnan, Sridhar", "project_titles": "Laboratory Study of Stick-Slip Behavior and Deformation Mechanics of Subglacial Till", "projects": [{"proj_uid": "p0000554", "repository": "USAP-DC", "title": "Laboratory Study of Stick-Slip Behavior and Deformation Mechanics of Subglacial Till"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Laboratory Study of Stick-Slip Behavior and Deformation Mechanics of Subglacial Till", "uid": "600054", "west": null}, {"awards": "0538594 Ponganis, Paul", "bounds_geometry": ["POLYGON((165.983 -77.683,166.0164 -77.683,166.0498 -77.683,166.0832 -77.683,166.1166 -77.683,166.15 -77.683,166.1834 -77.683,166.2168 -77.683,166.2502 -77.683,166.2836 -77.683,166.317 -77.683,166.317 -77.6897,166.317 -77.6964,166.317 -77.7031,166.317 -77.7098,166.317 -77.7165,166.317 -77.7232,166.317 -77.7299,166.317 -77.7366,166.317 -77.7433,166.317 -77.75,166.2836 -77.75,166.2502 -77.75,166.2168 -77.75,166.1834 -77.75,166.15 -77.75,166.1166 -77.75,166.0832 -77.75,166.0498 -77.75,166.0164 -77.75,165.983 -77.75,165.983 -77.7433,165.983 -77.7366,165.983 -77.7299,165.983 -77.7232,165.983 -77.7165,165.983 -77.7098,165.983 -77.7031,165.983 -77.6964,165.983 -77.6897,165.983 -77.683))"], "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "The research will examine blood and muscle oxygen store depletion in relation to the documented aerobic dive limit (ADL, onset of post-dive blood lactate accumulation) in diving of emperor penguins. The intellectual merits of this proposal involve its evaluation of the physiological basis of the ADL concept. The ADL is probably the most commonly-used, but rarely measured, factor to interpret and model the behavior and foraging ecology of diving animals. Based on prior studies, and on recent investigations of respiratory and blood oxygen depletion during dives of emperor penguins, it is hypothesized that the ADL is a result of the depletion of myoglobin (Mb)-bound oxygen and increased glycolysis in the primary locomotory muscles. This project will accurately define the physiological mechanisms underlying the ADL through 1) evaluation of the rate and magnitude of muscle oxygen depletion during dives in relation to the previously measured ADL, 2) characterization of the hemoglobin-oxygen dissociation curve in blood of emperor penguins and comparison of that curve to those of other diving and non-diving species, 3) application of the emperor hemoglogin-oxygen dissociation curve to previously collected oxygen and hemoglobin data in order to estimate the rate and magnitude of blood oxygen depletion during dives, and 4) measurement of muscle phosphoocreatine and glycogen concentrations in order to estimate their potential contributions to muscle energy metabolism during diving. The project also continues the census and monitoring of the emperor colonies in the Ross Sea, which is especially important in light of both fisheries activity and the movement of iceberg B15-A. Broader impacts of the project include: 1) technological development of microprocessor-based, \u0027backpack\u0027 near-infrared spectrophotometer, which will be applicable not only to other species, but also to other fields (i.e., exercise physiology), 2) collaboration with the Department of Anesthesia at the U.S. Naval Hospital in San Diego in the training of anesthesia residents in research techniques, 3) the training and thesis research of two graduate students in these techniques and in Antarctic field research, and 4) a better understanding of the ADL concept and its use in the fields of diving behavior and physiology. In addition the annual census of emperor penguin colonies in the Ross Sea, in conjunction with the continued evaluation of previously developed remote cameras to monitor colony status, will form the basis of a new educational web site, and allow development of an educational outreach program to school children through SeaWorld of San Diego.", "east": 166.317, "geometry": ["POINT(166.15 -77.7165)"], "keywords": "Antarctica; Biota; Oceans; Penguin; Southern Ocean", "locations": "Antarctica; Southern Ocean", "north": -77.683, "nsf_funding_programs": null, "persons": "Ponganis, Paul", "project_titles": "The Aerobic Dive Limit: Oxygen Transport and Depletion in Emperor Penguins", "projects": [{"proj_uid": "p0000535", "repository": "USAP-DC", "title": "The Aerobic Dive Limit: Oxygen Transport and Depletion in Emperor Penguins"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.75, "title": "The Aerobic Dive Limit: Oxygen Transport and Depletion in Emperor Penguins", "uid": "600057", "west": 165.983}, {"awards": "0538683 Lal, Devendra", "bounds_geometry": ["POINT(-180 -90)"], "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "The principal aim of this research is to determine the precise manner in which solar activity has varied in the past 1000 years. During this period, four periods of very low solar activity have been identified: Wolf (1305-1345 AD), Spoerer (1418-1540 AD), Maunder (1645-1715), and one period of high solar activity (1100-1250 A.D.) have been deduced based on available historical records of sunspot numbers and aurora. Our proposal aims to study the solar activity during the past 1000 years in detail using a new method, based on studies of polar ice, as developed earlier (Earth and Planetary Science Letters, 234, 335-349, 2005). The method is based on the fact that greater solar activity leads to production of greater magnetic fields in the heliosphere, which reduces the primary cosmic ray flux in the near Earth environment, and vice-versa. Consequently if one can measure the primary cosmic ray flux in the near Earth space, it becomes a direct measure of the solar activity. Lal et al. (Earth and Planetary Science Letters, 234, 335-349, 2005) concluded that the best way of measuring the primary cosmic ray flux would be to measure the concentration of cosmogenic in-situ produced 14C in polar ice sheets, which was discovered by Lal et al. (Nature 346, 350-352, 1990). Following this idea Lal et al. (op. cit.) measured cosmogenic in-situ produced in 19 samples from the GISP 2 core covering time range of 375-31,250 yrs B.P. Their studies showed that there were two periods of very low solar activity in this time bracket (during 8500-9500 B.P and 27,000-32,000 B.P.), and one high solar activity period during 12,000-16,000 yrs B.P. In order to provide an independent check on the veracity of the new method, we decided to apply it to the historical period, \u003c 1000 yrs B.P. The inferred Solar activities based on the study of cosmogenic in-situ produced 14C in South Pole ice samples clearly establish that there was a period of high Solar activity during 1100-1250 A.D., and a period of very low solar activity during 1416-1534 A.D, designated as the Spoerer Minimum. These results however do not confirm the proposed dates for the Dalton and the Maunder Minimum periods, predicted to be 1795-1825 A.D. and 1654-1714 A.D. respectively. Instead, our studies show that there was a long duration period of low solar activity during 1750-1860 A.D. These results make it quite clear that we should carry out more studies to fully establish the temporal behavior of the Solar activity in the past 1000 yrs.", "east": -180.0, "geometry": ["POINT(-180 -90)"], "keywords": "Antarctica; Carbon-14; Cosmos; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Paleoclimate; Solar Activity; South Pole", "locations": "Antarctica; South Pole", "north": -90.0, "nsf_funding_programs": null, "persons": "Lal, Devendra", "project_titles": "Solar Activity during the Last Millennium, Estimated from Cosmogenic in-situ 14C in South Pole and GISP2 Ice Cores", "projects": [{"proj_uid": "p0000555", "repository": "USAP-DC", "title": "Solar Activity during the Last Millennium, Estimated from Cosmogenic in-situ 14C in South Pole and GISP2 Ice Cores"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Solar activity during the last millennium, estimated from cosmogenic in-situ C14 in South Pole and GISP2 ice cores", "uid": "600058", "west": -180.0}, {"awards": "0634682 Kanatous, Shane", "bounds_geometry": ["POLYGON((160 -77,160.7 -77,161.4 -77,162.1 -77,162.8 -77,163.5 -77,164.2 -77,164.9 -77,165.6 -77,166.3 -77,167 -77,167 -77.1,167 -77.2,167 -77.3,167 -77.4,167 -77.5,167 -77.6,167 -77.7,167 -77.8,167 -77.9,167 -78,166.3 -78,165.6 -78,164.9 -78,164.2 -78,163.5 -78,162.8 -78,162.1 -78,161.4 -78,160.7 -78,160 -78,160 -77.9,160 -77.8,160 -77.7,160 -77.6,160 -77.5,160 -77.4,160 -77.3,160 -77.2,160 -77.1,160 -77))"], "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "During the past three decades, intensive field studies have revealed much about the behavior, physiology, life history, and population dynamics of the Weddell seal (Leptonychotes weddelli) population of McMurdo Sound, Antarctica. These animals are marine predators that are highly adapted for an aquatic life in shore-fast and pack ice habitats. They must locate and capture sparsely distributed under the ice. Most of what is known about their diving behavior is based on studies of adult animals with little known about the development or the genetic controls of diving behavior of young animals. The goal of this project is to examine the temporal development of aerobic capacity, lipid metabolism and oxygen stores in the skeletal muscles of young Weddell seals and to determine which aspects of the cellular environment are important in the regulation of these adaptations during maturation. This project builds on past results to investigate the molecular controls that underlie the development of these adaptations. The first objective is to further characterize the ontogenetic changes in muscle aerobic capacity, lipid metabolism and myoglobin concentration and distribution using enzymatic, immuno-histochemical and myoglobin assays in newly weaned, subadult, and adult seals. The second objective is to determine the molecular controls that regulate these changes in aerobic capacity, fiber type distribution and myoglobin in skeletal muscles during maturation. Through subtractive hybridization and subsequent analysis, differences in mRNA populations in the swimming muscles of the different age classes of Weddell seals will be determined. These techniques will allow for the identification of the proteins and transcription factors that influence the ontogenetic changes in myoglobin concentration, fiber type distribution and aerobic capacity. These results will increase our understanding of both the ontogeny and molecular mechanisms by which young seals acquire the physiological capabilities to make deep (up to 700 m) and long aerobic dives (ca 20 min). This study will advance knowledge of the molecular regulation for the adaptations that enable active skeletal muscle to function under hypoxic conditions; this has a broader application for human medicine especially in regards to cardiac and pulmonary disease. Additional broader impacts include the participation of underrepresented scientists and a continuation of a website in collaboration with the Science Teachers Access to Resources at Southwestern University (STARS Program) which involves weekly updates about research efforts during the field season, weekly questions/answer session involving students and teachers, and updates on research results throughout the year.", "east": 167.0, "geometry": ["POINT(163.5 -77.5)"], "keywords": "Antarctica; Biota; Oceans; Seals; Sea Surface; Southern Ocean", "locations": "Sea Surface; Southern Ocean; Antarctica", "north": -77.0, "nsf_funding_programs": null, "persons": "Lyons, W. Berry; Kanatous, Shane", "project_titles": "The Molecular Signals that Regulate the Ontogeny of Aerobic Capacity, Lipid Metabolism and Elevated Myoglobin Concentrations in the Skeletal Muscles of Weddell Seals", "projects": [{"proj_uid": "p0000536", "repository": "USAP-DC", "title": "The Molecular Signals that Regulate the Ontogeny of Aerobic Capacity, Lipid Metabolism and Elevated Myoglobin Concentrations in the Skeletal Muscles of Weddell Seals"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "The Molecular Signals that Regulate the Ontogeny of Aerobic Capacity, Lipid Metabolism and Elevated Myoglobin Concentrations in the Skeletal Muscles of Weddell Seals", "uid": "600063", "west": 160.0}, {"awards": "0636629 Kurz, Mark", "bounds_geometry": ["POLYGON((160.7 -77.8,161.06 -77.8,161.42 -77.8,161.78 -77.8,162.14 -77.8,162.5 -77.8,162.86 -77.8,163.22 -77.8,163.58 -77.8,163.94 -77.8,164.3 -77.8,164.3 -77.86,164.3 -77.92,164.3 -77.98,164.3 -78.04,164.3 -78.1,164.3 -78.16,164.3 -78.22,164.3 -78.28,164.3 -78.34,164.3 -78.4,163.94 -78.4,163.58 -78.4,163.22 -78.4,162.86 -78.4,162.5 -78.4,162.14 -78.4,161.78 -78.4,161.42 -78.4,161.06 -78.4,160.7 -78.4,160.7 -78.34,160.7 -78.28,160.7 -78.22,160.7 -78.16,160.7 -78.1,160.7 -78.04,160.7 -77.98,160.7 -77.92,160.7 -77.86,160.7 -77.8))"], "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "This project uses cosmogenic nuclide dating and LIDAR studies of surface roughness to understand weathering and landscape evolution in the Dry Valleys of Antarctica. The work focuses on two processes: cryoturbation of frozen soils and the development of patterned, frozen ground on ancient lava flows. The approach includes innovative uses of He3 profiling. Results will also be applied to understanding the glacial history of the Dry Valleys. There are potential applications to understanding the history of the East Antarctic Ice Sheet and the formation of Martian landscapes. The broader impacts include graduate student education. As well, the work may contribute to our understanding of the history of the Antarctic ice sheets, which is important to modeling their behavior during global climate change.", "east": 164.3, "geometry": ["POINT(162.5 -78.1)"], "keywords": "Antarctica; Cosmogenic Radionuclides; Dry Valleys; Geology/Geophysics - Other; Glaciology; LIDAR; Navigation; Sample/collection Description; Sample/Collection Description", "locations": "Dry Valleys; Antarctica", "north": -77.8, "nsf_funding_programs": null, "persons": "Soule, S. Adam; Kurz, Mark D.", "project_titles": "Periglacial Landscape Evolution in Antarctic Lava Flows and Glacial Tills", "projects": [{"proj_uid": "p0000559", "repository": "USAP-DC", "title": "Periglacial Landscape Evolution in Antarctic Lava Flows and Glacial Tills"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.4, "title": "Periglacial Landscape Evolution in Antarctic Lava Flows and Glacial Tills", "uid": "600066", "west": 160.7}, {"awards": "0739452 Mukhopadhyay, Sujoy", "bounds_geometry": ["POLYGON((161 -76,161.2 -76,161.4 -76,161.6 -76,161.8 -76,162 -76,162.2 -76,162.4 -76,162.6 -76,162.8 -76,163 -76,163 -76.2,163 -76.4,163 -76.6,163 -76.8,163 -77,163 -77.2,163 -77.4,163 -77.6,163 -77.8,163 -78,162.8 -78,162.6 -78,162.4 -78,162.2 -78,162 -78,161.8 -78,161.6 -78,161.4 -78,161.2 -78,161 -78,161 -77.8,161 -77.6,161 -77.4,161 -77.2,161 -77,161 -76.8,161 -76.6,161 -76.4,161 -76.2,161 -76))"], "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "This project seeks to answer a simple question: how old are potholes and related geomorphic features found in the uplands of the McMurdo Dry Valleys, Antarctica? Some research suggests that they are over ten million years old and date the growth of the East Antarctic Ice Sheet, the world\u0027s largest. However, some evidence suggests that these are young, erosional features that continuing to evolve to this day. This project uses cosmogenic nuclide dating to determine the age of the pothole floors. The results are important for determining the ice sheet?s history and interpreting the O-isotope record from the marine sediment cores, key records of global climate. Broader impacts include K12 outreach and incorporation of outcomes into university courses.", "east": 163.0, "geometry": ["POINT(162 -77)"], "keywords": "Antarctica; Cosmogenic Dating; Dry Valleys; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Paleoclimate; Sample/collection Description; Sample/Collection Description; Solid Earth", "locations": "Dry Valleys; Antarctica", "north": -76.0, "nsf_funding_programs": null, "persons": "Mukhopadhyay, Sujoy", "project_titles": "Landform Evolution in the Dry Valleys and its implications for Miocene-Pliocene Climate Change in Antarctica", "projects": [{"proj_uid": "p0000461", "repository": "USAP-DC", "title": "Landform Evolution in the Dry Valleys and its implications for Miocene-Pliocene Climate Change in Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Landform Evolution in the Dry Valleys and its implications for Miocene-Pliocene Climate Change in Antarctica", "uid": "600074", "west": 161.0}, {"awards": "0739496 Miller, Molly", "bounds_geometry": ["POLYGON((163.41667 -77.33333,163.46667 -77.33333,163.51667 -77.33333,163.56667 -77.33333,163.61667 -77.33333,163.66667 -77.33333,163.71667 -77.33333,163.76667 -77.33333,163.81667 -77.33333,163.86667 -77.33333,163.91667 -77.33333,163.91667 -77.369997,163.91667 -77.406664,163.91667 -77.443331,163.91667 -77.479998,163.91667 -77.516665,163.91667 -77.553332,163.91667 -77.589999,163.91667 -77.626666,163.91667 -77.663333,163.91667 -77.7,163.86667 -77.7,163.81667 -77.7,163.76667 -77.7,163.71667 -77.7,163.66667 -77.7,163.61667 -77.7,163.56667 -77.7,163.51667 -77.7,163.46667 -77.7,163.41667 -77.7,163.41667 -77.663333,163.41667 -77.626666,163.41667 -77.589999,163.41667 -77.553332,163.41667 -77.516665,163.41667 -77.479998,163.41667 -77.443331,163.41667 -77.406664,163.41667 -77.369997,163.41667 -77.33333))"], "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "This project answers a simple question: why are there so few fossils in sediment cores from Antarctica\u0027s continental shelf? Antarctica\u0027s benthos are as biologically rich as those of the tropics. Shell-secreting organisms should have left a trail throughout geologic time, but have not. This trail is particularly important because these organisms record regional climate in ways that are critical to interpreting the global climate record. This study uses field experiments and targeted observations of modern benthic systems to examine the biases inflicted by fossil preservation. By examining a spectrum of ice-affected habitats, this project provides paleoenvironmental insights into carbonate preservation, sedimentation rates, and burial processes; and will provide new approaches to reconstructing the Cenozoic history of Antarctica. Broader impacts include graduate and undergraduate research and education, development of undergraduate curricula to link art and science, K12 outreach, public outreach via the web, and societal relevance through improved understanding of records of global climate change.", "east": 163.91667, "geometry": ["POINT(163.66667 -77.516665)"], "keywords": "Biota; Geochronology; Marine Sediments; Oceans; Southern Ocean", "locations": "Southern Ocean", "north": -77.33333, "nsf_funding_programs": null, "persons": "Furbish, David; Miller, Molly", "project_titles": "Collaborative Research: Linking Modern Benthic Communities and Taphonomic Processes to the Stratigraphic Record of Antarctic Cores", "projects": [{"proj_uid": "p0000203", "repository": "USAP-DC", "title": "Collaborative Research: Linking Modern Benthic Communities and Taphonomic Processes to the Stratigraphic Record of Antarctic Cores"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.7, "title": "Linking Modern Benthic Communities and Taphonomic Processes to the Stratigraphic Record of Antarctic Cores", "uid": "600076", "west": 163.41667}, {"awards": "0739512 Walker, Sally", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "This project answers a simple question: why are there so few fossils in sediment cores from Antarctica\u0027s continental shelf? Antarctica\u0027s benthos are as biologically rich as those of the tropics. Shell-secreting organisms should have left a trail throughout geologic time, but have not. This trail is particularly important because these organisms record regional climate in ways that are critical to interpreting the global climate record. This study uses field experiments and targeted observations of modern benthic systems to examine the biases inflicted by fossil preservation. By examining a spectrum of ice-affected habitats, this project provides paleoenvironmental insights into carbonate preservation, sedimentation rates, and burial processes; and will provide new approaches to reconstructing the Cenozoic history of Antarctica. Broader impacts include graduate and undergraduate research and education, development of undergraduate curricula to link art and science, K12 outreach, public outreach via the web, and societal relevance through improved understanding of records of global climate change.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Biota; Glaciers/ice Sheet; Glaciers/Ice Sheet; McMurdo Sound; Oceans; Sample/collection Description; Sample/Collection Description", "locations": "Antarctica; McMurdo Sound", "north": -60.0, "nsf_funding_programs": null, "persons": "Walker, Sally", "project_titles": "Collaborative Research: Linking Modern Benthic Communities and Taphonomic Processes to the Stratigraphic Record of Antarctic Cores; Collaborative research: The Antarctic Scallop as Key to Paleoenvironments and Sea Ice Conditions: Understanding the Modern to Predict the Past", "projects": [{"proj_uid": "p0010238", "repository": "USAP-DC", "title": "Collaborative research: The Antarctic Scallop as Key to Paleoenvironments and Sea Ice Conditions: Understanding the Modern to Predict the Past"}, {"proj_uid": "p0000203", "repository": "USAP-DC", "title": "Collaborative Research: Linking Modern Benthic Communities and Taphonomic Processes to the Stratigraphic Record of Antarctic Cores"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Linking Modern Benthic Communities and Taphonomic Processes to the Stratigraphic Record of Antarctic Cores", "uid": "600077", "west": -180.0}, {"awards": "0739620 Bieber, John", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "This proposal seeks funding to continue the neutron monitor observations at McMurdo for at least 4 years of operation - through the next solar activity maximum predicted in 2011-12. The neutron monitor in McMurdo is a crucial element of the \u0027Spaceship Earth\u0027 array - a 12-station multi-national network of neutron monitors optimized to measure the angular distribution of relativistic solar cosmic rays. McMurdo has the southernmost viewing direction of any neutron monitor station in the World, thereby providing a critical three-dimensional perspective on the cosmic ray distribution measured by the global array. Data returned from McMurdo and other \u0027Spaceship Earth\u0027 stations will enable the advanced understanding of the acceleration and transport of solar energetic particles, and of the transient and long-term modulation of galactic cosmic rays by the Sun. From the historical occurrence rates, continuing McMurdo observations through the solar activity maximum would allow to detect new relativistic solar particle events. Neutron monitors can play a direct role in forecasting and specifying solar wind disturbances, thus improving the capability to forecast major space weather events for the societal benefit. For example, providing the cosmic rays Ground-Level Enhancement (GLE) alerts is of direct relevance to aviation flights over high latitudes where these events can pose health hazards.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Atmosphere; Cosmic Ray; McMurdo; Neutron Monitor", "locations": "Antarctica; McMurdo", "north": -60.0, "nsf_funding_programs": null, "persons": "Evenson, Paul; Bieber, John", "project_titles": "Cosmic Ray Observations in McMurdo", "projects": [{"proj_uid": "p0000679", "repository": "USAP-DC", "title": "Cosmic Ray Observations in McMurdo"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Cosmic Ray Observations in McMurdo", "uid": "600078", "west": -180.0}, {"awards": "0739693 Ashworth, Allan", "bounds_geometry": ["POLYGON((160 -77,160.2 -77,160.4 -77,160.6 -77,160.8 -77,161 -77,161.2 -77,161.4 -77,161.6 -77,161.8 -77,162 -77,162 -77.1,162 -77.2,162 -77.3,162 -77.4,162 -77.5,162 -77.6,162 -77.7,162 -77.8,162 -77.9,162 -78,161.8 -78,161.6 -78,161.4 -78,161.2 -78,161 -78,160.8 -78,160.6 -78,160.4 -78,160.2 -78,160 -78,160 -77.9,160 -77.8,160 -77.7,160 -77.6,160 -77.5,160 -77.4,160 -77.3,160 -77.2,160 -77.1,160 -77))"], "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "This project studies the last vestiges of life in Antarctica from exceptionally well-preserved fossils of tundra life--mosses, diatoms, ostracods, Nothofagus leaves, wood, and insect remains recently discovered in ancient lake sediments from the McMurdo Dry Valleys. The area will be studied by an interdisciplinary team to elucidate information about climate and biogeography. These deposits offer unique and direct information about the characteristics of Antarctica during a key period in its history, the time when it was freezing. This information is critical for correlation with indirect proxies, such as though obtained from drill cores, for climate and state of the ice sheet. The results will also help understand the origin and migration of similar organisms found in South America, India and Australia. In terms of broader impacts, this project supports an early career researcher, undergraduate and graduate student research, various forms of outreach to K12 students, and extensive international collaboration. The work also has societal relevance in that the outcomes will offer direct constraints on Antarctica\u0027s ice sheet during a time with atmospheric CO2 contents similar to those of the earth in the coming centuries, and thus may help predictive models of sea level rise.", "east": 162.0, "geometry": ["POINT(161 -77.5)"], "keywords": "Antarctica; Geochronology; Geology/Geophysics - Other; GPS; Solid Earth", "locations": "Antarctica", "north": -77.0, "nsf_funding_programs": null, "persons": "Ashworth, Allan; Lewis, Adam", "project_titles": "Collaborative Research: Integrating Geomorphological and Paleoecological Studies to Reconstruct Neogene Environments of the Transantarctic Mountains", "projects": [{"proj_uid": "p0000188", "repository": "USAP-DC", "title": "Collaborative Research: Integrating Geomorphological and Paleoecological Studies to Reconstruct Neogene Environments of the Transantarctic Mountains"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Integrating Geomorphological and Paleoecological Studies to Reconstruct Neogene Environments of the Transantarctic Mountains", "uid": "600081", "west": 160.0}, {"awards": "0741380 Smith, Walker", "bounds_geometry": ["POLYGON((-160 -65,-154 -65,-148 -65,-142 -65,-136 -65,-130 -65,-124 -65,-118 -65,-112 -65,-106 -65,-100 -65,-100 -66.1,-100 -67.2,-100 -68.3,-100 -69.4,-100 -70.5,-100 -71.6,-100 -72.7,-100 -73.8,-100 -74.9,-100 -76,-106 -76,-112 -76,-118 -76,-124 -76,-130 -76,-136 -76,-142 -76,-148 -76,-154 -76,-160 -76,-160 -74.9,-160 -73.8,-160 -72.7,-160 -71.6,-160 -70.5,-160 -69.4,-160 -68.3,-160 -67.2,-160 -66.1,-160 -65))"], "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "The research will examine the relative importance of the physical and chemical controls on phytoplankton dynamics and carbon flux in continental margin regions of the Southern Ocean, and elucidate mechanisms by which plankton populations and carbon export might be altered by climate change. We specifically will address (1) how the phytoplankton on the continental margins of the southern Ocean respond to spatial and temporal changes in temperature, light, iron supply, and carbon dioxide levels, (2) how these factors initiate changes in phytoplankton assemblage structure, and (3) how carbon export and the efficiency of the biological pump are impacted by the biomass and composition of the phytoplankton. Two regions of study (the Amundsen and Ross Seas) will be investigated, one well studied (Ross Sea) and one poorly described (Amundsen Sea). It is hypothesized that each region will have markedly different physical forcing, giving rise to distinct chemical conditions and therefore biological responses. As such, the comparison of the two may give us insights into the mechanisms of how Antarctic continental margins will respond under changing environmental conditions. Broader impacts include participation by an international graduate student from Brazil, outreach via seminars to the general public, collaboration with the teachers-in-residence on the cruise, development of a cruise web site and interactive email exchanges with local middle school students while at sea.", "east": -100.0, "geometry": ["POINT(-130 -70.5)"], "keywords": "Amundsen Sea; Chemistry:fluid; Chemistry:Fluid; CTD Data; Geochemistry; Oceans; Oden; OSO2007; Sea Surface; Southern Ocean", "locations": "Southern Ocean; Sea Surface; Amundsen Sea", "north": -65.0, "nsf_funding_programs": null, "persons": "Smith, Walker", "project_titles": "Small Grants for Exploratory Research - Oceanographic Research in the Amundsen and Ross Seas:", "projects": [{"proj_uid": "p0000217", "repository": "USAP-DC", "title": "Small Grants for Exploratory Research - Oceanographic Research in the Amundsen and Ross Seas:"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -76.0, "title": "Small Grants for Exploratory Research - Oceanographic Research in the Amundsen and Ross Seas", "uid": "600085", "west": -160.0}, {"awards": "0742057 Gallager, Scott", "bounds_geometry": ["POLYGON((-168.291 -64.846,-165.018 -64.846,-161.745 -64.846,-158.472 -64.846,-155.199 -64.846,-151.926 -64.846,-148.653 -64.846,-145.38 -64.846,-142.107 -64.846,-138.834 -64.846,-135.561 -64.846,-135.561 -66.0269,-135.561 -67.2078,-135.561 -68.3887,-135.561 -69.5696,-135.561 -70.7505,-135.561 -71.9314,-135.561 -73.1123,-135.561 -74.2932,-135.561 -75.4741,-135.561 -76.655,-138.834 -76.655,-142.107 -76.655,-145.38 -76.655,-148.653 -76.655,-151.926 -76.655,-155.199 -76.655,-158.472 -76.655,-161.745 -76.655,-165.018 -76.655,-168.291 -76.655,-168.291 -75.4741,-168.291 -74.2932,-168.291 -73.1123,-168.291 -71.9314,-168.291 -70.7505,-168.291 -69.5696,-168.291 -68.3887,-168.291 -67.2078,-168.291 -66.0269,-168.291 -64.846))"], "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "The research will continue and extend the study in the Southern Ocean that was initiated during the Oden Southern Ocean 2006 expedition in collaboration with Swedish scientist Mellissa Chierici. We will quantify carbon flux through the food web in the marginal ice zone (MIZ) by measuring size fractionated primary and secondary production, grazing and carbon flux through nanoplankton (2-20 um), microplankton (20-200um), and mesoplankton (200-2000 um). Community structure, species abundance and size specific grazing rates will be quantified using a variety of techniques both underway and at ice stations along the MIZ. The proposed cruise track extends across the Drake Passage to the Western Antarctic Peninsula (WAP) with three station transects along a gradient from the open ocean through the marginal ice zone (MIZ) in the Bellinghausen and Amundsen Seas and into the Ross Sea Polynya. Ice stations along each transect will provide material to characterize production associated with annual ice. Underway measurements of primary and secondary production (chlorophyll, CDOM, microplankton, and mesoplankton) and hydrography (temperature, salinity, pH, DO, turbidity) will establish a baseline for future cruises and as support for other projects such as biogeochemical studies on carbon dioxide drawdown and trace metal work on primary production. The outcome of these measurements will be a description of nano to mesoplankton standing stocks, community structure, and carbon flux along the MIZ in the Bellinghausen and Amundsen Seas and the Ross Sea Polynya.", "east": -135.561, "geometry": ["POINT(-151.926 -70.7505)"], "keywords": "Amundsen Sea; Biota; Microbiology; Navigation; Oceans; Oden; OSO2007; Sample/collection Description; Sample/Collection Description; Southern Ocean", "locations": "Amundsen Sea; Southern Ocean", "north": -64.846, "nsf_funding_programs": null, "persons": "Dennett, Mark; Gallager, Scott", "project_titles": "SGER: Primary and Secondary Production and Carbon Flux Through the Microbial Community Along the Western Antarctic Marginal Ice Zone on the Oden Southern Ocean 2007 Expeditions", "projects": [{"proj_uid": "p0000563", "repository": "USAP-DC", "title": "SGER: Primary and Secondary Production and Carbon Flux Through the Microbial Community Along the Western Antarctic Marginal Ice Zone on the Oden Southern Ocean 2007 Expeditions"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -76.655, "title": "SGER: Primary and Secondary Production and Carbon Flux Through the Microbial Community Along the Western Antarctic Marginal Ice Zone on the Oden Southern Ocean 2007 Expeditions", "uid": "600086", "west": -168.291}, {"awards": "0817163 Reiners, Peter", "bounds_geometry": ["POLYGON((72 -66,72.3 -66,72.6 -66,72.9 -66,73.2 -66,73.5 -66,73.8 -66,74.1 -66,74.4 -66,74.7 -66,75 -66,75 -66.3,75 -66.6,75 -66.9,75 -67.2,75 -67.5,75 -67.8,75 -68.1,75 -68.4,75 -68.7,75 -69,74.7 -69,74.4 -69,74.1 -69,73.8 -69,73.5 -69,73.2 -69,72.9 -69,72.6 -69,72.3 -69,72 -69,72 -68.7,72 -68.4,72 -68.1,72 -67.8,72 -67.5,72 -67.2,72 -66.9,72 -66.6,72 -66.3,72 -66))"], "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "This Small Grant for Exploratory Research investigates the origin and evolution of the Gamburtsev subglacial mountains (GSM). These mountains are considered the nucleation point for Antarctica\u0027s largest ice sheets; however, being of indeterminate age, they may postdate ice sheet formation. As well, their formation could reflect tectonic events during the breakup of Gondwana. The project studies GSM-derived detrital zircon and apatite crystals from Prydz Bay obtained by the Ocean Drilling Program. Analytical work includes triple-dating thermochronometry by U/Pb, fission track, and (U/Th)/He methods. The combined technique offers insight into both high and low temperature processes, and is potentially sensitive to both the orogenic events and the subsequent cooling and exhumation due to erosion. In terms of broader impacts, this project supports research for a postdoctoral fellow.", "east": 75.0, "geometry": ["POINT(73.5 -67.5)"], "keywords": "Antarctica; Gamburtsev Mountains; Geochronology; Marine Sediments; NBP0101; ODP1166; Prydz Bay; Solid Earth; Southern Ocean", "locations": "Antarctica; Prydz Bay; Southern Ocean; Gamburtsev Mountains", "north": -66.0, "nsf_funding_programs": null, "persons": "Gehrels, George; Reiners, Peter", "project_titles": "Collaborative Research: SGER: Triple-dating (Pb-FT-He) of Antarctic Detritus and the Origin of the Gamburtsev Mountains", "projects": [{"proj_uid": "p0000210", "repository": "USAP-DC", "title": "Collaborative Research: SGER: Triple-dating (Pb-FT-He) of Antarctic Detritus and the Origin of the Gamburtsev Mountains"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -69.0, "title": "Triple-dating (Pb-FT-He) of Antarctic Detritus and the Origin of the Gamburtsev Mountains", "uid": "600090", "west": 72.0}, {"awards": "0126057 Brook, Edward J.", "bounds_geometry": ["POINT(-38.466667 72.5833333)"], "date_created": "Tue, 16 Dec 2008 00:00:00 GMT", "description": "Ice Core Interplanetary Dust Helium Isotope Data Helium isotope data from Ice Cores at GISP2 (Greenland) and Vostok (Antarctica) as a proxy for extraterrestrial dust flux.\n", "east": -38.466667, "geometry": ["POINT(-38.466667 72.5833333)"], "keywords": "Antarctica; Arctic; Atmosphere; Chemistry:fluid; Chemistry:Fluid; Geochemistry; GISP2; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Isotope; Lake Vostok; Paleoclimate; Vostok Ice Core", "locations": "Antarctica; Lake Vostok; Arctic", "north": 72.5833333, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Brook, Edward J.; Kurz, Mark D.", "project_titles": "High Resolution Records of Atmospheric Methane in Ice Cores and Implications for Late Quaternary Climate Change", "projects": [{"proj_uid": "p0000034", "repository": "USAP-DC", "title": "High Resolution Records of Atmospheric Methane in Ice Cores and Implications for Late Quaternary Climate Change"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": 72.5833333, "title": "GISP2 (D Core) Helium Isotopes from Interplanetary Dust", "uid": "609361", "west": -38.466667}, {"awards": "0126057 Brook, Edward J.", "bounds_geometry": ["POINT(-38.466667 72.5833333)"], "date_created": "Tue, 16 Dec 2008 00:00:00 GMT", "description": "This ice core data is archived at the World Data Center for Paleoclimatology and is available through the Ice Core Data Gateway. The data includes methane data from the Greenland Ice Sheet Project 2 (GISP2). GISP2 is an ice core project that drilled through the Greenland ice sheet and 1.55 meters into bedrock. The ice core is 3053.44 meters in depth, the deepest ice core recovered in the world at the time. The ice core was completed in 1993 after five years of drilling.\n\nMethane concentrations were determined by GC-FID using standards calibrated by NOAA CMDL. \t\t\t\t\t\nThe gas age time scales and analytical techniques are described in further detail in the publication.", "east": -38.466667, "geometry": ["POINT(-38.466667 72.5833333)"], "keywords": "Antarctica; Arctic; Atmosphere; Chemistry:fluid; Chemistry:Fluid; Geochemistry; GISP2; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Methane; Paleoclimate; Taylor Dome", "locations": "Antarctica; Taylor Dome; Arctic", "north": 72.5833333, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Brook, Edward J.", "project_titles": "High Resolution Records of Atmospheric Methane in Ice Cores and Implications for Late Quaternary Climate Change", "projects": [{"proj_uid": "p0000034", "repository": "USAP-DC", "title": "High Resolution Records of Atmospheric Methane in Ice Cores and Implications for Late Quaternary Climate Change"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": 72.5833333, "title": "GISP2 (D Core) Methane Concentration Data", "uid": "609360", "west": -38.466667}, {"awards": "0229546 MacAyeal, Douglas", "bounds_geometry": ["POINT(-178 -78)"], "date_created": "Mon, 15 Dec 2008 00:00:00 GMT", "description": "Since November of 2006, 12 thermistors were planted in the upper 16 meters of the firn on the Ross Ice Shelf near its calving front. Temperature data are collected every 20 minutes and are transmitted via ARGOS satellite relay. Data are intended to provide a view of how firn temperatures change as the ice shelf evolves. Data are available in comma-delimited ASCII format. Data are available via FTP.", "east": -178.0, "geometry": ["POINT(-178 -78)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ross Ice Shelf; Snow/ice; Snow/Ice; Temperature", "locations": "Antarctica; Ross Ice Shelf", "north": -78.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Scambos, Ted; Muto, Atsu; Sergienko, Olga; MacAyeal, Douglas", "project_titles": "Collaborative Research of Earth\u0027s Largest Icebergs", "projects": [{"proj_uid": "p0000117", "repository": "USAP-DC", "title": "Collaborative Research of Earth\u0027s Largest Icebergs"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Ross Ice Shelf Firn Temperature, Antarctica", "uid": "609354", "west": -178.0}, {"awards": "0229546 MacAyeal, Douglas", "bounds_geometry": ["POINT(168 -78)"], "date_created": "Fri, 28 Nov 2008 00:00:00 GMT", "description": "Since November of 2005, 12 thermistors were planted in the upper 2.5 meters of the firn on iceberg C16, Antarctica. Temperature data are collected every 20 minutes and are transmitted via ARGOS satellite relay. Data are intended to provide a view of how firn temperatures change as an iceberg moves north into warmer climate.", "east": 168.0, "geometry": ["POINT(168 -78)"], "keywords": "Glaciology; Iceberg; Oceans; Ross Ice Shelf; Sea Ice; Snow/ice; Snow/Ice; Southern Ocean; Temperature", "locations": "Ross Ice Shelf; Southern Ocean", "north": -78.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Thom, Jonathan; Sergienko, Olga; MacAyeal, Douglas", "project_titles": "Collaborative Research of Earth\u0027s Largest Icebergs", "projects": [{"proj_uid": "p0000117", "repository": "USAP-DC", "title": "Collaborative Research of Earth\u0027s Largest Icebergs"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Iceberg Firn Temperatures, Antarctica", "uid": "609352", "west": 168.0}, {"awards": "0229546 MacAyeal, Douglas", "bounds_geometry": ["POINT(168 -77)"], "date_created": "Tue, 25 Nov 2008 00:00:00 GMT", "description": "Time series of tiltmeter observations (tilt about two horizontal axes in microradians) for a 34 day period on iceberg C16 while it was aground near Ross Island in late 2001 to early 2002. Data shows tilts associated with differential basal melting of the iceberg, tidal motion and short-term tilts induced by iceberg tremor phenomena triggered by collisions between B15A and C16. The sample rate was 5 seconds. Data are available in comma-delimited ASCII format. Data are available via FTP.", "east": 168.0, "geometry": ["POINT(168 -77)"], "keywords": "Glaciology; Iceberg; Oceans; Ross Ice Shelf; Sea Ice; Southern Ocean; Tiltmeter", "locations": "Southern Ocean; Ross Ice Shelf", "north": -77.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Kim, Young-Jin; Bliss, Andrew; MacAyeal, Douglas", "project_titles": "Collaborative Research of Earth\u0027s Largest Icebergs", "projects": [{"proj_uid": "p0000117", "repository": "USAP-DC", "title": "Collaborative Research of Earth\u0027s Largest Icebergs"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.0, "title": "Iceberg Tiltmeter Measurements, Antarctica", "uid": "609353", "west": 168.0}, {"awards": "0229546 MacAyeal, Douglas", "bounds_geometry": ["POINT(-178 -78)"], "date_created": "Tue, 11 Nov 2008 00:00:00 GMT", "description": "From November 2004 to March 2005, on the Ross Ice Shelf, Antarctica, an automated \"web cam\" was operated on the southward facing lip of a large ice-shelf rift to produce a photographic record of processes active in ice-shelf rift systems. Four times each day, the camera took a photograph in four repeating directions.", "east": -178.0, "geometry": ["POINT(-178 -78)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Photo/video; Photo/Video; Ross Ice Shelf", "locations": "Ross Ice Shelf; Antarctica", "north": -78.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Brunt, Kelly; MacAyeal, Douglas", "project_titles": "Collaborative Research of Earth\u0027s Largest Icebergs", "projects": [{"proj_uid": "p0000117", "repository": "USAP-DC", "title": "Collaborative Research of Earth\u0027s Largest Icebergs"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Ice Shelf Rift Time-Lapse Photography, Antarctica", "uid": "609351", "west": -178.0}, {"awards": "0636953 Saltzman, Eric", "bounds_geometry": ["POINT(-148.82 -81.66)"], "date_created": "Wed, 22 Oct 2008 00:00:00 GMT", "description": "This data set is an analysis of methyl chloride concentration measured in air extracted from ice core samples from the Siple Dome A deep core in West Antarctica. In total, forty six (46) ice samples, approximately 10-15 cm in length, were analyzed in this study. Data are available in Microsoft Excel format and are available via FTP.", "east": -148.82, "geometry": ["POINT(-148.82 -81.66)"], "keywords": "Antarctica; Atmosphere; Chemistry:fluid; Chemistry:Fluid; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Paleoclimate; Siple Dome; Siple Dome Ice Core", "locations": "Antarctica; Siple Dome", "north": -81.66, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Saltzman, Eric; Aydin, Murat; Williams, Margaret", "project_titles": "Methyl Chloride, Methyl Bromide, and Carbonyl Sulfide in Deep Antarctic Ice Cores", "projects": [{"proj_uid": "p0000042", "repository": "USAP-DC", "title": "Methyl Chloride, Methyl Bromide, and Carbonyl Sulfide in Deep Antarctic Ice Cores"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core", "south": -81.66, "title": "Methyl Chloride Measurements from the Siple Dome A Deep Core, Antarctica", "uid": "609356", "west": -148.82}, {"awards": "0229546 MacAyeal, Douglas", "bounds_geometry": ["POLYGON((-178 -60,-149.2 -60,-120.4 -60,-91.6 -60,-62.8 -60,-34 -60,-5.2 -60,23.6 -60,52.4 -60,81.2 -60,110 -60,110 -61.8,110 -63.6,110 -65.4,110 -67.2,110 -69,110 -70.8,110 -72.6,110 -74.4,110 -76.2,110 -78,81.2 -78,52.4 -78,23.6 -78,-5.2 -78,-34 -78,-62.8 -78,-91.6 -78,-120.4 -78,-149.2 -78,-178 -78,-178 -76.2,-178 -74.4,-178 -72.6,-178 -70.8,-178 -69,-178 -67.2,-178 -65.4,-178 -63.6,-178 -61.8,-178 -60))"], "date_created": "Mon, 20 Oct 2008 00:00:00 GMT", "description": "During 2001-2006, 6 giant icebergs (B15A, B15J, B15K, C16 and C25) adrift in the southwestern Ross Sea, Antarctica, were instrumented with global positioning system (GPS) receivers, magnetic compasses and automatic weather stations (AWS), to monitor their behavior in the near-coastal environment and to record their exit into the Southern Ocean. The GPS and AWS data were collected on a 20-minute interval, Many of the station data timeseries are continuous for periods of up to 7 years, with icebergs C16 and B15J having the longest records.\n\nThe data is considered useful for examining the processes of iceberg drift (and other behaviors) on time scales that are shorter than what is possible through satellite image iceberg tracking. Data are available in comma-delimited ASCII format and Matlab native mat files.", "east": 110.0, "geometry": ["POINT(-34 -69)"], "keywords": "AWS; Glaciology; GPS; Iceberg; Meteorology; Oceans; Ross Sea; Sea Ice; Southern Ocean; Weatherstation", "locations": "Southern Ocean; Ross Sea", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Okal, Emile; Aster, Richard; Bassis, Jeremy; MacAyeal, Douglas", "project_titles": "Collaborative Research of Earth\u0027s Largest Icebergs", "projects": [{"proj_uid": "p0000117", "repository": "USAP-DC", "title": "Collaborative Research of Earth\u0027s Largest Icebergs"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Giant Icebergs of the Ross Sea, in situ Drift and Weather Measurements, Antarctica", "uid": "609350", "west": -178.0}, {"awards": "0229546 MacAyeal, Douglas", "bounds_geometry": ["POINT(168 -77)"], "date_created": "Wed, 01 Oct 2008 00:00:00 GMT", "description": "Seismometers were placed on a 25 km by 50 km iceberg called C16 in the Ross Sea, Antarctica, to identify the Iceberg harmonic Tremor (IHT) source mechanism and to understand the relevance of IHT to iceberg calving, drift and break-up. The seismic observations reveal that the IHT signal consists of extended episodes of stick-slip icequakes (typically thousands per hour) generated when the ice-cliff edges of two tabular icebergs rub together during glancing, strike/slip type iceberg collisions (e.g., between C16 and B15A). With the source mechanism revealed, IHT may provide a promising signal useful for the study of iceberg behavior and iceberg-related processes such as climate-induced ice-shelf disintegration.\n\nHere, a single day of seismometer data for a single station on iceberg C16 is provided as an example of \"a day in the life of an iceberg\" for use by scientists and students wishing to know more about IHT. The station data is from C16 \"B\" site on C16\u0027s northeast corner, and the day is 27 December, 2003, a day when B15A struck C16 and caused an episode of tremor that was particularly easy to identify and understand. \n\nThis represents only a small fraction of the total data that exist for the seismic program on iceberg C16. The full data are archived at the IRIS data center (where seismic data is commonly archived). This one-day data set is to provide glaciologists with ready access to a good example of IHT that they can use for teaching and for demonstration purposes. Data are available in comma-delimited ASCII format and Matlab native mat files. Data are available via FTP.", "east": 168.0, "geometry": ["POINT(168 -77)"], "keywords": "Geology/Geophysics - Other; Glaciology; Iceberg; Oceans; Ross Sea; Sea Ice; Seismometer; Southern Ocean", "locations": "Ross Sea; Southern Ocean", "north": -77.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Okal, Emile; Aster, Richard; Bassis, Jeremy; MacAyeal, Douglas", "project_titles": "Collaborative Research of Earth\u0027s Largest Icebergs", "projects": [{"proj_uid": "p0000117", "repository": "USAP-DC", "title": "Collaborative Research of Earth\u0027s Largest Icebergs"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.0, "title": "Iceberg Harmonic Tremor, Seismometer Data, Antarctica", "uid": "609349", "west": 168.0}, {"awards": "0229546 MacAyeal, Douglas", "bounds_geometry": ["POINT(-178 -78)"], "date_created": "Wed, 01 Oct 2008 00:00:00 GMT", "description": "In October 2005, three geodetic GPS receivers were deployed on the Ross Ice Shelf near the ice front to observe short-term fluctuations in ice-shelf velocity associated with tidal forcing and other phenomena. Two stations were placed on either side of a large rift that is expected to eventually create the next iceberg to calve from the Ross Ice Shelf (called \"Nascent Iceberg\"). One station was established at a location near station R13, occupied in 1979 during the RIGGS project (Thomas et al., 1984), to determine if the near-ice-front part of the Ross Ice Shelf has significantly changed its long-term flow since the late 1970s.", "east": -178.0, "geometry": ["POINT(-178 -78)"], "keywords": "Antarctica; Geodesy; Geology/Geophysics - Other; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPS; Ross Ice Shelf; Southern Ocean", "locations": "Antarctica; Southern Ocean; Ross Ice Shelf", "north": -78.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Brunt, Kelly; King, Matthew; MacAyeal, Douglas", "project_titles": "Collaborative Research of Earth\u0027s Largest Icebergs", "projects": [{"proj_uid": "p0000117", "repository": "USAP-DC", "title": "Collaborative Research of Earth\u0027s Largest Icebergs"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Continuous GPS (static) Data from the Ross Ice Shelf, Antarctica", "uid": "609347", "west": -178.0}, {"awards": "0440636 Fahnestock, Mark", "bounds_geometry": null, "date_created": "Thu, 25 Sep 2008 00:00:00 GMT", "description": null, "east": null, "geometry": null, "keywords": null, "locations": null, "north": null, "nsf_funding_programs": null, "persons": "Fahnestock, Mark", "project_titles": "Collaborative Research: Using Fracture Patterns and Ice Thickness to Study the History and Dynamics of Grounding Line Migration and Shutdown of Kamb and Whillans Ice Streams", "projects": [{"proj_uid": "p0000096", "repository": "USAP-DC", "title": "Collaborative Research: Using Fracture Patterns and Ice Thickness to Study the History and Dynamics of Grounding Line Migration and Shutdown of Kamb and Whillans Ice Streams"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Using Fracture Patterns and Ice Thickness to Study the History and Dynamics of Grounding Line Migration and Shutdown of Kamb and Whillans Ice Streams", "uid": "600024", "west": null}, {"awards": "0338267 Gooseff, Michael", "bounds_geometry": null, "date_created": "Thu, 11 Sep 2008 00:00:00 GMT", "description": null, "east": null, "geometry": null, "keywords": null, "locations": null, "north": null, "nsf_funding_programs": null, "persons": "Gooseff, Michael N.", "project_titles": "Collaborative Research: Hydrologic Controls over Biogeochemistry and Microbial Community Structure and Function across Terrestrial/Aquatic Interfaces in a Polar Desert", "projects": [{"proj_uid": "p0000340", "repository": "USAP-DC", "title": "Collaborative Research: Hydrologic Controls over Biogeochemistry and Microbial Community Structure and Function across Terrestrial/Aquatic Interfaces in a Polar Desert"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Hydrologic Margins Research Project, 2004-2008, McMurdo Dry Valleys", "uid": "600016", "west": null}, {"awards": "0636899 Mende, Stephen", "bounds_geometry": null, "date_created": "Tue, 01 Jan 2008 00:00:00 GMT", "description": "Auroral protons are not energized by electric fields directly above the auroral atmosphere and therefore they are a much better diagnostic of processes deep in the magnetosphere. It has been shown from measurements from space by the IMAGE spacecraft that the dayside hydrogen emission is directly related to dayside reconnection processes. A four channel all-sky images had been operating at South Pole during 2004-2007 to observe auroral features in specific wavelengths channels that allowed a quantitative investigation of proton aurora. This was accomplished by measuring the Hydrogen Balmer beta line at 486.1 nm and by monitoring another wavelength band for subtracting non proton produced background emissions. South Pole allows these measurements because of the 24 hour darkness and favorable conditions even on the dayside. To increase the scientific return it was also attempted to measure the Doppler shift of the hydrogen emissions because that provides diagnostics regarding the energy of the protons. Thus the proton camera measured 3 wavelength bands simultaneously in the vicinity of the Balmer beta line to provide the line intensity near zero Doppler shift, at a substantial Doppler shift and a third channel for background. \n\nThe 4-channel all-sky camera at South Pole was modified in 2008 in order to observe several types of auroras, and to distinguish the cusp reconnection aurora from the normal plasma sheet precipitation. The camera simultaneously operates in four wavelength regions that allow a distinction between auroras that are created by higher energy electrons (greater than 1 keV) and those created by low energy (less than 500 eV) precipitation. The cusp is the location where plasma enters the magnetosphere through the process of magnetic reconnection. This reconnection occurs where the Interplanetary Magnetic Field (IMF) and the terrestrial magnetic field are oriented in opposite directions. \n\nThe data are represented as keograms (geomagnetic north-south slices through the time series of images) for the four different wavelengths. The top of the keogram points to the magnetic south pole. The time series allows a very quick assessment about the presence of aurora, motion, intensity, and brightness differences in the four simultaneously registered channels.", "east": null, "geometry": null, "keywords": "Antarctica; Atmosphere; Aurora; Cosmos; Photo/video; Photo/Video", "locations": "Antarctica", "north": null, "nsf_funding_programs": null, "persons": "Frey, Harald; Mende, Stephen", "project_titles": "Antarctic Auroral Imaging", "projects": [{"proj_uid": "p0000361", "repository": "USAP-DC", "title": "Antarctic Auroral Imaging"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Antarctic Auroral Imaging", "uid": "600070", "west": null}, {"awards": "0238281 Marsh, Adam", "bounds_geometry": ["POLYGON((163 -77,163.4 -77,163.8 -77,164.2 -77,164.6 -77,165 -77,165.4 -77,165.8 -77,166.2 -77,166.6 -77,167 -77,167 -77.1,167 -77.2,167 -77.3,167 -77.4,167 -77.5,167 -77.6,167 -77.7,167 -77.8,167 -77.9,167 -78,166.6 -78,166.2 -78,165.8 -78,165.4 -78,165 -78,164.6 -78,164.2 -78,163.8 -78,163.4 -78,163 -78,163 -77.9,163 -77.8,163 -77.7,163 -77.6,163 -77.5,163 -77.4,163 -77.3,163 -77.2,163 -77.1,163 -77))"], "date_created": "Tue, 01 Jan 2008 00:00:00 GMT", "description": "Although we envision the coastal margins of Antarctica as an extreme environment challenging to the existence of life, there are many marine invertebrates that are adapted to live and thrive under the sea ice. For two field seasons, the SCUBA diving activities of this project routinely involved photographing these animals in all the dive locations as a way to document what we observed as the dominant organisms at each site. Ice diving is very strenuous for humans, and often the constraints of managing the work on a dive, monitoring air reserves, tracking proximity to the dive hole, and the 50 minute exposure to subfreezing temperatures limits a divers ability to \"catalog\" observations that are not essential to the current dive plan. The photographs archived here have provided the project\u0027s dive team with the ability to \"debrief\" following a dive and more or less reenact the dive by moving through the photograph images. Studying these images often served as a visual trigger for divers to recall more specific observations and in many cases details in the photographs were captured without the photographer (A. Marsh) realizing that they were there (such as small, cryptic species hiding in a shadow until the strobe light fires for the photo, illuminating these secondary subjects). These photographs are intended to serve as a record of what organisms we encountered in the McMurdo Sound area in 2004 and 2005. All photographs were taken with a Nikon D-70 in a polycarbonate underwater housing using either a 18 mm (wide) or 60 mm (macro) lens.", "east": 167.0, "geometry": ["POINT(165 -77.5)"], "keywords": "Antarctica; Biota; McMurdo Sound; Oceans; Photo/video; Photo/Video; Southern Ocean", "locations": "Antarctica; Southern Ocean; McMurdo Sound", "north": -77.0, "nsf_funding_programs": null, "persons": "Marsh, Adam G.", "project_titles": "CAREER: Genomic Networks for Cold-Adaptation in Embryos of Polar Marine Invertebrates", "projects": [{"proj_uid": "p0000240", "repository": "USAP-DC", "title": "CAREER: Genomic Networks for Cold-Adaptation in Embryos of Polar Marine Invertebrates"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Marine Invertebrates of McMurdo Sound", "uid": "600034", "west": 163.0}, {"awards": "0636724 Blankenship, Donald; 0230197 Holt, John", "bounds_geometry": ["POLYGON((-130 -75,-126.5 -75,-123 -75,-119.5 -75,-116 -75,-112.5 -75,-109 -75,-105.5 -75,-102 -75,-98.5 -75,-95 -75,-95 -75.5,-95 -76,-95 -76.5,-95 -77,-95 -77.5,-95 -78,-95 -78.5,-95 -79,-95 -79.5,-95 -80,-98.5 -80,-102 -80,-105.5 -80,-109 -80,-112.5 -80,-116 -80,-119.5 -80,-123 -80,-126.5 -80,-130 -80,-130 -79.5,-130 -79,-130 -78.5,-130 -78,-130 -77.5,-130 -77,-130 -76.5,-130 -76,-130 -75.5,-130 -75))"], "date_created": "Tue, 01 Jan 2008 00:00:00 GMT", "description": "This data set includes airborne altimetry collected over the catchment and main trunk of Thwaites Glacier, one of Antarctica\u0027s most active ice streams. The airborne altimetry comprises 35,000 line-kilometers sampled at 20 meters along track. The full dataset has an internal error of \u00b120 cm; a primary subset has an error of \u00b18 cm. We find a +20 cm bias with Geoscience Laser Altimeter System data over a flat interior region. These data will serve as an additional temporal reference for the evolution of Thwaites Glacier surface, as well as aid the construction of future high resolution Digital Elevation Models (DEM). Line data are available in space-delimited ASCII format and are available via FTP.", "east": -95.0, "geometry": ["POINT(-112.5 -77.5)"], "keywords": "AGASEA; Airborne Altimetry; Antarctica; Elevation; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Thwaites Glacier", "locations": "Thwaites Glacier; Antarctica", "north": -75.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Young, Duncan A.; Kempf, Scott D.; Blankenship, Donald D.; Holt, John W.; Morse, David L.", "project_titles": "Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System", "projects": [{"proj_uid": "p0000174", "repository": "USAP-DC", "title": "Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.0, "title": "Airborne Laser Altimetry of the Thwaites Glacier Catchment, West Antarctica", "uid": "609334", "west": -130.0}, {"awards": "0229638 Ponganis, Paul", "bounds_geometry": ["POLYGON((163 -77,163.4 -77,163.8 -77,164.2 -77,164.6 -77,165 -77,165.4 -77,165.8 -77,166.2 -77,166.6 -77,167 -77,167 -77.1,167 -77.2,167 -77.3,167 -77.4,167 -77.5,167 -77.6,167 -77.7,167 -77.8,167 -77.9,167 -78,166.6 -78,166.2 -78,165.8 -78,165.4 -78,165 -78,164.6 -78,164.2 -78,163.8 -78,163.4 -78,163 -78,163 -77.9,163 -77.8,163 -77.7,163 -77.6,163 -77.5,163 -77.4,163 -77.3,163 -77.2,163 -77.1,163 -77))"], "date_created": "Tue, 01 Jan 2008 00:00:00 GMT", "description": "The emperor penguin, Aptenodytes forsteri, is the premier avian diver and a top predator in the Antarctic ecosystem. The routine occurrence of 500-m diver during foraging trips to sea is both a physiological and behavior enigma. The objectives of this project address how and why emperors dive as deep and long as they do. The project examines four major topics in the diving biology of emperor penguins: pressure tolerance, oxygen store management, end-organ tolerance of diving hypoxemia/ischemia, and deep-dive foraging behavior. These subjects are relevant to the role of the emperor as a top predator in the Antarctic ecosystem, and to critical concepts in diving physiology, including decompression sickness, nitrogen narcosis, shallow water blackout, hypoxemic tolerance, and extension of aerobic dive time. The following hypotheses will be tested: 1) Prevention of nitrogen narcosis and decompression sickness in emperor penguins is achieved by inhibition of pulmonary gas exchange at depth. 2) Shallow water black out does not occur because of greater cerebral hypoxemic tolerance, and, in deep dives, because of resumption of pulmonary gas exchange during final ascent. 3) The rate of depletion of the blood oxygen store is a function of depth of dive and heart rate. 4) The aerobic dive limit (ADL) reflects the onset of lactate accumulation in locomotory muscle, not total depletion of all oxygen stores. 5) Elevation of tissue antioxidant capacity and free-radical scavenging enzyme activities protect against the routine ischemia/reperfusion which occur during diving. 6) During deep dives, the Antarctic silverfish, Pleuorogramma antarcticum, is the primary prey item for emperors. In addition to evaluation of the hypotheses below, the project has broader impacts in several areas such as partnership with foreign and national institutes and organizations (e.g., the National Institute of Polar Research of Japan, Centro de Investigacioines del Noroeste of Mexico, National Geographic, the University of Texas Southwestern Medical Center, and Sea World). Participation in National Geographic television documentaries will provide unique educational opportunities for the general public; development of state-of-the-art technology (e.g., blood oxygen electrode recorders, blood samplers, and miniaturized digital cameras) will lay the groundwork for future research by this group and others; and the effects of the B15 iceberg on breeding success of emperor penguins will continue to be evaluated with population censuses during planned fieldwork at several Ross Sea emperor penguin colonies.", "east": 167.0, "geometry": ["POINT(165 -77.5)"], "keywords": "Antarctica; Biota; Oceans; Penguin; Southern Ocean", "locations": "Antarctica; Southern Ocean", "north": -77.0, "nsf_funding_programs": null, "persons": "Ponganis, Paul", "project_titles": "Diving Physiology and Behavior of Emperor Penguins", "projects": [{"proj_uid": "p0000239", "repository": "USAP-DC", "title": "Diving Physiology and Behavior of Emperor Penguins"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Diving Physiology and Behavior of Emperor Penguins", "uid": "600031", "west": 163.0}, {"awards": "0127022 Jeffrey, Wade", "bounds_geometry": ["POLYGON((167 -74.4,168.36 -74.4,169.72 -74.4,171.08 -74.4,172.44 -74.4,173.8 -74.4,175.16 -74.4,176.52 -74.4,177.88 -74.4,179.24 -74.4,180.6 -74.4,180.6 -74.735,180.6 -75.07,180.6 -75.405,180.6 -75.74,180.6 -76.075,180.6 -76.41,180.6 -76.745,180.6 -77.08,180.6 -77.415,180.6 -77.75,179.24 -77.75,177.88 -77.75,176.52 -77.75,175.16 -77.75,173.8 -77.75,172.44 -77.75,171.08 -77.75,169.72 -77.75,168.36 -77.75,167 -77.75,167 -77.415,167 -77.08,167 -76.745,167 -76.41,167 -76.075,167 -75.74,167 -75.405,167 -75.07,167 -74.735,167 -74.4))", "POLYGON((159.8 -43.3,161.8 -43.3,163.8 -43.3,165.8 -43.3,167.8 -43.3,169.8 -43.3,171.8 -43.3,173.8 -43.3,175.8 -43.3,177.8 -43.3,179.8 -43.3,179.8 -45.65,179.8 -48,179.8 -50.35,179.8 -52.7,179.8 -55.05,179.8 -57.4,179.8 -59.75,179.8 -62.1,179.8 -64.45,179.8 -66.8,177.8 -66.8,175.8 -66.8,173.8 -66.8,171.8 -66.8,169.8 -66.8,167.8 -66.8,165.8 -66.8,163.8 -66.8,161.8 -66.8,159.8 -66.8,159.8 -64.45,159.8 -62.1,159.8 -59.75,159.8 -57.4,159.8 -55.05,159.8 -52.7,159.8 -50.35,159.8 -48,159.8 -45.65,159.8 -43.3))"], "date_created": "Tue, 01 Jan 2008 00:00:00 GMT", "description": "Data from five research cruises from OPP grant entitled \"Interactive Effects of UV and Vertical Mixing on Phytoplankton and Bacterial Productivity of Ross Sea Phaeocystis Bloom (OPP0127022). The first two cruises were ships of opportunity cruises in the Pacific Ocean, the first collecting data between Valapariso, Chile and San Diego, CA (October 2002). The second and third cruises combined to provide data in a transect from 70 N to 68 S latitude in the Pacific ocean (August - November 2003). The remaining two cruises were to the Ross Sea, the first in December 2004 - January 2005 and the last from October - November 2005. Data presented include microbial biomass (bacterial direct counts) and chlorophyll a concentrations, bacterial production (as leucine or thymidine incorporation), solar irradiance data, CTD profiles, and one set of under water diffuse attenuation coefficients of for the Ross Sea.", "east": 180.6, "geometry": ["POINT(173.8 -76.075)", "POINT(169.8 -55.05)"], "keywords": "Biota; Chemistry:fluid; Chemistry:Fluid; CTD Data; Microbiology; Oceans; Phytoplankton; Ross Sea; Southern Ocean", "locations": "Southern Ocean; Ross Sea", "north": -43.3, "nsf_funding_programs": null, "persons": "Jeffrey, Wade H.", "project_titles": "Collaborative Proposal: Interactive Effects of UV Radiation and Vertical Mixing on Phytoplankton and Bacterial Productivity of Ross See Phaeocystis Blooms", "projects": [{"proj_uid": "p0000578", "repository": "USAP-DC", "title": "Collaborative Proposal: Interactive Effects of UV Radiation and Vertical Mixing on Phytoplankton and Bacterial Productivity of Ross See Phaeocystis Blooms"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.75, "title": "Interactive Effects of UV Radiation and Vertical Mixing on Phytoplankton and Bacterial Productivity of Ross Sea Phaeocystis Blooms", "uid": "600029", "west": 159.8}, {"awards": "0536870 Rogers, Scott", "bounds_geometry": ["POINT(106.8 -72.4667)"], "date_created": "Tue, 01 Jan 2008 00:00:00 GMT", "description": "The large subglacial Lake Vostok in Antarctica is unique ecological site with a novel microbial biota. The temperatures, pressures and lack of light all select for organisms that may not exist anywhere else on Earth. The accretion ice (lake water frozen to the bottom of the lower surface of the glacier) has preserved microbial samples from each region of Lake Vostok as the glacier passes over and into the lake. Thus, without contaminating the lake with microorganisms from the surface, microbes originating from the lake can be collected, transported to the laboratory and studied. Two of the deepest ice cores sections in this project are part of the international allocation. \n\nThe will be shared between four researchers (Sergey Bulat from Russia, Jean-Robert Petit and Daniel Prieur from France, Scott Rogers from USA). The United States team will study, isolate, and characterize bacteria, fungi, and viruses that have been sampled from the lake through the process of ice accretion to the lower surface of 3500+m thick glacier overriding the lake. The project will involve a suite of methods, including molecular, morphological, and cultural. This includes observation and description by fluorescence, light, and electron microscopy, isolation on thirteen separate cultural media, polymerase chain reaction amplification, DNA sequencing, and phylogenetic analyses. Eleven accretion ice core sections, as well as two glacial ice core sections. As well as two glacial ice core sections will be studied. The accretion ice core sections, as well as two glacial ice core sections will be studied. The accretion ice core sections represent all of the major regions of the lake that have been sampled by the accretion process in the vicinity of the Vostok 5G ice core. The broader impacts of the work relate to the impact the results will have on the filed. These long=isolated lakes, deep below the Antarctic ice sheet may contain novel uniquely adapted organisms. Glacial ice contains an enormous diversity of entrapped microbes, some of which may be metabolically active in the ice. The microbes from Lake Vostok are of special interest, since they are adapted to cold, dark, and high pressure. Thus, their enzyme systems and biochemical pathways may be significantly different from those in the microbes that are the subject of current studies. As such, these organisms may form compounds that may have useful applications. Also, study of the accretion ice, and eventually the water, from Lake Vostok will provide a basis for the study of other subglacial lakes. Additionally, study of the microbes in the accretion ice will be useful to those planning to study analogous systems on ice-covered planets and moons.", "east": 106.8, "geometry": ["POINT(106.8 -72.4667)"], "keywords": "Antarctica; Biota; Cryosphere; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Hydrothermal Vent; Lake Vostok; Microbes; Subglacial Lake", "locations": "Antarctica; Lake Vostok", "north": -72.4667, "nsf_funding_programs": null, "persons": "Rogers, Scott O.", "project_titles": "Comprehensive Biological Study of Vostok Accretion Ice", "projects": [{"proj_uid": "p0000566", "repository": "USAP-DC", "title": "Comprehensive Biological Study of Vostok Accretion Ice"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -72.4667, "title": "Comprehensive Biological Study of Vostok Accretion Ice", "uid": "600052", "west": 106.8}, {"awards": "0125579 Cuffey, Kurt", "bounds_geometry": ["POLYGON((160.1 -77.6,160.31 -77.6,160.52 -77.6,160.73 -77.6,160.94 -77.6,161.15 -77.6,161.36 -77.6,161.57 -77.6,161.78 -77.6,161.99 -77.6,162.2 -77.6,162.2 -77.63,162.2 -77.66,162.2 -77.69,162.2 -77.72,162.2 -77.75,162.2 -77.78,162.2 -77.81,162.2 -77.84,162.2 -77.87,162.2 -77.9,161.99 -77.9,161.78 -77.9,161.57 -77.9,161.36 -77.9,161.15 -77.9,160.94 -77.9,160.73 -77.9,160.52 -77.9,160.31 -77.9,160.1 -77.9,160.1 -77.87,160.1 -77.84,160.1 -77.81,160.1 -77.78,160.1 -77.75,160.1 -77.72,160.1 -77.69,160.1 -77.66,160.1 -77.63,160.1 -77.6))"], "date_created": "Sat, 01 Dec 2007 00:00:00 GMT", "description": "This data set provides glacier surface ablation rates for a network of approximately 250 sites on Taylor Glacier, spanning a period from 2003 to 2011. Here sublimation is the dominant ablation mechanism, though a few sites have accumulation. Ablation data are provided in meters water equivalent per year. \n\nData are available via FTP in space-delimited ASCII format.", "east": 162.2, "geometry": ["POINT(161.15 -77.75)"], "keywords": "Ablation Poles; Ablation Rates; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Taylor Glacier", "locations": "Taylor Glacier; Antarctica", "north": -77.6, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Cuffey, Kurt M.; Bliss, Andrew; Kavanaugh, Jeffrey", "project_titles": "Collaborative Research: Dynamics and Climatic Response of the Taylor Glacier System", "projects": [{"proj_uid": "p0000084", "repository": "USAP-DC", "title": "Collaborative Research: Dynamics and Climatic Response of the Taylor Glacier System"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.9, "title": "Ablation Rates of Taylor Glacier, Antarctica", "uid": "609326", "west": 160.1}, {"awards": "0125579 Cuffey, Kurt", "bounds_geometry": ["POLYGON((160 -77.83333,160.3 -77.83333,160.6 -77.83333,160.9 -77.83333,161.2 -77.83333,161.5 -77.83333,161.8 -77.83333,162.1 -77.83333,162.4 -77.83333,162.7 -77.83333,163 -77.83333,163 -77.849997,163 -77.866664,163 -77.883331,163 -77.899998,163 -77.916665,163 -77.933332,163 -77.949999,163 -77.966666,163 -77.983333,163 -78,162.7 -78,162.4 -78,162.1 -78,161.8 -78,161.5 -78,161.2 -78,160.9 -78,160.6 -78,160.3 -78,160 -78,160 -77.983333,160 -77.966666,160 -77.949999,160 -77.933332,160 -77.916665,160 -77.899998,160 -77.883331,160 -77.866664,160 -77.849997,160 -77.83333))"], "date_created": "Sat, 01 Dec 2007 00:00:00 GMT", "description": "This data set contains surface velocities of Taylor Glacier, Antarctica, for the year 2003. Measurement period was approximately 12 months. There are approximately 250 locations in this data set.", "east": 163.0, "geometry": ["POINT(161.5 -77.916665)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Velocity; Taylor Glacier", "locations": "Taylor Glacier; Antarctica", "north": -77.83333, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Cuffey, Kurt M.; Bliss, Andrew; Kavanaugh, Jeffrey; Aciego, Sarah", "project_titles": "Collaborative Research: Dynamics and Climatic Response of the Taylor Glacier System", "projects": [{"proj_uid": "p0000084", "repository": "USAP-DC", "title": "Collaborative Research: Dynamics and Climatic Response of the Taylor Glacier System"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Surface Velocities of Taylor Glacier, Antarctica", "uid": "609324", "west": 160.0}, {"awards": "0125579 Cuffey, Kurt", "bounds_geometry": ["POLYGON((160 -77.83333,160.3 -77.83333,160.6 -77.83333,160.9 -77.83333,161.2 -77.83333,161.5 -77.83333,161.8 -77.83333,162.1 -77.83333,162.4 -77.83333,162.7 -77.83333,163 -77.83333,163 -77.849997,163 -77.866664,163 -77.883331,163 -77.899998,163 -77.916665,163 -77.933332,163 -77.949999,163 -77.966666,163 -77.983333,163 -78,162.7 -78,162.4 -78,162.1 -78,161.8 -78,161.5 -78,161.2 -78,160.9 -78,160.6 -78,160.3 -78,160 -78,160 -77.983333,160 -77.966666,160 -77.949999,160 -77.933332,160 -77.916665,160 -77.899998,160 -77.883331,160 -77.866664,160 -77.849997,160 -77.83333))"], "date_created": "Wed, 28 Nov 2007 00:00:00 GMT", "description": "This data set contains Oxygen and Deuterium isotope ratios for approximately 980 sites on the surface of the ablation zone of Taylor Glacier, Antarctica. The data set gives latitude and longitude of collection, oxygen ratio (18/16) in per mil, and Deuterium ratio (H/D) in per mil. Data are in space-delimited ASCII text format and are available via FTP.", "east": 163.0, "geometry": ["POINT(161.5 -77.916665)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Isotope; Taylor Glacier", "locations": "Taylor Glacier; Antarctica", "north": -77.83333, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Cuffey, Kurt M.; Bliss, Andrew; Kavanaugh, Jeffrey; Aciego, Sarah", "project_titles": "Collaborative Research: Dynamics and Climatic Response of the Taylor Glacier System", "projects": [{"proj_uid": "p0000084", "repository": "USAP-DC", "title": "Collaborative Research: Dynamics and Climatic Response of the Taylor Glacier System"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Stable Isotopes of Ice on the Surface of Taylor Glacier, Antarctica", "uid": "609323", "west": 160.0}, {"awards": "0338359 Saltzman, Eric", "bounds_geometry": ["POINT(-144.39 -89.93)"], "date_created": "Sat, 10 Nov 2007 00:00:00 GMT", "description": "This data set is an analysis of methyl chloride (CH3Cl) and methyl bromide (CH3Br) in Antarctic ice core samples. Investigators reported mixing ratios of methyl chloride gas extracted from samples taken from the South Pole Remote Earth Science and Seismological Observatory (SPRESSO) core, drilled as part of the International Trans Antarctic Science Expedition (ITASE). This data covers an age range of 2159 - 140 years before present (Y.B.P.) where the year 2000 was used as present. Investigators analyzed trace gases in ice core samples from Siple Dome, West Antarctica (dry-drilled C core and deep, fluid-drilled A core) and from South Pole, Antarctica (300 m dry drilled SPRESSO core). Data are available in Microsoft Excel format and are available via FTP.", "east": -144.39, "geometry": ["POINT(-144.39 -89.93)"], "keywords": "Antarctica; Atmosphere; Chemistry:fluid; Chemistry:Fluid; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core; Ice Core Records; ITASE; Paleoclimate; Siple Dome Ice Core; South Pole; SPRESSO; SPRESSO Ice Core", "locations": "Antarctica; South Pole", "north": -89.93, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Saltzman, Eric; Aydin, Murat; Williams, Margaret; Tatum, Cheryl", "project_titles": "Methyl chloride and methyl bromide in Antarctic ice cores", "projects": [{"proj_uid": "p0000032", "repository": "USAP-DC", "title": "Methyl chloride and methyl bromide in Antarctic ice cores"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -89.93, "title": "Antarctic Ice Cores: Methyl Chloride and Methyl Bromide", "uid": "609313", "west": -144.39}, {"awards": "0337891 Brook, Edward J.", "bounds_geometry": ["POINT(158 -77.666667)"], "date_created": "Mon, 05 Nov 2007 00:00:00 GMT", "description": "Using new and existing ice core CO2 data from 65 - 30 ka BP a new chronology for Taylor Dome ice core CO2 is established and synchronized with Greenland ice core records to study how high latitude climate change and the carbon cycle were linked during the last glacial period. The new data and chronology should provide a better target for models attempting to explain CO2 variability and abrupt climate change.", "east": 158.0, "geometry": ["POINT(158 -77.666667)"], "keywords": "Antarctica; Atmosphere; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Paleoclimate; Taylor Dome; Taylor Dome Ice Core", "locations": "Taylor Dome; Antarctica", "north": -77.666667, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Brook, Edward J.; Ahn, Jinho", "project_titles": "Developing Dry Extraction of Ice Core Gases and Application to Millennial-Scale Variability in Atmospheric CO2", "projects": [{"proj_uid": "p0000268", "repository": "USAP-DC", "title": "Developing Dry Extraction of Ice Core Gases and Application to Millennial-Scale Variability in Atmospheric CO2"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Taylor Dome Ice Core", "south": -77.666667, "title": "Atmospheric CO2 and Climate: Taylor Dome Ice Core, Antarctica", "uid": "609315", "west": 158.0}, {"awards": "0125276 Albert, Mary", "bounds_geometry": ["POLYGON((124.0218 -80.5304,124.22264 -80.5304,124.42348 -80.5304,124.62432 -80.5304,124.82516 -80.5304,125.026 -80.5304,125.22684 -80.5304,125.42768 -80.5304,125.62852 -80.5304,125.82936 -80.5304,126.0302 -80.5304,126.0302 -80.55538,126.0302 -80.58036,126.0302 -80.60534,126.0302 -80.63032,126.0302 -80.6553,126.0302 -80.68028,126.0302 -80.70526,126.0302 -80.73024,126.0302 -80.75522,126.0302 -80.7802,125.82936 -80.7802,125.62852 -80.7802,125.42768 -80.7802,125.22684 -80.7802,125.026 -80.7802,124.82516 -80.7802,124.62432 -80.7802,124.42348 -80.7802,124.22264 -80.7802,124.0218 -80.7802,124.0218 -80.75522,124.0218 -80.73024,124.0218 -80.70526,124.0218 -80.68028,124.0218 -80.6553,124.0218 -80.63032,124.0218 -80.60534,124.0218 -80.58036,124.0218 -80.55538,124.0218 -80.5304))"], "date_created": "Thu, 01 Nov 2007 00:00:00 GMT", "description": "This data set contains firn physical properties measured in two meter snow pits and from deeper, 12- to 30-meter firn cores. The physical properties measured in the snow pits include density, permeability and microstructure (grain size and pore size). The physical properties measured on firn cores include density, permeability, diffusivity and microstructure. Data are available in Microsoft Excel format and ADOBE PDF and are available via FTP.", "east": 126.0302, "geometry": ["POINT(125.026 -80.6553)"], "keywords": "Antarctica; East Antarctic Plateau; Glaciology; Physical Properties; Snow/ice; Snow/Ice", "locations": "East Antarctic Plateau; Antarctica", "north": -80.5304, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Albert, Mary R.; Courville, Zoe; Cathles, Mac", "project_titles": "Collaborative Research: Characteristics of Snow Megadunes and Their Potential Effect on Ice Core Interpretation", "projects": [{"proj_uid": "p0000587", "repository": "USAP-DC", "title": "Collaborative Research: Characteristics of Snow Megadunes and Their Potential Effect on Ice Core Interpretation"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.7802, "title": "Snow and Firn Permeability: Characteristics of Snow Megadunes and their Potential Effects on Ice Core Interpretation", "uid": "609299", "west": 124.0218}, {"awards": "0337891 Brook, Edward J.", "bounds_geometry": ["POINT(-119.833611 -80.01)"], "date_created": "Fri, 26 Oct 2007 00:00:00 GMT", "description": "Reconstructions of ancient atmospheric CO2 variations help us better understand how the global carbon cycle and climate are linked. This data set compares CO2 variations on millennial time scales between 20,000 and 90,000 years with an Antarctic temperature proxy and records of abrupt climate change in the Northern hemisphere.", "east": -119.833611, "geometry": ["POINT(-119.833611 -80.01)"], "keywords": "Antarctica; Atmosphere; Byrd Glacier; Byrd Ice Core; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Paleoclimate", "locations": "Antarctica; Byrd Glacier", "north": -80.01, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Brook, Edward J.; Ahn, Jinho", "project_titles": "Developing Dry Extraction of Ice Core Gases and Application to Millennial-Scale Variability in Atmospheric CO2", "projects": [{"proj_uid": "p0000268", "repository": "USAP-DC", "title": "Developing Dry Extraction of Ice Core Gases and Application to Millennial-Scale Variability in Atmospheric CO2"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Byrd Ice Core", "south": -80.01, "title": "Atmospheric CO2 and Climate: Byrd Ice Core, Antarctica", "uid": "609314", "west": -119.833611}, {"awards": "0230260 Bender, Michael", "bounds_geometry": ["POINT(106.8 -72.4667)"], "date_created": "Tue, 10 Jul 2007 00:00:00 GMT", "description": "This data set includes a time scale for the Vostok ice core, retrieved from Vostok Station on the East Antarctic Plateau. This chronology is derived by orbitally tuning to molecular oxygen to nitrogen (O\u003csub\u003e2\u003c/sub\u003e/N\u003csub\u003e2\u003c/sub\u003e) ratios in occluded air for depths deeper than 1550 m (greater than 112,000 years old), and by gas correlation to the Greenland Ice Sheet Project 2 (GISP2) chronology for the ice core section that is shallower than 1422 m (less than 102,000 years old). Because of poor gas preservation in air bubbles in shallower depths, investigators could only constrain the Vostok chronology for the section deeper than 1550 m by O\u003csub\u003e2\u003c/sub\u003e/N\u003csub\u003e2\u003c/sub\u003e. Thus for the shallower section of the core, they synchronized the Vostok delta oxygen-18 (\u0026delta;\u003csup\u003e18\u003c/sup\u003eO) and methane (CH\u003csub\u003e4\u003c/sub\u003e) measurements to those of the GISP2 to obtain the chronology (see Bender, et al. 2006). Note, CH\u003csub\u003e4\u003c/sub\u003e data are not included in this data set.\n\nInvestigators analyzed the O\u003csub\u003e2\u003c/sub\u003e/N\u003csub\u003e2\u003c/sub\u003e and the\u003cem\u003e\u003cstrong\u003e \u003c/strong\u003e\u003c/em\u003e\u0026delta;\u003csup\u003e18\u003c/sup\u003eO record ratios for approximately the past 115,000 to 400,000 years in the Vostok ice core. They combined new measurements for O\u003csub\u003e2\u003c/sub\u003e/N\u003csub\u003e2\u003c/sub\u003e and \u0026delta;\u003csup\u003e18\u003c/sup\u003eO with data from Bender (2002) and Petit, et al. (1999), respectively.\n\nData are in Microsoft Excel format and are available via FTP.", "east": 106.8, "geometry": ["POINT(106.8 -72.4667)"], "keywords": "Antarctica; Atmosphere; Chemistry:fluid; Chemistry:Fluid; Geochronology; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Lake Vostok; Paleoclimate; Vostok; Vostok Ice Core", "locations": "Lake Vostok; Antarctica; Vostok", "north": -72.4667, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Bender, Michael; Suwa, Makoto", "project_titles": "Collaborative Research: Trapped Gas Composition and the Chronology of the Vostok Ice Core", "projects": [{"proj_uid": "p0000257", "repository": "USAP-DC", "title": "Collaborative Research: Trapped Gas Composition and the Chronology of the Vostok Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -72.4667, "title": "Trapped Gas Composition and Chronology of the Vostok Ice Core", "uid": "609311", "west": 106.8}, {"awards": "9526556 Sowers, Todd", "bounds_geometry": ["POINT(-148.3023 -81.403)"], "date_created": "Mon, 09 Jul 2007 00:00:00 GMT", "description": "This data set includes records of the delta carbon-13 (\u0026delta;\u003csup\u003e13\u003c/sup\u003eC) of methane (CH\u003csub\u003e4\u003c/sub\u003e) in firn air from the South Pole and trapped in bubbles in a short ice core from Siple Dome, Antarctica. Using two firn air samples, one from January 1995 and the other from January 2001, investigators reconstructed records of the isotopic composition of paleoatmospheric methane covering the last 2 centuries, from 1820 to 2001. \n\nData are in Microsoft Excel and Microsoft Word formats and are available via FTP.", "east": -148.3023, "geometry": ["POINT(-148.3023 -81.403)"], "keywords": "Antarctica; Atmosphere; Chemistry:fluid; Chemistry:Fluid; Geochemistry; Siple Dome; Snow/ice; Snow/Ice; South Pole", "locations": "South Pole; Antarctica; Siple Dome", "north": -81.403, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Sowers, Todd A.", "project_titles": "Constructing Paleoatmospheric Records of the Isotopic Composition of Methane and Nitrous Oxide", "projects": [{"proj_uid": "p0000611", "repository": "USAP-DC", "title": "Constructing Paleoatmospheric Records of the Isotopic Composition of Methane and Nitrous Oxide"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core", "south": -81.403, "title": "Carbon-13 Isotopic Composition of Atmospheric Methane in Firn Air, South Pole and Siple Dome, Antarctica", "uid": "609310", "west": -148.3023}, {"awards": "9725882 Raymond, Charles", "bounds_geometry": ["POLYGON((-141.6722 -80.1678,-141.34195 -80.1678,-141.0117 -80.1678,-140.68145 -80.1678,-140.3512 -80.1678,-140.02095 -80.1678,-139.6907 -80.1678,-139.36045 -80.1678,-139.0302 -80.1678,-138.69995 -80.1678,-138.3697 -80.1678,-138.3697 -80.4863,-138.3697 -80.8048,-138.3697 -81.1233,-138.3697 -81.4418,-138.3697 -81.7603,-138.3697 -82.0788,-138.3697 -82.3973,-138.3697 -82.7158,-138.3697 -83.0343,-138.3697 -83.3528,-138.69995 -83.3528,-139.0302 -83.3528,-139.36045 -83.3528,-139.6907 -83.3528,-140.02095 -83.3528,-140.3512 -83.3528,-140.68145 -83.3528,-141.0117 -83.3528,-141.34195 -83.3528,-141.6722 -83.3528,-141.6722 -83.0343,-141.6722 -82.7158,-141.6722 -82.3973,-141.6722 -82.0788,-141.6722 -81.7603,-141.6722 -81.4418,-141.6722 -81.1233,-141.6722 -80.8048,-141.6722 -80.4863,-141.6722 -80.1678))"], "date_created": "Fri, 06 Jul 2007 00:00:00 GMT", "description": "This data set consists of surface-based radar measurements, including geometry of the bed, surface, and internal layers, and bed reflectivity measurements at two sites along ice stream margins at Siple Dome, Antarctica. The research is a radar examination of bed reflection characteristics and internal layer geometry in two inter-ice-stream ridges, the Shabtaie Ridge (Ridge D/E) and the Engelhardt Ridge (Ridge B/C), and across margins with the adjacent ice streams, the MacAyeal Ice Stream (Ice Stream E) and the Whillans Ice Stream (Ice Stream B). Investigators collected these radar data from 14 November through 13 December 1998. \n\nData are in Microsoft Word, PDF, ASCII text, MATLAB, binary, and various image formats. Investigators have also provided code for MATLAB routines that they used to view the radar data. Data are available via FTP.", "east": -138.3697, "geometry": ["POINT(-140.02095 -81.7603)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Radar; Siple Dome", "locations": "Antarctica; Siple Dome", "north": -80.1678, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Nereson, Nadine A.; Raymond, Charles", "project_titles": "Internal Stratigraphy and Basal Conditions at the Margins ofActive Ice Streams of the Siple Coast, Antarctica", "projects": [{"proj_uid": "p0000626", "repository": "USAP-DC", "title": "Internal Stratigraphy and Basal Conditions at the Margins ofActive Ice Streams of the Siple Coast, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core", "south": -83.3528, "title": "Radar Investigations of Antarctic Ice Stream Margins, Siple Dome, 1998", "uid": "609303", "west": -141.6722}, {"awards": "0126343 Nishiizumi, Kunihiko", "bounds_geometry": ["POINT(-148.812 -81.6588)"], "date_created": "Thu, 31 May 2007 00:00:00 GMT", "description": "This data set includes a record of cosmogenic radionuclide concentrations in the Siple Dome A ice core collected as part of the West Antarctic ice core program. The investigators measured profiles of both \u003csup\u003e10\u003c/sup\u003eBe (half-life = 1.5x10\u003csup\u003e6\u003c/sup\u003e years) and \u003csup\u003e36\u003c/sup\u003eCl (half-life = 3.0x10\u003csup\u003e5\u003c/sup\u003e years) in the entire ice core, which spans the time period from the present to about 100,000 years before present. These data are being used for perfecting the ice core chronology, deducing the history of solar activity, deducing the history of variations in the geomagnetic field, and studying the possible role of solar variations on climate. \n\nData are distributed as a PDF file and are available via FTP.", "east": -148.812, "geometry": ["POINT(-148.812 -81.6588)"], "keywords": "Antarctica; Geochemistry; Geochronology; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Paleoclimate; Siple Dome; Siple Dome Ice Core", "locations": "Siple Dome; Antarctica", "north": -81.6588, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Finkel, R. C.; Nishiizumi, Kunihiko", "project_titles": "Cosmogenic Radionuclides in the Siple Dome Ice Core", "projects": [{"proj_uid": "p0000358", "repository": "USAP-DC", "title": "Cosmogenic Radionuclides in the Siple Dome Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core", "south": -81.6588, "title": "Cosmogenic Radionuclides in the Siple Dome A Ice Core", "uid": "609307", "west": -148.812}, {"awards": "0229573 Mayewski, Paul", "bounds_geometry": ["POLYGON((-180 -65,-144 -65,-108 -65,-72 -65,-36 -65,0 -65,36 -65,72 -65,108 -65,144 -65,180 -65,180 -67.5,180 -70,180 -72.5,180 -75,180 -77.5,180 -80,180 -82.5,180 -85,180 -87.5,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87.5,-180 -85,-180 -82.5,-180 -80,-180 -77.5,-180 -75,-180 -72.5,-180 -70,-180 -67.5,-180 -65))"], "date_created": "Wed, 04 Apr 2007 00:00:00 GMT", "description": "The Mean Annual Temperature map was calculated by creating a contour map using compiled 10 meter firn temperature data from NSIDC and other mean annual temperature data from both cores and stations.\n\nThe 10 meter data contains temperature measurements dating back to 1957 and the International Geophysical Year, including measurements from several major recent surveys. Data cover the entire continental ice sheet and several ice shelves, but coverage density is generally low.\n\nData are stored in Microsoft Excel and Tagged Image File Format (TIFF), and are available sporadically from 1957 to 2003 via FTP.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Temperature", "locations": "Antarctica", "north": -65.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Dixon, Daniel A.", "project_titles": "A Science Management Office for the U. S. Component of the International Trans Antarctic Expedition (US ITASE SMO)A Collaborative Pgrm of Research from S. Pole to N. Victoria Land", "projects": [{"proj_uid": "p0000199", "repository": "USAP-DC", "title": "A Science Management Office for the U. S. Component of the International Trans Antarctic Expedition (US ITASE SMO)A Collaborative Pgrm of Research from S. Pole to N. Victoria Land"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Antarctic Mean Annual Temperature Map", "uid": "609318", "west": -180.0}, {"awards": "9615502 Harrison, William", "bounds_geometry": ["POINT(-148.822 -81.655)", "POINT(-148.693 -81.595)"], "date_created": "Thu, 22 Feb 2007 00:00:00 GMT", "description": "At the Siple Dome area of Antarctica, much of the ice flow is vertical, which causes vertical ice deformation. To measure this phenomenon, the investigators used a method known as vertical strain rate. This project was a part of the West Antarctic Ice Sheet Cores (WAISCORES) project for deep ice coring in West Antarctica. WAISCORES is supported by the Office of Polar Programs (OPP), National Science Foundation (NSF).\n\nThis data set consists of a table of long-term average strain rates measured between 1999 and 2002 at Siple Dome, Antarctica. The measurements were taken in hot-water boreholes by bridge gauges. Data are available in tab-delimited ASCII text format or PDF via FTP.", "east": -148.693, "geometry": ["POINT(-148.822 -81.655)", "POINT(-148.693 -81.595)"], "keywords": "Antarctica; Geodesy; Geology/Geophysics - Other; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Siple Dome; Siple Dome Ice Core; Strain; WAISCORES", "locations": "Siple Dome; Antarctica", "north": -81.595, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Harrison, William; Morack, James; Waddington, Edwin D.; Pettit, Erin; Zumberge, Mark; Elsberg, Daniel", "project_titles": "Ice Dynamics, the Flow Law, and Vertical Strain at Siple Dome", "projects": [{"proj_uid": "p0000601", "repository": "USAP-DC", "title": "Ice Dynamics, the Flow Law, and Vertical Strain at Siple Dome"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core", "south": -81.655, "title": "Vertical Strain at Siple Dome, Antarctica, 1999-2002", "uid": "609214", "west": -148.822}, {"awards": "0230197 Holt, John", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Mon, 01 Jan 2007 00:00:00 GMT", "description": "This data set includes a nested model, that starts at low resolution for the whole Antarctic Ice Sheet, and then embeds higher resolution data at limited domains. There are at least three levels of nesting: whole, regional, and specific ice streams. Investigators focused on the Thwaites Glacier and the Pine Island Glacier. The model was produced using data from (Holt et al. 2006) and (Vaughan et al. 2006). Data are in Network Common Data Form (NetCDF) format and are available via FTP.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Amundsen Sea; Antarctica; Elevation; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology", "locations": "Antarctica; Amundsen Sea", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Fastook, James L.", "project_titles": "Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica (AGASEA)", "projects": [{"proj_uid": "p0000243", "repository": "USAP-DC", "title": "Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica (AGASEA)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Amundsen Sea Sector Data Set", "uid": "609312", "west": -180.0}, {"awards": "9526566 Bindschadler, Robert", "bounds_geometry": ["POINT(-119.4 -80.01)", "POINT(-174.45 -82.52)", "POINT(-84 -75.9)", "POINT(160.41 -74.21)"], "date_created": "Tue, 28 Nov 2006 00:00:00 GMT", "description": "This data set includes daily, monthly, and yearly mean surface air temperatures for four interior West Antarctic sites between 1978 and 1997. Data include air surface temperatures measured at the Byrd, Lettau, Lynn, and Siple Station automatic weather stations. In addition, because weather stations in Antarctica are difficult to maintain, and resulting multi-decade records are often incomplete, the investigators also calculated surface temperatures from satellite passive microwave brightness temperatures. Calibration of 37-GHz vertically polarized brightness temperature data during periods of known air temperature, using emissivity modeling, allowed the investigators to replace data gaps with calibrated brightness temperatures.\n\nMS Excel data files and GIF images derived from the data are available via ftp from the National Snow and Ice Data Center.", "east": 160.41, "geometry": ["POINT(-119.4 -80.01)", "POINT(-174.45 -82.52)", "POINT(-84 -75.9)", "POINT(160.41 -74.21)"], "keywords": "Antarctica; Atmosphere; Automated Weather Station; Meteorology; Temperature; West Antarctica", "locations": "West Antarctica; Antarctica", "north": -74.21, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Shuman, Christopher A.; Stearns, Charles R.", "project_titles": "Passive Microwave Remote Sensing for Paleoclimate Indicators at Siple Dome, Antarctica", "projects": [{"proj_uid": "p0000191", "repository": "USAP-DC", "title": "Passive Microwave Remote Sensing for Paleoclimate Indicators at Siple Dome, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -82.52, "title": "Decadal-Length Composite West Antarctic Air Temperature Records", "uid": "609097", "west": -174.45}, {"awards": "0125761 Thiemens, Mark", "bounds_geometry": ["POINT(139.2728 -89.9975)"], "date_created": "Wed, 01 Nov 2006 00:00:00 GMT", "description": "This data set contains snow pit measurements of oxygen isotopes, \u003csup\u003e17\u003c/sup\u003eO and \u003csup\u003e18\u003c/sup\u003eO, in nitrate and ion concentrations, and surface measurements of oxygen isotopes in nitrate and in nitrate aerosols from the Amundsen-Scott South Pole Station, Antarctica. The 6-meter snow pit provides investigators with a 25-year record of nitrate isotope variations and ion concentrations for a period spanning from 1979 to 2004. Monthly surface snow and weekly aerosol collections yield a year-long record of nitrate isotopic composition starting 01 December 2003 and ending 31 December 2004.\n\nLittle is known about the past denitrification of the stratosphere in high latitude regions. Such knowledge is important to understanding the chemical state of the ancient atmospheres and evaluating the present climate models. With this research, investigators aim to understand the denitrification of the Antarctic stratosphere and quantify the sources of nitrate aerosols over time.\n\nData are in Microsoft Excel format and are available via FTP.", "east": 139.2728, "geometry": ["POINT(139.2728 -89.9975)"], "keywords": "Aerosol; Antarctica; Atmosphere; Chemistry:fluid; Chemistry:Fluid; Geochemistry; NBP1502; Snow/ice; Snow/Ice; South Pole Station", "locations": "South Pole Station; Antarctica", "north": -89.9975, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Thiemens, Mark H.; Savarino, Joel", "project_titles": "South Pole Atmospheric Nitrate Isotopic Analysis (SPANIA)", "projects": [{"proj_uid": "p0000242", "repository": "USAP-DC", "title": "South Pole Atmospheric Nitrate Isotopic Analysis (SPANIA)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -89.9975, "title": "Atmospheric Nitrate Isotopic Analysis at Amundsen-Scott South Pole Station, A Twenty-Five Year Record", "uid": "609281", "west": 139.2728}, {"awards": "0230197 Holt, John", "bounds_geometry": ["POLYGON((-134.9 -71.7,-129.86 -71.7,-124.82 -71.7,-119.78 -71.7,-114.74 -71.7,-109.7 -71.7,-104.66 -71.7,-99.62 -71.7,-94.58 -71.7,-89.54 -71.7,-84.5 -71.7,-84.5 -72.7,-84.5 -73.7,-84.5 -74.7,-84.5 -75.7,-84.5 -76.7,-84.5 -77.7,-84.5 -78.7,-84.5 -79.7,-84.5 -80.7,-84.5 -81.7,-89.54 -81.7,-94.58 -81.7,-99.62 -81.7,-104.66 -81.7,-109.7 -81.7,-114.74 -81.7,-119.78 -81.7,-124.82 -81.7,-129.86 -81.7,-134.9 -81.7,-134.9 -80.7,-134.9 -79.7,-134.9 -78.7,-134.9 -77.7,-134.9 -76.7,-134.9 -75.7,-134.9 -74.7,-134.9 -73.7,-134.9 -72.7,-134.9 -71.7))"], "date_created": "Wed, 25 Oct 2006 00:00:00 GMT", "description": "This data set includes 5 km gridded data from the Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica (AGASEA) conducted during the 2004-2005 austral summer. Investigators derived maps of the ice sheet surface and subglacial topography, which covers the entire catchments of both the Thwaites Glacier and the Pine Islands Glacier, from airborne survey systems mounted on a Twin Otter aircraft. The surveys had sufficient density to identify critical ice dynamic transitions within the Amundsen Sea Embayment (ASE). \n\nThe ASE is the only major drainage to exhibit significant elevation change over the period of available satellite observations. Modeling of the Western Antarctic Ice Sheet (WAIS) deglaciation pinpointed the Pine Island Glacier and the Thwaites Glacier, which comprise a major portion of the ASE, as the most vulnerable features of the WAIS. Present knowledge of the ice thickness and subglacial boundary conditions in the ASE are insufficient to understand its evolution or its sensitivity to climatic change, and it is not yet determined whether these changes are evidence of ongoing deglaciation or simply a fluctuation that does not threaten the equilibrium of the ice sheet. This research will support the efforts of a community of United States and international researchers to assess the present and predict the future behavior of the ice sheet in the ASE. \n\nThese data are available via FTP.", "east": -84.5, "geometry": ["POINT(-109.7 -76.7)"], "keywords": "AGASEA; Airborne Radar; Amundsen Sea; Antarctica; Elevation; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Solid Earth", "locations": "Antarctica; Amundsen Sea", "north": -71.7, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Holt, John W.; Blankenship, Donald D.; Morse, David L.; Vaughan, David G.; Corr, Hugh F. J.; Young, Duncan A.", "project_titles": "Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica (AGASEA)", "projects": [{"proj_uid": "p0000243", "repository": "USAP-DC", "title": "Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica (AGASEA)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -81.7, "title": "Subglacial Topography: Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica", "uid": "609292", "west": -134.9}, {"awards": "0225992 Fahnestock, Mark; 0125570 Scambos, Ted", "bounds_geometry": ["POLYGON((124.4345 -80.77546,124.443718 -80.77546,124.452936 -80.77546,124.462154 -80.77546,124.471372 -80.77546,124.48059 -80.77546,124.489808 -80.77546,124.499026 -80.77546,124.508244 -80.77546,124.517462 -80.77546,124.52668 -80.77546,124.52668 -80.776922,124.52668 -80.778384,124.52668 -80.779846,124.52668 -80.781308,124.52668 -80.78277,124.52668 -80.784232,124.52668 -80.785694,124.52668 -80.787156,124.52668 -80.788618,124.52668 -80.79008,124.517462 -80.79008,124.508244 -80.79008,124.499026 -80.79008,124.489808 -80.79008,124.48059 -80.79008,124.471372 -80.79008,124.462154 -80.79008,124.452936 -80.79008,124.443718 -80.79008,124.4345 -80.79008,124.4345 -80.788618,124.4345 -80.787156,124.4345 -80.785694,124.4345 -80.784232,124.4345 -80.78277,124.4345 -80.781308,124.4345 -80.779846,124.4345 -80.778384,124.4345 -80.776922,124.4345 -80.77546))"], "date_created": "Thu, 05 Oct 2006 00:00:00 GMT", "description": "The Antarctic megadune research was conducted during two field seasons, one in November 2002 and the other during the period of December 2003 through January 2004. The megadune field site is located on the East Antarctic Plateau, southeast of Vostok station. The objectives of this multi-facetted research are 1) to determine the physical characteristics of the firn across the dunes including typical climate indicators such as stable isotopes and major chemical species and 2) to install instruments to measure the time variation of near-surface wind and temperature with depth, to test and refine hypotheses for megadune formation. It is important to improve our current understanding of the megadunes because of their extreme nature, their broad extent, and their potential impact on the climate record. Megadunes are a manifestation of an extreme terrestrial climate and may provide insight on the past terrestrial climate or on processes active on other planets.\n\nSnow megadunes are undulating variations in accumulation and surface texture with wavelengths of 2 to 5 km and amplitudes up to 5 meters. The features cover 500,000 km\u003csup\u003e2\u003c/sup\u003e of the East Antarctic plateau, occurring in areas of moderate regional slope and low accumulation on the flanks of the ice sheet between 2500 and 3800 meters elevation. Landsat images and aerial photography indicate the dunes consist of alternating surfaces of glaze and rough sastrugi, with gradational boundaries. This pattern is oriented perpendicular to the mean wind direction, as modeled in katabatic wind studies. Glazed surfaces cover the leeward faces and troughs; rough sastrugi cover the windward faces and crests. The megadune pattern is crossed by smooth to eroded wind-parallel longitudinal dunes. Wind-eroded longitudinal dunes form spectacular 1-meter-high sastrugi in nearby areas.\n\nThis data set contains automated weather station (AWS) data from two sites. The Mac site was oriented on the rough sastrugi-covered windward face and the Zoe site was on the glazed leeward face. The AWSs collected data throughout the year from 16 January 2004 to 17 November 2004. Investigators received data from the two field sites via the ARGOS Satellite System (http://www.argosinc.com/). Data are provided in space-delimited ASCII text format and are available via FTP.", "east": 124.52668, "geometry": ["POINT(124.48059 -80.78277)"], "keywords": "Antarctica; Atmosphere; East Antarctic Plateau; Glaciers/ice Sheet; Glaciers/Ice Sheet; Meteorology; Snow/ice; Snow/Ice", "locations": "Antarctica; East Antarctic Plateau", "north": -80.77546, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Fahnestock, Mark; Scambos, Ted; Haran, Terry; Bauer, Rob", "project_titles": "Collaborative Research: Characteristics of Snow Megadunes and Their Potential Effect on Ice Core Interpretation", "projects": [{"proj_uid": "p0000587", "repository": "USAP-DC", "title": "Collaborative Research: Characteristics of Snow Megadunes and Their Potential Effect on Ice Core Interpretation"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.79008, "title": "AWS Data: Characteristics of Snow Megadunes and Their Potential Effect on Ice Core Interpretation", "uid": "609283", "west": 124.4345}, {"awards": "9725305 Severinghaus, Jeffrey; 0230260 Bender, Michael; 0230452 Severinghaus, Jeffrey", "bounds_geometry": ["POINT(-148.767 -80.667)", "POINT(0 -90)"], "date_created": "Thu, 17 Aug 2006 00:00:00 GMT", "description": "This data set includes gas ratios in polar firn air: O\u003csub\u003e2\u003c/sub\u003e/N\u003csub\u003e2\u003c/sub\u003e, \u003csup\u003e15\u003c/sup\u003eN/\u003csup\u003e14\u003c/sup\u003eN, \u003csup\u003e40\u003c/sup\u003eAr/N\u003csub\u003e2\u003c/sub\u003e, \u003csup\u003e40\u003c/sup\u003eAr/\u003csup\u003e36\u003c/sup\u003eAr, \u003csup\u003e40\u003c/sup\u003eAr/\u003csup\u003e38\u003c/sup\u003eAr, \u003csup\u003e84\u003c/sup\u003eKr/\u003csup\u003e36\u003c/sup\u003eAr, \u003csup\u003e132\u003c/sup\u003eXe/\u003csup\u003e36\u003c/sup\u003eAr, and \u003csup\u003e22\u003c/sup\u003eNe/\u003csup\u003e36\u003c/sup\u003eAr. Investigators sampled air from the permeable snowpack (firn) layer at two sites: Siple Dome, Antarctica in 1996 and at the South Pole in 2001. They observed and modeled the processes of gravitational settling, thermal fractionation, and preferential exclusion of small gas molecules from closed air bubbles. The purpose of this study was to understand these physical processes, which affect the composition of bubbles trapped in ice. By measuring these gas ratios in the ancient air preserved in bubbles trapped in ice, researchers can determine past atmospheric composition and local temperature changes along with the relative timing and magnitude of such events.\n\nThe data file is available in Microsoft Excel format. The research paper is available in PDF. Data and the research paper are available via FTP.", "east": 0.0, "geometry": ["POINT(-148.767 -80.667)", "POINT(0 -90)"], "keywords": "Antarctica; Atmosphere; Chemistry:fluid; Chemistry:Fluid; Geochemistry; Glaciology; Paleoclimate; Siple Dome; Snow/ice; Snow/Ice; South Pole", "locations": "South Pole; Siple Dome; Antarctica", "north": -80.667, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Severinghaus, Jeffrey P.; Battle, Mark; Bender, Michael", "project_titles": "Collaborative Research: Trapped Gas Composition and the Chronology of the Vostok Ice Core", "projects": [{"proj_uid": "p0000257", "repository": "USAP-DC", "title": "Collaborative Research: Trapped Gas Composition and the Chronology of the Vostok Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core", "south": -90.0, "title": "Firn Air Inert Gas and Oxygen Observations from Siple Dome, 1996, and the South Pole, 2001", "uid": "609290", "west": -148.767}, {"awards": null, "bounds_geometry": null, "date_created": "Thu, 15 Jun 2006 00:00:00 GMT", "description": "CUB shear velocity model is created from a large data set of the surface wave fundamental model phase and group velocity measurements. Phase velocities in period range between 40 an 150 s are generously donated by Harvard University and Utrecht University. These phase velocity data sets are described by Ekstr\u00f6m et al. (1997) and Trampert and Woodhouse (1995). The group velocity measurements at periods between 16 and 200s are performed at the Center for Imaging the Earth\u0027s Interior in the University of Colorado at Boulder. The group velocities are measured with the frequency-time analysis (Levshin et al., 1989) in which for every waveform a human analyst defines the frequency range of measurements and separate the signal form a variety of noise sources (e.g., overtones, fundamental modes of different types, other earthquakes, multipaths, scattered arrivals). We used broadband waveforms following earthquakes occurred from 1997 to present and recorded at stations from both global networks (GDSN, GSN, GEOSCOPE) as well as temporary regional arrays. At present, the group velocity dataset is composed of about 200000 paths.\n\nData coverage is generally better for Rayleigh waves than for Love waves, is better at intermediate periods than at very short or very long periods, and is better in the northern than in the southern hemisphere. This heterogeneous data coverage is imposed by the distribution of seismic stations and earthquakes. Data coverage optimizes in Eurasia and is currently worst across Africa, the central Pacific, parts of the Indian Ocean, and Antarctica.", "east": null, "geometry": null, "keywords": null, "locations": null, "north": null, "nsf_funding_programs": null, "persons": "Ritzwoller, Michael", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": null, "title": "Upper Mantle Shear Velocity Model", "uid": "600004", "west": null}, {"awards": "0125276 Albert, Mary", "bounds_geometry": ["POLYGON((124.0218 -80.5304,124.22264 -80.5304,124.42348 -80.5304,124.62432 -80.5304,124.82516 -80.5304,125.026 -80.5304,125.22684 -80.5304,125.42768 -80.5304,125.62852 -80.5304,125.82936 -80.5304,126.0302 -80.5304,126.0302 -80.55538,126.0302 -80.58036,126.0302 -80.60534,126.0302 -80.63032,126.0302 -80.6553,126.0302 -80.68028,126.0302 -80.70526,126.0302 -80.73024,126.0302 -80.75522,126.0302 -80.7802,125.82936 -80.7802,125.62852 -80.7802,125.42768 -80.7802,125.22684 -80.7802,125.026 -80.7802,124.82516 -80.7802,124.62432 -80.7802,124.42348 -80.7802,124.22264 -80.7802,124.0218 -80.7802,124.0218 -80.75522,124.0218 -80.73024,124.0218 -80.70526,124.0218 -80.68028,124.0218 -80.6553,124.0218 -80.63032,124.0218 -80.60534,124.0218 -80.58036,124.0218 -80.55538,124.0218 -80.5304))"], "date_created": "Sat, 10 Jun 2006 00:00:00 GMT", "description": "The Antarctic megadune research was conducted during two field seasons, one in November 2002 and the other in December 2003 through January 2004. The megadune field site is located on the East Antarctic Plateau, southeast of Vostok station. The objectives of this multi-facetted research are to determine the physical characteristics of the firn across the dunes including typical climate indicators such as stable isotopes and major chemical species and to install instruments to measure the time variation of near-surface wind and temperature with depth, to test and refine hypotheses for megadune formation. It is important to improve our current understanding of the megadunes because of their extreme nature, their broad extent, and their potential impact on the climate record. Megadunes are a manifestation of an extreme terrestrial climate and may provide insight on past terrestrial climate or on processes active on other planets.\n\nSnow megadunes are undulating variations in accumulation and surface texture with wavelengths of 2 to 5 km and amplitudes up to 5 meters. The features cover 500,000 km\u003csup\u003e2\u003c/sup\u003e of the East Antarctic plateau, occurring in areas of moderate regional slope and low accumulation on the flanks of the ice sheet between 2500 and 3800 meters elevation. Landsat images and aerial photography indicate the dunes consist of alternating surfaces of glaze and rough sastrugi, with gradational boundaries. This pattern is oriented perpendicular to the mean wind direction, as modeled in katabatic wind studies. Glaze surfaces cover the leeward faces and troughs; rough sastrugi cover the windward faces and crests. The megadune pattern is crossed by smooth to eroded wind-parallel longitudinal dunes. Wind-eroded longitudinal dunes form spectacular 1-meter-high sastrugi in nearby areas.\n\nThis data set contains ground penetrating radar (GPR) data showing surface morphology and internal layering structure along with global positioning system (GPS) data collected within an area of 60 km\u003csup\u003e2\u003c/sup\u003e. GPS data are provided in space-delimited ASCII text Microsoft Excel formats, while GPR data are in JPEG format. Data are available via FTP.", "east": 126.0302, "geometry": ["POINT(125.026 -80.6553)"], "keywords": "Antarctica; East Antarctic Plateau; Glaciology; GPR; GPS; Navigation; Paleoclimate; Snow/ice; Snow/Ice", "locations": "Antarctica; East Antarctic Plateau", "north": -80.5304, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Scambos, Ted; Bauer, Rob", "project_titles": "Collaborative Research: Characteristics of Snow Megadunes and Their Potential Effect on Ice Core Interpretation", "projects": [{"proj_uid": "p0000587", "repository": "USAP-DC", "title": "Collaborative Research: Characteristics of Snow Megadunes and Their Potential Effect on Ice Core Interpretation"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.7802, "title": "GPR and GPS Data: Characteristics of Snow Megadunes and their Potential Effects on Ice Core Interpretation", "uid": "609282", "west": 124.0218}, {"awards": null, "bounds_geometry": null, "date_created": "Fri, 12 May 2006 00:00:00 GMT", "description": "The data set include a table summary of the distribution of the authigenic vs. detrital smectite, zeolites, and other authigenic minerals within the extent of drill core-3 of the Cape Roberts Project ranging from 22.40 to 902.64 meters below sea-floor. Also included in this table are summaries of unit and interval lithologic descriptions along with corresponding environments of deposition, provided by the Cape Roberts Science Team, 2000. In addition, the data set includes numerous micrographs of fracture samples from CRP-3 used in the investigation.", "east": null, "geometry": null, "keywords": null, "locations": null, "north": null, "nsf_funding_programs": null, "persons": "Priestas, Anthony M.", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": null, "title": "Cape Roberts Core-3 Authigenic Clays", "uid": "600018", "west": null}, {"awards": "9909518 Raymond, Charles", "bounds_geometry": ["POLYGON((-158 -81,-155.6 -81,-153.2 -81,-150.8 -81,-148.4 -81,-146 -81,-143.6 -81,-141.2 -81,-138.8 -81,-136.4 -81,-134 -81,-134 -81.3,-134 -81.6,-134 -81.9,-134 -82.2,-134 -82.5,-134 -82.8,-134 -83.1,-134 -83.4,-134 -83.7,-134 -84,-136.4 -84,-138.8 -84,-141.2 -84,-143.6 -84,-146 -84,-148.4 -84,-150.8 -84,-153.2 -84,-155.6 -84,-158 -84,-158 -83.7,-158 -83.4,-158 -83.1,-158 -82.8,-158 -82.5,-158 -82.2,-158 -81.9,-158 -81.6,-158 -81.3,-158 -81))"], "date_created": "Thu, 15 Dec 2005 00:00:00 GMT", "description": "These data consist of ground-based, ice-penetrating radar profiles across satellite-detected lineations and terrains that were taken in the lower reaches of Ross Ice Stream C, also known as the Kamb Ice Stream (KIS); on Roosevelt Island; on the Siple Dome; and on the Shabtaie Ice Ridge.", "east": -134.0, "geometry": ["POINT(-146 -82.5)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Radar; Siple Coast", "locations": "Antarctica; Siple Coast", "north": -81.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Raymond, Charles; Conway, Howard; Catania, Ginny", "project_titles": "Collaborative Research:History and Evolution of the Siple Coast Ice Stream Systems as Recorded by Former Shear-Margin Scars", "projects": [{"proj_uid": "p0000275", "repository": "USAP-DC", "title": "Collaborative Research:History and Evolution of the Siple Coast Ice Stream Systems as Recorded by Former Shear-Margin Scars"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -84.0, "title": "Compilation of Antarctic Radar Data, Siple Coast, 2000-2002", "uid": "609274", "west": -158.0}, {"awards": "0338359 Saltzman, Eric", "bounds_geometry": ["POINT(-148.81 -81.65)"], "date_created": "Wed, 16 Nov 2005 00:00:00 GMT", "description": "This data set is part of the WAISCORES (West Antarctic Ice Sheet cores) project, research funded by the National Science Foundation (NSF) and designed to improve understanding of how the West Antarctic ice sheet influences climate and sea level change. WAISCORES investigators acquired and analyzed ice cores from the Siple Dome, in the Siple Coast region, West Antarctica. These data provide researchers with a record of natural climatic variability and anthropogenic influence on biogeochemical cycles. Because ice cores contain an archive of preindustrial air, a baseline can be established, and the extent of human impact on the climate can be ascertained. \n\nThis data set includes mixing ratios of carbonyl sulfide (COS), methyl chloride (CH3Cl), and methyl bromide (CH3Br). Data samples were retrieved from the Siple C ice core, which was drilled at 81.65\u00b0 S, 148.81\u00b0 W in December 1995. The core site sits 620 m above sea level near the edge of the Ross Ice Shelf where there is a mean annual temperature of -25.4 \u00b0C.\n\nData are available via FTP.", "east": -148.81, "geometry": ["POINT(-148.81 -81.65)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Paleoclimate; Siple Dome; Siple Dome Ice Core; WAISCORES", "locations": "Antarctica; Siple Dome", "north": -81.65, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Saltzman, Eric; Aydin, Murat", "project_titles": "Methyl chloride and methyl bromide in Antarctic ice cores", "projects": [{"proj_uid": "p0000032", "repository": "USAP-DC", "title": "Methyl chloride and methyl bromide in Antarctic ice cores"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core", "south": -81.65, "title": "Analysis of Siple Dome Ice Core: Carbonyl Sulfide (COS), Methyl Chloride (CH3Cl), and Methyl Bromide (CH3Br)", "uid": "609279", "west": -148.81}, {"awards": "XXXXXXX Palais, Julie", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Wed, 02 Nov 2005 00:00:00 GMT", "description": "The MODIS Mosaic of Antarctica 2003-2004 (MOA2004) Image Map consists of two cloud-free digital image maps that show mean surface morphology and a quantitative measure of optical snow grain size on the Antarctic continent and surrounding islands. The 260 orbit swaths used to create the 2003/2004 MOA Surface Morphology Image Map and the 2003/2004 MOA Grain Size Image Map were acquired 20 November 2003 through 29 February 2004 by the Moderate Resolution Imaging Spectroradiometer (MODIS) instruments on board the NASA EOS Aqua and Terra satellites. The 122 orbit swaths used to create the 2003 MOA Grain Size Image Map were acquired 1 November 2003 through 17 December 2003. Vector data sets with the corresponding coastlines, ice sheet grounding lines, and islands are also provided.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; MODIS; Sample/collection Description; Sample/Collection Description; Solid Earth", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Haran, Terry; Bohlander, Jennifer; Scambos, Ted; Painter, Thomas; Fahnestock, Mark", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -90.0, "title": "MODIS Mosaic of Antarctica 2003-2004 (MOA2004) Image Map", "uid": "609280", "west": -180.0}, {"awards": "9909167 Rust, David", "bounds_geometry": null, "date_created": "Wed, 19 Oct 2005 00:00:00 GMT", "description": null, "east": null, "geometry": null, "keywords": null, "locations": null, "north": null, "nsf_funding_programs": null, "persons": "Rust, David M.", "project_titles": "Flare Genesis Experiment", "projects": [{"proj_uid": "p0000245", "repository": "USAP-DC", "title": "Flare Genesis Experiment"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Solar Magnetograms and Filtergrams", "uid": "600022", "west": null}, {"awards": "9316564 Mayewski, Paul", "bounds_geometry": ["POINT(-116.333 -78.733)", "POINT(-119.562 -80.014)", "POINT(-118.045 -79.461)"], "date_created": "Mon, 09 May 2005 00:00:00 GMT", "description": "The Ross Ice Drainage System (RIDS) project provides a high-resolution record of atmospheric chemical deposition taken from several ice cores and snow pits located at sites within or immediately adjacent to the Ross Ice Drainage System. Three sites were visited during a 1995 traverse in inland West Antarctica. The traverse was 158 km, trending 26\u00b0 from Byrd Surface Camp. The core from site A (78\u00b044\u0027S, 116\u00b020\u0027W) is 148 m deep, the core from site B (79\u00b027.66\u0027S, 118\u00b002.68\u0027W) is 60 m deep, and the core from site C (80\u00b000.85\u0027S, 119\u00b033.73\u0027W) is 60 m deep. Glaciochemical analysis focuses on the major ions deposited from the antarctic atmosphere, including Na (sodium), NH4 (ammonium), K (potassium), Mg (magnesium), Ca (calcium), Cl (chloride), NO3 (nitrate), and SO4 (sulfate). Chemical analysis also includes methanesulfonic acid (MSA) and nssSO4 (non-sea salt sulfate). The data are available by FTP in ASCII text format and Excel files.", "east": -116.333, "geometry": ["POINT(-116.333 -78.733)", "POINT(-119.562 -80.014)", "POINT(-118.045 -79.461)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Paleoclimate; Snow/ice; Snow/Ice; Snow Pit", "locations": "Antarctica", "north": -78.733, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Mayewski, Paul A.; Kreutz, Karl; Twickler, Mark; Whitlow, Sallie; Meeker, Loren D.", "project_titles": "Ross Ice Drainage System (RIDS) Late Holocene Climate Variability", "projects": [{"proj_uid": "p0000145", "repository": "USAP-DC", "title": "Ross Ice Drainage System (RIDS) Late Holocene Climate Variability"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.014, "title": "Ross Ice Drainage System (RIDS) Glaciochemical Analysis", "uid": "609266", "west": -119.562}, {"awards": "0088035 Arcone, Steven", "bounds_geometry": ["POLYGON((-135 -75,-130.5 -75,-126 -75,-121.5 -75,-117 -75,-112.5 -75,-108 -75,-103.5 -75,-99 -75,-94.5 -75,-90 -75,-90 -76.5,-90 -78,-90 -79.5,-90 -81,-90 -82.5,-90 -84,-90 -85.5,-90 -87,-90 -88.5,-90 -90,-94.5 -90,-99 -90,-103.5 -90,-108 -90,-112.5 -90,-117 -90,-121.5 -90,-126 -90,-130.5 -90,-135 -90,-135 -88.5,-135 -87,-135 -85.5,-135 -84,-135 -82.5,-135 -81,-135 -79.5,-135 -78,-135 -76.5,-135 -75))"], "date_created": "Sun, 01 May 2005 00:00:00 GMT", "description": "This data set includes data from radar profiles that were recorded between core sites during the November-December seasons for 1999-2002. Data were collected using an ice-penetrating radar to survey the ice sheet. Ice thickness data are available for a portion of the West Antarctic Ice Sheet. This study is part of the U.S. participation in the International Trans-Antarctic Scientific Expedition (US ITASE). Elevation data are available in Excel and Microsoft Access database format.", "east": -90.0, "geometry": ["POINT(-112.5 -82.5)"], "keywords": "Airborne Radar; Antarctica; Elevation; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; ITASE; Radar; WAIS", "locations": "Antarctica; WAIS", "north": -75.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Arcone, Steven", "project_titles": "High Resolution Radar Profiling of the Snow and Ice Stratigraphy beneath the ITASE Traverses, West Antarctic Ice Sheet", "projects": [{"proj_uid": "p0000146", "repository": "USAP-DC", "title": "High Resolution Radar Profiling of the Snow and Ice Stratigraphy beneath the ITASE Traverses, West Antarctic Ice Sheet"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "US International Trans-Antarctic Scientific Expedition 400 MHz Subsurface Radar Profiles", "uid": "609254", "west": -135.0}, {"awards": "9814574 Jacobel, Robert", "bounds_geometry": ["POLYGON((-120 -80,-115.6 -80,-111.2 -80,-106.8 -80,-102.4 -80,-98 -80,-93.6 -80,-89.2 -80,-84.8 -80,-80.4 -80,-76 -80,-76 -81,-76 -82,-76 -83,-76 -84,-76 -85,-76 -86,-76 -87,-76 -88,-76 -89,-76 -90,-80.4 -90,-84.8 -90,-89.2 -90,-93.6 -90,-98 -90,-102.4 -90,-106.8 -90,-111.2 -90,-115.6 -90,-120 -90,-120 -89,-120 -88,-120 -87,-120 -86,-120 -85,-120 -84,-120 -83,-120 -82,-120 -81,-120 -80))"], "date_created": "Fri, 08 Apr 2005 00:00:00 GMT", "description": "Ice thickness and internal layer depth data were collected with a ground-based, ice-penetrating radar study as part of the US International Trans-Antarctic Scientific Expedition (US ITASE) traverse in West Antarctica from 01 November 2001 to 10 January 2003. Longitude, latitude, ice thickness, and depth to a prominent internal reflector were collected at approximately 12 m intervals. Ice thickness values are reported for approximately 90% of the traverse, and internal layer depth values are reported for approximately 80% of the traverse. Data are avaialble in ASCII and JPEG formats via FTP.", "east": -76.0, "geometry": ["POINT(-98 -85)"], "keywords": "Airborne Radar; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; ITASE; WAIS", "locations": "WAIS; Antarctica", "north": -80.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Jacobel, Robert", "project_titles": "Radar Studies of Internal Stratigraphy and Bedrock Topography along the US ITASE Traverse", "projects": [{"proj_uid": "p0000595", "repository": "USAP-DC", "title": "Radar Studies of Internal Stratigraphy and Bedrock Topography along the US ITASE Traverse"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "ITASE", "south": -90.0, "title": "Ice Thickness and Internal Layer Depth Along the 2001 and 2002 US ITASE Traverses", "uid": "609264", "west": -120.0}, {"awards": "0096299 Mayewski, Paul; 0229573 Mayewski, Paul; 0196441 Hamilton, Gordon; 0088035 Arcone, Steven", "bounds_geometry": ["POLYGON((-123.993 -77.6832,-123.6019 -77.6832,-123.2108 -77.6832,-122.8197 -77.6832,-122.4286 -77.6832,-122.0375 -77.6832,-121.6464 -77.6832,-121.2553 -77.6832,-120.8642 -77.6832,-120.4731 -77.6832,-120.082 -77.6832,-120.082 -77.7232,-120.082 -77.7632,-120.082 -77.8032,-120.082 -77.8432,-120.082 -77.8832,-120.082 -77.9232,-120.082 -77.9632,-120.082 -78.0032,-120.082 -78.0432,-120.082 -78.0832,-120.4731 -78.0832,-120.8642 -78.0832,-121.2553 -78.0832,-121.6464 -78.0832,-122.0375 -78.0832,-122.4286 -78.0832,-122.8197 -78.0832,-123.2108 -78.0832,-123.6019 -78.0832,-123.993 -78.0832,-123.993 -78.0432,-123.993 -78.0032,-123.993 -77.9632,-123.993 -77.9232,-123.993 -77.8832,-123.993 -77.8432,-123.993 -77.8032,-123.993 -77.7632,-123.993 -77.7232,-123.993 -77.6832))"], "date_created": "Wed, 06 Apr 2005 00:00:00 GMT", "description": "Snow accumulation rates typically show high variability over short distances. This data set contains accumulation rates derived from ground-penetrating radar (GPR) used to detect isochronal layers in the firn in West Antarctica. These layers were then dated using results from ice core analyses. These data show that accumulation rates along this profile have decreased in recent decades. The radar profile extends between two ice core sites taken along one of the US-ITASE traverse routes.", "east": -120.082, "geometry": ["POINT(-122.0375 -77.8832)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; ITASE; WAIS", "locations": "Antarctica; WAIS", "north": -77.6832, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Spikes, Vandy Blue; Hamilton, Gordon S.; Mayewski, Paul A.; Arcone, Steven; Kaspari, Susan", "project_titles": "High Resolution Radar Profiling of the Snow and Ice Stratigraphy beneath the ITASE Traverses, West Antarctic Ice Sheet", "projects": [{"proj_uid": "p0000146", "repository": "USAP-DC", "title": "High Resolution Radar Profiling of the Snow and Ice Stratigraphy beneath the ITASE Traverses, West Antarctic Ice Sheet"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "ITASE", "south": -78.0832, "title": "US International Trans-Antarctic Scientific Expedition (US ITASE): GPR Profiles and Accumulation Mapping", "uid": "609269", "west": -123.993}, {"awards": null, "bounds_geometry": null, "date_created": "Wed, 06 Apr 2005 00:00:00 GMT", "description": "This data set consists of cosmogenic nuclide concentrations in samples from bedrock surfaces in the Ford Ranges, Marie Byrd Land, West Antarctica. These surfaces have been exposed by ice retreat since the last glacial maximum, approximately 10,500 years ago. However, the majority of samples contain nuclide concentrations indicating much longer and more complicated exposure histories. The primary data are concentrations of the cosmic-ray-produced nuclides Be-10 and Al-26 measured in quartz, and Cl-36 measured in K-feldspar, sample locations, and the duration of recent exposure inferred from measurements on co-existing glacial erratics. In addition, the data set contains detailed information about the sites and samples, chemical compositions of the minerals analyzed and compositions of the host rocks, as required to compute nuclide production rates. This information is provided so that the data can be re-interpreted if nuclide production rates or correction factors are revised in future.", "east": null, "geometry": null, "keywords": null, "locations": null, "north": null, "nsf_funding_programs": null, "persons": "Stone, John", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": null, "title": "Cosmogenic nuclide data for bedrock samples from the Ford Ranges, Marie Byrd Land, West Antarctica", "uid": "600002", "west": null}, {"awards": "0086997 Truffer, Martin", "bounds_geometry": ["POLYGON((-140.7 -83.2,-140.12 -83.2,-139.54 -83.2,-138.96 -83.2,-138.38 -83.2,-137.8 -83.2,-137.22 -83.2,-136.64 -83.2,-136.06 -83.2,-135.48 -83.2,-134.9 -83.2,-134.9 -83.27,-134.9 -83.34,-134.9 -83.41,-134.9 -83.48,-134.9 -83.55,-134.9 -83.62,-134.9 -83.69,-134.9 -83.76,-134.9 -83.83,-134.9 -83.9,-135.48 -83.9,-136.06 -83.9,-136.64 -83.9,-137.22 -83.9,-137.8 -83.9,-138.38 -83.9,-138.96 -83.9,-139.54 -83.9,-140.12 -83.9,-140.7 -83.9,-140.7 -83.83,-140.7 -83.76,-140.7 -83.69,-140.7 -83.62,-140.7 -83.55,-140.7 -83.48,-140.7 -83.41,-140.7 -83.34,-140.7 -83.27,-140.7 -83.2))"], "date_created": "Thu, 17 Mar 2005 00:00:00 GMT", "description": "This product, based on prior data collected under NSF-OPP grant 8716604 (Echelmeyer and Harrison) and NSF-OPP grant 9117911 (Harrison), includes ice velocity data between stations S17 and UpB on the Upper Whillans Ice Stream, Siple Coast, West Antarctica, from January 1994 to January 1995. Velocities were measured using a total station, a surveying instrument that combines a digital theodolite and an Electronic Distance Measuring (EDM) device to measure horizontal and vertical angles, slope, and horizontal and vertical distances. Data are in ASCII and Excel formats, and are available via FTP.", "east": -134.9, "geometry": ["POINT(-137.8 -83.55)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Siple Coast", "locations": "Antarctica; Siple Coast", "north": -83.2, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Truffer, Martin; Echelmeyer, Keith A.", "project_titles": "Margin Migration Rates and Margin Dynamics of the Siple Coast Ice Streams", "projects": [{"proj_uid": "p0000144", "repository": "USAP-DC", "title": "Margin Migration Rates and Margin Dynamics of the Siple Coast Ice Streams"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -83.9, "title": "Margin Migration Rates and Dynamics: Siple Coast Ice Streams", "uid": "609263", "west": -140.7}, {"awards": "0135989 Wilen, Larry", "bounds_geometry": ["POINT(148 81)"], "date_created": "Wed, 02 Mar 2005 00:00:00 GMT", "description": "This data set contains measurements of the orientation and deformation of the crystal c-axes (fabric) of ice core samples collected from the Siple Dome Ice Core A, Antarctica (81\u00b0S, 148\u00b0W) between 22.764 m and 992.385 m in depth. The instrument used for the measurements consists of a fiber-optic white light source, one fixed black-and-white video camera, and four rotation stages. The data are in ASCII tab-delimited text format and are available via FTP.", "east": 148.0, "geometry": ["POINT(148 81)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Siple Dome; Siple Dome Ice Core", "locations": "Siple Dome; Antarctica", "north": 81.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Wilen, Larry", "project_titles": "Collaborative Research: Fabric and Texture Characteristics of Micro-Physical Processes in Ice", "projects": [{"proj_uid": "p0000134", "repository": "USAP-DC", "title": "Collaborative Research: Fabric and Texture Characteristics of Micro-Physical Processes in Ice"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core", "south": 81.0, "title": "Ice Fabric Characteristics: Siple Dome, A Core", "uid": "609255", "west": 148.0}, {"awards": null, "bounds_geometry": null, "date_created": "Tue, 14 Dec 2004 00:00:00 GMT", "description": "This data set consists of AVHRR retrievals of surface and cloud properties as well as radiative fluxes for the period 1982 - 1999 over the Arctic and Antarctic at a 25 km resolution. The images times are 1400 and 0400 (Arctic) or 0200 (Antarctic) local solar times. Resulsts are calculated on a twice-daily basis, but only monthly mean images and area-averaged values are currently online.\n\nThe standard AVHRR Polar Pathfinder (APP) product includes gridded radiances, viewing and illumination geometry, clear sky surface temperature and albedo, and three cloud masks at a 5 km resolution. We have extended the standard APP product to include all-sky surface temperature, all-sky surface albedo, cloud properties (particle phase, effective radius, optical depth, temperature and pressure), and radiative fluxes as well as cloud radiative effect (\u201cforcing\u201d). We refer to this dataset as APP-x", "east": null, "geometry": null, "keywords": null, "locations": null, "north": null, "nsf_funding_programs": null, "persons": "Key, Jeffrey R.", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": null, "title": "Extended Advanced Very High Resolution Radiometer Polar Pathfinder Satellite Product", "uid": "600021", "west": null}, {"awards": "XXXXXXX Palais, Julie", "bounds_geometry": ["POINT(159.183333 -72.827778)"], "date_created": "Fri, 27 Aug 2004 00:00:00 GMT", "description": "This data set consists of deuterioum isotope data obtained from Talos Dome ice core. Talos Dome is located on the edge of the East Antarctic plateau \nadjacent to the Victoria Land mountain. The Talos Dome (TD) firn core is 89 m and was drilled during a traverse by an Italian team in 1996.", "east": 159.183333, "geometry": ["POINT(159.183333 -72.827778)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Isotope; Paleoclimate; Talos Dome", "locations": "Antarctica; Talos Dome", "north": -72.827778, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Jouzel, Jean; Stenni, Barbara", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -72.827778, "title": "Talos Dome Ice Core Deuterium Isotope Data", "uid": "609252", "west": 159.183333}, {"awards": "0126057 Brook, Edward J.", "bounds_geometry": null, "date_created": "Fri, 27 Aug 2004 00:00:00 GMT", "description": "This data set compares global atmospheric concentration of methane from ice cores taken on the ice sheets of Antarctica and Greenland. The data come from multiple ice cores on each continent, including Greenland Ice Core Project (GRIP) and Greenland Ice Sheet Project (GISP) ice cores and the Byrd and Vostok cores from Antarctica. (The orignal dataset is located at ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/greenland/summit/grip/synchronization/)", "east": null, "geometry": null, "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Paleoclimate; Vostok Ice Core", "locations": "Antarctica", "north": null, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Blunier, Thomas; Stauffer, Bernhard; Chappellaz, Jerome; Brook, Edward J.", "project_titles": "High Resolution Records of Atmospheric Methane in Ice Cores and Implications for Late Quaternary Climate Change", "projects": [{"proj_uid": "p0000034", "repository": "USAP-DC", "title": "High Resolution Records of Atmospheric Methane in Ice Cores and Implications for Late Quaternary Climate Change"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Antarctic and Greenland Climate Change Comparison", "uid": "609253", "west": null}, {"awards": "9725918 Brook, Edward J.; 9714687 Brook, Edward J.", "bounds_geometry": ["POINT(-119.516667 -80.016667)"], "date_created": "Thu, 26 Aug 2004 00:00:00 GMT", "description": "This data set consists of microparticle and chemistry data from Byrd Ice Core, the first ice core to reach bedrock in Antarctica. The core was drilled with a cable-suspended electromechanical rotary drill at Byrd Station, Antarctica. The vertical thickness of the ice was 2164 meters and more than 99 percent of the core was recovered. Cores were sought for investigations of the physical properties of the ice sheet, the nature of the ice-rock contact, and the composition of the underlying bedrock.", "east": -119.516667, "geometry": ["POINT(-119.516667 -80.016667)"], "keywords": "Antarctica; Byrd; Byrd Ice Core; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Paleoclimate", "locations": "Antarctica", "north": -80.016667, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Blunier, Thomas; Fluckiger, Jacqueline; Thompson, Lonnie G.; Brook, Edward J.", "project_titles": "Collaborative Research: Studies of Trapped Gases in Firn and Ice from Antarctic Deep Ice Cores", "projects": [{"proj_uid": "p0000168", "repository": "USAP-DC", "title": "Collaborative Research: Studies of Trapped Gases in Firn and Ice from Antarctic Deep Ice Cores"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Byrd Ice Core", "south": -80.016667, "title": "Byrd Ice Core Microparticle and Chemistry Data", "uid": "609247", "west": -119.516667}, {"awards": "XXXXXXX Palais, Julie", "bounds_geometry": ["POINT(123.332196 -75.09978)"], "date_created": "Thu, 26 Aug 2004 00:00:00 GMT", "description": "This data set includes isotope and depth age data, and CO2 and CH4 data from the Dome C Antarctica ice core. This core is a 906 meter core that spans approximately 32,000 years. It was a thermally drilled core and was retrieved during the 1977-78 Antarctic field season as part of the International Antarctic Glaciological project.", "east": 123.332196, "geometry": ["POINT(123.332196 -75.09978)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Depth-Age-Model; Dome C Ice Core; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Paleoclimate", "locations": "Antarctica", "north": -75.09978, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Lal, Devendra; Lorius, Claude", "project_titles": "Nuclear Studies of Accumulating and Ablation Ice Using Cosmogenic 14c", "projects": [{"proj_uid": "p0000152", "repository": "USAP-DC", "title": "Nuclear Studies of Accumulating and Ablation Ice Using Cosmogenic 14c"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Dome C Ice Core", "south": -75.09978, "title": "Dome C Ice Core Chemistry and Depth and Age Scale Data", "uid": "609243", "west": 123.332196}, {"awards": "XXXXXXX Palais, Julie", "bounds_geometry": ["POINT(112.833333 -66.65)"], "date_created": "Thu, 26 Aug 2004 00:00:00 GMT", "description": "This data set includes CO2 and CH4 records derived from three ice cores obtained at Law Dome, East Antarctica, from 1987 to 1993. Law Dome is a medium size, approximately circular, (200 km dia., 1390 m high) ice sheet situated at the edge of the main East Antarctic ice sheet. The data in this set include cores drilled between 1987 and 1993 to a depth of 1199.6.", "east": 112.833333, "geometry": ["POINT(112.833333 -66.65)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Law Dome; Paleoclimate", "locations": "Antarctica; Law Dome", "north": -66.65, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Barnola, J. M.; Etheridge, David; Morgan, Vin", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -66.65, "title": "Law Dome Ice Cores Chemistry Data", "uid": "609245", "west": 112.833333}, {"awards": "9316564 Mayewski, Paul", "bounds_geometry": ["POINT(148.7725 -81.6425)"], "date_created": "Thu, 26 Aug 2004 00:00:00 GMT", "description": "This data set includes chemistry and ion data collected from a 150 m core recovered from Siple Dome, West Antarctica. The core was drilled during the 1994/1995 field season. Dating of the core was accomplished using annual signals preserved in several chemical species, beta activity profiles, and volcanic horizons. The resulting depth/age scale indicates an age of 1890 A.D. at 24 m, and 850 A.D. at 150 m depth.", "east": 148.7725, "geometry": ["POINT(148.7725 -81.6425)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Paleoclimate; Siple Dome; Siple Dome Ice Core", "locations": "Antarctica; Siple Dome", "north": -81.6425, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Blunier, Thomas; Severinghaus, Jeffrey P.; Brook, Edward J.; Kreutz, Karl; Mayewski, Paul A.; Dunbar, Nelia", "project_titles": "Ross Ice Drainage System (RIDS) Late Holocene Climate Variability", "projects": [{"proj_uid": "p0000145", "repository": "NCEI", "title": "Ross Ice Drainage System (RIDS) Late Holocene Climate Variability"}], "repo": "NCEI", "repositories": "NCEI", "science_programs": "Siple Dome Ice Core", "south": -81.6425, "title": "Siple Dome Ice Core Chemistry and Ion Data", "uid": "609251", "west": 148.7725}, {"awards": "XXXXXXX Palais, Julie", "bounds_geometry": ["POINT(0.09472 -74.9961)"], "date_created": "Thu, 26 Aug 2004 00:00:00 GMT", "description": "This data set consists of chemistry data obtained from a shallow core in Dronning Maud Land, Antarctica. Major ion concentration values (Na, Mg, Ca, Cl, NO3, SO4, MSA) were analyzed from the 20 meter ice core, which was drilled during the austral summer 1991-1992.", "east": 0.09472, "geometry": ["POINT(0.09472 -74.9961)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Dronning Maud Land; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Paleoclimate", "locations": "Dronning Maud Land; Antarctica", "north": -74.9961, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Mayewski, Paul A.; Whitlow, Sallie; Isaksson, Elisabeth", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -74.9961, "title": "Dronning Maud Land Ice Core Chemistry Data", "uid": "609250", "west": 0.09472}, {"awards": "8411018 Frisic, David; 8613786 Mayewski, Paul", "bounds_geometry": ["POINT(162.5 -77.61667)"], "date_created": "Thu, 26 Aug 2004 00:00:00 GMT", "description": "This data set includes beta profiles, chemistry, stratigraphy data, and density and temperature profiles collected from snow pits and two ice cores on the Newall Glacier. Snow pit and ice core data were collected between 1987 and 1989. Ice Core A was 175 meters long and core B was 150 meters long.", "east": 162.5, "geometry": ["POINT(162.5 -77.61667)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Newall Glacier; Paleoclimate; Physical Properties; Snow/ice; Snow/Ice; Statigraphy", "locations": "Newall Glacier; Antarctica", "north": -77.61667, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Welch, Kathy A.; Mayewski, Paul A.", "project_titles": "Characterization of Climatic Events for the Last 2 x 103y through the Retrieval of Ice Cores from the Transantarctic Mountains, Antarctica", "projects": [{"proj_uid": "p0000169", "repository": "USAP-DC", "title": "Characterization of Climatic Events for the Last 2 x 103y through the Retrieval of Ice Cores from the Transantarctic Mountains, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.61667, "title": "Newall Glacier Ice Core and Snow Pit Beta Profiles, Chemistry, and Stratigraphy", "uid": "609249", "west": 162.5}, {"awards": "XXXXXXX Palais, Julie", "bounds_geometry": ["POINT(106.8 -78.4666667)"], "date_created": "Thu, 26 Aug 2004 00:00:00 GMT", "description": "This data set contains ice core chemistry, timescale, isotope, and temperature data analyzed by several investigators. In January 1998, the collaborative ice-drilling project between Russia, \nthe United States, and France at the Russian Vostok station in East Antarctica \nyielded the deepest ice core ever recovered, reaching a depth of 3,623 m. Preliminary data indicate the Vostok ice-core record \nextends through four climate cycles, with ice slightly older than 400 kyr.", "east": 106.8, "geometry": ["POINT(106.8 -78.4666667)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Isotope; Lake Vostok; Paleoclimate; Physical Properties; Temperature; Vostok Ice Core", "locations": "Lake Vostok; Antarctica", "north": -78.4666667, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Lal, Devendra; Barnola, J. M.; Petit, Jean Robert; Jouzel, Jean; Sowers, Todd A.; Brook, Edward J.; Bender, Michael; Fishcer, Hubertus; Blunier, Thomas; Ruddiman, William; Raymo, Maureen; Lorius, Claude; Chappellaz, Jerome", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -78.4666667, "title": "Vostok Ice Core Chemistry, Timescale, Isotope, and Temperature Data", "uid": "609242", "west": 106.8}, {"awards": "9615292 Wahlen, Martin", "bounds_geometry": ["POINT(158 -77.6666667)"], "date_created": "Thu, 26 Aug 2004 00:00:00 GMT", "description": "This data set includes chemistry, ion, and istotope data from Taylor Dome, part of the East Antarctic ice sheet. Deep drilling at Taylor Dome successfully reached bedrock at a depth of 554 meters during the 1993-1994 austral summer. The Taylor Dome ice core is only the second core (after Vostok) to provide a stratigraphically undisturbed record through the entire last glacial cycle (the last 130,000 years or more).", "east": 158.0, "geometry": ["POINT(158 -77.6666667)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Isotope; Paleoclimate; Taylor Dome; Taylor Dome Ice Core", "locations": "Antarctica; Taylor Dome", "north": -77.6666667, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Smith, Jesse; Sowers, Todd A.; Brook, Edward J.; Mayewski, Paul A.; Steig, Eric J.; Indermuhle, A.", "project_titles": "Carbon Dioxide and Carbon Isotopes in the Taylor Dome and Vostok Ice Cores", "projects": [{"proj_uid": "p0000153", "repository": "USAP-DC", "title": "Carbon Dioxide and Carbon Isotopes in the Taylor Dome and Vostok Ice Cores"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Taylor Dome Ice Core", "south": -77.6666667, "title": "Taylor Dome Ice Core Chemistry, Ion, and Isotope Data", "uid": "609246", "west": 158.0}, {"awards": "8411018 Frisic, David; 8613786 Mayewski, Paul", "bounds_geometry": ["POINT(166.16667 -85.25)"], "date_created": "Thu, 26 Aug 2004 00:00:00 GMT", "description": "This data set includes beta profiles, chemistry, and density data obtained from Dominion Range ice cores. The Dominion Range is on the East Antarctic Ice Sheet. The chemistry data consists of the composition of oxygen-isotopes and trapped gasses. Other information includes ice thickness, mean annual net accumulation, and crystal size. The core samples were collected in the austral summer of 1984-85. \n", "east": 166.16667, "geometry": ["POINT(166.16667 -85.25)"], "keywords": "Antarctica; Beta Profiles; Chemistry:ice; Chemistry:Ice; Density; Dominion Range; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Paleoclimate; Physical Properties", "locations": "Antarctica; Dominion Range", "north": -85.25, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Sowers, Todd A.; Saltzman, Eric; Watson, M. Scott; Grootes, Pieter; Mayewski, Paul A.; Meese, Deb; Gow, Tony", "project_titles": "Characterization of Climatic Events for the Last 2 x 103y through the Retrieval of Ice Cores from the Transantarctic Mountains, Antarctica", "projects": [{"proj_uid": "p0000169", "repository": "USAP-DC", "title": "Characterization of Climatic Events for the Last 2 x 103y through the Retrieval of Ice Cores from the Transantarctic Mountains, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -85.25, "title": "Dominion Range Ice Core Beta Profiles, Chemistry, and Density Data", "uid": "609248", "west": 166.16667}, {"awards": "XXXXXXX Palais, Julie", "bounds_geometry": ["POINT(123.332196 -75.09978)"], "date_created": "Thu, 26 Aug 2004 00:00:00 GMT", "description": "This data set is a collection of analyses done on the the European Project for Ice Coring in Antarctica (EPICA)Dome C ice cores. The data include deuterium and other chemistry, insoluble dust, ice grain radius, dielectric profiling, electrical conductivity, and timescales.\n\nEPICA has completed one core in the Dome Concordia region (Core EDC96, started in 1996, 788 m length). Drilling is ongoing on a second core EDC99 (started in 1999, reached a depth of 3200 m during the 2002/2003 field season. The ice at this depth is estimated to be about 700,000 years old.)", "east": 123.332196, "geometry": ["POINT(123.332196 -75.09978)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Dome C Ice Core; Epica; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Paleoclimate; Physical Properties", "locations": "Antarctica", "north": -75.09978, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Wolff, Eric W.; Monnin, Eric; Fluckiger, Jacqueline", "project_titles": null, "projects": null, "repositories": null, "science_programs": "Dome C Ice Core", "south": -75.09978, "title": "European Project for Ice Coring in Antarctica (EPICA) Dome C Ice Core Data", "uid": "609244", "west": 123.332196}, {"awards": "9319369 Blankenship, Donald; 9120464 Blankenship, Donald; 9319379 Blankenship, Donald; 9911617 Blankenship, Donald", "bounds_geometry": ["POLYGON((-90 -68.73,-72 -68.73,-54 -68.73,-36 -68.73,-18 -68.73,0 -68.73,18 -68.73,36 -68.73,54 -68.73,72 -68.73,90 -68.73,90 -69.357,90 -69.984,90 -70.611,90 -71.238,90 -71.865,90 -72.492,90 -73.119,90 -73.746,90 -74.373,90 -75,72 -75,54 -75,36 -75,18 -75,0 -75,-18 -75,-36 -75,-54 -75,-72 -75,-90 -75,-90 -74.373,-90 -73.746,-90 -73.119,-90 -72.492,-90 -71.865,-90 -71.238,-90 -70.611,-90 -69.984,-90 -69.357,-90 -68.73))"], "date_created": "Tue, 13 Jul 2004 00:00:00 GMT", "description": "The data that the Support Office for Aerogeophysical Research (SOAR) provides include various aerogeophysical measurements taken in the West Antarctic Ice Shelf (WAIS) from 1994 to 2001. \n\nThe instruments used in experiments include ice-penetrating radar, laser altimetry and magnetics, and an integrated aerogeophysical platform that includes airborne gravity with carrier-phase GPS to support kinematic differential positioning.\n\nSOAR is a part of the University of Texas Institute for Geophysics (UTIG) and provides several types of data associated with various campaigns over the years. This material is based on work supported by the National Science Foundation under Grants: OPP-9120464, 9319369, 9319379, and 9911617.", "east": 90.0, "geometry": ["POINT(-180 -71.865)"], "keywords": "Airborne Radar; Antarctica; Geology/Geophysics - Other; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Navigation; Potential Field; SOAR; Solid Earth", "locations": "Antarctica", "north": -68.73, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Blankenship, Donald D.; Morse, David L.; Holt, John W.; Dalziel, Ian W.", "project_titles": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR)", "projects": [{"proj_uid": "p0000125", "repository": "USAP-DC", "title": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -75.0, "title": "Antarctic Aerogeophysics Data", "uid": "609240", "west": -90.0}, {"awards": "XXXXXXX Palais, Julie", "bounds_geometry": ["POINT(-180 -90)"], "date_created": "Thu, 24 Jun 2004 00:00:00 GMT", "description": "Information from 6-meter snow pits dug close to the South Pole in\naustral summer 1988-1989 by the Glacier Research Group of the\nUniversity of New Hampshire (location - 38 km on grid 90 from South\nPole station - eastern margin of clean air sector) are available.\n\nMajor ion chemistry (Na, K, Mg, Ca, Cl, NO3, SO4), oxygen isotopes\n(I8O), H2O2, and beta from a 6-meter snow pit covering the period 1955\nto 1989 are included. Major ion chemistry for a series of surface snow\nsamples were also collected on the traverse to the pit.", "east": -180.0, "geometry": ["POINT(-180 -90)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciology; Ice Core Records; Paleoclimate; Snow/ice; Snow/Ice; South Pole", "locations": "South Pole; Antarctica", "north": -90.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Mayewski, Paul A.; Whitlow, Sallie", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -90.0, "title": "South Pole Snow Pit, 1988 and 1989", "uid": "609086", "west": -180.0}, {"awards": "0087151 Cole-Dai, Jihong", "bounds_geometry": ["POINT(0 -90)"], "date_created": "Fri, 09 Apr 2004 00:00:00 GMT", "description": "This data set contains concentrations of soluble chemical species (ions) within a 120 m ice core retrieved at the South Pole station in 2001. The ice core was dated with annual resolution using annual layer counting. Investigators measured chemical species, ions, and volcanic deposits found in the cores. The analysis was conducted at South Dakota State University between 2001 and 2003. Data are available in Microsoft Excel or ASCII text format via FTP from NSIDC.", "east": 0.0, "geometry": ["POINT(0 -90)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Solid Earth; South Pole", "locations": "Antarctica; South Pole", "north": -90.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Cole-Dai, Jihong", "project_titles": "A Sulfate-based Volcanic Record from South Pole Ice Cores", "projects": [{"proj_uid": "p0000167", "repository": "USAP-DC", "title": "A Sulfate-based Volcanic Record from South Pole Ice Cores"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Sulfate-Based Volcanic Record from South Pole Ice Core", "uid": "609215", "west": 0.0}, {"awards": "XXXXXXX Palais, Julie", "bounds_geometry": ["POLYGON((-180 -50,-144 -50,-108 -50,-72 -50,-36 -50,0 -50,36 -50,72 -50,108 -50,144 -50,180 -50,180 -54,180 -58,180 -62,180 -66,180 -70,180 -74,180 -78,180 -82,180 -86,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -86,-180 -82,-180 -78,-180 -74,-180 -70,-180 -66,-180 -62,-180 -58,-180 -54,-180 -50))"], "date_created": "Tue, 23 Mar 2004 00:00:00 GMT", "description": "This compilation of recent ice velocity data of the Antarctic ice sheet is intended for use by the polar scientific community. The data are presented in tabular form (ASCII), containing latitude, longitude, speed, bearing, and error ranges. A metadata header describes the source of the data, the time of measurement, and gives details on measurement accuracy and precision. The tables are available for ftp transfer.\n\nWeb pages developed specifically for this data set provide detailed information for viewing and selecting the velocity data. These pages contain large satellite image maps (available as jpeg files). The data sets used to create these images were contributed by several investigators, generally from already published work. Both in situ and image-based methods are used.\n\nReferences for the data sets are included with the data tables. If you have well-characterized Antarctic ice velocity data you would like to contribute to this site, please contact teds@icehouse.colorado.edu. If you have any questions concerning the relevance of these data to your work please contact NSIDC User Services.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Geology/Geophysics - Other; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Velocity; Sample/collection Description; Sample/Collection Description", "locations": "Antarctica; Antarctica", "north": -50.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Bindschadler, Robert; Raymond, Charles", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -90.0, "title": "Antarctic Ice Velocity Data", "uid": "609070", "west": -180.0}, {"awards": "8919147 Elliot, David", "bounds_geometry": ["POLYGON((-134 -80,-131 -80,-128 -80,-125 -80,-122 -80,-119 -80,-116 -80,-113 -80,-110 -80,-107 -80,-104 -80,-104 -80.4,-104 -80.8,-104 -81.2,-104 -81.6,-104 -82,-104 -82.4,-104 -82.8,-104 -83.2,-104 -83.6,-104 -84,-107 -84,-110 -84,-113 -84,-116 -84,-119 -84,-122 -84,-125 -84,-128 -84,-131 -84,-134 -84,-134 -83.6,-134 -83.2,-134 -82.8,-134 -82.4,-134 -82,-134 -81.6,-134 -81.2,-134 -80.8,-134 -80.4,-134 -80))"], "date_created": "Wed, 17 Mar 2004 00:00:00 GMT", "description": "Ice surface elevation and ice thickness data are available for a\nportion of the West Antarctic Ice Sheet. The investigators utilized a\nlaser altimeter and ice-penetrating radar mounted to a Twin Otter\naircraft to survey the ice sheet. Ice surface elevations and ice\nthickness data, derived from laser altimetry and radar sounding\nresults, are available in ASCII format via ftp.\n\nThese data are a result of the Corridor Aerogeophysics of the\nSoutheastern Ross Transect Zone (CASERTZ) experiments of the 1990s.\nThe CASERTZ geophysical surveys were aimed at understanding geological\ncontrols on ice streams of the West Antarctic Ice Sheet, ultimately to\nhelp assess the potential for ice sheet collapse. Blankenship et\nal. (2001) used ice surface elevations and ice thicknesses (reported\nhere) to calculate driving stresses across the ice sheet and thus to identify regions of rapid basal movement by ice streams.", "east": -104.0, "geometry": ["POINT(-119 -82)"], "keywords": "Antarctica; Elevation; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ross Embayment; West Antarctica", "locations": "Ross Embayment; Antarctica; West Antarctica", "north": -80.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Blankenship, Donald D.; Finn, C. A.; Morse, David L.; Peters, M. E.; Kempf, Scott D.; Hodge, S. M.; Behrendt, J. C.; Brozena, J. M.; Studinger, Michael S.; Bell, Robin", "project_titles": "Corridor Aerogeophysics of the Southeastern Ross Transect Zone (CASERTZ), Antarctica", "projects": [{"proj_uid": "p0000056", "repository": "USAP-DC", "title": "Corridor Aerogeophysics of the Southeastern Ross Transect Zone (CASERTZ), Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -84.0, "title": "Ice Thickness and Surface Elevation, Southeastern Ross Embayment, West Antarctica", "uid": "609099", "west": -134.0}, {"awards": "9615333 Saltzman, Eric", "bounds_geometry": ["POINT(-148.8 -81.7)"], "date_created": "Tue, 09 Mar 2004 00:00:00 GMT", "description": "This data set is a continuous, high-resolution record of biogenic sulfur (methanesulfonate, known as MSA and CH3SO3-) in the 1000 m deep Siple Dome A (SDMA) core, covering 100,000 to 20 years BP. The analysis was done on between August 2002 and November 2003 at the University of California, Irvine. Investigators used a mass spectrometer to measure methanesulfonate. Measurements are given as MSA concentration at various depths. Estimated age of the ice at each depth is also given.\n\nThis project was a part of the West Antarctic Ice Sheet Cores (WAISCORES) project for deep ice coring in West Antarctica. WAISCORES is supported by the Office of Polar Programs, National Science Foundation (NSF).", "east": -148.8, "geometry": ["POINT(-148.8 -81.7)"], "keywords": "Antarctica; Biota; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Paleoclimate; Siple Dome; Siple Dome Ice Core; WAISCORES", "locations": "Siple Dome; Antarctica", "north": -81.7, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Saltzman, Eric; Dioumaeva, Irina; Finley, Brandon", "project_titles": "Biogenic Sulfur in the Siple Dome Ice Core", "projects": [{"proj_uid": "p0000251", "repository": "USAP-DC", "title": "Biogenic Sulfur in the Siple Dome Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core", "south": -81.7, "title": "Biogenic Sulfur in the Siple Dome Ice Core", "uid": "609201", "west": -148.8}, {"awards": "9980691 Wahlen, Martin", "bounds_geometry": ["POINT(-148.82 -81.66)"], "date_created": "Thu, 11 Dec 2003 00:00:00 GMT", "description": "These data are CO2 concentrations of the air occulded in Siple Dome ice core, Antarctica. The study was conducted between January 2001 and March 2003 on a deep ice core from Siple Dome Core A, located at 81.66 S, 148.82 W.", "east": -148.82, "geometry": ["POINT(-148.82 -81.66)"], "keywords": "Antarctica; Chemistry:fluid; Chemistry:Fluid; CO2; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Paleoclimate; Siple Dome; Siple Dome Ice Core", "locations": "Siple Dome; Antarctica", "north": -81.66, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Ahn, Jinho; Wahlen, Martin; Deck, Bruce", "project_titles": "CO2 and Delta 13CO2 in Antarctic Ice Cores", "projects": [{"proj_uid": "p0000166", "repository": "USAP-DC", "title": "CO2 and Delta 13CO2 in Antarctic Ice Cores"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core", "south": -81.66, "title": "Atmospheric CO2 Trapped in the Ice Core from Siple Dome, Antarctica", "uid": "609202", "west": -148.82}, {"awards": "0338151 Raymond, Charles", "bounds_geometry": ["POLYGON((-157 -71,-154.9 -71,-152.8 -71,-150.7 -71,-148.6 -71,-146.5 -71,-144.4 -71,-142.3 -71,-140.2 -71,-138.1 -71,-136 -71,-136 -71.9,-136 -72.8,-136 -73.7,-136 -74.6,-136 -75.5,-136 -76.4,-136 -77.3,-136 -78.2,-136 -79.1,-136 -80,-138.1 -80,-140.2 -80,-142.3 -80,-144.4 -80,-146.5 -80,-148.6 -80,-150.7 -80,-152.8 -80,-154.9 -80,-157 -80,-157 -79.1,-157 -78.2,-157 -77.3,-157 -76.4,-157 -75.5,-157 -74.6,-157 -73.7,-157 -72.8,-157 -71.9,-157 -71))"], "date_created": "Wed, 10 Dec 2003 00:00:00 GMT", "description": "This data set provides surface elevation and ice thickness data for a portion of the Marie Byrd Land sector of West Antarctica, including the Ford Ranges, the Sulzberger Ice Shelf, much of the Edward VII Peninsula, and the Shirase Coast region of the eastern Ross Ice Shelf. The investigators used radar sounding and laser altimetry from a Twin Otter aircraft flying at varying altitudes, at least 300 m above the surface, at an air speed of about 130 knots. Surveys were accomplished with 64 flights in December 1998 and January 1999. This research was funded by the National Science Foundation (NSF) contract NSF OPP 9615281.", "east": -136.0, "geometry": ["POINT(-146.5 -75.5)"], "keywords": "Airborne Radar; Airplane; Antarctica; Elevation; Glaciers/ice Sheet; Glaciers/Ice Sheet; Marie Byrd Land", "locations": "Antarctica; Marie Byrd Land", "north": -71.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Luyendyk, Bruce P.; Wilson, Douglas S.", "project_titles": "Glaciological Characteristics of the Ross/Amundsen Sea Ice-flow Divide Deduced by a New Analysis of Ice-penetrating Radar Data", "projects": [{"proj_uid": "p0000017", "repository": "USAP-DC", "title": "Glaciological Characteristics of the Ross/Amundsen Sea Ice-flow Divide Deduced by a New Analysis of Ice-penetrating Radar Data"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.0, "title": "Surface Elevation and Ice Thickness, Western Marie Byrd Land, Antarctica", "uid": "609119", "west": -157.0}, {"awards": null, "bounds_geometry": null, "date_created": "Thu, 06 Nov 2003 00:00:00 GMT", "description": "This presentation uses a series of paleogeographic and plate-tectonic reconstructions to show the broad patterns of Phanerozoic Earth history. Organization is by region and in geologic order from oldest to youngest for each region. The Time Slice link shows all maps and globes of all regions by geologic time (the Periods). \nOptions available from the menu are: \n- Paleogeographic globes, http://jan.ucc.nau.edu/~rcb7/paleogeographic.html; \n- Tectonics, Sedimentation, Paleogeography of North Atlantic Region, http://jan.ucc.nau.edu/~rcb7/nat.html; \n- Tectonics and Paleogeography of Mediterranean Region, http://jan.ucc.nau.edu/~rcb7/paleogeographic_alps.html; - Tectonics and Paleogeography of Central and Southern Asia, http://jan.ucc.nau.edu/~rcb7/paleogeographic_asia.html; and \n- Time Slice, http://jan.ucc.nau.edu/~rcb7/global_history.html, all maps and globes of all regions by geologic time, and a brief narrative for each time interval.", "east": null, "geometry": null, "keywords": null, "locations": null, "north": null, "nsf_funding_programs": null, "persons": "Blakey, Ronald C.", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": null, "title": "Regional Paleogeographic Views of Earth History", "uid": "600017", "west": null}, {"awards": "XXXXXXX Palais, Julie", "bounds_geometry": ["POLYGON((-120 -80,-118.5 -80,-117 -80,-115.5 -80,-114 -80,-112.5 -80,-111 -80,-109.5 -80,-108 -80,-106.5 -80,-105 -80,-105 -80.5,-105 -81,-105 -81.5,-105 -82,-105 -82.5,-105 -83,-105 -83.5,-105 -84,-105 -84.5,-105 -85,-106.5 -85,-108 -85,-109.5 -85,-111 -85,-112.5 -85,-114 -85,-115.5 -85,-117 -85,-118.5 -85,-120 -85,-120 -84.5,-120 -84,-120 -83.5,-120 -83,-120 -82.5,-120 -82,-120 -81.5,-120 -81,-120 -80.5,-120 -80))"], "date_created": "Thu, 16 Oct 2003 00:00:00 GMT", "description": "Glaciochemical and accumulation rate records developed from four ice cores in central West Antarctica are used to reconstruct former atmospheric circulation patterns in this region for the last 40 years with extended records (150-250 years) at two sites. The sites lie on a 200 km traverse from 82 degrees 22 minutes south, 119 degrees 17 minutes west to 81 degrees 22 minutes south, 107 degrees 17 minutes west, gaining elevation from 950 to 1930 m. The glaciochemical records represent the major ionic species present in Antarctic snow: sodium, potassium, magnesium, calcium, chloride, nitrate, and sulfate.", "east": -105.0, "geometry": ["POINT(-112.5 -82.5)"], "keywords": "Accumulation Rate; Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Paleoclimate; Snow/ice; Snow/Ice; West Antarctica", "locations": "West Antarctica; Antarctica", "north": -80.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Reusch, David", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -85.0, "title": "Central West Antarctic Glaciochemistry from Ice Cores", "uid": "609093", "west": -120.0}, {"awards": "9420648 Waddington, Edwin", "bounds_geometry": ["POINT(-149 -81)"], "date_created": "Tue, 09 Sep 2003 00:00:00 GMT", "description": "This data set is part of the WAISCORES project, an NSF-funded project to understand the influence of the West Antarctic ice sheet on climate and sea level change. WAISCORES researchers acquired and analyzed ice cores from the Siple Dome, in the Siple Coast region, West Antarctica.\n\nNereson\u0027s \u0027Age Versus Depth\u0027 plot shows the results of the calculations published in her paper on predicted age-depth scales (Nereson, N.A., E.D. Waddington, C.F. Raymond, and H.P. Jacobson. 1996. Predicted Age-Depth Scales for Siple Dome and Inland WAIS Ice Cores in West Antarctica.Geophys. Res. Let., 23(22): 3163-3166.).", "east": -149.0, "geometry": ["POINT(-149 -81)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Siple Dome; Siple Dome Ice Core; WAISCORES", "locations": "Antarctica; Siple Dome", "north": -81.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Nereson, Nadine A.", "project_titles": "Ice Modelling Study of Siple Dome: WAIS Ice Dynamics, WAISCORES Paleoclimate and Ice Stream/Ice Dome Interactions", "projects": [{"proj_uid": "p0000058", "repository": "USAP-DC", "title": "Ice Modelling Study of Siple Dome: WAIS Ice Dynamics, WAISCORES Paleoclimate and Ice Stream/Ice Dome Interactions"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core", "south": -81.0, "title": "Siple Dome Ice Core Age-Depth Scales", "uid": "609130", "west": -149.0}, {"awards": "XXXXXXX Palais, Julie", "bounds_geometry": ["POINT(-149 -81)"], "date_created": "Mon, 18 Aug 2003 00:00:00 GMT", "description": "This data set is part of the WAISCORES project, an NSF-funded project to understand the influence of the West Antarctic ice sheet on climate and sea level change. WAISCORES researchers acquired and analyzed ice cores from the Siple Dome, in the Siple Coast region, West Antarctica.\n\nThis data set provides measurements of stable isotopes of water and deuterium excess for the Siple Dome ice cores. The shallow cores from Siple Dome were analyzed for isotopes with sub-annual temporal detail.", "east": -149.0, "geometry": ["POINT(-149 -81)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Isotope; Paleoclimate; Siple Dome; Siple Dome Ice Core; WAISCORES", "locations": "Antarctica; Siple Dome", "north": -81.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Steig, Eric J.; White, James", "project_titles": null, "projects": null, "repositories": null, "science_programs": "Siple Dome Ice Core", "south": -81.0, "title": "Siple Dome Highlights: Stable isotopes", "uid": "609134", "west": -149.0}, {"awards": "XXXXXXX Palais, Julie", "bounds_geometry": ["POINT(158 -77)"], "date_created": "Mon, 18 Aug 2003 00:00:00 GMT", "description": "The collection site is Taylor Dome, an ice-accumulation area on the East Antarctic ice sheet. The dome is a ridge about 20 x 80 km, which lies inland of the Transantarctic Mountains. Deep drilling by the Polar Ice Coring Office (PICO) at Taylor Dome reached bedrock at a depth of 554 meters during the 1993-1994 austral summer season.\n\n\u003cp\u003eThis data set includes mesurements of:\u003c/p\u003e\n\u003cul\u003e\n\u003cli\u003eberyllium-10 (betd.txt)\u003c/li\u003e\n\u003cli\u003eoxygen isotopes (hi18o_td.txt and lo18o_td.txt)\u003c/li\u003e\n\u003cli\u003edeuterium isotopes (deld_20cm.txt and deld_td.txt).\u003c/li\u003e\n\u003c/ul\u003e\n\u003cp\u003eThese data were produced at the University of Washington from samples obtained in the field and via the University of New Hampshire automatic melting system. For beryllium, deuterium, and 20-cm oxygen isotope data, the st9810 ice age (kyB1950) timescale is used. For 0.5- to 1-m oxygen isotope data, the st9507 is used.\u003c/p\u003e", "east": 158.0, "geometry": ["POINT(158 -77)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Isotope; Paleoclimate; Taylor Dome; Taylor Dome Ice Core", "locations": "Antarctica; Taylor Dome", "north": -77.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Steig, Eric J.; White, James", "project_titles": null, "projects": null, "repositories": null, "science_programs": "Taylor Dome Ice Core", "south": -77.0, "title": "Taylor Dome Ice Core Data", "uid": "609132", "west": 158.0}, {"awards": "0512971 Brook, Edward J.", "bounds_geometry": ["POINT(-149 -81)"], "date_created": "Mon, 18 Aug 2003 00:00:00 GMT", "description": "This data set is part of the WAISCORES project, an NSF-funded project to understand the influence of the West Antarctic ice sheet on climate and sea level change. WAISCORES researchers acquired and analyzed ice cores from the Siple Dome, in the Siple Coast region, West Antarctica.\n\nBrooks measured methane in approximately 196 samples between 55.6 and 738.5 m (0-20 ka) in the Siple Dome ice core, and then extended the Siple Dome methane record at medium resolution down to about 860m, corresponding to an age of about 45 ka. The team compared the results with data from the Greenland Ice Sheet Project 2 (GISP2) and the Greenland Ice Core Project (GRIP).", "east": -149.0, "geometry": ["POINT(-149 -81)"], "keywords": "Antarctica; Chemistry:fluid; Chemistry:Fluid; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Methane; Paleoclimate; Siple Dome; Siple Dome Ice Core; WAISCORES", "locations": "Antarctica; Siple Dome", "north": -81.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Brook, Edward J.", "project_titles": "High Resolution Records of Atmospheric Methane in Ice Cores and Implications for Late Quaternary Climate Change", "projects": [{"proj_uid": "p0000034", "repository": "USAP-DC", "title": "High Resolution Records of Atmospheric Methane in Ice Cores and Implications for Late Quaternary Climate Change"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core", "south": -81.0, "title": "Siple Dome Methane Record", "uid": "609124", "west": -149.0}, {"awards": "9527603 Stearns, Charles; 9419128 Stearns, Charles", "bounds_geometry": null, "date_created": "Mon, 18 Aug 2003 00:00:00 GMT", "description": "The Automatic Weather Station (AWS) Project, funded by the NSF Office of Polar Programs, involves collecting meteorological data from an array of automatic weather stations in Antarctica, Greenland, and Peru. Data collection in Antarctica began in 1980.\n\nData are available in tabular ASCII format via the University of Wisconsin\u0027s AWS Project Web site at http://uwamrc.ssec.wisc.edu/aws/. Both raw and \u0027corrected\u0027 versions of the data are available via ftp. Information about data processing and station characteristics is also provided.", "east": null, "geometry": null, "keywords": "Antarctica; Atmosphere; AWS; Weatherstation", "locations": "Antarctica", "north": null, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Stearns, Charles R.; Keller, Linda M.; Weidner, George A.; Lazzara, Matthew", "project_titles": "Continuation for the Antarctic Automatic Weather Station Climate Program 1995-1998", "projects": [{"proj_uid": "p0000151", "repository": "USAP-DC", "title": "Continuation for the Antarctic Automatic Weather Station Climate Program 1995-1998"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Three-Hourly Antarctic Automatic Weather Station Data, 1980-2000", "uid": "609111", "west": null}, {"awards": "9909469 Scambos, Ted", "bounds_geometry": ["POLYGON((-158 -82.2,-155.63 -82.2,-153.26 -82.2,-150.89 -82.2,-148.52 -82.2,-146.15 -82.2,-143.78 -82.2,-141.41 -82.2,-139.04 -82.2,-136.67 -82.2,-134.3 -82.2,-134.3 -82.33,-134.3 -82.46,-134.3 -82.59,-134.3 -82.72,-134.3 -82.85,-134.3 -82.98,-134.3 -83.11,-134.3 -83.24,-134.3 -83.37,-134.3 -83.5,-136.67 -83.5,-139.04 -83.5,-141.41 -83.5,-143.78 -83.5,-146.15 -83.5,-148.52 -83.5,-150.89 -83.5,-153.26 -83.5,-155.63 -83.5,-158 -83.5,-158 -83.37,-158 -83.24,-158 -83.11,-158 -82.98,-158 -82.85,-158 -82.72,-158 -82.59,-158 -82.46,-158 -82.33,-158 -82.2))"], "date_created": "Fri, 01 Aug 2003 00:00:00 GMT", "description": "This data set includes ice motion and topography measurements that were taken by measuring movement and altitude of poles set in the West Antarctic Ice Shelf. The data was acquired by Global Positioning System (GPS) measurements of poles. The position of the poles was measured twice; once in 2000, and again in 2002. Movement of the poles in that time show the ice motion velocity and direction.\n GPS pole positions are given in latitude and longitude, and elevations are given in meters above the WGS1984 ellipsoid. The data are presented as tables in ASCII text files. Three maps of the area are included with the data tables.\n\nThe National Science Foundation (NSF) funded this work under grant number OPP-9909469.", "east": -134.3, "geometry": ["POINT(-146.15 -82.85)"], "keywords": "Antarctica; Geodesy; Geology/Geophysics - Other; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Kamb Ice Stream", "locations": "Antarctica; Kamb Ice Stream", "north": -82.2, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Scambos, Ted; Catania, Ginny; Conway, Howard; Gades, Anthony; Raymond, Charles", "project_titles": "Collaborative Research: History and Evolution of the Siple Coast Ice Stream System as Recorded by Former Shear-Margin Scars", "projects": [{"proj_uid": "p0000165", "repository": "USAP-DC", "title": "Collaborative Research: History and Evolution of the Siple Coast Ice Stream System as Recorded by Former Shear-Margin Scars"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -83.5, "title": "Ice Motion and Topography Near Margin Areas of Kamb Ice Stream, Antarctica", "uid": "609141", "west": -158.0}, {"awards": "9977306 Ryan, Jeffrey", "bounds_geometry": null, "date_created": "Thu, 19 Jun 2003 00:00:00 GMT", "description": "A dataset of B, Be, and Li abundances, and Li and B isotopic ratios, for volcanic rocks from the McMurdo Volcanic Group, the Crary Mountains, and other intraplate volcanic centers, is available online at the University of South Florida. B, Be, and Li concentrations have been determined by DC Plasma spectrometry, following the methods of Ryan and Langmuir (1987;1988; 1993) and Ryan et al (1996). Li isotopic determinations follow the methods of Tomascak et al. (1999) and were conducted at the Department of Terrestrial Magnetism,.and B isotope determinations follow the methods of Tornarini and others (2002), and were conducted at the University of PIsa (Italy). Analytical precision for abundance and isotopic determinations are noted in the tabulation.\r\n\u003cbr/\u003e\r\n\u003cbr/\u003eThese data are the result of a completed NSF-OPP geochemical study of the McMurdo Volcanics, and an ongoing NSF-EAR study of the Li isotope systematics of intraplate volcanic rocks. The datasets will be augmented as current studies progress. These data are in part the product of mentored research efforts by USF undergraduate and graduate students from 2000-present.\r\n\u003cbr/\u003e\r\n\u003cbr/\u003eWebsite of Data resource: \"http://www.cas.usf.edu/~jryan/erebusdata.html\"", "east": null, "geometry": null, "keywords": "B; Be; Beryllium; Boron; Isotope; Li; Lithium; Mcmurdo Volcanic Group; Mount Erebus", "locations": "Mount Erebus", "north": null, "nsf_funding_programs": null, "persons": "Ryan, Jeffrey", "project_titles": "The Role of the Forearc in Subduction Zone Chemical Cycles: Elemental and Isotopic Signatures of Forearc Serpentinites, ODP Leg 125", "projects": [{"proj_uid": "p0000244", "repository": "USAP-DC", "title": "The Role of the Forearc in Subduction Zone Chemical Cycles: Elemental and Isotopic Signatures of Forearc Serpentinites, ODP Leg 125"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "B-Be-Li Abundance and Isotope Data: Mt. Erebus-McMurdo Volcanics", "uid": "600020", "west": null}, {"awards": "9615347 Conway, Howard", "bounds_geometry": ["POLYGON((-161.5307 -79.3539,-161.3584 -79.3539,-161.1861 -79.3539,-161.0138 -79.3539,-160.8415 -79.3539,-160.6692 -79.3539,-160.4969 -79.3539,-160.3246 -79.3539,-160.1523 -79.3539,-159.98 -79.3539,-159.8077 -79.3539,-159.8077 -79.37757,-159.8077 -79.40124,-159.8077 -79.42491,-159.8077 -79.44858,-159.8077 -79.47225,-159.8077 -79.49592,-159.8077 -79.51959,-159.8077 -79.54326,-159.8077 -79.56693,-159.8077 -79.5906,-159.98 -79.5906,-160.1523 -79.5906,-160.3246 -79.5906,-160.4969 -79.5906,-160.6692 -79.5906,-160.8415 -79.5906,-161.0138 -79.5906,-161.1861 -79.5906,-161.3584 -79.5906,-161.5307 -79.5906,-161.5307 -79.56693,-161.5307 -79.54326,-161.5307 -79.51959,-161.5307 -79.49592,-161.5307 -79.47225,-161.5307 -79.44858,-161.5307 -79.42491,-161.5307 -79.40124,-161.5307 -79.37757,-161.5307 -79.3539))"], "date_created": "Fri, 23 May 2003 00:00:00 GMT", "description": "This data set consists of bedrock and surface elevation readings taken by ground penetrating radar and Global Positioning System (GPS) on Roosevelt Island, an ice dome within the Ross Ice Shelf. Locations were validated by GPS readings of poles set in the surface snow. The data was collected between November and December, 1997.\n\nData are available via ftp, and are provided in a text file with an accompanying file that provides GPS locations. Surface and bedrock elevations are given in meters above WGS84.", "east": -159.8077, "geometry": ["POINT(-160.6692 -79.47225)"], "keywords": "Antarctica; Elevation; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Roosevelt Island; Solid Earth", "locations": "Roosevelt Island; Antarctica", "north": -79.3539, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Conway, Howard", "project_titles": "Radar Investigations of Former Shear Margins: Roosevelt Island and Ice Stream C", "projects": [{"proj_uid": "p0000164", "repository": "USAP-DC", "title": "Radar Investigations of Former Shear Margins: Roosevelt Island and Ice Stream C"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.5906, "title": "Roosevelt Island Bedrock and Surface Elevations", "uid": "609140", "west": -161.5307}, {"awards": "0512971 Brook, Edward J.", "bounds_geometry": ["POINT(-38.466667 72.5833333)"], "date_created": "Wed, 14 May 2003 00:00:00 GMT", "description": "The data include methane data from the Greenland Ice Sheet Project 2 (GISP2) B \u0026 D Cores. Gas ages were calculated according to the methods described in Brook et\nal. 1996, and are subject to change. Ice ages were calculated by by\nlinear interpolation from the Meese et al. timescale.\n", "east": -38.466667, "geometry": ["POINT(-38.466667 72.5833333)"], "keywords": "Arctic; Chemistry:fluid; Chemistry:Fluid; Chemistry:ice; Chemistry:Ice; Geochemistry; GISP2; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Greenland; Ice Core Records; Methane; Paleoclimate", "locations": "Greenland; Arctic", "north": 72.5833333, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Brook, Edward J.", "project_titles": "High Resolution Records of Atmospheric Methane in Ice Cores and Implications for Late Quaternary Climate Change", "projects": [{"proj_uid": "p0000034", "repository": "USAP-DC", "title": "High Resolution Records of Atmospheric Methane in Ice Cores and Implications for Late Quaternary Climate Change"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": 72.5833333, "title": "GISP2 (B and D Core) Methane Concentrations", "uid": "609125", "west": -38.466667}, {"awards": "9615347 Conway, Howard", "bounds_geometry": ["POLYGON((-161.5667 -79.3889,-161.44836 -79.3889,-161.33002 -79.3889,-161.21168 -79.3889,-161.09334 -79.3889,-160.975 -79.3889,-160.85666 -79.3889,-160.73832 -79.3889,-160.61998 -79.3889,-160.50164 -79.3889,-160.3833 -79.3889,-160.3833 -79.41168,-160.3833 -79.43446,-160.3833 -79.45724,-160.3833 -79.48002,-160.3833 -79.5028,-160.3833 -79.52558,-160.3833 -79.54836,-160.3833 -79.57114,-160.3833 -79.59392,-160.3833 -79.6167,-160.50164 -79.6167,-160.61998 -79.6167,-160.73832 -79.6167,-160.85666 -79.6167,-160.975 -79.6167,-161.09334 -79.6167,-161.21168 -79.6167,-161.33002 -79.6167,-161.44836 -79.6167,-161.5667 -79.6167,-161.5667 -79.59392,-161.5667 -79.57114,-161.5667 -79.54836,-161.5667 -79.52558,-161.5667 -79.5028,-161.5667 -79.48002,-161.5667 -79.45724,-161.5667 -79.43446,-161.5667 -79.41168,-161.5667 -79.3889))"], "date_created": "Wed, 14 May 2003 00:00:00 GMT", "description": "This data set measures the radioactive decay of nuclear material from Northern and Southern hemisphere nuclear testing. Firn cores were taken from three locations on Roosevelt Island, an ice dome within the Ross Ice Shelf, and were measured at increasing depth for density in kilograms per cubic meter, and for beta counts per hour per kilogram.\n\nThe data were collected between November and December of 1997. Measurements were taken incrementally down to approximately 17 meters for each of the three cores. Data are available in text format via ftp.", "east": -160.3833, "geometry": ["POINT(-160.975 -79.5028)"], "keywords": "Antarctica; Beta Count; Density; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Physical Properties; Roosevelt Island", "locations": "Roosevelt Island; Antarctica", "north": -79.3889, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Conway, Howard", "project_titles": "Radar Investigations of Former Shear Margins: Roosevelt Island and Ice Stream C", "projects": [{"proj_uid": "p0000164", "repository": "USAP-DC", "title": "Radar Investigations of Former Shear Margins: Roosevelt Island and Ice Stream C"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.6167, "title": "Roosevelt Island Ice Core Density and Beta Count Data", "uid": "609139", "west": -161.5667}, {"awards": "0126286 McConnell, Joseph", "bounds_geometry": ["POINT(-149 -81)"], "date_created": "Wed, 14 May 2003 00:00:00 GMT", "description": "This data set is part of the WAISCORES project, an NSF-funded project to understand the influence of the West Antarctic ice sheet on climate and sea level change. WAISCORES researchers acquired and analyzed ice cores from the Siple Dome, in the Siple Coast region, West Antarctica.\n\nLamorey measured the density of the shallow Siple Dome cores B - I. One-meter sections of the ice core were weighed on a balance beam in the field. The volume was determined by measuring the diameter and length of the core. The data consists of tab-delimited text files of density measurements and a sonic velocity profile, and a .gif format density-versus-depth plot. Data are available via FTP.", "east": -149.0, "geometry": ["POINT(-149 -81)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Physical Properties; Siple Dome; Siple Dome Ice Core; WAISCORES", "locations": "Siple Dome; Antarctica", "north": -81.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Lamorey, Gregg W.", "project_titles": "Continuous High Resolution Ice-Core Chemistry using ICP-MS at Siple Dome", "projects": [{"proj_uid": "p0000159", "repository": "USAP-DC", "title": "Continuous High Resolution Ice-Core Chemistry using ICP-MS at Siple Dome"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -81.0, "title": "Siple Shallow Core Density Data", "uid": "609129", "west": -149.0}, {"awards": "9527262 Gow, Anthony", "bounds_geometry": ["POINT(-149 -81)"], "date_created": "Wed, 14 May 2003 00:00:00 GMT", "description": "This data set is part of the WAISCORES project, an NSF-funded project to understand the influence of the West Antarctic ice sheet on climate and sea level change. WAISCORES researchers acquired and analyzed ice cores from the Siple Dome, in the Siple Coast region, West Antarctica.\n\nThis data set includes annual layer data for Siple Dome ice cores A, B, and C, based on stratigraphy; thin-section images, and fabric data. The study included the analysis of more than 2500 crystallographic c-axes conducted on 50 thin sections from the main PICO core.", "east": -149.0, "geometry": ["POINT(-149 -81)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Photo/video; Photo/Video; Siple Dome; Siple Dome Ice Core; WAISCORES", "locations": "Siple Dome; Antarctica", "north": -81.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Gow, Tony; Meese, Deb", "project_titles": "Physical and Structural Properties of the Siple Dome Core", "projects": [{"proj_uid": "p0000064", "repository": "USAP-DC", "title": "Physical and Structural Properties of the Siple Dome Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core", "south": -81.0, "title": "Physical and Structural Properties of the Siple Dome Ice Cores", "uid": "609128", "west": -149.0}, {"awards": "9615554 Fitzpatrick, Joan", "bounds_geometry": ["POINT(-149 -81)"], "date_created": "Wed, 14 May 2003 00:00:00 GMT", "description": "This data set is part of the WAISCORES project, an NSF-funded project to understand the influence of the West Antarctic ice sheet on climate and sea level change. WAISCORES researchers acquired and analyzed ice cores from the Siple Dome, in the Siple Coast region, West Antarctica.\n\nThis data set comprises low-resolution (72 dpi) jpg images of thin sections from the Siple Dome ice core. The images were acquired during the 1997/1998 field season, from both the SDM-A, or main 13.2-cm, core and from the hot water core recovered by Hermann Englehardt. The data set includes both vertical and horizontal thin sections. With one exception, all images were recorded in cross-polarized light. Two examples of archived high-resolution (275 dpi) images are provided for direct comparison of the low- and high-resolution images.", "east": -149.0, "geometry": ["POINT(-149 -81)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Photo/video; Photo/Video; Siple Dome; Siple Dome Ice Core; WAISCORES", "locations": "Siple Dome; Antarctica", "north": -81.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Fitzpatrick, Joan", "project_titles": "Digital Imaging for Ice Core Analysis", "projects": [{"proj_uid": "p0000011", "repository": "USAP-DC", "title": "Digital Imaging for Ice Core Analysis"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core", "south": -81.0, "title": "Digital Images of Thin Sections from Siple Dome", "uid": "609127", "west": -149.0}, {"awards": "9527373 Dunbar, Nelia", "bounds_geometry": ["POINT(-149 -81)", "POINT(158.7889 -77.95)"], "date_created": "Wed, 14 May 2003 00:00:00 GMT", "description": "This data set is part of the WAISCORES project, an NSF-funded project to understand the influence of the West Antarctic ice sheet on climate and sea level change. WAISCORES researchers acquired and analyzed ice cores from the Siple Dome, in the Siple Coast region, West Antarctica.\n\nThis data set includes backscattered electron images of tephra samples extracted from the Siple and Taylor Dome ice cores, as well as electron microprobe analyses of glass shards in cases where significant, compositionally-consistent glass populations were present. The data set also includes data on the amount of volcanically derived sulfate deposited on the West Antarctic Ice Sheet and recorded in the Siple Dome ice core.", "east": 158.7889, "geometry": ["POINT(-149 -81)", "POINT(158.7889 -77.95)"], "keywords": "Antarctica; Chemistry:rock; Chemistry:Rock; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Paleoclimate; Siple Dome Ice Core; Taylor Dome Ice Core; Tephra; WAIS; WAISCORES", "locations": "Antarctica; WAIS", "north": -77.95, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Zielinski, Gregory; Dunbar, Nelia", "project_titles": "Collaborative Research: Volcanic Record in Antarctic Ice: Implications for Climatic and Eruptive History and Ice Sheet Dynamics of the South Polar Region", "projects": [{"proj_uid": "p0000065", "repository": "USAP-DC", "title": "Collaborative Research: Volcanic Record in Antarctic Ice: Implications for Climatic and Eruptive History and Ice Sheet Dynamics of the South Polar Region"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Taylor Dome Ice Core; Siple Dome Ice Core", "south": -81.0, "title": "Volcanic Records in the Siple and Taylor Dome Ice Cores", "uid": "609126", "west": -149.0}, {"awards": "9526420 Taylor, Kendrick", "bounds_geometry": ["POINT(-149 -81)"], "date_created": "Thu, 08 May 2003 00:00:00 GMT", "description": "This data set is part of the WAISCORES project, an NSF-funded project to understand the influence of the West Antarctic ice sheet on climate and sea level change. WAISCORES researchers acquired and analyzed ice cores from the Siple Dome, in the Siple Coast region, West Antarctica.\n\nTaylor measured the electrical conductivity (ECM) and Complex Conductivity (CC), a measure of the total ions in the ice, in the main Siple Dome ice core. Measurements were taken along the core from a depth of 0 m to 800 m. The project also analyzed shallower cores for ECM and dielectric properties (DEP). (DEP is also a measure of the total ions in the ice, but with lower spatial resolution than the CC.) Albedo measurements where made on the shallow cores and the main core to a depth of 391 m. The data set includes images showing the electrical conductivity of a vertical section of the core.", "east": -149.0, "geometry": ["POINT(-149 -81)"], "keywords": "Antarctica; Electrical Conductivity; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Physical Properties; Siple Dome; Siple Dome Ice Core; WAISCORES", "locations": "Antarctica; Siple Dome", "north": -81.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Taylor, Kendrick C.", "project_titles": "Electrical and Optical Measurements on the Siple Dome Ice Core", "projects": [{"proj_uid": "p0000163", "repository": "USAP-DC", "title": "Electrical and Optical Measurements on the Siple Dome Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core", "south": -81.0, "title": "Siple Dome Cores Electrical Measurement Data", "uid": "609133", "west": -149.0}, {"awards": "9527373 Dunbar, Nelia", "bounds_geometry": ["POLYGON((158.55 -75.86,158.562 -75.86,158.574 -75.86,158.586 -75.86,158.598 -75.86,158.61 -75.86,158.622 -75.86,158.634 -75.86,158.646 -75.86,158.658 -75.86,158.67 -75.86,158.67 -75.864,158.67 -75.868,158.67 -75.872,158.67 -75.876,158.67 -75.88,158.67 -75.884,158.67 -75.888,158.67 -75.892,158.67 -75.896,158.67 -75.9,158.658 -75.9,158.646 -75.9,158.634 -75.9,158.622 -75.9,158.61 -75.9,158.598 -75.9,158.586 -75.9,158.574 -75.9,158.562 -75.9,158.55 -75.9,158.55 -75.896,158.55 -75.892,158.55 -75.888,158.55 -75.884,158.55 -75.88,158.55 -75.876,158.55 -75.872,158.55 -75.868,158.55 -75.864,158.55 -75.86))"], "date_created": "Tue, 18 Feb 2003 00:00:00 GMT", "description": "This data set is the result of a study of volcanic ash and rock fragment (tephra) layers in exposed blue ice areas on Brimstone Peak (75.888S 158.55E) in East Antarctica. Tephra samples were collected between 15 November 1996 and 15 January 1997.\n\nThe Antarctic ice sheets preserve a record of the volcanic ash layers and chemical aerosol signatures of local and distant volcanic eruptions. Correlation of individual tephra layers, or sets of layers, in blue ice areas will allow a better understanding of the geometry of ice flow in these areas. Tephra layers in deep ice cores can also provide unique time-stratigraphic markers in cores that are difficult to date.\n\nData include the following information for each sample site: a general description, electron microprobe analysis, GPS location, neutron activation analysis, and a visual description of the petrography.Data are provided as Excel 97 data files, JPG map files, and GIF-formatted BSE images. Data are available via ftp.", "east": 158.67, "geometry": ["POINT(158.61 -75.88)"], "keywords": "Antarctica; Blue Ice; Brimstone Peak; Chemistry:rock; Chemistry:Rock; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Petrography; Tephra", "locations": "Antarctica; Brimstone Peak", "north": -75.86, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Dunbar, Nelia", "project_titles": "Collaborative Research: Volcanic Record in Antarctic Ice: Implications for Climatic and Eruptive History and Ice Sheet Dynamics of the South Polar Region", "projects": [{"proj_uid": "p0000065", "repository": "USAP-DC", "title": "Collaborative Research: Volcanic Record in Antarctic Ice: Implications for Climatic and Eruptive History and Ice Sheet Dynamics of the South Polar Region"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -75.9, "title": "Blue Ice Tephra II - Brimstone Peak", "uid": "609114", "west": 158.55}, {"awards": null, "bounds_geometry": null, "date_created": "Mon, 10 Feb 2003 00:00:00 GMT", "description": "The Antarctic Oscillation (AAO) is the dominant pattern of non-seasonal tropospheric circulation variations south of 30S, and it is characterized by pressure anomalies of one sign centered in the Antarctic and anomalies of the opposite sign centered about 40-50S. The AAO is also referred to as the Southern Annular Mode (SAM).\n\nThe AAO is defined as the leading principal component (PC) of 850 hPa geopotential height anomalies south of 30S (Thompson and Wallace 2000). For more information on the construction and analyses of this data, see: http://www.jisao.washington.edu/data/aao/", "east": null, "geometry": null, "keywords": null, "locations": null, "north": null, "nsf_funding_programs": null, "persons": "Mitchell, Todd", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": null, "title": "Antarctic Oscillation (AO) Time Series Data since 1948 from JISAO", "uid": "600023", "west": null}, {"awards": "9527373 Dunbar, Nelia", "bounds_geometry": ["POINT(-159.51 -77.12)"], "date_created": "Sat, 01 Feb 2003 00:00:00 GMT", "description": "This data set is the result of a study of volcanic ash and rock fragment (tephra) layers in exposed blue ice areas on Mt. DeWitt, Antarctica (77.12 deg S, 159.51 deg E). Tephra samples were collected between 15 November 1996 and 15 January 1997.\n\nData include the following information for each sample site: a general description, electron microprobe analysis, GPS location, neutron activation analysis, and a visual description of the petrography. Data are provided as an Excel 97 data file, (this file is also divided into various text files) and TIF images. Data are available via ftp.\n\nAntarctic ice sheets preserve a record of the volcanic ash layers and chemical aerosol signatures of local and distant volcanic eruptions. Correlation of individual tephra layers, or sets of layers, in blue ice areas will allow a better understanding of the geometry of ice flow in these areas. Tephra layers in deep ice cores can also provide unique time-stratigraphic markers in cores that are difficult to date.", "east": -159.51, "geometry": ["POINT(-159.51 -77.12)"], "keywords": "Antarctica; Blue Ice; Chemistry:rock; Chemistry:Rock; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Mount Dewitt; Petrography; Tephra", "locations": "Mount Dewitt; Antarctica", "north": -77.12, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Dunbar, Nelia", "project_titles": "Collaborative Research: Volcanic Record in Antarctic Ice: Implications for Climatic and Eruptive History and Ice Sheet Dynamics of the South Polar Region", "projects": [{"proj_uid": "p0000065", "repository": "USAP-DC", "title": "Collaborative Research: Volcanic Record in Antarctic Ice: Implications for Climatic and Eruptive History and Ice Sheet Dynamics of the South Polar Region"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.12, "title": "Blue Ice Tephra II - Mt. DeWitt", "uid": "609115", "west": -159.51}, {"awards": "9526572 Bales, Roger", "bounds_geometry": ["POINT(-149 -81)"], "date_created": "Thu, 11 Jul 2002 00:00:00 GMT", "description": "This data set is part of the West Antarctic Ice Sheet Cores (WAISCORES) project, an NSF-funded project to understand the influence of the West Antarctic Ice Sheet on climate and sea level change. WAISCORES researchers acquired and analyzed snow pit and core samples from the Siple Dome, in the Siple Coast region, West Antarctica. This data set includes glaciochemical spatial variability data for six Siple Dome snow pits. Samples involved measuring hydrogen peroxide (H\u003csub\u003e2\u003c/sub\u003eO\u003csub\u003e2\u003c/sub\u003e) and formaldehyde (HCHO) in the air, snow, firn, and ice via suppressed ion chromatography. The data can be used to interpret changes in concentrations of these species recorded in ice cores. Data in this collection were obtained during two Antarctic field seasons in 1994 to 1995 and 1996 to 1997. Data are available via FTP in tab-delimited ASCII text (.dat, .txt) file format.", "east": -149.0, "geometry": ["POINT(-149 -81)"], "keywords": "Antarctica; Atmosphere; Chemistry:fluid; Chemistry:Fluid; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Siple Dome; Snow/ice; Snow/Ice; WAISCORES", "locations": "Antarctica; Siple Dome", "north": -81.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "McConnell, Joseph; Bales, Roger", "project_titles": "Snow-Atmosphere Transfer Function for Reversibly Deposited Chemical Species in West Antarctica", "projects": [{"proj_uid": "p0000060", "repository": "USAP-DC", "title": "Snow-Atmosphere Transfer Function for Reversibly Deposited Chemical Species in West Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -81.0, "title": "Snow-atmosphere Transfer Function for Reversibly Deposited Chemical Species in West Antarctica", "uid": "609122", "west": -149.0}, {"awards": "9526449 Mayewski, Paul", "bounds_geometry": ["POLYGON((-149.11 -81.05,-149.05 -81.05,-148.99 -81.05,-148.93 -81.05,-148.87 -81.05,-148.81 -81.05,-148.75 -81.05,-148.69 -81.05,-148.63 -81.05,-148.57 -81.05,-148.51 -81.05,-148.51 -81.11,-148.51 -81.17,-148.51 -81.23,-148.51 -81.29,-148.51 -81.35,-148.51 -81.41,-148.51 -81.47,-148.51 -81.53,-148.51 -81.59,-148.51 -81.65,-148.57 -81.65,-148.63 -81.65,-148.69 -81.65,-148.75 -81.65,-148.81 -81.65,-148.87 -81.65,-148.93 -81.65,-148.99 -81.65,-149.05 -81.65,-149.11 -81.65,-149.11 -81.59,-149.11 -81.53,-149.11 -81.47,-149.11 -81.41,-149.11 -81.35,-149.11 -81.29,-149.11 -81.23,-149.11 -81.17,-149.11 -81.11,-149.11 -81.05))"], "date_created": "Thu, 11 Jul 2002 00:00:00 GMT", "description": "This data set is part of the West Antarctic Ice Sheet cores (WAISCORES) project, an NSF-funded project to understand the influence of the West Antarctic Ice Sheet on climate and sea level change. WAISCORES researchers acquired and analyzed snow pit and core samples from the Siple Dome, in the Siple Coast region, West Antarctica.\n\nThis data set includes glaciochemical spatial variability data for Siple Dome snow pits B, E, F, G, H, and 1 through 6. Samples were analyzed for soluble ion content via suppressed ion chromatography. Each pit was sampled at 2 cm resolution for ion chemistry using clean procedures, and sampled again at 3 cm resolution for density calculations. Snow pit names and locations correspond to the 1996 to 1997 season shallow core sites.\n\nData in this collection were obtained during two Antarctic field seasons in 1994 to 1995 and 1996 to 1997. Data are available via FTP in space-delimited ASCII text (.dat) file format.", "east": -148.51, "geometry": ["POINT(-148.81 -81.35)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Core Records; Paleoclimate; Snow/ice; Snow/Ice; Snow Pit; WAIS; WAISCORES", "locations": "WAIS; Antarctica", "north": -81.05, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Kreutz, Karl; Mayewski, Paul A.", "project_titles": "Siple Dome Deep Ice Core Glaciochemistry and Regional Survey - A Contribution to the WAIS Initiative", "projects": [{"proj_uid": "p0000012", "repository": "USAP-DC", "title": "Siple Dome Deep Ice Core Glaciochemistry and Regional Survey - A Contribution to the WAIS Initiative"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -81.65, "title": "WAISCORES Snow Pit Chemistry, Antarctica", "uid": "609420", "west": -149.11}, {"awards": "0338359 Saltzman, Eric", "bounds_geometry": ["POINT(-149 -81)"], "date_created": "Wed, 10 Jul 2002 00:00:00 GMT", "description": "This data set is part of the West Antarctic Ice Sheet cores (WAISCORES) project, an NSF-funded project to understand the influence of the West Antarctic ice sheet on climate and sea level change. WAISCORES researchers acquired and analyzed ice cores from the Siple Dome, in the Siple Coast region, West Antarctica. Siple Dome ice cores were analyzed for methanesulfonate (MSA) and carbonyl sulfide (OCS). The methanesulfonate analysis was done on cores A-E and a hot water core, and the carbonyl sulfide analysis was done on 11 C cores. Methanesulfonate data include the sample identification number, depth, and methanesulfonate parts per billion (ppb) of each sample. Carbonyl sulfide data include the depth, OCS parts per trillion (ppt) of each sample, percent error, and gas age (years). Data are available via FTP in tab-delimited ASCII text (.dat, .txt) file format.", "east": -149.0, "geometry": ["POINT(-149 -81)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Methane; Siple Dome; Siple Dome Ice Core; WAISCORES", "locations": "Antarctica; Siple Dome", "north": -81.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Saltzman, Eric; Aydin, Murat", "project_titles": "Methyl chloride and methyl bromide in Antarctic ice cores", "projects": [{"proj_uid": "p0000032", "repository": "USAP-DC", "title": "Methyl chloride and methyl bromide in Antarctic ice cores"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core", "south": -81.0, "title": "Methane and Carbonyl Sulfide Analysis of Siple Dome Ice Core Subsamples", "uid": "609131", "west": -149.0}, {"awards": "9615167 Dunbar, Nelia", "bounds_geometry": ["POINT(-148 -81)", "POINT(158.71 -77.8)"], "date_created": "Sat, 01 Jun 2002 00:00:00 GMT", "description": "This data set consists of electron microprobe geochemical analyses of glass shards sampled from Siple Dome and Taylor Dome ice cores during the 1999-2000 field season. Geochemical data are in tab-delimited ASCII and Excel formats. Backscattered electron images of tephra samples are in TIFF format. Data are available via ftp.", "east": 158.71, "geometry": ["POINT(-148 -81)", "POINT(158.71 -77.8)"], "keywords": "Antarctica; Backscattered Electron Images; Chemistry:rock; Chemistry:Rock; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Siple Dome; Siple Dome Ice Core; Taylor Dome Ice Core; WAIS", "locations": "WAIS; Antarctica; Siple Dome", "north": -77.8, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Dunbar, Nelia", "project_titles": "Collaborative Research: Volcanic Record in Antarctic Ice: Implications for Climatic and Eruptive History and Ice Sheet Dynamics of the South Polar Region", "projects": [{"proj_uid": "p0000065", "repository": "USAP-DC", "title": "Collaborative Research: Volcanic Record in Antarctic Ice: Implications for Climatic and Eruptive History and Ice Sheet Dynamics of the South Polar Region"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Taylor Dome Ice Core; Siple Dome Ice Core", "south": -81.0, "title": "Tephra in Siple and Taylor Dome Ice Cores", "uid": "609110", "west": -148.0}, {"awards": "9615292 Wahlen, Martin", "bounds_geometry": ["POINT(158.71 -77.8)"], "date_created": "Tue, 01 Jan 2002 00:00:00 GMT", "description": "These data describe the concentration and carbon-isotopic composition (d13CO2) of atmospheric CO2 from air trapped in ice between 27,000 and 1,300 years before present from Taylor Dome, Antarctica. Data are used to investigate the causes of the CO2 concentration increase that occurred during the transition between the last glacial maximum (LGM) and the Holocene. Data are in tab-delimited ASCII and Excel formats, and are available via ftp.", "east": 158.71, "geometry": ["POINT(158.71 -77.8)"], "keywords": "Antarctica; Atmosphere; Chemistry:fluid; Chemistry:Fluid; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Paleoclimate; Taylor Dome; Taylor Dome Ice Core", "locations": "Antarctica; Taylor Dome", "north": -77.8, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Wahlen, Martin", "project_titles": "Carbon Dioxide and Carbon Isotopes in the Taylor Dome and Vostok Ice Cores", "projects": [{"proj_uid": "p0000153", "repository": "USAP-DC", "title": "Carbon Dioxide and Carbon Isotopes in the Taylor Dome and Vostok Ice Cores"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.8, "title": "Carbon-Isotopic Composition of Atmospheric CO2 since the Last Glacial Maximum", "uid": "609108", "west": 158.71}, {"awards": "9318121 Anandakrishnan, Sridhar; 9222121 Dalziel, Ian", "bounds_geometry": ["POINT(106.48 -72.28)"], "date_created": "Tue, 01 Jan 2002 00:00:00 GMT", "description": "These data describe the d18O of O2, d15N of N2, d18Oatm, and O2/N2 ratios of trapped gases in the Vostok ice core from East Antarctica. The investigator used a mass spectrometer to measure gas concentrations and isotopic compositions. Data extend to approximately 420,000 years ago. Two different age models are included.\n\nData are available in tab-delimited ASCII format via ftp.", "east": 106.48, "geometry": ["POINT(106.48 -72.28)"], "keywords": "Antarctica; Chemistry:fluid; Chemistry:Fluid; Geochemistry; Glaciology; Ice Core Records; Lake Vostok; Paleoclimate; UPLC-Q-TOF; Vostok Ice Core", "locations": "Lake Vostok; Antarctica", "north": -72.28, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Bender, Michael", "project_titles": "Collaborative Research: Seismic Traverse of the Byrd Subglacial Basin-Field Test", "projects": [{"proj_uid": "p0000150", "repository": "USAP-DC", "title": "Collaborative Research: Seismic Traverse of the Byrd Subglacial Basin-Field Test"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -72.28, "title": "Concentration and Isotopic Composition of O2 and N2 in Trapped Gases of the Vostok Ice Core", "uid": "609107", "west": 106.48}, {"awards": "9316715 Taylor, Susan", "bounds_geometry": ["POINT(0 -90)"], "date_created": "Tue, 01 Jan 2002 00:00:00 GMT", "description": "Micrometeorites dated between 1100 A.D. to 1500 A.D. were collected from the bottom of the South Pole Water Well in December 1995. Element analyses of 181 cosmic glass spherule and micrometeorite samples are in ASCII text and Excel spreadsheet format. Scanning Electron Microscope (SEM) images of the spherules and micrometeorites are in TIFF format. Data are available via ftp.", "east": 0.0, "geometry": ["POINT(0 -90)"], "keywords": "Antarctica; Chemistry:rock; Chemistry:Rock; Cosmos; Geochemistry; Meteorite; Scanning Electron Microscope (SEM) Images; South Pole", "locations": "South Pole; Antarctica", "north": -90.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Taylor, Susan", "project_titles": "Retrieval and Analysis of Extraterrestrial Particles from the Water Well at the South Pole Station, Antarctica", "projects": [{"proj_uid": "p0000057", "repository": "USAP-DC", "title": "Retrieval and Analysis of Extraterrestrial Particles from the Water Well at the South Pole Station, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Micrometeorites from the South Pole Water Well", "uid": "609113", "west": 0.0}, {"awards": "XXXXXXX Palais, Julie", "bounds_geometry": ["POINT(-149 -81)"], "date_created": "Tue, 01 Jan 2002 00:00:00 GMT", "description": "The WAISCORES project is part of the National Science Foundation Office of Polar Programs\u0027 West Antarctic Ice Sheet (WAIS) initiative, which is aimed at understanding the influence of the West Antarctic ice sheet on climate and sea level change.\nWAISCORES researchers acquired and analyzed ice cores from the Siple Dome, in the Siple Coast region, West Antarctica. These cores allow researchers to distinguish local from regional influences on the climate records recovered from the cores. Drilling for the Siple Dome core began in November 1996 and finished in January 1999. The core site is located between ice streams C and D at approximately 81\u00b0 40\u0027 S and 148\u00b0 49\u0027 W. Preliminary studies indicate that the paleoclimate record preserved in the 1003-meter Siple Dome ice core extends back more than 90 thousand years. Data are available via ftp.\n\nThe following WAISCORES investigators have made contributions to WAISCORES research. NSIDC archives data for many of these investigators: Mary Albert, Richard Alley, Robin Bell, Michael Bender, Robert Bindscadler, Pierre Biscaye, Donald Blankenship, Ed Brook, Nelia Dunbar, Joan Fitzpatrick, Tony Gow, Gregg Lamorey, Paul Mayewski, Joseph McConnell, Deb Meese, Nadine Nereson, Charlie Raymond, Eric Saltzman, Eric Steig, Christopher Shuman, Ken Taylor, Lonnie Thompson, Edwin Waddington, Martin Wahlen, James White, and Gret Zielinksi.\n\nThis landing page has no data files!", "east": -149.0, "geometry": ["POINT(-149 -81)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; WAIS; WAISCORES", "locations": "WAIS; Antarctica", "north": -81.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Lamorey, Gregg W.", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -81.0, "title": "WAISCORES: Deep Ice Coring in West Antarctica", "uid": "609120", "west": -149.0}, {"awards": "9526601 Albert, Mary", "bounds_geometry": ["POINT(-148 -81)"], "date_created": "Sat, 01 Dec 2001 00:00:00 GMT", "description": "This data set includes measurements of snow and firn temperature and permeability collected between November 1998 and June 1999 at Siple Dome. The physical characteristics of snow determine the nature of air-snow exchange processes, which in turn affect chemical records in ice cores. Thus a better understanding of the physical properties of snow will improve interpretation of ice core records of atmospheric composition.\n\nData are available via ftp in both ASCII and Excel formats.", "east": -148.0, "geometry": ["POINT(-148 -81)"], "keywords": "Antarctica; Glaciology; Permeability; Siple Dome; Siple Dome Ice Core; Snow/ice; Snow/Ice; Temperature", "locations": "Siple Dome; Antarctica", "north": -81.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Albert, Mary R.", "project_titles": "Near-Surface Processes Affecting Gas Exchange: West Antarctic Ice Sheet", "projects": [{"proj_uid": "p0000061", "repository": "USAP-DC", "title": "Near-Surface Processes Affecting Gas Exchange: West Antarctic Ice Sheet"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core", "south": -81.0, "title": "Snow and Firn Temperature and Permeability Measurements from Siple Dome, Antarctica", "uid": "609100", "west": -148.0}, {"awards": "9318121 Anandakrishnan, Sridhar; 9222121 Dalziel, Ian", "bounds_geometry": ["POLYGON((-121.644 -82.2764,-121.4814 -82.2764,-121.3188 -82.2764,-121.1562 -82.2764,-120.9936 -82.2764,-120.831 -82.2764,-120.6684 -82.2764,-120.5058 -82.2764,-120.3432 -82.2764,-120.1806 -82.2764,-120.018 -82.2764,-120.018 -82.28496,-120.018 -82.29352,-120.018 -82.30208,-120.018 -82.31064,-120.018 -82.3192,-120.018 -82.32776,-120.018 -82.33632,-120.018 -82.34488,-120.018 -82.35344,-120.018 -82.362,-120.1806 -82.362,-120.3432 -82.362,-120.5058 -82.362,-120.6684 -82.362,-120.831 -82.362,-120.9936 -82.362,-121.1562 -82.362,-121.3188 -82.362,-121.4814 -82.362,-121.644 -82.362,-121.644 -82.35344,-121.644 -82.34488,-121.644 -82.33632,-121.644 -82.32776,-121.644 -82.3192,-121.644 -82.31064,-121.644 -82.30208,-121.644 -82.29352,-121.644 -82.28496,-121.644 -82.2764))", "POLYGON((-152.598 -81.8039,-149.8369 -81.8039,-147.0758 -81.8039,-144.3147 -81.8039,-141.5536 -81.8039,-138.7925 -81.8039,-136.0314 -81.8039,-133.2703 -81.8039,-130.5092 -81.8039,-127.7481 -81.8039,-124.987 -81.8039,-124.987 -81.90464,-124.987 -82.00538,-124.987 -82.10612,-124.987 -82.20686,-124.987 -82.3076,-124.987 -82.40834,-124.987 -82.50908,-124.987 -82.60982,-124.987 -82.71056,-124.987 -82.8113,-127.7481 -82.8113,-130.5092 -82.8113,-133.2703 -82.8113,-136.0314 -82.8113,-138.7925 -82.8113,-141.5536 -82.8113,-144.3147 -82.8113,-147.0758 -82.8113,-149.8369 -82.8113,-152.598 -82.8113,-152.598 -82.71056,-152.598 -82.60982,-152.598 -82.50908,-152.598 -82.40834,-152.598 -82.3076,-152.598 -82.20686,-152.598 -82.10612,-152.598 -82.00538,-152.598 -81.90464,-152.598 -81.8039))"], "date_created": "Sat, 01 Dec 2001 00:00:00 GMT", "description": "Ice velocity data from ice stream C, including the body of the ice stream and its area of onset, are available. The investigator calculated velocities from precise ice displacement measurements made with a geodetic-quality Global Positioning System (GPS). These ice displacement measurements accompanied seismic experiments aimed at understanding controls on the flow of ice streams in west Antarctica. An understanding of ice stream flow is essential to predicting the response of the West Antarctic Ice Sheet to future climate change.\n\nData are available in ASCII format via ftp.", "east": -120.018, "geometry": ["POINT(-120.831 -82.3192)", "POINT(-138.7925 -82.3076)"], "keywords": "Antarctica; Geodesy; Geology/Geophysics - Other; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPS; WAIS", "locations": "Antarctica; WAIS", "north": -81.8039, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Anandakrishnan, Sridhar", "project_titles": "Microearthquake Monitoring of Ice Stream C, West Antarctica: A Sensor for Sticky Spots", "projects": [{"proj_uid": "p0000161", "repository": "USAP-DC", "title": "Microearthquake Monitoring of Ice Stream C, West Antarctica: A Sensor for Sticky Spots"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -82.8113, "title": "Ice Velocity Data from Ice Stream C, West Antarctica", "uid": "609106", "west": -152.598}, {"awards": "9980538 Lohmann, Kyger", "bounds_geometry": null, "date_created": "Mon, 11 Jun 2001 00:00:00 GMT", "description": "Geochemical composition of shells of the bivalve, Cucullaea from the La Meseta Formation, Seymour Island, Antarctica.", "east": null, "geometry": null, "keywords": null, "locations": null, "north": null, "nsf_funding_programs": null, "persons": "Lohmann, Kyger", "project_titles": "Evolution of Sea Surface Temperatures in the Coastal Antarctic Paleoenvironment During the Late Cretaceous and Paleogene", "projects": [{"proj_uid": "p0000613", "repository": "USAP-DC", "title": "Evolution of Sea Surface Temperatures in the Coastal Antarctic Paleoenvironment During the Late Cretaceous and Paleogene"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Stable isotope and minor element proxies for Eocene climate of Seymour Island, Antarctica", "uid": "600019", "west": null}, {"awards": "XXXXXXX Palais, Julie", "bounds_geometry": null, "date_created": "Mon, 01 Jan 2001 00:00:00 GMT", "description": "Recent changes in the extent and stability of ice shelves in the Antarctic Peninsula prompted NSIDC to begin a monitoring program using data from the AVHRR Polar 1 km Data Set. NSIDC regularly reviews images of those ice shelves considered susceptible to rapid change due to climatic warming, and of several other major shelves that occasionally calve major icebergs.\n\nThe images in this site represent a selected subset of the available scenes, generally the clearest and most informative scenes available. The scenes are derived from either the AVHRR visible (vis) or thermal (temp) channels, enhanced by combining two channels using principal components processing. In the thermal images, bright areas are colder areas. A few additional scenes from other sensors (MODIS, Landsat) are included to provide some supplemental information on ice shelf structure and events.\n\nIf you wish to save an image, you can do so through the \u0027Save image as\u0027 option of the browser\u0027s pop-up menu. For more information contact NSIDC User Services.", "east": null, "geometry": null, "keywords": "Antarctica; AVHRR; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Sample/collection Description; Sample/Collection Description; Sea Ice", "locations": "Antarctica", "north": null, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Scambos, Ted; Raup, Bruce H.; Bohlander, Jennifer", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": null, "title": "Images of Antarctic Ice Shelves", "uid": "609102", "west": null}, {"awards": "9725918 Brook, Edward J.; 9725305 Severinghaus, Jeffrey", "bounds_geometry": ["POINT(-102 -89.997)", "POINT(-148.767 -81.667)"], "date_created": "Mon, 01 Jan 2001 00:00:00 GMT", "description": "This data set includes d15N, d18O/2, dO2/N2/4, d40Ar/4, d38/Ar/2,\nd84Kr/48, and d132Xe/96 values for air drawn from the top 15 to 50 m\nof firn at the South Pole (summer and winter 1998) and a site at Siple\nDome (summers 1996 and 1998). Data also include related firn\ntemperature measurements.\n\nThe objective of this research was to better understand thermal\nfractionation processes affecting records of atmospheric history from\nfirn and ice core gases. Recent work (e.g., Severinghaus and Brook,\n1999) has exploited trapped air in ice and deep firn as a record of\npast atmospheric composition and climate change. Interpretation of these paleoclimate archives is complicated by artifacts of thermal\ndiffusion, a process in which heavier gases migrate down temperature\ngradients toward colder regions in the firn. Seasonal temperature\nchange at the snow surface creates strong temperature gradients in the\ntop few meters of the firn, which cause isotopic fractionation of firn\ngases. A specific goal of this research is to identify any long-term\neffects of seasonal temperature fluctuations on firn air isotopic\nanomalies.", "east": -102.0, "geometry": ["POINT(-102 -89.997)", "POINT(-148.767 -81.667)"], "keywords": "Antarctica; Atmosphere; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciology; Isotope; Paleoclimate; Siple Dome; Snow/ice; Snow/Ice; South Pole; Temperature", "locations": "Siple Dome; Antarctica; South Pole", "north": -81.667, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Severinghaus, Jeffrey P.; Battle, Mark; Grachev, Alexi", "project_titles": "Thermal Fractionation of Firn Air and the Ice Core Record of Abrupt Interstadial Climate Change", "projects": [{"proj_uid": "p0000160", "repository": "USAP-DC", "title": "Thermal Fractionation of Firn Air and the Ice Core Record of Abrupt Interstadial Climate Change"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core", "south": -89.997, "title": "Firn Air Isotope and Temperature Measurements from Siple Dome and South Pole", "uid": "609098", "west": -148.767}, {"awards": "XXXXXXX Palais, Julie", "bounds_geometry": ["POINT(162 -77)"], "date_created": "Fri, 01 Jan 1999 00:00:00 GMT", "description": "Snow pit and ice core data from the Newall Glacier (location - 162 30\u0027\nEast, 77 35\u0027 South) were collected during 1987 and 1988. These include\ninformation on chemistry, Beta profiles and stratigraphy. Ice cores\nwere collected during the austral summer of 1988-1989 and contain\ninformation on chemistry, Pb- 210 profiles, density profiles and\ntemperature profiles. Core A was 175 meters long and core B was 150\nmeters long.\n\nThe snow pits were dug and sampled by the Glacier Research Group\n(GRG), using established protocols to prevent contamination. The\nsamples for major ion chemistry remained frozen until melted for\nanalysis in the GRG lab, located at the University of New Hampshire\n(UNH), and all core processing was done by GRG established protocols\nto prevent contamination. Major ions were analyzed using suppressed\nion chromatography.", "east": 162.0, "geometry": ["POINT(162 -77)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Newall Glacier; Paleoclimate; Snow/ice; Snow/Ice", "locations": "Newall Glacier; Antarctica", "north": -77.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Mayewski, Paul A.; Whitlow, Sallie", "project_titles": "Characterization of Climatic Events for the Last 2 x 103y through the Retrieval of Ice Cores from the Transantarctic Mountains, Antarctica", "projects": [{"proj_uid": "p0000169", "repository": "USAP-DC", "title": "Characterization of Climatic Events for the Last 2 x 103y through the Retrieval of Ice Cores from the Transantarctic Mountains, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.0, "title": "Newall Glacier Snow Pit and Ice Core, 1987 to 1989", "uid": "609088", "west": 162.0}, {"awards": "XXXXXXX Palais, Julie", "bounds_geometry": ["POINT(166 -85)"], "date_created": "Fri, 01 Jan 1999 00:00:00 GMT", "description": "Information from snow pits and an ice core were collected at Dominion Range (location - 166 10\u0027 East, 85 15\u0027 South, elevation - 2,700m) in 1984-1985. The 6 meter snow pit was dug and sampled in 1984-1985 with a 3 cm sampling interval. Four 1 meter snow pits were dug and sampled in 1984-1985 with a 3 cm sampling interval. One core was drilled during the austral summer 1984-1985 with a depth of 160 meters.\n\nChemistry and density data were collected from the 1 meter pits. Chemistry, beta profile and density data were collected from the 6 meter snow pits. Chemistry (Na NH4, K, Mg, Ca, Cl, NO3, SO4, MSA), particles and a lead-210 profile were collected from the ice core.", "east": 166.0, "geometry": ["POINT(166 -85)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Dominion Range; Geochemistry; Glaciology; Ice Core Records; Paleoclimate; Snow/ice; Snow/Ice", "locations": "Antarctica; Dominion Range", "north": -85.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Mayewski, Paul A.; Whitlow, Sallie", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -85.0, "title": "Dominion Range Snow Pit and Ice Core, 1984 and 1985", "uid": "609087", "west": 166.0}, {"awards": "9316338 Jacobel, Robert", "bounds_geometry": ["POLYGON((-155 -81,-154 -81,-153 -81,-152 -81,-151 -81,-150 -81,-149 -81,-148 -81,-147 -81,-146 -81,-145 -81,-145 -81.2,-145 -81.4,-145 -81.6,-145 -81.8,-145 -82,-145 -82.2,-145 -82.4,-145 -82.6,-145 -82.8,-145 -83,-146 -83,-147 -83,-148 -83,-149 -83,-150 -83,-151 -83,-152 -83,-153 -83,-154 -83,-155 -83,-155 -82.8,-155 -82.6,-155 -82.4,-155 -82.2,-155 -82,-155 -81.8,-155 -81.6,-155 -81.4,-155 -81.2,-155 -81))"], "date_created": "Fri, 01 Jan 1999 00:00:00 GMT", "description": "The Siple Dome Glaciology and Ice Stream History project was part of Western Divide West Antarctic Ice Cores (WAISCORES), an NSF-funded project to understand the influence of the West Antarctic ice sheet on climate and sea level change. WAISCORES researchers acquired and analyzed ice cores from the Siple Dome, in the Siple Coast region, West Antarctica.\n\nThis project supported glaciological studies of Siple Dome and its surroundings between Ice Streams C and D, via two major goals. First, it sought to characterize the dynamic environment and ice stratigraphy of Siple Dome and its surroundings, with the specific mission of assessing Siple Dome as a potential deep core site; and second, to determine whether the configuration of ice stream flow in the region has changed over time. Both goals are relevant to understanding the dynamics of the West Antarctic Ice Sheet (WAIS), its history, and potential future behavior.\n\nThis project was a collaboration between Saint Olaf College, the University of Washington, and the National Snow and Ice Data Center at the University of Colorado. It included studies of satellite imagery and acquisition and analysis of field data from GPS, firn cores and snow pits, and ground-based ice-penetrating radar.\n\nData in this collection were obtained during two Antarctic field seasons in 1994\u201395 and 1996\u201397. The data set is available via FTP as Microsoft Excel Spreadsheet (.xls) and ASCII tab delimited (.txt) files. Related notes are available as a Microsoft Word (.doc) or text (.txt) file. Related images and charts are available as Graphics Interchange Format (.gif) and Joint Photographic Experts Group (.jpg) files.", "east": -145.0, "geometry": ["POINT(-150 -82)"], "keywords": "Antarctica; Geology/Geophysics - Other; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Sample/collection Description; Sample/Collection Description; Siple Dome; Siple Dome Ice Core", "locations": "Antarctica; Siple Dome", "north": -81.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Jacobel, Robert", "project_titles": "Siple Dome Glaciology and Ice Stream History", "projects": [{"proj_uid": "p0000190", "repository": "USAP-DC", "title": "Siple Dome Glaciology and Ice Stream History"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core", "south": -83.0, "title": "Siple Dome Glaciology and Ice Stream History 1994, 1996", "uid": "609085", "west": -155.0}, {"awards": "XXXXXXX Palais, Julie", "bounds_geometry": ["POINT(65 -75)"], "date_created": "Fri, 01 Jan 1999 00:00:00 GMT", "description": "Major ion concentration values (Na, Mg, Ca, Cl, NO3, SO4, MSA) were\nanalyzed from a 20-meter ice core drilled in Dronning Maud Land,\nAntarctica (location - 65 01\u0027 East, 75 00\u0027 South, elevation - 2,900 m\na.s.l.). The core was drilled during the austral summer\n1991-1992. Major ion analysis was by ion chromatography. The anions\nwere analyzed on a Dionex AS4A column; the cations on a Dionex CS12\ncolumn and MSA on a Dionex AS4 column. All used suppressed chromatography. Using established protocols to prevent contamination,\nthe core was processed into 3-centimeter pieces by the Glacier\nResearch Group at the University of New Hampshire\u0027s Climate Change\nResearch Center. The 3-cm pieces were kept frozen until major ion\nanalysis.", "east": 65.0, "geometry": ["POINT(65 -75)"], "keywords": "Antarctica; Chemistry:ice; Chemistry:Ice; Dronning Maud Land; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Paleoclimate; Snow/ice; Snow/Ice", "locations": "Antarctica; Dronning Maud Land", "north": -75.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Whitlow, Sallie; Mayewski, Paul A.", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -75.0, "title": "Dronning Maud Land, Antarctica, Ice Core, 1991 and 1992", "uid": "609089", "west": 65.0}, {"awards": "9526374 Alley, Richard", "bounds_geometry": ["POINT(-149 -81)"], "date_created": "Wed, 01 Jan 1997 00:00:00 GMT", "description": "This data set is part of the West Antarctic Ice Sheet cores (WAISCORES) project, an NSF-funded project to understand the influence of the West Antarctic Ice Sheet on climate and sea level change. WAISCORES researchers acquired and analyzed ice cores from the Siple Dome, in the Siple Coast region, West Antarctica.\n\nThis data set includes melt layers and annual layer data for Siple Dome cores A through J, and upstream core C (UpC). Cores were examined on a light table after the core had been sectioned longitudinally and samples removed for isotopic, chemical, and other analyses, and after the surface had been smoothed using a planer. Major stratigraphic features were noted, such as coarse-grained and fine-grained firn at shallow depths, and coarse-bubbled and fine-bubbled ice at greater depth. Melt layers were identified as bubble-free or nearly-bubble-free zones. Core lengths ranged from 30 to 133 meters.\n\nData in this collection were obtained in the summer of 1997. The data set is available via FTP as ACSII data (.dat), metadata (.meta) and text (.txt) files.", "east": -149.0, "geometry": ["POINT(-149 -81)"], "keywords": "Antarctica; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Paleoclimate; Sample/collection Description; Sample/Collection Description; Siple Dome; Siple Dome Ice Core; WAISCORES", "locations": "Antarctica; Siple Dome", "north": -81.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Alley, Richard", "project_titles": "Physical Properties of the Siple Dome Deep Ice Core", "projects": [{"proj_uid": "p0000059", "repository": "USAP-DC", "title": "Physical Properties of the Siple Dome Deep Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core", "south": -81.0, "title": "Visible Stratigraphic Dating, Siple Dome and Upstream C Cores", "uid": "609121", "west": -149.0}, {"awards": null, "bounds_geometry": null, "date_created": "Fri, 01 Jan 1993 00:00:00 GMT", "description": "This gridded dataset consists of output from the Polar MM5, a version of the Pennsylvania State University / National Center for Atmospheric Research Fifth Generation Mesoscale Model (MM5; version 2) modified for use over extensive ice sheets. More information on the Polar MM5, including a model description and validation studies, is available at http://www-bprc.mps.ohio-state.edu. A series of 72-h non-hydrostatic forecasts are run for a 1-y period (Jan 1993-Dec 1993) overAntarctica and the high-latitude Southern Ocean. The first 24-h of each forecast are discarded for spin up. The horizontal grid resolution is 60-km, with 120 grid points in the x and y direction. The model topography data are interpolated from a 5-km resolution digital elevation model. The ice shelves are manually identified from climatic maps, and represented as permanent ice. The vertical resolution is represented by 28 sigma levels, with the lowest at 11-m above ground level. The initial and boundary conditions include 12-hourly ECMWF TOGA (2.5 deg) global analysis for the surface and upper air variables, 6-hourly ECMWF TOGA (1.125 deg) global analysis for sea surface temperature, and daily DMSP SSM/I polar gridded sea ice concentration (25-km) from the National Snow and Ice Data Center. Model output is in native MM5 format, and available variables are numerous, The reader is referred to the MM5 website for a complete list of variables, as well as detailed documentation and tools for reading and plotting the data. Go to the MM5 homepage at http://www.mmm.ucar.edu/mm5/mm5-home.html. This dataset is currently available upon request from the Polar Meteorology Group, Byrd Polar Research Center, Columbus, OH. Email David Bromwich (bromwich@polarmet1.mps.ohio-state.edu).", "east": null, "geometry": null, "keywords": null, "locations": null, "north": null, "nsf_funding_programs": null, "persons": "Bromwich, David", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": null, "title": "Polar MM5 model output over Antarctica and high-latitude Southern Ocean during 1993", "uid": "600001", "west": null}]

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