USAP-DC

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Antarctic Peninsula; Cryosphere; Macroalgae", "locations": "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": "Chemical composition data for Desmarestia menziesii", "uid": "601882", "west": -67.77137}, {"awards": "1744584 Klein, Andrew; 1744602 Iken, Katrin; 1744570 Galloway, Aaron; 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": "Tue, 21 Jan 2025 00:00:00 GMT", "description": "This dataset consists of a file with results of chemical analyses of the brown macroalga Himantothallus grandifolius 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; Cryosphere; Macroalgae", "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": "Chemical composition data for Himantothallus grandifolius", "uid": "601883", "west": -67.77137}, {"awards": "1744584 Klein, Andrew; 1744550 Amsler, Charles; 1744602 Iken, Katrin; 1744570 Galloway, Aaron", "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": "Tue, 21 Jan 2025 00:00:00 GMT", "description": "This dataset consists of a file with results of chemical analyses of the red macroalga Sarcopeltis antarctica 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; Cryosphere; Macroalgae", "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": "Chemical composition data for Sarcopeltis antarctica ", "uid": "601885", "west": -67.77137}, {"awards": "1542778 Alley, Richard", "bounds_geometry": ["POLYGON((-180 -89,-144 -89,-108 -89,-72 -89,-36 -89,0 -89,36 -89,72 -89,108 -89,144 -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 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -89.9,-180 -89.8,-180 -89.7,-180 -89.6,-180 -89.5,-180 -89.4,-180 -89.3,-180 -89.2,-180 -89.1,-180 -89))"], "date_created": "Wed, 15 Jan 2025 00:00:00 GMT", "description": "This data set includes the bubble number-density data measured in the SPC14 South Pole Ice Core from depths of 160 m to 1200 m. Traditional bubble-section data are included measured from 53 samples taken at 20 m intervals (tab 1). Additionally, we include new micro-CT data from 11 new samples taken at 100 m intervals (tab 2). The data set also includes modeled temperature reconstructions based on the model developed by Spencer and others (2006) and Fegyveresi and others (2011). This data set also includes a tab for bubble sizes measured in the traditional bubble-sections.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctic; Antarctica; Bubble Number Density; Cryosphere; Glaciers; Glaciology; Ice; Ice Core Data; Ice Core Records; NSF-ICF Microtome and Photography Stage; Paleoclimate; Physical Properties; Snow; South Pole", "locations": "Antarctica; Antarctic; South Pole; Antarctica", "north": -89.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Fegyveresi, John", "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 (SPC14) Bubble Number-Density Data", "uid": "601880", "west": -180.0}, {"awards": "2042032 Huckstadt, Luis", "bounds_geometry": ["POLYGON((-120 -60,-112 -60,-104 -60,-96 -60,-88 -60,-80 -60,-72 -60,-64 -60,-56 -60,-48 -60,-40 -60,-40 -62,-40 -64,-40 -66,-40 -68,-40 -70,-40 -72,-40 -74,-40 -76,-40 -78,-40 -80,-48 -80,-56 -80,-64 -80,-72 -80,-80 -80,-88 -80,-96 -80,-104 -80,-112 -80,-120 -80,-120 -78,-120 -76,-120 -74,-120 -72,-120 -70,-120 -68,-120 -66,-120 -64,-120 -62,-120 -60))"], "date_created": "Mon, 13 Jan 2025 00:00:00 GMT", "description": "", "east": -40.0, "geometry": ["POINT(-80 -70)"], "keywords": "Antarctica; Cryosphere", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Huckstadt, Luis", "project_titles": "NSFGEO-NERC Collaborative Research: Effects of a Changing Climate on the Habitat Utilization, Foraging Ecology and Distribution of Crabeater Seals", "projects": [{"proj_uid": "p0010490", "repository": "USAP-DC", "title": "NSFGEO-NERC Collaborative Research: Effects of a Changing Climate on the Habitat Utilization, Foraging Ecology and Distribution of Crabeater Seals"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.0, "title": "Crabeater seal tracking data 2022-2023", "uid": "601861", "west": -120.0}, {"awards": "2015878 O\u0027\u0027Brien, Kristin", "bounds_geometry": null, "date_created": "Mon, 13 Jan 2025 00:00:00 GMT", "description": "The data were generated from a survey deployed prior to the workshop on the value and scope of an Antarctic Biorepository that collected information from 50 PIs and 31 collection managers, representing 56 institutions across the U.S.", "east": null, "geometry": null, "keywords": "Antarctica; Cryosphere", "locations": "Antarctica", "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "O\u0027Brien, Kristin", "project_titles": "Collaborative Research: A Workshop for Evaluating the Value and Scope of a Biological Repository of Antarctic Specimens", "projects": [{"proj_uid": "p0010491", "repository": "USAP-DC", "title": "Collaborative Research: A Workshop for Evaluating the Value and Scope of a Biological Repository of Antarctic Specimens"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Survey of US Antarctic biological collections", "uid": "601862", "west": null}, {"awards": "1744961 Olesik, John", "bounds_geometry": ["POLYGON((161.71158 -77.75758,161.7127687 -77.75758,161.7139574 -77.75758,161.7151461 -77.75758,161.7163348 -77.75758,161.7175235 -77.75758,161.7187122 -77.75758,161.7199009 -77.75758,161.7210896 -77.75758,161.7222783 -77.75758,161.723467 -77.75758,161.723467 -77.75784200000001,161.723467 -77.758104,161.723467 -77.758366,161.723467 -77.758628,161.723467 -77.75889000000001,161.723467 -77.759152,161.723467 -77.75941399999999,161.723467 -77.759676,161.723467 -77.759938,161.723467 -77.7602,161.7222783 -77.7602,161.7210896 -77.7602,161.7199009 -77.7602,161.7187122 -77.7602,161.7175235 -77.7602,161.7163348 -77.7602,161.7151461 -77.7602,161.7139574 -77.7602,161.7127687 -77.7602,161.71158 -77.7602,161.71158 -77.759938,161.71158 -77.759676,161.71158 -77.75941399999999,161.71158 -77.759152,161.71158 -77.75889000000001,161.71158 -77.758628,161.71158 -77.758366,161.71158 -77.758104,161.71158 -77.75784200000001,161.71158 -77.75758))"], "date_created": "Tue, 07 Jan 2025 00:00:00 GMT", "description": "This data set includes measurements of the amounts of each detectable element in thousands of individual nanoparticles and fine microparticles in 28 Taylor Glacier samples from 9076 to 44374 yr BP using a single particle Inductively Coupled Plasma-Time of Flight Mass Spectrometer. Particle number concentrations measured by spICP-TOFMS and Coulter Counter are also included.", "east": 161.723467, "geometry": ["POINT(161.7175235 -77.75889000000001)"], "keywords": "Antarctica; Cryosphere; Particle Size; Taylor Glacier", "locations": "Antarctica; Taylor Glacier", "north": -77.75758, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Olesik, John; Gabrielli, Paolo; Kutuzov, Stanislav; Lomax-Vogt, Madeleine; Carter, Lucas; Sullivan, Ryan; Lowry, Greg", "project_titles": "Atmospheric Mineral Nanoparticles in Antarctic Ice during the last Climatic Cycle", "projects": [{"proj_uid": "p0010492", "repository": "USAP-DC", "title": "Atmospheric Mineral Nanoparticles in Antarctic Ice during the last Climatic Cycle"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.7602, "title": "Elemental composition of individual nanoparticles and fine particles in 28 Taylor Glacier ice core samples 9000 to 44000 yrs BP", "uid": "601879", "west": 161.71158}, {"awards": "1745006 Brook, Edward J.; 2019719 Brook, Edward", "bounds_geometry": ["POINT(159.356125 -76.732376)"], "date_created": "Mon, 06 Jan 2025 00:00:00 GMT", "description": "This dataset contains snapshots of carbon dioxide and methane concentrations, total air content, stable isotope measurements of carbon dioxide, as well as measurements of molecular oxygen and nitrogen and their stable isotopic signatures. Samples come from the ALHIC1901 ice core from the Allan Hills, Antarctica. Where possible, new ages have been assigned to previous measurements from the ALHIC1503 ice core. For samples containing excess CO2 from a secondary source, estimated atmospheric CO2 ranges are included. ", "east": 159.356125, "geometry": ["POINT(159.356125 -76.732376)"], "keywords": "Allan Hills; Antarctica; Blue Ice; Carbon Dioxide; Cryosphere; Methane", "locations": "Allan Hills; Allan Hills; Antarctica", "north": -76.732376, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Marks Peterson, Julia; Brook, Edward; Kalk, Michael; Hishamunda, Valens; Shackleton, Sarah; 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": "COLDEX", "south": -76.732376, "title": "Snapshot record of CO2 and CH4 from the Allan Hills, Antarctica, ranging from 400,000 to 3 million years old", "uid": "601878", "west": 159.356125}, {"awards": "1745130 Moran, Amy", "bounds_geometry": null, "date_created": "Sat, 04 Jan 2025 00:00:00 GMT", "description": "Counts of Odontaster along 50-m transects at the McMurdo Intake Jetty (2019, 2020) and Cinder Cones (2022), including incidence of SSWS and staging of each visibly affected individual starfish.", "east": null, "geometry": null, "keywords": "Antarctica; Cryosphere; McMurdo; McMurdo Sound", "locations": "McMurdo; McMurdo Sound; Antarctica", "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Moran, Amy; Thurber, Andrew", "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": "Survey Metadata. 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; Antarctica; Antarctic Peninsula", "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": null, "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": null, "geometry": null, "keywords": "Antarctica; Belgica Antarctica; Cryosphere", "locations": "Antarctica", "north": null, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Sousa Lima, Cleverson; Michel, Andrew; Hayward, Scott; Colinet, Herve", "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": null, "title": "Cross-tolerance in Belgica antarctica near Palmer Peninsula", "uid": "601872", "west": null}, {"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": "Antarctic Peninsula; Antarctica", "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": "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": "Antarctic Peninsula; Antarctica; 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": null, "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": null, "geometry": null, "keywords": "Antarctica; Cryosphere", "locations": "Antarctica", "north": null, "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": null, "title": "Belgica antarctica collection sites - Summer 2023/2024 field season", "uid": "601875", "west": null}, {"awards": "1850988 Teets, Nicholas", "bounds_geometry": null, "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": null, "geometry": null, "keywords": "Antarctica; Belgica Antarctica; Cryosphere", "locations": "Antarctica", "north": null, "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": null, "title": "Stress tolerance in Belgica antarctica and Eretmoptera murphyi", "uid": "601874", "west": null}, {"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": "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": "McMurdo Sound; Antarctica", "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": "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": "2019719 Brook, Edward; 1745007 Mayewski, Paul; 0838843 Kurbatov, Andrei; 1443306 Mayewski, Paul; 1744993 Higgins, John; 1744832 Severinghaus, Jeffrey; 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": "Antarctica; Allan Hills", "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": "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"}, {"proj_uid": "p0010321", "repository": "USAP-DC", "title": "Center for Oldest Ice Exploration"}], "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": "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": "Antarctica; Antarctic Peninsula", "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": "2019719 Brook, Edward; 2149518 Fudge, Tyler", "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": "Antarctica; Allan Hills", "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": "AWI_PS129_01 TBD; 2148517 Hancock, Cathrine", "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": "Antarctica; Weddell Sea", "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": ["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": "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": "1443336 Osterberg, Erich; 1443105 Steig, Eric; 1141839 Steig, Eric; 1443663 Cole-Dai, Jihong; 1443397 Kreutz, Karl", "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": "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": -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": "Antarctica; 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": "2022-2023 Palmer Station terrestrial carbon fluxes - field warming experiment", "uid": "601853", "west": -64.0898264}, {"awards": "1443105 Steig, Eric; 1443663 Cole-Dai, Jihong; 1443397 Kreutz, Karl; 1443336 Osterberg, Erich; 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": "p0010060", "repository": "USAP-DC", "title": "Collaborative Research: A 1500m Ice Core from 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": "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": -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": "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, 30 Oct 2024 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; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology", "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": "601849", "west": -180.0}, {"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": "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": "Antarctica; Taylor Valley", "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": "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": "Law Dome; Antarctica", "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": "Totten Glacier; Antarctica; Antarctica", "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; Antarctica; Ross Sea", "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; Dry Valleys; Lake Fryxell; 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": "Antarctica; McMurdo Sound", "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; 0838892 Burns, Jennifer; 0838937 Costa, Daniel", "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": "p0010369", "repository": "USAP-DC", "title": "Collaborative Research: Physiological and Genetic Correlates of Reproductive Success in High- versus Low-Quality Weddell seals"}, {"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": -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": "9615282 Siddoway, Christine; 0944600 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": "Antarctica; Marie Byrd Land; Amundsen Sea; Amundsen Sea", "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; Antarctica; Thwaites Glacier", "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": "Antarctica; Allan Hills", "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": "Allan Hills; Antarctica; 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": "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 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": "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 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": "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": "Concentration and flux of ice core dust from ALHIC1903 drilled at the Allan Hills Blue Ice Area", "uid": "601825", "west": 159.31}, {"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": "Antarctica; Wilkes Land", "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": "1744832 Severinghaus, Jeffrey; 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": "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": "Antarctica; Allan Hills", "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": "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": "Antarctica; Wilkes Land", "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((-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": "Antarctica; Antarctic Peninsula", "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": "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": 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": "Antarctica; Talos Dome", "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": "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": "Amundsen Sea; Antarctica", "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": "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": "2026045 Schofield, Oscar; 1440435 Ducklow, Hugh; 1543383 Postlethwait, John; 0636696 DeVries, Arthur; 1142158 Cheng, Chi-Hing", "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 Organisms and Ecosystems; Antarctic Integrated System Science; Antarctic Integrated System Science", "persons": "Corso, Andrew; Desvignes, Thomas; McDowell, Jan; Cheng, Chi-Hing; Biesack, Ellen; Steinberg, Deborah; Hilton, Eric", "project_titles": "Antarctic Fish and MicroRNA Control of Development and Physiology; 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; Evolution of hemoglobin genes in notothenioid fishes; LTER Palmer, Antarctica (PAL): Land-Shelf-Ocean Connectivity, Ecosystem Resilience and Transformation in a Sea-Ice Influenced Pelagic Ecosystem", "projects": [{"proj_uid": "p0010417", "repository": "USAP-DC", "title": "Evolution of hemoglobin genes in 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"}, {"proj_uid": "p0000560", "repository": "USAP-DC", "title": "Environmental, Organismal and Evolutionary Physiology of Freeze Avoidance in Antarctic Notothenioid Fishes"}, {"proj_uid": "p0010085", "repository": "USAP-DC", "title": "Antarctic Fish and MicroRNA Control of Development and Physiology"}], "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 Glacier; Antarctica; Taylor Valley", "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": "p0010192", "repository": "USAP-DC", "title": "Collaborative Research: Reconstructing East Antarctica\u2019s Past Response to Climate using Subglacial Precipitates"}, {"proj_uid": "p0010243", "repository": "USAP-DC", "title": "U-Series Comminution Age Constraints on Taylor Valley Erosion"}], "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; Southern Ocean; Antarctica; Sabrina Coast; 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; Taylor Glacier; Antarctica", "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": "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": "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": "Antarctica; Mount Overlord", "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": "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": "Southern Ocean; Antarctica", "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": null, "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": null, "projects": null, "repositories": null, "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": "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 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": "1443534 Bell, Robin; 1444690 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": "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 Astrophysics and Geospace Sciences; Antarctic Instrumentation and Support", "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": "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": "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": "Ross Ice Shelf; Antarctica", "north": -77.0, "nsf_funding_programs": "Antarctic Astrophysics and Geospace Sciences; Antarctic Integrated System Science; Antarctic Instrumentation and Support", "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": "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": "Deep ICE (DICE) Radar Dataset from Ross Ice Shelf (ROSETTA-Ice)", "uid": "601789", "west": 161.0}, {"awards": "0958658 Bell, Robin; 1444690 Bell, Robin; 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, 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 Instrumentation and Support; Antarctic Astrophysics and Geospace Sciences; Antarctic Integrated System Science", "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": "1744550 Amsler, Charles; 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": "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": "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 (2006-2007 \u0026 2010-2011)", "uid": "601779", "west": -97.5}, {"awards": "2042495 Blackburn, Terrence", "bounds_geometry": ["POINT(157 -76)"], "date_created": "Tue, 30 Apr 2024 00:00:00 GMT", "description": "This dataset represents geochemical analyses on sample PRR-50504, a chemical precipitate deposited beneath the East Antarctic Ice Sheet and collected at Elephant Moraine. The data include U-series geochronological data, carbon and oxygen stable isotope data, Sr isotopic data, and laser ablation elemental analyses. 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": 157.0, "geometry": ["POINT(157 -76)"], "keywords": "Antarctica; Carbon; Carbon Isotopes; Cryosphere; East Antarctica; Elephant Moraine; Geochronology; Isotope Data; Opal; Oxygen Isotope; Sr; Subglacial; U", "locations": "Antarctica; Elephant Moraine; East Antarctica", "north": -76.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Piccione, Gavin", "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": -76.0, "title": "U-series Geochronology, Isotope, and Elemental Geochemistry of a Subglacial Precipitate that Formed Across Termination III", "uid": "601781", "west": 157.0}, {"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": "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": "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": "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": "1745080 Gillikin, David; 1745057 Walker, Sally; 0739512 Walker, Sally; 1745064 Perez-Huerta, Alberto", "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": "Antarctica; Explorers Cove", "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": "p0000203", "repository": "USAP-DC", "title": "Collaborative Research: Linking Modern Benthic Communities and Taphonomic Processes to the Stratigraphic Record of Antarctic Cores"}, {"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": 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((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": "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": "1443585 Polito, Michael; 1443386 Emslie, Steven; 1443424 McMahon, Kelton; 1826712 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; Emslie, Steven; McCarthy, Matthew; Patterson, William; McMahon, Kelton", "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": "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": "Siple Dome; Antarctica", "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": "1643798 Emry, Erica; 1643873 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": "Mon, 16 Oct 2023 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. These results were presented by Emry and Hansen at the 2022 Fall Meeting of the American Geophysical Union.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Ambient Seismic Noise; Antarctica; Full-Waveform Inversion; Seismic Tomography; Shear Wave Velocity; Solid Earth", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Earth Sciences", "persons": "Emry, Erica", "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": "601744", "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": "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": "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": 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. 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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. 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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": "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": "Palmer Station; 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": "Feeding Experiment - Krill Lipid Classes", "uid": "601707", "west": -64.0}, {"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": "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": "Antarctica; Mount Murphy", "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": "Antarctica; Dry Valleys", "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": "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": "Antarctica; Palmer Station", "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": "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": "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": "Amphipod counts from 2020 ocean acidification experiment", "uid": "601702", "west": -64.06}, {"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": "Antarctica; Allan Hills", "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": "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": -76.73, "title": "Allan Hills 2022-23 Shallow Ice Core Field Report", "uid": "601696", "west": 159.17}, {"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; Styx Glacier; Antarctica; Greenland", "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": "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": "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": "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": "Antarctica; Ross Sea", "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": "Antarctica; Antarctic Peninsula", "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": "Ross Sea; Antarctica", "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": "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": "Antarctica; West Antarctic Ice Sheet", "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": "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": "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": "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": "Antarctica; Thwaites Glacier", "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": "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": "p0000243", "repository": "USAP-DC", "title": "Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica (AGASEA)"}, {"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": -81.0, "title": "AGASEA 4.7 ka Englacial Isochron over the Thwaites Glacier Catchment", "uid": "601673", "west": -136.0}, {"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": "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 "}], "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": "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": "Antarctica; South Pole", "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": "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": "Antarctica; West Antarctic Ice Sheet; Mercer Subglacial Lake; 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": "Antarctica; Mercer Subglacial Lake; West Antarctic Ice Sheet; 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": "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; Antarctica; Thwaites Glacier", "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 -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": "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": "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 (2008-2009 \u0026 2018-2019)", "uid": "601656", "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": "Antarctic Peninsula; Antarctica", "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": "Antarctica; Weddell Sea", "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": "Antarctic Peninsula; Antarctica; Antarctica", "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": "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": "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": "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": "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": "Flow Cytometry Samples from Station E (Palmer Station, Antarctica) and Associated Incubation Experiments", "uid": "601647", "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": "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": "Antarctica; Antarctic; Antarctic Coastal Polynyas", "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": "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": "Antarctica; Allan Hills", "north": -76.73243, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Severinghaus, Jeffrey P.", "project_titles": "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 "}], "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": "1744602 Iken, Katrin; 1744550 Amsler, Charles; 1744584 Klein, Andrew; 1744570 Galloway, Aaron", "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; 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": "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": "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": "Ross Island; Antarctica", "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": "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; Amundsen Sea; Antarctica; 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": "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": "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": "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; Hatherton Glacier; Antarctica; Transantarctic Mountains", "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": "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": "1245659 Petrenko, Vasilii; 1245821 Brook, Edward J.; 1246148 Severinghaus, Jeffrey", "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": "Taylor Glacier; Antarctica", "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 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": "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": "Antarctica; Law Dome", "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": "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": "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": 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": "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": "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": "East Antarctica; 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": "Antarctica; Marguerite Bay", "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": "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": "Antarctica; Weddell Sea", "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": "Weddell Sea; Antarctica", "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": "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": "Southern Ocean; Antarctica", "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": "Antarctica; Dotson Ice Shelf", "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": "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": "Antarctica; McMurdo Sound", "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": "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": "Thwaites Glacier; Antarctica; Thwaites Glacier; Amundsen Sea; 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": "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": "Thwaites Glacier; Antarctica; Pine Island Bay; Amundsen Sea", "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; Antarctica; Thwaites Glacier; Pine Island Bay; Thwaites Glacier", "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": "Pine Island Bay; Antarctica; Thwaites Glacier; Amundsen Sea", "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": "South Pole; Antarctica", "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": "Pine Island Bay; Amundsen Sea; Thwaites Glacier; Antarctica", "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": "Pine Island Bay; Antarctica; 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": "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": "Antarctica; Antarctic Peninsula", "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": "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((-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": "Histopathology images of X-cell xenomas in Trematomus scotti and in Nototheniops larseni.", "east": -62.3, "geometry": ["POINT(-62.7 -64.45)"], "keywords": "Alveolata; 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": "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; 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; Fontenele, Rafaela S. ; Kraberger, Simona ; 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": "Metagenomic analysis of apparently healthy and tumor samples using Kaiju software ", "uid": "601537", "west": -63.1}, {"awards": "1745036 Marchetti, Adrian; 1744760 Hopkinson, Brian", "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": "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": "Antarctica; Whillans Ice Stream", "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; Antarctica; South Pole", "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": "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": "Antarctic Peninsula; Antarctica", "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": "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": "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": "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": "Thwaites Glacier; Antarctica", "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": "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; 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Data were collected with the Autonomous phase-sensitive Radio Echo Sounder (ApRES) (Nicholls et al., 2015). 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", "east": -62.3, "geometry": ["POINT(-62.7 -64.45)"], "keywords": "Alveolata; Antarctica; Antarctic Peninsula; Biota; Notoxcellia Coronata; Notoxcellia Picta; Oceans; Perkinsozoa; Xcellidae", "locations": "Antarctica; Antarctic Peninsula", "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": "Antarctica; Antarctica; Amundsen Sea; Thwaites Glacier; 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": "Antarctica; Mercer Subglacial Lake", "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": "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": "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": "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": "1744794 Jenouvrier, Stephanie; 2037561 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": "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": "Dry Valleys; Don Juan Pond; 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": "1433140 Domack, Eugene; 0732625 Leventer, Amy", "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": "Antarctic Peninsula; Antarctica", "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": "1745055 Stearns, Leigh; 1246353 Anderson, John; 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": "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": "1745055 Stearns, Leigh; 1246353 Anderson, John; 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": "Antarctica; Ross Sea; Pennell Trough", "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; Amundsen Sea; Antarctica", "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": "1917149 Grapenthin, Ronni; 1643952 Grapenthin, Ronni; 2039432 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": "Antarctica; Ross Island; Ross Island; 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((-57.7 -64.2,-46.44 -64.2,-35.18 -64.2,-23.92 -64.2,-12.66 -64.2,-1.4 -64.2,9.86 -64.2,21.12 -64.2,32.38 -64.2,43.64 -64.2,54.9 -64.2,54.9 -65.99,54.9 -67.78,54.9 -69.57,54.9 -71.36,54.9 -73.15,54.9 -74.94,54.9 -76.73,54.9 -78.52,54.9 -80.31,54.9 -82.1,43.64 -82.1,32.38 -82.1,21.12 -82.1,9.86 -82.1,-1.4 -82.1,-12.66 -82.1,-23.92 -82.1,-35.18 -82.1,-46.44 -82.1,-57.7 -82.1,-57.7 -80.31,-57.7 -78.52,-57.7 -76.73,-57.7 -74.94,-57.7 -73.15,-57.7 -71.36,-57.7 -69.57,-57.7 -67.78,-57.7 -65.99,-57.7 -64.2))"], "date_created": "Fri, 16 Jul 2021 00:00:00 GMT", "description": "This dataset includes:\r\n1) rBC concentration and flux for 6 Antarctic ice core sites (JRI_2008, JRI_D98, NUS08_7, NUS07_7, B53, and B40). \r\n2) FLEXPART backward-model emission sensitivities for 4 Antarctic ice core sites (JRI, B40, B53, NUS07_7). \r\n3) FLEXPART forward-model deposition for simulated biomass burning emissions from New Zealand.\r\n4) Tie points to constrain flow model used to develop JRI_2008 chronology.", "east": 54.9, "geometry": ["POINT(-1.4 -73.15)"], "keywords": "Antarctica; Antarctic Peninsula; Biomass Burning; Black Carbon; Dronning Maud Land; East Antarctic Plateau; Ice Core", "locations": "Antarctica; East Antarctic Plateau; Dronning Maud Land; Antarctic Peninsula", "north": -64.2, "nsf_funding_programs": null, "persons": "McConnell, Joseph; Chellman, Nathan", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -82.1, "title": "Common-era black carbon deposition and atmospheric modeling for 6 Antarctic ice cores", "uid": "601464", "west": -57.7}, {"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": "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 Island; Ross Sea", "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": "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(75.4045 -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(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": "Prydz Bay; Antarctica", "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": "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": "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": "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": "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; Larsen C Ice Shelf; Antarctica", "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": "0439200 Dugger, Katie; 0439759 Ballard, Grant; 0944141 Ballard, Grant; 0944411 Ainley, David; 0440643 Ainley, David; 1543541 Ainley, David; 1543498 Ballard, Grant; 1543459 Dugger, Katie; 1935901 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": "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": "p0010179", "repository": "USAP-DC", "title": "Population Growth at the Southern Extreme: Effects of Early Life Conditions on Adelie penguin Individuals and Colonies"}, {"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": "1543498 Ballard, Grant; 0944141 Ballard, Grant; 1543459 Dugger, Katie; 0439759 Ballard, Grant; 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": "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": "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 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": "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": "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": "Antarctica; South Pole", "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": "Titan Dome; East Antarctica; Antarctica", "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": "McMurdo Sound; Antarctica", "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": "1443144 Steig, Eric; 1443448 Schaefer, Joerg", "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; Antarctica; South Pole", "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": "Antarctica; South Pole", "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": "Terra Nova Bay; Antarctica; Ross Sea; Amundsen Sea", "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": "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": "West Antarctica; 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": "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": "Shackleton Glacier; Antarctica; Transantarctic Mountains", "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": "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": "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": "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 underwater images from around a single mooring site in McMurdo Sound, Antarctica (2017-2019)", "uid": "601417", "west": 166.6645}, {"awards": "1341663 O\u0027Brien, Kristin; 1341602 Crockett, Elizabeth", "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": 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": "South Shetland Islands; Antarctica", "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": "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; 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": "Antarctica; Antarctic Peninsula", "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": "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 Earth Sciences; Antarctic Glaciology; 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": "p0000102", "repository": "USAP-DC", "title": "Center for Remote Sensing of Ice Sheets (CReSIS)"}, {"proj_uid": "p0000719", "repository": "USAP-DC", "title": "IPY Research: Investigating the Cryospheric Evolution of the Central Antarctic Plate (ICECAP)"}, {"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": "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": "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": "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": "Antarctica; Antarctic Peninsula", "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": "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": "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": "Antarctica; 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": -87.0, "title": "2017 GPR Observations of the Whillans and Mercer Ice Streams", "uid": "601403", "west": -168.0}, {"awards": "1246148 Severinghaus, Jeffrey; 1245659 Petrenko, Vasilii; 1245821 Brook, Edward J.", "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": "Antarctica; Taylor Glacier; 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": "1543267 Brook, Edward J.; 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": "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; Greenland Ice Cap; James Ross Island; Bruce Plateau; WAIS Divide; South Pole; Siple Dome; Law Dome; Antarctica", "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; Antarctic Peninsula; Wilkins Ice Shelf; Antarctica", "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": "1443397 Kreutz, Karl; 1443472 Brook, Edward J.; 1643394 Buizert, Christo; 1443470 Aydin, Murat; 1142517 Aydin, Murat; 1804154 Sowers, Todd; 1443464 Sowers, Todd; 1141839 Steig, Eric; 1443105 Steig, Eric; 1443710 Severinghaus, Jeffrey", "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": "Antarctica; Antarctica; South Pole", "north": -89.99, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology; Antarctic Ocean and Atmospheric Sciences; Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology; 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": "p0010089", "repository": "USAP-DC", "title": "Carbonyl Sulfide, Methyl Chloride, and Methyl Bromide Measurements in the New Intermediate-depth South Pole Ice Core"}, {"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": "SP19 Gas Chronology", "uid": "601380", "west": 99.16}, {"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": "0733025 Blankenship, Donald; 1543452 Blankenship, Donald; 0636724 Blankenship, Donald; 1443690 Young, Duncan", "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": "Antarctica; East 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": "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": "p0000254", "repository": "USAP-DC", "title": "East Antarctic Grounding Line Experiment (EAGLE)"}, {"proj_uid": "p0010115", "repository": "USAP-DC", "title": "Collaborative Research: Southern Plateau Ice-sheet Characterization and Evolution of the Central Antarctic Plate (SPICECAP)"}, {"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": "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": "1443585 Polito, Michael; 1443386 Emslie, Steven; 1443424 McMahon, Kelton; 1826712 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": "Antarctic Peninsula; Antarctica; Weddell Sea", "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": "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": "0125602 Padman, Laurence; 1443677 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; Antarctic Ocean and Atmospheric Sciences; Arctic System Science", "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": "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": "p0000032", "repository": "USAP-DC", "title": "Methyl chloride and methyl bromide in Antarctic ice cores"}, {"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": null, "title": "Ice Core Air Carbonyl Sulfide Measurements - SPRESSO Ice Core", "uid": "601357", "west": null}, {"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": "South Pole; Antarctica", "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": "Antarctica; Epica Dome C", "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": ["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": "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": "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": "Larsen Ice Shelf; Antarctica; Antarctic Peninsula", "north": -61.0, "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": "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": "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": "Antarctic; Amundsen Sea; Southern Ocean; Pine Island Glacier; Pine Island Bay; Antarctica", "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": "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. Palmer; Southern Ocean", "locations": "Antarctica; Pine Island Bay; Southern Ocean; Amundsen Sea", "north": -66.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Thurnherr, Andreas", "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": "Calibrated Hydrographic Data acquired with a LADCP from the Amundsen Sea acquired during the Nathaniel B. Palmer expedition NBP0901", "uid": "601349", "west": -130.0}, {"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; Larsen Ice Shelf; Antarctic Peninsula", "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": "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": -65.0, "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": "0732651 Gordon, Arnold; 0732467 Domack, Eugene", "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": "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 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; Ross Sea; Southern Ocean", "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": "0338157 Smith, Walker; 0338097 DiTullio, Giacomo", "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. Palmer; Southern Ocean; Water Measurements", "locations": "Southern Ocean; Antarctica; Ross Sea; Ross Sea; Antarctica", "north": -76.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences; Antarctic Ocean and Atmospheric Sciences", "persons": "DiTullio, Giacomo; Smith, Walker", "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": -78.0, "title": "Processed Fluid Chemistry Data from the Ross Sea acquired during the Nathaniel B. Palmer expedition NBP0601", "uid": "601340", "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. Palmer; Salinity; Southern Ocean; Temperature; Turbulance; Weddell Sea", "locations": "Antarctica; Antarctica; Southern Ocean; Maud Rise; Weddell Sea", "north": -62.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "McPhee, Miles G.", "project_titles": "Collaborative Research: The Maud Rise Nonlinear Equation of State Study (MaudNESS)", "projects": [{"proj_uid": "p0000579", "repository": "USAP-DC", "title": "Collaborative Research: The Maud Rise Nonlinear Equation of State Study (MaudNESS)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -66.2, "title": "Processed ADCP Sonar and CTD Data from the Maud Rise acquired during the Nathaniel B. Palmer expedition NBP0506", "uid": "601342", "west": -2.0}, {"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": "Antarctica; Southern Ocean; Cape Adare; Ross Sea; Ross Sea; Cape Adare; 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": "p0000838", "repository": "USAP-DC", "title": "Cape Adare Long-term Mooring (CALM)"}, {"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": -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": "Larsen Ice Shelf; Antarctic Peninsula; Antarctica", "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 CTD Data from the Larsen Ice Shelf in Antarctica acquired during the Nathaniel B. Palmer expedition NBP1001", "uid": "601345", "west": -68.0}, {"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": "Larsen Ice Shelf; Antarctica", "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": "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": "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": -65.0, "title": "Radioisotope data (C-14 and Pb-210) from bulk sediments, Larsen A Ice Shelf", "uid": "601336", "west": -61.0}, {"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": "Antarctica; South Pole", "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": "1744570 Galloway, Aaron; 1744584 Klein, Andrew; 1744550 Amsler, Charles; 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": "South Pole; Antarctica", "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": 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": 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": "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": "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. 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Palmer expedition NBP1402 ", "uid": "601310", "west": 118.0}, {"awards": "0732711 Smith, Craig", "bounds_geometry": ["POLYGON((-69 -61,-67.6 -61,-66.2 -61,-64.8 -61,-63.4 -61,-62 -61,-60.6 -61,-59.2 -61,-57.8 -61,-56.4 -61,-55 -61,-55 -61.68,-55 -62.36,-55 -63.04,-55 -63.72,-55 -64.4,-55 -65.08,-55 -65.76,-55 -66.44,-55 -67.12,-55 -67.8,-56.4 -67.8,-57.8 -67.8,-59.2 -67.8,-60.6 -67.8,-62 -67.8,-63.4 -67.8,-64.8 -67.8,-66.2 -67.8,-67.6 -67.8,-69 -67.8,-69 -67.12,-69 -66.44,-69 -65.76,-69 -65.08,-69 -64.4,-69 -63.72,-69 -63.04,-69 -62.36,-69 -61.68,-69 -61))"], "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. 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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": -55.0, "geometry": ["POINT(-62 -64.4)"], "keywords": "Antarctica; Antarctic Peninsula; Biota; Box Corer; LARISSA; Larsen Ice Shelf; Macrofauna; Megafauna; NBP1001; Oceans; R/v Nathaniel B. 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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. 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Gould expedition LMG0802", "uid": "601303", "west": -72.0}, {"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. The data are on Jpeg format", "east": -60.5, "geometry": ["POINT(-62.75 -63.75)"], "keywords": "Antarctica; Antarctic Peninsula; Benthic Images; Benthos; Biota; LMG1708; Oceans; Photo; Photo/video; Photo/Video; R/v Laurence M. Gould; Ship; Yoyo Camera", "locations": "Antarctica; Antarctic Peninsula", "north": -62.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Girton, James", "project_titles": "Collaborative Research: Pathways of Circumpolar Deep Water to West Antarctica from Profiling Float and Satellite Measurements", "projects": [{"proj_uid": "p0010074", "repository": "USAP-DC", "title": "Collaborative Research: Pathways of Circumpolar Deep Water to West Antarctica from Profiling Float and Satellite Measurements"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.5, "title": "Bottom Photographs from the Antarctic Peninsula acquired during R/V Laurence M. Gould expedition LMG1703", "uid": "601302", "west": -65.0}, {"awards": "9978236 Bell, Robin; 9911617 Blankenship, Donald", "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": "Bedrock Elevation Data acquired during the SOAR Twin Otter expedition SOAR-LVS (2000)\r\nThis data set was during SOAR Twin Otter expedition SOAR-LVS conducted in 2000 (Chief Scientist: Dr. Robin Bell; Investigator(s): Dr. Michael Studinger). These data files are of ASCII format and include Bedrock 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 Laser Altimeters; Airborne Laser Altimetry; Airborne Radar; Airplane; Antarctica; Bed Elevation; Bedrock Elevation; Digital Elevation Model; East Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Sheet; Lake Vostok; Radar; Radar Echo Sounder; SOAR", "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": "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 bed elevation data", "uid": "601299", "west": 101.5}, {"awards": "9978236 Bell, Robin; 9911617 Blankenship, Donald", "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": "Antarctica; Lake Vostok; East 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": "9978236 Bell, Robin; 9911617 Blankenship, Donald", "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": "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": "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 magnetic anomaly data", "uid": "601296", "west": 101.5}, {"awards": "9978236 Bell, Robin; 9911617 Blankenship, Donald", "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": "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 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": "Surface Elevation Data acquired during the SOAR Twin Otter expedition SOAR-LVS (2000)\r\nThis data set was during SOAR Twin Otter expedition SOAR-LVS conducted in 2000 (Chief Scientist: Dr. Robin Bell; Investigator(s): Dr. Michael Studinger). 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; Antarctica; East 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": "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 surface elevation data", "uid": "601298", "west": 101.5}, {"awards": "9978236 Bell, Robin; 9911617 Blankenship, Donald", "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. 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 Radar; Airplane; Antarctica; East Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Lake Vostok; Navigation; Radar; SOAR; Subglacial Lakes", "locations": "Antarctica; Lake Vostok; East 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": "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 airborne radar data", "uid": "601300", "west": 101.5}, {"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; 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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. Norwegian data sources provided by Dr. Stein Tronstad. These data files are of Text File 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", "locations": "Antarctica; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Tronstad, Stein; 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": "Norwegian Processed ship-based Gravimeter data from the Antarctica assembled as part of the ADGRAV Data Compilation (1990)", "uid": "601279", "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. 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. ", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "ADGRAV; Antarctica; Geology/Geophysics - Other; Gravimeter; Gravity; Marine Geoscience", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Biancale, Richard; 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": "CNES processed Gravimeter Data from the Antarctica (Continent) assembled as part of the ADGRAV Data Compilation (1990)", "uid": "601278", "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. AWI data sources provided by Dr. Wilfried Jokat. These data files are of Text File 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; R/v Polarstern; Weddell Sea", "locations": "Antarctica; Weddell Sea; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Bell, Robin; Jokat, Wilfred", "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": "AWI processed ship-based Gravimeter Data from the Antarctica assembled as part of the ADGRAV Data Compilation (1990)", "uid": "601277", "west": -180.0}, {"awards": "1142158 Cheng, Chi-Hing; 0231006 DeVries, Arthur", "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": "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": "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": "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; Southern Hemisphere; Antarctica", "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": "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": "Antarctica; Antarctic Peninsula", "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": "Ross Sea; Antarctica; Ross Sea; Ross Ice Shelf", "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": "1644027 Wallace, Paul; 1644013 Gaetani, Glenn; 1644020 Sims, Kenneth W.", "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": "Turtle Rock; Antarctica; Hut Point Peninsula; Turks Head; Ross Island; Mt. Morning; Mt. Bird; Mt. Terror", "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; Siegfried, Matt; Tinto, Kirsty", "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": "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": "Sea Surface; Antarctica", "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": "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": "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": "CATS2008: Circum-Antarctic Tidal Simulation version 2008", "uid": "601235", "west": -180.0}, {"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": "1443424 McMahon, Kelton; 1443585 Polito, Michael; 1443386 Emslie, Steven; 1826712 McMahon, Kelton", "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; Antarctica; Antarctic Peninsula; Southern Ocean", "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 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": "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": "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": "Antarctica; Ross Sea; Victoria Land Basin", "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": "Transantarctic Mountains; Ross Ice Sheet; Antarctica; Liv Glacier", "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": "Southern Ocean; Antarctica; 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": "Antarctic; Antarctica; West Antarctic Ice Sheet", "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": "1141839 Steig, Eric; 1142517 Aydin, Murat; 1142646 Twickler, Mark", "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": "West Antarctic Ice Sheet; Antarctica", "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": "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": "Pine Island Glacier; Antarctica", "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; Antarctica; Southern Ocean", "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": "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; Siegfried, Matt; Scheidt, Celine", "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": "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": "1826712 McMahon, Kelton; 1443585 Polito, Michael; 1443386 Emslie, Steven; 1443424 McMahon, Kelton", "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": "Antarctica; Southern Ocean; Antarctic Peninsula", "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": "Southern Ocean; Antarctica; 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": "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": "Antarctica; South Pole", "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": "Ross Sea; Southern Ocean; Antarctica", "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": "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": "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": "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": "1246148 Severinghaus, Jeffrey; 1245821 Brook, Edward J.; 1245659 Petrenko, Vasilii", "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": "Antarctica; South Pole", "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": "Transantarctic Mountains; Antarctica", "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": "Southern Ocean; Antarctica", "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": "South Pole; Antarctica", "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": "Ross Sea; Antarctica", "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": "Antarctica; Ross Sea", "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": "Southern Ocean; Ross Sea; Antarctica", "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": "1443552 Paul Winberry, J.; 1443356 Conway, Howard", "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": "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": "Southern Ocean; Antarctica; 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": "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": "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": "West Antarctic Ice Sheet; Antarctica; Antarctic; WAIS Divide", "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": "Southern Ocean; Antarctica", "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": "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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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; Antarctic; Southern Ocean", "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": "Antarctica; Southern Ocean", "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; Sabrina Coast; 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 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; Antarctica; Southern Ocean", "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; Southern Ocean; Antarctica", "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": "Antarctica; McMurdo Sound; 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": "Southern Ocean; Antarctica", "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": "1341476 Moran, Amy; 1341485 Woods, H. Arthur", "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; Southern Ocean; McMurdo Sound", "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": "Ross Sea; Antarctica; Southern Ocean; McMurdo Sound", "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": "Kerguelen Island; Antarctica; Southern Ocean", "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": "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": "Antarctica; Ross Sea; Southern Ocean", "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": "Southern Ocean; Antarctica", "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": "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": "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": "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": "Antarctica; Southern Ocean", "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": "Seymour Island; Antarctica", "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": "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": "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": "Antarctica; West Antarctica; Amundsen Sea; 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": "1246148 Severinghaus, Jeffrey; 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, 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": "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": "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": "James Ross Basin; Antarctica", "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": "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": "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": "Antarctic Peninsula; Larsen B Ice Shelf; Scar Inlet; Flask Glacier; Antarctica", "north": -64.75, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Integrated System Science", "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": "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": "WAIS Divide; Antarctica", "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": "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": "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": "Antarctica; Antarctic Peninsula", "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": "Antarctica; Ross Island", "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": "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": "Antarctica; Dry Valleys; McMurdo", "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": "Ross Sea; Antarctica; Roosevelt Island", "north": -79.15, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Glaciology", "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; 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 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; 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 Final CTD data", "uid": "601067", "west": 117.0}, {"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": "WAIS Divide; Antarctica", "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": "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": "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": "Antarctica; WAIS Divide", "north": -79.46, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Earth Sciences", "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": "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": "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": "Antarctica; Dronning Maud Land", "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": "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": "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": "Southern Ocean; Antarctica; Sabrina Coast; Totten Glacier", "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": "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": "Southern Ocean; Antarctica; Sabrina Coast; 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": "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; Antarctica; Sabrina Coast; Totten Glacier", "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": "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": "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": "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": "Antarctica; WAIS Divide", "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": "Antarctica; WAIS Divide", "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": "Palmer Station; Southern Ocean; Antarctica; Antarctic Peninsula", "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": "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": "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": "Southern Ocean; Antarctica; Ross Sea; McMurdo Sound", "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": "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": "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": "Taylor Glacier; Transantarctic Mountains; Antarctica", "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": "McMurdo Sound; Southern Ocean; Antarctica; Ross Sea", "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": "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": "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": "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": "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 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": "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 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": "WAIS Divide; Antarctica", "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": "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": "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 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": "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 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": "Antarctica; WAIS Divide", "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": "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": "WAIS Divide; Antarctica", "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": "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": "Antarctica; Marie Byrd Land", "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": "Antarctica; Marie Byrd Land", "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": "Antarctica; Marie Byrd Land", "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(162.3667 -77.7166)", "POINT(163.1833 -77.6767)"], "date_created": "Mon, 30 Jan 2017 00:00:00 GMT", "description": null, "east": 163.1833, "geometry": ["POINT(162.3667 -77.7166)", "POINT(163.1833 -77.6767)"], "keywords": "Antarctica; Atmosphere; Chemistry:fluid; Chemistry:Fluid; Critical Zone; Geochemistry; Noble Gas; Paleoclimate; Ross Ice Shelf; Ross Sea; Taylor Valley", "locations": "Ross Ice Shelf; Ross Sea; Antarctica; Taylor Valley", "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": "Antarctica; Ross Sea; Southern Ocean", "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": "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": "Antarctica; Anvers Island; Southern Ocean; 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": "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": "Antarctica; Ross Island; Mount Erebus", "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": "Prydz Bay; Southern Ocean", "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": "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