USAP-DC

{"dp_type": "Dataset", "free_text": "Ship"}

[{"awards": "1939139 Scherer, Reed", "bounds_geometry": null, "date_created": "Tue, 20 Feb 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; Sabrina Coast; Southern Ocean", "locations": "Amundsen Sea; Sabrina Coast; Antarctica; Southern Ocean; Amundsen Sea; Sabrina Coast", "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": "Last Interglacial Southern Ocean paleothermometry from diatom morphometrics: Analysis and application of the F. kerguelensis Valve Rectangularity Sea Surface Temperature proxy.", "uid": "601767", "west": null}, {"awards": null, "bounds_geometry": ["POLYGON((50 -84,55 -84,60 -84,65 -84,70 -84,75 -84,80 -84,85 -84,90 -84,95 -84,100 -84,100 -84.6,100 -85.2,100 -85.8,100 -86.4,100 -87,100 -87.6,100 -88.2,100 -88.8,100 -89.4,100 -90,95 -90,90 -90,85 -90,80 -90,75 -90,70 -90,65 -90,60 -90,55 -90,50 -90,50 -89.4,50 -88.8,50 -88.2,50 -87.6,50 -87,50 -86.4,50 -85.8,50 -85.2,50 -84.6,50 -84))"], "date_created": "Mon, 19 Feb 2024 00:00:00 GMT", "description": "This dataset constitutes the as-recorded echo data from the MARFA radar system. The data was recorded by a National Instruments acquisition system, simultaneously with GPS, magnetics, laser range data, outside air temperature and IMU data. The data was acquired using the Environment for Linked Serial Acquisition (ELSA).\r\n\r\nThe data is provided in two forms: \r\n\u2022 Flight based and as recorded on the aircraft in raw packets\r\n\u2022 Transect based, reorganized into transects corresponding to the survey design, and demultiplexed into text tables and flat binary files.\r\n", "east": 100.0, "geometry": ["POINT(75 -87)"], "keywords": "Antarctica; East Antarctic Plateau", "locations": "East Antarctic Plateau; Antarctica", "north": -84.0, "nsf_funding_programs": null, "persons": "Young, Duncan A.; Blankenship, Donald D.; Greenbaum, Jamin; Kerr, Megan; Buhl, Dillon; Ng, Gregory; Kempf, Scott D.; Chan, Kristian", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -90.0, "title": "COLDEX Raw MARFA Ice Penetrating Radar data", "uid": "601768", "west": 50.0}, {"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": "1745078 Brook, Edward", "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; 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; Brook, Edward; Martin, Kaden; Rosen, Julia; Lee, James; Edwards, Jon S.", "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": "1847067 Levy, Joseph", "bounds_geometry": ["POLYGON((161 -76,161.34 -76,161.68 -76,162.02 -76,162.36 -76,162.7 -76,163.04 -76,163.38 -76,163.72 -76,164.06 -76,164.4 -76,164.4 -76.2,164.4 -76.4,164.4 -76.6,164.4 -76.8,164.4 -77,164.4 -77.2,164.4 -77.4,164.4 -77.6,164.4 -77.8,164.4 -78,164.06 -78,163.72 -78,163.38 -78,163.04 -78,162.7 -78,162.36 -78,162.02 -78,161.68 -78,161.34 -78,161 -78,161 -77.8,161 -77.6,161 -77.4,161 -77.2,161 -77,161 -76.8,161 -76.6,161 -76.4,161 -76.2,161 -76))"], "date_created": "Mon, 26 Jun 2023 00:00:00 GMT", "description": "This dataset contains major ion data for surface and near-surface waters from the McMurdo Dry Valleys, determined through ion chromatography. Water types include snow and ice melt sources, streams and rivers, water track groundwater, pond water, and lake water. ", "east": 164.4, "geometry": ["POINT(162.7 -77)"], "keywords": "Antarctica; Dry Valleys", "locations": "Dry Valleys; Antarctica", "north": -76.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Levy, Joseph", "project_titles": "Linking Antarctic Cold Desert Groundwater to Thermokarst \u0026 Chemical Weathering in Partnership with the Geoscience UAV Academy", "projects": [{"proj_uid": "p0010286", "repository": "USAP-DC", "title": "Linking Antarctic Cold Desert Groundwater to Thermokarst \u0026 Chemical Weathering in Partnership with the Geoscience UAV Academy"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Surface Water Geochemistry from the McMurdo Dry Valleys", "uid": "601703", "west": 161.0}, {"awards": "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; 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": "0636724 Blankenship, Donald; 0230197 Holt, John; 1043761 Young, Duncan; 2127606 Young, Duncan A.", "bounds_geometry": ["POLYGON((-136 -74,-131.9 -74,-127.8 -74,-123.7 -74,-119.6 -74,-115.5 -74,-111.4 -74,-107.30000000000001 -74,-103.2 -74,-99.1 -74,-95 -74,-95 -74.7,-95 -75.4,-95 -76.1,-95 -76.8,-95 -77.5,-95 -78.2,-95 -78.9,-95 -79.6,-95 -80.3,-95 -81,-99.1 -81,-103.2 -81,-107.3 -81,-111.4 -81,-115.5 -81,-119.6 -81,-123.69999999999999 -81,-127.8 -81,-131.9 -81,-136 -81,-136 -80.3,-136 -79.6,-136 -78.9,-136 -78.2,-136 -77.5,-136 -76.8,-136 -76.1,-136 -75.4,-136 -74.7,-136 -74))"], "date_created": "Wed, 15 Mar 2023 00:00:00 GMT", "description": "This file contains internal radar horizon 1 (lm-MERGE-lay9-grg) for West Antarctica, collected during the SOAR/CASERTZ (1991-1996), SOAR/DVD (1999), ATRS (2001), AGASEA (2004-05) and GIMBLE (2013-2014) expeditions. Only data collected in AGASEA is contained in this specific product.\r\nThis data set is linked to PH.D thesis Muldoon, G. 2018 \"West Antarctic Ice Sheet Retreat during the Last Interglacial\"Spatial and temporal distributions of accumulation rates on the catchment of Thwaites Glacier, West Antarctica\", University of Texas at Austin\r\n https://doi.org/10.15781/T23B5WS0D\r\nThe internal radar horizon (IRH) was traced semi-automatically by Gail R. Muldoon using Haliburtons\u0027s Landmark software and picker, in a combination of 2D focused and unfocused data.\r\nDepths were calculated using a 2 way velocity in ice of 84.5 m/microsecond, and no firn correction. \r\n\r\nIsochron age is 4711 (+/- 246 ) years. \r\n\r\nFunding for this dataset as provided by NSF grants and The G. Unger Vetlesen Foundation.", "east": -95.0, "geometry": ["POINT(-115.5 -77.5)"], "keywords": "AntArchitecture; Antarctica; Ice Penetrating Radar; Isochron; layers; Radar; Radioglaciology; Thwaites Glacier", "locations": "Thwaites Glacier; Antarctica", "north": -74.0, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Earth Sciences; Antarctic Glaciology", "persons": "Muldoon, Gail R.; Young, Duncan A.; Jackson, Charles; Blankenship, Donald D.", "project_titles": "Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica (AGASEA); Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System; Geophysical Investigations of Marie Byrd Land Lithospheric Evolution (GIMBLE)", "projects": [{"proj_uid": "p0000435", "repository": "USAP-DC", "title": "Geophysical Investigations of Marie Byrd Land Lithospheric Evolution (GIMBLE)"}, {"proj_uid": "p0000243", "repository": "USAP-DC", "title": "Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica (AGASEA)"}, {"proj_uid": "p0000174", "repository": "USAP-DC", "title": "Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -81.0, "title": "AGASEA 4.7 ka Englacial Isochron over the Thwaites Glacier Catchment", "uid": "601673", "west": -136.0}, {"awards": "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": "Allan Hills; Antarctica", "north": -76.66667, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Nesbitt, Ian; Brook, Edward", "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": "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; Glaciology; Hatherton Glacier; HiCARS; ICECAP; Ice Penetrating Radar; Ice Thickness; Transantarctic Mountains", "locations": "Hatherton Glacier; Darwin Glacier; Transantarctic Mountains; Antarctica", "north": -79.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Gillespie, Mette; Blankenship, Donald D.; Young, Duncan A.; Siegert, Martin; Holt, John W.; Greenbaum, Jamin; Schroeder, Dustin", "project_titles": "IPY Research: Investigating the Cryospheric Evolution of the Central Antarctic Plate (ICECAP)", "projects": [{"proj_uid": "p0000719", "repository": "USAP-DC", "title": "IPY Research: Investigating the Cryospheric Evolution of the Central Antarctic Plate (ICECAP)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.4, "title": "ICECAP ice thickness data over the Darwin and Hatherton Glaciers, Transantarctic Mountains, Antarctica", "uid": "601605", "west": 153.0}, {"awards": "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; Ice Surface Elevation; Ice Thickness; Robb Glacier; Transantarctic Mountains", "locations": "Robb Glacier; Transantarctic Mountains; Antarctica", "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": "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": "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; Glaciology", "locations": "Dotson ice shelf; Antarctica", "north": -73.79754996487824, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Wild, Christian; Segabinazzi-Dotto, Tiago", "project_titles": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment", "projects": [{"proj_uid": "p0010162", "repository": "USAP-DC", "title": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -76.30607835661209, "title": "Dotson-Crosson Ice Shelf data from a tale of two ice shelves paper", "uid": "601578", "west": -117.45625697487581}, {"awards": "1341464 Robinson, Rebecca", "bounds_geometry": ["POLYGON((-170.4 -60.8,-170.36 -60.8,-170.32 -60.8,-170.28 -60.8,-170.24 -60.8,-170.2 -60.8,-170.16 -60.8,-170.12 -60.8,-170.08 -60.8,-170.04 -60.8,-170 -60.8,-170 -61.34,-170 -61.88,-170 -62.42,-170 -62.96,-170 -63.5,-170 -64.04,-170 -64.58,-170 -65.12,-170 -65.66,-170 -66.2,-170.04 -66.2,-170.08 -66.2,-170.12 -66.2,-170.16 -66.2,-170.2 -66.2,-170.24 -66.2,-170.28 -66.2,-170.32 -66.2,-170.36 -66.2,-170.4 -66.2,-170.4 -65.66,-170.4 -65.12,-170.4 -64.58,-170.4 -64.04,-170.4 -63.5,-170.4 -62.96,-170.4 -62.42,-170.4 -61.88,-170.4 -61.34,-170.4 -60.8))"], "date_created": "Mon, 14 Feb 2022 00:00:00 GMT", "description": "Community composition data, generated in support of a field-based experimental investigation of the role of diatom assemblages in setting the isotopic composition of diatom bound N, show significant assemblage differences between ~66S and ~61S in the Southern Ocean during the late summer.", "east": -170.0, "geometry": ["POINT(-170.2 -63.5)"], "keywords": "Antarctica; Biota; Carboy Growouts; Diatom; Diatom Assemblage Data; NBP1702; Oceans; R/V Nathaniel B. Palmer; Southern Ocean; Southern Ocean Summer", "locations": "Southern Ocean; Antarctica", "north": -60.8, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Jones, Colin; Robinson, Rebecca; Riesselman, Christina; Robinson, Rebecca ", "project_titles": "Collaborative Proposal: A Field and Laboratory Examination of the Diatom N and Si Isotope Proxies: Implications for Assessing the Southern Ocean Biological Pump", "projects": [{"proj_uid": "p0010083", "repository": "USAP-DC", "title": "Collaborative Proposal: A Field and Laboratory Examination of the Diatom N and Si Isotope Proxies: Implications for Assessing the Southern Ocean Biological Pump"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -66.2, "title": "Diatom assemblage counts from NBP17-02 shipboard carboy experiments", "uid": "601523", "west": -170.4}, {"awards": "2037561 Jenouvrier, Stephanie; 1744794 Jenouvrier, Stephanie", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Wed, 08 Dec 2021 00:00:00 GMT", "description": "Climate impacts are not always easily discerned in wild populations as detecting climate change signals in populations is challenged by stochastic noise associated with natural climate variability, variability in biotic and abiotic processes, and observation error in demographic rates. Detection of the impact of climate change on populations requires making a formal distinction between signals in the population associated with long-term climate trends from those generated by stochastic noise. The time of emergence (ToE) identifies when the signal of anthropogenic climate change can be quantitatively distinguished from natural climate variability. This concept has been applied extensively in the climate sciences, but has not been explored in the context of population dynamics. \r\n\r\nIn Jenouvrier et al. (Global Change Biology, accepted), we outline an approach to detecting climate-driven signals in populations based on an assessment of when climate change drives population dynamics beyond the envelope characteristic of stochastic variations in an unperturbed state. \r\n\r\nThis data set is the code of a theoretical assessment of the time of emergence of climate-driven signals in population dynamics. We identify the dependence of time of emergence in populations on the magnitude of both trends and variability in climate and also explore the effect of intrinsic demographic controls on the time of emergence in population. We demonstrate that different life histories (fast species vs. slow species), demographic processes (survival, reproduction) and the relationships between climate and demographic rates, yield population dynamics that filter climate trends and variability differently. \r\n\r\nIn Jenouvrier et al. (accepted), we also illustrate empirically how to detect the point in time when anthropogenic signals in populations emerge from stochastic noise for a species threatened by climate change: the emperor penguin. This data set also includes a detailed Table and code to analyze those results.\r\n", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica", "locations": "Antarctica; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems; Antarctic Ocean and Atmospheric Sciences", "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": "1443690 Young, Duncan", "bounds_geometry": ["POLYGON((118 -74.1,118.9 -74.1,119.8 -74.1,120.7 -74.1,121.6 -74.1,122.5 -74.1,123.4 -74.1,124.3 -74.1,125.2 -74.1,126.1 -74.1,127 -74.1,127 -74.33,127 -74.56,127 -74.79,127 -75.02,127 -75.25,127 -75.48,127 -75.71,127 -75.94,127 -76.17,127 -76.4,126.1 -76.4,125.2 -76.4,124.3 -76.4,123.4 -76.4,122.5 -76.4,121.6 -76.4,120.7 -76.4,119.8 -76.4,118.9 -76.4,118 -76.4,118 -76.17,118 -75.94,118 -75.71,118 -75.48,118 -75.25,118 -75.02,118 -74.79,118 -74.56,118 -74.33,118 -74.1))"], "date_created": "Wed, 14 Jul 2021 00:00:00 GMT", "description": "This data set includes compiled and gridded ice thickness, bed elevation, and bed roughness originally published in Young et al., 2017, as well as subglacial lakes identified at the Little Dome C old ice candidate site in Antarctica.", "east": 127.0, "geometry": ["POINT(122.5 -75.25)"], "keywords": "Antarctica; EPICA Dome C; ICECAP; Ice Penetrating Radar; subglacial lake", "locations": "EPICA Dome C; Antarctica; Antarctica", "north": -74.1, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Young, Duncan A.; Roberts, Jason; Ritz, Catherine; Frezzotti, Massimo; Quartini, Enrica; Cavitte, Marie G. P; Tozer, Carly; Steinhage, Daniel; Urbini, Stefano; Corr, Hugh F. J.; Van Ommen, Tas; Blankenship, Donald D.", "project_titles": "Collaborative Research: Southern Plateau Ice-sheet Characterization and Evolution of the Central Antarctic Plate (SPICECAP)", "projects": [{"proj_uid": "p0010115", "repository": "USAP-DC", "title": "Collaborative Research: Southern Plateau Ice-sheet Characterization and Evolution of the Central Antarctic Plate (SPICECAP)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Dome C Ice Core", "south": -76.4, "title": "ICECAP: Gridded boundary conditions for Little Dome C, Antarctica, and extracted subglacial lake locations", "uid": "601463", "west": 118.0}, {"awards": "1443690 Young, Duncan", "bounds_geometry": ["POLYGON((-180 -86,-144 -86,-108 -86,-72 -86,-36 -86,0 -86,36 -86,72 -86,108 -86,144 -86,180 -86,180 -86.4,180 -86.8,180 -87.2,180 -87.6,180 -88,180 -88.4,180 -88.8,180 -89.2,180 -89.6,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -89.6,-180 -89.2,-180 -88.8,-180 -88.4,-180 -88,-180 -87.6,-180 -87.2,-180 -86.8,-180 -86.4,-180 -86))"], "date_created": "Thu, 08 Jul 2021 00:00:00 GMT", "description": "Gravity and magnetics data collected by PRIC Basler SnowEagle 601 over Titan Dome, as part of the ICECAP project and SPICECAP in particular.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; ICECAP; Titan Dome", "locations": "Titan Dome; Antarctica", "north": -86.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Greenbaum, Jamin; Young, Duncan A.; Blankenship, Donald D.; Jingxue, Guo; Bo, Sun", "project_titles": "Collaborative Research: Southern Plateau Ice-sheet Characterization and Evolution of the Central Antarctic Plate (SPICECAP)", "projects": [{"proj_uid": "p0010115", "repository": "USAP-DC", "title": "Collaborative Research: Southern Plateau Ice-sheet Characterization and Evolution of the Central Antarctic Plate (SPICECAP)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Airborne potential fields data from Titan Dome, Antarctica", "uid": "601461", "west": -180.0}, {"awards": "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; Glaciology; Ice Thickness; Radar Echo Sounder; Surface Elevation; Titan Dome", "locations": "East Antarctica; Titan Dome; 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", "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, Aerogephysical Survey", "uid": "601437", "west": 122.0}, {"awards": "1443448 Schaefer, Joerg; 1443144 Steig, Eric", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Wed, 03 Feb 2021 00:00:00 GMT", "description": "Experiments were conducted using ECHAM5-HAM atmospheric aerosol - climate model at horizontal resolution of T42 (~2.8\u00b0 latitude \u00d7 2.8\u00b0 longitude) with 19 vertical levels to examine the relationship between the production of 10Be in the atmosphere and its deposition at the surface. Five experiments were conducted, using a) constant 10Be production but varying, observed climate b) climatological climate of the last 50 years but varying 10Be production, c) constant 10Be production with 50-years of varying climate for 0 ka, (d) 6 ka, and (e) 21 ka, using the TraCE21 simulation to provide boundary conditions. The results will be useful for comparison with 10Be concentration records obtained from the South Pole ice core and other Antarctic and Greenland records.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; South Pole", "locations": "South Pole; Antarctica; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Ding, Qinghua; Schaefer, Joerg; Steig, Eric J.", "project_titles": "Collaborative Research: A High-sensitivity Beryllium-10 Record from an Ice Core at South Pole", "projects": [{"proj_uid": "p0010158", "repository": "USAP-DC", "title": "Collaborative Research: A High-sensitivity Beryllium-10 Record from an Ice Core at South Pole"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -90.0, "title": "Simulations of 10Be over Antarctica", "uid": "601431", "west": -180.0}, {"awards": "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": "0941678 ; 0424589 Gogineni, S. Prasad; 1443690 Young, Duncan; 0733025 Blankenship, Donald", "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; Glaciology; ICECAP; Ice Penetrating Radar; Internal Reflecting Horizons", "locations": "East Antarctic Plateau; Antarctica", "north": -74.0, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Earth Sciences; Antarctic Earth Sciences", "persons": "Cavitte, Marie G. P; Young, Duncan A.; Mulvaney, Robert; Ritz, Catherine; Greenbaum, Jamin; Ng, Gregory; Kempf, Scott D.; Quartini, Enrica; Muldoon, Gail R.; Paden, John; Frezzotti, Massimo; Roberts, Jason; Tozer, Carly; Schroeder, Dustin; Blankenship, Donald D.", "project_titles": "Center for Remote Sensing of Ice Sheets (CReSIS); Collaborative Research: Southern Plateau Ice-sheet Characterization and Evolution of the Central Antarctic Plate (SPICECAP); IPY Research: Investigating the Cryospheric Evolution of the Central Antarctic Plate (ICECAP)", "projects": [{"proj_uid": "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)"}, {"proj_uid": "p0000102", "repository": "USAP-DC", "title": "Center for Remote Sensing of Ice Sheets (CReSIS)"}], "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": "1543452 Blankenship, Donald; 0636724 Blankenship, Donald; 1443690 Young, Duncan; 0733025 Blankenship, Donald", "bounds_geometry": ["POLYGON((80 -65,89 -65,98 -65,107 -65,116 -65,125 -65,134 -65,143 -65,152 -65,161 -65,170 -65,170 -66.5,170 -68,170 -69.5,170 -71,170 -72.5,170 -74,170 -75.5,170 -77,170 -78.5,170 -80,161 -80,152 -80,143 -80,134 -80,125 -80,116 -80,107 -80,98 -80,89 -80,80 -80,80 -78.5,80 -77,80 -75.5,80 -74,80 -72.5,80 -71,80 -69.5,80 -68,80 -66.5,80 -65))"], "date_created": "Mon, 24 Aug 2020 00:00:00 GMT", "description": "The International Collaborative Exploration of the Cryosphere though Airborne Profiling (ICECAP) collected five seasons of aerogeophysical data data through the NSFs International Polar Year and NASAs Operation Ice Bridge programs in East Antarctica, using the coherent HiCARS 60 MHz radar system. By comparing echo strengths for different focusing apertures, and accounting for the ranges and angles involved, we can derive the \"specularity content\" of the bed echo, a proxy for small scale bed roughness and a good indicator for subglacial water pressure in regions of distributed subglacial water (Schroeder et al., 2014, IEEE GRSL, 10.1109/LGRS.2014.2337878; IEEE; Dow et al., 2019, EPSL https://doi.org/10.1016/j.epsl.2019.115961). Specularity data are inherently noisy, so these products have been smoothed with a 1 km filter.", "east": 170.0, "geometry": ["POINT(125 -72.5)"], "keywords": "Antarctica; East Antarctica; ICECAP; Ice Penetrating Radar; Radar Echo Sounder; Radar Echo Sounding; Subglacial Hydrology", "locations": "East Antarctica; Antarctica", "north": -65.0, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Earth Sciences; Antarctic Glaciology; Antarctic Integrated System Science", "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": "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)"}, {"proj_uid": "p0000254", "repository": "USAP-DC", "title": "East Antarctic Grounding Line Experiment (EAGLE)"}, {"proj_uid": "p0000174", "repository": "USAP-DC", "title": "Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System"}], "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": "1443690 Young, Duncan", "bounds_geometry": ["POLYGON((110 -68,113 -68,116 -68,119 -68,122 -68,125 -68,128 -68,131 -68,134 -68,137 -68,140 -68,140 -68.7,140 -69.4,140 -70.1,140 -70.8,140 -71.5,140 -72.2,140 -72.9,140 -73.6,140 -74.3,140 -75,137 -75,134 -75,131 -75,128 -75,125 -75,122 -75,119 -75,116 -75,113 -75,110 -75,110 -74.3,110 -73.6,110 -72.9,110 -72.2,110 -71.5,110 -70.8,110 -70.1,110 -69.4,110 -68.7,110 -68))"], "date_created": "Tue, 07 Jul 2020 00:00:00 GMT", "description": "These aerogeophysical data were collected during the seventh ICECAP field season in 2015-16, and interpreted as part of the SPICECAP project. They consist of 7 survey flights using a BT-67 Basler and the ICECAP aergeophysical suite. The flights were based out of Australia\u0027s Casey Station and France/Italy\u0027s Concordia Station in East Antarctica, as part of a focused survey of the \u0027Little Dome C\u0027, a region with a suspected 1.5 Ma ice core record. The Level 2 data here consist of ice thickness, bed elevation and surface and bed reflectivity data, bed specularity content data, unleveled magnetic anomaly data, unleveled gravity anomaly data, and laser altimetry. Formats are self documented text files parallel those used by ICECAP (found in the Operation IceBridge archive at the National Snow and Ice Data Center), GIMBLE (found at USAP-DC), EAGLE-ICECAPII (found at the Australian Antarctic Data Center) and David Glacier (found on Zenodo.org), with summary maps of included data in PNG format.", "east": 140.0, "geometry": ["POINT(125 -71.5)"], "keywords": "Aerogeophysics; Antarctica; Bed Elevation; Bed Reflectivity; EPICA Dome C; Ice Thickness", "locations": "EPICA Dome C; Antarctica", "north": -68.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Young, Duncan A.; Roberts, Jason; Blankenship, Donald D.; van Ommen, Tas; Richter, Thomas; Greenbaum, Jamin; Cavitte, Marie G. P; Beem, Lucas H.; Quartini, Enrica; Tozer, Carly; Ng, Gregory; Habbal, Feras; Kempf, Scott D.; Ritz, Catherine", "project_titles": "Collaborative Research: Southern Plateau Ice-sheet Characterization and Evolution of the Central Antarctic Plate (SPICECAP)", "projects": [{"proj_uid": "p0010115", "repository": "USAP-DC", "title": "Collaborative Research: Southern Plateau Ice-sheet Characterization and Evolution of the Central Antarctic Plate (SPICECAP)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Dome C Ice Core", "south": -75.0, "title": "ICECAP: High resolution survey of the Little Dome C region in support of the IPICS Old Ice goal", "uid": "601355", "west": 110.0}, {"awards": "0732651 Gordon, Arnold; 1141890 Huber, Bruce", "bounds_geometry": ["POLYGON((-62 -61,-61.3 -61,-60.6 -61,-59.9 -61,-59.2 -61,-58.5 -61,-57.8 -61,-57.1 -61,-56.4 -61,-55.7 -61,-55 -61,-55 -61.44,-55 -61.88,-55 -62.32,-55 -62.76,-55 -63.2,-55 -63.64,-55 -64.08,-55 -64.52,-55 -64.96,-55 -65.4,-55.7 -65.4,-56.4 -65.4,-57.1 -65.4,-57.8 -65.4,-58.5 -65.4,-59.2 -65.4,-59.9 -65.4,-60.6 -65.4,-61.3 -65.4,-62 -65.4,-62 -64.96,-62 -64.52,-62 -64.08,-62 -63.64,-62 -63.2,-62 -62.76,-62 -62.32,-62 -61.88,-62 -61.44,-62 -61))"], "date_created": "Thu, 25 Jun 2020 00:00:00 GMT", "description": "This data set was acquired with a ship-based LDEO LADCP Sonar during Nathaniel B. Palmer expedition NBP1203 conducted in 2012 (Chief Scientist: Dr. Maria Vernet; Investigator(s): Dr. Bruce Huber and Dr. Arnold Gordon). These data files are of Matlab Binary format and include Current Measurement data and were processed after data collection. Funding was provided by NSF grant(s): ANT11-41890.", "east": -55.0, "geometry": ["POINT(-58.5 -63.2)"], "keywords": "Antarctica; Antarctic Peninsula; Current Measurements; LADCP; LARISSA; Larsen Ice Shelf; NBP1203; Oceans; Physical Oceanography; R/V Nathaniel B. Palmer", "locations": "Antarctic Peninsula; Larsen Ice Shelf; Antarctica", "north": -61.0, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences; Antarctic Integrated System Science", "persons": "Huber, Bruce; Gordon, Arnold", "project_titles": "Cape Adare Long Term Moorings (CALM): Analysis Phase; Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans", "projects": [{"proj_uid": "p0000495", "repository": "USAP-DC", "title": "Cape Adare Long Term Moorings (CALM): Analysis Phase"}, {"proj_uid": "p0000101", "repository": "USAP-DC", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.4, "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": "0732467 Domack, Eugene; 0732651 Gordon, Arnold", "bounds_geometry": ["POLYGON((-68 -60,-66.7 -60,-65.4 -60,-64.1 -60,-62.8 -60,-61.5 -60,-60.2 -60,-58.9 -60,-57.6 -60,-56.3 -60,-55 -60,-55 -60.6,-55 -61.2,-55 -61.8,-55 -62.4,-55 -63,-55 -63.6,-55 -64.2,-55 -64.8,-55 -65.4,-55 -66,-56.3 -66,-57.6 -66,-58.9 -66,-60.2 -66,-61.5 -66,-62.8 -66,-64.1 -66,-65.4 -66,-66.7 -66,-68 -66,-68 -65.4,-68 -64.8,-68 -64.2,-68 -63.6,-68 -63,-68 -62.4,-68 -61.8,-68 -61.2,-68 -60.6,-68 -60))"], "date_created": "Thu, 25 Jun 2020 00:00:00 GMT", "description": "This data set was acquired with a ship-based LDEO LADCP Sonar during Nathaniel B. Palmer expedition NBP1001 conducted in 2010 (Chief Scientist: Dr. Eugene Domack; Investigator(s): Dr. Bruce Huber and Dr. Arnold Gordon). These data files are of Matlab Binary format and include Current Measurement data and were processed after data collection. Data were acquired as part of the project(s): Collaborative Research in IPY: Abrupt Environmental Change in the LARsen Ice Shelf System, Antarctica (LARISSA), and funding was provided by NSF grant(s): ANT07-32467.", "east": -55.0, "geometry": ["POINT(-61.5 -63)"], "keywords": "Antarctica; Antarctic Peninsula; Current Measurements; LADCP; Larsen Ice Shelf; NBP1001; Oceans; Physical Oceanography; R/V Nathaniel B. Palmer", "locations": "Antarctic Peninsula; Larsen Ice Shelf; 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 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": null, "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Mon, 04 May 2020 00:00:00 GMT", "description": "Raw Satellite Images acquired during several Nathaniel B. Palmer and LM Gould expeditions. These are mostly downloaded during the cruises, often directly using the ships satellite receiver (TerraSat system). The data include visible and infrared images. They are organized by expedition.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; LMG0301; LMG0302; LMG0304; LMG0309; LMG0411; LMG0412; LMG0413A; LMG0414; LMG0502; LMG0511; LMG0512; LMG0514; LMG0605; LMG0610; LMG0611; LMG0611B; LMG0612; LMG0717; LMG0804; LMG0808; LMG0809; LMG0901; LMG0905; LMG0906A; LMG0909; LMG0910; LMG1001; NBP0107; NBP0301; NBP0302; NBP0304A; NBP0305; NBP0305A; NBP0401; NBP0402; NBP0404; NBP0409; NBP0501; NBP0506; NBP0508; NBP0601; NBP0602A; NBP0603; NBP0608; NBP0701; NBP0702; NBP0703; NBP0709; NBP0710; NBP0711; NBP0801; NBP0802; NBP0803; NBP0804; NBP0805; NBP0806; NBP0808; NBP0901; NBP0908; NBP1101; NBP1102; Satellite; Satellite Imagery", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": null, "persons": null, "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -90.0, "title": "Raw satellite images from NB Palmer and LM Gould Antarctic cruises", "uid": "601313", "west": -180.0}, {"awards": "1143836 Leventer, Amy", "bounds_geometry": ["POLYGON((118 -65.5,118.3 -65.5,118.6 -65.5,118.9 -65.5,119.2 -65.5,119.5 -65.5,119.8 -65.5,120.1 -65.5,120.4 -65.5,120.7 -65.5,121 -65.5,121 -65.65,121 -65.8,121 -65.95,121 -66.1,121 -66.25,121 -66.4,121 -66.55,121 -66.7,121 -66.85,121 -67,120.7 -67,120.4 -67,120.1 -67,119.8 -67,119.5 -67,119.2 -67,118.9 -67,118.6 -67,118.3 -67,118 -67,118 -66.85,118 -66.7,118 -66.55,118 -66.4,118 -66.25,118 -66.1,118 -65.95,118 -65.8,118 -65.65,118 -65.5))"], "date_created": "Fri, 01 May 2020 00:00:00 GMT", "description": "This Biology Species Abundance data set was acquired with a ship-based Camera during Nathaniel B. Palmer expedition NBP1001 conducted in 2010 (Chief Scientist: Dr. Eugene Domack; Investigator: Dr. Craig Smith). The data file is in XLS format and includes Biology Species Abundance Biology data that has not been processed. The data was acquired as part of the project called Collaborative Research in IPY: Abrupt Environmental Change in the LARsen Ice Shelf System, Antarctica (LARISSA).", "east": 121.0, "geometry": ["POINT(119.5 -66.25)"], "keywords": "Antarctica; Benthic Images; Camera; East Antarctica; Marine Geoscience; NBP1402; Photo/Video; R/V Nathaniel B. Palmer; Sabrina Coast; Totten Glacier; Video Data; YoYo Camera", "locations": "East Antarctica; Totten Glacier; Sabrina Coast; Antarctica", "north": -65.5, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Leventer, Amy; Post, Alexandra; Blankenship, Donald D.; Domack, Eugene Walter; Gulick, Sean; Huber, Bruce; Orsi, Alejandro; Shevenell, Amelia", "project_titles": "Collaborative Research: Totten Glacier System and the Marine Record of Cryosphere - Ocean Dynamics", "projects": [{"proj_uid": "p0000008", "repository": "USAP-DC", "title": "Collaborative Research: Totten Glacier System and the Marine Record of Cryosphere - Ocean Dynamics"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -67.0, "title": "Near-bottom Videos from the Southern Ocean acquired during R/V Nathaniel B. Palmer expedition NBP1402", "uid": "601312", "west": 118.0}, {"awards": "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. 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; NBP1001; Oceans; R/V Nathaniel B. Palmer; Seafloor Sampling; Species Abundance", "locations": "Antarctic Peninsula; Larsen Ice Shelf; Larsen Ice Shelf; Antarctica", "north": -61.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Smith, Craig", "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": -67.8, "title": "Macrofauna Species Abundance Raw Data from the Larsen Ice Shelf acquired during the Nathaniel B. Palmer expedition NBP1001", "uid": "601306", "west": -69.0}, {"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. 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. Palmer; Seafloor Sampling; Species Abundance", "locations": "Antarctic Peninsula; Larsen Ice Shelf; Antarctica", "north": -61.0, "nsf_funding_programs": "Antarctic Organisms and Ecosystems", "persons": "Smith, Craig", "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": -67.8, "title": "Megafauna Species Abundance Raw Data from the Larsen Ice Shelf acquired during the Nathaniel B. Palmer expedition NBP1001", "uid": "601305", "west": -69.0}, {"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; R/V Laurence M. Gould; Ship; YoYo Camera", "locations": "Antarctic Peninsula; Antarctica", "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": "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": "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. 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 (Chief Scientist: Dr. Robin Bell; Investigator(s): Dr. Sergei Andrianov). These data files are of Text File (ASCII) format and include Gravity Free Air Anomaly data and were processed after data collection.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "ADGRAV; Antarctica; Geology/Geophysics - Other; Gravimeter; Gravity; PMGRE IL-38", "locations": "Antarctica; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Andrianov, Sergei; Bell, Robin", "project_titles": "The Development of a New Generation Gravity Map of Antarctica", "projects": [{"proj_uid": "p0010092", "repository": "USAP-DC", "title": "The Development of a New Generation Gravity Map of Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Russian processed Gravimeter data from the Antarctica assembled as part of the ADGRAV Data Compilation (1990)", "uid": "601280", "west": -180.0}, {"awards": "9725374 Bell, Robin", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Fri, 17 Apr 2020 00:00:00 GMT", "description": "This data set was acquired with a ship-based Gravimeter assembled as part of the 1990 ADGRAV data compilation (Chief Scientist: Dr. Robin Bell; Investigator(s): Dr. Detlef Damaske). These data files are of Text File (ASCII) format and include Gravity Free Air Anomaly data and were processed after data collection.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "ADGRAV; Antarctica; Geology/Geophysics - Other; Gravimeter; Gravity; Marine Geoscience; Ship", "locations": "Antarctica; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Damaske, Detlef; Bell, Robin", "project_titles": "The Development of a New Generation Gravity Map of Antarctica", "projects": [{"proj_uid": "p0010092", "repository": "USAP-DC", "title": "The Development of a New Generation Gravity Map of Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "BGR processed Gravimeter data from the Antarctica assembled as part of the ADGRAV Data Compilation (1990)", "uid": "601281", "west": -180.0}, {"awards": "9725374 Bell, Robin", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Fri, 17 Apr 2020 00:00:00 GMT", "description": "This data set was acquired with a ship-based Gravimeter assembled as part of the 1990 ADGRAV data compilation (Chief Scientist: Dr. Robin Bell; Investigator(s): Dr. Yasufumi Nogi). These data files are of Text File (ASCII) format and include Gravity Free Air Anomaly data and were processed after data collection.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "ADGRAV; Antarctica; Geology/Geophysics - Other; Gravimeter; Gravity; Marine Geoscience; Ship", "locations": "Antarctica; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Nogi, Yasufumi; Bell, Robin", "project_titles": "The Development of a New Generation Gravity Map of Antarctica", "projects": [{"proj_uid": "p0010092", "repository": "USAP-DC", "title": "The Development of a New Generation Gravity Map of Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Japanese processed Gravimeter Data from the Antarctica assembled as part of the ADGRAV Data Compilation (1990)", "uid": "601282", "west": -180.0}, {"awards": "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; Depth; 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; South Pole; SPICEcore", "locations": "South Pole; Antarctica", "north": -90.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Winski, Dominic A.; Fudge, T. J.; Dunbar, Nelia; Buizert, Christo; Bay, Ryan; Souney, Joseph Jr.; Sigl, Michael; McConnell, Joseph; Fegyveresi, John; Cole-Dai, Jihong; Thundercloud, Zayta; Cox, Thomas S.; Kreutz, Karl; Epifanio, Jenna; Ortman, Nikolas; Brook, Edward J.; Beaudette, Ross; Sowers, Todd A.; Steig, Eric J.; Morris, Valerie; Kahle, Emma; Ferris, David G.; Aydin, Murat; Nicewonger, Melinda R.; Casey, Kimberly A.; Alley, Richard; Waddington, Edwin D.; Osterberg, Erich; Severinghaus, Jeffrey P.; Jones, Tyler R.; Iverson, Nels", "project_titles": "Collaborative Research: South Pole Ice Core Chronology and Climate Records using Chemical and Microparticle Measurements", "projects": [{"proj_uid": "p0010051", "repository": "USAP-DC", "title": "Collaborative Research: South Pole Ice Core Chronology and Climate Records using Chemical and Microparticle Measurements"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -90.0, "title": "The South Pole Ice Core (SPICEcore) chronology and supporting data", "uid": "601206", "west": -180.0}, {"awards": "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; Southern Ocean; Station List; YoYo Camera", "locations": "Southern Ocean; Antarctica", "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; 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; CO2; Dust; Gas; Geochemistry; Glaciers/Ice Sheet; Glaciology; Ice Core; Ice Core Records; Mass Spectrometer; Methane; Nitrogen Isotopes; Oxygen Isotope; Paleoclimate; 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": "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; 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": "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": "Larsen C Ice Shelf; Southern Ocean; Antarctica", "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": "0943466 Hawley, Robert", "bounds_geometry": ["POLYGON((-163 -79,-162.8 -79,-162.6 -79,-162.4 -79,-162.2 -79,-162 -79,-161.8 -79,-161.6 -79,-161.4 -79,-161.2 -79,-161 -79,-161 -79.05,-161 -79.1,-161 -79.15,-161 -79.2,-161 -79.25,-161 -79.3,-161 -79.35,-161 -79.4,-161 -79.45,-161 -79.5,-161.2 -79.5,-161.4 -79.5,-161.6 -79.5,-161.8 -79.5,-162 -79.5,-162.2 -79.5,-162.4 -79.5,-162.6 -79.5,-162.8 -79.5,-163 -79.5,-163 -79.45,-163 -79.4,-163 -79.35,-163 -79.3,-163 -79.25,-163 -79.2,-163 -79.15,-163 -79.1,-163 -79.05,-163 -79))"], "date_created": "Tue, 13 Feb 2018 00:00:00 GMT", "description": "A Borehole Optical Televiewer (OPTV) uses a conical mirror and scanning electronics to record a continuous 360-degree image of the borehole wall. An inclinometer and magnetometer allow the image to be \u0027unwrapped\u0027 and resented as a rectangular image, which shows the visible features of the wall oriented to magnetic north. This dataset includes both the raw bitmap (bmp) image data from the televiewer, as well as proprietary WellCad format (wcl) files. The WellCad format files contain the inclinometry, orientation, and temperature data in addition to the imagery data. Wellcad files can be viewed with a free wellcad file reader available from https://www.alt.lu/downloads.htm. This dataset includes OPTV logs from each of two seasons, November 2013 and 2014. The logs are of the 760 m deep hole drilled by the RICE project, a NZ-USA partnership.", "east": -161.0, "geometry": ["POINT(-162 -79.25)"], "keywords": "Antarctica; Glaciers/Ice Sheet; Glaciology; Roosevelt Island; Snow/Ice", "locations": "Roosevelt Island; Antarctica", "north": -79.0, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Glaciology", "persons": "Hawley, Robert L.; Clemens-Sewall, David", "project_titles": "Collaborative Research: Deglaciation of the Ross Sea Embayment - constraints from Roosevelt Island", "projects": [{"proj_uid": "p0000272", "repository": "USAP-DC", "title": "Collaborative Research: Deglaciation of the Ross Sea Embayment - constraints from Roosevelt Island"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.5, "title": "Roosevelt Island Borehole Optical Televiewer logs", "uid": "601086", "west": -163.0}, {"awards": "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; 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": "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; Gravity; Marie Byrd Land; Navigation; Potential Field; Solid Earth", "locations": "Marie Byrd Land; Antarctica", "north": -74.5, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Young, Duncan A.; Holt, John W.; Blankenship, Donald D.", "project_titles": "Geophysical Investigations of Marie Byrd Land Lithospheric Evolution (GIMBLE)", "projects": [{"proj_uid": "p0000435", "repository": "USAP-DC", "title": "Geophysical Investigations of Marie Byrd Land Lithospheric Evolution (GIMBLE)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.0, "title": "Gravity disturbance data over central Marie Byrd Land, West Antarctica (GIMBLE.GGCMG2)", "uid": "601003", "west": -156.0}, {"awards": "1043761 Young, Duncan", "bounds_geometry": ["POLYGON((-156 -74.5,-151.4 -74.5,-146.8 -74.5,-142.2 -74.5,-137.6 -74.5,-133 -74.5,-128.4 -74.5,-123.8 -74.5,-119.2 -74.5,-114.6 -74.5,-110 -74.5,-110 -75.05,-110 -75.6,-110 -76.15,-110 -76.7,-110 -77.25,-110 -77.8,-110 -78.35,-110 -78.9,-110 -79.45,-110 -80,-114.6 -80,-119.2 -80,-123.8 -80,-128.4 -80,-133 -80,-137.6 -80,-142.2 -80,-146.8 -80,-151.4 -80,-156 -80,-156 -79.45,-156 -78.9,-156 -78.35,-156 -77.8,-156 -77.25,-156 -76.7,-156 -76.15,-156 -75.6,-156 -75.05,-156 -74.5))"], "date_created": "Mon, 20 Feb 2017 00:00:00 GMT", "description": "GIMBLE was proposed as the first systematic aerogeophysical investigation of the subglacial massif underlying central Marie Byrd Land. Aerogeophysically configured Baslers conducted 14 flights from Byrd Surface Camp and WAIS Divide Camp over two field seasons (January 2013 and December 2014). Airborne ice penetrating radar, gravity and magnetics were the primary datasets collected. Level 2 data represent geolocated geophysical properties (e.g ice thickness), derived from Level 1B measurements (e.g. radar echo delay). Dataset structures are based on those used for Operation Ice Bridge, and are line based data in ASCII space delimited .txt files, with a header delimited by leading \"#\" characters documenting column assignment and metadata. Georefering data is contained in .met files. GIMBLE.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; Magnetic; Marie Byrd Land; Navigation; Potential Field; Solid Earth", "locations": "Marie Byrd Land; Antarctica", "north": -74.5, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Young, Duncan A.; Holt, John W.; Blankenship, Donald D.", "project_titles": "Geophysical Investigations of Marie Byrd Land Lithospheric Evolution (GIMBLE)", "projects": [{"proj_uid": "p0000435", "repository": "USAP-DC", "title": "Geophysical Investigations of Marie Byrd Land Lithospheric Evolution (GIMBLE)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.0, "title": "Magnetic anomaly data over central Marie Byrd Land, West Antarctica (GIMBLE.GMGEO2)", "uid": "601002", "west": -156.0}, {"awards": "1043761 Young, Duncan", "bounds_geometry": ["POLYGON((-156 -74.5,-151.4 -74.5,-146.8 -74.5,-142.2 -74.5,-137.6 -74.5,-133 -74.5,-128.4 -74.5,-123.8 -74.5,-119.2 -74.5,-114.6 -74.5,-110 -74.5,-110 -75.05,-110 -75.6,-110 -76.15,-110 -76.7,-110 -77.25,-110 -77.8,-110 -78.35,-110 -78.9,-110 -79.45,-110 -80,-114.6 -80,-119.2 -80,-123.8 -80,-128.4 -80,-133 -80,-137.6 -80,-142.2 -80,-146.8 -80,-151.4 -80,-156 -80,-156 -79.45,-156 -78.9,-156 -78.35,-156 -77.8,-156 -77.25,-156 -76.7,-156 -76.15,-156 -75.6,-156 -75.05,-156 -74.5))"], "date_created": "Mon, 20 Feb 2017 00:00:00 GMT", "description": "GIMBLE was proposed as the first systematic aerogeophysical investigation of the subglacial massif underlying central Marie Byrd Land. Aerogeophysically configured Baslers conducted 14 flights from Byrd Surface Camp and WAIS Divide Camp over two field seasons (January 2013 and December 2014). Airborne ice penetrating radar, gravity and magnetics were the primary datasets collected. Level 2 data represent geolocated geophysical properties (e.g ice thickness), derived from Level 1B measurements (e.g. radar echo delay). Dataset structures are based on those used for Operation Ice Bridge, and are line based data in ASCII space delimited .txt files, with a header delimited by leading \"#\" characters documenting column assignment and metadata. Georefering data is contained in .met files. GIMBLE.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; Glaciology; Ice Thickness; Marie Byrd Land; Navigation; Radar", "locations": "Marie Byrd Land; Antarctica", "north": -74.5, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Young, Duncan A.; Holt, John W.; Blankenship, Donald D.", "project_titles": "Geophysical Investigations of Marie Byrd Land Lithospheric Evolution (GIMBLE)", "projects": [{"proj_uid": "p0000435", "repository": "USAP-DC", "title": "Geophysical Investigations of Marie Byrd Land Lithospheric Evolution (GIMBLE)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.0, "title": "Ice thickness and related data over central Marie Byrd Land, West Antarctica (GIMBLE.GR2HI2)", "uid": "601001", "west": -156.0}, {"awards": "0839059 Powell, Ross", "bounds_geometry": ["POLYGON((-168.7 -82.3,-168.69 -82.3,-168.68 -82.3,-168.67 -82.3,-168.66 -82.3,-168.65 -82.3,-168.64 -82.3,-168.63 -82.3,-168.62 -82.3,-168.61 -82.3,-168.6 -82.3,-168.6 -82.31,-168.6 -82.32,-168.6 -82.33,-168.6 -82.34,-168.6 -82.35,-168.6 -82.36,-168.6 -82.37,-168.6 -82.38,-168.6 -82.39,-168.6 -82.4,-168.61 -82.4,-168.62 -82.4,-168.63 -82.4,-168.64 -82.4,-168.65 -82.4,-168.66 -82.4,-168.67 -82.4,-168.68 -82.4,-168.69 -82.4,-168.7 -82.4,-168.7 -82.39,-168.7 -82.38,-168.7 -82.37,-168.7 -82.36,-168.7 -82.35,-168.7 -82.34,-168.7 -82.33,-168.7 -82.32,-168.7 -82.31,-168.7 -82.3))"], "date_created": "Fri, 01 Jan 2016 00:00:00 GMT", "description": "The LISSARD project (Lake and Ice Stream Subglacial Access Research Drilling) is one of three research components of the WISSARD integrative initiative (Whillans Ice Stream Subglacial Access Research Drilling) that is being funded by the Antarctic Integrated System Science Program of NSF\u0027s Office of Polar Programs, Antarctic Division. The overarching scientific objective of WISSARD is to assess the role of water beneath a West Antarctic ice stream in interlinked glaciological, geological, microbiological, geochemical, and oceanographic systems. The LISSARD component of WISSARD focuses on the role of active subglacial lakes in determining how fast the West Antarctic ice sheet loses mass to the global ocean and influences global sea level changes. The importance of Antarctic subglacial lakes has only been recently recognized, and the lakes have been identified as high priority targets for scientific investigations because of their unknown contributions to ice sheet stability under future global warming scenarios. LISSARD has several primary science goals: A) To provide an observational basis for improving treatments of subglacial hydrological and mechanical processes in models of ice sheet mass balance and stability; B) To reconstruct the past history of ice stream stability by analyzing archives of past basal water and ice flow variability contained in subglacial sediments, porewater, lake water, and basal accreted ice; C) To provide background understanding of subglacial lake environments to benefit RAGES and GBASE (the other two components of the WISSARD project); and D) To synthesize data and concepts developed as part of this project to determine whether subglacial lakes play an important role in (de)stabilizing Antarctic ice sheets. We propose an unprecedented synthesis of approaches to studying ice sheet processes, including: (1) satellite remote sensing, (2) surface geophysics, (3) borehole observations and measurements and, (4) basal and subglacial sampling.\nThe latest report of the Intergovernmental Panel on Climate Change recognized that the greatest uncertainties in assessing future global sea-level change stem from a poor understanding of ice sheet dynamics and ice sheet vulnerability to oceanic and atmospheric warming. Disintegration of the WAIS (West Antarctic Ice Sheet) alone would contribute 3-5 m to global sea-level rise, making WAIS a focus of scientific concern due to its potential susceptibility to internal or ocean-driven instability. The overall WISSARD project will test the overarching hypothesis that active water drainage connects various subglacial environments and exerts major control on ice sheet flow, geochemistry, metabolic and phylogenetic diversity, and biogeochemical transformations.\nSocietal Relevance: Global warming, melting of ice sheets and consequential sea-level rise are of high societal relevance. Science Resource Development: After a 9-year hiatus WISSARD will provide the US-science community with a renewed capability to access and study sub-ice sheet environments. Developing this technological infrastructure will benefit the broader science community and assets will be accessible for future use through the NSF-OPP drilling contractor. Furthermore, these projects will pioneer an approach implementing recommendations from the National Research Council committee on Principles of Environmental Stewardship for the Exploration and Study of Subglacial Environments (2007). Education and Outreach (E/O): These activities are grouped into four categories: i) increasing student participation in polar research by fully integrating them in our research programs; ii) introducing new investigators to the polar sciences by incorporating promising young investigators in our programs, iii) promotion of K-12 teaching and learning programs by incorporating various teachers and NSTA programs, and iv) reaching a larger public audience through such venues as popular science magazines, museum based activities and videography and documentary films. In summary, WISSARD will promote scientific exploration of Antarctica by conveying to the public the excitement of accessing and studying what may be some of the last unexplored aquatic environments on Earth, and which represent a potential analogue for extraterrestrial life habitats on Europa and Mars.", "east": -168.6, "geometry": ["POINT(-168.65 -82.35)"], "keywords": "Antarctica; Biota; Diatom; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Lake Whillans; Paleoclimate; Ross Sea; Southern Ocean; subglacial lake; WISSARD", "locations": "Lake Whillans; Ross Sea; Southern Ocean; Antarctica", "north": -82.3, "nsf_funding_programs": null, "persons": "Powell, Ross", "project_titles": "Collaborative Research: Integrative Study of Marine Ice Sheet Stability \u0026 Subglacial Life Habitats in W Antarctica - Lake \u0026 Ice Stream Subglacial Access Research Drilling (LISSARD)", "projects": [{"proj_uid": "p0000105", "repository": "USAP-DC", "title": "Collaborative Research: Integrative Study of Marine Ice Sheet Stability \u0026 Subglacial Life Habitats in W Antarctica - Lake \u0026 Ice Stream Subglacial Access Research Drilling (LISSARD)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -82.4, "title": "Integrative Study of Marine Ice Sheet Stability and Subglacial Life Habitats in W Antarctica - Lake and Ice Stream Subglacial Access Research Drilling (LISSARD)", "uid": "600154", "west": -168.7}, {"awards": "1043167 White, James", "bounds_geometry": ["POINT(-112.08 -79.47)"], "date_created": "Fri, 01 Jan 2016 00:00:00 GMT", "description": "This award supports a project to contribute one of the cornerstone analyses, stable isotopes of ice (Delta-D, Delta-O18) to the ongoing West Antarctic Ice Sheet Divide (WAIS) deep ice core. The WAIS Divide drilling project, a multi-institution project to obtain a continuous high resolution ice core record from central West Antarctica, reached a depth of 2560 m in early 2010; it is expected to take one or two more field seasons to reach the ice sheet bed (~3300 m), plus an additional four seasons for borehole logging and other activities including proposed replicate coring. The current proposal requests support to complete analyses on the WAIS Divide core to the base, where the age will be ~100,000 years or more. These analyses will form the basis for the investigation of a number of outstanding questions in climate and glaciology during the last glacial period, focused on the dynamics of the West Antarctic Ice Sheet and the relationship of West Antarctic climate to that of the Northern polar regions, the tropical Pacific, and the rest of the globe, on time scales ranging from years to tens of thousands of years. One new aspect of this work is the growing expertise at the University of Washington in climate modeling with isotope-tracer-enabled general circulation models, which will aid in the interpretation of the data. Another major new aspect is the completion and use of a high-resolution, semi-automated sampling system at the University of Colorado, which will permit the continuous analysis of isotope ratios via laser spectroscopy, at an effective resolution of ~2 cm or less, providing inter-annual time resolution for most of the core. Because continuous flow analyses of stable ice isotopes is a relatively new measurement, we will complement them with parallel measurements, every ~10-20 m, using traditional discrete sampling and analysis by mass spectrometry at the University of Washington. The intellectual merit and the overarching goal of the work are to see Inland WAIS become the reference ice isotope record for West Antarctica. The broader impacts of the work are that the data generated in this project pertain directly to policy-relevant and immediate questions of the stability of the West Antarctic ice sheet, and thus past and future changes in sea level, as well as the nature of climate change in the high southern latitudes. The project will also contribute to the development of modern isotope analysis techniques using laser spectroscopy, with applications well beyond ice cores. The project will involve a graduate student and postdoc who will work with both P.I.s, and spend time at both institutions. Data will be made available rapidly through the Antarctic Glaciological Data Center, for use by other researchers and the public.", "east": -112.08, "geometry": ["POINT(-112.08 -79.47)"], "keywords": "Antarctica; Geochemistry; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Isotope; Paleoclimate; Snow Accumulation; WAIS divide; WAIS Divide Ice Core", "locations": "WAIS divide; Antarctica", "north": -79.47, "nsf_funding_programs": null, "persons": "White, James; Morris, Valerie; Vaughn, Bruce; Jones, Tyler R.", "project_titles": "Collaborative Research: Stable Isotopes of Ice in the Transition and Glacial Sections of the WAIS Divide Deep Ice Core", "projects": [{"proj_uid": "p0000078", "repository": "USAP-DC", "title": "Collaborative Research: Stable Isotopes of Ice in the Transition and Glacial Sections of the WAIS Divide Deep Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.47, "title": "Stable Isotopes of Ice in the Transition and Glacial Sections of the WAIS Divide Deep Ice Core", "uid": "600169", "west": -112.08}, {"awards": "0839107 Powell, Ross", "bounds_geometry": ["POLYGON((-163.7 -84,-163.68 -84,-163.66 -84,-163.64 -84,-163.62 -84,-163.6 -84,-163.58 -84,-163.56 -84,-163.54 -84,-163.52 -84,-163.5 -84,-163.5 -84.05,-163.5 -84.1,-163.5 -84.15,-163.5 -84.2,-163.5 -84.25,-163.5 -84.3,-163.5 -84.35,-163.5 -84.4,-163.5 -84.45,-163.5 -84.5,-163.52 -84.5,-163.54 -84.5,-163.56 -84.5,-163.58 -84.5,-163.6 -84.5,-163.62 -84.5,-163.64 -84.5,-163.66 -84.5,-163.68 -84.5,-163.7 -84.5,-163.7 -84.45,-163.7 -84.4,-163.7 -84.35,-163.7 -84.3,-163.7 -84.25,-163.7 -84.2,-163.7 -84.15,-163.7 -84.1,-163.7 -84.05,-163.7 -84))"], "date_created": "Fri, 01 Jan 2016 00:00:00 GMT", "description": "The RAGES project (Robotic Access to Grounding zones for Exploration and Science) is one of three research components of the WISSARD (Whillans Ice Stream Subglacial Access Research Drilling) integrative initiative that is being funded by the Antarctic Integrated System Science Program of NSF\u0027s Office of Polar Programs, Antarctic Division. The overarching scientific objective of WISSARD is to assess the role of water beneath a West Antarctic ice stream in interlinked glaciological, geological, microbiological, geochemical, and oceanographic systems. The RAGES component of WISSARD concentrates on the stability of ice stream grounding zones (GZ), the area where the ice, ocean waters and glacial and sea floor sediment interact. Based on our present limited data and modeling efforts, GZs can be perturbed by (i) internal ice stream dynamics, (ii) filling/draining cycles of subglacial lakes, (iii) increased melting by warming ocean waters, and/or (iv) rates of subglacial sediment (till) supply to the GZ. GZs are seen as high priority targets to investigate due to their unknown contributions to ice sheet stability under future global warming scenarios. The three main science goals for RAGES are to assess: (a) West Antarctic Ice Sheet (WAIS) stability relative to the magnitudes of the four main variables listed above; (b) the degree to which grounding-zone sedimentary systems house important records of past WAIS dynamics; and (c) the importance of microbial activity and subglacial geochemical weathering in supplying nutrients to the WAIS grounding zone, the Ross Ice Shelf (RIS) cavity, and the highly productive Southern Ocean that may ultimately influence global biogeochemical cycles. The RAGES field sampling plan integrates surface geophysical surveys with borehole and subglacial sampling and measurements. The boreholes provide: (1) samples of subglacial water, sediments, and basal ice for biological, geochemical, glaciological, sedimentological, and micropaleontological analyses; (2) measures of subglacial and sub-ice-shelf cavity physical and chemical conditions and their spatial variability; and (3) data on sediment types, state and change of the subglacial water discharge, oceanography, and basal ice at the grounding line and within the nearby sub-ice-shelf cavity. Unique tools to be deployed include a multisensor Sub-Ice ROVer (Remotely Operated Vehicle) and long-term, sub-ice oceanographic moorings.\nThe latest report of the Intergovernmental Panel on Climate Change recognized that the greatest uncertainties in assessing future global sea-level change stem from a poor understanding of ice sheet dynamics and ice sheet vulnerability to oceanic and atmospheric warming. Disintegration of the WAIS (West Antarctic Ice Sheet) alone would contribute 3-5 m to global sea-level rise, making WAIS a focus of scientific concern due to its potential susceptibility to internal or ocean-driven instability. The overall WISSARD project will test the overarching hypothesis that active water drainage connects various subglacial environments and exerts major control on ice sheet flow, geochemistry, metabolic and phylogenetic diversity, and biogeochemical transformations.\nSocietal Relevance: Global warming, melting of ice sheets and consequential sea-level rise are of high societal relevance. Science Resource Development: After a 9-year hiatus WISSARD will provide the US-science community with a renewed capability to access and study sub-ice sheet environments. Developing this technological infrastructure will benefit the broader science community and assets will be accessible for future use through the NSF-OPP drilling contractor. The RAGES project represents a significant advance in polar technology by incorporating the use of complex new instrumentation like the Sub-Ice ROVer and subglacial ocean/lake mooring systems. Furthermore, these projects will pioneer an approach implementing recommendations from the National Research Council committee on Principles of Environmental Stewardship for the Exploration and Study of Subglacial Environments (2007). Education and Outreach (E/O): These activities are grouped into four categories: i) increasing student participation in polar research by fully integrating them in our research programs; ii) introducing new investigators to the polar sciences by incorporating promising young investigators in our programs, iii) promotion of K-12 teaching and learning programs by incorporating various teachers and NSTA programs, and iv) reaching a larger public audience through such venues as popular science magazines, museum based activities and videography and documentary films. In summary, WISSARD will promote scientific exploration of Antarctica by conveying to the public the excitement of accessing and studying what may be some of the last unexplored aquatic environments on Earth, and which represent a potential analogue for extraterrestrial life habitats on Europa and Mars.", "east": -163.5, "geometry": ["POINT(-163.6 -84.25)"], "keywords": "Antarctica; Glaciology; Oceans; Southern Ocean; WISSARD", "locations": "Southern Ocean; Antarctica", "north": -84.0, "nsf_funding_programs": null, "persons": "Powell, Ross", "project_titles": "Collaborative Research: Integrative Study of Marine Ice Sheet Stability \u0026 Subglacial Life Habitats in W Antarctica - Lake \u0026 Ice Stream Subglacial Access Research Drilling (LISSARD)", "projects": [{"proj_uid": "p0000105", "repository": "USAP-DC", "title": "Collaborative Research: Integrative Study of Marine Ice Sheet Stability \u0026 Subglacial Life Habitats in W Antarctica - Lake \u0026 Ice Stream Subglacial Access Research Drilling (LISSARD)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -84.5, "title": "Integrative Study of Marine Ice Sheet Stability and Subglacial Life Habitats - Robotic Access to Grounding-zones for Exploration and Science (RAGES)", "uid": "600155", "west": -163.7}, {"awards": "1146399 Sidor, Christian", "bounds_geometry": ["POLYGON((162.41 -84.27,163.409 -84.27,164.408 -84.27,165.407 -84.27,166.406 -84.27,167.405 -84.27,168.404 -84.27,169.403 -84.27,170.402 -84.27,171.401 -84.27,172.4 -84.27,172.4 -84.353,172.4 -84.436,172.4 -84.519,172.4 -84.602,172.4 -84.685,172.4 -84.768,172.4 -84.851,172.4 -84.934,172.4 -85.017,172.4 -85.1,171.401 -85.1,170.402 -85.1,169.403 -85.1,168.404 -85.1,167.405 -85.1,166.406 -85.1,165.407 -85.1,164.408 -85.1,163.409 -85.1,162.41 -85.1,162.41 -85.017,162.41 -84.934,162.41 -84.851,162.41 -84.768,162.41 -84.685,162.41 -84.602,162.41 -84.519,162.41 -84.436,162.41 -84.353,162.41 -84.27))"], "date_created": "Thu, 01 Jan 2015 00:00:00 GMT", "description": "The PI requests support for preparation of a large collection of vertebrate fossils recently recovered from the Central Transantarctic Mountains (CTAM) of Antarctica. These fossils will be used to place early Mesozoic Antarctic dinosaurs and other vertebrates into a global evolutionary, biogeographic, and faunal context; assess the degree of endemism in Triassic vertebrate faunas of Antarctica; constrain temporal relationships of the Triassic Antarctic vertebrate faunas; and refine the stratigraphic context for the Triassic Antarctic vertebrate assemblages to establish a paleoenvironmental framework. The lower and middle Triassic fossils offer a rare window on life in terrestrial environments at high-latitudes immediately after the Permian mass extinction.\n\nThe PI will use their fossils to educate the public about the geologic, climatic, and biologic history of Antarctica by visiting local schools. They will create and publish at least two new videos to the Burke Museum blog that relate the graduate student\u0027s experience of fieldwork in Antarctica. They will also update the Antarctica section on the UWBM \u0027Explore Your World\u0027 website with images and findings from their field season.\n", "east": 172.4, "geometry": ["POINT(167.405 -84.685)"], "keywords": "Antarctica; Biota; Fossil; Paleoclimate; Sample/Collection Description; Solid Earth; Transantarctic Mountains; Triassic", "locations": "Transantarctic Mountains; Antarctica", "north": -84.27, "nsf_funding_programs": null, "persons": "Sidor, Christian", "project_titles": "Preparation of Vertebrate Fossils from the Triassic of Antarctica", "projects": [{"proj_uid": "p0000418", "repository": "USAP-DC", "title": "Preparation of Vertebrate Fossils from the Triassic of Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -85.1, "title": "Preparation of Vertebrate Fossils from the Triassic of Antarctica", "uid": "600144", "west": 162.41}, {"awards": "1332492 Lohmann, Rainer", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Thu, 01 Jan 2015 00:00:00 GMT", "description": "Many persistent organic pollutants (POPs), though banned in the U.S. since the 1970s, remain in the environment and continue to reach hitherto pristine regions such as the Arctic and Antarctic. The overall goals of this RAPID project are to better understand the remobilization of POPs from melting glaciers in the Antarctic, and their transfer into the food-web. Legacy POPs have characteristic chemical signatures that will be used ascertain the origin of POPs in the Antarctic atmosphere and marine food-web. Samples that were collected in 2010 will be analyzed for a wide range of legacy POPs, and their behavior will be contrasted with results for emerging contaminants. The intellectual merit of the proposed research combines (a) the use of chemical signatures to assess whether melting glaciers are releasing legacy POPs back into the Antarctic marine ecosystem, and (b) a better understanding of the food-web dynamics of legacy POPs versus emerging organic pollutants.\n\nThe broader impacts of the proposed research project will include the training of the next generation of scientists through support for a graduate student and a postdoctoral scholar. As well, this work will result in a better understanding of the relationship between pollutants, trophic food web ecology and global climate change in the pristine Antarctic ecosystem.\n", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Animal Tracking; Antarctica; Antarctic Peninsula; Atmosphere; Biota; Chemistry:Fluid; Human Dimensions; McMurdo Sound; Oceans; Palmer Station; Pollution; Ross Sea; Sample/Collection Description; Seals; Southern Ocean; Weddell Sea", "locations": "Antarctic Peninsula; Weddell Sea; McMurdo Sound; Palmer Station; Ross Sea; Southern Ocean; Antarctica", "north": -60.0, "nsf_funding_programs": null, "persons": "Lohmann, Rainer", "project_titles": "RAPID: Origin of Persistent Organic Pollutants in the Antarctic Atmosphere, Snow and Marine Food WEB", "projects": [{"proj_uid": "p0000344", "repository": "USAP-DC", "title": "RAPID: Origin of Persistent Organic Pollutants in the Antarctic Atmosphere, Snow and Marine Food WEB"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Origin of Persistent Organic Pollutants in the Antarctic Atmosphere, Snow and Marine Food Web", "uid": "600138", "west": -180.0}, {"awards": "1043454 Kooyman, Gerald", "bounds_geometry": ["POLYGON((-172.642 -72.55,-170.9074 -72.55,-169.1728 -72.55,-167.4382 -72.55,-165.7036 -72.55,-163.969 -72.55,-162.2344 -72.55,-160.4998 -72.55,-158.7652 -72.55,-157.0306 -72.55,-155.296 -72.55,-155.296 -73.0743,-155.296 -73.5986,-155.296 -74.1229,-155.296 -74.6472,-155.296 -75.1715,-155.296 -75.6958,-155.296 -76.2201,-155.296 -76.7444,-155.296 -77.2687,-155.296 -77.793,-157.0306 -77.793,-158.7652 -77.793,-160.4998 -77.793,-162.2344 -77.793,-163.969 -77.793,-165.7036 -77.793,-167.4382 -77.793,-169.1728 -77.793,-170.9074 -77.793,-172.642 -77.793,-172.642 -77.2687,-172.642 -76.7444,-172.642 -76.2201,-172.642 -75.6958,-172.642 -75.1715,-172.642 -74.6472,-172.642 -74.1229,-172.642 -73.5986,-172.642 -73.0743,-172.642 -72.55))"], "date_created": "Thu, 01 Jan 2015 00:00:00 GMT", "description": "The emperor penguin dives deeper and longer, fasts longer, and endures the harshest weather conditions of all diving birds. It spends about four and half months per annum deep in Antarctic pack ice away from shore and stations, and thus is largely unavailable for study. This time includes preparation for the molt, and travel to the colony to breed, a time period in which great swings in body weight occur. This study will fill an important gap in what we know about the biology of the annual cycle of the emperor by examining the molt-post molt period. The P.I. proposes to traverse the Amundsen and Bellingshausen seas on the Oden, to locate and tag emperor penguins during the molt season. The objectives are to (1) Place satellite tags on 20 adult post molt birds to determine their route, rate of travel, and diving behavior as they return back to their breeding colonies, (2) Obtain an index of body condition, (3) Collect guano to determine the type of food consumed by emperor penguins in the region, (4) Conduct shipboard surveys to sight and plot the location and abundance of adult and juvenile birds on the ship\u0027s track. The PI hypothesizes that bird dives will be shallow during the initial post-molt phase, and that food will consist primarily of krill; that there will be differential dispersal of birds from the Ross Sea vs. Marie Byrd Land, with Ross Sea birds traveling farther; and that the greatest adult mortality occurs during the molt and early post molt period. Broader impacts include training of a post doc, a graduate student, and an aquarium volunteer. The P.I. also will present findings through a website, through public lectures, and in collaboration with the Birch aquarium.\n", "east": -155.296, "geometry": ["POINT(-163.969 -75.1715)"], "keywords": "Amundsen Sea; Biota; Oceans; Penguin; Sample/Collection Description; Southern Ocean", "locations": "Amundsen Sea; Southern Ocean", "north": -72.55, "nsf_funding_programs": null, "persons": "Kooyman, Gerald", "project_titles": "Pre and post molt biology of emperor penguins - Oden trans - Ross / Amundsen Sea cruise", "projects": [{"proj_uid": "p0000325", "repository": "USAP-DC", "title": "Pre and post molt biology of emperor penguins - Oden trans - Ross / Amundsen Sea cruise"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.793, "title": "Pre and Post Molt Biology of Emperor Penguins - Oden Trans - Ross / Amundsen Sea Cruise", "uid": "600149", "west": -172.642}, {"awards": "0632198 Anandakrishnan, Sridhar; 0732844 Anandakrishnan, Sridhar; 0758274 Parizek, Byron", "bounds_geometry": ["POLYGON((-110.06 -74.05,-109.582 -74.05,-109.104 -74.05,-108.626 -74.05,-108.148 -74.05,-107.67 -74.05,-107.192 -74.05,-106.714 -74.05,-106.236 -74.05,-105.758 -74.05,-105.28 -74.05,-105.28 -74.31,-105.28 -74.57,-105.28 -74.83,-105.28 -75.09,-105.28 -75.35,-105.28 -75.61,-105.28 -75.87,-105.28 -76.13,-105.28 -76.39,-105.28 -76.65,-105.758 -76.65,-106.236 -76.65,-106.714 -76.65,-107.192 -76.65,-107.67 -76.65,-108.148 -76.65,-108.626 -76.65,-109.104 -76.65,-109.582 -76.65,-110.06 -76.65,-110.06 -76.39,-110.06 -76.13,-110.06 -75.87,-110.06 -75.61,-110.06 -75.35,-110.06 -75.09,-110.06 -74.83,-110.06 -74.57,-110.06 -74.31,-110.06 -74.05))"], "date_created": "Mon, 03 Nov 2014 00:00:00 GMT", "description": "This data set consists of experimental output from a higher-order finite-element model that was utilized in conjunction with existing data sets to isolate essential physical processes affecting Thwaites Glacier (TG) in the Amundsen Sea Embayment (ASE) of West Antarctica.", "east": -105.28, "geometry": ["POINT(-107.67 -75.35)"], "keywords": "Amundsen Sea; Antarctica; Glaciers/Ice Sheet; Glaciology; Ice Sheet Model; Thwaites Glacier", "locations": "Thwaites Glacier; Amundsen Sea; Antarctica", "north": -74.05, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Parizek, Byron R.; Blankenship, Donald D.; Dupont, Todd K.; Holt, John W.", "project_titles": "Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System; IPY: Flow Dynamics of the Amundsen Sea Glaciers: Thwaites and Pine Island.", "projects": [{"proj_uid": "p0000174", "repository": "USAP-DC", "title": "Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System"}, {"proj_uid": "p0000699", "repository": "USAP-DC", "title": "IPY: Flow Dynamics of the Amundsen Sea Glaciers: Thwaites and Pine Island."}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -76.65, "title": "Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System", "uid": "609619", "west": -110.06}, {"awards": "0838937 Costa, Daniel", "bounds_geometry": ["POLYGON((162 -75,162.7 -75,163.4 -75,164.1 -75,164.8 -75,165.5 -75,166.2 -75,166.9 -75,167.6 -75,168.3 -75,169 -75,169 -75.3,169 -75.6,169 -75.9,169 -76.2,169 -76.5,169 -76.8,169 -77.1,169 -77.4,169 -77.7,169 -78,168.3 -78,167.6 -78,166.9 -78,166.2 -78,165.5 -78,164.8 -78,164.1 -78,163.4 -78,162.7 -78,162 -78,162 -77.7,162 -77.4,162 -77.1,162 -76.8,162 -76.5,162 -76.2,162 -75.9,162 -75.6,162 -75.3,162 -75))"], "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "Marine mammals of the Southern Ocean have evolved diverse life history patterns and foraging strategies to accommodate extreme fluctuations in the physical and biological environment. In light of ongoing climate change and the dramatic shifts in the extent and persistence of sea ice in the Ross Sea, it is critical to understand how Weddell seals, Leptonychotes weddellii, a key apex predator, select and utilize foraging habitats. Recent advances in satellite-linked animal-borne conductivity, temperature and depth (CTD) tags make it possible to simultaneously collect data on seal locations, their diving patterns, and the temperature and salinity profiles of the water columns they utilize. In other ecosystems, such data have revealed that marine predators selectively forage in areas where currents and fronts serve to locally concentrate prey resources, and that these conditions are required to sustain populations. Weddell seals will be studied in McMurdo Sound and at Terra Nova Bay, Ross Sea and will provide the first new data on Weddell seal winter diving behavior and habitat use in almost two decades. The relationship between an animal\u0027s diving behavior and physical habitat has enormous potential to enhance monitoring studies and to provide insight into how changes in ice conditions (due either to warming or the impact of large icebergs, such as B15) might impact individual time budgets and foraging success. The second thrust of this project is to use the profiles obtained from CTD seal tags to model the physical oceanography of this region. Current mathematical models of physical oceanographic processes in the Southern Ocean are directed at better understanding the role that it plays in global climate processes, and the linkages between physical and biological oceanographic processes. However, these efforts are limited by the scarcity of oceanographic data at high latitudes in the winter months; CTD tags deployed on animals will collect data at sufficient spatial and temporal resolution to improve data density. The project will contribute to two IPY endorsed initiatives: MEOP (Marine Mammals as Explorers of the Ocean Pole to Pole) and CAML (Census of Antarctic Marine Life). In addition, the highly visual nature of the data and analysis lends itself to public and educational display and outreach, particularly as they relate to global climate change, and we have collaborations with undergraduate and graduate training programs, the Seymour Marine Discovery Center, and the ARMADA program to foster these broader impacts.\n", "east": 169.0, "geometry": ["POINT(165.5 -76.5)"], "keywords": "Antarctica; Biota; Oceans; Ross Sea; Southern Ocean", "locations": "Ross Sea; Southern Ocean; Antarctica", "north": -75.0, "nsf_funding_programs": null, "persons": "Costa, Daniel", "project_titles": "Collaborative Research: Weddell seals as autonomous sensors of the winter oceanography of the Ross Sea", "projects": [{"proj_uid": "p0000661", "repository": "USAP-DC", "title": "Collaborative Research: Weddell seals as autonomous sensors of the winter oceanography of the Ross Sea"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Weddell seals as autonomous sensors of the winter oceanography of the Ross Sea", "uid": "600025", "west": 162.0}, {"awards": "1139739 Hansen, Samantha", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "Intellectual Merit: Numerous candidate models for the geologic processes that have shaped the Antarctic continent have been proposed. To discriminate between them, detailed images of the upper mantle structure are required; however, the only existing continental-scale images of seismic structure beneath Antarctica lack sufficient resolution to delineate important, diagnostic features. Using newly available data from various Antarctic seismic networks, the PI will employ the adaptively parameterized tomography method to develop a high-resolution, continental-scale seismic velocity model for all of Antarctica. The proposed tomography method combines regional seismic travel-time datasets in the context of a global model to create a composite continental-scale model of upper mantle structure. The proposed method allows for imaging of finer structure in areas with better seismic ray coverage while simultaneously limiting the resolution of features in regions with less coverage. This research will help advance understanding of important global processes, such as craton formation, mountain building, continental rifting and associated magmatism. Additionally, the proposed research will have important impacts on other fields of Antarctic science. Constraints provided by tomographic results can be used to develop thermal models of the lithosphere needed to characterize the history and dynamics of ice sheets. Also, further constraints on lithospheric structure are required by climate-ice models, which are focused on understanding the cooling history of the Antarctic continent.\n\nBroader impacts: The PI is a new faculty member at the University of Alabama after having been funded as a National Science Foundation Postdoctoral Fellow in Polar Regions Research. The graduate student supported by this project is new to polar research. Through the UA-Tuscaloosa Magnet School partnership program, the PI will educate K-12 students about the Antarctic environment and associated career opportunities through various online and hands-on activities. University of Alabama dedicates a significant percentage of its enrollment space to underrepresented groups.\n", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Geology/Geophysics - Other; Lithosphere; Seismic Tomography; Solid Earth", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": null, "persons": "Hansen, Samantha", "project_titles": "New Approach to Investigate the Seismic Velocity Structure beneath Antarctica", "projects": [{"proj_uid": "p0000354", "repository": "USAP-DC", "title": "New Approach to Investigate the Seismic Velocity Structure beneath Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "A New Approach to Investigate the Seismic Velocity Structure beneath Antarctica", "uid": "600132", "west": -180.0}, {"awards": "0944220 Ponganis, Paul", "bounds_geometry": ["POLYGON((-160 -68,-159 -68,-158 -68,-157 -68,-156 -68,-155 -68,-154 -68,-153 -68,-152 -68,-151 -68,-150 -68,-150 -69,-150 -70,-150 -71,-150 -72,-150 -73,-150 -74,-150 -75,-150 -76,-150 -77,-150 -78,-151 -78,-152 -78,-153 -78,-154 -78,-155 -78,-156 -78,-157 -78,-158 -78,-159 -78,-160 -78,-160 -77,-160 -76,-160 -75,-160 -74,-160 -73,-160 -72,-160 -71,-160 -70,-160 -69,-160 -68))"], "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "Emperor penguins (Aptenodytes forsteri) and leopard seals (Hydrurga leptonyx) are iconic, top predators in Antarctica. Understanding their physiological ecology is essential to the assessment of their adaptability to the threats of climate change, pollution, and overfishing. The proposed research has multipronged objectives. Prior results suggest that Emperor penguins have flexible (vs. static) aerobic dive limits (ADL) that vary with the type of dive, and that the role of heart rate in utilization of oxygen stores also varies with dive type. A series of physiological measurements are proposed with backpack electrocardiogram recorders, that will allow further delineation of patterns and interrelationships among heart rate, dive behavior, and oxygen stores. Importantly, the research will be done on free diving emperors, and not individuals confined to a dive hole, thereby providing a more genuine measure of diving physiology and behavior. A separate objective is to examine foraging behavior of leopard seals, using a backpack digital camera and time depth recorder. Leopard seal behavior and prey intake is poorly quantified, but known to be significant. Accordingly the research is somewhat exploratory but will provide important baseline data. Finally, the P.I. proposes to continue long term overflight censuses of Emperor penguin colonies in the Ross Sea. Broader impacts include collaboration with National Geographic television, graduate student training, and development of sedation techniques for leopard seals.\n", "east": -150.0, "geometry": ["POINT(-155 -73)"], "keywords": "Antarctica; Biota; Electrocardiogram ; Penguin; Southern Ocean", "locations": "Antarctica; Southern Ocean", "north": -68.0, "nsf_funding_programs": null, "persons": "Ponganis, Paul", "project_titles": "The Physiological Ecology of Two Antarctic Icons: Emperor Penguins and Leopard Seals", "projects": [{"proj_uid": "p0000349", "repository": "USAP-DC", "title": "The Physiological Ecology of Two Antarctic Icons: Emperor Penguins and Leopard Seals"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "The Physiological Ecology of Two Antarctic Icons: Emperor Penguins and Leopard Seals", "uid": "600113", "west": -160.0}, {"awards": "1244253 Hammer, William", "bounds_geometry": ["POLYGON((-165 -85,-164.5 -85,-164 -85,-163.5 -85,-163 -85,-162.5 -85,-162 -85,-161.5 -85,-161 -85,-160.5 -85,-160 -85,-160 -85.2,-160 -85.4,-160 -85.6,-160 -85.8,-160 -86,-160 -86.2,-160 -86.4,-160 -86.6,-160 -86.8,-160 -87,-160.5 -87,-161 -87,-161.5 -87,-162 -87,-162.5 -87,-163 -87,-163.5 -87,-164 -87,-164.5 -87,-165 -87,-165 -86.8,-165 -86.6,-165 -86.4,-165 -86.2,-165 -86,-165 -85.8,-165 -85.6,-165 -85.4,-165 -85.2,-165 -85))"], "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "This proposal requests support for research on Early Jurassic vertebrate fauna of the Beardmore Glacier region of Antarctica. The project will support preparation and systematic and paleobiological research on four Antarctic dinosaurs, including two new species, collected in the Central Transantarctic Mountains. With the new material Cryolophosaurus will become one of the most complete Early Jurassic theropods known, and thus has the potential to become a keystone taxon for resolving the debated early evolutionary history of theropod dinosaurs, the group that gave rise to birds. Two new dinosaur specimens include a nearly complete articulated skeleton of a juvenile sauropodomorph, and the articulated hip region of another small individual. Both appear to be new taxa. The dinosaurs from the Hanson Formation represent some of the highest paleolatitude vertebrates known from the Jurassic. The PIs will generate CT datasets for Cryolophosaurus and the more complete new sauropodomorph species to mine for phylogenetic trait information, and to investigate their comparative neuroanatomy and feeding behavior. Histological datasets will be generated from multiple skeletal elements for all four Mt. Kirkpatrick taxa to understand patterns of growth in different clades of polar dinosaurs and compare them to relatives from lower paleolatitudes. This paleohistological study of a relatively diverse sample of sauropodomorph taxa from Antarctica may contribute to determining whether and how these dinosaurs responded to contemporary climatic extremes.\n\nThe PIs have established a successful undergraduate training program as part of previous research. Summer interns from Augustana are trained at the Field Museum in specimen preparation, curation, molding/casting, and histological sampling. They also participate in existing Field Museum REU programs, including a course on phylogenetic systematics. Four undergraduate internships and student research projects will be supported through this proposal. The PIs will develop a traveling exhibit on Antarctic Mesozoic paleontology that they estimate will be seen by 2.5 million people over the five-year tour.\n", "east": -160.0, "geometry": ["POINT(-162.5 -86)"], "keywords": "Antarctica; Beardmore Glacier; Biota; Dinosaurs; Fossil; Transantarctic Mountains", "locations": "Beardmore Glacier; Transantarctic Mountains; Antarctica", "north": -85.0, "nsf_funding_programs": null, "persons": "Hammer, William R.", "project_titles": "Collaborative Research: Continued Research on the Jurassic Vertebrate Fauna from the Beardmore Glacier Region of Antarctica", "projects": [{"proj_uid": "p0000083", "repository": "USAP-DC", "title": "Collaborative Research: Continued Research on the Jurassic Vertebrate Fauna from the Beardmore Glacier Region of Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -87.0, "title": "Continued Research on the Jurassic Vertebrate Fauna from the Beardmore Glacier Region of Antarctica", "uid": "600173", "west": -165.0}, {"awards": "1019305 Grim, Jeffrey", "bounds_geometry": null, "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "Survival of Antarctic notothenioid fishes in the context of global climate change will depend upon the impact of rising oceanic temperatures on their embryonic development, yet little is known regarding the molecular mechanisms underlying this complex suite of processes. Many notothenioids are characterized by secondary pelagicism, which enables them to exploit food sources in the water column and is supported in part by skeletal pedomorphism. Here the PI proposes to examine the hypothesis that reactive oxygen species (ROS) regulate notothenioid skeletal pedomorphism. The research objectives are : 1) To quantify and localize ROS production and identify the point(s) of origin of ROS production in embryonic Antarctic fishes that differ in skeletal phenotypes 2) To determine whether the time course of embryogenesis and the extent of osteological development in embryonic Antarctic fishes can be altered by changing the oxidative status of the animal during embryogenesis 3) To evaluate whether transgenic alteration of oxidative status can induce skeletal pedomorphism in a fish model. Broader Impacts will include teaching undergraduate lectures, recruiting undergraduate students to help with lab analyses (and possibly field work), lectures and demonstrations to high school students, and allowing secondary educators access to personal photos and videos of research animals for curriculum development.", "east": null, "geometry": null, "keywords": "Biota; Fish Logs; LMG1203; LMG1204; LMG1205; Oceans; Pot; Southern Ocean; Trawl", "locations": "Southern Ocean", "north": null, "nsf_funding_programs": null, "persons": "Grim, Jeffrey", "project_titles": "PostDoctoral Research Fellowship", "projects": [{"proj_uid": "p0000482", "repository": "USAP-DC", "title": "PostDoctoral Research Fellowship"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Impact of Rising Oceanic Temperatures on the Embryonic Development of Antarctic Notothenioid Fishes", "uid": "600119", "west": null}, {"awards": "0732983 Vernet, Maria", "bounds_geometry": ["POLYGON((-66 -62,-65.3 -62,-64.6 -62,-63.9 -62,-63.2 -62,-62.5 -62,-61.8 -62,-61.1 -62,-60.4 -62,-59.7 -62,-59 -62,-59 -62.8,-59 -63.6,-59 -64.4,-59 -65.2,-59 -66,-59 -66.8,-59 -67.6,-59 -68.4,-59 -69.2,-59 -70,-59.7 -70,-60.4 -70,-61.1 -70,-61.8 -70,-62.5 -70,-63.2 -70,-63.9 -70,-64.6 -70,-65.3 -70,-66 -70,-66 -69.2,-66 -68.4,-66 -67.6,-66 -66.8,-66 -66,-66 -65.2,-66 -64.4,-66 -63.6,-66 -62.8,-66 -62))"], "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach - Marine Ecosystems. A profound transformation in ecosystem structure and function is occurring in coastal waters of the western Weddell Sea, with the collapse of the Larsen B ice shelf. This transformation appears to be yielding a redistribution of energy flow between chemoautotrophic and photosynthetic production, and to be causing the rapid demise of the extraordinary seep ecosystem discovered beneath the ice shelf. This event provides an ideal opportunity to examine fundamental aspects of ecosystem transition associated with climate change. We propose to test the following hypotheses to elucidate the transformations occurring in marine ecosystems as a consequence of the Larsen B collapse: (1) The biogeographic isolation and sub-ice shelf setting of the Larsen B seep has led to novel habitat characteristics, chemoautotrophically dependent taxa and functional adaptations. (2) Benthic communities beneath the former Larsen B ice shelf are fundamentally different from assemblages at similar depths in the Weddell sea-ice zone, and resemble oligotrophic deep-sea communities. Larsen B assemblages are undergoing rapid change. (3) The previously dark, oligotrophic waters of the Larsen B embayment now support a thriving phototrophic community, with production rates and phytoplankton composition similar to other productive areas of the Weddell Sea. To document rapid changes occurring in the Larsen B ecosystem, we will use a remotely operated vehicle, shipboard samplers, and moored sediment traps. We will characterize microbial, macrofaunal and megafaunal components of the seep community; evaluate patterns of surface productivity, export flux, and benthic faunal composition in areas previously covered by the ice shelf, and compare these areas to the open sea-ice zone. These changes will be placed within the geological, glaciological and climatological context that led to ice-shelf retreat, through companion research projects funded in concert with this effort. Together these projects will help predict the likely consequences of ice-shelf collapse to marine ecosystems in other regions of Antarctica vulnerable to climate change. The research features international collaborators from Argentina, Belgium, Canada, Germany, Spain and the United Kingdom. The broader impacts include participation of a science writer; broadcast of science segments by members of the Jim Lehrer News Hour (Public Broadcasting System); material for summer courses in environmental change; mentoring of graduate students and postdoctoral fellows; and showcasing scientific activities and findings to students and public through podcasts.\n", "east": -59.0, "geometry": ["POINT(-62.5 -66)"], "keywords": "Antarctica; Antarctic Peninsula; Araon1304; Biota; LARISSA; Larsen B Ice Shelf; NBP1001; NBP1203; Oceans; Physical Oceanography; Southern Ocean; Weddell Sea", "locations": "Antarctic Peninsula; Weddell Sea; Larsen B Ice Shelf; Southern Ocean; Antarctica", "north": -62.0, "nsf_funding_programs": null, "persons": "Vernet, Maria", "project_titles": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans", "projects": [{"proj_uid": "p0000101", "repository": "USAP-DC", "title": "Collaborative Research in IPY: Abrupt Environmental Change in the Larsen Ice Shelf System, a Multidisciplinary Approach -- Cryosphere and Oceans"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "LARISSA", "south": -70.0, "title": "Abrupt Environmental Change in the Larsen Ice Shelf System (LARISSA) - Marine Ecosystems", "uid": "600073", "west": -66.0}, {"awards": "0732804 McPhee, Miles", "bounds_geometry": ["POINT(166.25 -77.42)"], "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "The Office of Polar Programs, Antarctic Integrated and System Science Program has made this award to support an interdisciplinary study of the effects of the ocean on the stability of glacial ice in the most dynamic region the West Antarctic Ice Sheet, namely the Pine Island Glacier in the Amundsen Sea Embayment. The collaborative project builds on the knowledge gained by the highly successful West Antarctic Ice Sheet program and is being jointly sponsored with NASA. Recent observations indicate a significant ice loss, equivalent to 10% of the ongoing increase in sea-level rise, in this region. These changes are largest along the coast and propagate rapidly inland, indicating the critical impact of the ocean on ice sheet stability in the region. While a broad range of remote sensing and ground-based instrumentation is available to characterize changes of the ice surface and internal structure (deformation, ice motion, melt) and the shape of the underlying sediment and rock bed, instrumentation has yet to be successfully deployed for observing boundary layer processes of the ocean cavity which underlies the floating ice shelf and where rapid melting is apparently occurring. Innovative, mini ocean sensors that can be lowered through boreholes in the ice shelf (about 500 m thick) will be developed and deployed to automatically provide ocean profiling information over at least three years. Their data will be transmitted through a conducting cable frozen in the borehole to the surface where it will be further transmitted via satellite to a laboratory in the US. Geophysical and remote sensing methods (seismic, GPS, altimetry, stereo imaging, radar profiling) will be applied to map the geometry of the ice shelf, the shape of the sub ice-shelf cavity, the ice surface geometry and deformations within the glacial ice. To integrate the seismic, glaciological and oceanographic observations, a new 3-dimensional coupled ice-ocean model is being developed which will be the first of its kind. NASA is supporting satellite based research and the deployment of a robotic-camera system to explore the environment in the ocean cavity underlying the ice shelf and NSF is supporting all other aspects of this study. \n\nBroader impacts: This project is motivated by the potential societal impacts of rapid sea level rise and should result in critically needed improvements in characterizing and predicting the behavior of coupled ocean-ice systems. It is a contribution to the International Polar Year and was endorsed by the International Council for Science as a component of the \u0027Multidisciplinary Study of the Amundsen Sea Embayment\u0027 proposal #258 of the honeycomb of endorsed IPY activities. The research involves substantial international partnerships with the British Antarctic Survey and the University of Bristol in the UK. The investigators will partner with the previously funded \u0027Polar Palooza\u0027 education and outreach program in addition to undertaking a diverse set of outreach activities of their own. Eight graduate students and one undergraduate as well as one post doc will be integrated into this research project.\n", "east": 166.25, "geometry": ["POINT(166.25 -77.42)"], "keywords": "Antarctica; Atmosphere; McMurdo; Meteorology; Oceans; Ross Island; Southern Ocean", "locations": "McMurdo; Ross Island; Southern Ocean; Antarctica", "north": -77.42, "nsf_funding_programs": null, "persons": "McPhee, Miles G.", "project_titles": "Collaborative Research; IPY: Ocean-Ice Interaction in the Amundsen Sea sector of West Antarctica", "projects": [{"proj_uid": "p0000043", "repository": "USAP-DC", "title": "Collaborative Research; IPY: Ocean-Ice Interaction in the Amundsen Sea sector of West Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.42, "title": "Ocean-Ice Interaction in the Amundsen Sea Sector of West Antarctica", "uid": "600072", "west": 166.25}, {"awards": "0838970 Foreman, Christine", "bounds_geometry": ["POINT(161.667 -77.117)"], "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "Dissolved organic matter (DOM) comprises a significant pool of Earth\u0027s organic carbon that dwarfs the amount present in living aquatic organisms. The properties and reactivity of DOM are not well defined, and the evolution of autochthonous DOM from its precursor materials in freshwater has not been observed. Recent sampling of a supraglacial stream formed on the Cotton Glacier in the Transantarctic Mountains revealed DOM that more closely resembles an assemblage of recognizable precursor organic compounds, based upon its UV-VIS and fluorescence spectra. It is suggested that the DOM from this water evolved over time to resemble materials present in marine and many inland surface waters. The transient nature of the system i.e., it reforms seasonally, also prevents any accumulation of the refractory DOM present in most surface waters. Thus, the Cotton Glacier provides us with a unique environment to study the formation of DOM from precursor materials. An interdisciplinary team will study the biogeochemistry of this progenitor DOM and how microbes modify it. By focusing on the chemical composition of the DOM as it shifts from precursor material to the more humified fractions, the investigators will relate this transition to bioavailability, enzymatic activity, community composition and microbial growth efficiency. This project will support education at all levels, K-12, high school, undergraduate, graduate and post-doc and will increase participation by under-represented groups in science. Towards these goals, the investigators have established relationships with girls\u0027 schools and Native American programs. Additional outreach will be carried out in coordination with PolarTREC, PolarPalooza, and if possible, an Antarctic Artist and Writer.\n", "east": 161.667, "geometry": ["POINT(161.667 -77.117)"], "keywords": "Antarctica; Biota; Glaciers/Ice Sheet; Glaciology; Microbiology", "locations": "Antarctica", "north": -77.117, "nsf_funding_programs": null, "persons": "Foreman, Christine", "project_titles": "Collaborative Research: The Biogeochemical Evolution of Dissolved Organic Matter in a Fluvial System on the Cotton Glacier, Antarctica", "projects": [{"proj_uid": "p0000458", "repository": "USAP-DC", "title": "Collaborative Research: The Biogeochemical Evolution of Dissolved Organic Matter in a Fluvial System on the Cotton Glacier, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.117, "title": "The Biogeochemical Evolution of Dissolved Organic Matter in a Fluvial System on the Cotton Glacier, Antarctica", "uid": "600104", "west": 161.667}, {"awards": "0838955 Gast, Rebecca", "bounds_geometry": ["POLYGON((71.504166 -76.159164,71.5142214 -76.159164,71.5242768 -76.159164,71.5343322 -76.159164,71.5443876 -76.159164,71.554443 -76.159164,71.5644984 -76.159164,71.5745538 -76.159164,71.5846092 -76.159164,71.5946646 -76.159164,71.60472 -76.159164,71.60472 -76.2018032,71.60472 -76.2444424,71.60472 -76.2870816,71.60472 -76.3297208,71.60472 -76.37236,71.60472 -76.4149992,71.60472 -76.4576384,71.60472 -76.5002776,71.60472 -76.5429168,71.60472 -76.585556,71.5946646 -76.585556,71.5846092 -76.585556,71.5745538 -76.585556,71.5644984 -76.585556,71.554443 -76.585556,71.5443876 -76.585556,71.5343322 -76.585556,71.5242768 -76.585556,71.5142214 -76.585556,71.504166 -76.585556,71.504166 -76.5429168,71.504166 -76.5002776,71.504166 -76.4576384,71.504166 -76.4149992,71.504166 -76.37236,71.504166 -76.3297208,71.504166 -76.2870816,71.504166 -76.2444424,71.504166 -76.2018032,71.504166 -76.159164))"], "date_created": "Tue, 01 Jan 2013 00:00:00 GMT", "description": "This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).\n\nMost organisms meet their carbon and energy needs using photosynthesis (phototrophy) or ingestion/assimilation of organic substances (heterotrophy). However, a nutritional strategy that combines phototrophy and heterotrophy - mixotrophy - is geographically and taxonomically widespread in aquatic systems. While the presence of mixotrophs in the Southern Ocean is known only recently, preliminary evidence indicates a significant role in Southern Ocean food webs. Recent work on Southern Ocean dinoflagellate, Kleptodinium, suggests that it sequesters functional chloroplasts of the bloom-forming haptophyte, Phaeocystis antarctica. This dinoflagellate is abundant in the Ross Sea, has been reported elsewhere in the Southern Ocean, and may have a circumpolar distribution. By combining nutritional modes. mixotrophy may offer competitive advantages over pure autotrophs and heterotrophs.\n\nThe goals of this project are to understand the importance of alternative nutritional strategies for Antarctic species that combine phototrophic and phagotrophic processes in the same organism. The research will combine field investigations of plankton and ice communities in the Southern Ocean with laboratory experiments on Kleptodinium and recently identified mixotrophs from our Antarctic culture collections. The research will address: 1) the relative contributions of phototrophy and phagotrophy in Antarctic mixotrophs; 2) the nature of the relationship between Kleptodinium and its kleptoplastids; 3) the distributions and abundances of mixotrophs and Kleptodinium in the Southern Ocean during austral spring/summer; and 4) the impacts of mixotrophs and Kleptodinium on prey populations, the factors influencing these behaviors and the physiological conditions of these groups in their natural environment. \n\nThe project will contribute to the maintenance of a culture collection of heterotrophic, phototrophic and mixotrophic Antarctic protists that are available to the scientific community, and it will train graduate and undergraduate students at Temple University. Research findings and activities will be summarized for non-scientific audiences through the PIs\u0027 websites and through other public forums, and will involve middle school teachers via collaboration with COSEE-New England.\n", "east": 71.60472, "geometry": ["POINT(71.554443 -76.37236)"], "keywords": "Biota; Microbiology; NBP0305; NBP0405; NBP0508; NBP1101; Oceans; Southern Ocean", "locations": "Southern Ocean", "north": -76.159164, "nsf_funding_programs": null, "persons": "Gast, Rebecca", "project_titles": "Collaborative Research: Alternative Nutritional Strategies in Antarctic Protists", "projects": [{"proj_uid": "p0000490", "repository": "USAP-DC", "title": "Collaborative Research: Alternative Nutritional Strategies in Antarctic Protists"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -76.585556, "title": "Alternative Nutritional Strategies in Antarctic Protists", "uid": "600103", "west": 71.504166}, {"awards": "0838892 Burns, Jennifer", "bounds_geometry": ["POLYGON((162 -75,162.7 -75,163.4 -75,164.1 -75,164.8 -75,165.5 -75,166.2 -75,166.9 -75,167.6 -75,168.3 -75,169 -75,169 -75.3,169 -75.6,169 -75.9,169 -76.2,169 -76.5,169 -76.8,169 -77.1,169 -77.4,169 -77.7,169 -78,168.3 -78,167.6 -78,166.9 -78,166.2 -78,165.5 -78,164.8 -78,164.1 -78,163.4 -78,162.7 -78,162 -78,162 -77.7,162 -77.4,162 -77.1,162 -76.8,162 -76.5,162 -76.2,162 -75.9,162 -75.6,162 -75.3,162 -75))"], "date_created": "Tue, 01 Jan 2013 00:00:00 GMT", "description": "Marine mammals of the Southern Ocean have evolved diverse life history patterns and foraging strategies to accommodate extreme fluctuations in the physical and biological environment. In light of ongoing climate change and the dramatic shifts in the extent and persistence of sea ice in the Ross Sea, it is critical to understand how Weddell seals, Leptonychotes weddellii, a key apex predator, select and utilize foraging habitats. Recent advances in satellite-linked animal-borne conductivity, temperature and depth (CTD) tags make it possible to simultaneously collect data on seal locations, their diving patterns, and the temperature and salinity profiles of the water columns they utilize. In other ecosystems, such data have revealed that marine predators selectively forage in areas where currents and fronts serve to locally concentrate prey resources, and that these conditions are required to sustain populations. Weddell seals will be studied in McMurdo Sound and at Terra Nova Bay, Ross Sea and will provide the first new data on Weddell seal winter diving behavior and habitat use in almost two decades. The relationship between an animal\u0027s diving behavior and physical habitat has enormous potential to enhance monitoring studies and to provide insight into how changes in ice conditions (due either to warming or the impact of large icebergs, such as B15) might impact individual time budgets and foraging success. The second thrust of this project is to use the profiles obtained from CTD seal tags to model the physical oceanography of this region. Current mathematical models of physical oceanographic processes in the Southern Ocean are directed at better understanding the role that it plays in global climate processes, and the linkages between physical and biological oceanographic processes. However, these efforts are limited by the scarcity of oceanographic data at high latitudes in the winter months; CTD tags deployed on animals will collect data at sufficient spatial and temporal resolution to improve data density. The project will contribute to two IPY endorsed initiatives: MEOP (Marine Mammals as Explorers of the Ocean Pole to Pole) and CAML (Census of Antarctic Marine Life). In addition, the highly visual nature of the data and analysis lends itself to public and educational display and outreach, particularly as they relate to global climate change, and we have collaborations with undergraduate and graduate training programs, the Seymour Marine Discovery Center, and the ARMADA program to foster these broader impacts.", "east": 169.0, "geometry": ["POINT(165.5 -76.5)"], "keywords": "Biota; Oceans; Ross Sea; Seals; Southern Ocean", "locations": "Ross Sea; Southern Ocean", "north": -75.0, "nsf_funding_programs": null, "persons": "Burns, Jennifer", "project_titles": "Collaborative Research: Weddell seals as autonomous sensors of the winter oceanography of the Ross Sea", "projects": [{"proj_uid": "p0000661", "repository": "USAP-DC", "title": "Collaborative Research: Weddell seals as autonomous sensors of the winter oceanography of the Ross Sea"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Weddell seals as autonomous sensors of the winter oceanography of the Ross Sea", "uid": "600101", "west": 162.0}, {"awards": "0636724 Blankenship, Donald", "bounds_geometry": ["POLYGON((-120 -75,-117 -75,-114 -75,-111 -75,-108 -75,-105 -75,-102 -75,-99 -75,-96 -75,-93 -75,-90 -75,-90 -75.5,-90 -76,-90 -76.5,-90 -77,-90 -77.5,-90 -78,-90 -78.5,-90 -79,-90 -79.5,-90 -80,-93 -80,-96 -80,-99 -80,-102 -80,-105 -80,-108 -80,-111 -80,-114 -80,-117 -80,-120 -80,-120 -79.5,-120 -79,-120 -78.5,-120 -78,-120 -77.5,-120 -77,-120 -76.5,-120 -76,-120 -75.5,-120 -75))"], "date_created": "Mon, 21 May 2012 00:00:00 GMT", "description": "This data set contains subglacial water flow paths beneath Thwaites Glacier, West Antarctica, interpreted from ice thickness and bed elevation measurements collected between 7 December 2004 and 31 January 2005 by the Airborne Geophysical Survey of the Amundsen Embayment (AGASEA) expedition. Data consist of an ASCII text file with geographical coordinates, hydraulic head, and bed and surface elevations, and a corresponding .pdf map.\n\nData are available via FTP.", "east": -90.0, "geometry": ["POINT(-105 -77.5)"], "keywords": "AGASEA; Airborne Radar; Antarctica; Elevation; Flow Paths; Glaciers/Ice Sheet; Glaciology; Thwaites Glacier", "locations": "Thwaites Glacier; Antarctica", "north": -75.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Carter, Sasha P.; Young, Duncan A.; Blankenship, Donald D.", "project_titles": "Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System", "projects": [{"proj_uid": "p0000174", "repository": "USAP-DC", "title": "Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.0, "title": "Subglacial water flow paths under Thwaites Glacier, West Antarctica", "uid": "609518", "west": -120.0}, {"awards": "0636724 Blankenship, Donald", "bounds_geometry": ["POLYGON((-125 -73,-121.5 -73,-118 -73,-114.5 -73,-111 -73,-107.5 -73,-104 -73,-100.5 -73,-97 -73,-93.5 -73,-90 -73,-90 -74,-90 -75,-90 -76,-90 -77,-90 -78,-90 -79,-90 -80,-90 -81,-90 -82,-90 -83,-93.5 -83,-97 -83,-100.5 -83,-104 -83,-107.5 -83,-111 -83,-114.5 -83,-118 -83,-121.5 -83,-125 -83,-125 -82,-125 -81,-125 -80,-125 -79,-125 -78,-125 -77,-125 -76,-125 -75,-125 -74,-125 -73))"], "date_created": "Thu, 03 May 2012 00:00:00 GMT", "description": "This data set contains line-based radar-derived ice thickness and bed elevation data, collected as part of the Airborne Geophysical Survey of the Amundsen Embayment (AGASEA) expedition, which took place over Thwaites Glacier in West Antarctica from 2004 to 2005. The data set includes ice thickness, ice sheet bed elevation, and ice sheet surface elevation, derived from ice-penetrating radar and aircraft GPS positions. The data are spaced on a 15 km by 15 km grid over the entire catchment of the glacier, and sampled at approximately 15 meters along track. Most of the radar data used for this dataset has been processed using a 1-D focusing algorithm, to reduce the along track resolution to tens of meters, to improve boundary conditions for ice sheet models. \n\nData are available via FTP in space-delimited ASCII format.", "east": -90.0, "geometry": ["POINT(-107.5 -78)"], "keywords": "AGASEA; Airborne Radar; Amundsen Sea; Antarctica; Elevation; Glaciers/Ice Sheet; Glaciology; Ice Thickness", "locations": "Amundsen Sea; Antarctica", "north": -73.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Blankenship, Donald D.; Young, Duncan A.; Holt, John W.; Kempf, Scott D.", "project_titles": "Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System", "projects": [{"proj_uid": "p0000174", "repository": "USAP-DC", "title": "Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -83.0, "title": "AGASEA Ice Thickness Profile Data from the Amundsen Sea Embayment, Antarctica", "uid": "609517", "west": -125.0}, {"awards": "0528728 Vernet, Maria", "bounds_geometry": ["POLYGON((-69.08 -64.8,-68.632 -64.8,-68.184 -64.8,-67.736 -64.8,-67.288 -64.8,-66.84 -64.8,-66.392 -64.8,-65.944 -64.8,-65.496 -64.8,-65.048 -64.8,-64.6 -64.8,-64.6 -65.121,-64.6 -65.442,-64.6 -65.763,-64.6 -66.084,-64.6 -66.405,-64.6 -66.726,-64.6 -67.047,-64.6 -67.368,-64.6 -67.689,-64.6 -68.01,-65.048 -68.01,-65.496 -68.01,-65.944 -68.01,-66.392 -68.01,-66.84 -68.01,-67.288 -68.01,-67.736 -68.01,-68.184 -68.01,-68.632 -68.01,-69.08 -68.01,-69.08 -67.689,-69.08 -67.368,-69.08 -67.047,-69.08 -66.726,-69.08 -66.405,-69.08 -66.084,-69.08 -65.763,-69.08 -65.442,-69.08 -65.121,-69.08 -64.8))"], "date_created": "Sat, 01 Jan 2011 00:00:00 GMT", "description": "This collaborative study between the Desert Research Institute, the University of California, Santa Barbara (0529087; Robin Ross), and the University of California, San Diego (0528728; Maria Vernet) will examine the relationship between sea ice extent along the Antarctic Peninsula and the life history of krill (Euphausia superba), by developing, refining, and linking diagnostic datasets and models of phytoplankton decreases in the fall, phytoplankton biomass incorporation into sea ice, sea ice growth dynamics, sea ice algal production and biomass accumulation, and larval krill energetics, condition, and survival. Krill is a key species in the food web of the Southern Ocean ecosystem, and one that is intricately involved with seasonal sea ice dynamics. Results from the Southern Ocean experiment of the Global Ocean Ecosystems Dynamics program (SO-Globec) field work as well as historical information on sea ice dynamics and krill recruitment suggest a shift in the paradigm that all pack ice is equally good krill habitat. SO-Globec is a multidisciplinary effort focused on understanding the physical and biological factors that influence growth, reproduction, recruitment and survival of Antarctic krill (Euphausia superba). The program uses a multi-trophic level approach that includes the predators and competitors of Antarctic krill, represented by other zooplankton, fish, penguins, seals, and cetaceans. This collaborative project is concerned with the synthesis and modeling of lower trophic levels.", "east": -64.6, "geometry": ["POINT(-66.84 -66.405)"], "keywords": "Bellingshausen Sea; Biota; Oceans; Phytoplankton; Southern Ocean", "locations": "Bellingshausen Sea; Southern Ocean", "north": -64.8, "nsf_funding_programs": null, "persons": "Vernet, Maria", "project_titles": "Collaborative Research: U.S. SO GLOBEC Synthesis and Modeling: Timing is Everything: The Dynamic Coupling among Phytoplankton, Ice, Ice Algae and Krill (PIIAK)", "projects": [{"proj_uid": "p0000522", "repository": "USAP-DC", "title": "Collaborative Research: U.S. SO GLOBEC Synthesis and Modeling: Timing is Everything: The Dynamic Coupling among Phytoplankton, Ice, Ice Algae and Krill (PIIAK)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -68.01, "title": "The Dynamic Coupling among Phytoplankton, Ice, Ice Algae and Krill (PIIAK)", "uid": "600048", "west": -69.08}, {"awards": "0529087 Ross, Robin", "bounds_geometry": ["POLYGON((-71 -61,-70 -61,-69 -61,-68 -61,-67 -61,-66 -61,-65 -61,-64 -61,-63 -61,-62 -61,-61 -61,-61 -61.9,-61 -62.8,-61 -63.7,-61 -64.6,-61 -65.5,-61 -66.4,-61 -67.3,-61 -68.2,-61 -69.1,-61 -70,-62 -70,-63 -70,-64 -70,-65 -70,-66 -70,-67 -70,-68 -70,-69 -70,-70 -70,-71 -70,-71 -69.1,-71 -68.2,-71 -67.3,-71 -66.4,-71 -65.5,-71 -64.6,-71 -63.7,-71 -62.8,-71 -61.9,-71 -61))"], "date_created": "Sat, 01 Jan 2011 00:00:00 GMT", "description": "This collaborative study between the Desert Research Institute, the University of California, Santa Barbara (0529087; Robin Ross), and the University of California, San Diego (0528728; Maria Vernet) will examine the relationship between sea ice extent along the Antarctic Peninsula and the life history of krill (Euphausia superba), by developing, refining, and linking diagnostic datasets and models of phytoplankton decreases in the fall, phytoplankton biomass incorporation into sea ice, sea ice growth dynamics, sea ice algal production and biomass accumulation, and larval krill energetics, condition, and survival. Krill is a key species in the food web of the Southern Ocean ecosystem, and one that is intricately involved with seasonal sea ice dynamics. Results from the Southern Ocean experiment of the Global Ocean Ecosystems Dynamics program (SO-Globec) field work as well as historical information on sea ice dynamics and krill recruitment suggest a shift in the paradigm that all pack ice is equally good krill habitat. SO-Globec is a multidisciplinary effort focused on understanding the physical and biological factors that influence growth, reproduction, recruitment and survival of Antarctic krill (Euphausia superba). The program uses a multi-trophic level approach that includes the predators and competitors of Antarctic krill, represented by other zooplankton, fish, penguins, seals, and cetaceans. This collaborative project is concerned with the synthesis and modeling of lower trophic levels.", "east": -61.0, "geometry": ["POINT(-66 -65.5)"], "keywords": "Bellingshausen Sea; Biota; Oceans; Southern Ocean", "locations": "Bellingshausen Sea; Southern Ocean", "north": -61.0, "nsf_funding_programs": null, "persons": "Quetin, Langdon B.; Ross, Robin Macurda", "project_titles": "Collaborative Research: U.S. SO GLOBEC Synthesis and Modeling: Timing is Everything: The Dynamic Coupling among Phytoplankton, Ice, Ice Algae and Krill (PIIAK)", "projects": [{"proj_uid": "p0000522", "repository": "USAP-DC", "title": "Collaborative Research: U.S. SO GLOBEC Synthesis and Modeling: Timing is Everything: The Dynamic Coupling among Phytoplankton, Ice, Ice Algae and Krill (PIIAK)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -70.0, "title": "The Dynamic Coupling among Phytoplankton, Ice, Ice Algae and Krill (PIIAK)", "uid": "600049", "west": -71.0}, {"awards": "0529666 Fritsen, Christian", "bounds_geometry": ["POLYGON((-180 -39.23,-144 -39.23,-108 -39.23,-72 -39.23,-36 -39.23,0 -39.23,36 -39.23,72 -39.23,108 -39.23,144 -39.23,180 -39.23,180 -44.307,180 -49.384,180 -54.461,180 -59.538,180 -64.615,180 -69.692,180 -74.769,180 -79.846,180 -84.923,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -84.923,-180 -79.846,-180 -74.769,-180 -69.692,-180 -64.615,-180 -59.538,-180 -54.461,-180 -49.384,-180 -44.307,-180 -39.23))"], "date_created": "Sat, 01 Jan 2011 00:00:00 GMT", "description": "This collaborative study between the Desert Research Institute, the University of California, Santa Barbara (0529087; Robin Ross), and the University of California, San Diego (0528728; Maria Vernet) will examine the relationship between sea ice extent along the Antarctic Peninsula and the life history of krill (Euphausia superba), by developing, refining, and linking diagnostic datasets and models of phytoplankton decreases in the fall, phytoplankton biomass incorporation into sea ice, sea ice growth dynamics, sea ice algal production and biomass accumulation, and larval krill energetics, condition, and survival. Krill is a key species in the food web of the Southern Ocean ecosystem, and one that is intricately involved with seasonal sea ice dynamics. Results from the Southern Ocean experiment of the Global Ocean Ecosystems Dynamics program (SO-Globec) field work as well as historical information on sea ice dynamics and krill recruitment suggest a shift in the paradigm that all pack ice is equally good krill habitat. SO-Globec is a multidisciplinary effort focused on understanding the physical and biological factors that influence growth, reproduction, recruitment and survival of Antarctic krill (Euphausia superba). The program uses a multi-trophic level approach that includes the predators and competitors of Antarctic krill, represented by other zooplankton, fish, penguins, seals, and cetaceans. It is currently in a synthesis and modeling phase. This collaborative project is concerned with the lower trophic levels, and will be integrated with other synthesis and modeling studies that deal with grazers, predators, and other higher trophic levels.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Bellingshausen Sea; Cryosphere; Oceans; Photosynthetically Active Radiation (PAR); Sea Ice; Sea Surface; Southern Ocean; Total Integrated Exposure to PAR", "locations": "Bellingshausen Sea; Sea Surface; Southern Ocean", "north": -39.23, "nsf_funding_programs": null, "persons": "Fritsen, Christian", "project_titles": "Collaborative Research: U.S. SO GLOBEC Synthesis and Modeling: Timing is Everything: The Dynamic Coupling among Phytoplankton, Ice, Ice Algae and Krill (PIIAK)", "projects": [{"proj_uid": "p0000522", "repository": "USAP-DC", "title": "Collaborative Research: U.S. SO GLOBEC Synthesis and Modeling: Timing is Everything: The Dynamic Coupling among Phytoplankton, Ice, Ice Algae and Krill (PIIAK)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "The Dynamic Coupling among Phytoplankton, Ice, Ice Algae and Krill (PIIAK)", "uid": "600050", "west": -180.0}, {"awards": "0632389 Murray, Alison", "bounds_geometry": ["POLYGON((-65.3827 -64.4213,-65.13333 -64.4213,-64.88396 -64.4213,-64.63459 -64.4213,-64.38522 -64.4213,-64.13585 -64.4213,-63.88648 -64.4213,-63.63711 -64.4213,-63.38774 -64.4213,-63.13837 -64.4213,-62.889 -64.4213,-62.889 -64.47176,-62.889 -64.52222,-62.889 -64.57268,-62.889 -64.62314,-62.889 -64.6736,-62.889 -64.72406,-62.889 -64.77452,-62.889 -64.82498,-62.889 -64.87544,-62.889 -64.9259,-63.13837 -64.9259,-63.38774 -64.9259,-63.63711 -64.9259,-63.88648 -64.9259,-64.13585 -64.9259,-64.38522 -64.9259,-64.63459 -64.9259,-64.88396 -64.9259,-65.13333 -64.9259,-65.3827 -64.9259,-65.3827 -64.87544,-65.3827 -64.82498,-65.3827 -64.77452,-65.3827 -64.72406,-65.3827 -64.6736,-65.3827 -64.62314,-65.3827 -64.57268,-65.3827 -64.52222,-65.3827 -64.47176,-65.3827 -64.4213))"], "date_created": "Sat, 01 Jan 2011 00:00:00 GMT", "description": "The Western Antarctic Peninsula is experiencing one of the most rapid rates of climate warming on Earth, with an increase of 5degrees C in the mean winter temperature in 50 years. Impacts on upper trophic levels are evident, though there have been few, if any studies that have considered the impacts on bacterioplankton in the Southern Ocean. This proposal will characterize the winter bacterioplankton genome, transcriptome, and proteome and discover those features (community composition, genes up-regulated, and proteins expressed) that are essential to winter bacterioplankton survival and livelihood. We have assembled a polar ocean ecology and genomics network including strategic partnerships with Palmer LTER, the British Antarctic Survey\u0027s ocean metagenome program, US and Canadian scientists studying the Arctic Ocean genome, an Australian colleague who specialized in archaeal proteomics, and French colleagues studying Sub-Antarctic and Coastal Adelie Land marine bacterioplankton. The primary objectives of this program are: 1 Describe the differences in diversity and genomic content between austral winter and summer bacterioplankton communities. 2. Investigate the winter-time bacterioplankton growth and cellular signals (mRNA and proteins expressed) in order to understand the specific adaptations key to survival. Our results will extend from the Antarctic to the Arctic - as the cold, dark, carbon-limited deep seas linking these two systems have many common features. Education and outreach activities target (i) undergraduate and graduate students, hopefully including minority students recruited through the Diversity in Research in Environmental and Marine Sciences (DREAMS) Program at VIMS; (ii) a broad audience with our education and outreach partnerships with The Cousteau Society and with the Census for Antarctic Marine Life program. Data and links to external databases will be listed on the http://genex2.dri.edu website. Sequence data will be publicly accessible in GenBank and IMG-M databases.", "east": -62.889, "geometry": ["POINT(-64.13585 -64.6736)"], "keywords": "Antarctica; Antarctic Peninsula; Biota; Chemistry:Fluid; Oceans; Southern Ocean", "locations": "Antarctic Peninsula; Antarctica; Southern Ocean", "north": -64.4213, "nsf_funding_programs": null, "persons": "Grzymski, Joseph; Murray, Alison", "project_titles": "IPY: Bacterioplankton Genomic Adaptations to Antarctic Winter", "projects": [{"proj_uid": "p0000091", "repository": "USAP-DC", "title": "IPY: Bacterioplankton Genomic Adaptations to Antarctic Winter"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.9259, "title": "IPY: Bacterioplankton Genomic Adaptations to Antarctic Winter", "uid": "600061", "west": -65.3827}, {"awards": "0636319 Shaw, Timothy", "bounds_geometry": ["POLYGON((-51.9201 -57.5061,-50.99447 -57.5061,-50.06884 -57.5061,-49.14321 -57.5061,-48.21758 -57.5061,-47.29195 -57.5061,-46.36632 -57.5061,-45.44069 -57.5061,-44.51506 -57.5061,-43.58943 -57.5061,-42.6638 -57.5061,-42.6638 -58.03449,-42.6638 -58.56288,-42.6638 -59.09127,-42.6638 -59.61966,-42.6638 -60.14805,-42.6638 -60.67644,-42.6638 -61.20483,-42.6638 -61.73322,-42.6638 -62.26161,-42.6638 -62.79,-43.58943 -62.79,-44.51506 -62.79,-45.44069 -62.79,-46.36632 -62.79,-47.29195 -62.79,-48.21758 -62.79,-49.14321 -62.79,-50.06884 -62.79,-50.99447 -62.79,-51.9201 -62.79,-51.9201 -62.26161,-51.9201 -61.73322,-51.9201 -61.20483,-51.9201 -60.67644,-51.9201 -60.14805,-51.9201 -59.61966,-51.9201 -59.09127,-51.9201 -58.56288,-51.9201 -58.03449,-51.9201 -57.5061))"], "date_created": "Sat, 01 Jan 2011 00:00:00 GMT", "description": "Atmospheric warming has been associated with retreating glaciers, disintegrating ice shelves, and the increasing prevalence of icebergs in the Southern Ocean over the last decade. Our preliminary study of two icebergs in the NW Weddell Sea, an area of high iceberg concentration, showed significant delivery of terrestrial material accompanied by significant enhancement of phytoplankton and zooplankton/micronekton abundance, and primary production surrounding the icebergs. We hypothesize that nutrient enrichment by free-drifting icebergs will increase primary production and sedimentation of organic carbon, thus increasing the draw-down and sequestration of CO2 in the Southern Ocean and impacting the global carbon cycle. Our research addresses the following questions:1) What is the relationship between the physical dynamics of free-drifting icebergs and the Fe and nutrient distributions of the surrounding water column? 2) What is the relationship between Fe and nutrient distributions associated with free-drifting icebergs and the organic carbon dynamics of the ice-attached and surrounding pelagic communities (microbes, zooplankton, micronekton)? 3) What is impact on the export flux of particulate organic carbon from the mixed layer? An interdisciplinary approach is proposed to examine iceberg structure and dynamics, biogeochemical processes, and carbon cycling that includes measurement of trace element, nutrient and radionuclide distributions; organic carbon dynamics mediated by microbial, ice-attached and zooplankton communities; and particulate organic carbon export fluxes. Results from this project will further our understanding of the relationship between climate change and carbon sequestration in the Southern Ocean. Our findings will be incorporated into the Antarctic Research division of the Ocean Exploration Center (OEC) as part of the SIOExplorer: Digital Library Project. The OEC allows users to access content, which is classified to one of four levels: entry (grade K-6), student (grade 6-12), college, and research. Graduate students, undergraduates, teachers, and volunteers are important participants in the proposed field and laboratory work. For the K-12 level, a professional writer of children\u0027s books will participate in cruises to produce an account of the expedition and a daily interactive website.", "east": -42.6638, "geometry": ["POINT(-47.29195 -60.14805)"], "keywords": "Biota; Chemistry:Fluid; Geochemistry; Oceans; Sea Ice; Sea Surface; Southern Ocean; Weddell Sea", "locations": "Weddell Sea; Sea Surface; Southern Ocean", "north": -57.5061, "nsf_funding_programs": null, "persons": "Shaw, Tim; Twining, Benjamin", "project_titles": "Collaborative Research: Free Drifting Icebergs as Proliferation Sites of Iron Enrichment, Organic Carbon Production and Export in the Southern Ocean", "projects": [{"proj_uid": "p0000511", "repository": "USAP-DC", "title": "Collaborative Research: Free Drifting Icebergs as Proliferation Sites of Iron Enrichment, Organic Carbon Production and Export in the Southern Ocean"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -62.79, "title": "Free Drifting Icebergs as Proliferation Sites of Iron Enrichment, Organic Carbon Production and Export in the Southern Ocean", "uid": "600064", "west": -51.9201}, {"awards": "0636543 Murray, Alison", "bounds_geometry": ["POLYGON((-51.98403 -57.58068,-51.042765 -57.58068,-50.1015 -57.58068,-49.160235 -57.58068,-48.21897 -57.58068,-47.277705 -57.58068,-46.33644 -57.58068,-45.395175 -57.58068,-44.45391 -57.58068,-43.512645 -57.58068,-42.57138 -57.58068,-42.57138 -58.10845,-42.57138 -58.63622,-42.57138 -59.16399,-42.57138 -59.69176,-42.57138 -60.21953,-42.57138 -60.7473,-42.57138 -61.27507,-42.57138 -61.80284,-42.57138 -62.33061,-42.57138 -62.85838,-43.512645 -62.85838,-44.45391 -62.85838,-45.395175 -62.85838,-46.33644 -62.85838,-47.277705 -62.85838,-48.21897 -62.85838,-49.160235 -62.85838,-50.1015 -62.85838,-51.042765 -62.85838,-51.98403 -62.85838,-51.98403 -62.33061,-51.98403 -61.80284,-51.98403 -61.27507,-51.98403 -60.7473,-51.98403 -60.21953,-51.98403 -59.69176,-51.98403 -59.16399,-51.98403 -58.63622,-51.98403 -58.10845,-51.98403 -57.58068))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "Atmospheric warming has been associated with retreating glaciers, disintegrating ice shelves, and the increasing prevalence of icebergs in the Southern Ocean over the last decade. Our preliminary study of two icebergs in the NW Weddell Sea, an area of high iceberg concentration, showed significant delivery of terrestrial material accompanied by significant enhancement of phytoplankton and zooplankton/micronekton abundance, and primary production surrounding the icebergs. We hypothesize that nutrient enrichment by free-drifting icebergs will increase primary production and sedimentation of organic carbon, thus increasing the draw-down and sequestration of CO2 in the Southern Ocean and impacting the global carbon cycle. Our research addresses the following questions: 1) What is the relationship between the physical dynamics of free-drifting icebergs and the Fe and nutrient distributions of the surrounding water column? 2) What is the relationship between Fe and nutrient distributions associated with free-drifting icebergs and the organic carbon dynamics of the ice-attached and surrounding pelagic communities (microbes, zooplankton, micronekton)? 3) What is impact on the export flux of particulate organic carbon from the mixed layer? An interdisciplinary approach is proposed to examine iceberg structure and dynamics, biogeochemical processes, and carbon cycling that includes measurement of trace element, nutrient and radionuclide distributions; organic carbon dynamics mediated by microbial, ice-attached and zooplankton communities; and particulate organic carbon export fluxes. Results from this project will further our understanding of the relationship between climate change and carbon sequestration in the Southern Ocean. Our findings will be incorporated into the Antarctic Research division of the Ocean Exploration Center (OEC) as part of the SIOExplorer: Digital Library Project. The OEC allows users to access content, which is classified to one of four levels: entry (grade K-6), student (grade 6-12), college, and research. Graduate students, undergraduates, teachers, and volunteers are important participants in the proposed field and laboratory work. For the K-12 level, a professional writer of children\u0027s books will participate in cruises to produce an account of the expedition and a daily interactive website.", "east": -42.57138, "geometry": ["POINT(-47.277705 -60.21953)"], "keywords": "Biota; Geochemistry; NBP0902; Oceans; Physical Oceanography; Sea Ice; Southern Ocean; Weddell Sea", "locations": "Weddell Sea; Southern Ocean", "north": -57.58068, "nsf_funding_programs": null, "persons": "Murray, Alison", "project_titles": "Collaborative Research: Free Drifting Icebergs as Proliferation Sites of Iron Enrichment, Organic Carbon Production and Export in the Southern Ocean", "projects": [{"proj_uid": "p0000511", "repository": "USAP-DC", "title": "Collaborative Research: Free Drifting Icebergs as Proliferation Sites of Iron Enrichment, Organic Carbon Production and Export in the Southern Ocean"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -62.85838, "title": "Free-Drifting Icebergs as Proliferating Dispersion Sites of Iron Enrichment, Organic Carbon Production and Export in the Southern Ocean", "uid": "600065", "west": -51.98403}, {"awards": "0538479 Seibel, Brad", "bounds_geometry": ["POLYGON((166 -77,166.1 -77,166.2 -77,166.3 -77,166.4 -77,166.5 -77,166.6 -77,166.7 -77,166.8 -77,166.9 -77,167 -77,167 -77.1,167 -77.2,167 -77.3,167 -77.4,167 -77.5,167 -77.6,167 -77.7,167 -77.8,167 -77.9,167 -78,166.9 -78,166.8 -78,166.7 -78,166.6 -78,166.5 -78,166.4 -78,166.3 -78,166.2 -78,166.1 -78,166 -78,166 -77.9,166 -77.8,166 -77.7,166 -77.6,166 -77.5,166 -77.4,166 -77.3,166 -77.2,166 -77.1,166 -77))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "Rising atmospheric carbon dioxide concentrations have resulted in greater oceanic uptake of anthropogenic carbon dioxide. Elevated partial pressure of carbon dioxide can impact marine organisms both via decreased carbonate saturation that affects calcification rates and via disturbance to acid-base (metabolic) physiology. Pteropod molluscs (Thecosomata) form shells made of aragonite, a type of calcium carbonate that is highly soluble, suggesting that these organisms may be particularly sensitive to increasing carbon dioxide and reduced carbonate ion concentration. Thecosome pteropods, which dominate the calcium carbonate export south of the Antarctic Polar Front, will be the first major group of marine calcifying organisms to experience carbonate undersaturation within parts of their present-day geographical ranges as a result of anthropogenic carbon dioxide. An unusual, co-evolved relationship between thecosomes and their specialized gymnosome predators provides a unique backdrop against which to assess the physiological and ecological importance of elevated partial pressure of carbon dioxide. Pteropods are functionally important components of the Antarctic ecosystem with potential to influence phytoplankton stocks, carbon export, and dimethyl sulfide levels that, in turn, influence global climate through ocean-atmosphere feedback loops. The research will quantify the impact of elevated carbon dioxide on a dominant aragonitic pteropod, Limacina helicina, and its specialist predator, the gymnosome Clione antarctica, in the Ross Sea through laboratory experimentation. Results will be disseminated broadly to enhance scientific understanding in this field. The project involves collaboration between researchers at a predominantly undergraduate institution with a significant enrollment of students that are typically underrepresented in the research environment (California State University San Marcos - CSUSM) and at a Ph.D.-granting institution (University of Rhode Island - URI). The program will promote education and learning through the joint education of undergraduate students and graduate students at CSUSM and URI as part of a research team, as well as through the teaching activities of the principal investigators. Dr. Keating, CSUSM professor of science education, will participate in the McMurdo fieldwork and lead the outreach opportunities for the project.", "east": 167.0, "geometry": ["POINT(166.5 -77.5)"], "keywords": "Biota; CO2; McMurdo Station; Oceans; Ross Island; Sample/Collection Description; Shell fish; Southern Ocean", "locations": "Ross Island; Southern Ocean", "north": -77.0, "nsf_funding_programs": null, "persons": "Seibel, Brad", "project_titles": "Collaborative Research: Impacts of Elevated pCO2 on a Dominant Aragonitic Pteropod (Thecosomata) and its Specialist Predator (Gymnosomata) in the Ross Sea", "projects": [{"proj_uid": "p0000694", "repository": "USAP-DC", "title": "Collaborative Research: Impacts of Elevated pCO2 on a Dominant Aragonitic Pteropod (Thecosomata) and its Specialist Predator (Gymnosomata) in the Ross Sea"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Impacts of Elevated pCO2 on a Dominant Aragonitic Pteropod (Thecosomata) and its Specialist Predator (Gymnosomata) in the Ross Sea", "uid": "600055", "west": 166.0}, {"awards": "0442857 Baker, Bill", "bounds_geometry": ["POLYGON((-65 -63,-64.8 -63,-64.6 -63,-64.4 -63,-64.2 -63,-64 -63,-63.8 -63,-63.6 -63,-63.4 -63,-63.2 -63,-63 -63,-63 -63.2,-63 -63.4,-63 -63.6,-63 -63.8,-63 -64,-63 -64.2,-63 -64.4,-63 -64.6,-63 -64.8,-63 -65,-63.2 -65,-63.4 -65,-63.6 -65,-63.8 -65,-64 -65,-64.2 -65,-64.4 -65,-64.6 -65,-64.8 -65,-65 -65,-65 -64.8,-65 -64.6,-65 -64.4,-65 -64.2,-65 -64,-65 -63.8,-65 -63.6,-65 -63.4,-65 -63.2,-65 -63))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "Mesoherbivores, and specifically amphipods, are a conspicuous and dominant component of the macroalgal community in Antarctica. Despite their high abundance, the functional ecology, and particularly the trophic relationships of Antarctic amphipods are poorly understood. This project will evaluate the importance of mesograzers (small invertebrate predators approximately 1 to 25 mm in body length) in western Antarctic Peninsula marine communities. This will be accomplished by examining the role of mesoherbivores in structuring macroalgal communities and by elucidating the ecological interactions of mesograzers with a dominant group of benthic macroinvertebrates, the marine sponges. Moreover, chemical studies will be conducted to gain a more thorough understanding of the chemical defenses that Antarctic Peninsula sponges direct towards crustacean mesograzers. Three sets of questions will be addressed concerning the importance of mesograzers, and amphipods in particular, in nearshore habitats of the western Antarctic Peninsula. First, the hypothesis that mesoherbivory is particularly heavy in western Antarctic Peninsula marine communities and has an important influence on algal community structure will be addressed. Initial studies will document which species of amphipods feed in whole or part on microalgae and macroalgae, the incidence and distribution of filamentous endophytes in dominant macroalgae, comparative night time patterns of amphipod abundances on macrophytes, and the role of chemical mediation in these relationships. Second, the broad hypothesis that mesograzers in general, and amphipods in particular, interact with and prey upon sponges to a greater extent than heretofore recognized in Antarctic communities will be tested. The functional basis of these associations will be considered by examining whether the sponges are used as prey, and if so, whether there is evidence that some sponges produce secondary metabolites that show efficacy against mesograzers such as amphipods. Third, the researchers will test the hypotheses that: 1) Antarctic algae and invertebrates biosynthesize secondary metabolites that deter feeding by amphipod predators; and 2) pigments found in three Antarctic sponges are tryptophan catabolites produced as defenses against crustacean predators that impact molting. Evaluation of these hypotheses will be based on isolation and characterization of the specific anti-feeding metabolites, on biosynthetic studies to establish the metabolic origin of the pigments, and on bioassays to establish the chemical defense roles of both groups of compounds. A variety of educational activities will be a major component of this project. Opportunities will be made to support graduate and undergraduate research, both through NSF programs as well as home university-based programs including a number of funded programs that enhance the representation of minorities in the sciences. Through their proven and highly successful interactive web program, the investigators will continue to involve a large numbers of teachers, K-12 students, and other members of the community at large in their scientific endeavors in Antarctica. Moreover, they will actively participate in outreach efforts by presenting numerous talks on their research to school and community groups.", "east": -63.0, "geometry": ["POINT(-64 -64)"], "keywords": "Antarctica; Biota; Oceans; Southern Ocean", "locations": "Antarctica; Southern Ocean", "north": -63.0, "nsf_funding_programs": null, "persons": "Baker, Bill", "project_titles": "Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula; Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula - continuing", "projects": [{"proj_uid": "p0010016", "repository": "USAP-DC", "title": "Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula - continuing"}, {"proj_uid": "p0000475", "repository": "USAP-DC", "title": "Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.0, "title": "The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula", "uid": "600047", "west": -65.0}, {"awards": "0442769 McClintock, James", "bounds_geometry": ["POLYGON((-64.15 -64.78,-64.132 -64.78,-64.114 -64.78,-64.096 -64.78,-64.078 -64.78,-64.06 -64.78,-64.042 -64.78,-64.024 -64.78,-64.006 -64.78,-63.988 -64.78,-63.97 -64.78,-63.97 -64.784,-63.97 -64.788,-63.97 -64.792,-63.97 -64.796,-63.97 -64.8,-63.97 -64.804,-63.97 -64.808,-63.97 -64.812,-63.97 -64.816,-63.97 -64.82,-63.988 -64.82,-64.006 -64.82,-64.024 -64.82,-64.042 -64.82,-64.06 -64.82,-64.078 -64.82,-64.096 -64.82,-64.114 -64.82,-64.132 -64.82,-64.15 -64.82,-64.15 -64.816,-64.15 -64.812,-64.15 -64.808,-64.15 -64.804,-64.15 -64.8,-64.15 -64.796,-64.15 -64.792,-64.15 -64.788,-64.15 -64.784,-64.15 -64.78))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "Mesoherbivores, and specifically amphipods, are a conspicuous and dominant component of the macroalgal community in Antarctica. Despite their high abundance, the functional ecology, and particularly the trophic relationships of Antarctic amphipods are poorly understood. This project will evaluate the importance of mesograzers (small invertebrate predators approximately 1 to 25 mm in body length) in western Antarctic Peninsula marine communities. This will be accomplished by examining the role of mesoherbivores in structuring macroalgal communities and by elucidating the ecological interactions of mesograzers with a dominant group of benthic macroinvertebrates, the marine sponges. Moreover, chemical studies will be conducted to gain a more thorough understanding of the chemical defenses that Antarctic Peninsula sponges direct towards crustacean mesograzers. Three sets of questions will be addressed concerning the importance of mesograzers, and amphipods in particular, in nearshore habitats of the western Antarctic Peninsula. First, the hypothesis that mesoherbivory is particularly heavy in western Antarctic Peninsula marine communities and has an important influence on algal community structure will be addressed. Initial studies will document which species of amphipods feed in whole or part on microalgae and macroalgae, the incidence and distribution of filamentous endophytes in dominant macroalgae, comparative night time patterns of amphipod abundances on macrophytes, and the role of chemical mediation in these relationships. Second, the broad hypothesis that mesograzers in general, and amphipods in particular, interact with and prey upon sponges to a greater extent than heretofore recognized in Antarctic communities will be tested. The functional basis of these associations will be considered by examining whether the sponges are used as prey, and if so, whether there is evidence that some sponges produce secondary metabolites that show efficacy against mesograzers such as amphipods. Third, the researchers will test the hypotheses that: 1) Antarctic algae and invertebrates biosynthesize secondary metabolites that deter feeding by amphipod predators; and 2) pigments found in three Antarctic sponges are tryptophan catabolites produced as defenses against crustacean predators that impact molting. Evaluation of these hypotheses will be based on isolation and characterization of the specific anti-feeding metabolites, on biosynthetic studies to establish the metabolic origin of the pigments, and on bioassays to establish the chemical defense roles of both groups of compounds. A variety of educational activities will be a major component of this project. Opportunities will be made to support graduate and undergraduate research, both through NSF programs as well as home university-based programs including a number of funded programs that enhance the representation of minorities in the sciences. Through their proven and highly successful interactive web program, the investigators will continue to involve a large numbers of teachers, K-12 students, and other members of the community at large in their scientific endeavors in Antarctica. Moreover, they will actively participate in outreach efforts by presenting numerous talks on their research to school and community groups.", "east": -63.97, "geometry": ["POINT(-64.06 -64.8)"], "keywords": "Antarctica; Biota; Oceans; Southern Ocean", "locations": "Antarctica; Southern Ocean", "north": -64.78, "nsf_funding_programs": null, "persons": "McClintock, James; Amsler, Charles", "project_titles": "Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula; Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula - continuing", "projects": [{"proj_uid": "p0000475", "repository": "USAP-DC", "title": "Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula"}, {"proj_uid": "p0010016", "repository": "USAP-DC", "title": "Collaborative Research: The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula - continuing"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.82, "title": "The Chemical Ecology of Shallow-water Marine Macroalgae and Invertebrates on the Antarctic Peninsula", "uid": "600046", "west": -64.15}, {"awards": "0439906 Koch, Paul", "bounds_geometry": ["POLYGON((162 -72,162.6 -72,163.2 -72,163.8 -72,164.4 -72,165 -72,165.6 -72,166.2 -72,166.8 -72,167.4 -72,168 -72,168 -72.6,168 -73.2,168 -73.8,168 -74.4,168 -75,168 -75.6,168 -76.2,168 -76.8,168 -77.4,168 -78,167.4 -78,166.8 -78,166.2 -78,165.6 -78,165 -78,164.4 -78,163.8 -78,163.2 -78,162.6 -78,162 -78,162 -77.4,162 -76.8,162 -76.2,162 -75.6,162 -75,162 -74.4,162 -73.8,162 -73.2,162 -72.6,162 -72))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "During previous NSF-sponsored research, the PI\u0027s discovered that southern elephant seal colonies once existed along the Victoria Land coast (VLC) of Antarctica, a region where they are no longer observed. Molted seal skin and hair occur along 300 km of coastline, more than 1000 km from any extant colony. The last record of a seal at a former colony site is at ~A.D. 1600. Because abandonment occurred prior to subantarctic sealing, disappearance of the VLC colony probably was due to environmental factors, possibly cooling and encroachment of land-fast, perennial sea ice that made access to haul-out sites difficult. The record of seal inhabitation along the VLC, therefore, has potential as a proxy for climate change. Elephant seals are a predominantly subantarctic species with circumpolar distribution. Genetic studies have revealed significant differentiation among populations, particularly with regard to that at Macquarie I., which is the extant population nearest to the abandoned VLC colony. Not only is the Macquarie population unique genetically, but it is has undergone unexplained decline of 2%/yr over the last 50 years3. In a pilot study, genetic analyses showed a close relationship between the VLC seals and those at Macquarie I. An understanding of the relationship between the two populations, as well as of the environmental pressures that led to the demise of the VLC colonies, will provide a better understanding of present-day population genetic structure, the effect of environmental change on seal populations, and possibly the reasons underlying the modern decline at Macquarie Island. This project addresses several key research problems: (1) Why did elephant seals colonize and then abandon the VLC? (2) What does the elephant seal record reveal about Holocene climate change and sea-ice conditions? (3) What were the foraging strategies of the seals and did these strategies change over time as climate varied? (4) How does the genetic structure of the VLC seals relate to extant populations? (5) How did genetic diversity change over time and with colony decline? (6) Using ancient samples to estimate mtDNA mutation rates, what can be learned about VLC population dynamics over time? (7) What was the ecological relationship between elephant seals and Adelie penguins that occupied the same sites, but apparently at different times? The proposed work includes the professional training of young researchers and incorporation of data into graduate and undergraduate courses.\n\nBecause of extreme isolation of the Antarctic continent since the \nEarly Oligocene, one expects a unique invertebrate benthic fauna with \na high degree of endemism. Yet some invertebrate taxa that constitute \nimportant ecological components of sedimentary benthic communities \ninclude more than 40 percent non-endemic species (e.g., benthic \npolychaetes). To account for non-endemic species, intermittent genetic \nexchange must occur between Antarctic and other (e.g. South American) \npopulations. The most likely mechanism for such gene flow, at least \nfor in-faunal and mobile macrobenthos, is dispersal of planktonic \nlarvae across the sub- Antarctic and Antarctic polar fronts. To test \nfor larval dispersal as a mechanism of maintaining genetic continuity \nacross polar fronts, the scientists propose to (1) take plankton \nsamples along transects across Drake passage during both the austral \nsummer and winter seasons while concurrently collecting the \nappropriate hydrographic data. Such data will help elucidate the \nhydrographic mechanisms that allow dispersal across Drake Passage. \nUsing a molecular phylogenetic approach, they will (2) compare \nseemingly identical adult forms from Antarctic and South America \ncontinents to identify genetic breaks, historical gene flow, and \ncontrol for the presence of cryptic species. (3) Similar molecular \ntools will be used to relate planktonic larvae to their adult forms. \nThrough this procedure, they propose to link the larval forms \nrespectively to their Antarctic or South America origins. The proposed \nwork builds on previous research that provides the basis for this \neffort to develop a synthetic understanding of historical gene flow \nand present day dispersal mechanism in South American/Drake Passage/ \nAntarctic Peninsular region. Furthermore, this work represents one of \nthe first attempts to examine recent gene flow in Antarctic benthic \ninvertebrates. Graduate students and a postdoctoral fellow will be \ntrained during this research\n", "east": 168.0, "geometry": ["POINT(165 -75)"], "keywords": "Biota; Isotope; Penguin; Ross Sea; Seals; Southern Ocean", "locations": "Ross Sea; Southern Ocean", "north": -72.0, "nsf_funding_programs": null, "persons": "Koch, Paul", "project_titles": "Collaborative Research: Abandoned Elephant Seal Colonies in Antarctica: Integration of Genetic, Isotopic, and Geologic Approaches toward Understanding Holocene Environmental Change", "projects": [{"proj_uid": "p0000533", "repository": "USAP-DC", "title": "Collaborative Research: Abandoned Elephant Seal Colonies in Antarctica: Integration of Genetic, Isotopic, and Geologic Approaches toward Understanding Holocene Environmental Change"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Abandoned Elephant Seal Colonies in Antarctica: Integration of Genetic, Isotopic, and Geologic Approaches toward Understanding Holocene Environmental Change", "uid": "600041", "west": 162.0}, {"awards": "0338097 DiTullio, Giacomo", "bounds_geometry": ["POLYGON((-169.94 -52.24,-169.449 -52.24,-168.958 -52.24,-168.467 -52.24,-167.976 -52.24,-167.485 -52.24,-166.994 -52.24,-166.503 -52.24,-166.012 -52.24,-165.521 -52.24,-165.03 -52.24,-165.03 -54.879,-165.03 -57.518,-165.03 -60.157,-165.03 -62.796,-165.03 -65.435,-165.03 -68.074,-165.03 -70.713,-165.03 -73.352,-165.03 -75.991,-165.03 -78.63,-165.521 -78.63,-166.012 -78.63,-166.503 -78.63,-166.994 -78.63,-167.485 -78.63,-167.976 -78.63,-168.467 -78.63,-168.958 -78.63,-169.449 -78.63,-169.94 -78.63,-169.94 -75.991,-169.94 -73.352,-169.94 -70.713,-169.94 -68.074,-169.94 -65.435,-169.94 -62.796,-169.94 -60.157,-169.94 -57.518,-169.94 -54.879,-169.94 -52.24))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "The objectives of this proposal are to investigate the controls on the large-scale distribution and production of the two major bloom-forming phytoplankton taxa in the Southern Ocean, diatoms and Phaeocystis Antarctica. These two groups, through their involvement in the biogeochemical cycles of carbon, sulfur and nutrient elements, may have played important roles in the climate variations of the late Quaternary, and they also may be key players in future environmental change. A current paradigm is that irradiance and iron availability drive phytoplankton dynamics in the Southern Ocean. Recent work, however, suggests that carbon dioxide (CO2) concentrations may also be important in structuring algal assemblages, due to species-specific differences in the physiology. This proposal examines the interactive effects of iron, light and CO2 on the physiology, ecology and relative dominance of Phaeocystis and diatoms in the Southern Ocean. The Ross Sea is an ideal system in which to investigate the environmental factors that regulate the distribution and production of these two algal groups, since it is characterized by seasonal blooms of both P. Antarctica and diatoms that are typically separated in both space and time. This study will take the form of an interdisciplinary investigation that includes a field survey and statistical analysis of algal assemblage composition, iron, mixed layer depth, and CO2 levels in the southern Ross Sea, coupled with shipboard experiments to examine the response of diatom and P. Antarctica assemblages to high and low levels of iron, light and CO2 during spring and summer. This project will provide information on some of the major factors controlling the production and distribution of the two major bloom forming phytoplankton in the Southern Ocean and the related biogeochemical cycling of carbon, sulfur and nutrient elements. The results may ultimately advance the ability to predict how the Southern Ocean will be affected by and possibly modulate future climate change. This project will also make significant educational contributions at several levels, including the planned research involvement of graduate and undergraduate students, postdoctoral associates, a student teacher, and community outreach and educational activities. A number of activities are planned to interface the project with K-12 education. Presentations will be made at local schools to discuss the research and events of the research cruise. During the cruise there will be daily interactive email contact with elementary classrooms. Established websites will be used to allow students to learn about the ongoing research, and to allow researchers to communicate with students through text and downloaded images.", "east": -165.03, "geometry": ["POINT(-167.485 -65.435)"], "keywords": "Biota; Chemistry:Fluid; Diatom; Oceans; Phytoplankton; Ross Sea; Southern Ocean", "locations": "Ross Sea; Southern Ocean", "north": -52.24, "nsf_funding_programs": null, "persons": "DiTullio, Giacomo", "project_titles": "Collaborative Research: Interactive Effects of Iron, Light and Carbon Dioxide on Phytoplankton Community Dynamics in the Ross Sea", "projects": [{"proj_uid": "p0000540", "repository": "USAP-DC", "title": "Collaborative Research: Interactive Effects of Iron, Light and Carbon Dioxide on Phytoplankton Community Dynamics in the Ross Sea"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.63, "title": "Interactive Effects of Iron, Light and Carbon Dioxide on Phytoplankton Community Dynamics in the Ross Sea", "uid": "600036", "west": -169.94}, {"awards": "0440687 Costa, Daniel", "bounds_geometry": ["POLYGON((-64 -60,-63 -60,-62 -60,-61 -60,-60 -60,-59 -60,-58 -60,-57 -60,-56 -60,-55 -60,-54 -60,-54 -60.4,-54 -60.8,-54 -61.2,-54 -61.6,-54 -62,-54 -62.4,-54 -62.8,-54 -63.2,-54 -63.6,-54 -64,-55 -64,-56 -64,-57 -64,-58 -64,-59 -64,-60 -64,-61 -64,-62 -64,-63 -64,-64 -64,-64 -63.6,-64 -63.2,-64 -62.8,-64 -62.4,-64 -62,-64 -61.6,-64 -61.2,-64 -60.8,-64 -60.4,-64 -60))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "As long-lived animals, marine mammals must be capable of accommodating broad variations in food resources over large spatial and temporal scales. While this is true of all marine mammals, variation in the physical and biological environmental is particularly profound in the Southern Ocean. A basic understanding of the foraging behavior and habitat utilization of pelagic predators requires knowledge of this spatial and temporal variation, coupled with information of how they respond to these changes. Current understanding of these associations is primarily limited to population level studies where animal abundance has been correlated with oceanography. Although these studies are informative, they cannot provide insights into the strategies employed by individual animals nor can they provide insights into the spatial or temporal course of these interactions. Recent technological advances in instrumentation make it possible to extend an understanding beyond the simple linkage of prey and predator distributions with environmental features. The key to understanding the processes that lead to high predator abundance is the identification of the specific foraging behaviors associated with different features of the water column. This study will accomplish these objectives by combining accurate positional data, measures of diving and foraging behavior, animal-derived water-column temperature and salinity data, and available oceanographic data. This project will examine the foraging behavior and habitat utilization of two species of contrasting foraging ecology, the southern elephant seal, Mirounga leonina, and the crabeater seal, Lobodon carcinophagus in the Western Antarctic Peninsula, a region of strong environmental gradients. Although these two species are phylogenetically related, they utilize substantially different but adjacent habitat types. Southern elephant seals are predominantly pelagic, moving throughout the southern ocean, venturing occasionally into the seasonal pack ice whereas crabeater seals range throughout the seasonal pack ice, venturing occasionally into open water. The relationship of specific foraging behaviors and animal movement patterns to oceanographic and bathymetric features develop and test models of the importance of these features in defining habitat use will be determined along with a comparison of how individuals of each species respond to annual variability in the marine environment. The physical oceanography of the Southern Ocean is inherently complex as are the biological processes that are intrinsically linked to oceanographic processes. Significant resources are currently being directed toward developing mathematical models of physical oceanographic processes with the goals of better understanding the role that the Southern Ocean plays in global climate processes, predicting the responses of ocean and global scale processes to climate change, and understanding the linkages between physical and biological oceanographic processes. These efforts have been limited by the scarcity of oceanographic data in the region, especially at high latitudes in the winter months. This study will provide new and significant oceanographic data on temperature and salinity profiles in to further the understanding of the dynamics of the upper water column of west Antarctic Peninsula continental shelf waters. Outreach activities include website development and an association with a marine education program at the Monterrey Bay Aquarium Research Institute.\n", "east": -54.0, "geometry": ["POINT(-59 -62)"], "keywords": "Bellingshausen Sea; Biota; Oceans; Seals; Southern Ocean", "locations": "Bellingshausen Sea; Southern Ocean", "north": -60.0, "nsf_funding_programs": null, "persons": "Klinck, John M.; Crocker, Daniel; Goebel, Michael; Hofmann, Eileen; Costa, Daniel", "project_titles": "Habitat Utilization of Southern Ocean Seals: Foraging Behavior of Crabeater and Elephant Seals Using Novel Methods of Oceanographic Data Collection", "projects": [{"proj_uid": "p0000082", "repository": "USAP-DC", "title": "Habitat Utilization of Southern Ocean Seals: Foraging Behavior of Crabeater and Elephant Seals Using Novel Methods of Oceanographic Data Collection"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -64.0, "title": "Habitat Utilization of Southern Ocean Seals: Foraging Behavior of Crabeater and Elephant Seals Using Novel Methods of Oceanographic Data Collection", "uid": "600044", "west": -64.0}, {"awards": "9024544 Andreas, Edgar", "bounds_geometry": ["POLYGON((-53.8 -61.2,-52.74 -61.2,-51.68 -61.2,-50.62 -61.2,-49.56 -61.2,-48.5 -61.2,-47.44 -61.2,-46.38 -61.2,-45.32 -61.2,-44.26 -61.2,-43.2 -61.2,-43.2 -62.22,-43.2 -63.24,-43.2 -64.26,-43.2 -65.28,-43.2 -66.3,-43.2 -67.32,-43.2 -68.34,-43.2 -69.36,-43.2 -70.38,-43.2 -71.4,-44.26 -71.4,-45.32 -71.4,-46.38 -71.4,-47.44 -71.4,-48.5 -71.4,-49.56 -71.4,-50.62 -71.4,-51.68 -71.4,-52.74 -71.4,-53.8 -71.4,-53.8 -70.38,-53.8 -69.36,-53.8 -68.34,-53.8 -67.32,-53.8 -66.3,-53.8 -65.28,-53.8 -64.26,-53.8 -63.24,-53.8 -62.22,-53.8 -61.2))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "Location: Ice camp on perennial sea ice in the southwestern corner of the Weddell Sea, Antarctic\n\nThe first direct radiative and turbulent surface flux measurements ever made over floating Antarctic sea ice. The data are from Ice Station Weddell as it drifted in the western Weddell Sea from February to late May 1992.\n\nData Types:\n\nHourly measurements of the turbulent surface fluxes of momentum and sensible and latent heat by eddy covariance at a height of 4.65 m above snow-covered sea ice. Instruments were a 3-axis sonic anemometer/thermometer and a Lyman-alpha hygrometer.\n\nHourly, surface-level measurements of the four radiation components: in-coming and out-going longwave and shortwave radiation. Instruments were hemispherical pyranometers and pyrgeometers.\n\nHourly mean values of standard meteorological variables: air temperature, dew point temperature, wind speed and direction, barometric pressure, surface temperature. Instruments were a propeller-vane for wind speed and direction and cooled-mirror dew-point hygrometers and platinum resistance thermometers for dew-points and temperatures. Surface temperature came from a Barnes PRT-5 infrared thermometer.\n\nFlux Data\nThe entire data kit is bundled as a zip file named ISW_Flux_Data.zip\nThe main data file is comma delimited.\nThe README file is ASCII.\nThe associated reprints of publications are in pdf.\n\nRadiosounding data: On Ice Station Weddell, typically twice a day from 21 February through 4 June 1992 made with both tethered (i.e., only boundary-layer profiles) and (more rarely) free-flying sondes that did not measure wind speed. (168 soundings).\n\nISW Radiosoundings\nThe entire data kit is bundled as a zip file named ISW_Radiosounding.zip.\nThe README file is in ASCII.\nTwo summary files that include the list of sounding and the declinations are in ASCII.\nThe 168 individual sounding files are in ASCII.\nTwo supporting publications that describe the data and some analyses are in pdf.\n\nRadiosounding data collected from the Russian ship Akademic Fedorov from 26 May through 5 June 1992 at 6-hourly intervals as it approached Ice Station Weddell from the north. These soundings include wind vector, temperature, humidity, and pressure. (40 soundings)\n\nAkademic Federov Radiosoundings\nThe entire data kit is bundled as a zip file named Akad_Federov_Radiosounding.zip.\nThe README file is in ASCII.\nA summary file that lists the soundings is in ASCII.\nThe 40 individual sounding files are in ASCII.\nTwo supporting publications that describe the data and some analyses are in pdf.\n\n\nDocumentation:\n\nAndreas, E. L, and K. J. Claffey, 1995: Air-ice drag coefficients in the western Weddell Sea: 1. Values deduced from profile measurements. Journal of Geophysical Research, 100, 4821\u20134831.\n\nAndreas, E. L, K. J. Claffey, and A. P. Makshtas, 2000: Low-level atmospheric jets and inversions over the western Weddell Sea. Boundary-Layer Meteorology, 97, 459\u2013486.\n\nAndreas, E. L, R. E. Jordan, and A. P. Makshtas, 2004: Simulations of snow, ice, and near-surface atmospheric processes on Ice Station Weddell. Journal of Hydrometeorology, 5, 611\u2013624.\n\nAndreas, E. L, R. E. Jordan, and A. P. Makshtas, 2005: Parameterizing turbulent exchange over sea ice: The Ice Station Weddell results. Boundary-Layer Meteorology, 114, 439\u2013460.\n\nAndreas, E. L, P. O. G. Persson, R. E. Jordan, T. W. Horst, P. S. Guest, A. A. Grachev, and C. W. Fairall, 2010: Parameterizing turbulent exchange over sea ice in winter. Journal of Hydrometeorology, 11, 87\u2013104.\n\nClaffey, K. J., E. L Andreas, and A. P. Makshtas, 1994: Upper-air data collected on Ice Station Weddell. Special Report 94-25, U.S. Army Cold Regions Research and Engineering Laboratory, Hanover, NH, 62 pp.\n\nISW Group, 1993: Weddell Sea exploration from ice station. Eos, Transactions, American Geophysical Union, 74, 121\u2013126.\n\nMakshtas, A. P., E. L Andreas, P. N. Svyaschennikov, and V. F. Timachev, 1999: Accounting for clouds in sea ice models. Atmospheric Research, 52, 77\u2013113.", "east": -43.2, "geometry": ["POINT(-48.5 -66.3)"], "keywords": "Antarctica; Atmosphere; Critical Zone; Meteorology; Oceans; Radiosounding; Southern Ocean; Weddell Sea", "locations": "Weddell Sea; Southern Ocean; Antarctica", "north": -61.2, "nsf_funding_programs": null, "persons": "Andreas, Edgar", "project_titles": "Atmospheric Boundary Layer Measurements on the Weddell Sea Drifting Station", "projects": [{"proj_uid": "p0000655", "repository": "USAP-DC", "title": "Atmospheric Boundary Layer Measurements on the Weddell Sea Drifting Station"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -71.4, "title": "Atmospheric Boundary Layer Measurements on the Weddell Sea Drifting Station", "uid": "600141", "west": -53.8}, {"awards": "0636730 Vernet, Maria", "bounds_geometry": ["POLYGON((-55 -52,-53.5 -52,-52 -52,-50.5 -52,-49 -52,-47.5 -52,-46 -52,-44.5 -52,-43 -52,-41.5 -52,-40 -52,-40 -53.3,-40 -54.6,-40 -55.9,-40 -57.2,-40 -58.5,-40 -59.8,-40 -61.1,-40 -62.4,-40 -63.7,-40 -65,-41.5 -65,-43 -65,-44.5 -65,-46 -65,-47.5 -65,-49 -65,-50.5 -65,-52 -65,-53.5 -65,-55 -65,-55 -63.7,-55 -62.4,-55 -61.1,-55 -59.8,-55 -58.5,-55 -57.2,-55 -55.9,-55 -54.6,-55 -53.3,-55 -52))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "Atmospheric warming has been associated with retreating glaciers, disintegrating ice shelves, and the increasing prevalence of icebergs in the Southern Ocean over the last decade. Our preliminary study of two icebergs in the NW Weddell Sea, an area of high iceberg concentration, showed significant delivery of terrestrial material accompanied by significant enhancement of phytoplankton and zooplankton/micronekton abundance, and primary production surrounding the icebergs. We hypothesize that nutrient enrichment by free-drifting icebergs will increase primary production and sedimentation of organic carbon, thus increasing the draw-down and sequestration of CO2 in the Southern Ocean and impacting the global carbon cycle. Our research addresses the following questions: 1) What is the relationship between the physical dynamics of free-drifting icebergs and the Fe and nutrient distributions of the surrounding water column? 2) What is the relationship between Fe and nutrient distributions associated with free-drifting icebergs and the organic carbon dynamics of the ice-attached and surrounding pelagic communities (microbes, zooplankton, micronekton)? 3) What is impact on the export flux of particulate organic carbon from the mixed layer? An interdisciplinary approach is proposed to examine iceberg structure and dynamics, biogeochemical processes, and carbon cycling that includes measurement of trace element, nutrient and radionuclide distributions; organic carbon dynamics mediated by microbial, ice-attached and zooplankton communities; and particulate organic carbon export fluxes. Results from this project will further our understanding of the relationship between climate change and carbon sequestration in the Southern Ocean. Our findings will be incorporated into the Antarctic Research division of the Ocean Exploration Center (OEC) as part of the SIOExplorer: Digital Library Project. The OEC allows users to access content, which is classified to one of four levels: entry (grade K-6), student (grade 6-12), college, and research. Graduate students, undergraduates, teachers, and volunteers are important participants in the proposed field and laboratory work. For the K-12 level, a professional writer of children\u0027s books will participate in cruises to produce an account of the expedition and a daily interactive website.\n", "east": -40.0, "geometry": ["POINT(-47.5 -58.5)"], "keywords": "Antarctica; Biota; Chemistry:Fluid; Geochemistry; NBP0902; Oceans; Physical Oceanography; Sea Surface; Southern Ocean; Weddell Sea", "locations": "Weddell Sea; Sea Surface; Southern Ocean; Antarctica", "north": -52.0, "nsf_funding_programs": null, "persons": "Vernet, Maria", "project_titles": "Collaborative Reseach: Free-drifting Icebergs as Proliferating Dispersion Sites of Iron Enrichment, Organic Carbon Production and Export in the Southern Ocean.", "projects": [{"proj_uid": "p0000532", "repository": "USAP-DC", "title": "Collaborative Reseach: Free-drifting Icebergs as Proliferating Dispersion Sites of Iron Enrichment, Organic Carbon Production and Export in the Southern Ocean."}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.0, "title": "Free-drifting Icebergs as Proliferating Dispersion Sites of Iron Enrichment, Organic Carbon Production and Export in the Southern Ocean", "uid": "600068", "west": -55.0}, {"awards": "0636723 Helly, John", "bounds_geometry": ["POLYGON((-55 -52,-53.5 -52,-52 -52,-50.5 -52,-49 -52,-47.5 -52,-46 -52,-44.5 -52,-43 -52,-41.5 -52,-40 -52,-40 -53.3,-40 -54.6,-40 -55.9,-40 -57.2,-40 -58.5,-40 -59.8,-40 -61.1,-40 -62.4,-40 -63.7,-40 -65,-41.5 -65,-43 -65,-44.5 -65,-46 -65,-47.5 -65,-49 -65,-50.5 -65,-52 -65,-53.5 -65,-55 -65,-55 -63.7,-55 -62.4,-55 -61.1,-55 -59.8,-55 -58.5,-55 -57.2,-55 -55.9,-55 -54.6,-55 -53.3,-55 -52))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "Atmospheric warming has been associated with retreating glaciers, disintegrating ice shelves, and the increasing prevalence of icebergs in the Southern Ocean over the last decade. Our preliminary study of two icebergs in the NW Weddell Sea, an area of high iceberg concentration, showed significant delivery of terrestrial material accompanied by significant enhancement of phytoplankton and zooplankton/micronekton abundance, and primary production surrounding the icebergs. We hypothesize that nutrient enrichment by free-drifting icebergs will increase primary production and sedimentation of organic carbon, thus increasing the draw-down and sequestration of CO2 in the Southern Ocean and impacting the global carbon cycle. Our research addresses the following questions: 1) What is the relationship between the physical dynamics of free-drifting icebergs and the Fe and nutrient distributions of the surrounding water column? 2) What is the relationship between Fe and nutrient distributions associated with free-drifting icebergs and the organic carbon dynamics of the ice-attached and surrounding pelagic communities (microbes, zooplankton, micronekton)? 3) What is impact on the export flux of particulate organic carbon from the mixed layer? An interdisciplinary approach is proposed to examine iceberg structure and dynamics, biogeochemical processes, and carbon cycling that includes measurement of trace element, nutrient and radionuclide distributions; organic carbon dynamics mediated by microbial, ice-attached and zooplankton communities; and particulate organic carbon export fluxes. Results from this project will further our understanding of the relationship between climate change and carbon sequestration in the Southern Ocean. Our findings will be incorporated into the Antarctic Research division of the Ocean Exploration Center (OEC) as part of the SIOExplorer: Digital Library Project. The OEC allows users to access content, which is classified to one of four levels: entry (grade K-6), student (grade 6-12), college, and research. Graduate students, undergraduates, teachers, and volunteers are important participants in the proposed field and laboratory work. For the K-12 level, a professional writer of children\u0027s books will participate in cruises to produce an account of the expedition and a daily interactive website.", "east": -40.0, "geometry": ["POINT(-47.5 -58.5)"], "keywords": "Antarctica; NBP0902; Oceans; Physical Oceanography; Southern Ocean; Weddell Sea", "locations": "Weddell Sea; Antarctica; Southern Ocean", "north": -52.0, "nsf_funding_programs": null, "persons": "Helly, John", "project_titles": "Collaborative Research: Free Drifting Icebergs as Proliferation Sites of Iron Enrichment, Organic Carbon Production and Export in the Southern Ocean", "projects": [{"proj_uid": "p0000511", "repository": "USAP-DC", "title": "Collaborative Research: Free Drifting Icebergs as Proliferation Sites of Iron Enrichment, Organic Carbon Production and Export in the Southern Ocean"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.0, "title": "Free-Drifting Icebergs as Proliferating Dispersion Sites of Iron Enrichment, Organic Carbon Production and Export in the Southern Ocean", "uid": "600067", "west": -55.0}, {"awards": "9319379 Blankenship, Donald; 9911617 Blankenship, Donald", "bounds_geometry": ["POLYGON((-160 -70,-142.5 -70,-125 -70,-107.5 -70,-90 -70,-72.5 -70,-55 -70,-37.5 -70,-20 -70,-2.5 -70,15 -70,15 -72,15 -74,15 -76,15 -78,15 -80,15 -82,15 -84,15 -86,15 -88,15 -90,-2.5 -90,-20 -90,-37.5 -90,-55 -90,-72.5 -90,-90 -90,-107.5 -90,-125 -90,-142.5 -90,-160 -90,-160 -88,-160 -86,-160 -84,-160 -82,-160 -80,-160 -78,-160 -76,-160 -74,-160 -72,-160 -70))"], "date_created": "Fri, 06 Feb 2009 00:00:00 GMT", "description": "This data set is an Antarctic radar-based subglacial lake classification collection, which focuses on the radar reflection properties of each given lake.\n\nThe Subglacial lakes are separated into four categories specified by radar reflection properties. Additional information includes: latitude, longitude, length (in kilometers), hydro-potential (in meters), bed elevation (in meters above WGS84), and ice thickness (in meters).\n\nSource data used to compile this data set were collected between 1998 and 2001. Data are available via FTP as a Microsoft Excel Spreadsheet (XLS), and Tagged Image File Format (TIF).", "east": 15.0, "geometry": ["POINT(-72.5 -80)"], "keywords": "Antarctica; Glaciers/Ice Sheet; Glaciology; subglacial lake", "locations": "Antarctica", "north": -70.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Blankenship, Donald D.; Holt, John W.; Carter, Sasha P.", "project_titles": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR)", "projects": [{"proj_uid": "p0000125", "repository": "USAP-DC", "title": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Antarctic Subglacial Lake Classification Inventory", "uid": "609336", "west": -160.0}, {"awards": "0338342 Foreman, Christine; 0338260 Chin, Yu-Ping", "bounds_geometry": ["POINT(166.167 -77.55)"], "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "Dissolved organic matter (DOM) is a significant chemical component in aquatic systems because it acts as an important carbon source for microorganisms, absorbs harmful radiation in sunlight, is able to complex metals, and can participate in important biogeochemical reactions. This study will investigate the biogeochemical cycling of DOM in a small coastal Antarctic pond, Pony Lake, located on Cape Royds, Ross Island. Because there are no higher plants present at this site all of the DOM in this lake is derived from microorganisms. Thus, Pony Lake is an ideal site to study the effect of physical, chemical, and microbial processes on the composition and character of the DOM pool. Finally, Pony Lake is also an ideal site to collect an International Humic Substances Society (IHSS) fulvic acid standard. Unlike other IHSS standards, this standard will not contain DOM components derived from higher land plants. To better understand the role of physical influences, the project will study the changes in the DOM pool as the lake evolves from ice-covered to ice-free conditions during the summer, as well as the relationship of DOM to the observed turnover of dominant microbial communities in the lake. Scientists will also monitor changes in microbial abundance, diversity, and productivity that may occur during the ice to open-water transition period. This research will provide much needed information regarding the relationship between microbial diversity and DOM biogeochemistry. Middle school science students will be active participants in this project through the Internet, while scientists are in the field, and in the lab.", "east": 166.167, "geometry": ["POINT(166.167 -77.55)"], "keywords": "Antarctica; Chemistry:Fluid; Critical Zone; Ross Island; Sample/Collection Description; Water Samples", "locations": "Ross Island; Antarctica", "north": -77.55, "nsf_funding_programs": null, "persons": "Chin, Yu-Ping; Foreman, Christine", "project_titles": "Collaborative Research: Biogeochemistry of Dissolved Organic Matter in Pony Lake, Ross Island", "projects": [{"proj_uid": "p0000548", "repository": "USAP-DC", "title": "Collaborative Research: Biogeochemistry of Dissolved Organic Matter in Pony Lake, Ross Island"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.55, "title": "Biogeochemistry of Dissolved Organic Matter in Pony Lake, Ross Island", "uid": "600168", "west": 166.167}, {"awards": "0440414 Steig, Eric", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "This award supports a project to obtain stable isotope profiles from shallow (\u003c100 m) ice cores from East Antarctica, to add to the growing database of environmental proxy data collected under the auspices of the \"ITASE\" (International TransAntarctic Scientific Expedition) program. In Antarctica, the instrumental record of climate is particularly short (~40 years except in a few isolated locations on the coast), and ice core proxy data are the only means available for extending this record into the past. The use of stable isotopes of water (18-O/16-O and D/H ratios) from ice cores as proxies for temperature is well established for both very short (i.e. seasonal) and long timescales (centuries, millennia). Using multivariate regression methods and shallow ice cores from West Antarctica, a reconstruction of Antarctic climate over the last ~150 years has been developed which suggests the continent has been warming, on average, at a rate of ~0.2 K/century. Further improving these reconstructions is the chief motivation for further extending the US ITASE project. Ten to fifteen shallow (~100 m) from Victoria Land, East Antarctica will be obtained and analyzed. The core will be collected along a traverse route beginning at Taylor Dome and ending at the South Pole. Age-depth relationships for the cores will be determined through a combination of stable isotopes, visual stratigraphy and seasonal chemical signatures and marker horizons. Reconstructions of Antarctic climate obtained from these cores will be incorporated into the global network of paleoclimate information, which has been important in science, policy and educational contexts. The project will include graduate student and postdoctoral training and field experience.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Atmosphere; Climate; Cryosphere; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Isotope; ITASE; Meteorology; Paleoclimate; Satellite Remote Sensing; Weather Station Data", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": null, "persons": "Steig, Eric J.", "project_titles": "Stable Isotope Studies at East Antarctic US ITASE Sites", "projects": [{"proj_uid": "p0000202", "repository": "USAP-DC", "title": "Stable Isotope Studies at East Antarctic US ITASE Sites"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "ITASE", "south": -90.0, "title": "Stable Isotope Studies at East Antarctic US ITASE Sites", "uid": "600042", "west": -180.0}, {"awards": "0440478 Tang, Kam", "bounds_geometry": ["POINT(166.66267 -77.85067)"], "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "Phaeocystis Antarctica is a widely distributed phytoplankton that forms dense blooms and aggregates in the Southern Ocean. This phytoplankton and plays important roles in polar ecology and biogeochemistry, in part because it is a dominant primary producer, a main component of organic matter vertical fluxes, and the principal producer of volatile organic sulfur in the region. Yet P. Antarctica is also one of the lesser known species in terms of its physiology, life history and trophic relationships with other organisms; furthermore, information collected on other Phaeocystis species and from different locations may not be applicable to P. Antarctica in the Ross Sea. P. Antarctica occurs mainly as two morphotypes: solitary cells and mucilaginous colonies, which differ significantly in size, architecture and chemical composition. Relative dominance between solitary cells and colonies determines not only the size spectrum of the population, but also its carbon dynamics, nutrient uptake and utilization. Conventional thinking of the planktonic trophic processes is also challenged by the fact that colony formation could effectively alter the predator-prey interactions and interspecific competition. However, the factors that regulate the differences between solitary and colonial forms of P. Antarctica are not well-understood. \n\nThe research objective of this proposal is therefore to address these over-arching questions: \n1. Do P. Antarctica solitary cells and colonies differ in growth, composition and photosynthetic rates? 2. How do nutrients and grazers affect colony development and size distribution of P. Antarctica? \n3. How do nutrients and grazers act synergistically to affect the long-term population dynamics of P. Antarctica? \n\nExperiments will be conducted in the McMurdo station with natural P. Antarctica assemblages and co-occurring grazers. Laboratory experiments will be conducted to study size-specific growth and photosynthetic rates of P. Antarctica, size-specific grazing mortality due to microzooplankton and mesozooplankton, the effects of macronutrients on the (nitrogen compounds) relative dominance of solitary cells and colonies, and the effects of micronutrient (Fe) and grazing related chemical signals on P. Antarctica colony development. Because this species is of critical importance in the Southern Ocean, and because this research will provide critical information on factors that regulate the role of P.Antarctica in food webs and biogeochemical cycles, a major gap in knowledge will be addressed. This project will train two marine science Ph.D. students. The investigators will also collaborate with the School of Education and a marine science museum to communicate polar science to a broader audience.", "east": 166.66267, "geometry": ["POINT(166.66267 -77.85067)"], "keywords": "Biota; McMurdo Sound; Oceans; Phytoplankton; Ross Sea; Southern Ocean; Zooplankton", "locations": "McMurdo Sound; Ross Sea; Southern Ocean", "north": -77.85067, "nsf_funding_programs": null, "persons": "Smith, Walker; Tang, Kam", "project_titles": "Environmental and Ecological Regulation of Differences and Interactions between Solitary and Colonial forms of Phaeocystis antarctica", "projects": [{"proj_uid": "p0000214", "repository": "USAP-DC", "title": "Environmental and Ecological Regulation of Differences and Interactions between Solitary and Colonial forms of Phaeocystis antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.85067, "title": "Environmental and Ecological Regulation of Differences and Interactions between Solitary and Colonial Forms of Phaeocystis Antarctica", "uid": "600043", "west": 166.66267}, {"awards": "0230276 Ward, Bess", "bounds_geometry": ["POLYGON((162 -77.2,162.16 -77.2,162.32 -77.2,162.48 -77.2,162.64 -77.2,162.8 -77.2,162.96 -77.2,163.12 -77.2,163.28 -77.2,163.44 -77.2,163.6 -77.2,163.6 -77.26,163.6 -77.32,163.6 -77.38,163.6 -77.44,163.6 -77.5,163.6 -77.56,163.6 -77.62,163.6 -77.68,163.6 -77.74,163.6 -77.8,163.44 -77.8,163.28 -77.8,163.12 -77.8,162.96 -77.8,162.8 -77.8,162.64 -77.8,162.48 -77.8,162.32 -77.8,162.16 -77.8,162 -77.8,162 -77.74,162 -77.68,162 -77.62,162 -77.56,162 -77.5,162 -77.44,162 -77.38,162 -77.32,162 -77.26,162 -77.2))"], "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "Denitrification is the main process by which fixed nitrogen is lost from ecosystems and the regulation of this process may directly affect primary production and carbon cycling over short and long time scales. Previous investigations of the role of bioactive metals in regulating denitrification in bacteria from permanently ice-covered Lake Bonney in the Taylor Valley of East Antarctica indicated that denitrifying bacteria can be negatively affected by metals such as copper, iron, cadmium, lead, chromium, nickel, silver and zinc; and that there is a distinct difference in denitrifying activity between the east and west lobes of the lake. \n\nLow iron concentrations were found to exacerbate the potential toxicity of the other metals, while silver has the potential to specifically inhibit denitrification because of its ability to interfere with copper binding in redox proteins, such as nitrite reductase and nitrous oxide reductase. High silver concentrations might prevent the functioning of nitrous oxide reductase in the same way that simple copper limitation does, thereby causing the buildup of nitrous oxide and resulting in a nonfunctional nitrogen cycle. Other factors, such as oxygen concentration, are likely also to affect bacterial activity in Lake Bonney.\n\nThis project will investigate silver toxicity, general metal toxicity and oxygen concentration to determine their effect on denitrification in the lake by using a suite of \u0027sentinel\u0027 strains of denitrifying bacteria (isolated from the lake) incubated in Lake Bonney water and subjected to various treatments. The physiological responses of these strains to changes in metal and oxygen concentration will be quantified by flow cytometric detection of single cell molecular probes whose sensitivity and interpretation have been optimized for the sentinel strains. Understanding the relationships between metals and denitrification is expected to enhance our understanding of not only Lake Bonney\u0027s unusual nitrogen cycle, but more generally, of the potential role of metals in the regulation of microbial nitrogen transformations. The broader impacts of this work include not only a better understanding of regional biogeochemistry and global perspectives on these processes; but also the training of graduate students and a substantial outreach effort for school children.", "east": 163.6, "geometry": ["POINT(162.8 -77.5)"], "keywords": "Antarctica; Biota; CTD Data; Dry Valleys; Lake Bonney; Lake Vanda; Microbiology; Taylor Valley", "locations": "Dry Valleys; Lake Bonney; Lake Vanda; Taylor Valley; Antarctica", "north": -77.2, "nsf_funding_programs": null, "persons": "Ward, Bess", "project_titles": "Collaborative Research: What Limits Denitrification and Bacterial Growth in Lake Bonney, Taylor Valley, Antarctica?", "projects": [{"proj_uid": "p0000223", "repository": "USAP-DC", "title": "Collaborative Research: What Limits Denitrification and Bacterial Growth in Lake Bonney, Taylor Valley, Antarctica?"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.8, "title": "What Limits Denitrification and Bacterial Growth in Lake Bonney, Taylor Valley, Antarctica?", "uid": "600033", "west": 162.0}, {"awards": "0230069 Naveen, Ron", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "The Antarctic Site Inventory Project has collected biological data and site-descriptive information in the Antarctic Peninsula region since 1994. This research effort has provided data on those sites which are visited by tourists on shipboard expeditions in the region. The aim is to obtain data on the population status of several key species of Antarctic seabirds, which might be affected by the cumulative impact resulting from visits to the sites. This project will continue the effort by focusing on two heavily-visited Antarctic Peninsula sites: Paulet Island, in the northwestern Weddell Sea and Petermann Island, in the Lemaire Channel near Anvers Island. These sites were selected because both rank among the ten most visited sites in Antarctica each year in terms of numbers of visitors and zodiac landings; both are diverse in species composition, and both are sensitive to potential environmental disruptions from visitors. These data collected focus on two important biological parameters for penguins and blue-eyed shags: (1) breeding population size (number of occupied nests) and (2) breeding success (number of chicks per occupied nests). A long-term data program will be supported, with studies at the two sites over a five-year period. The main focus will be at Petermann Island, selected for intensive study due to its visitor status and location in the region near Palmer Station. This will allow for comparative data with the Palmer Long Term Ecological Research program. Demographic data will be collected in accordance with Standard Methods established by the Convention for the Conservation of Antarctic Marine Living Resources Ecosystem Monitoring Program and thus will be comparable with similar data sets being collected by other international Antarctic Treaty nation research programs. While separating human-induced change from change resulting from a combination of environmental factors will be difficult, this work will provide a first step to identify potential impacts. These long-term data sets will contribute to a better understanding of biological processes in the entire region and will contribute valuable information to be used by the Antarctic Treaty Parties as they address issues in environmental stewardship in Antarctica.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Biota; Penguin; Petermann Island", "locations": "Petermann Island; Antarctica", "north": -60.0, "nsf_funding_programs": null, "persons": "Naveen, Ronald", "project_titles": "Long-term Data Collection at Select Antarctic Peninsula Visitor Sites", "projects": [{"proj_uid": "p0000122", "repository": "USAP-DC", "title": "Long-term Data Collection at Select Antarctic Peninsula Visitor Sites"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Long-term Data Collection at Select Antarctic Peninsula Visitor Sites", "uid": "600032", "west": -180.0}, {"awards": "0228842 Grew, Edward", "bounds_geometry": ["POLYGON((76 -69.3,76.05 -69.3,76.1 -69.3,76.15 -69.3,76.2 -69.3,76.25 -69.3,76.3 -69.3,76.35 -69.3,76.4 -69.3,76.45 -69.3,76.5 -69.3,76.5 -69.32,76.5 -69.34,76.5 -69.36,76.5 -69.38,76.5 -69.4,76.5 -69.42,76.5 -69.44,76.5 -69.46,76.5 -69.48,76.5 -69.5,76.45 -69.5,76.4 -69.5,76.35 -69.5,76.3 -69.5,76.25 -69.5,76.2 -69.5,76.15 -69.5,76.1 -69.5,76.05 -69.5,76 -69.5,76 -69.48,76 -69.46,76 -69.44,76 -69.42,76 -69.4,76 -69.38,76 -69.36,76 -69.34,76 -69.32,76 -69.3))"], "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "This award, provided by the Antarctic Geology and Geophysics Program of the Office of Polar Programs, supports a project to investigate the role and fate of Boron in high-grade metamorphic rocks of the Larsemann Hills region of Antarctica. Trace elements provide valuable information on the changes sedimentary rocks undergo as temperature and pressure increase during burial. One such element, boron, is particularly sensitive to increasing temperature because of its affinity for aqueous fluids, which are lost as rocks are buried. Boron contents of unmetamorphosed pelitic sediments range from 20 to over 200 parts per million, but rarely exceed 5 parts per million in rocks subjected to conditions of the middle and lower crust, that is, temperatures of 700 degrees C or more in the granulite-facies, which is characterized by very low water activities at pressures of 5 to 10 kbar (18-35 km burial). Devolatization reactions with loss of aqueous fluid and partial melting with removal of melt have been cited as primary causes for boron depletion under granulite-facies conditions. Despite the pervasiveness of both these processes, rocks rich in boron are locally found in the granulite-facies, that is, there are mechanisms for retaining boron during the metamorphic process. The Larsemann Hills, Prydz Bay, Antarctica, are a prime example. More than 20 lenses and layered bodies containing four borosilicate mineral species crop out over a 50 square kilometer area, which thus would be well suited for research on boron-rich granulite-facies metamorphic rocks. While most investigators have focused on the causes for loss of boron, this work will investigate how boron is retained during high-grade metamorphism. Field observations and mapping in the Larsemann Hills, chemical analyses of minerals and their host rocks, and microprobe age dating will be used to identify possible precursors and deduce how the precursor materials recrystallized into borosilicate rocks under granulite-facies conditions. \n\nThe working hypothesis is that high initial boron content facilitates retention of boron during metamorphism because above a certain threshold boron content, a mechanism \u0027kicks in\u0027 that facilitates retention of boron in metamorphosed rocks. For example, in a rock with large amounts of the borosilicate tourmaline, such as stratabound tourmalinite, the breakdown of tourmaline to melt could result in the formation of prismatine and grandidierite, two borosilicates found in the Larsemann Hills. This situation is rarely observed in rocks with modest boron content, in which breakdown of tourmaline releases boron into partial melts, which in turn remove boron when they leave the system. Stratabound tourmalinite is associated with manganese-rich quartzite, phosphorus-rich rocks and sulfide concentrations that could be diagnostic for recognizing a tourmalinite protolith in a highly metamorphosed complex where sedimentary features have been destroyed by deformation. Because partial melting plays an important role in the fate of boron during metamorphism, our field and laboratory research will focus on the relationship between the borosilicate units, granite pegmatites and other granitic intrusives. The results of our study will provide information on cycling of boron at deeper levels in the Earth\u0027s crust and on possible sources of boron for granites originating from deep-seated rocks. An undergraduate student will participate in the electron microprobe age-dating of monazite and xenotime as part of a senior project, thereby integrating the proposed research into the educational mission of the University of Maine. In response to a proposal for fieldwork, the Australian Antarctic Division, which maintains Davis station near the Larsemann Hills, has indicated that they will support the Antarctic fieldwork.", "east": 76.5, "geometry": ["POINT(76.25 -69.4)"], "keywords": "Antarctica; Chemistry:Rock; Geochemistry; Geochronology; Solid Earth", "locations": "Antarctica", "north": -69.3, "nsf_funding_programs": null, "persons": "Grew, Edward", "project_titles": "Boron in Antarctic granulite-facies rocks: under what conditions is boron retained in the middle crust?", "projects": [{"proj_uid": "p0000431", "repository": "USAP-DC", "title": "Boron in Antarctic granulite-facies rocks: under what conditions is boron retained in the middle crust?"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -69.5, "title": "Boron in Antarctic granulite-facies rocks: under what conditions is boron retained in the middle crust?", "uid": "600030", "west": 76.0}, {"awards": "0739620 Bieber, John", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "This proposal seeks funding to continue the neutron monitor observations at McMurdo for at least 4 years of operation - through the next solar activity maximum predicted in 2011-12. The neutron monitor in McMurdo is a crucial element of the \u0027Spaceship Earth\u0027 array - a 12-station multi-national network of neutron monitors optimized to measure the angular distribution of relativistic solar cosmic rays. McMurdo has the southernmost viewing direction of any neutron monitor station in the World, thereby providing a critical three-dimensional perspective on the cosmic ray distribution measured by the global array. Data returned from McMurdo and other \u0027Spaceship Earth\u0027 stations will enable the advanced understanding of the acceleration and transport of solar energetic particles, and of the transient and long-term modulation of galactic cosmic rays by the Sun. From the historical occurrence rates, continuing McMurdo observations through the solar activity maximum would allow to detect new relativistic solar particle events. Neutron monitors can play a direct role in forecasting and specifying solar wind disturbances, thus improving the capability to forecast major space weather events for the societal benefit. For example, providing the cosmic rays Ground-Level Enhancement (GLE) alerts is of direct relevance to aviation flights over high latitudes where these events can pose health hazards.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Atmosphere; Cosmic Ray; McMurdo; Neutron Monitor", "locations": "McMurdo; Antarctica", "north": -60.0, "nsf_funding_programs": null, "persons": "Evenson, Paul; Bieber, John", "project_titles": "Cosmic Ray Observations in McMurdo", "projects": [{"proj_uid": "p0000679", "repository": "USAP-DC", "title": "Cosmic Ray Observations in McMurdo"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Cosmic Ray Observations in McMurdo", "uid": "600078", "west": -180.0}, {"awards": "0636724 Blankenship, Donald; 0230197 Holt, John", "bounds_geometry": ["POLYGON((-130 -75,-126.5 -75,-123 -75,-119.5 -75,-116 -75,-112.5 -75,-109 -75,-105.5 -75,-102 -75,-98.5 -75,-95 -75,-95 -75.5,-95 -76,-95 -76.5,-95 -77,-95 -77.5,-95 -78,-95 -78.5,-95 -79,-95 -79.5,-95 -80,-98.5 -80,-102 -80,-105.5 -80,-109 -80,-112.5 -80,-116 -80,-119.5 -80,-123 -80,-126.5 -80,-130 -80,-130 -79.5,-130 -79,-130 -78.5,-130 -78,-130 -77.5,-130 -77,-130 -76.5,-130 -76,-130 -75.5,-130 -75))"], "date_created": "Tue, 01 Jan 2008 00:00:00 GMT", "description": "This data set includes airborne altimetry collected over the catchment and main trunk of Thwaites Glacier, one of Antarctica\u0027s most active ice streams. The airborne altimetry comprises 35,000 line-kilometers sampled at 20 meters along track. The full dataset has an internal error of \u00b120 cm; a primary subset has an error of \u00b18 cm. We find a +20 cm bias with Geoscience Laser Altimeter System data over a flat interior region. These data will serve as an additional temporal reference for the evolution of Thwaites Glacier surface, as well as aid the construction of future high resolution Digital Elevation Models (DEM). Line data are available in space-delimited ASCII format and are available via FTP.", "east": -95.0, "geometry": ["POINT(-112.5 -77.5)"], "keywords": "AGASEA; Airborne Altimetry; Antarctica; Elevation; Glaciers/Ice Sheet; Glaciology; Thwaites Glacier", "locations": "Thwaites Glacier; Antarctica", "north": -75.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Young, Duncan A.; Kempf, Scott D.; Blankenship, Donald D.; Holt, John W.; Morse, David L.", "project_titles": "Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System", "projects": [{"proj_uid": "p0000174", "repository": "USAP-DC", "title": "Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.0, "title": "Airborne Laser Altimetry of the Thwaites Glacier Catchment, West Antarctica", "uid": "609334", "west": -130.0}, {"awards": "0229638 Ponganis, Paul", "bounds_geometry": ["POLYGON((163 -77,163.4 -77,163.8 -77,164.2 -77,164.6 -77,165 -77,165.4 -77,165.8 -77,166.2 -77,166.6 -77,167 -77,167 -77.1,167 -77.2,167 -77.3,167 -77.4,167 -77.5,167 -77.6,167 -77.7,167 -77.8,167 -77.9,167 -78,166.6 -78,166.2 -78,165.8 -78,165.4 -78,165 -78,164.6 -78,164.2 -78,163.8 -78,163.4 -78,163 -78,163 -77.9,163 -77.8,163 -77.7,163 -77.6,163 -77.5,163 -77.4,163 -77.3,163 -77.2,163 -77.1,163 -77))"], "date_created": "Tue, 01 Jan 2008 00:00:00 GMT", "description": "The emperor penguin, Aptenodytes forsteri, is the premier avian diver and a top predator in the Antarctic ecosystem. The routine occurrence of 500-m diver during foraging trips to sea is both a physiological and behavior enigma. The objectives of this project address how and why emperors dive as deep and long as they do. The project examines four major topics in the diving biology of emperor penguins: pressure tolerance, oxygen store management, end-organ tolerance of diving hypoxemia/ischemia, and deep-dive foraging behavior. These subjects are relevant to the role of the emperor as a top predator in the Antarctic ecosystem, and to critical concepts in diving physiology, including decompression sickness, nitrogen narcosis, shallow water blackout, hypoxemic tolerance, and extension of aerobic dive time. The following hypotheses will be tested: 1) Prevention of nitrogen narcosis and decompression sickness in emperor penguins is achieved by inhibition of pulmonary gas exchange at depth. 2) Shallow water black out does not occur because of greater cerebral hypoxemic tolerance, and, in deep dives, because of resumption of pulmonary gas exchange during final ascent. 3) The rate of depletion of the blood oxygen store is a function of depth of dive and heart rate. 4) The aerobic dive limit (ADL) reflects the onset of lactate accumulation in locomotory muscle, not total depletion of all oxygen stores. 5) Elevation of tissue antioxidant capacity and free-radical scavenging enzyme activities protect against the routine ischemia/reperfusion which occur during diving. 6) During deep dives, the Antarctic silverfish, Pleuorogramma antarcticum, is the primary prey item for emperors. In addition to evaluation of the hypotheses below, the project has broader impacts in several areas such as partnership with foreign and national institutes and organizations (e.g., the National Institute of Polar Research of Japan, Centro de Investigacioines del Noroeste of Mexico, National Geographic, the University of Texas Southwestern Medical Center, and Sea World). Participation in National Geographic television documentaries will provide unique educational opportunities for the general public; development of state-of-the-art technology (e.g., blood oxygen electrode recorders, blood samplers, and miniaturized digital cameras) will lay the groundwork for future research by this group and others; and the effects of the B15 iceberg on breeding success of emperor penguins will continue to be evaluated with population censuses during planned fieldwork at several Ross Sea emperor penguin colonies.", "east": 167.0, "geometry": ["POINT(165 -77.5)"], "keywords": "Antarctica; Biota; Oceans; Penguin; Southern Ocean", "locations": "Antarctica; Southern Ocean", "north": -77.0, "nsf_funding_programs": null, "persons": "Ponganis, Paul", "project_titles": "Diving Physiology and Behavior of Emperor Penguins", "projects": [{"proj_uid": "p0000239", "repository": "USAP-DC", "title": "Diving Physiology and Behavior of Emperor Penguins"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.0, "title": "Diving Physiology and Behavior of Emperor Penguins", "uid": "600031", "west": 163.0}, {"awards": "0127022 Jeffrey, Wade", "bounds_geometry": ["POLYGON((159.8 -43.3,161.8 -43.3,163.8 -43.3,165.8 -43.3,167.8 -43.3,169.8 -43.3,171.8 -43.3,173.8 -43.3,175.8 -43.3,177.8 -43.3,179.8 -43.3,179.8 -45.65,179.8 -48,179.8 -50.35,179.8 -52.7,179.8 -55.05,179.8 -57.4,179.8 -59.75,179.8 -62.1,179.8 -64.45,179.8 -66.8,177.8 -66.8,175.8 -66.8,173.8 -66.8,171.8 -66.8,169.8 -66.8,167.8 -66.8,165.8 -66.8,163.8 -66.8,161.8 -66.8,159.8 -66.8,159.8 -64.45,159.8 -62.1,159.8 -59.75,159.8 -57.4,159.8 -55.05,159.8 -52.7,159.8 -50.35,159.8 -48,159.8 -45.65,159.8 -43.3))", "POLYGON((167 -74.4,168.36 -74.4,169.72 -74.4,171.08 -74.4,172.44 -74.4,173.8 -74.4,175.16 -74.4,176.52 -74.4,177.88 -74.4,179.24 -74.4,180.6 -74.4,180.6 -74.735,180.6 -75.07,180.6 -75.405,180.6 -75.74,180.6 -76.075,180.6 -76.41,180.6 -76.745,180.6 -77.08,180.6 -77.415,180.6 -77.75,179.24 -77.75,177.88 -77.75,176.52 -77.75,175.16 -77.75,173.8 -77.75,172.44 -77.75,171.08 -77.75,169.72 -77.75,168.36 -77.75,167 -77.75,167 -77.415,167 -77.08,167 -76.745,167 -76.41,167 -76.075,167 -75.74,167 -75.405,167 -75.07,167 -74.735,167 -74.4))"], "date_created": "Tue, 01 Jan 2008 00:00:00 GMT", "description": "Data from five research cruises from OPP grant entitled \"Interactive Effects of UV and Vertical Mixing on Phytoplankton and Bacterial Productivity of Ross Sea Phaeocystis Bloom (OPP0127022). The first two cruises were ships of opportunity cruises in the Pacific Ocean, the first collecting data between Valapariso, Chile and San Diego, CA (October 2002). The second and third cruises combined to provide data in a transect from 70 N to 68 S latitude in the Pacific ocean (August - November 2003). The remaining two cruises were to the Ross Sea, the first in December 2004 - January 2005 and the last from October - November 2005. Data presented include microbial biomass (bacterial direct counts) and chlorophyll a concentrations, bacterial production (as leucine or thymidine incorporation), solar irradiance data, CTD profiles, and one set of under water diffuse attenuation coefficients of for the Ross Sea.", "east": 180.6, "geometry": ["POINT(169.8 -55.05)", "POINT(173.8 -76.075)"], "keywords": "Biota; Chemistry:Fluid; CTD Data; Microbiology; Oceans; Phytoplankton; Ross Sea; Southern Ocean", "locations": "Ross Sea; Southern Ocean", "north": -43.3, "nsf_funding_programs": null, "persons": "Jeffrey, Wade H.", "project_titles": "Collaborative Proposal: Interactive Effects of UV Radiation and Vertical Mixing on Phytoplankton and Bacterial Productivity of Ross See Phaeocystis Blooms", "projects": [{"proj_uid": "p0000578", "repository": "USAP-DC", "title": "Collaborative Proposal: Interactive Effects of UV Radiation and Vertical Mixing on Phytoplankton and Bacterial Productivity of Ross See Phaeocystis Blooms"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.75, "title": "Interactive Effects of UV Radiation and Vertical Mixing on Phytoplankton and Bacterial Productivity of Ross Sea Phaeocystis Blooms", "uid": "600029", "west": 159.8}, {"awards": "0230197 Holt, John", "bounds_geometry": ["POLYGON((-134.9 -71.7,-129.86 -71.7,-124.82 -71.7,-119.78 -71.7,-114.74 -71.7,-109.7 -71.7,-104.66 -71.7,-99.62 -71.7,-94.58 -71.7,-89.54 -71.7,-84.5 -71.7,-84.5 -72.7,-84.5 -73.7,-84.5 -74.7,-84.5 -75.7,-84.5 -76.7,-84.5 -77.7,-84.5 -78.7,-84.5 -79.7,-84.5 -80.7,-84.5 -81.7,-89.54 -81.7,-94.58 -81.7,-99.62 -81.7,-104.66 -81.7,-109.7 -81.7,-114.74 -81.7,-119.78 -81.7,-124.82 -81.7,-129.86 -81.7,-134.9 -81.7,-134.9 -80.7,-134.9 -79.7,-134.9 -78.7,-134.9 -77.7,-134.9 -76.7,-134.9 -75.7,-134.9 -74.7,-134.9 -73.7,-134.9 -72.7,-134.9 -71.7))"], "date_created": "Wed, 25 Oct 2006 00:00:00 GMT", "description": "This data set includes 5 km gridded data from the Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica (AGASEA) conducted during the 2004-2005 austral summer. Investigators derived maps of the ice sheet surface and subglacial topography, which covers the entire catchments of both the Thwaites Glacier and the Pine Islands Glacier, from airborne survey systems mounted on a Twin Otter aircraft. The surveys had sufficient density to identify critical ice dynamic transitions within the Amundsen Sea Embayment (ASE). \n\nThe ASE is the only major drainage to exhibit significant elevation change over the period of available satellite observations. Modeling of the Western Antarctic Ice Sheet (WAIS) deglaciation pinpointed the Pine Island Glacier and the Thwaites Glacier, which comprise a major portion of the ASE, as the most vulnerable features of the WAIS. Present knowledge of the ice thickness and subglacial boundary conditions in the ASE are insufficient to understand its evolution or its sensitivity to climatic change, and it is not yet determined whether these changes are evidence of ongoing deglaciation or simply a fluctuation that does not threaten the equilibrium of the ice sheet. This research will support the efforts of a community of United States and international researchers to assess the present and predict the future behavior of the ice sheet in the ASE. \n\nThese data are available via FTP.", "east": -84.5, "geometry": ["POINT(-109.7 -76.7)"], "keywords": "AGASEA; Airborne Radar; Amundsen Sea; Antarctica; Elevation; Glaciers/Ice Sheet; Glaciology; Solid Earth", "locations": "Amundsen Sea; Antarctica", "north": -71.7, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Holt, John W.; Blankenship, Donald D.; Morse, David L.; Vaughan, David G.; Corr, Hugh F. J.; Young, Duncan A.", "project_titles": "Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica (AGASEA)", "projects": [{"proj_uid": "p0000243", "repository": "USAP-DC", "title": "Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica (AGASEA)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -81.7, "title": "Subglacial Topography: Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica", "uid": "609292", "west": -134.9}, {"awards": "9319379 Blankenship, Donald; 9120464 Blankenship, Donald; 9319369 Blankenship, Donald; 9911617 Blankenship, Donald", "bounds_geometry": ["POLYGON((-90 -68.73,-72 -68.73,-54 -68.73,-36 -68.73,-18 -68.73,0 -68.73,18 -68.73,36 -68.73,54 -68.73,72 -68.73,90 -68.73,90 -69.357,90 -69.984,90 -70.611,90 -71.238,90 -71.865,90 -72.492,90 -73.119,90 -73.746,90 -74.373,90 -75,72 -75,54 -75,36 -75,18 -75,0 -75,-18 -75,-36 -75,-54 -75,-72 -75,-90 -75,-90 -74.373,-90 -73.746,-90 -73.119,-90 -72.492,-90 -71.865,-90 -71.238,-90 -70.611,-90 -69.984,-90 -69.357,-90 -68.73))"], "date_created": "Tue, 13 Jul 2004 00:00:00 GMT", "description": "The data that the Support Office for Aerogeophysical Research (SOAR) provides include various aerogeophysical measurements taken in the West Antarctic Ice Shelf (WAIS) from 1994 to 2001. \n\nThe instruments used in experiments include ice-penetrating radar, laser altimetry and magnetics, and an integrated aerogeophysical platform that includes airborne gravity with carrier-phase GPS to support kinematic differential positioning.\n\nSOAR is a part of the University of Texas Institute for Geophysics (UTIG) and provides several types of data associated with various campaigns over the years. This material is based on work supported by the National Science Foundation under Grants: OPP-9120464, 9319369, 9319379, and 9911617.", "east": 90.0, "geometry": ["POINT(-180 -71.865)"], "keywords": "Airborne Radar; Antarctica; Geology/Geophysics - Other; Glaciers/Ice Sheet; Glaciology; Navigation; Potential Field; SOAR; Solid Earth", "locations": "Antarctica", "north": -68.73, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Blankenship, Donald D.; Morse, David L.; Holt, John W.; Dalziel, Ian W.", "project_titles": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR)", "projects": [{"proj_uid": "p0000125", "repository": "USAP-DC", "title": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -75.0, "title": "Antarctic Aerogeophysics Data", "uid": "609240", "west": -90.0}, {"awards": "8919147 Elliot, David", "bounds_geometry": ["POLYGON((-134 -80,-131 -80,-128 -80,-125 -80,-122 -80,-119 -80,-116 -80,-113 -80,-110 -80,-107 -80,-104 -80,-104 -80.4,-104 -80.8,-104 -81.2,-104 -81.6,-104 -82,-104 -82.4,-104 -82.8,-104 -83.2,-104 -83.6,-104 -84,-107 -84,-110 -84,-113 -84,-116 -84,-119 -84,-122 -84,-125 -84,-128 -84,-131 -84,-134 -84,-134 -83.6,-134 -83.2,-134 -82.8,-134 -82.4,-134 -82,-134 -81.6,-134 -81.2,-134 -80.8,-134 -80.4,-134 -80))"], "date_created": "Wed, 17 Mar 2004 00:00:00 GMT", "description": "Ice surface elevation and ice thickness data are available for a\nportion of the West Antarctic Ice Sheet. The investigators utilized a\nlaser altimeter and ice-penetrating radar mounted to a Twin Otter\naircraft to survey the ice sheet. Ice surface elevations and ice\nthickness data, derived from laser altimetry and radar sounding\nresults, are available in ASCII format via ftp.\n\nThese data are a result of the Corridor Aerogeophysics of the\nSoutheastern Ross Transect Zone (CASERTZ) experiments of the 1990s.\nThe CASERTZ geophysical surveys were aimed at understanding geological\ncontrols on ice streams of the West Antarctic Ice Sheet, ultimately to\nhelp assess the potential for ice sheet collapse. Blankenship et\nal. (2001) used ice surface elevations and ice thicknesses (reported\nhere) to calculate driving stresses across the ice sheet and thus to identify regions of rapid basal movement by ice streams.", "east": -104.0, "geometry": ["POINT(-119 -82)"], "keywords": "Antarctica; Elevation; Glaciers/Ice Sheet; Glaciology; Ross Embayment; West Antarctica", "locations": "Ross Embayment; West Antarctica; Antarctica", "north": -80.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Blankenship, Donald D.; Finn, C. A.; Morse, David L.; Peters, M. E.; Kempf, Scott D.; Hodge, S. M.; Behrendt, J. C.; Brozena, J. M.; Studinger, Michael S.; Bell, Robin", "project_titles": "Corridor Aerogeophysics of the Southeastern Ross Transect Zone (CASERTZ), Antarctica", "projects": [{"proj_uid": "p0000056", "repository": "USAP-DC", "title": "Corridor Aerogeophysics of the Southeastern Ross Transect Zone (CASERTZ), Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -84.0, "title": "Ice Thickness and Surface Elevation, Southeastern Ross Embayment, West Antarctica", "uid": "609099", "west": -134.0}, {"awards": "XXXXXXX Palais, Julie", "bounds_geometry": ["POINT(-149 -81)"], "date_created": "Tue, 01 Jan 2002 00:00:00 GMT", "description": "The WAISCORES project is part of the National Science Foundation Office of Polar Programs\u0027 West Antarctic Ice Sheet (WAIS) initiative, which is aimed at understanding the influence of the West Antarctic ice sheet on climate and sea level change.\nWAISCORES researchers acquired and analyzed ice cores from the Siple Dome, in the Siple Coast region, West Antarctica. These cores allow researchers to distinguish local from regional influences on the climate records recovered from the cores. Drilling for the Siple Dome core began in November 1996 and finished in January 1999. The core site is located between ice streams C and D at approximately 81\u00b0 40\u0027 S and 148\u00b0 49\u0027 W. Preliminary studies indicate that the paleoclimate record preserved in the 1003-meter Siple Dome ice core extends back more than 90 thousand years. Data are available via ftp.\n\nThe following WAISCORES investigators have made contributions to WAISCORES research. NSIDC archives data for many of these investigators: Mary Albert, Richard Alley, Robin Bell, Michael Bender, Robert Bindscadler, Pierre Biscaye, Donald Blankenship, Ed Brook, Nelia Dunbar, Joan Fitzpatrick, Tony Gow, Gregg Lamorey, Paul Mayewski, Joseph McConnell, Deb Meese, Nadine Nereson, Charlie Raymond, Eric Saltzman, Eric Steig, Christopher Shuman, Ken Taylor, Lonnie Thompson, Edwin Waddington, Martin Wahlen, James White, and Gret Zielinksi.", "east": -149.0, "geometry": ["POINT(-149 -81)"], "keywords": "Antarctica; Glaciers/Ice Sheet; WAIS; WAISCORES", "locations": "WAIS; Antarctica", "north": -81.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Lamorey, Gregg W.", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": -81.0, "title": "WAISCORES: Deep Ice Coring in West Antarctica", "uid": "609120", "west": -149.0}]

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