[{"awards": "2019719 Brook, Edward", "bounds_geometry": ["POLYGON((50 -84,55 -84,60 -84,65 -84,70 -84,75 -84,80 -84,85 -84,90 -84,95 -84,100 -84,100 -84.6,100 -85.2,100 -85.8,100 -86.4,100 -87,100 -87.6,100 -88.2,100 -88.8,100 -89.4,100 -90,95 -90,90 -90,85 -90,80 -90,75 -90,70 -90,65 -90,60 -90,55 -90,50 -90,50 -89.4,50 -88.8,50 -88.2,50 -87.6,50 -87,50 -86.4,50 -85.8,50 -85.2,50 -84.6,50 -84))"], "date_created": "Mon, 10 Mar 2025 00:00:00 GMT", "description": "This dataset contains the basal ice unit thickness as measured by the NSF COLDEX MARFA ice-penetrating radar survey, which mainly focuses on the southern flank of Dome A. The \"basal ice unit\" is hereby defined as the bottom portion of the ice sheet where no clear and traceable englacial reflection is detected by the radar sounder. Raw radar data can be found at: https://doi.org/10.15784/601768. The basal ice unit is mapped using the DecisionSpace Geosciences 10ep software package. This dataset provides three data products:\r\n\u003cbr/\u003e\u2022 Thickness of the basal ice unit\r\n\u003cbr/\u003e\u2022 Thickness of the stratigraphic ice unit above the basal ice unit\r\n\u003cbr/\u003e\u2022 The shape of the basal ice unit boundary, where rapid basal ice unit thinning is observed in the middle of the South Pole Basin.", "east": 100.0, "geometry": ["POINT(75 -87)"], "keywords": "Antarctica; Coldex; Cryosphere; East Antarctica; East Antarctic Plateau; Glaciology; Radar Echo Sounder", "locations": "Antarctica; East Antarctica; East Antarctic Plateau", "north": -84.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Yan, Shuai; Young, Duncan A.; Vega Gonzalez, Alejandra; Singh, Shivangini; Kerr, Megan; Blankenship, Donald D.", "project_titles": "Center for Oldest Ice Exploration", "projects": [{"proj_uid": "p0010321", "repository": "USAP-DC", "title": "Center for Oldest Ice Exploration"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "COLDEX", "south": -90.0, "title": "Basal Ice Unit Thickness Mapped by the NSF COLDEX MARFA Ice Penetrating Radar", "uid": "601912", "west": 50.0}, {"awards": "1745116 Scambos, Ted", "bounds_geometry": ["POLYGON((-73 -70.5,-72.35 -70.5,-71.7 -70.5,-71.05 -70.5,-70.4 -70.5,-69.75 -70.5,-69.1 -70.5,-68.45 -70.5,-67.8 -70.5,-67.15 -70.5,-66.5 -70.5,-66.5 -70.8,-66.5 -71.1,-66.5 -71.4,-66.5 -71.7,-66.5 -72,-66.5 -72.3,-66.5 -72.6,-66.5 -72.9,-66.5 -73.2,-66.5 -73.5,-67.15 -73.5,-67.8 -73.5,-68.45 -73.5,-69.1 -73.5,-69.75 -73.5,-70.4 -73.5,-71.05 -73.5,-71.7 -73.5,-72.35 -73.5,-73 -73.5,-73 -73.2,-73 -72.9,-73 -72.6,-73 -72.3,-73 -72,-73 -71.7,-73 -71.4,-73 -71.1,-73 -70.8,-73 -70.5))"], "date_created": "Mon, 24 Feb 2025 00:00:00 GMT", "description": "Data were collected from two sites, one on the southern Wilkins and another on the southern George VI ice shelves. Both sites were investigated as potential sites of perennial firn aquifers; in the case of the southern Wilkins, an extensive firn aquifer was found (Montgomery et al., 2020). Data sources come from two early-model AMIGOS stations (Scambos et al., 2013), ice cores that were collected by hot-ring coring (Montgomery et al., 2020), and ground-penetrating radar profiles. Thermistor data from several depths within the firn core boreholes, transmitted by the AMIGOS stations, show the progression of the seasonal variations in firn temperature at the sites. Radar data show the depth of the firn aquifer (or, its absence at George VI site), and some drainage effects at a nearby rift at the Wilkins site.", "east": -66.5, "geometry": ["POINT(-69.75 -72)"], "keywords": "AMIGOS; Antarctica; Cryosphere; George VI Ice Shelf; Glaciology; Ground Penetrating Radar; Ice Core Data; Ice Shelf; Wilkins Ice Shelf", "locations": "Wilkins Ice Shelf; Antarctica", "north": -70.5, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Scambos, Ted; Miller, Julie; Miege, Clement; Montgomery, Lynn; Wallin, Bruce", "project_titles": "Antarctic Firn Aquifers: Extent, Characteristics, and Comparison with Greenland Occurrences", "projects": [{"proj_uid": "p0010126", "repository": "USAP-DC", "title": "Antarctic Firn Aquifers: Extent, Characteristics, and Comparison with Greenland Occurrences"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -73.5, "title": "Weather, Firn Core, and Ground-penetrating radar data from southern Wilkins and George VI ice shelves, 2018-2019", "uid": "601905", "west": -73.0}, {"awards": "1929991 Pettit, Erin C", "bounds_geometry": ["POLYGON((-106.5 -74.5,-106.3 -74.5,-106.1 -74.5,-105.9 -74.5,-105.7 -74.5,-105.5 -74.5,-105.3 -74.5,-105.1 -74.5,-104.9 -74.5,-104.7 -74.5,-104.5 -74.5,-104.5 -74.6,-104.5 -74.7,-104.5 -74.8,-104.5 -74.9,-104.5 -75,-104.5 -75.1,-104.5 -75.2,-104.5 -75.3,-104.5 -75.4,-104.5 -75.5,-104.7 -75.5,-104.9 -75.5,-105.1 -75.5,-105.3 -75.5,-105.5 -75.5,-105.7 -75.5,-105.9 -75.5,-106.1 -75.5,-106.3 -75.5,-106.5 -75.5,-106.5 -75.4,-106.5 -75.3,-106.5 -75.2,-106.5 -75.1,-106.5 -75,-106.5 -74.9,-106.5 -74.8,-106.5 -74.7,-106.5 -74.6,-106.5 -74.5))"], "date_created": "Fri, 21 Feb 2025 00:00:00 GMT", "description": "These datasets include detailed digitized shapefiles of surface fractures (polylines) and internal m\u00e9lange zones (polygons) within the pinning-point shear zone of the Thwaites Eastern Ice Shelf. They were created using high-resolution (15-meter) panchromatic bands from Landsat 7, 8, and 9, with data from 2002 to 2022. Monthly digitization from January 2020 to July 2022 was also performed using preprocessed Sentinel-1 Synthetic Aperture Radar (SAR) images. Each feature includes attributes such as length and orientation, recorded in the EPSG:3031 coordinate reference system, and detailed in the attribute table. Additional funding was received from NE/S006419/1", "east": -104.5, "geometry": ["POINT(-105.5 -75)"], "keywords": "Antarctica; Cryosphere; Fractures; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Shelf; Thwaites", "locations": "Thwaites; Antarctica; Thwaites", "north": -74.5, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Banerjee, Debangshu; Lilien, David; Truffer, Martin; Luckman, Adrian; Wild, Christian; Pettit, Erin; Scambos, Ted; Muto, Atsuhiro; Alley, Karen", "project_titles": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment", "projects": [{"proj_uid": "p0010162", "repository": "USAP-DC", "title": "NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -75.5, "title": "Pinning-point shear-zone fractures in Thwaites Eastern Ice Shelf (2002 - 2022)", "uid": "601903", "west": -106.5}, {"awards": "1744993 Higgins, John", "bounds_geometry": ["POINT(159.356125 -76.732376)"], "date_created": "Wed, 12 Feb 2025 00:00:00 GMT", "description": "Between about 2.8-0.9 Ma, Earth\u2019s climate was characterized by 40 kyr cycles, driven or paced by changes in the tilt of Earth\u2019s spin axis. Much is known about the 40k world from studies of deep-sea sediments, but our understanding of climate change during this period and the transition between the 40kyr glacial cycles from 2.8-0.9 Ma and the 100kyr glacial cycles of the last 0.9 Myr is incomplete because we lack records of Antarctic climate and direct records of atmospheric greenhouse gas concentrations. We propose to address these issues by building on our recent studies of \u003e1 Ma ice discovered in shallow ice cores in the Allan Hills Blue Ice Area (BIA), Antarctica. During the 2015-2016 field season we recovered ice from two nearby drill cores that dates to \u003e 2 million years in age using the 40Ar/38Ar ratio of the trapped gases. Our discovery of ice of this antiquity in two cores demonstrates that there is gas-record quality ice from the 40k world in the Allan Hills BIA. To further characterize the composition of Earth\u2019s atmosphere and Antarctic climate during the 40k world we request support for two field seasons to drill new large-volume (4\u201d or 9\u201d diameter) ice cores at sites where we have previously identified \u003e1 Ma ice and nearby sites where ground penetrating radar has identified bedrock features conducive to the preservation of old ice.", "east": 159.356125, "geometry": ["POINT(159.356125 -76.732376)"], "keywords": "Allan Hills; Antarctica; Cryosphere; Glaciology; Ice Core Data; MOT; Ocean Temperature; Paleoclimate; Xe/Kr", "locations": "Allan Hills; Antarctica", "north": -76.732376, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Higgins, John", "project_titles": "Center for Oldest Ice Exploration; Collaborative research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area ", "projects": [{"proj_uid": "p0010253", "repository": "USAP-DC", "title": "Collaborative research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area "}, {"proj_uid": "p0010321", "repository": "USAP-DC", "title": "Center for Oldest Ice Exploration"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.732376, "title": "MOT data (Xe/Kr) from Allan Hills ice cores ALHIC1901, 1902, and 1903", "uid": "601897", "west": 159.356125}, {"awards": "1744993 Higgins, John", "bounds_geometry": ["POINT(159.3562 -76.73243)"], "date_created": "Wed, 12 Feb 2025 00:00:00 GMT", "description": "Between about 2.8-0.9 Ma, Earth\u2019s climate was characterized by 40 kyr cycles, driven or paced by changes in the tilt of Earth\u2019s spin axis. Much is known about the 40k world from studies of deep-sea sediments, but our understanding of climate change during this period and the transition between the 40kyr glacial cycles from 2.8-0.9 Ma and the 100kyr glacial cycles of the last 0.9 Myr is incomplete because we lack records of Antarctic climate and direct records of atmospheric greenhouse gas concentrations. We propose to address these issues by building on our recent studies of \u003e1 Ma ice discovered in shallow ice cores in the Allan Hills Blue Ice Area (BIA), Antarctica. During the 2015-2016 field season we recovered ice from two nearby drill cores that dates to \u003e 2 million years in age using the 40Ar/38Ar ratio of the trapped gases. Our discovery of ice of this antiquity in two cores demonstrates that there is gas-record quality ice from the 40k world in the Allan Hills BIA. To further characterize the composition of Earth\u2019s atmosphere and Antarctic climate during the 40k world we request support for two field seasons to drill new large-volume (4\u201d or 9\u201d diameter) ice cores at sites where we have previously identified \u003e1 Ma ice and nearby sites where ground penetrating radar has identified bedrock features conducive to the preservation of old ice.\r\n\u003cbr/\u003e", "east": 159.3562, "geometry": ["POINT(159.3562 -76.73243)"], "keywords": "Allan Hills; Antarctica; Ch4; CO2; Cryosphere; Glaciology; Glaciology; Ice Core Data; Ice Core Records", "locations": "Antarctica; Allan Hills", "north": -76.73243, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Higgins, John", "project_titles": "Center for Oldest Ice Exploration; Collaborative research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area ", "projects": [{"proj_uid": "p0010253", "repository": "USAP-DC", "title": "Collaborative research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area "}, {"proj_uid": "p0010321", "repository": "USAP-DC", "title": "Center for Oldest Ice Exploration"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.73243, "title": "CO2 and CH4 from Allan Hills ice cores ALHIC1901, 1902, and 1903", "uid": "601896", "west": 159.3562}, {"awards": "1744993 Higgins, John", "bounds_geometry": null, "date_created": "Tue, 11 Feb 2025 00:00:00 GMT", "description": "Between about 2.8-0.9 Ma, Earth\u2019s climate was characterized by 40 kyr cycles, driven or paced by changes in the tilt of Earth\u2019s spin axis. Much is known about the 40k world from studies of deep-sea sediments, but our understanding of climate change during this period and the transition between the 40kyr glacial cycles from 2.8-0.9 Ma and the 100kyr glacial cycles of the last 0.9 Myr is incomplete because we lack records of Antarctic climate and direct records of atmospheric greenhouse gas concentrations. We propose to address these issues by building on our recent studies of \u003e1 Ma ice discovered in shallow ice cores in the Allan Hills Blue Ice Area (BIA), Antarctica. During the 2015-2016 field season we recovered ice from two nearby drill cores that dates to \u003e 2 million years in age using the 40Ar/38Ar ratio of the trapped gases. Our discovery of ice of this antiquity in two cores demonstrates that there is gas-record quality ice from the 40k world in the Allan Hills BIA. To further characterize the composition of Earth\u2019s atmosphere and Antarctic climate during the 40k world we request support for two field seasons to drill new large-volume (4\u201d or 9\u201d diameter) ice cores at sites where we have previously identified \u003e1 Ma ice and nearby sites where ground penetrating radar has identified bedrock features conducive to the preservation of old ice. ", "east": null, "geometry": null, "keywords": "Allan Hills; Antarctica; Cryosphere; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Noble Gas", "locations": "Antarctica; Allan Hills", "north": null, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Higgins, John", "project_titles": "Center for Oldest Ice Exploration; Collaborative research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area ", "projects": [{"proj_uid": "p0010253", "repository": "USAP-DC", "title": "Collaborative research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area "}, {"proj_uid": "p0010321", "repository": "USAP-DC", "title": "Center for Oldest Ice Exploration"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": null, "title": "Heavy noble gases (Ar/Xe/Kr) from ALHIC1901, 1902, and 1903", "uid": "601895", "west": null}, {"awards": "1738989 Venturelli, Ryan", "bounds_geometry": ["POLYGON((-104.9429 -75.1543,-104.92228999999999 -75.1543,-104.90168 -75.1543,-104.88107 -75.1543,-104.86046 -75.1543,-104.83985 -75.1543,-104.81924 -75.1543,-104.79863 -75.1543,-104.77802 -75.1543,-104.75741000000001 -75.1543,-104.7368 -75.1543,-104.7368 -75.16263000000001,-104.7368 -75.17096000000001,-104.7368 -75.17929000000001,-104.7368 -75.18762000000001,-104.7368 -75.19595000000001,-104.7368 -75.20428,-104.7368 -75.21261,-104.7368 -75.22094,-104.7368 -75.22927,-104.7368 -75.2376,-104.75741000000001 -75.2376,-104.77802 -75.2376,-104.79863 -75.2376,-104.81924 -75.2376,-104.83985 -75.2376,-104.86046 -75.2376,-104.88107 -75.2376,-104.90168 -75.2376,-104.92228999999999 -75.2376,-104.9429 -75.2376,-104.9429 -75.22927,-104.9429 -75.22094,-104.9429 -75.21261,-104.9429 -75.20428,-104.9429 -75.19595000000001,-104.9429 -75.18762000000001,-104.9429 -75.17929000000001,-104.9429 -75.17096000000001,-104.9429 -75.16263000000001,-104.9429 -75.1543))"], "date_created": "Mon, 25 Nov 2024 00:00:00 GMT", "description": "Contains ice-penetrating radar data (10 and 400 MHz) from the Thwaites Glacier grounding zone. The main purpose of collecting these data was for safety assessment at a camp put-in; deep (10 MHz) radar data were also collected opportunistically.", "east": -104.7368, "geometry": ["POINT(-104.83985 -75.19595000000001)"], "keywords": "Antarctica; Cryosphere; Grounding Zone; Ice Penetrating Radar; Thwaites Glacier", "locations": "Antarctica; Thwaites Glacier", "north": -75.1543, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Balco, Greg; Campbell, Seth; Goehring, Brent", "project_titles": "NSF-NERC: Geological History Constraints on the Magnitude of Grounding Line Retreat in the Thwaites Glacier System", "projects": [{"proj_uid": "p0010165", "repository": "USAP-DC", "title": "NSF-NERC: Geological History Constraints on the Magnitude of Grounding Line Retreat in the Thwaites Glacier System"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -75.2376, "title": "Ice-penetrating radar data from the Thwaites Glacier grounding zone", "uid": "601860", "west": -104.9429}, {"awards": "1738989 Venturelli, Ryan", "bounds_geometry": ["POLYGON((-110.9665 -75.1967,-110.92041 -75.1967,-110.87432 -75.1967,-110.82822999999999 -75.1967,-110.78214 -75.1967,-110.73605 -75.1967,-110.68996 -75.1967,-110.64386999999999 -75.1967,-110.59778 -75.1967,-110.55169000000001 -75.1967,-110.5056 -75.1967,-110.5056 -75.20331,-110.5056 -75.20992000000001,-110.5056 -75.21653,-110.5056 -75.22314,-110.5056 -75.22975,-110.5056 -75.23636,-110.5056 -75.24297,-110.5056 -75.24958,-110.5056 -75.25619,-110.5056 -75.2628,-110.55169000000001 -75.2628,-110.59778 -75.2628,-110.64386999999999 -75.2628,-110.68996 -75.2628,-110.73605 -75.2628,-110.78214 -75.2628,-110.82822999999999 -75.2628,-110.87432 -75.2628,-110.92041 -75.2628,-110.9665 -75.2628,-110.9665 -75.25619,-110.9665 -75.24958,-110.9665 -75.24297,-110.9665 -75.23636,-110.9665 -75.22975,-110.9665 -75.22314,-110.9665 -75.21653,-110.9665 -75.20992000000001,-110.9665 -75.20331,-110.9665 -75.1967))"], "date_created": "Wed, 13 Nov 2024 00:00:00 GMT", "description": "Contains ice-penetrating radar data (10, 100, and 400 MHz) from the north side of the Mt. Murphy massif. Most of these data are closely spaced lines used for reconnaissance and site selection for a subglacial bedrock recovery drilling project very close to the ice margin at the north ridge of Kay Peak, a sub-peak of the massif. In addition, there are several longer exploratory lines that cross the embayment between the massif and the Crosson Ice Shelf, some of which may cross grounding lines. ", "east": -110.5056, "geometry": ["POINT(-110.73605 -75.22975)"], "keywords": "Antarctica; Cryosphere; Mount Murphy", "locations": "Antarctica; Mount Murphy", "north": -75.1967, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Balco, Greg; Campbell, Seth; Goehring, Brent", "project_titles": "NSF-NERC: Geological History Constraints on the Magnitude of Grounding Line Retreat in the Thwaites Glacier System", "projects": [{"proj_uid": "p0010165", "repository": "USAP-DC", "title": "NSF-NERC: Geological History Constraints on the Magnitude of Grounding Line Retreat in the Thwaites Glacier System"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -75.2628, "title": "Ice-penetrating radar data from the northern embayment of the Mt. Murphy massif", "uid": "601834", "west": -110.9665}, {"awards": "2136938 Tedesco, Marco", "bounds_geometry": ["POLYGON((-40 67.55,-39.611 67.55,-39.222 67.55,-38.833 67.55,-38.444 67.55,-38.055 67.55,-37.666 67.55,-37.277 67.55,-36.888 67.55,-36.499 67.55,-36.11 67.55,-36.11 67.28999999999999,-36.11 67.03,-36.11 66.77,-36.11 66.51,-36.11 66.25,-36.11 65.99,-36.11 65.73,-36.11 65.47,-36.11 65.21000000000001,-36.11 64.95,-36.499 64.95,-36.888 64.95,-37.277 64.95,-37.666 64.95,-38.055 64.95,-38.444 64.95,-38.833 64.95,-39.222 64.95,-39.611 64.95,-40 64.95,-40 65.21000000000001,-40 65.47,-40 65.73,-40 65.99,-40 66.25,-40 66.51,-40 66.77,-40 67.03,-40 67.28999999999999,-40 67.55))"], "date_created": "Mon, 07 Oct 2024 00:00:00 GMT", "description": "This dataset contains high-resolution satellite-derived snow/ice surface melt-related data on a common 100 m equal area grid (Albers equal area projection; EPSG 9822) over Helheim Glacier and surrounding areas in Greenland. The data is used as part of a machine learning framework that aims to fill data gaps in computed meltwater fraction on the 100 m grid using a range of methods, results of which will be published separately.\r\n\u003cbr/\u003e\u003cbr/\u003e\r\n\u003cbr/\u003e\u003cbr/\u003eThe data include fraction of a grid cell covered by meltwater derived from Sentinel-1 synthetic aperture radar (SAR) backscatter, satellite-derived passive microwave (PMW) brightness temperatures, snowpack liquid water content within the first meter of snow and atmospheric and radiative variables from the Mod\u00e9le Atmosph\u00e9rique R\u00e8gional (MAR) regional climate model, spectral reflectance in four wavelength bands from the Moderate Resolution Imaging Spectroradiometer (MODIS), a static digital elevation model (DEM), and an ice sheet mask. \r\n\u003cbr/\u003e\u003cbr/\u003eA similar dataset has also been produced for Larsen C ice shelf and is also available through the US Antarctic Program Data Center. \r\n\u003cbr/\u003e\u003cbr/\u003e\r\n\u003cbr/\u003e\u003cbr/\u003e\r\n\u003cbr/\u003e\u003cbr/\u003e", "east": -36.11, "geometry": ["POINT(-38.055 66.25)"], "keywords": "Antarctica; Climate Modeling; Cryosphere; Downscaling; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Greenland; Ice Sheet; Machine Learning; MAR; Remote Sensing; Sea Level Rise; Snow/ice; Snow/Ice; Surface Melt", "locations": "Greenland; Antarctica; Greenland", "north": 67.55, "nsf_funding_programs": "Polar Cyberinfrastructure", "persons": "Alexander, Patrick; Antwerpen, Raphael; Cervone, Guido; Fettweis, Xavier; L\u00fctjens, Bj\u00f6rn; Tedesco, Marco", "project_titles": "Collaborative Research: EAGER: Generation of high resolution surface melting maps over Antarctica using regional climate models, remote sensing and machine learning", "projects": [{"proj_uid": "p0010277", "repository": "USAP-DC", "title": "Collaborative Research: EAGER: Generation of high resolution surface melting maps over Antarctica using regional climate models, remote sensing and machine learning"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": 64.95, "title": "Surface melt-related multi-source remote-sensing and climate model data over Helheim Glacier, Greenland for segmentation and machine learning applications", "uid": "601841", "west": -40.0}, {"awards": "2136938 Tedesco, Marco", "bounds_geometry": ["POLYGON((-68.5 -65.25,-67.35 -65.25,-66.2 -65.25,-65.05 -65.25,-63.9 -65.25,-62.75 -65.25,-61.6 -65.25,-60.45 -65.25,-59.3 -65.25,-58.15 -65.25,-57 -65.25,-57 -65.652,-57 -66.054,-57 -66.456,-57 -66.858,-57 -67.25999999999999,-57 -67.66199999999999,-57 -68.064,-57 -68.466,-57 -68.868,-57 -69.27,-58.15 -69.27,-59.3 -69.27,-60.45 -69.27,-61.6 -69.27,-62.75 -69.27,-63.9 -69.27,-65.05 -69.27,-66.2 -69.27,-67.35 -69.27,-68.5 -69.27,-68.5 -68.868,-68.5 -68.466,-68.5 -68.064,-68.5 -67.66199999999999,-68.5 -67.25999999999999,-68.5 -66.858,-68.5 -66.456,-68.5 -66.054,-68.5 -65.652,-68.5 -65.25))"], "date_created": "Mon, 07 Oct 2024 00:00:00 GMT", "description": "This dataset contains high-resolution satellite-derived snow/ice surface melt-related data on a common 100 m equal area grid (Lambert azimuthal equal area projection; EPSG 9820) over Larsen C Ice Shelf and surrounding areas in Antarctica. The data is prepared to be used as part of a machine learning framework that aims to fill data gaps in computed meltwater fraction on the 100 m grid using a range of methods, results of which will be published separately.\r\n\u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003eThe data include fraction of a grid cell covered by meltwater derived from Sentinel-1 synthetic aperture radar (SAR) backscatter, satellite-derived passive microwave (PMW) brightness temperatures, snowpack liquid water content within the first meter of snow and atmospheric and radiative variables from the Mod\u00e9le Atmosph\u00e9rique R\u00e8gional (MAR) regional climate model, a static digital elevation model (DEM), and an ice sheet mask. \r\n\u003cbr/\u003e\u003cbr/\u003e\u003cbr/\u003eA similar dataset has been produced for Helheim Glacier, Greenland and is also available through the US Antarctic Program Data Center.", "east": -57.0, "geometry": ["POINT(-62.75 -67.25999999999999)"], "keywords": "Antarctica; Climate Modeling; Cryosphere; Downscaling; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Shelf; Larsen C Ice Shelf; Machine Learning; MAR; Remote Sensing; Sea Level Rise; Snow/ice; Snow/Ice; Surface Melt", "locations": "Antarctica; Larsen C Ice Shelf", "north": -65.25, "nsf_funding_programs": "Polar Cyberinfrastructure", "persons": "Alexander, Patrick; Antwerpen, Raphael; Cervone, Guido; Fettweis, Xavier; L\u00fctjens, Bj\u00f6rn; Tedesco, Marco", "project_titles": "Collaborative Research: EAGER: Generation of high resolution surface melting maps over Antarctica using regional climate models, remote sensing and machine learning", "projects": [{"proj_uid": "p0010277", "repository": "USAP-DC", "title": "Collaborative Research: EAGER: Generation of high resolution surface melting maps over Antarctica using regional climate models, remote sensing and machine learning"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -69.27, "title": "Surface melt-related multi-source remote-sensing and climate model data over Larsen C Ice Shelf, Antarctica for segmentation and machine learning applications", "uid": "601842", "west": -68.5}, {"awards": "0087144 Conway, Howard", "bounds_geometry": ["POLYGON((-150 -83.5,-148 -83.5,-146 -83.5,-144 -83.5,-142 -83.5,-140 -83.5,-138 -83.5,-136 -83.5,-134 -83.5,-132 -83.5,-130 -83.5,-130 -83.65,-130 -83.8,-130 -83.95,-130 -84.1,-130 -84.25,-130 -84.4,-130 -84.55,-130 -84.7,-130 -84.85,-130 -85,-132 -85,-134 -85,-136 -85,-138 -85,-140 -85,-142 -85,-144 -85,-146 -85,-148 -85,-150 -85,-150 -84.85,-150 -84.7,-150 -84.55,-150 -84.4,-150 -84.25,-150 -84.1,-150 -83.95,-150 -83.8,-150 -83.65,-150 -83.5))"], "date_created": "Mon, 22 Jul 2024 00:00:00 GMT", "description": "Marine ice sheets are low-pass filters of climate variability that take centuries to adjust to interior and near-terminus changes in mass balance. Constraining these century-scale changes from satellite observations that span only the last 40 years is challenging. Here, we take a different approach of carefully synthesizing different data sets to infer changes in the configurations of van der Veen and Mercer Ice Streams on the Siple Coast over the past 3000 years from englacial features encoded in ice-penetrating radar data. Englacial radar data from Conway Ridge reveal smooth, surface conformal layers overlying disrupted stratigraphy that suggest the van der Veen Ice Stream was 40 km wider over 3000 years ago. Englacial layer dating indicates that the ice stream narrowed to its present configuration between $\\sim3000$ and $\\sim1000$ years ago. Similarly disrupted stratigraphy and buried crevasses suggest that ice flowing from Mercer to Whillans Ice Stream across the northwestern tip of the ridge slowed shortly after. Using an ice-flow model capable of simulating shear margin migration, we evaluate whether small changes in ice thickness can lead to large changes in shear margin location. Our results suggest that the tip of Conway Ridge is sensitive to thinning and thickening, and that when the basal strength at the tip of the ridge increases with the height above flotation, the ice sheet shear margins can change quickly.", "east": -130.0, "geometry": ["POINT(-140 -84.25)"], "keywords": "Antarctica; Cryosphere; Siple Coast", "locations": "Siple Coast; Antarctica", "north": -83.5, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Hoffman, Andrew; Conway, Howard; Christianson, Knut", "project_titles": "Glacial History of Ridge AB, West Antarctica", "projects": [{"proj_uid": "p0010470", "repository": "USAP-DC", "title": "Glacial History of Ridge AB, West Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -85.0, "title": "Impulse HF radar data from Conway Ridge", "uid": "601810", "west": -150.0}, {"awards": "0958658 Bell, Robin; 1443534 Bell, Robin; 1444690 Bell, Robin", "bounds_geometry": ["POLYGON((-180 -77,-177 -77,-174 -77,-171 -77,-168 -77,-165 -77,-162 -77,-159 -77,-156 -77,-153 -77,-150 -77,-150 -77.9,-150 -78.8,-150 -79.7,-150 -80.6,-150 -81.5,-150 -82.4,-150 -83.3,-150 -84.2,-150 -85.1,-150 -86,-153 -86,-156 -86,-159 -86,-162 -86,-165 -86,-168 -86,-171 -86,-174 -86,-177 -86,180 -86,178.1 -86,176.2 -86,174.3 -86,172.4 -86,170.5 -86,168.6 -86,166.7 -86,164.8 -86,162.9 -86,161 -86,161 -85.1,161 -84.2,161 -83.3,161 -82.4,161 -81.5,161 -80.6,161 -79.7,161 -78.8,161 -77.9,161 -77,162.9 -77,164.8 -77,166.7 -77,168.6 -77,170.5 -77,172.4 -77,174.3 -77,176.2 -77,178.1 -77,-180 -77))"], "date_created": "Wed, 22 May 2024 00:00:00 GMT", "description": "This Shallow Ice Radar (SIR) dataset is from the Frequency Modulated Continuous Wave (LFMCW) radar system on board the IcePod while deployed with the ROSETTA-Ice project during the austral summers of November 2015 - December 2017. SIR data was collected along the ROSETTA-Ice Survey Grid where possible. More detailed information is included in the ReadMe. This data was processed at Lamont-Doherty Earth Observatory using MATLAB scripts developed in-house by Tejendra Dhakal and Nicholas Frearson, using CReSIS 2013/14 MCoRDS scripts as a foundation. All levels of processed data are Matfiles as a result.\r\nIncluded in this dataset are the following: \r\n* SIR level1a Matfiles separated by ROSETTA-Ice Survey Grid Line Number;\r\n* SIR long-line images at 300dpi (PNGs) for easy data viewing, rendered in MATLAB from level1 data;\r\n* SIR internal reflector digitization picks (CSV), rendered manually using MATLAB picking scripts;\r\n* SIR digitization frame images (picked and un-picked) as JPGs output from picking process", "east": -150.0, "geometry": ["POINT(-174.5 -81.5)"], "keywords": "Antarctica; Cryosphere; Remote Sensing; Ross Ice Shelf", "locations": "Ross Ice Shelf; Antarctica", "north": -77.0, "nsf_funding_programs": "Antarctic Integrated System Science; Antarctic Instrumentation and Support; Antarctic Astrophysics and Geospace Sciences", "persons": "Cordero, Isabel; Frearson, Nicholas; Dhakal, Tejendra; Bertinato, Christopher; Chu, Winnie; Keeshin, Skye; Wearing, Martin; Spergel, Julian; Packard, Sarah; Dong, LingLing; Das, Indrani; Bell, Robin", "project_titles": "Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE); Development of an Ice Imaging System for Monitoring Changing Ice Sheets Mounted on the NYANG LC-130", "projects": [{"proj_uid": "p0010462", "repository": "USAP-DC", "title": "Development of an Ice Imaging System for Monitoring Changing Ice Sheets Mounted on the NYANG LC-130"}, {"proj_uid": "p0010035", "repository": "USAP-DC", "title": "Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -86.0, "title": "Shallow Ice Radar (SIR) Dataset from Ross Ice Shelf (ROSETTA-Ice)", "uid": "601794", "west": 161.0}, {"awards": "1443534 Bell, Robin; 0958658 Bell, Robin; 1444690 Bell, Robin", "bounds_geometry": ["POLYGON((-180 -77,-177 -77,-174 -77,-171 -77,-168 -77,-165 -77,-162 -77,-159 -77,-156 -77,-153 -77,-150 -77,-150 -77.9,-150 -78.8,-150 -79.7,-150 -80.6,-150 -81.5,-150 -82.4,-150 -83.3,-150 -84.2,-150 -85.1,-150 -86,-153 -86,-156 -86,-159 -86,-162 -86,-165 -86,-168 -86,-171 -86,-174 -86,-177 -86,180 -86,178.1 -86,176.2 -86,174.3 -86,172.4 -86,170.5 -86,168.6 -86,166.7 -86,164.8 -86,162.9 -86,161 -86,161 -85.1,161 -84.2,161 -83.3,161 -82.4,161 -81.5,161 -80.6,161 -79.7,161 -78.8,161 -77.9,161 -77,162.9 -77,164.8 -77,166.7 -77,168.6 -77,170.5 -77,172.4 -77,174.3 -77,176.2 -77,178.1 -77,-180 -77))"], "date_created": "Mon, 20 May 2024 00:00:00 GMT", "description": "This Deep ICE (DICE) radar dataset is from the pulse-chirp depth sounding radar system on board the IcePod while deployed with the ROSETTA-Ice Project during the austral summers of November 2015 - December 2017. DICE data was collected along the ROSETTA-Ice Survey grid where possible. More detailed information is included in the ReadMe, including flight lines with data loss. DICE is a dual channel sensor with pulse-chirp rate of 1us and 3us, which means the data can be processed in four pulse/channel configurations: 1usCh1, 3usCh1, 1usCh2, and 3usCh2. The included dataset is 3usCh1 DICE, which is the preferred configuration. The preferred configuration is 3usCh1, which is included in this dataset. This data was processed at Lamont-Doherty Earth Observatory using MATLAB scripts developed in-house by Tejendra Dhakal and Nicholas Frearson, with CReSIS 2014 MCoRDS scripts as a foundation. As such, all processed levels of this data product are Matfiles. Included in this dataset are the following:\r\n* DICE level2a data Matfiles, separated by ROSETTA-Ice Survey Grid Line Number;\r\n* DICE long-line images at 300dpi (PNGs) for easy data viewing rendered in MATLAB from level2 data;\r\n* DICE Ice Base digitization picks, rendered manually using MATLAB picking script;\r\n* DICE digitization frame images (picked and un-picked) as JPGs output from picking process", "east": -150.0, "geometry": ["POINT(-174.5 -81.5)"], "keywords": "Airborne Radar; Antarctica; Cryosphere; Ice Thickness; Remote Sensing; Ross Ice Shelf", "locations": "Antarctica; Ross Ice Shelf", "north": -77.0, "nsf_funding_programs": "Antarctic Instrumentation and Support; Antarctic Astrophysics and Geospace Sciences; Antarctic Integrated System Science", "persons": "Cordero, Isabel; Frearson, Nicholas; Dhakal, Tejendra; Bertinato, Christopher; Millstein, Joanna; Wilner, Joel; Dong, LingLing; Das, Indrani; Spergel, Julian; Chu, Winnie; Bell, Robin", "project_titles": "Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE); Development of an Ice Imaging System for Monitoring Changing Ice Sheets Mounted on the NYANG LC-130", "projects": [{"proj_uid": "p0010035", "repository": "USAP-DC", "title": "Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE)"}, {"proj_uid": "p0010462", "repository": "USAP-DC", "title": "Development of an Ice Imaging System for Monitoring Changing Ice Sheets Mounted on the NYANG LC-130"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -86.0, "title": "Deep ICE (DICE) Radar Dataset from Ross Ice Shelf (ROSETTA-Ice)", "uid": "601789", "west": 161.0}, {"awards": "2019719 Brook, Edward", "bounds_geometry": ["POLYGON((50 -84,55 -84,60 -84,65 -84,70 -84,75 -84,80 -84,85 -84,90 -84,95 -84,100 -84,100 -84.6,100 -85.2,100 -85.8,100 -86.4,100 -87,100 -87.6,100 -88.2,100 -88.8,100 -89.4,100 -90,95 -90,90 -90,85 -90,80 -90,75 -90,70 -90,65 -90,60 -90,55 -90,50 -90,50 -89.4,50 -88.8,50 -88.2,50 -87.6,50 -87,50 -86.4,50 -85.8,50 -85.2,50 -84.6,50 -84))"], "date_created": "Mon, 19 Feb 2024 00:00:00 GMT", "description": "This dataset constitutes the as-recorded echo data from the MARFA radar system. The data was recorded by a National Instruments acquisition system, simultaneously with GPS, magnetics, laser range data, outside air temperature and IMU data. The data was acquired using the Environment for Linked Serial Acquisition (ELSA).\r\n\r\nThe data is provided in two forms: \r\n\u2022 Flight based and as recorded on the aircraft in raw packets\r\n\u2022 Transect based, reorganized into transects corresponding to the survey design, and demultiplexed into text tables and flat binary files.\r\n", "east": 100.0, "geometry": ["POINT(75 -87)"], "keywords": "Antarctica; Coldex; East Antarctic Plateau; Glaciology; Radar Echo Sounder", "locations": "Antarctica; East Antarctic Plateau", "north": -84.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Young, Duncan A.; Blankenship, Donald D.; Greenbaum, Jamin; Kerr, Megan; Buhl, Dillon; Ng, Gregory; Kempf, Scott D.; Chan, Kristian", "project_titles": "Center for Oldest Ice Exploration", "projects": [{"proj_uid": "p0010321", "repository": "USAP-DC", "title": "Center for Oldest Ice Exploration"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "COLDEX", "south": -90.0, "title": "NSF COLDEX Raw MARFA Ice Penetrating Radar data", "uid": "601768", "west": 50.0}, {"awards": "1744649 Christianson, Knut", "bounds_geometry": ["POLYGON((-110.338 -85.76,-109.5454 -85.76,-108.7528 -85.76,-107.9602 -85.76,-107.1676 -85.76,-106.375 -85.76,-105.5824 -85.76,-104.7898 -85.76,-103.9972 -85.76,-103.2046 -85.76,-102.412 -85.76,-102.412 -85.8266,-102.412 -85.89320000000001,-102.412 -85.9598,-102.412 -86.02640000000001,-102.412 -86.093,-102.412 -86.1596,-102.412 -86.2262,-102.412 -86.2928,-102.412 -86.35940000000001,-102.412 -86.426,-103.2046 -86.426,-103.9972 -86.426,-104.7898 -86.426,-105.5824 -86.426,-106.375 -86.426,-107.1676 -86.426,-107.9602 -86.426,-108.7528 -86.426,-109.5454 -86.426,-110.338 -86.426,-110.338 -86.35940000000001,-110.338 -86.2928,-110.338 -86.2262,-110.338 -86.1596,-110.338 -86.093,-110.338 -86.02640000000001,-110.338 -85.9598,-110.338 -85.89320000000001,-110.338 -85.8266,-110.338 -85.76))"], "date_created": "Mon, 09 Oct 2023 00:00:00 GMT", "description": "Phase-sensitive radar data collected at Hercules Dome, Antarctica. These data are processed in two ways for two separate objectives. First, repeat acquisitions between years are interfered to interpret vertical velocity. Second, polarized acquisitions are interfered to interpret crystal orientation fabric. The full processing flow is included to recreate the given data products from the included raw data.", "east": -102.412, "geometry": ["POINT(-106.375 -86.093)"], "keywords": "Antarctica; Apres; Crystal Orientation Fabric; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Hercules Dome; Ice Dynamic; Ice Penetrating Radar; Radar Interferometry; Radar Polarimetry", "locations": "Hercules Dome; Antarctica", "north": -85.76, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Hills, Benjamin; Holschuh, Nicholas; Hoffman, Andrew; Fudge, Tyler J; Horlings, Annika; Erwin, Emma; Steig, Eric J.; Christianson, Knut", "project_titles": "Ice Dynamics at the Intersection of the West and East Antarctic Ice Sheets", "projects": [{"proj_uid": "p0010359", "repository": "USAP-DC", "title": "Ice Dynamics at the Intersection of the West and East Antarctic Ice Sheets"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Hercules Dome Ice Core", "south": -86.426, "title": "Hercules Dome ApRES Data", "uid": "601739", "west": -110.338}, {"awards": "1744649 Christianson, Knut", "bounds_geometry": ["POLYGON((-120 -85.5,-116.67 -85.5,-113.34 -85.5,-110.01 -85.5,-106.68 -85.5,-103.35 -85.5,-100.02000000000001 -85.5,-96.69 -85.5,-93.36 -85.5,-90.03 -85.5,-86.7 -85.5,-86.7 -85.95,-86.7 -86.4,-86.7 -86.85,-86.7 -87.3,-86.7 -87.75,-86.7 -88.2,-86.7 -88.65,-86.7 -89.1,-86.7 -89.55,-86.7 -90,-90.03 -90,-93.36 -90,-96.69 -90,-100.02 -90,-103.35 -90,-106.68 -90,-110.01 -90,-113.34 -90,-116.67 -90,-120 -90,-120 -89.55,-120 -89.1,-120 -88.65,-120 -88.2,-120 -87.75,-120 -87.3,-120 -86.85,-120 -86.4,-120 -85.95,-120 -85.5))"], "date_created": "Fri, 21 Jul 2023 00:00:00 GMT", "description": "This dataset consists of gridded basal topographies in the vicinity of Hercules Dome, East Antarctica generated from multi-element ice-penetrating radar data. ", "east": -86.7, "geometry": ["POINT(-103.35 -87.75)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Hercules Dome; Ice Penetrating Radar; Snow/ice; Snow/Ice", "locations": "Hercules Dome; Antarctica; Antarctica", "north": -85.5, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Hoffman, Andrew; Holschuh, Nicholas; Paden, John; Christianson, Knut", "project_titles": "Ice Dynamics at the Intersection of the West and East Antarctic Ice Sheets", "projects": [{"proj_uid": "p0010359", "repository": "USAP-DC", "title": "Ice Dynamics at the Intersection of the West and East Antarctic Ice Sheets"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Hercules Dome Ice Core", "south": -90.0, "title": "Hercules Dome Ice-Penetrating Radar Swath Topographies", "uid": "601711", "west": -120.0}, {"awards": "1744649 Christianson, Knut", "bounds_geometry": ["POLYGON((-120 -85.5,-116.67 -85.5,-113.34 -85.5,-110.01 -85.5,-106.68 -85.5,-103.35 -85.5,-100.02000000000001 -85.5,-96.69 -85.5,-93.36 -85.5,-90.03 -85.5,-86.7 -85.5,-86.7 -85.95,-86.7 -86.4,-86.7 -86.85,-86.7 -87.3,-86.7 -87.75,-86.7 -88.2,-86.7 -88.65,-86.7 -89.1,-86.7 -89.55,-86.7 -90,-90.03 -90,-93.36 -90,-96.69 -90,-100.02 -90,-103.35 -90,-106.68 -90,-110.01 -90,-113.34 -90,-116.67 -90,-120 -90,-120 -89.55,-120 -89.1,-120 -88.65,-120 -88.2,-120 -87.75,-120 -87.3,-120 -86.85,-120 -86.4,-120 -85.95,-120 -85.5))"], "date_created": "Thu, 20 Jul 2023 00:00:00 GMT", "description": "This dataset contains high-frequency impulse radar data collected at western Hercules Dome in East Antarctica.", "east": -86.7, "geometry": ["POINT(-103.35 -87.75)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Hercules Dome; Ice Penetrating Radar; Snow/ice; Snow/Ice", "locations": "Hercules Dome; Antarctica; Antarctica", "north": -85.5, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Hoffman, Andrew; Christianson, Knut; Hills, Benjamin; Christian, John; Holschuh, Nicholas; Horlings, Annika; O\u0027Connor, Gemma", "project_titles": "Ice Dynamics at the Intersection of the West and East Antarctic Ice Sheets", "projects": [{"proj_uid": "p0010359", "repository": "USAP-DC", "title": "Ice Dynamics at the Intersection of the West and East Antarctic Ice Sheets"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Hercules Dome Ice Core", "south": -90.0, "title": "Hercules Dome High-Frequency Impulse Ice-Penetrating Radar Data", "uid": "601710", "west": -120.0}, {"awards": "1744649 Christianson, Knut", "bounds_geometry": ["POLYGON((-120 -85.5,-116.67 -85.5,-113.34 -85.5,-110.01 -85.5,-106.68 -85.5,-103.35 -85.5,-100.02000000000001 -85.5,-96.69 -85.5,-93.36 -85.5,-90.03 -85.5,-86.7 -85.5,-86.7 -85.95,-86.7 -86.4,-86.7 -86.85,-86.7 -87.3,-86.7 -87.75,-86.7 -88.2,-86.7 -88.65,-86.7 -89.1,-86.7 -89.55,-86.7 -90,-90.03 -90,-93.36 -90,-96.69 -90,-100.02 -90,-103.35 -90,-106.68 -90,-110.01 -90,-113.34 -90,-116.67 -90,-120 -90,-120 -89.55,-120 -89.1,-120 -88.65,-120 -88.2,-120 -87.75,-120 -87.3,-120 -86.85,-120 -86.4,-120 -85.95,-120 -85.5))"], "date_created": "Thu, 20 Jul 2023 00:00:00 GMT", "description": "This dataset contains high-frequency impulse radar data collected by the United States portion of the International TransAntarctic Scientific Expedition (ITASE) 2001-2002 traverse from the vicinity of Hercules Dome, Antarctica to the South Pole. ", "east": -86.7, "geometry": ["POINT(-103.35 -87.75)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Hercules Dome; Ice Penetrating Radar; Snow/ice; Snow/Ice", "locations": "Antarctica; Antarctica; Hercules Dome", "north": -85.5, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Hoffman, Andrew; Welch, Brian; Jacobel, Robert; Christianson, Knut", "project_titles": "Ice Dynamics at the Intersection of the West and East Antarctic Ice Sheets", "projects": [{"proj_uid": "p0010359", "repository": "USAP-DC", "title": "Ice Dynamics at the Intersection of the West and East Antarctic Ice Sheets"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Hercules Dome Ice Core", "south": -90.0, "title": "ITASE Impulse Radar Hercules Dome to South Pole", "uid": "601712", "west": -120.0}, {"awards": "1141866 Conway, Howard", "bounds_geometry": ["POLYGON((-176 -83.5,-175.2 -83.5,-174.4 -83.5,-173.6 -83.5,-172.8 -83.5,-172 -83.5,-171.2 -83.5,-170.4 -83.5,-169.6 -83.5,-168.8 -83.5,-168 -83.5,-168 -83.55,-168 -83.6,-168 -83.65,-168 -83.7,-168 -83.75,-168 -83.8,-168 -83.85,-168 -83.9,-168 -83.95,-168 -84,-168.8 -84,-169.6 -84,-170.4 -84,-171.2 -84,-172 -84,-172.8 -84,-173.6 -84,-174.4 -84,-175.2 -84,-176 -84,-176 -83.95,-176 -83.9,-176 -83.85,-176 -83.8,-176 -83.75,-176 -83.7,-176 -83.65,-176 -83.6,-176 -83.55,-176 -83.5))"], "date_created": "Thu, 20 Jul 2023 00:00:00 GMT", "description": "This dataset contains high-frequency impulse radar data collected in the vicinity of the Beardmore Glacier grounding zone. ", "east": -168.0, "geometry": ["POINT(-172 -83.75)"], "keywords": "Antarctica; Beardmore Glacier; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Ice Penetrating Radar; Snow/ice; Snow/Ice", "locations": "Beardmore Glacier; Antarctica; Antarctica", "north": -83.5, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Hoffman, Andrew; Christianson, Knut; Conway, Howard", "project_titles": "Collaborative Research: East Antarctic Outlet Glacier Dynamics", "projects": [{"proj_uid": "p0000437", "repository": "USAP-DC", "title": "Collaborative Research: East Antarctic Outlet Glacier Dynamics"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -84.0, "title": "Beardmore Glacier High-Frequency Impulse Radar Data", "uid": "601713", "west": -176.0}, {"awards": "2019719 Brook, Edward", "bounds_geometry": ["POLYGON((159.17 -76.67,159.195 -76.67,159.22 -76.67,159.24499999999998 -76.67,159.26999999999998 -76.67,159.295 -76.67,159.32 -76.67,159.345 -76.67,159.36999999999998 -76.67,159.39499999999998 -76.67,159.42 -76.67,159.42 -76.676,159.42 -76.682,159.42 -76.688,159.42 -76.694,159.42 -76.7,159.42 -76.706,159.42 -76.712,159.42 -76.718,159.42 -76.724,159.42 -76.73,159.39499999999998 -76.73,159.36999999999998 -76.73,159.345 -76.73,159.32 -76.73,159.295 -76.73,159.26999999999998 -76.73,159.24499999999998 -76.73,159.22 -76.73,159.195 -76.73,159.17 -76.73,159.17 -76.724,159.17 -76.718,159.17 -76.712,159.17 -76.706,159.17 -76.7,159.17 -76.694,159.17 -76.688,159.17 -76.682,159.17 -76.676,159.17 -76.67))"], "date_created": "Fri, 16 Jun 2023 00:00:00 GMT", "description": "This unpublished report describes field activities in the 2022-23 Antarctic field season by the I-188 group within COLDEX. The main purpose of this work was to identify the final coring site for a proposed 1250 m ice core. ", "east": 159.42, "geometry": ["POINT(159.295 -76.7)"], "keywords": "Allan Hills; Antarctica; Apres; Ice Core; Ice Penetrating Radar; Temperature Profiles", "locations": "Allan Hills; Antarctica", "north": -76.67, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Conway, Howard; Brook, Edward J.", "project_titles": "Center for Oldest Ice Exploration", "projects": [{"proj_uid": "p0010321", "repository": "USAP-DC", "title": "Center for Oldest Ice Exploration"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "COLDEX", "south": -76.73, "title": "2022-23 Allan Hills Intermediate Ice Core Site Selection Field Report", "uid": "601697", "west": 159.17}, {"awards": "1739003 Holland, David", "bounds_geometry": ["POLYGON((-114.2703 -66.8445,-109.54270000000001 -66.8445,-104.8151 -66.8445,-100.0875 -66.8445,-95.35990000000001 -66.8445,-90.6323 -66.8445,-85.9047 -66.8445,-81.1771 -66.8445,-76.4495 -66.8445,-71.7219 -66.8445,-66.9943 -66.8445,-66.9943 -67.98911,-66.9943 -69.13372,-66.9943 -70.27833,-66.9943 -71.42294,-66.9943 -72.56755,-66.9943 -73.71216,-66.9943 -74.85677,-66.9943 -76.00138,-66.9943 -77.14599,-66.9943 -78.2906,-71.72189999999999 -78.2906,-76.4495 -78.2906,-81.1771 -78.2906,-85.90469999999999 -78.2906,-90.6323 -78.2906,-95.3599 -78.2906,-100.0875 -78.2906,-104.8151 -78.2906,-109.5427 -78.2906,-114.2703 -78.2906,-114.2703 -77.14599,-114.2703 -76.00138,-114.2703 -74.85677,-114.2703 -73.71216,-114.2703 -72.56755,-114.2703 -71.42294,-114.2703 -70.27833,-114.2703 -69.13372,-114.2703 -67.98911,-114.2703 -66.8445))"], "date_created": "Tue, 28 Mar 2023 00:00:00 GMT", "description": "Data products (radar echogram images and ice surface and ice bottom tracking) from the two ITGC MELT Accumulation Radar campaigns at Thwaites Glacier.", "east": -66.9943, "geometry": ["POINT(-90.6323 -72.56755)"], "keywords": "Antarctica; Ice Base; Ice Penetrating Radar; Ice Surface; Radar Echo Sounder; Thwaites Glacier", "locations": "Thwaites Glacier; Antarctica", "north": -66.8445, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Paden, John", "project_titles": null, "projects": null, "repositories": null, "science_programs": "Thwaites (ITGC)", "south": -78.2906, "title": "MELT 2018-2020 Accumulation Radar at Thwaites", "uid": "601678", "west": -114.2703}, {"awards": "2317097 Venturelli, Ryan", "bounds_geometry": ["POLYGON((-99.793 -74.857,-99.7882 -74.857,-99.7834 -74.857,-99.77860000000001 -74.857,-99.77380000000001 -74.857,-99.769 -74.857,-99.7642 -74.857,-99.7594 -74.857,-99.75460000000001 -74.857,-99.74980000000001 -74.857,-99.745 -74.857,-99.745 -74.8583,-99.745 -74.8596,-99.745 -74.8609,-99.745 -74.8622,-99.745 -74.8635,-99.745 -74.8648,-99.745 -74.8661,-99.745 -74.8674,-99.745 -74.8687,-99.745 -74.87,-99.74980000000001 -74.87,-99.75460000000001 -74.87,-99.7594 -74.87,-99.7642 -74.87,-99.769 -74.87,-99.77380000000001 -74.87,-99.77860000000001 -74.87,-99.7834 -74.87,-99.7882 -74.87,-99.793 -74.87,-99.793 -74.8687,-99.793 -74.8674,-99.793 -74.8661,-99.793 -74.8648,-99.793 -74.8635,-99.793 -74.8622,-99.793 -74.8609,-99.793 -74.8596,-99.793 -74.8583,-99.793 -74.857))"], "date_created": "Fri, 24 Mar 2023 00:00:00 GMT", "description": "This data set contains unprocessed radar profiles collected with a GSSI 200 MHz Hyperstacking antenna near Winkie Nunatak, West Antarctica. This data was collected to estimate depth-to-bedrock along a subglacial ridge line at depths between 20 - 120 meters. ", "east": -99.745, "geometry": ["POINT(-99.769 -74.8635)"], "keywords": "Antarctica; Ice Penetrating Radar; Pine Island Glacier; Subglacial Bedrock", "locations": "Pine Island Glacier; Antarctica", "north": -74.857, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Braddock, Scott", "project_titles": "NSF-NERC: Geological History Constraints on the Magnitude of Grounding Line Retreat in the Thwaites Glacier System", "projects": [{"proj_uid": "p0010165", "repository": "USAP-DC", "title": "NSF-NERC: Geological History Constraints on the Magnitude of Grounding Line Retreat in the Thwaites Glacier System"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -74.87, "title": "200 MHz ground-penetrating radar from Winkie Nunatak, West Antarctica", "uid": "601677", "west": -99.793}, {"awards": "2019597 Besson, Dave; 2112352 Vieregg, Abigail; 2118315 Vieregg, Abigail", "bounds_geometry": ["POLYGON((-180 72.5797,-158.15409 72.5797,-136.30818 72.5797,-114.46227 72.5797,-92.61636 72.5797,-70.77045 72.5797,-48.92454000000001 72.5797,-27.078630000000004 72.5797,-5.23272 72.5797,16.613190000000003 72.5797,38.4591 72.5797,38.4591 72.57968,38.4591 72.57966,38.4591 72.57964,38.4591 72.57962,38.4591 72.5796,38.4591 72.57957999999999,38.4591 72.57956,38.4591 72.57954,38.4591 72.57952,38.4591 72.5795,16.61319 72.5795,-5.23272 72.5795,-27.078629999999997 72.5795,-48.92454 72.5795,-70.77045000000001 72.5795,-92.61635999999999 72.5795,-114.46226999999999 72.5795,-136.30818 72.5795,-158.15409 72.5795,180 72.5795,165.84593 72.5795,151.69186 72.5795,137.53779 72.5795,123.38372 72.5795,109.22964999999999 72.5795,95.07558 72.5795,80.92151 72.5795,66.76744 72.5795,52.61336999999999 72.5795,38.4593 72.5795,38.4593 72.57952,38.4593 72.57954,38.4593 72.57956,38.4593 72.57957999999999,38.4593 72.5796,38.4593 72.57962,38.4593 72.57964,38.4593 72.57966,38.4593 72.57968,38.4593 72.5797,52.61337 72.5797,66.76744 72.5797,80.92151 72.5797,95.07558 72.5797,109.22965 72.5797,123.38372 72.5797,137.53779 72.5797,151.69186000000002 72.5797,165.84593 72.5797,-180 72.5797))"], "date_created": "Mon, 20 Mar 2023 00:00:00 GMT", "description": "Data collected by RNO-G collaboration, used to calculate attenuation lengths, internal layer reflectivities and bulk refractive index. LPDA transmitter on surface broadcasts ~10-ns high voltage pulse into ice and echoes recorded on similar surface LPDA. Data recorded on digital scope, after averaging 10000 triggers to elucidate weak features.\r\n\r\nFunding for this dataset was provided by NSF Grants and Deutsche Forschungsgemeinschaft (DFG, Grant NE 2031/2-1).", "east": 38.4591, "geometry": ["POINT(-141.5408 72.5796)"], "keywords": "Greenland Ice Cap", "locations": "Greenland Ice Cap", "north": 72.5797, "nsf_funding_programs": null, "persons": "Besson, Dave", "project_titles": null, "projects": null, "repositories": null, "science_programs": null, "south": 72.5795, "title": "Summer 2021 Summit Station radar echo data", "uid": "601676", "west": 38.4593}, {"awards": "1043761 Young, Duncan; 0230197 Holt, John; 2127606 Young, Duncan A.; 0636724 Blankenship, Donald", "bounds_geometry": ["POLYGON((-136 -74,-131.9 -74,-127.8 -74,-123.7 -74,-119.6 -74,-115.5 -74,-111.4 -74,-107.30000000000001 -74,-103.2 -74,-99.1 -74,-95 -74,-95 -74.7,-95 -75.4,-95 -76.1,-95 -76.8,-95 -77.5,-95 -78.2,-95 -78.9,-95 -79.6,-95 -80.3,-95 -81,-99.1 -81,-103.2 -81,-107.3 -81,-111.4 -81,-115.5 -81,-119.6 -81,-123.69999999999999 -81,-127.8 -81,-131.9 -81,-136 -81,-136 -80.3,-136 -79.6,-136 -78.9,-136 -78.2,-136 -77.5,-136 -76.8,-136 -76.1,-136 -75.4,-136 -74.7,-136 -74))"], "date_created": "Wed, 15 Mar 2023 00:00:00 GMT", "description": "This file contains internal radar horizon 1 (lm-MERGE-lay9-grg) for West Antarctica, collected during the SOAR/CASERTZ (1991-1996), SOAR/DVD (1999), ATRS (2001), AGASEA (2004-05) and GIMBLE (2013-2014) expeditions. Only data collected in AGASEA is contained in this specific product.\r\nThis data set is linked to PH.D thesis Muldoon, G. 2018 \"West Antarctic Ice Sheet Retreat during the Last Interglacial\"Spatial and temporal distributions of accumulation rates on the catchment of Thwaites Glacier, West Antarctica\", University of Texas at Austin\r\n https://doi.org/10.15781/T23B5WS0D\r\nThe internal radar horizon (IRH) was traced semi-automatically by Gail R. Muldoon using Haliburtons\u0027s Landmark software and picker, in a combination of 2D focused and unfocused data.\r\nDepths were calculated using a 2 way velocity in ice of 84.5 m/microsecond, and no firn correction. \r\n\r\nIsochron age is 4711 (+/- 246 ) years. \r\n\r\nFunding for this dataset as provided by NSF grants and The G. Unger Vetlesen Foundation.", "east": -95.0, "geometry": ["POINT(-115.5 -77.5)"], "keywords": "Antarchitecture; Antarctica; Ice Penetrating Radar; Isochron; Layers; Radar; Radioglaciology; Thwaites Glacier", "locations": "Thwaites Glacier; Antarctica", "north": -74.0, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Earth Sciences; Antarctic Earth Sciences", "persons": "Muldoon, Gail R.; Young, Duncan A.; Jackson, Charles; Blankenship, Donald D.", "project_titles": "Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica (AGASEA); Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System; Geophysical Investigations of Marie Byrd Land Lithospheric Evolution (GIMBLE)", "projects": [{"proj_uid": "p0000435", "repository": "USAP-DC", "title": "Geophysical Investigations of Marie Byrd Land Lithospheric Evolution (GIMBLE)"}, {"proj_uid": "p0000243", "repository": "USAP-DC", "title": "Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica (AGASEA)"}, {"proj_uid": "p0000174", "repository": "USAP-DC", "title": "Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -81.0, "title": "AGASEA 4.7 ka Englacial Isochron over the Thwaites Glacier Catchment", "uid": "601673", "west": -136.0}, {"awards": "1744993 Higgins, John", "bounds_geometry": ["POLYGON((159.16667 -76.66667,159.19167000000002 -76.66667,159.21667000000002 -76.66667,159.24167 -76.66667,159.26667 -76.66667,159.29167 -76.66667,159.31667000000002 -76.66667,159.34167000000002 -76.66667,159.36667 -76.66667,159.39167 -76.66667,159.41667 -76.66667,159.41667 -76.67333599999999,159.41667 -76.680002,159.41667 -76.686668,159.41667 -76.693334,159.41667 -76.69999999999999,159.41667 -76.706666,159.41667 -76.713332,159.41667 -76.71999799999999,159.41667 -76.726664,159.41667 -76.73333,159.39167 -76.73333,159.36667 -76.73333,159.34167000000002 -76.73333,159.31667000000002 -76.73333,159.29167 -76.73333,159.26667 -76.73333,159.24167 -76.73333,159.21667000000002 -76.73333,159.19167000000002 -76.73333,159.16667 -76.73333,159.16667 -76.726664,159.16667 -76.71999799999999,159.16667 -76.713332,159.16667 -76.706666,159.16667 -76.69999999999999,159.16667 -76.693334,159.16667 -76.686668,159.16667 -76.680002,159.16667 -76.67333599999999,159.16667 -76.66667))"], "date_created": "Fri, 03 Mar 2023 00:00:00 GMT", "description": "This document details the ground-penetrating radar (GPR) collection activities carried out by I. Nesbitt in the Allan Hills during the 2019-2020 field season. This document is intended as an informal catalogue of the fild work and post-processing activities performed at the Allan Hills and later at McMurdo and elsewhere. It contains preliminary post-processing and analysis only. Any interpretation made and presented in this report based on the data herein is subject to change pending further examination. GPR was used to examine sub-ice bedrock topography and the stratigraphic relationship between two shallow ice core drill sites (CMC1 and CMC2), as well as to explore potential future drill sites. In accordance with. the project\u0027s objective to drill and analyze ancient ice at relatively shallow depths, the two main features of interest in this study are 1) bedrock topographic features in which ancient ice could be trapped, and 2) englacial stratigraphic layers, especially those which may represent large age discontinuities.", "east": 159.41667, "geometry": ["POINT(159.29167 -76.69999999999999)"], "keywords": "Allan Hills; Antarctica; GPR; Ice Core; Report", "locations": "Antarctica; Allan Hills", "north": -76.66667, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Nesbitt, Ian; Brook, Edward J.", "project_titles": "Center for Oldest Ice Exploration; Collaborative research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area ", "projects": [{"proj_uid": "p0010321", "repository": "USAP-DC", "title": "Center for Oldest Ice Exploration"}, {"proj_uid": "p0010253", "repository": "USAP-DC", "title": "Collaborative research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area "}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.73333, "title": "I-165-M GPR Field Report 2019-2020", "uid": "601669", "west": 159.16667}, {"awards": "1443260 Conway, Howard", "bounds_geometry": ["POLYGON((159 -76.68,159.03 -76.68,159.06 -76.68,159.09 -76.68,159.12 -76.68,159.15 -76.68,159.18 -76.68,159.21 -76.68,159.24 -76.68,159.27 -76.68,159.3 -76.68,159.3 -76.697,159.3 -76.714,159.3 -76.73100000000001,159.3 -76.748,159.3 -76.765,159.3 -76.782,159.3 -76.79899999999999,159.3 -76.816,159.3 -76.833,159.3 -76.85,159.27 -76.85,159.24 -76.85,159.21 -76.85,159.18 -76.85,159.15 -76.85,159.12 -76.85,159.09 -76.85,159.06 -76.85,159.03 -76.85,159 -76.85,159 -76.833,159 -76.816,159 -76.79899999999999,159 -76.782,159 -76.765,159 -76.748,159 -76.73100000000001,159 -76.714,159 -76.697,159 -76.68))"], "date_created": "Fri, 03 Mar 2023 00:00:00 GMT", "description": "This document details the ground penetrating radar (GPR) collection activities carried out by S.\r\nMackay (with assistance from the I-165 field team) in the Allan Hills during the 2015-2016 field\r\nseason. This document is intended as an informal catalogue of field activities, GPS data points,\r\nGPR survey line locations, and initial observations / preliminary analysis. It does not contain\r\ndetailed analysis beyond standard radar post-processing the migration of a subset of radar lines.", "east": 159.3, "geometry": ["POINT(159.15 -76.765)"], "keywords": "Allan Hills; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; GPR; Ice Core; Report", "locations": "Antarctica; Allan Hills", "north": -76.68, "nsf_funding_programs": "Antarctic Glaciology", "persons": "MacKay, Sean; Brook, Edward J.", "project_titles": "Collaborative Research: Allan HILLs Englacial Site (AHILLES) Selection", "projects": [{"proj_uid": "p0000385", "repository": "USAP-DC", "title": "Collaborative Research: Allan HILLs Englacial Site (AHILLES) Selection"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.85, "title": "2015-2016 GPR Field Report for Allan Hills Shallow Ice Coring", "uid": "601668", "west": 159.0}, {"awards": "2152622 Morlighem, Mathieu", "bounds_geometry": ["POLYGON((-110 -74,-109 -74,-108 -74,-107 -74,-106 -74,-105 -74,-104 -74,-103 -74,-102 -74,-101 -74,-100 -74,-100 -74.3,-100 -74.6,-100 -74.9,-100 -75.2,-100 -75.5,-100 -75.8,-100 -76.1,-100 -76.4,-100 -76.7,-100 -77,-101 -77,-102 -77,-103 -77,-104 -77,-105 -77,-106 -77,-107 -77,-108 -77,-109 -77,-110 -77,-110 -76.7,-110 -76.4,-110 -76.1,-110 -75.8,-110 -75.5,-110 -75.2,-110 -74.9,-110 -74.6,-110 -74.3,-110 -74))"], "date_created": "Wed, 25 Jan 2023 00:00:00 GMT", "description": "Data resulting from comparing model and observations of sliding-law parameter and airborne radar-derived basal reflectivity underneath Thwaites Glacier, Antarctica", "east": -100.0, "geometry": ["POINT(-105 -75.5)"], "keywords": "Airborne Radar; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Thwaites; Thwaites Glacier", "locations": "Thwaites Glacier; Thwaites; Antarctica", "north": -74.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Das, Indrani", "project_titles": "NSF-NERC: PROcesses, drivers, Predictions: Modeling the response of Thwaites Glacier over the next Century using Ice/Ocean Coupled Models (PROPHET)", "projects": [{"proj_uid": "p0010400", "repository": "USAP-DC", "title": "NSF-NERC: PROcesses, drivers, Predictions: Modeling the response of Thwaites Glacier over the next Century using Ice/Ocean Coupled Models (PROPHET)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Thwaites (ITGC)", "south": -77.0, "title": "Sliding-Law Parameter and Airborne Radar-Derived Basal Reflectivity Data Underneath Thwaites Glacier, Antarctica", "uid": "601658", "west": -110.0}, {"awards": "1644197 Simms, Alexander", "bounds_geometry": null, "date_created": "Mon, 19 Dec 2022 00:00:00 GMT", "description": "This dataset provides the raw and processed ground-penetrating radar (GPR) data collected on Joinville Island in the Antarctic Peninsula. ", "east": null, "geometry": null, "keywords": "Antarctica; Joinville Island", "locations": "Antarctica; Joinville Island", "north": null, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Simms, Alexander", "project_titles": "Collaborative Research: New Constraints on Post-Glacial Rebound and Holocene Environmental History along the Northern Antarctic Peninsula from Raised Beaches", "projects": [{"proj_uid": "p0010132", "repository": "USAP-DC", "title": "Collaborative Research: New Constraints on Post-Glacial Rebound and Holocene Environmental History along the Northern Antarctic Peninsula from Raised Beaches"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Ground Penetrating Radar Profiles from Beaches on Joinville Island, Antarctic Peninsula", "uid": "601632", "west": null}, {"awards": "1644197 Simms, Alexander", "bounds_geometry": null, "date_created": "Mon, 19 Dec 2022 00:00:00 GMT", "description": "This dataset includes ground-penetrating radar (GPR) data collected on Livingston Island in the Antarctic Peninsula.", "east": null, "geometry": null, "keywords": "Antarctica; Joinville Island", "locations": "Antarctica; Joinville Island", "north": null, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Simms, Alexander", "project_titles": "Collaborative Research: New Constraints on Post-Glacial Rebound and Holocene Environmental History along the Northern Antarctic Peninsula from Raised Beaches", "projects": [{"proj_uid": "p0010132", "repository": "USAP-DC", "title": "Collaborative Research: New Constraints on Post-Glacial Rebound and Holocene Environmental History along the Northern Antarctic Peninsula from Raised Beaches"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": null, "title": "Ground-Penetrating Radar data from Livingston Island in the Antarctic Peninsula", "uid": "601633", "west": null}, {"awards": "1744649 Christianson, Knut", "bounds_geometry": ["POLYGON((-120 -85.5,-116.67 -85.5,-113.34 -85.5,-110.01 -85.5,-106.68 -85.5,-103.35 -85.5,-100.02000000000001 -85.5,-96.69 -85.5,-93.36 -85.5,-90.03 -85.5,-86.7 -85.5,-86.7 -85.95,-86.7 -86.4,-86.7 -86.85,-86.7 -87.3,-86.7 -87.75,-86.7 -88.2,-86.7 -88.65,-86.7 -89.1,-86.7 -89.55,-86.7 -90,-90.03 -90,-93.36 -90,-96.69 -90,-100.02 -90,-103.35 -90,-106.68 -90,-110.01 -90,-113.34 -90,-116.67 -90,-120 -90,-120 -89.55,-120 -89.1,-120 -88.65,-120 -88.2,-120 -87.75,-120 -87.3,-120 -86.85,-120 -86.4,-120 -85.95,-120 -85.5))"], "date_created": "Wed, 07 Sep 2022 00:00:00 GMT", "description": "This dataset contains high-frequency impulse radar data collected at western Hercules Dome in East Antarctica. ", "east": -86.7, "geometry": ["POINT(-103.35 -87.75)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Ice Penetrating Radar; Snow/ice; Snow/Ice", "locations": "Antarctica", "north": -85.5, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Christianson, Knut", "project_titles": "Ice Dynamics at the Intersection of the West and East Antarctic Ice Sheets", "projects": [{"proj_uid": "p0010359", "repository": "USAP-DC", "title": "Ice Dynamics at the Intersection of the West and East Antarctic Ice Sheets"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Ice Dynamics at the Intersection of the West and East Antarctic Ice Sheets", "uid": "601606", "west": -120.0}, {"awards": "0733025 Blankenship, Donald", "bounds_geometry": ["POLYGON((153 -79,153.9 -79,154.8 -79,155.7 -79,156.6 -79,157.5 -79,158.4 -79,159.3 -79,160.2 -79,161.1 -79,162 -79,162 -79.14,162 -79.28,162 -79.42,162 -79.56,162 -79.7,162 -79.84,162 -79.98,162 -80.12,162 -80.26,162 -80.4,161.1 -80.4,160.2 -80.4,159.3 -80.4,158.4 -80.4,157.5 -80.4,156.6 -80.4,155.7 -80.4,154.8 -80.4,153.9 -80.4,153 -80.4,153 -80.26,153 -80.12,153 -79.98,153 -79.84,153 -79.7,153 -79.56,153 -79.42,153 -79.28,153 -79.14,153 -79))"], "date_created": "Fri, 02 Sep 2022 00:00:00 GMT", "description": "HiCARS data collected over Darwin and Hatherton Glaciers during ICECAP Test Flight ICP1/F05", "east": 162.0, "geometry": ["POINT(157.5 -79.7)"], "keywords": "Airborne Radar; Antarctica; Basler; Darwin Glacier; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Hatherton Glacier; Hicars; ICECAP; Ice Penetrating Radar; Ice Thickness; Transantarctic Mountains", "locations": "Darwin Glacier; Transantarctic Mountains; Hatherton Glacier; Antarctica", "north": -79.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Gillespie, Mette; Blankenship, Donald D.; Young, Duncan A.; Siegert, Martin; Holt, John W.; Greenbaum, Jamin; Schroeder, Dustin", "project_titles": "IPY Research: Investigating the Cryospheric Evolution of the Central Antarctic Plate (ICECAP)", "projects": [{"proj_uid": "p0000719", "repository": "USAP-DC", "title": "IPY Research: Investigating the Cryospheric Evolution of the Central Antarctic Plate (ICECAP)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.4, "title": "ICECAP ice thickness data over the Darwin and Hatherton Glaciers, Transantarctic Mountains, Antarctica", "uid": "601605", "west": 153.0}, {"awards": "9319379 Blankenship, Donald", "bounds_geometry": ["POLYGON((150 -81.9,152.1 -81.9,154.2 -81.9,156.3 -81.9,158.4 -81.9,160.5 -81.9,162.6 -81.9,164.7 -81.9,166.8 -81.9,168.9 -81.9,171 -81.9,171 -82.06,171 -82.22,171 -82.38000000000001,171 -82.54,171 -82.7,171 -82.86,171 -83.02,171 -83.18,171 -83.34,171 -83.5,168.9 -83.5,166.8 -83.5,164.7 -83.5,162.6 -83.5,160.5 -83.5,158.4 -83.5,156.3 -83.5,154.2 -83.5,152.1 -83.5,150 -83.5,150 -83.34,150 -83.18,150 -83.02,150 -82.86,150 -82.7,150 -82.54,150 -82.38000000000001,150 -82.22,150 -82.06,150 -81.9))"], "date_created": "Thu, 01 Sep 2022 00:00:00 GMT", "description": "The RGB survey is a single line flown up Robb Glacier. Laser altimetry, ice-penetrating radar, gravity and magnetic field intensity data were collected. This work was funded by NSF-OPP 9319379 with the project title: Collaborative Research: Contrasting Architecture and Dynamics of the Transantarctic Mountains (Pensacola-Pole Transect). Principal Investigators were D.D. Blankenship, University of Texas Institute for Geophysics, and R.E. Bell and W.R. Buck, Lamont-Doherty Earth Observatory.", "east": 171.0, "geometry": ["POINT(160.5 -82.7)"], "keywords": "Airborne Radar; Antarctica; Bed Elevation; Geophysics; Glaciers/ice Sheet; Glaciers/Ice Sheet; Ice Surface Elevation; Ice Thickness; Robb Glacier; Transantarctic Mountains", "locations": "Antarctica; Robb Glacier; Transantarctic Mountains", "north": -81.9, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Blankenship, Donald D.; Bell, Robin; Buck, W. Roger; Young, Duncan A.", "project_titles": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR)", "projects": [{"proj_uid": "p0000125", "repository": "USAP-DC", "title": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -83.5, "title": "RBG - Robb Glacier Survey", "uid": "601604", "west": 150.0}, {"awards": "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": "1643353 Christianson, Knut; 1744649 Christianson, Knut", "bounds_geometry": ["POLYGON((-179.9989061 -89.752739299,-143.999017884 -89.752739299,-107.999129669 -89.752739299,-71.9992414529 -89.752739299,-35.9993532372 -89.752739299,0.000534978500013 -89.752739299,36.0004231942 -89.752739299,72.0003114099 -89.752739299,108.000199626 -89.752739299,144.000087841 -89.752739299,179.999976057 -89.752739299,179.999976057 -89.7772743702,179.999976057 -89.8018094414,179.999976057 -89.8263445126,179.999976057 -89.8508795838,179.999976057 -89.875414655,179.999976057 -89.8999497262,179.999976057 -89.9244847974,179.999976057 -89.9490198686,179.999976057 -89.9735549398,179.999976057 -89.998090011,144.000087841 -89.998090011,108.000199626 -89.998090011,72.0003114099 -89.998090011,36.0004231942 -89.998090011,0.000534978499985 -89.998090011,-35.9993532372 -89.998090011,-71.9992414529 -89.998090011,-107.999129669 -89.998090011,-143.999017884 -89.998090011,-179.9989061 -89.998090011,-179.9989061 -89.9735549398,-179.9989061 -89.9490198686,-179.9989061 -89.9244847974,-179.9989061 -89.8999497262,-179.9989061 -89.875414655,-179.9989061 -89.8508795838,-179.9989061 -89.8263445126,-179.9989061 -89.8018094414,-179.9989061 -89.7772743702,-179.9989061 -89.752739299))"], "date_created": "Thu, 06 Jan 2022 00:00:00 GMT", "description": "These are ground-based radar data collected from a subglacial lake ~15 km from the geographic South Pole. Data were collected with the Autonomous phase-sensitive Radio Echo Sounder (ApRES) (Nicholls et al., 2015). The intention of this dataset is to be used for vertical velocity structure and interpretation.", "east": 179.999976057, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Apres; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; South Pole; Subglacial Lakes; Vertical Velocity", "locations": "South Pole; South Pole; Antarctica", "north": -89.752739299, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Hills, Benjamin", "project_titles": "Collaborative Research: Computational Methods Supporting Joint Seismic and Radar Inversion for Ice Fabric and Temperature in Streaming Flow", "projects": [{"proj_uid": "p0010160", "repository": "USAP-DC", "title": "Collaborative Research: Computational Methods Supporting Joint Seismic and Radar Inversion for Ice Fabric and Temperature in Streaming Flow"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -89.998090011, "title": "South Pole Lake ApRES Radar", "uid": "601503", "west": -179.9989061}, {"awards": "1744649 Christianson, Knut; 1643353 Christianson, Knut", "bounds_geometry": ["POLYGON((-179.9989061 -89.752739299,-143.999017884 -89.752739299,-107.999129669 -89.752739299,-71.9992414529 -89.752739299,-35.9993532372 -89.752739299,0.000534978500013 -89.752739299,36.0004231942 -89.752739299,72.0003114099 -89.752739299,108.000199626 -89.752739299,144.000087841 -89.752739299,179.999976057 -89.752739299,179.999976057 -89.7772743702,179.999976057 -89.8018094414,179.999976057 -89.8263445126,179.999976057 -89.8508795838,179.999976057 -89.875414655,179.999976057 -89.8999497262,179.999976057 -89.9244847974,179.999976057 -89.9490198686,179.999976057 -89.9735549398,179.999976057 -89.998090011,144.000087841 -89.998090011,108.000199626 -89.998090011,72.0003114099 -89.998090011,36.0004231942 -89.998090011,0.000534978499985 -89.998090011,-35.9993532372 -89.998090011,-71.9992414529 -89.998090011,-107.999129669 -89.998090011,-143.999017884 -89.998090011,-179.9989061 -89.998090011,-179.9989061 -89.9735549398,-179.9989061 -89.9490198686,-179.9989061 -89.9244847974,-179.9989061 -89.8999497262,-179.9989061 -89.875414655,-179.9989061 -89.8508795838,-179.9989061 -89.8263445126,-179.9989061 -89.8018094414,-179.9989061 -89.7772743702,-179.9989061 -89.752739299))"], "date_created": "Thu, 06 Jan 2022 00:00:00 GMT", "description": "These are ground-based GNSS data collected from a subglacial lake ~15 km from the geographic South Pole.\r\nData were collected with two separate antenna/receiver systems: 1) Septentrio Altus APS3G antenna/receiver 2) Trimble NetR8 and Trimble Zephyr Geodetic antenna.", "east": 179.999976057, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GNSS; GPS; GPS Data; South Pole; Subglacial Lakes", "locations": "South Pole; Antarctica; South Pole", "north": -89.752739299, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Hills, Benjamin", "project_titles": "Collaborative Research: Computational Methods Supporting Joint Seismic and Radar Inversion for Ice Fabric and Temperature in Streaming Flow", "projects": [{"proj_uid": "p0010160", "repository": "USAP-DC", "title": "Collaborative Research: Computational Methods Supporting Joint Seismic and Radar Inversion for Ice Fabric and Temperature in Streaming Flow"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -89.998090011, "title": "South Pole Lake GNSS", "uid": "601502", "west": -179.9989061}, {"awards": "1744949 Campbell, Seth", "bounds_geometry": ["POLYGON((-127.5 -77,-127.4 -77,-127.3 -77,-127.2 -77,-127.1 -77,-127 -77,-126.9 -77,-126.8 -77,-126.7 -77,-126.6 -77,-126.5 -77,-126.5 -77.04,-126.5 -77.08,-126.5 -77.12,-126.5 -77.16,-126.5 -77.2,-126.5 -77.24,-126.5 -77.28,-126.5 -77.32,-126.5 -77.36,-126.5 -77.4,-126.6 -77.4,-126.7 -77.4,-126.8 -77.4,-126.9 -77.4,-127 -77.4,-127.1 -77.4,-127.2 -77.4,-127.3 -77.4,-127.4 -77.4,-127.5 -77.4,-127.5 -77.36,-127.5 -77.32,-127.5 -77.28,-127.5 -77.24,-127.5 -77.2,-127.5 -77.16,-127.5 -77.12,-127.5 -77.08,-127.5 -77.04,-127.5 -77))"], "date_created": "Wed, 08 Dec 2021 00:00:00 GMT", "description": "Here we deposited data sets from the 2018-2019 Mt. Waesche field season. Included are 5 MHz, 10 MHz, 100 MHz, and 350 MHz. Datasets are provided in SEG-Y format for the 100 and 350 MHz and H5 files for the 5 and 10 MHz.", "east": -126.5, "geometry": ["POINT(-127 -77.2)"], "keywords": "Antarctica; GPR; Mt. Waesche", "locations": "Mt. Waesche; Antarctica", "north": -77.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Braddock, Scott", "project_titles": "Collaborative Research: Constraining West Antarctic Ice Sheet elevation during the last interglacial", "projects": [{"proj_uid": "p0010272", "repository": "USAP-DC", "title": "Collaborative Research: Constraining West Antarctic Ice Sheet elevation during the last interglacial"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.4, "title": "Mt. Waesche ground-penetrating radar data 2018-2019", "uid": "601490", "west": -127.5}, {"awards": "1921418 Yan, Stephen", "bounds_geometry": ["POLYGON((35 76,35.1 76,35.2 76,35.3 76,35.4 76,35.5 76,35.6 76,35.7 76,35.8 76,35.9 76,36 76,36 75.9,36 75.8,36 75.7,36 75.6,36 75.5,36 75.4,36 75.3,36 75.2,36 75.1,36 75,35.9 75,35.8 75,35.7 75,35.6 75,35.5 75,35.4 75,35.3 75,35.2 75,35.1 75,35 75,35 75.1,35 75.2,35 75.3,35 75.4,35 75.5,35 75.6,35 75.7,35 75.8,35 75.9,35 76))"], "date_created": "Wed, 08 Dec 2021 00:00:00 GMT", "description": "This dataset includes a preliminary 1-km line of L-band radar data near the East Greenland Ice core Project. The data have been pulse compressed and focused using a simple Doppler focusing algorithm.", "east": 36.0, "geometry": ["POINT(35.5 75.5)"], "keywords": "Antarctica; Greenland", "locations": "Greenland; Antarctica", "north": 76.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Taylor, Drew; Gogineni, Prasad; O\u0027Neill, Charles; Taylor, Ryan", "project_titles": "EAGER: L-Band Radar Ice Sounder for Measuring Ice Basal Conditions and Ice-Shelf Melt Rate", "projects": [{"proj_uid": "p0010271", "repository": "USAP-DC", "title": "EAGER: L-Band Radar Ice Sounder for Measuring Ice Basal Conditions and Ice-Shelf Melt Rate"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": 75.0, "title": "2019 initial L-band radar data for EGRIP", "uid": "601488", "west": 35.0}, {"awards": "1921418 Yan, Stephen", "bounds_geometry": ["POLYGON((123 -75,123.1 -75,123.2 -75,123.3 -75,123.4 -75,123.5 -75,123.6 -75,123.7 -75,123.8 -75,123.9 -75,124 -75,124 -75.1,124 -75.2,124 -75.3,124 -75.4,124 -75.5,124 -75.6,124 -75.7,124 -75.8,124 -75.9,124 -76,123.9 -76,123.8 -76,123.7 -76,123.6 -76,123.5 -76,123.4 -76,123.3 -76,123.2 -76,123.1 -76,123 -76,123 -75.9,123 -75.8,123 -75.7,123 -75.6,123 -75.5,123 -75.4,123 -75.3,123 -75.2,123 -75.1,123 -75))"], "date_created": "Sat, 04 Dec 2021 00:00:00 GMT", "description": "This dataset includes a preliminary set of L-band radar data obtained near Dome Concordia runway. The data consist of stationary profiles that have been pulse compressed and focused using coherent integration.", "east": 124.0, "geometry": ["POINT(123.5 -75.5)"], "keywords": "Antarctica", "locations": "Antarctica; Antarctica", "north": -75.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Taylor, Drew; Gogineni, Prasad; O\u0027Neill, Charles; Taylor, Ryan", "project_titles": "EAGER: L-Band Radar Ice Sounder for Measuring Ice Basal Conditions and Ice-Shelf Melt Rate", "projects": [{"proj_uid": "p0010271", "repository": "USAP-DC", "title": "EAGER: L-Band Radar Ice Sounder for Measuring Ice Basal Conditions and Ice-Shelf Melt Rate"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -76.0, "title": "2019 initial L-band radar data for Dome Concordia", "uid": "601489", "west": 123.0}, {"awards": "1246353 Anderson, John; 1745055 Stearns, Leigh; 1745043 Simkins, Lauren", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Wed, 10 Nov 2021 00:00:00 GMT", "description": "The dataset here allows exploration of the causes and significance of Antarctic grounding-line sinuosity by coupling observations of contemporary Antarctic grounding lines and paleo-grounding lines expressed as ice-marginal landforms on the Ross Sea continental shelf. Modern grounding lines are derived from the MEaSUREs Version 2 Differential Satellite Radar Interferometry dataset with spatial resolutions of 25-120 m spanning February 1992 to December 2014 (Rignot et al., 2016; Mouginot et al., 2017). The boundaries of individual grounding lines representative of individual glacial catchments (n=664) were delineated by the inflection points of the shear strain rate, \u03b5xy (c.f Van der Veen et al., 2011). Sinuosity was calculated as the ratio of the true length, orthogonal to ice-flow direction, of the grounding lines and the straight line length between end-points and in units of km/km. Raster data were extracted at 1-km points along each grounding line; the mean was calculated for each grounding line and merged in a table with sinuosity data. A dataset of 6,275 paleo-grounding lines expressed as ice-marginal landforms on the deglaciated western Ross Sea continental shelf are used in this study, originally published by Simkins et al., 2018. The ice-marginal landforms were mapped from multibeam echo sounder data that was collected onboard the RVIB Nathaniel B. Palmer (NBP) 15-02 cruise using a Kongsberg EM122 operating in dual swath mode at 12 kHz frequency with 30-60% swath overlap (Cruise DOI: 10.7284/901477). The resulting bathymetry data was gridded at 20-40 m with decimeter vertical elevation resolution depending on water depth and sea-state. Sinuosity is calculated as a ratio of true (mapped) landform length, measured in the across paleo-ice flow direction at the crest of the landform, to the straight line distance between the mapped landform endpoints and in units of km/km. \r\n\r\nTo compare modern and paleo-grounding lines, we use a consistent length scale by segmenting the grounding lines into 2-km sections for the two datasets (modern, n=12,966; paleo, n=5,832), even though this eliminates grounding lines that are less than 2-km long and thus results in 1 modern and 3,873 paleo-grounding lines removed. The full-length and 2-km segmented groundings lines are provided as shapefiles \"InSAR_groundinglines_full\" and \"InSAR_groundinglines_2km\", the paleo-grounding lines are provided as shapefiles \"RossSea_icemarginal_full\" and \"RossSea_icemarginal_2km\", and points marking modern grounding lines retreat from repeat InSAR surveys are provided as shapefile \"InSAR_retreat_points\", all stored together in a geodatabase named \"Antarctic_groundinglines.gbd\". Additional grounding line metrics, including length, sinuosity, bed roughness, and bed slope for modern and paleo-grounding lines, and height-above-buoyancy gradient, ice-flow velocity, presence of pinning points and ice shelves are provided for modern grounding lines. \r\n\r\nThe published dataset was compiled and analyzed in the article \"Controls on circum-Antarctic grounding-line sinuosity \" by Simkins, L.M., Stearns, L.A., and Riverman, K.L, which will be submitted to a peer-review journal in November 2021.\r\n\r\nReferences\r\nMouginot, J., B. Scheuchl, and E. Rignot. 2017. MEaSUREs Antarctic Boundaries for IPY 2007-2009 from Satellite Radar, Version 2. [Indicate subset used]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. \r\n\r\nRignot, E., J. Mouginot, and B. Scheuchl. 2016. MEaSUREs Antarctic Grounding Line from Differential Satellite Radar Interferometry, Version 2. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. \r\n\r\nSimkins, L. M., Greenwood, S. L., \u0026 Anderson, J. B. (2018). Diagnosing ice sheet grounding line stability from landform morphology. The Cryosphere, 12(8), 2707-2726.\r\n\r\nVan der Veen, C. J., J. C. Plummer, \u0026 L. A. Stearns. (2011). Controls on the recent speed up of Jakobshavn Isbr\u00e6, West Greenland. Journal of Glaciology, 57(204), 770-782", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Bed Roughness; Bed Slope; Elevation; Glaciers/ice Sheet; Glaciers/Ice Sheet; Pinning Points", "locations": "Antarctica; Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Earth Sciences; Antarctic Earth Sciences", "persons": "Simkins, Lauren; Stearns, Leigh; Riverman, Kiya", "project_titles": "Collaborative Research: Topographic controls on Antarctic Ice Sheet grounding line retreat - integrating models and observations; Evidence for Paleo Ice Stream Collapse in the Western Ross Sea since the Last Glacial Maximum.", "projects": [{"proj_uid": "p0000395", "repository": "USAP-DC", "title": "Evidence for Paleo Ice Stream Collapse in the Western Ross Sea since the Last Glacial Maximum."}, {"proj_uid": "p0010269", "repository": "USAP-DC", "title": "Collaborative Research: Topographic controls on Antarctic Ice Sheet grounding line retreat - integrating models and observations"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Circum-Antarctic grounding-line sinuosity", "uid": "601484", "west": -180.0}, {"awards": "1543441 Fricker, Helen; 1656518 Gumport, Patricia", "bounds_geometry": null, "date_created": "Tue, 14 Sep 2021 00:00:00 GMT", "description": "This dataset includes raw, uncalibrated voltage vs time measurements from a bistatic radar receiver. We also include some processed data including upsampled matched filtered data, GPS receiver position, antenna separation", "east": null, "geometry": null, "keywords": "Antarctica; Bistatic Radar; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPS Data; Greenland; Lake Whillans; Radar; Store Glacier; Whillans Ice Stream; WISSARD", "locations": "Greenland; Lake Whillans; Antarctica; Whillans Ice Stream; Store Glacier", "north": null, "nsf_funding_programs": "Antarctic Integrated System Science; Antarctic Integrated System Science", "persons": "Bienert, Nicole; Schroeder, Dustin; Siegfried, Matthew; Peters, Sean; MacKie, Emma; Dawson, Eliza; Christoffersen, Poul", "project_titles": "Collaborative Research: Subglacial Antarctic Lakes Scientific Access (SALSA): Integrated Study of Carbon Cycling in Hydrologically-active Subglacial Environments", "projects": [{"proj_uid": "p0010119", "repository": "USAP-DC", "title": "Collaborative Research: Subglacial Antarctic Lakes Scientific Access (SALSA): Integrated Study of Carbon Cycling in Hydrologically-active Subglacial Environments"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WISSARD", "south": null, "title": "Bistatic Radar Sounding of Whillans Ice Stream, Antarctica and Store Glacier, Greenland", "uid": "601472", "west": null}, {"awards": "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": "Antarctica; Epica Dome C; 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,-176.5 -86,-173 -86,-169.5 -86,-166 -86,-162.5 -86,-159 -86,-155.5 -86,-152 -86,-148.5 -86,-145 -86,-145 -86.4,-145 -86.8,-145 -87.2,-145 -87.6,-145 -88,-145 -88.4,-145 -88.8,-145 -89.2,-145 -89.6,-145 -90,-148.5 -90,-152 -90,-155.5 -90,-159 -90,-162.5 -90,-166 -90,-169.5 -90,-173 -90,-176.5 -90,180 -90,174.2 -90,168.4 -90,162.6 -90,156.8 -90,151 -90,145.2 -90,139.4 -90,133.6 -90,127.8 -90,122 -90,122 -89.6,122 -89.2,122 -88.8,122 -88.4,122 -88,122 -87.6,122 -87.2,122 -86.8,122 -86.4,122 -86,127.8 -86,133.6 -86,139.4 -86,145.2 -86,151 -86,156.8 -86,162.6 -86,168.4 -86,174.2 -86,-180 -86))"], "date_created": "Fri, 02 Apr 2021 00:00:00 GMT", "description": "Level 2 aerogeophysical data, derived from the HiCARS2 radar system and laser altimeter for the Titan Dome region of East Antarctica. The observations included are geo-referenced surface elevation, bed elevation, ice thickness, bed reflectivity, surface reflectivity, and dated internal reflecting horizon depths.", "east": -145.0, "geometry": ["POINT(168.5 -88)"], "keywords": "Airborne Laser Altimetry; Airborne Radar; Airplane; Antarctica; Bedrock Elevation; East Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Thickness; Radar Echo Sounder; Surface Elevation; Titan Dome", "locations": "Antarctica; East Antarctica; Titan Dome", "north": -86.0, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Beem, Lucas H.; Young, Duncan A.; Greenbaum, Jamin; Ng, Gregory; Blankenship, Donald D.; Cavitte, Marie G. P; Jingxue, Guo; Bo, Sun; Young, Duncan", "project_titles": "Collaborative Research: Southern Plateau Ice-sheet Characterization and Evolution of the Central Antarctic Plate (SPICECAP)", "projects": [{"proj_uid": "p0010115", "repository": "USAP-DC", "title": "Collaborative Research: Southern Plateau Ice-sheet Characterization and Evolution of the Central Antarctic Plate (SPICECAP)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Titan Dome, East Antarctica, Aerogeophysical Survey", "uid": "601437", "west": 122.0}, {"awards": "1745137 Schroeder, Dustin", "bounds_geometry": ["POLYGON((-130 -72.9,-125.27 -72.9,-120.54 -72.9,-115.81 -72.9,-111.08 -72.9,-106.35 -72.9,-101.62 -72.9,-96.89 -72.9,-92.16 -72.9,-87.43 -72.9,-82.7 -72.9,-82.7 -73.76,-82.7 -74.62,-82.7 -75.48,-82.7 -76.34,-82.7 -77.2,-82.7 -78.06,-82.7 -78.92,-82.7 -79.78,-82.7 -80.64,-82.7 -81.5,-87.43 -81.5,-92.16 -81.5,-96.89 -81.5,-101.62 -81.5,-106.35 -81.5,-111.08 -81.5,-115.81 -81.5,-120.54 -81.5,-125.27 -81.5,-130 -81.5,-130 -80.64,-130 -79.78,-130 -78.92,-130 -78.06,-130 -77.2,-130 -76.34,-130 -75.48,-130 -74.62,-130 -73.76,-130 -72.9))"], "date_created": "Fri, 05 Mar 2021 00:00:00 GMT", "description": "The dataset contains radargrams from the 2004-2005 airborne radar sounding surveys on Pine Island Glacier and Thwaites Glacier as part of the BBAS and AGASEA projects. It also includes basal reflectivity and one-way attenuation rates derived from these radargrams. Radar data from the Pine Island Ice Shelf inland to the Bentley Sublglacial Trench were collected by the British Antarctica Survey (BAS) with the Polarimetric-radar Airborne Science INstrument (PASIN) radar sounder, operating at a center frequency of 150 MHz and 15 MHz bandwidth. Data over Thwaites Glacier were collected by the University of Texas Institute for Geophysics (UTIG) High Capability Airborne Radar Sounder (HiCARS) operating at a center frequency of 60 MHz with 15 MHz of bandwidth. Data are provided as 50km segments in NetCDF files, along with kml location files, and pdf files for browsing radargrams images by flight transect. Details of the processing methods are included in the associated README file. The processed data sets (reflectivity and attenuation) are provided as a single NetCDF file for each flight transect. Details of the calibration and processing procedures are provided in Chu, et al (in review).", "east": -82.7, "geometry": ["POINT(-106.35 -77.2)"], "keywords": "Amundsen Sea; Antarctica; Bed Reflectivity; Ice Penetrating Radar; Radar Echo Sounder", "locations": "Amundsen Sea; Antarctica", "north": -72.9, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Chu, Winnie; Hilger, Andrew M.; Culberg, Riley; Schroeder, Dustin; Jordan, Thomas M.; Seroussi, Helene; Young, Duncan A.; Vaughan, David G.", "project_titles": "CAREER: Cross-Instrument Synthesis of Antarctic Radar Sounding Observations", "projects": [{"proj_uid": "p0010058", "repository": "USAP-DC", "title": "CAREER: Cross-Instrument Synthesis of Antarctic Radar Sounding Observations"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -81.5, "title": "Radar Sounding Observations of the Amundsen Sea Embayment, 2004-2005", "uid": "601436", "west": -130.0}, {"awards": "0941678 ; 0424589 Gogineni, S. Prasad; 0733025 Blankenship, Donald; 1443690 Young, Duncan", "bounds_geometry": ["POLYGON((114 -74,115.2 -74,116.4 -74,117.6 -74,118.8 -74,120 -74,121.2 -74,122.4 -74,123.6 -74,124.8 -74,126 -74,126 -74.3,126 -74.6,126 -74.9,126 -75.2,126 -75.5,126 -75.8,126 -76.1,126 -76.4,126 -76.7,126 -77,124.8 -77,123.6 -77,122.4 -77,121.2 -77,120 -77,118.8 -77,117.6 -77,116.4 -77,115.2 -77,114 -77,114 -76.7,114 -76.4,114 -76.1,114 -75.8,114 -75.5,114 -75.2,114 -74.9,114 -74.6,114 -74.3,114 -74))"], "date_created": "Fri, 18 Dec 2020 00:00:00 GMT", "description": "The data set published here consists of 26 ice-penetrating radar IRHs (internal reflecting horizons) which were traced across multiple ice-penetrating radar surveys that deployed several generations of modern ice-penetrating radar sounders over a decade, between 2008 and 2018, over the Dome C region of the East Antarctic Plateau. The data set is associated to publication: Cavitte, M. G. P, Young, D. A, Mulvaney, R., Ritz, C., Greenbaum, J. S., Ng, G., Kempf, S. D., Quartini, E., Muldoon, G. R., Paden, J., Frezzotti, M., Roberts, J. L. , Tozer, C. R. , Schroeder, D. M. and Blankenship, D. D. A detailed radiostratigraphic data set for the central East Antarctic Plateau spanning from the Holocene to the mid-Pleistocene, Earth Syst. Sci. Data, 13, 4759\u20134777, 2021, https://doi.org/10.5194/essd-13-4759-2021.\r\n\r\nWe can subdivide the radar sounders used into three sets. The primary set was collected by the University of Texas at Austin Institute for Geophysics (UTIG) and the Australian Antarctic Division (AAD) as part of the ICECAP project) between 2008 and 2015. This includes the Oldest Ice candidate A (OIA) survey flown by ICECAP in January 2016. Data were collected with the High Capacity Airborne Radar Sounder (HiCARS) 1 \u0026 2 and its Multifrequency Airborne Radar-sounder for Full-phase Assessment (MARFA) descendant. The data was collected from a DC-3T Basler which operated from Concordia Station. \r\n\r\nThe second set consists of the Vostok-Dome C airborne radar transect was flown by the Center for Remote Sensing of Ice Sheets (CReSIS) at the University of Kansas using the Multi-Channel Coherent Radar Depth Sounder (MCoRDS) in a single flight line in 2013. A P-3 Orion operating from McMurdo Station collected these data as part of NASA Operation Ice Bridge. \r\n\r\nThe third set consists of a subset of the LDC ground-based radar survey, towed behind a PistenBully PB300 tractor, collected by the Beyond EPICA - Oldest Ice (BE-OI) European Consortium using the British Antarctic Survey\u2019s (BAS) Deep Looking Radio Echo Sounder (DELORES) radar system. Each IRH has been traced in all three radar sets and is published here as a single csv and netcdf file. Formats are self-documented in these csv/netcdf files. \r\n\r\nWhere HiCARS and MCoRDS radar transects are used, the IRH is provided at a 1 km spatial resolution, where DELORES radar transects are used, the IRH is provided at a 250 m spatial resolution. \r\n\r\nThe 26 IRHs published here were traced semi-automatically by first author Marie Cavitte, using Landmark\u0027s Decision Space Desktop software and its built-in picker. \r\n\r\nThe IRHs are dated at the EDC ice core using the AICC2012 timescale (Veres et al., 2013; Bazin et al., 2013). \r\n\r\nIce core ages are transferred onto the IRHs on radar transect MCM/JKB1a/EDMC01a at distance_m (column in the data sets) = 110.153 m along the transect. That radar point of closest approach is 94\u2009m away from the ice core site. Depth and age uncertainties associated to each IRH are quantified n the associated publication: Cavitte, M. G. P, Young, D. A, Mulvaney, R., Ritz, C., Greenbaum, J. S., Ng, G., Kempf, S. D., Quartini, E., Muldoon, G. R., Paden, J., Frezzotti, M., Roberts, J. L. , Tozer, C. R. , Schroeder, D. M. and Blankenship, D. D. A detailed radiostratigraphic data set for the central East Antarctic Plateau spanning from the Holocene to the mid-Pleistocene, Earth Syst. Sci. Data, 13, 4759\u20134777, 2021, https://doi.org/10.5194/essd-13-4759-2021. \r\n\n\r\n\r\nBesides NSF this dataset is the result of additional support from NERC grant - NE/D003733/1, NASA grants - NX08AN68G, NNX09AR52G, NNX11AD33G, NNX13AD53A, and funding from the G. Unger Vetlesen Foundation.\n\n\\nNote that the dataset was archived before the accompanying paper was officially published. The abstract and dataset description has been updated to cite the correct reference to the ESSD paper (Cavitte et al., 2021) after the paper was published. The headers of the actual data files contain only a placeholder to this reference.", "east": 126.0, "geometry": ["POINT(120 -75.5)"], "keywords": "Antarctica; East Antarctic Plateau; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; ICECAP; Ice Penetrating Radar; Internal Reflecting Horizons", "locations": "Antarctica; East Antarctic Plateau", "north": -74.0, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Earth Sciences; Antarctic Earth Sciences", "persons": "Cavitte, Marie G. P; Young, Duncan A.; Mulvaney, Robert; Ritz, Catherine; Greenbaum, Jamin; Ng, Gregory; Kempf, Scott D.; Quartini, Enrica; Muldoon, Gail R.; Paden, John; Frezzotti, Massimo; Roberts, Jason; Tozer, Carly; Schroeder, Dustin; Blankenship, Donald D.", "project_titles": "Center for Remote Sensing of Ice Sheets (CReSIS); Collaborative Research: Southern Plateau Ice-sheet Characterization and Evolution of the Central Antarctic Plate (SPICECAP); IPY Research: Investigating the Cryospheric Evolution of the Central Antarctic Plate (ICECAP)", "projects": [{"proj_uid": "p0000719", "repository": "USAP-DC", "title": "IPY Research: Investigating the Cryospheric Evolution of the Central Antarctic Plate (ICECAP)"}, {"proj_uid": "p0000102", "repository": "USAP-DC", "title": "Center for Remote Sensing of Ice Sheets (CReSIS)"}, {"proj_uid": "p0010115", "repository": "USAP-DC", "title": "Collaborative Research: Southern Plateau Ice-sheet Characterization and Evolution of the Central Antarctic Plate (SPICECAP)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Dome C Ice Core", "south": -77.0, "title": "Ice-penetrating radar internal stratigraphy over Dome C and the wider East Antarctic Plateau", "uid": "601411", "west": 114.0}, {"awards": "1745116 Scambos, Ted", "bounds_geometry": ["POLYGON((-72 -70.75,-71.95 -70.75,-71.9 -70.75,-71.85 -70.75,-71.8 -70.75,-71.75 -70.75,-71.7 -70.75,-71.65 -70.75,-71.6 -70.75,-71.55 -70.75,-71.5 -70.75,-71.5 -70.775,-71.5 -70.8,-71.5 -70.825,-71.5 -70.85,-71.5 -70.875,-71.5 -70.9,-71.5 -70.925,-71.5 -70.95,-71.5 -70.975,-71.5 -71,-71.55 -71,-71.6 -71,-71.65 -71,-71.7 -71,-71.75 -71,-71.8 -71,-71.85 -71,-71.9 -71,-71.95 -71,-72 -71,-72 -70.975,-72 -70.95,-72 -70.925,-72 -70.9,-72 -70.875,-72 -70.85,-72 -70.825,-72 -70.8,-72 -70.775,-72 -70.75))"], "date_created": "Wed, 21 Oct 2020 00:00:00 GMT", "description": "This dataset compiles a suite of glaciology (density, stratigraphy), hydrology (slug and dilution tests) and geophysical measurements (GPS, GPR, ApRES) to characterize a firn aquifer observed within the Wilkins Ice Shelf, Antarctica.", "east": -71.5, "geometry": ["POINT(-71.75 -70.875)"], "keywords": "Airborne Radar; Antarctica; Antarctic Peninsula; Firn; Firn Aquifer; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Hydrology; Snow/ice; Snow/Ice; Wilkins Ice Shelf", "locations": "Wilkins Ice Shelf; Antarctica; Antarctic Peninsula; Wilkins Ice Shelf", "north": -70.75, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Mi\u00e8ge, Cl\u00e9ment; Montgomery, Lynn; Miller, Julie; Scambos, Ted; Wallin, Bruce; Miller, Olivia; Solomon, Kip; Forster, Richard; Koenig, Lora", "project_titles": "Antarctic Firn Aquifers: Extent, Characteristics, and Comparison with Greenland Occurrences", "projects": [{"proj_uid": "p0010126", "repository": "USAP-DC", "title": "Antarctic Firn Aquifers: Extent, Characteristics, and Comparison with Greenland Occurrences"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -71.0, "title": "Density, hydrology and geophysical measurements from the Wilkins Ice Shelf firn aquifer", "uid": "601390", "west": -72.0}, {"awards": "1543452 Blankenship, Donald; 0733025 Blankenship, Donald; 1443690 Young, Duncan; 0636724 Blankenship, Donald", "bounds_geometry": ["POLYGON((80 -65,89 -65,98 -65,107 -65,116 -65,125 -65,134 -65,143 -65,152 -65,161 -65,170 -65,170 -66.5,170 -68,170 -69.5,170 -71,170 -72.5,170 -74,170 -75.5,170 -77,170 -78.5,170 -80,161 -80,152 -80,143 -80,134 -80,125 -80,116 -80,107 -80,98 -80,89 -80,80 -80,80 -78.5,80 -77,80 -75.5,80 -74,80 -72.5,80 -71,80 -69.5,80 -68,80 -66.5,80 -65))"], "date_created": "Mon, 24 Aug 2020 00:00:00 GMT", "description": "The International Collaborative Exploration of the Cryosphere though Airborne Profiling (ICECAP) collected five seasons of aerogeophysical data data through the NSFs International Polar Year and NASAs Operation Ice Bridge programs in East Antarctica, using the coherent HiCARS 60 MHz radar system. By comparing echo strengths for different focusing apertures, and accounting for the ranges and angles involved, we can derive the \"specularity content\" of the bed echo, a proxy for small scale bed roughness and a good indicator for subglacial water pressure in regions of distributed subglacial water (Schroeder et al., 2014, IEEE GRSL, 10.1109/LGRS.2014.2337878; IEEE; Dow et al., 2019, EPSL https://doi.org/10.1016/j.epsl.2019.115961). Specularity data are inherently noisy, so these products have been smoothed with a 1 km filter.", "east": 170.0, "geometry": ["POINT(125 -72.5)"], "keywords": "Antarctica; East Antarctica; ICECAP; Ice Penetrating Radar; Radar Echo Sounder; Radar Echo Sounding; Subglacial Hydrology", "locations": "East Antarctica; Antarctica", "north": -65.0, "nsf_funding_programs": "Antarctic Integrated System Science; Antarctic Glaciology; Antarctic Earth Sciences; Antarctic Earth Sciences", "persons": "Young, Duncan A.; Blankenship, Donald D.; Roberts, Jason; Siegert, Martin; van Ommen, Tas; Greenbaum, Jamin; Schroeder, Dustin", "project_titles": "Collaborative Research: Southern Plateau Ice-sheet Characterization and Evolution of the Central Antarctic Plate (SPICECAP); Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System; East Antarctic Grounding Line Experiment (EAGLE); IPY Research: Investigating the Cryospheric Evolution of the Central Antarctic Plate (ICECAP)", "projects": [{"proj_uid": "p0010115", "repository": "USAP-DC", "title": "Collaborative Research: Southern Plateau Ice-sheet Characterization and Evolution of the Central Antarctic Plate (SPICECAP)"}, {"proj_uid": "p0000254", "repository": "USAP-DC", "title": "East Antarctic Grounding Line Experiment (EAGLE)"}, {"proj_uid": "p0000174", "repository": "USAP-DC", "title": "Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System"}, {"proj_uid": "p0000719", "repository": "USAP-DC", "title": "IPY Research: Investigating the Cryospheric Evolution of the Central Antarctic Plate (ICECAP)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.0, "title": "ICECAP Basal Interface Specularity Content Profiles: IPY and OIB", "uid": "601371", "west": 80.0}, {"awards": "1443471 Koutnik, Michelle", "bounds_geometry": ["POLYGON((-180 -89,-166.5 -89,-153 -89,-139.5 -89,-126 -89,-112.5 -89,-99 -89,-85.5 -89,-72 -89,-58.5 -89,-45 -89,-45 -89.1,-45 -89.2,-45 -89.3,-45 -89.4,-45 -89.5,-45 -89.6,-45 -89.7,-45 -89.8,-45 -89.9,-45 -90,-58.5 -90,-72 -90,-85.5 -90,-99 -90,-112.5 -90,-126 -90,-139.5 -90,-153 -90,-166.5 -90,180 -90,173 -90,166 -90,159 -90,152 -90,145 -90,138 -90,131 -90,124 -90,117 -90,110 -90,110 -89.9,110 -89.8,110 -89.7,110 -89.6,110 -89.5,110 -89.4,110 -89.3,110 -89.2,110 -89.1,110 -89,117 -89,124 -89,131 -89,138 -89,145 -89,152 -89,159 -89,166 -89,173 -89,-180 -89))"], "date_created": "Thu, 20 Aug 2020 00:00:00 GMT", "description": "This data set contains ice-penetrating radar measurements of surface topography, ice thickness, internal stratigraphy, and derived bed topography in the vicinity of South Pole.", "east": -45.0, "geometry": ["POINT(-147.5 -89.5)"], "keywords": "Antarctica; Ice Sheet", "locations": "Antarctica; Antarctica", "north": -89.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Waddington, Edwin D.; Conway, Howard; Koutnik, Michelle; Fudge, T. J.; Lilien, David; Stevens, Max", "project_titles": "Collaborative Research: Characterization of Upstream Ice and Firn Dynamics affecting the South Pole Ice Core", "projects": [{"proj_uid": "p0000200", "repository": "USAP-DC", "title": "Collaborative Research: Characterization of Upstream Ice and Firn Dynamics affecting the South Pole Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -90.0, "title": "7MHz radar in the vicinity of South Pole", "uid": "601369", "west": 110.0}, {"awards": "1142167 Pettit, Erin", "bounds_geometry": ["POLYGON((-112.3 -79.2,-112.22 -79.2,-112.14 -79.2,-112.06 -79.2,-111.98 -79.2,-111.9 -79.2,-111.82 -79.2,-111.74 -79.2,-111.66 -79.2,-111.58 -79.2,-111.5 -79.2,-111.5 -79.23,-111.5 -79.26,-111.5 -79.29,-111.5 -79.32,-111.5 -79.35,-111.5 -79.38,-111.5 -79.41,-111.5 -79.44,-111.5 -79.47,-111.5 -79.5,-111.58 -79.5,-111.66 -79.5,-111.74 -79.5,-111.82 -79.5,-111.9 -79.5,-111.98 -79.5,-112.06 -79.5,-112.14 -79.5,-112.22 -79.5,-112.3 -79.5,-112.3 -79.47,-112.3 -79.44,-112.3 -79.41,-112.3 -79.38,-112.3 -79.35,-112.3 -79.32,-112.3 -79.29,-112.3 -79.26,-112.3 -79.23,-112.3 -79.2))"], "date_created": "Fri, 15 May 2020 00:00:00 GMT", "description": "We tested the ability of phase sensitive radar (ApRES) to detect vertical strain throughout the depth of an ice sheet 3400m thick. ", "east": -111.5, "geometry": ["POINT(-111.9 -79.35)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Penetrating Radar; Ice Strain; Phase Sensitive Radar; Radar; Snow/ice; Snow/Ice; WAIS Divide", "locations": "WAIS Divide; Antarctica", "north": -79.2, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Pettit, Erin", "project_titles": "Collaborative Research: VeLveT Ice - eVoLution of Fabric and Texture in Ice at WAIS Divide, West Antarctica", "projects": [{"proj_uid": "p0010098", "repository": "USAP-DC", "title": "Collaborative Research: VeLveT Ice - eVoLution of Fabric and Texture in Ice at WAIS Divide, West Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.5, "title": "ApRES Vertical Strain Study", "uid": "601323", "west": -112.3}, {"awards": "1142167 Pettit, Erin", "bounds_geometry": ["POLYGON((-112.3 -79.2,-112.22 -79.2,-112.14 -79.2,-112.06 -79.2,-111.98 -79.2,-111.9 -79.2,-111.82 -79.2,-111.74 -79.2,-111.66 -79.2,-111.58 -79.2,-111.5 -79.2,-111.5 -79.23,-111.5 -79.26,-111.5 -79.29,-111.5 -79.32,-111.5 -79.35,-111.5 -79.38,-111.5 -79.41,-111.5 -79.44,-111.5 -79.47,-111.5 -79.5,-111.58 -79.5,-111.66 -79.5,-111.74 -79.5,-111.82 -79.5,-111.9 -79.5,-111.98 -79.5,-112.06 -79.5,-112.14 -79.5,-112.22 -79.5,-112.3 -79.5,-112.3 -79.47,-112.3 -79.44,-112.3 -79.41,-112.3 -79.38,-112.3 -79.35,-112.3 -79.32,-112.3 -79.29,-112.3 -79.26,-112.3 -79.23,-112.3 -79.2))"], "date_created": "Fri, 15 May 2020 00:00:00 GMT", "description": "We tested the ability of phase sensitive radar (ApRES) to detect firn density profile towards developing a simpler, non destructive, faster method than firn coring. ", "east": -111.5, "geometry": ["POINT(-111.9 -79.35)"], "keywords": "Antarctica; Firn; Firn Density; Glaciology; Ice Penetrating Radar; Phase Sensitive Radar; Radar; Snow/ice; Snow/Ice; WAIS Divide", "locations": "WAIS Divide; Antarctica", "north": -79.2, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Pettit, Erin", "project_titles": "Collaborative Research: VeLveT Ice - eVoLution of Fabric and Texture in Ice at WAIS Divide, West Antarctica", "projects": [{"proj_uid": "p0010098", "repository": "USAP-DC", "title": "Collaborative Research: VeLveT Ice - eVoLution of Fabric and Texture in Ice at WAIS Divide, West Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.5, "title": "ApRES Firn Density Study", "uid": "601322", "west": -112.3}, {"awards": "9911617 Blankenship, Donald; 9978236 Bell, Robin", "bounds_geometry": ["POLYGON((101.5 -75.5,102.15 -75.5,102.8 -75.5,103.45 -75.5,104.1 -75.5,104.75 -75.5,105.4 -75.5,106.05 -75.5,106.7 -75.5,107.35 -75.5,108 -75.5,108 -75.85,108 -76.2,108 -76.55,108 -76.9,108 -77.25,108 -77.6,108 -77.95,108 -78.3,108 -78.65,108 -79,107.35 -79,106.7 -79,106.05 -79,105.4 -79,104.75 -79,104.1 -79,103.45 -79,102.8 -79,102.15 -79,101.5 -79,101.5 -78.65,101.5 -78.3,101.5 -77.95,101.5 -77.6,101.5 -77.25,101.5 -76.9,101.5 -76.55,101.5 -76.2,101.5 -75.85,101.5 -75.5))"], "date_created": "Tue, 28 Apr 2020 00:00:00 GMT", "description": "Processed IcePenetrating Radar Altimeter Shot Data (version 2) acquired during the SOAR Twin Otter expedition SOAR-LVS (2000)\r\nThis data set was acquired with a IcePenetrating Radar Altimeter during SOAR Twin Otter expedition SOAR-LVS conducted in 2000 (Chief Scientist: Dr. Robin Bell; Investigator(s): Dr. Robin Bell and Dr. Michael Studinger). These data files are of SEGY format and include Reflection Radar shot data and were processed after data collection. Data were acquired as part of the project(s): SOAR-Lake Vostok Survey (LVS) and Understanding the Boundary Conditions of the Lake Vostok Environment: A Site Survey for Future Work", "east": 108.0, "geometry": ["POINT(104.75 -77.25)"], "keywords": "Airborne Radar; Airplane; Antarctica; East Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Lake Vostok; Navigation; Radar; SOAR; Subglacial Lakes", "locations": "Lake Vostok; Antarctica; East Antarctica", "north": -75.5, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Earth Sciences", "persons": "Studinger, Michael S.; Bell, Robin", "project_titles": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR); Understanding the Boundary Conditions of the Lake Vostok Environment: A Site Survey for Future Work\r\n", "projects": [{"proj_uid": "p0000125", "repository": "USAP-DC", "title": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR)"}, {"proj_uid": "p0010097", "repository": "USAP-DC", "title": "Understanding the Boundary Conditions of the Lake Vostok Environment: A Site Survey for Future Work\r\n"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.0, "title": "SOAR-Lake Vostok Survey airborne radar data", "uid": "601300", "west": 101.5}, {"awards": "9978236 Bell, Robin; 9911617 Blankenship, Donald", "bounds_geometry": ["POLYGON((101.5 -75.5,102.15 -75.5,102.8 -75.5,103.45 -75.5,104.1 -75.5,104.75 -75.5,105.4 -75.5,106.05 -75.5,106.7 -75.5,107.35 -75.5,108 -75.5,108 -75.85,108 -76.2,108 -76.55,108 -76.9,108 -77.25,108 -77.6,108 -77.95,108 -78.3,108 -78.65,108 -79,107.35 -79,106.7 -79,106.05 -79,105.4 -79,104.75 -79,104.1 -79,103.45 -79,102.8 -79,102.15 -79,101.5 -79,101.5 -78.65,101.5 -78.3,101.5 -77.95,101.5 -77.6,101.5 -77.25,101.5 -76.9,101.5 -76.55,101.5 -76.2,101.5 -75.85,101.5 -75.5))"], "date_created": "Tue, 28 Apr 2020 00:00:00 GMT", "description": "Bedrock Elevation Data acquired during the SOAR Twin Otter expedition SOAR-LVS (2000)\r\nThis data set was during SOAR Twin Otter expedition SOAR-LVS conducted in 2000 (Chief Scientist: Dr. Robin Bell; Investigator(s): Dr. Michael Studinger). These data files are of ASCII format and include Bedrock Elevation data and were processed after data collection. Data were acquired as part of the project(s): SOAR-Lake Vostok Survey (LVS) and Understanding the Boundary Conditions of the Lake Vostok Environment: A Site Survey for Future Work", "east": 108.0, "geometry": ["POINT(104.75 -77.25)"], "keywords": "Airborne Laser Altimeters; Airborne Laser Altimetry; Airborne Radar; Airplane; Antarctica; Bed Elevation; Bedrock Elevation; Digital Elevation Model; East Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Sheet; Lake Vostok; Radar; Radar Echo Sounder; SOAR", "locations": "East Antarctica; Lake Vostok; Antarctica", "north": -75.5, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Earth Sciences", "persons": "Studinger, Michael S.; Bell, Robin", "project_titles": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR); Understanding the Boundary Conditions of the Lake Vostok Environment: A Site Survey for Future Work\r\n", "projects": [{"proj_uid": "p0010097", "repository": "USAP-DC", "title": "Understanding the Boundary Conditions of the Lake Vostok Environment: A Site Survey for Future Work\r\n"}, {"proj_uid": "p0000125", "repository": "USAP-DC", "title": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.0, "title": "SOAR-Lake Vostok Survey bed elevation data", "uid": "601299", "west": 101.5}, {"awards": "9978236 Bell, Robin; 9911617 Blankenship, Donald", "bounds_geometry": ["POLYGON((101.5 -75.5,102.15 -75.5,102.8 -75.5,103.45 -75.5,104.1 -75.5,104.75 -75.5,105.4 -75.5,106.05 -75.5,106.7 -75.5,107.35 -75.5,108 -75.5,108 -75.85,108 -76.2,108 -76.55,108 -76.9,108 -77.25,108 -77.6,108 -77.95,108 -78.3,108 -78.65,108 -79,107.35 -79,106.7 -79,106.05 -79,105.4 -79,104.75 -79,104.1 -79,103.45 -79,102.8 -79,102.15 -79,101.5 -79,101.5 -78.65,101.5 -78.3,101.5 -77.95,101.5 -77.6,101.5 -77.25,101.5 -76.9,101.5 -76.55,101.5 -76.2,101.5 -75.85,101.5 -75.5))"], "date_created": "Tue, 28 Apr 2020 00:00:00 GMT", "description": "Surface Elevation Data acquired during the SOAR Twin Otter expedition SOAR-LVS (2000)\r\nThis data set was during SOAR Twin Otter expedition SOAR-LVS conducted in 2000 (Chief Scientist: Dr. Robin Bell; Investigator(s): Dr. Michael Studinger). These data files are of ASCII format and include Surface Elevation data and were processed after data collection. Data were acquired as part of the project(s): SOAR-Lake Vostok Survey (LVS) and Understanding the Boundary Conditions of the Lake Vostok Environment: A Site Survey for Future Work", "east": 108.0, "geometry": ["POINT(104.75 -77.25)"], "keywords": "Airborne Altimetry; Airborne Laser Altimeters; Airborne Radar; Airplane; Antarctica; East Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Sheet; Ice Sheet Elevation; Ice Surface; Lake Vostok; Radar Echo Sounder; SOAR; Surface Elevation", "locations": "Lake Vostok; East Antarctica; Antarctica", "north": -75.5, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Earth Sciences", "persons": "Studinger, Michael S.; Bell, Robin", "project_titles": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR); Understanding the Boundary Conditions of the Lake Vostok Environment: A Site Survey for Future Work\r\n", "projects": [{"proj_uid": "p0010097", "repository": "USAP-DC", "title": "Understanding the Boundary Conditions of the Lake Vostok Environment: A Site Survey for Future Work\r\n"}, {"proj_uid": "p0000125", "repository": "USAP-DC", "title": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.0, "title": "SOAR-Lake Vostok Survey surface elevation data", "uid": "601298", "west": 101.5}, {"awards": "9911617 Blankenship, Donald; 9978236 Bell, Robin", "bounds_geometry": ["POLYGON((101.5 -75.5,102.15 -75.5,102.8 -75.5,103.45 -75.5,104.1 -75.5,104.75 -75.5,105.4 -75.5,106.05 -75.5,106.7 -75.5,107.35 -75.5,108 -75.5,108 -75.85,108 -76.2,108 -76.55,108 -76.9,108 -77.25,108 -77.6,108 -77.95,108 -78.3,108 -78.65,108 -79,107.35 -79,106.7 -79,106.05 -79,105.4 -79,104.75 -79,104.1 -79,103.45 -79,102.8 -79,102.15 -79,101.5 -79,101.5 -78.65,101.5 -78.3,101.5 -77.95,101.5 -77.6,101.5 -77.25,101.5 -76.9,101.5 -76.55,101.5 -76.2,101.5 -75.85,101.5 -75.5))"], "date_created": "Tue, 28 Apr 2020 00:00:00 GMT", "description": "Processed IcePenetrating Radar Altimeter Data acquired during the SOAR Twin Otter expedition SOAR-LVS (2000)\r\nThis data set was acquired with a IcePenetrating Radar Altimeter during SOAR Twin Otter expedition SOAR-LVS conducted in 2000 (Chief Scientist: Dr. Robin Bell; Investigator(s): Dr. Robin Bell and Dr. Michael Studinger). These data files are of ASCII format and include Ice LayerThickness data and were processed after data collection. Data were acquired as part of the project(s): SOAR-Lake Vostok Survey (LVS) and Understanding the Boundary Conditions of the Lake Vostok Environment: A Site Survey for Future Work", "east": 108.0, "geometry": ["POINT(104.75 -77.25)"], "keywords": "Airborne Laser Altimeters; Airborne Radar; Airplane; Antarctica; East Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice; Ice Sheet; Ice Stratigraphy; Ice Thickness; Ice Thickness Distribution; Lake Vostok; Radar; Radar Altimetry; Radar Echo Sounder; SOAR; Subglacial Lake", "locations": "East Antarctica; Antarctica; Lake Vostok", "north": -75.5, "nsf_funding_programs": "Antarctic Earth Sciences; Antarctic Earth Sciences", "persons": "Studinger, Michael S.; Bell, Robin", "project_titles": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR); Understanding the Boundary Conditions of the Lake Vostok Environment: A Site Survey for Future Work\r\n", "projects": [{"proj_uid": "p0000125", "repository": "USAP-DC", "title": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR)"}, {"proj_uid": "p0010097", "repository": "USAP-DC", "title": "Understanding the Boundary Conditions of the Lake Vostok Environment: A Site Survey for Future Work\r\n"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.0, "title": "SOAR-Lake Vostok Survey ice thickness data", "uid": "601297", "west": 101.5}, {"awards": "0632292 Bell, Robin", "bounds_geometry": ["POLYGON((65 -77.5,67.4 -77.5,69.8 -77.5,72.2 -77.5,74.6 -77.5,77 -77.5,79.4 -77.5,81.8 -77.5,84.2 -77.5,86.6 -77.5,89 -77.5,89 -78.25,89 -79,89 -79.75,89 -80.5,89 -81.25,89 -82,89 -82.75,89 -83.5,89 -84.25,89 -85,86.6 -85,84.2 -85,81.8 -85,79.4 -85,77 -85,74.6 -85,72.2 -85,69.8 -85,67.4 -85,65 -85,65 -84.25,65 -83.5,65 -82.75,65 -82,65 -81.25,65 -80.5,65 -79.75,65 -79,65 -78.25,65 -77.5))"], "date_created": "Mon, 20 Apr 2020 00:00:00 GMT", "description": "This data set was acquired with a Ice Penetrating Radar Altimeter during GAMBIT Twin Otter expedition AGAP_GAMBIT conducted in 2008 (Chief Scientist: Dr. Robin Bell). These data files are of SEGY format and include Reflection Radar shot data and were processed after data collection. Data were acquired as part of the project(s): AGAP: Exploring the Gamburtsev Subglacial Mountains during the International Polar Year 2007 - 2008 and Antarctica\u0027s Gamburtsev Province Project (AGAP).", "east": 89.0, "geometry": ["POINT(77 -81.25)"], "keywords": "Aerogeophysics; AGAP; Airborne Radar; Airplane; Antarctica; East Antarctica; Gamburtsev Mountains; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Sheet; Radar; Radar Echo Sounder", "locations": "East Antarctica; Antarctica; Gamburtsev Mountains", "north": -77.5, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Bell, Robin", "project_titles": "Collaborative Research: IPY: GAMBIT: Gamburtsev Aerogeophysical Mapping of Bedrock and Ice Targets", "projects": [{"proj_uid": "p0000114", "repository": "USAP-DC", "title": "Collaborative Research: IPY: GAMBIT: Gamburtsev Aerogeophysical Mapping of Bedrock and Ice Targets"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -85.0, "title": "Processed Ice Penetrating Radar Altimeter Shot Data (SEGY, version 1) from the Gamburtsev Mountains in Antarctica acquired during the GAMBIT Twin Otter expedition AGAP_GAMBIT (2008)", "uid": "601283", "west": 65.0}, {"awards": "0632292 Bell, Robin", "bounds_geometry": ["POLYGON((65 -77.5,67.4 -77.5,69.8 -77.5,72.2 -77.5,74.6 -77.5,77 -77.5,79.4 -77.5,81.8 -77.5,84.2 -77.5,86.6 -77.5,89 -77.5,89 -78.25,89 -79,89 -79.75,89 -80.5,89 -81.25,89 -82,89 -82.75,89 -83.5,89 -84.25,89 -85,86.6 -85,84.2 -85,81.8 -85,79.4 -85,77 -85,74.6 -85,72.2 -85,69.8 -85,67.4 -85,65 -85,65 -84.25,65 -83.5,65 -82.75,65 -82,65 -81.25,65 -80.5,65 -79.75,65 -79,65 -78.25,65 -77.5))"], "date_created": "Mon, 20 Apr 2020 00:00:00 GMT", "description": "This data set was acquired with a Ice Penetrating Radar Altimeter during GAMBIT Twin Otter expedition AGAP_GAMBIT conducted in 2008 (Chief Scientist: Dr. Robin Bell). These data files are jpeg images of Reflection Radar data and were processed after data collection. Data were acquired as part of the project(s): AGAP: Exploring the Gamburtsev Subglacial Mountains during the International Polar Year 2007 - 2008 and Antarctica\u0027s Gamburtsev Province Project (AGAP).", "east": 89.0, "geometry": ["POINT(77 -81.25)"], "keywords": "AGAP; Airborne Radar; Airplane; Antarctica; East Antarctica; Gamburtsev Mountains; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Sheet; Radar; Radar Echo Sounder", "locations": "Gamburtsev Mountains; Antarctica; East Antarctica", "north": -77.5, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Bell, Robin; Studinger, Michael S.", "project_titles": "Collaborative Research: IPY: GAMBIT: Gamburtsev Aerogeophysical Mapping of Bedrock and Ice Targets", "projects": [{"proj_uid": "p0000114", "repository": "USAP-DC", "title": "Collaborative Research: IPY: GAMBIT: Gamburtsev Aerogeophysical Mapping of Bedrock and Ice Targets"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -85.0, "title": "Processed Ice Penetrating Radar Data (jpeg images) from the Gamburtsev Mountains in Antarctica acquired during GAMBIT ", "uid": "601286", "west": 65.0}, {"awards": "0632292 Bell, Robin", "bounds_geometry": ["POLYGON((65 -77.5,67.4 -77.5,69.8 -77.5,72.2 -77.5,74.6 -77.5,77 -77.5,79.4 -77.5,81.8 -77.5,84.2 -77.5,86.6 -77.5,89 -77.5,89 -78.25,89 -79,89 -79.75,89 -80.5,89 -81.25,89 -82,89 -82.75,89 -83.5,89 -84.25,89 -85,86.6 -85,84.2 -85,81.8 -85,79.4 -85,77 -85,74.6 -85,72.2 -85,69.8 -85,67.4 -85,65 -85,65 -84.25,65 -83.5,65 -82.75,65 -82,65 -81.25,65 -80.5,65 -79.75,65 -79,65 -78.25,65 -77.5))"], "date_created": "Mon, 20 Apr 2020 00:00:00 GMT", "description": "This data set was acquired with a Ice Penetrating Radar Altimeter during GAMBIT Twin Otter expedition AGAP_GAMBIT conducted in 2008 (Chief Scientist: Dr. Robin Bell). These data files are of MATLAB format and include Reflection Radar data and were processed after data collection. Data were acquired as part of the project(s): AGAP: Exploring the Gamburtsev Subglacial Mountains during the International Polar Year 2007 - 2008 and Antarctica\u0027s Gamburtsev Province Project (AGAP).", "east": 89.0, "geometry": ["POINT(77 -81.25)"], "keywords": "Airborne Radar; Airplane; Antarctica; East Antarctica; Gamburtsev Mountains; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Sheet; Radar; Radar Echo Sounder", "locations": "East Antarctica; Gamburtsev Mountains; Antarctica", "north": -77.5, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Bell, Robin; Studinger, Michael S.", "project_titles": "Collaborative Research: IPY: GAMBIT: Gamburtsev Aerogeophysical Mapping of Bedrock and Ice Targets", "projects": [{"proj_uid": "p0000114", "repository": "USAP-DC", "title": "Collaborative Research: IPY: GAMBIT: Gamburtsev Aerogeophysical Mapping of Bedrock and Ice Targets"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -85.0, "title": "Processed Ice Penetrating Radar Data (Matlab format) from the Gamburtsev Mountains in Antarctica acquired during GAMBIT ", "uid": "601284", "west": 65.0}, {"awards": "0632292 Bell, Robin", "bounds_geometry": ["POLYGON((65 -77.5,67.4 -77.5,69.8 -77.5,72.2 -77.5,74.6 -77.5,77 -77.5,79.4 -77.5,81.8 -77.5,84.2 -77.5,86.6 -77.5,89 -77.5,89 -78.25,89 -79,89 -79.75,89 -80.5,89 -81.25,89 -82,89 -82.75,89 -83.5,89 -84.25,89 -85,86.6 -85,84.2 -85,81.8 -85,79.4 -85,77 -85,74.6 -85,72.2 -85,69.8 -85,67.4 -85,65 -85,65 -84.25,65 -83.5,65 -82.75,65 -82,65 -81.25,65 -80.5,65 -79.75,65 -79,65 -78.25,65 -77.5))"], "date_created": "Mon, 20 Apr 2020 00:00:00 GMT", "description": "This data set was acquired with a Ice Penetrating Radar Altimeter during GAMBIT Twin Otter expedition AGAP_GAMBIT conducted in 2008 (Chief Scientist: Dr. Robin Bell). These data files are of Netcdf format and include Reflection Radar data and were processed after data collection. Data were acquired as part of the project(s): AGAP: Exploring the Gamburtsev Subglacial Mountains during the International Polar Year 2007 - 2008 and Antarctica\u0027s Gamburtsev Province Project (AGAP).", "east": 89.0, "geometry": ["POINT(77 -81.25)"], "keywords": "Airborne Radar; Airplane; Antarctica; East Antarctica; Gamburtsev Mountains; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Sheet; Radar Echo Sounder", "locations": "Gamburtsev Mountains; Antarctica; East Antarctica", "north": -77.5, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Bell, Robin; Studinger, Michael S.", "project_titles": "Collaborative Research: IPY: GAMBIT: Gamburtsev Aerogeophysical Mapping of Bedrock and Ice Targets", "projects": [{"proj_uid": "p0000114", "repository": "USAP-DC", "title": "Collaborative Research: IPY: GAMBIT: Gamburtsev Aerogeophysical Mapping of Bedrock and Ice Targets"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -85.0, "title": "Processed Ice Penetrating Radar Data (Netcdf format) from the Gamburtsev Mountains in Antarctica acquired during GAMBIT ", "uid": "601285", "west": 65.0}, {"awards": "1443471 Koutnik, Michelle", "bounds_geometry": ["POINT(-98.16 -89.99)"], "date_created": "Wed, 25 Mar 2020 00:00:00 GMT", "description": "The South Pole Ice Core (SPICEcore), which spans the past 54,300 years, was drilled far from an ice divide such that ice recovered at depth originated upstream of the core site. If the climate is different upstream, the climate history recovered from the core will be a combination of the upstream conditions advected to the core site and temporal changes. Here, we evaluate the impact of ice advection on two fundamental records from SPICEcore: accumulation rate and water isotopes. We determined past locations of ice deposition based on GPS measurements of the modern velocity field spanning 100 km upstream, where ice of ~20 ka age would likely have originated. Beyond 100 km, there are no velocity measurements, but ice likely originates from Titan Dome, an additional 90 km distant. Shallow radar measurements extending 100 km upstream from the core site reveal large (~20%) variations in accumulation but no significant trend. Water isotope ratios, measured at 12.5 km intervals for the first 100 km of the flowline, show a decrease with elevation of -0.008\u2030 m-1 for \u03b418O. Advection adds approximately 1\u2030 for \u03b418O to the LGM-to-modern change. We also use an existing ensemble of continental ice-sheet model runs to assess the ice sheet elevation change through time. The magnitude of elevation change is likely small and the sign uncertain. Assuming a lapse rate of 10\u00b0C per km of elevation, the inference of LGM-to-modern temperature change is ~1.4\u00b0C smaller than if the flow from upstream is not considered. ", "east": -98.16, "geometry": ["POINT(-98.16 -89.99)"], "keywords": "Antarctica; Ice Core Data; South Pole; SPICEcore", "locations": "South Pole; Antarctica", "north": -89.99, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Fudge, T. J.", "project_titles": "Collaborative Research: Characterization of Upstream Ice and Firn Dynamics affecting the South Pole Ice Core", "projects": [{"proj_uid": "p0000200", "repository": "USAP-DC", "title": "Collaborative Research: Characterization of Upstream Ice and Firn Dynamics affecting the South Pole Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -89.99, "title": "SPICEcore Advection", "uid": "601266", "west": -98.16}, {"awards": "1443534 Bell, Robin", "bounds_geometry": ["POLYGON((-180 -77,-177 -77,-174 -77,-171 -77,-168 -77,-165 -77,-162 -77,-159 -77,-156 -77,-153 -77,-150 -77,-150 -77.9,-150 -78.8,-150 -79.7,-150 -80.6,-150 -81.5,-150 -82.4,-150 -83.3,-150 -84.2,-150 -85.1,-150 -86,-153 -86,-156 -86,-159 -86,-162 -86,-165 -86,-168 -86,-171 -86,-174 -86,-177 -86,180 -86,178.1 -86,176.2 -86,174.3 -86,172.4 -86,170.5 -86,168.6 -86,166.7 -86,164.8 -86,162.9 -86,161 -86,161 -85.1,161 -84.2,161 -83.3,161 -82.4,161 -81.5,161 -80.6,161 -79.7,161 -78.8,161 -77.9,161 -77,162.9 -77,164.8 -77,166.7 -77,168.6 -77,170.5 -77,172.4 -77,174.3 -77,176.2 -77,178.1 -77,-180 -77))"], "date_created": "Fri, 10 Jan 2020 00:00:00 GMT", "description": "This dataset was produced for the manuscript \\\"Multi-decadal basal melt rates and structure of the Ross Ice Shelf, Antarctica using airborne ice penetrating radar\\\" by Das et al., 2020 in Journal of Geophysical Research-Earth Surface. It has total ice thickness, thickness of the LMI layer, strain induced thickness change, basal melt rates and the error estimate for basal melt rates.", "east": 161.0, "geometry": ["POINT(-174.5 -81.5)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Penetrating Radar; Ice-Shelf Basal Melting; Radar Echo Sounder; Radar Echo Sounding; Snow/ice; Snow/Ice", "locations": "Antarctica", "north": -77.0, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Das, Indrani; Padman, Laurence; Bell, Robin; Fricker, Helen; Hulbe, Christina; Siddoway, Christine; Dhakal, Tejendra; Frearson, Nicholas; Mosbeux, Cyrille; Cordero, Isabel; Tinto, Kirsty; Siegfried, Matthew", "project_titles": "Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE)", "projects": [{"proj_uid": "p0010035", "repository": "USAP-DC", "title": "Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -86.0, "title": "Basal Melt, Ice thickness and structure of the Ross Ice Shelf using airborne radar data", "uid": "601242", "west": -150.0}, {"awards": "9896041 Padman, Laurence; 1443677 Padman, Laurence", "bounds_geometry": ["POLYGON((-180 -40.231,-144 -40.231,-108 -40.231,-72 -40.231,-36 -40.231,0 -40.231,36 -40.231,72 -40.231,108 -40.231,144 -40.231,180 -40.231,180 -45.2079,180 -50.1848,180 -55.1617,180 -60.1386,180 -65.1155,180 -70.0924,180 -75.0693,180 -80.0462,180 -85.0231,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -85.0231,-180 -80.0462,-180 -75.0693,-180 -70.0924,-180 -65.1155,-180 -60.1386,-180 -55.1617,-180 -50.1848,-180 -45.2079,-180 -40.231))"], "date_created": "Thu, 19 Dec 2019 00:00:00 GMT", "description": "CATS2008 is a regional inverse barotropic tide model for the circum-Antarctic ocean on a 4 km grid. The model domain includes ocean cavities under the floating ice shelves. The coastline is based on the MODIS MOA [Scambos et al., 2007; Remote Sensing of Environment] feature identification files, adjusted to match ICESat-derived grounding lines for the Ross and Filchner-Ronne ice shelves and Interferometric Synthetic Aperture Radar (InSAR) grounding lines. The water depth map for open water is based on the 2007 release update to Smith and Sandwell [1997; Science]. Adjustments to this map have been made in various regions, including the open continental shelf in front of the Larsen-C Ice Shelf which has been blended with GEBCO bathymetry.\r\n\nModel type: Tides only; Inverse (data assimilation); barotropic (no vertical variation of currents). \nGrid: 4-km uniform polar stereographic (centered at 71 degrees S, 70 degrees W) \nConstituents: M2, S2, N2, K2, K1, O1, P1, Q1, Mf, Mm. \nUnits: z (sea surface height; meters); u,v (currents; cm/s); U,V (transports; m2/s). \nCoordinates: Currents (u, v) and depth-integrated transports (U, V) are given as East (u, U) and North (v, V) components. \nCitation: \"\u2026 an update to the inverse model described by Padman et al. [2002].\" \n\nSee CATS2008_README.pdf for further details.\r", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Inverse Modeling; Model Data; Ocean Currents; Sea Surface; Tidal Models; Tides", "locations": "Antarctica; Sea Surface", "north": -40.231, "nsf_funding_programs": "Antarctic Ocean and Atmospheric Sciences", "persons": "Howard, Susan L.; Padman, Laurence; Erofeeva, Svetlana", "project_titles": "Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE); Ocean Tides around Antarctica and in the Southern Ocean", "projects": [{"proj_uid": "p0010116", "repository": "USAP-DC", "title": "Ocean Tides around Antarctica and in the Southern Ocean"}, {"proj_uid": "p0010035", "repository": "USAP-DC", "title": "Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "CATS2008: Circum-Antarctic Tidal Simulation version 2008", "uid": "601235", "west": -180.0}, {"awards": "1745137 Schroeder, Dustin", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Wed, 02 Oct 2019 00:00:00 GMT", "description": "These data accompany the paper \"Antarctic Topographic Realizations and Geostatistical Modeling Used to Map Subglacial Lakes\" (MacKie et al., in review). This dataset contains 100 geostatistically generated subglacial topographic realizations for Antarctica. Data science techniques were used to calculate the probability of the occurrence of radar-detected lakes and altimetry-detected (active) lakes across the continent, using each topographic realization as a parameter. This generated 100 probability maps of the likelihood of radar-detected lake occurrence and 100 probability maps of active lake occurrence. Further statistics were used to generate 100 binary maps showing expected radar-detected lake locations. The ensemble of realizations can be used for uncertainty quantification.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Active Lakes; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Sheet Model; Model Data; Snow/ice; Snow/Ice; Subglacial Lakes; Topography", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "MacKie, Emma; Schroeder, Dustin; Caers, Jef; Scheidt, Celine; Siegfried, Matthew", "project_titles": "CAREER: Cross-Instrument Synthesis of Antarctic Radar Sounding Observations", "projects": [{"proj_uid": "p0010058", "repository": "USAP-DC", "title": "CAREER: Cross-Instrument Synthesis of Antarctic Radar Sounding Observations"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Antarctic topographic and subglacial lake geostatistical simulations", "uid": "601213", "west": -180.0}, {"awards": "1443356 Conway, Howard; 1443552 Paul Winberry, J.", "bounds_geometry": ["POLYGON((-174.95 -82.65,-174.35 -82.65,-173.75 -82.65,-173.15 -82.65,-172.55 -82.65,-171.95 -82.65,-171.35 -82.65,-170.75 -82.65,-170.15 -82.65,-169.55 -82.65,-168.95 -82.65,-168.95 -82.729,-168.95 -82.808,-168.95 -82.887,-168.95 -82.966,-168.95 -83.045,-168.95 -83.124,-168.95 -83.203,-168.95 -83.282,-168.95 -83.361,-168.95 -83.44,-169.55 -83.44,-170.15 -83.44,-170.75 -83.44,-171.35 -83.44,-171.95 -83.44,-172.55 -83.44,-173.15 -83.44,-173.75 -83.44,-174.35 -83.44,-174.95 -83.44,-174.95 -83.361,-174.95 -83.282,-174.95 -83.203,-174.95 -83.124,-174.95 -83.045,-174.95 -82.966,-174.95 -82.887,-174.95 -82.808,-174.95 -82.729,-174.95 -82.65))"], "date_created": "Mon, 20 May 2019 00:00:00 GMT", "description": "This data set contains radar-detected measurements of surface topography, internal stratigraphy, ice thickness and derived bed topography across Crary Ice Rise in the Ross Sea Embayment.", "east": -168.95, "geometry": ["POINT(-171.95 -83.045)"], "keywords": "Antarctica; Bed Elevation; Crary Ice Rise; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Ice Penetrating Radar; Ice Sheet Elevation; Ice Shelf; Ice Thickness; Internal Stratigraphy; Radar; Ross Ice Shelf; Snow/ice; Snow/Ice; Surface Elevation", "locations": "Ross Ice Shelf; Antarctica; Crary Ice Rise", "north": -82.65, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Conway, Howard; Koutnik, Michelle; Winberry, Paul; Paden, John", "project_titles": "Collaborative Research: Grounding Line Dynamics: Crary Ice Rise Revisited", "projects": [{"proj_uid": "p0010026", "repository": "USAP-DC", "title": "Collaborative Research: Grounding Line Dynamics: Crary Ice Rise Revisited"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -83.44, "title": "Geophysical data from Crary Ice Rise, Ross Sea Embayment", "uid": "601181", "west": -174.95}, {"awards": "1144177 Pettit, Erin", "bounds_geometry": ["POLYGON((161.8 -77.7,161.88 -77.7,161.96 -77.7,162.04 -77.7,162.12 -77.7,162.2 -77.7,162.28 -77.7,162.36 -77.7,162.44 -77.7,162.52 -77.7,162.6 -77.7,162.6 -77.707,162.6 -77.714,162.6 -77.721,162.6 -77.728,162.6 -77.735,162.6 -77.742,162.6 -77.749,162.6 -77.756,162.6 -77.763,162.6 -77.77,162.52 -77.77,162.44 -77.77,162.36 -77.77,162.28 -77.77,162.2 -77.77,162.12 -77.77,162.04 -77.77,161.96 -77.77,161.88 -77.77,161.8 -77.77,161.8 -77.763,161.8 -77.756,161.8 -77.749,161.8 -77.742,161.8 -77.735,161.8 -77.728,161.8 -77.721,161.8 -77.714,161.8 -77.707,161.8 -77.7))"], "date_created": "Mon, 18 Mar 2019 00:00:00 GMT", "description": "This data set contains GPR data along multiple transects of the Blood Falls feature collected in November and Dcember 2013. ", "east": 162.6, "geometry": ["POINT(162.2 -77.735)"], "keywords": "Antarctica; Basal Crevassing; Glacier Hydrology; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Radar; Snow/ice; Snow/Ice; Taylor Glacier", "locations": "Taylor Glacier; Antarctica", "north": -77.7, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Pettit, Erin", "project_titles": "Collaborative Research: MIDGE: Minimally Invasive Direct Glacial Exploration of Biogeochemistry, Hydrology and Glaciology of Blood Falls, McMurdo Dry Valleys", "projects": [{"proj_uid": "p0000002", "repository": "USAP-DC", "title": "Collaborative Research: MIDGE: Minimally Invasive Direct Glacial Exploration of Biogeochemistry, Hydrology and Glaciology of Blood Falls, McMurdo Dry Valleys"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.77, "title": "Ground Penetrating Radar Data near Blood Falls, Taylor Glacier", "uid": "601165", "west": 161.8}, {"awards": "1144177 Pettit, Erin", "bounds_geometry": ["POLYGON((161.8 -77.7,161.88 -77.7,161.96 -77.7,162.04 -77.7,162.12 -77.7,162.2 -77.7,162.28 -77.7,162.36 -77.7,162.44 -77.7,162.52 -77.7,162.6 -77.7,162.6 -77.707,162.6 -77.714,162.6 -77.721,162.6 -77.728,162.6 -77.735,162.6 -77.742,162.6 -77.749,162.6 -77.756,162.6 -77.763,162.6 -77.77,162.52 -77.77,162.44 -77.77,162.36 -77.77,162.28 -77.77,162.2 -77.77,162.12 -77.77,162.04 -77.77,161.96 -77.77,161.88 -77.77,161.8 -77.77,161.8 -77.763,161.8 -77.756,161.8 -77.749,161.8 -77.742,161.8 -77.735,161.8 -77.728,161.8 -77.721,161.8 -77.714,161.8 -77.707,161.8 -77.7))"], "date_created": "Mon, 18 Mar 2019 00:00:00 GMT", "description": "This data set contains GPR data along multiple transects of the Blood Falls feature collected in November and Dcember 2013. ", "east": 162.6, "geometry": ["POINT(162.2 -77.735)"], "keywords": "Antarctica; Basal Crevassing; Glacier Hydrology; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Radar; Snow/ice; Snow/Ice; Taylor Glacier", "locations": "Taylor Glacier; Antarctica", "north": -77.7, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Pettit, Erin", "project_titles": "Collaborative Research: MIDGE: Minimally Invasive Direct Glacial Exploration of Biogeochemistry, Hydrology and Glaciology of Blood Falls, McMurdo Dry Valleys", "projects": [{"proj_uid": "p0000002", "repository": "USAP-DC", "title": "Collaborative Research: MIDGE: Minimally Invasive Direct Glacial Exploration of Biogeochemistry, Hydrology and Glaciology of Blood Falls, McMurdo Dry Valleys"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.77, "title": "Terrestrial Radar Interferometry near Blood Falls, Taylor Glacier", "uid": "601166", "west": 161.8}, {"awards": "0838947 Tulaczyk, Slawek", "bounds_geometry": ["POLYGON((-165.28 -84.24,-165.086 -84.24,-164.892 -84.24,-164.698 -84.24,-164.504 -84.24,-164.31 -84.24,-164.116 -84.24,-163.922 -84.24,-163.728 -84.24,-163.534 -84.24,-163.34 -84.24,-163.34 -84.252,-163.34 -84.264,-163.34 -84.276,-163.34 -84.288,-163.34 -84.3,-163.34 -84.312,-163.34 -84.324,-163.34 -84.336,-163.34 -84.348,-163.34 -84.36,-163.534 -84.36,-163.728 -84.36,-163.922 -84.36,-164.116 -84.36,-164.31 -84.36,-164.504 -84.36,-164.698 -84.36,-164.892 -84.36,-165.086 -84.36,-165.28 -84.36,-165.28 -84.348,-165.28 -84.336,-165.28 -84.324,-165.28 -84.312,-165.28 -84.3,-165.28 -84.288,-165.28 -84.276,-165.28 -84.264,-165.28 -84.252,-165.28 -84.24))"], "date_created": "Sun, 09 Sep 2018 00:00:00 GMT", "description": "This dataset contains ice-shelf basal melt rates and vertical strain rates for 11 sites near the Whillans Ice Stream grounding line. These rates were determined using Autonomous Phase-Sensitive Radar. Data processing is described in Begeman et al. 2018, JGR Oceans. These sites are concentrated within an embayment of the Ross Ice Shelf. These melt rates and strain rates were determined over periods ranging from 10 to 38 days in December 2014 to January 2015. ", "east": -163.34, "geometry": ["POINT(-164.31 -84.3)"], "keywords": "Antarctica; Flexure Zone; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Shelf; Ice-Shelf Basal Melting; Ice-Shelf Strain Rate", "locations": "Antarctica", "north": -84.24, "nsf_funding_programs": "Antarctic Integrated System Science", "persons": "Begeman, Carolyn", "project_titles": "Collaborative Research: Integrative Study of Marine Ice Sheet Stability \u0026 Subglacial Life Habitats in W Antarctica - Lake \u0026 Ice Stream Subglacial Access Research Drilling (LISSARD)", "projects": [{"proj_uid": "p0000105", "repository": "USAP-DC", "title": "Collaborative Research: Integrative Study of Marine Ice Sheet Stability \u0026 Subglacial Life Habitats in W Antarctica - Lake \u0026 Ice Stream Subglacial Access Research Drilling (LISSARD)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WISSARD", "south": -84.36, "title": "Basal melt rates of the Ross Ice Shelf near the Whillans Ice Stream grounding line", "uid": "601122", "west": -165.28}, {"awards": "1141866 Conway, Howard", "bounds_geometry": ["POLYGON((165.656 -83.357,166.3059 -83.357,166.9558 -83.357,167.6057 -83.357,168.2556 -83.357,168.9055 -83.357,169.5554 -83.357,170.2053 -83.357,170.8552 -83.357,171.5051 -83.357,172.155 -83.357,172.155 -83.6036,172.155 -83.8502,172.155 -84.0968,172.155 -84.3434,172.155 -84.59,172.155 -84.8366,172.155 -85.0832,172.155 -85.3298,172.155 -85.5764,172.155 -85.823,171.5051 -85.823,170.8552 -85.823,170.2053 -85.823,169.5554 -85.823,168.9055 -85.823,168.2556 -85.823,167.6057 -85.823,166.9558 -85.823,166.3059 -85.823,165.656 -85.823,165.656 -85.5764,165.656 -85.3298,165.656 -85.0832,165.656 -84.8366,165.656 -84.59,165.656 -84.3434,165.656 -84.0968,165.656 -83.8502,165.656 -83.6036,165.656 -83.357))"], "date_created": "Sun, 09 Sep 2018 00:00:00 GMT", "description": "This data set contains radar-detected measurements of surface topography, ice thickness and derived bed topography across Beardmore Glacier and its tributary Mill Glacier.", "east": 172.155, "geometry": ["POINT(168.9055 -84.59)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Thickness; Radar", "locations": "Antarctica", "north": -83.357, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Conway, Howard", "project_titles": "Collaborative Research: East Antarctic Outlet Glacier Dynamics", "projects": [{"proj_uid": "p0000437", "repository": "USAP-DC", "title": "Collaborative Research: East Antarctic Outlet Glacier Dynamics"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -85.823, "title": "Geophysical measurements Beardmore Glacier, Antarctica", "uid": "601121", "west": 165.656}, {"awards": "1245915 Ray, Laura", "bounds_geometry": ["POLYGON((168.36 -78.03,168.384 -78.03,168.408 -78.03,168.432 -78.03,168.456 -78.03,168.48 -78.03,168.504 -78.03,168.528 -78.03,168.552 -78.03,168.576 -78.03,168.6 -78.03,168.6 -78.035,168.6 -78.04,168.6 -78.045,168.6 -78.05,168.6 -78.055,168.6 -78.06,168.6 -78.065,168.6 -78.07,168.6 -78.075,168.6 -78.08,168.576 -78.08,168.552 -78.08,168.528 -78.08,168.504 -78.08,168.48 -78.08,168.456 -78.08,168.432 -78.08,168.408 -78.08,168.384 -78.08,168.36 -78.08,168.36 -78.075,168.36 -78.07,168.36 -78.065,168.36 -78.06,168.36 -78.055,168.36 -78.05,168.36 -78.045,168.36 -78.04,168.36 -78.035,168.36 -78.03))"], "date_created": "Thu, 07 Jun 2018 00:00:00 GMT", "description": "This dataset is comprised of ground penetrating radar data (GSSI DZT format with DZG files for GPS location) of a 28 square km area conduced in the heavily crevassed McMurdo Shear Zone in two consecutive field seasons. A radar system comprised of a GSSI SIR-30 32-bit two-channel control unit and model 5103 \u201c400 MHz\u201d and Model 5106A \u201c200 MHz\u201d antenna units were used to conduct the GPR surveys. The radar system was mounted on a sled and towed by a robot. The robot surveyed the 5 x 5.7 km area on lines separated by 50-m and traveled from West to East and return. The 2014 survey was conducted between Oct 29, 2014 and Nov 9, 2014, and the 2015 survey was conducted between Oct 26, 2015 and Nov 1, 2015. The use of identical waypoints in each year provides an Eulerian sampling protocol, where sampled GPS locations remain fixed, but the ice moves between annual surveys. In 2014, the 400 MHz antenna imaged to a depth of 19 meters, and in 2015, the 400 MHz antenna imaged to a depth of 80 meters to examine englacial ice. In both years, the 200 MHz antenna imaged to a depth of 160 meters.", "east": 168.6, "geometry": ["POINT(168.48 -78.055)"], "keywords": "Antarctica; Firn; Folds; Geology/Geophysics - Other; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Snow/ice; Snow/Ice", "locations": "Antarctica", "north": -78.03, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Ray, Laura; Arcone, Steven; Kaluzienski, Lynn; Koons, Peter; Lever, Jim; Walker, Ben", "project_titles": "Collaborative Research: Flow and Fracture Dynamics in an Ice Shelf Lateral Margin: Observations and Modeling of the McMurdo Shear Zone", "projects": [{"proj_uid": "p0000701", "repository": "USAP-DC", "title": "Collaborative Research: Flow and Fracture Dynamics in an Ice Shelf Lateral Margin: Observations and Modeling of the McMurdo Shear Zone"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.08, "title": "Ground Penetrating Radar Grid Survey of the McMurdo Shear Zone", "uid": "601102", "west": 168.36}, {"awards": "1443471 Koutnik, Michelle", "bounds_geometry": ["POLYGON((110 -89,117 -89,124 -89,131 -89,138 -89,145 -89,152 -89,159 -89,166 -89,173 -89,180 -89,180 -89.1,180 -89.2,180 -89.3,180 -89.4,180 -89.5,180 -89.6,180 -89.7,180 -89.8,180 -89.9,180 -90,173 -90,166 -90,159 -90,152 -90,145 -90,138 -90,131 -90,124 -90,117 -90,110 -90,110 -89.9,110 -89.8,110 -89.7,110 -89.6,110 -89.5,110 -89.4,110 -89.3,110 -89.2,110 -89.1,110 -89))"], "date_created": "Fri, 25 May 2018 00:00:00 GMT", "description": "These are 200MHz radar data collected upstream of South Pole during the 2016/17 and 2017/18 field seasons. Data are the raw files produced by the GSSI radar controller, and a set of layer picks.", "east": 180.0, "geometry": ["POINT(145 -89.5)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Radar; Snow Accumulation; Snow/ice; Snow/Ice", "locations": "Antarctica", "north": -89.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Lilien, David; Fudge, T. J.; Koutnik, Michelle; Conway, Howard; Waddington, Edwin D.", "project_titles": "Collaborative Research: Characterization of Upstream Ice and Firn Dynamics affecting the South Pole Ice Core", "projects": [{"proj_uid": "p0000200", "repository": "USAP-DC", "title": "Collaborative Research: Characterization of Upstream Ice and Firn Dynamics affecting the South Pole Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "SPICEcore", "south": -90.0, "title": "Shallow radar near South Pole", "uid": "601099", "west": 110.0}, {"awards": "1565576 Pettit, Erin", "bounds_geometry": ["POLYGON((-62.2 -65.5,-62.12 -65.5,-62.04 -65.5,-61.96 -65.5,-61.88 -65.5,-61.8 -65.5,-61.72 -65.5,-61.64 -65.5,-61.56 -65.5,-61.48 -65.5,-61.4 -65.5,-61.4 -65.53,-61.4 -65.56,-61.4 -65.59,-61.4 -65.62,-61.4 -65.65,-61.4 -65.68,-61.4 -65.71,-61.4 -65.74,-61.4 -65.77,-61.4 -65.8,-61.48 -65.8,-61.56 -65.8,-61.64 -65.8,-61.72 -65.8,-61.8 -65.8,-61.88 -65.8,-61.96 -65.8,-62.04 -65.8,-62.12 -65.8,-62.2 -65.8,-62.2 -65.77,-62.2 -65.74,-62.2 -65.71,-62.2 -65.68,-62.2 -65.65,-62.2 -65.62,-62.2 -65.59,-62.2 -65.56,-62.2 -65.53,-62.2 -65.5))"], "date_created": "Wed, 20 Dec 2017 00:00:00 GMT", "description": "A terrestrial radar interferometer was set up at a location overlooking a remnant of the Larsen B iceshelf and the adjacent fast ice. Images were acquired every 4 minutes with a Gamma Portable Radar Interferometer - 2. Data include images from two antennas, to allow the generation of interferometric DEMs, as well as line-of-sight displacement fields between consecutive images. The archived data are single-look complex (SLC) images, together with parameter files.", "east": -61.4, "geometry": ["POINT(-61.8 -65.65)"], "keywords": "Antarctica; Antarctic Peninsula; Elevation; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Navigation; Radar; Radar Interferometer", "locations": "Antarctica; Antarctic Peninsula", "north": -65.5, "nsf_funding_programs": "Antarctic Integrated System Science; Antarctic Glaciology", "persons": "Truffer, Martin", "project_titles": "RAPID: Observing the Disintegration of the Scar Inlet Ice Shelf", "projects": [{"proj_uid": "p0000274", "repository": "USAP-DC", "title": "RAPID: Observing the Disintegration of the Scar Inlet Ice Shelf"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.8, "title": "Scar Inlet Terrestrial Radar Interferometry", "uid": "601078", "west": -62.2}, {"awards": "0944307 Conway, Howard", "bounds_geometry": ["POLYGON((-162.83 -79.15,-162.637 -79.15,-162.444 -79.15,-162.251 -79.15,-162.058 -79.15,-161.865 -79.15,-161.672 -79.15,-161.479 -79.15,-161.286 -79.15,-161.093 -79.15,-160.9 -79.15,-160.9 -79.1885037,-160.9 -79.2270074,-160.9 -79.2655111,-160.9 -79.3040148,-160.9 -79.3425185,-160.9 -79.3810222,-160.9 -79.4195259,-160.9 -79.4580296,-160.9 -79.4965333,-160.9 -79.535037,-161.093 -79.535037,-161.286 -79.535037,-161.479 -79.535037,-161.672 -79.535037,-161.865 -79.535037,-162.058 -79.535037,-162.251 -79.535037,-162.444 -79.535037,-162.637 -79.535037,-162.83 -79.535037,-162.83 -79.4965333,-162.83 -79.4580296,-162.83 -79.4195259,-162.83 -79.3810222,-162.83 -79.3425185,-162.83 -79.3040148,-162.83 -79.2655111,-162.83 -79.2270074,-162.83 -79.1885037,-162.83 -79.15))"], "date_created": "Thu, 16 Nov 2017 00:00:00 GMT", "description": "Ground-based radar data include radar echograms and .mat files of internal stratigraphy. Also included are picks of ice thickness and surface elevation. \u003cbr\u003e GPS data include positions of 142 poles set in 2010 and resurveyed in 2012. Also given are velocity vectors for the poles. ", "east": -160.9, "geometry": ["POINT(-161.865 -79.3425185)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; GPS Data; Ice Velocity; Navigation; Radar; Roosevelt Island; Ross Sea", "locations": "Roosevelt Island; Antarctica; Ross Sea", "north": -79.15, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Earth Sciences", "persons": "Conway, Howard", "project_titles": "Collaborative Research: Deglaciation of the Ross Sea Embayment - constraints from Roosevelt Island", "projects": [{"proj_uid": "p0000272", "repository": "USAP-DC", "title": "Collaborative Research: Deglaciation of the Ross Sea Embayment - constraints from Roosevelt Island"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.535037, "title": "Roosevelt Island: Radar and GPS", "uid": "601070", "west": -162.83}, {"awards": "0732946 Steffen, Konrad", "bounds_geometry": ["POLYGON((-66 -66,-65.4 -66,-64.8 -66,-64.2 -66,-63.6 -66,-63 -66,-62.4 -66,-61.8 -66,-61.2 -66,-60.6 -66,-60 -66,-60 -66.4,-60 -66.8,-60 -67.2,-60 -67.6,-60 -68,-60 -68.4,-60 -68.8,-60 -69.2,-60 -69.6,-60 -70,-60.6 -70,-61.2 -70,-61.8 -70,-62.4 -70,-63 -70,-63.6 -70,-64.2 -70,-64.8 -70,-65.4 -70,-66 -70,-66 -69.6,-66 -69.2,-66 -68.8,-66 -68.4,-66 -68,-66 -67.6,-66 -67.2,-66 -66.8,-66 -66.4,-66 -66))"], "date_created": "Wed, 13 Sep 2017 00:00:00 GMT", "description": "We produce a reconstruction of surface mass balance (SMB) (in mm w.e. per year) by adjusting the 1979-2014 RACMO2 SMB to the spatial pattern of ground-penetrating radar observations and to observations of SMB from sonic height rangers.", "east": -60.0, "geometry": ["POINT(-63 -68)"], "keywords": "Antarctica; Antarctic Peninsula; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Larsen C Ice Shelf; Radar", "locations": "Antarctica; Larsen C Ice Shelf; Antarctic Peninsula", "north": -66.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "McGrath, Daniel; Steffen, Konrad; Kuipers Munneke, Peter", "project_titles": "IPY: Stability of Larsen C Ice Shelf in a Warming Climate", "projects": [{"proj_uid": "p0000087", "repository": "USAP-DC", "title": "IPY: Stability of Larsen C Ice Shelf in a Warming Climate"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -70.0, "title": "Mean surface mass balance over Larsen C ice shelf, Antarctica (1979-2014), assimilated to in situ GPR and snow height data", "uid": "601056", "west": -66.0}, {"awards": "0424589 Gogineni, S. Prasad", "bounds_geometry": ["POLYGON((143 -74.2,155.9 -74.2,168.8 -74.2,181.7 -74.2,194.6 -74.2,207.5 -74.2,220.4 -74.2,233.3 -74.2,246.2 -74.2,259.1 -74.2,272 -74.2,272 -75.5,272 -76.8,272 -78.1,272 -79.4,272 -80.7,272 -82,272 -83.3,272 -84.6,272 -85.9,272 -87.2,259.1 -87.2,246.2 -87.2,233.3 -87.2,220.4 -87.2,207.5 -87.2,194.6 -87.2,181.7 -87.2,168.8 -87.2,155.9 -87.2,143 -87.2,143 -85.9,143 -84.6,143 -83.3,143 -82,143 -80.7,143 -79.4,143 -78.1,143 -76.8,143 -75.5,143 -74.2))"], "date_created": "Mon, 28 Aug 2017 00:00:00 GMT", "description": "The MCoRDS data set contains L1B Geolocated Radar Echo Strength Profile Images and L2 Ice Thickness, Ice Surface, and Ice Bottom elevations over Antarctica taken with the CReSIS Radar Depth Sounders (RDS). The L1B data set includes measurements for echograms, time, latitude, longitude, elevation, as well as flight path charts and echogram images.The L2 data set includes measurements for time, latitude, longitude, elevation, surface, bottom, and thickness.", "east": 272.0, "geometry": ["POINT(-152.5 -80.7)"], "keywords": "Airborne Radar; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; MCoRDS; Navigation; Radar", "locations": "Antarctica", "north": -74.2, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Paden, John; Leuschen, Carl; Rodriguez, Fernando; Li, Jilu; Allen, Chris; Gogineni, Prasad", "project_titles": "Center for Remote Sensing of Ice Sheets (CReSIS)", "projects": [{"proj_uid": "p0000102", "repository": "USAP-DC", "title": "Center for Remote Sensing of Ice Sheets (CReSIS)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -87.2, "title": "Radar Depth Sounder Echograms and Ice Thickness", "uid": "601047", "west": 143.0}, {"awards": "0424589 Gogineni, S. Prasad", "bounds_geometry": ["POLYGON((163.9 -76.5,164.09 -76.5,164.28 -76.5,164.47 -76.5,164.66 -76.5,164.85 -76.5,165.04 -76.5,165.23 -76.5,165.42 -76.5,165.61 -76.5,165.8 -76.5,165.8 -76.57,165.8 -76.64,165.8 -76.71,165.8 -76.78,165.8 -76.85,165.8 -76.92,165.8 -76.99,165.8 -77.06,165.8 -77.13,165.8 -77.2,165.61 -77.2,165.42 -77.2,165.23 -77.2,165.04 -77.2,164.85 -77.2,164.66 -77.2,164.47 -77.2,164.28 -77.2,164.09 -77.2,163.9 -77.2,163.9 -77.13,163.9 -77.06,163.9 -76.99,163.9 -76.92,163.9 -76.85,163.9 -76.78,163.9 -76.71,163.9 -76.64,163.9 -76.57,163.9 -76.5))"], "date_created": "Mon, 28 Aug 2017 00:00:00 GMT", "description": "The Snow Radar data set contains L1B Geolocated Radar Echo Strength Profiles over Antarctica taken with the CReSIS snow radar.\r\r\nThe L1B data set includes echograms with measurements for time, latitude, longitude, elevation, as well as flight path charts and echogram images.", "east": 165.8, "geometry": ["POINT(164.85 -76.85)"], "keywords": "Airborne Radar; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Navigation; Radar; Snow", "locations": "Antarctica", "north": -76.5, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Paden, John; Leuschen, Carl; Rodriguez, Fernando; Li, Jilu; Allen, Chris; Gogineni, Prasad", "project_titles": "Center for Remote Sensing of Ice Sheets (CReSIS)", "projects": [{"proj_uid": "p0000102", "repository": "USAP-DC", "title": "Center for Remote Sensing of Ice Sheets (CReSIS)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.2, "title": "Snow Radar Echograms", "uid": "601049", "west": 163.9}, {"awards": "0424589 Gogineni, S. Prasad", "bounds_geometry": ["POLYGON((143 -76.5,145.61 -76.5,148.22 -76.5,150.83 -76.5,153.44 -76.5,156.05 -76.5,158.66 -76.5,161.27 -76.5,163.88 -76.5,166.49 -76.5,169.1 -76.5,169.1 -77.07,169.1 -77.64,169.1 -78.21,169.1 -78.78,169.1 -79.35,169.1 -79.92,169.1 -80.49,169.1 -81.06,169.1 -81.63,169.1 -82.2,166.49 -82.2,163.88 -82.2,161.27 -82.2,158.66 -82.2,156.05 -82.2,153.44 -82.2,150.83 -82.2,148.22 -82.2,145.61 -82.2,143 -82.2,143 -81.63,143 -81.06,143 -80.49,143 -79.92,143 -79.35,143 -78.78,143 -78.21,143 -77.64,143 -77.07,143 -76.5))"], "date_created": "Mon, 28 Aug 2017 00:00:00 GMT", "description": "The Ku-band Radar data set contains L1B Geolocated Radar Echo Strength Profiles over Antarctica taken with the CReSIS Ku-band Radar. The L1B data set includes echograms with measurements for time, latitude, longitude, elevation, as well as flight path charts and echogram images.", "east": 169.1, "geometry": ["POINT(156.05 -79.35)"], "keywords": "Airborne Radar; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ku-Band; Navigation; Radar", "locations": "Antarctica", "north": -76.5, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Paden, John; Leuschen, Carl; Rodriguez, Fernando; Li, Jilu; Allen, Chris; Gogineni, Prasad", "project_titles": "Center for Remote Sensing of Ice Sheets (CReSIS)", "projects": [{"proj_uid": "p0000102", "repository": "USAP-DC", "title": "Center for Remote Sensing of Ice Sheets (CReSIS)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -82.2, "title": "Ku-band Radar Echograms", "uid": "601048", "west": 143.0}, {"awards": "1443260 Conway, Howard", "bounds_geometry": ["POLYGON((159.02 -76.67,159.057 -76.67,159.094 -76.67,159.131 -76.67,159.168 -76.67,159.205 -76.67,159.242 -76.67,159.279 -76.67,159.316 -76.67,159.353 -76.67,159.39 -76.67,159.39 -76.687,159.39 -76.704,159.39 -76.721,159.39 -76.738,159.39 -76.755,159.39 -76.772,159.39 -76.789,159.39 -76.806,159.39 -76.823,159.39 -76.84,159.353 -76.84,159.316 -76.84,159.279 -76.84,159.242 -76.84,159.205 -76.84,159.168 -76.84,159.131 -76.84,159.094 -76.84,159.057 -76.84,159.02 -76.84,159.02 -76.823,159.02 -76.806,159.02 -76.789,159.02 -76.772,159.02 -76.755,159.02 -76.738,159.02 -76.721,159.02 -76.704,159.02 -76.687,159.02 -76.67))"], "date_created": "Fri, 03 Mar 2017 00:00:00 GMT", "description": "Low (7MHz) and high (20-100MHz) frequency ground-based ice-penetrating radar profiles collected on the Allan Hills blue ice region between January 19 and January 31, 2016. Data include .MAT files with low-frequency content; .DZX metadata, .DZT traces, and .KML tracklines with high-frequency content; and .PDF files with maps and figures.", "east": 159.39, "geometry": ["POINT(159.205 -76.755)"], "keywords": "Allan Hills; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Navigation; Radar", "locations": "Allan Hills; Antarctica", "north": -76.67, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Conway, Howard", "project_titles": "Collaborative Research: Allan HILLs Englacial Site (AHILLES) Selection", "projects": [{"proj_uid": "p0000385", "repository": "USAP-DC", "title": "Collaborative Research: Allan HILLs Englacial Site (AHILLES) Selection"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.84, "title": "Ground-based ice-penetrating radar profiles collected on the Allan Hills blue ice region", "uid": "601005", "west": 159.02}, {"awards": "1043761 Young, Duncan", "bounds_geometry": ["POLYGON((-156 -74.5,-151.4 -74.5,-146.8 -74.5,-142.2 -74.5,-137.6 -74.5,-133 -74.5,-128.4 -74.5,-123.8 -74.5,-119.2 -74.5,-114.6 -74.5,-110 -74.5,-110 -75.05,-110 -75.6,-110 -76.15,-110 -76.7,-110 -77.25,-110 -77.8,-110 -78.35,-110 -78.9,-110 -79.45,-110 -80,-114.6 -80,-119.2 -80,-123.8 -80,-128.4 -80,-133 -80,-137.6 -80,-142.2 -80,-146.8 -80,-151.4 -80,-156 -80,-156 -79.45,-156 -78.9,-156 -78.35,-156 -77.8,-156 -77.25,-156 -76.7,-156 -76.15,-156 -75.6,-156 -75.05,-156 -74.5))"], "date_created": "Mon, 20 Feb 2017 00:00:00 GMT", "description": "GIMBLE was proposed as the first systematic aerogeophysical investigation of the subglacial massif underlying central Marie Byrd Land. Aerogeophysically configured Baslers conducted 14 flights from Byrd Surface Camp and WAIS Divide Camp over two field seasons (January 2013 and December 2014). Airborne ice penetrating radar, gravity and magnetics were the primary datasets collected. Level 2 data represent geolocated geophysical properties (e.g ice thickness), derived from Level 1B measurements (e.g. radar echo delay). Dataset structures are based on those used for Operation Ice Bridge, and are line based data in ASCII space delimited .txt files, with a header delimited by leading \"#\" characters documenting column assignment and metadata. Georefering data is contained in .met files. GIMBLE.GMGEO2 contains line based data (in ASCII space delimited txt files) relating to magnetic anomaly. The raw data was obtained by a tail mounted Geometrics G-823A magnetometer. No heading correction, cross over correction, continuation or base correction have been applied. Data with significant geomagnetic activity (restricted to 07-Dec-2014 and 23-Dec-2014) were removed.", "east": -110.0, "geometry": ["POINT(-133 -77.25)"], "keywords": "Antarctica; Gimble; Glaciers/ice Sheet; Glaciers/Ice Sheet; Magnetic; Marie Byrd Land; Navigation; Potential Field; Solid Earth", "locations": "Marie Byrd Land; Antarctica", "north": -74.5, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Young, Duncan A.; Holt, John W.; Blankenship, Donald D.", "project_titles": "Geophysical Investigations of Marie Byrd Land Lithospheric Evolution (GIMBLE)", "projects": [{"proj_uid": "p0000435", "repository": "USAP-DC", "title": "Geophysical Investigations of Marie Byrd Land Lithospheric Evolution (GIMBLE)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.0, "title": "Magnetic anomaly data over central Marie Byrd Land, West Antarctica (GIMBLE.GMGEO2)", "uid": "601002", "west": -156.0}, {"awards": "1043761 Young, Duncan", "bounds_geometry": ["POLYGON((-156 -74.5,-151.4 -74.5,-146.8 -74.5,-142.2 -74.5,-137.6 -74.5,-133 -74.5,-128.4 -74.5,-123.8 -74.5,-119.2 -74.5,-114.6 -74.5,-110 -74.5,-110 -75.05,-110 -75.6,-110 -76.15,-110 -76.7,-110 -77.25,-110 -77.8,-110 -78.35,-110 -78.9,-110 -79.45,-110 -80,-114.6 -80,-119.2 -80,-123.8 -80,-128.4 -80,-133 -80,-137.6 -80,-142.2 -80,-146.8 -80,-151.4 -80,-156 -80,-156 -79.45,-156 -78.9,-156 -78.35,-156 -77.8,-156 -77.25,-156 -76.7,-156 -76.15,-156 -75.6,-156 -75.05,-156 -74.5))"], "date_created": "Mon, 20 Feb 2017 00:00:00 GMT", "description": "GIMBLE was proposed as the first systematic aerogeophysical investigation of the subglacial massif underlying central Marie Byrd Land. Aerogeophysically configured Baslers conducted 14 flights from Byrd Surface Camp and WAIS Divide Camp over two field seasons (January 2013 and December 2014). Airborne ice penetrating radar, gravity and magnetics were the primary datasets collected. Level 2 data represent geolocated geophysical properties (e.g ice thickness), derived from Level 1B measurements (e.g. radar echo delay). Dataset structures are based on those used for Operation Ice Bridge, and are line based data in ASCII space delimited .txt files, with a header delimited by leading \"#\" characters documenting column assignment and metadata. Georefering data is contained in .met files. GIMBLE.GGCMG2 contains line based data relating to gravity disturbance, processed from raw acceleration and position data by propriety software from Gravimetric Technologies and Novatel. The raw data was obtained a Canadian MicroGravity GT-1A gravimeter in ICP5, and a GT-2A gravimeter in ICP6. Data reduction was led by T. Richter.", "east": -110.0, "geometry": ["POINT(-133 -77.25)"], "keywords": "Antarctica; Gimble; Glaciers/ice Sheet; Glaciers/Ice Sheet; Gravity; Marie Byrd Land; Navigation; Potential Field; Solid Earth", "locations": "Marie Byrd Land; Antarctica", "north": -74.5, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Young, Duncan A.; Holt, John W.; Blankenship, Donald D.", "project_titles": "Geophysical Investigations of Marie Byrd Land Lithospheric Evolution (GIMBLE)", "projects": [{"proj_uid": "p0000435", "repository": "USAP-DC", "title": "Geophysical Investigations of Marie Byrd Land Lithospheric Evolution (GIMBLE)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.0, "title": "Gravity disturbance data over central Marie Byrd Land, West Antarctica (GIMBLE.GGCMG2)", "uid": "601003", "west": -156.0}, {"awards": "1043761 Young, Duncan", "bounds_geometry": ["POLYGON((-156 -74.5,-151.4 -74.5,-146.8 -74.5,-142.2 -74.5,-137.6 -74.5,-133 -74.5,-128.4 -74.5,-123.8 -74.5,-119.2 -74.5,-114.6 -74.5,-110 -74.5,-110 -75.05,-110 -75.6,-110 -76.15,-110 -76.7,-110 -77.25,-110 -77.8,-110 -78.35,-110 -78.9,-110 -79.45,-110 -80,-114.6 -80,-119.2 -80,-123.8 -80,-128.4 -80,-133 -80,-137.6 -80,-142.2 -80,-146.8 -80,-151.4 -80,-156 -80,-156 -79.45,-156 -78.9,-156 -78.35,-156 -77.8,-156 -77.25,-156 -76.7,-156 -76.15,-156 -75.6,-156 -75.05,-156 -74.5))"], "date_created": "Mon, 20 Feb 2017 00:00:00 GMT", "description": "GIMBLE was proposed as the first systematic aerogeophysical investigation of the subglacial massif underlying central Marie Byrd Land. Aerogeophysically configured Baslers conducted 14 flights from Byrd Surface Camp and WAIS Divide Camp over two field seasons (January 2013 and December 2014). Airborne ice penetrating radar, gravity and magnetics were the primary datasets collected. Level 2 data represent geolocated geophysical properties (e.g ice thickness), derived from Level 1B measurements (e.g. radar echo delay). Dataset structures are based on those used for Operation Ice Bridge, and are line based data in ASCII space delimited .txt files, with a header delimited by leading \"#\" characters documenting column assignment and metadata. Georefering data is contained in .met files. GIMBLE.GR2HI2 contains line based data (in ASCII space delimited txt files) relating to ice thickness, bed elevation and bed reflectivity, extracted from 1-D focused radargrams by semiautomatic interpretation. Data was acquired using HiCARS2 in ICP5, and MARFA in ICP6. Some data loss occurred in ICP6 (in particular F10,F11, and F14), limiting the lines that were focused. Data reduction was led by D. Young and S. Kempf.", "east": -110.0, "geometry": ["POINT(-133 -77.25)"], "keywords": "Airborne Radar; Antarctica; Gimble; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Thickness; Marie Byrd Land; Navigation; Radar", "locations": "Marie Byrd Land; Antarctica", "north": -74.5, "nsf_funding_programs": "Antarctic Earth Sciences", "persons": "Young, Duncan A.; Holt, John W.; Blankenship, Donald D.", "project_titles": "Geophysical Investigations of Marie Byrd Land Lithospheric Evolution (GIMBLE)", "projects": [{"proj_uid": "p0000435", "repository": "USAP-DC", "title": "Geophysical Investigations of Marie Byrd Land Lithospheric Evolution (GIMBLE)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.0, "title": "Ice thickness and related data over central Marie Byrd Land, West Antarctica (GIMBLE.GR2HI2)", "uid": "601001", "west": -156.0}, {"awards": "0424589 Gogineni, S. Prasad", "bounds_geometry": ["POLYGON((163.884 -76.567,171.5583 -76.567,179.2326 -76.567,186.9069 -76.567,194.5812 -76.567,202.2555 -76.567,209.9298 -76.567,217.6041 -76.567,225.2784 -76.567,232.9527 -76.567,240.627 -76.567,240.627 -77.3847,240.627 -78.2024,240.627 -79.0201,240.627 -79.8378,240.627 -80.6555,240.627 -81.4732,240.627 -82.2909,240.627 -83.1086,240.627 -83.9263,240.627 -84.744,232.9527 -84.744,225.2784 -84.744,217.6041 -84.744,209.9298 -84.744,202.2555 -84.744,194.5812 -84.744,186.9069 -84.744,179.2326 -84.744,171.5583 -84.744,163.884 -84.744,163.884 -83.9263,163.884 -83.1086,163.884 -82.2909,163.884 -81.4732,163.884 -80.6555,163.884 -79.8378,163.884 -79.0201,163.884 -78.2024,163.884 -77.3847,163.884 -76.567))"], "date_created": "Wed, 28 Dec 2016 00:00:00 GMT", "description": "The Center for Remote Sensing of Ice Sheets (CReSIS) participated in an airborne radar survey using a BT-67 Basler aircraft over the Siple Coast of Antarctica. Five personnel deployed from November 29, 2013 to January 18, 2014 with USAP project# I-189-M. The major objective was to collect fine-resolution radar data with an ultra-wideband MCoRDS4 UHF/VHF radar depth sounder in conjunction with data from two microwave (Ku-band and Snow) radars and a Google Camera. This dataset includes reflection profiles for the three radars and ice surface and ice bottom picks for the radar depth sounder.", "east": 240.627, "geometry": ["POINT(-157.7445 -80.6555)"], "keywords": "Airborne Radar; Antarctica; Basler; Glaciers/ice Sheet; Glaciers/Ice Sheet; Kamb Ice Stream; Radar; Siple Coast; Whillans Ice Stream", "locations": "Whillans Ice Stream; Kamb Ice Stream; Siple Coast; Antarctica", "north": -76.567, "nsf_funding_programs": null, "persons": "Paden, John; Hale, Richard", "project_titles": "Center for Remote Sensing of Ice Sheets (CReSIS)", "projects": [{"proj_uid": "p0000102", "repository": "USAP-DC", "title": "Center for Remote Sensing of Ice Sheets (CReSIS)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -84.744, "title": "Airborne radar profiles of the Whillans, Bindschadler, and Kamb Ice Streams", "uid": "600384", "west": 163.884}, {"awards": "1043649 Hock, Regine", "bounds_geometry": ["POINT(-61 -62.75)", "POINT(-57.5 -61.75)"], "date_created": "Wed, 17 Feb 2016 00:00:00 GMT", "description": "The data contain the time series totals of SAR derived detrended surface velocities from Livingston Island, as well as GeoTiff files generated from intensity tracking of Synthetic Aperture Radar (SAR) imagery. The images include average annual velocity and ice thickness of King George Island, and average annual velocity, ice thickness, and a digital elevation model of Livingston Island.", "east": -57.5, "geometry": ["POINT(-61 -62.75)", "POINT(-57.5 -61.75)"], "keywords": "Antarctica; Antarctic Peninsula; Digital Elevation Model; Geology/Geophysics - Other; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Thickness; Ice Velocity", "locations": "Antarctic Peninsula; Antarctica", "north": -61.75, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Osmanoglu, Batuhan; Hock, Regine", "project_titles": "Contribution of Western Antarctic Peninsula glaciers to sea level rise: Separation of the dynamic and climatic components", "projects": [{"proj_uid": "p0000054", "repository": "USAP-DC", "title": "Contribution of Western Antarctic Peninsula glaciers to sea level rise: Separation of the dynamic and climatic components"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -62.75, "title": "King George and Livingston Islands: Velocities and Digital Elevation Model", "uid": "609667", "west": -61.0}, {"awards": "1142162 Stone, John", "bounds_geometry": ["POLYGON((-104.14 -81.07,-102.24 -81.07,-100.34 -81.07,-98.44 -81.07,-96.54 -81.07,-94.64 -81.07,-92.74 -81.07,-90.84 -81.07,-88.94 -81.07,-87.04 -81.07,-85.14 -81.07,-85.14 -81.207,-85.14 -81.344,-85.14 -81.481,-85.14 -81.618,-85.14 -81.755,-85.14 -81.892,-85.14 -82.029,-85.14 -82.166,-85.14 -82.303,-85.14 -82.44,-87.04 -82.44,-88.94 -82.44,-90.84 -82.44,-92.74 -82.44,-94.64 -82.44,-96.54 -82.44,-98.44 -82.44,-100.34 -82.44,-102.24 -82.44,-104.14 -82.44,-104.14 -82.303,-104.14 -82.166,-104.14 -82.029,-104.14 -81.892,-104.14 -81.755,-104.14 -81.618,-104.14 -81.481,-104.14 -81.344,-104.14 -81.207,-104.14 -81.07))"], "date_created": "Fri, 01 Jan 2016 00:00:00 GMT", "description": "This award supports a reconnaissance geological and radar-sounding study of promising sites in West Antarctica for a future project to measure cosmogenic nuclides in subglacial bedrock. Field work will take place in the Whitmore Mountains, close to the WAIS divide, and on the Nash and Pirrit Hills, downflow from the divide in the Weddell Sea drainage. At each site geological indicators of higher (and lower) ice levels in the past will be mapped and evidence of subglacial erosion or its absence will be documented. Elevation transects of both glacial erratics and adjacent bedrock samples will be collected to establish the timing of recent deglaciation at the sites and provide a complement to similar measurements on material from depth transects obtained by future subglacial drilling. At each site, bedrock ridges will be traced into the subsurface with closely-spaced ice-penetrating radar surveys, using a combination of instruments and frequencies to obtain the highest possible surface detail. Collectively the results will define prospective sites for subglacial sampling, and maximize the potential information to be obtained from such samples in future studies. The intellectual merit of this project is that measurements of cosmogenic nuclides in subglacial bedrock hold promise for resolving the questions of whether the West Antarctic ice sheet collapsed completely in the past, whether it is prone to repeated large deglaciations, and if so, what is their magnitude and frequency. Such studies will require careful choice of targets, to locate sites where bedrock geology is favorable, cosmogenic nuclide records are likely to have been protected from subglacial erosion, and the local ice-surface response is indicative of large-scale ice sheet behavior. The broader impacts of this work include helping to determine whether subglacial surfaces in West Antarctica were ever exposed to cosmic rays, which will provide unambiguous evidence for or against a smaller ice sheet in the past. This is an important step towards establishing whether the WAIS is vulnerable to collapse in future, and will ultimately help to address uncertainty in forecasting sea level change. The results will also provide ground truth for models of ice-sheet dynamics and long-term ice sheet evolution, and will help researchers use these models to identify paleoclimate conditions responsible for WAIS deglaciation. The education and training of students (both undergraduate and graduate students) will play an important role in the project, which will involve Antarctic fieldwork, technically challenging labwork, data collection and interpretation, and communication of the outcome to scientists and the general public.", "east": -85.14, "geometry": ["POINT(-94.64 -81.755)"], "keywords": "Antarctica; Be-10; Chemistry:rock; Chemistry:Rock; Cosmogenic Dating; Glaciology; Nunataks; Sample/collection Description; Sample/Collection Description; Solid Earth; Whitmore Mountains", "locations": "Antarctica; Whitmore Mountains", "north": -81.07, "nsf_funding_programs": null, "persons": "Stone, John", "project_titles": "Glacial-interglacial History of West Antarctic Nunataks and Site Reconnaissance for Subglacial Bedrock Sampling", "projects": [{"proj_uid": "p0000335", "repository": "USAP-DC", "title": "Glacial-interglacial History of West Antarctic Nunataks and Site Reconnaissance for Subglacial Bedrock Sampling"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -82.44, "title": "Glacial-interglacial History of West Antarctic Nunataks and Site Reconnaissance for Subglacial Bedrock Sampling", "uid": "600162", "west": -104.14}, {"awards": "0944653 Forster, Richard", "bounds_geometry": ["POLYGON((-119.4 -78.1,-118.46 -78.1,-117.52 -78.1,-116.58 -78.1,-115.64 -78.1,-114.7 -78.1,-113.76 -78.1,-112.82 -78.1,-111.88 -78.1,-110.94 -78.1,-110 -78.1,-110 -78.29,-110 -78.48,-110 -78.67,-110 -78.86,-110 -79.05,-110 -79.24,-110 -79.43,-110 -79.62,-110 -79.81,-110 -80,-110.94 -80,-111.88 -80,-112.82 -80,-113.76 -80,-114.7 -80,-115.64 -80,-116.58 -80,-117.52 -80,-118.46 -80,-119.4 -80,-119.4 -79.81,-119.4 -79.62,-119.4 -79.43,-119.4 -79.24,-119.4 -79.05,-119.4 -78.86,-119.4 -78.67,-119.4 -78.48,-119.4 -78.29,-119.4 -78.1))"], "date_created": "Thu, 01 Jan 2015 00:00:00 GMT", "description": "This award supports a project to broaden the knowledge of annual accumulation patterns over the West Antarctic Ice Sheet by processing existing near-surface radar data taken on the US ITASE traverse in 2000 and by gathering and validating new ultra/super-high-frequency (UHF) radar images of near surface layers (to depths of ~15 m), expanding abilities to monitor recent annual accumulation patterns from point source ice cores to radar lines. Shallow (15 m) ice cores will be collected in conjunction with UHF radar images to confirm that radar echoed returns correspond with annual layers, and/or sub-annual density changes in the near-surface snow, as determined from ice core stable isotopes. This project will additionally improve accumulation monitoring from space-borne instruments by comparing the spatial-radar-derived-annual accumulation time series to the passive microwave time series dating back over 3 decades and covering most of Antarctica. The intellectual merit of this project is that mapping the spatial and temporal variations in accumulation rates over the Antarctic ice sheet is essential for understanding ice sheet responses to climate forcing. Antarctic precipitation rate is projected to increase up to 20% in the coming century from the predicted warming. Accumulation is a key component for determining ice sheet mass balance and, hence, sea level rise, yet our ability to measure annual accumulation variability over the past 5 decades (satellite era) is mostly limited to point-source ice cores. Developing a radar and ice core derived annual accumulation dataset will provide validation data for space-born remote sensing algorithms, climate models and, additionally, establish accumulation trends. The broader impacts of the project are that it will advance discovery and understanding within the climatology, glaciology and remote sensing communities by verifying the use of UHF radars to monitor annual layers as determined by visual, chemical and isotopic analysis from corresponding shallow ice cores and will provide a dataset of annual to near-annual accumulation measurements over the past ~5 decades across WAIS divide from existing radar data and proposed radar data. By determining if temporal changes in the passive microwave signal are correlated with temporal changes in accumulation will help assess the utility of passive microwave remote sensing to monitor accumulation rates over ice sheets for future decades. The project will promote teaching, training and learning, and increase representation of underrepresented groups by becoming involved in the NASA History of Winter project and Thermochron Mission and by providing K-12 teachers with training to monitor snow accumulation and temperature here in the US, linking polar research to the student\u0027s backyard. The project will train both undergraduate and graduate students in polar research and will encouraging young investigators to become involved in careers in science. In particular, two REU students will participate in original research projects as part of this larger project, from development of a hypothesis to presentation and publication of the results. The support of a new, young woman scientist will help to increase gender diversity in polar research.\n", "east": -110.0, "geometry": ["POINT(-114.7 -79.05)"], "keywords": "Airborne Radar; Antarctica; Geology/Geophysics - Other; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Radar; WAIS Divide; WAIS Divide Ice Core", "locations": "Antarctica; WAIS Divide", "north": -78.1, "nsf_funding_programs": null, "persons": "Forster, Richard", "project_titles": "Collaborative Research: Annual satellite era accumulation patterns over WAIS Divide: A study using shallow ice cores, near-surface radars and satellites", "projects": [{"proj_uid": "p0000079", "repository": "USAP-DC", "title": "Collaborative Research: Annual satellite era accumulation patterns over WAIS Divide: A study using shallow ice cores, near-surface radars and satellites"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -80.0, "title": "Annual Satellite Era Accumulation Patterns Over WAIS Divide: A Study Using Shallow Ice Cores, Near-Surface Radars and Satellites", "uid": "600146", "west": -119.4}, {"awards": "0636731 Bender, Michael", "bounds_geometry": ["POINT(160.35 -77.87)"], "date_created": "Wed, 26 Nov 2014 00:00:00 GMT", "description": "These data describe the analyses of the elemental and isotopic composition of O2, N2, and Ar and total air content made on the trapped air from three shallow ice cores (\u003c34m depth) collected during the 2009 field campaign to Mullins Valley of the Dry Valleys, Antarctica.", "east": 160.35, "geometry": ["POINT(160.35 -77.87)"], "keywords": "Antarctica; Chemistry:fluid; Chemistry:Fluid; Dry Valleys; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Isotope; Paleoclimate; Radar Interferometer", "locations": "Antarctica; Dry Valleys", "north": -77.87, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Bender, Michael; Yau, Audrey M.", "project_titles": "Collaborative Research: Dating and Paleoenvironmental Studies on Ancient Ice in the Dry Valleys, Antarctica", "projects": [{"proj_uid": "p0000039", "repository": "USAP-DC", "title": "Collaborative Research: Dating and Paleoenvironmental Studies on Ancient Ice in the Dry Valleys, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.87, "title": "Measurements of Trapped Air from Mullins Valley, Dry Valleys, Antarctica", "uid": "609597", "west": 160.35}, {"awards": "0838855 Jacobel, Robert; 0838854 Jacobel, Robert", "bounds_geometry": ["POLYGON((-164 -84.2,-163 -84.2,-162 -84.2,-161 -84.2,-160 -84.2,-159 -84.2,-158 -84.2,-157 -84.2,-156 -84.2,-155 -84.2,-154 -84.2,-154 -84.21,-154 -84.22,-154 -84.23,-154 -84.24,-154 -84.25,-154 -84.26,-154 -84.27,-154 -84.28,-154 -84.29,-154 -84.3,-155 -84.3,-156 -84.3,-157 -84.3,-158 -84.3,-159 -84.3,-160 -84.3,-161 -84.3,-162 -84.3,-163 -84.3,-164 -84.3,-164 -84.29,-164 -84.28,-164 -84.27,-164 -84.26,-164 -84.25,-164 -84.24,-164 -84.23,-164 -84.22,-164 -84.21,-164 -84.2))"], "date_created": "Thu, 30 Oct 2014 00:00:00 GMT", "description": "This data set includes ground-based, gridded, ice-penetrating radar thickness and basal reflection power, along with GPS coordinates, for two areas of Whillans Ice Stream: Subglacial Lake Whillans and the Whillans Ice Stream grounding zone.", "east": -154.0, "geometry": ["POINT(-159 -84.25)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; GPS; Radar; Whillans Ice Stream", "locations": "Antarctica; Whillans Ice Stream", "north": -84.2, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Jacobel, Robert", "project_titles": "Collaborative Research: Integrative Study of Marine Ice Sheet Stability \u0026 Subglacial Life Habitats in W Antarctica - Lake \u0026 Ice Stream Subglacial Access Research Drilling (LISSARD)", "projects": [{"proj_uid": "p0000105", "repository": "USAP-DC", "title": "Collaborative Research: Integrative Study of Marine Ice Sheet Stability \u0026 Subglacial Life Habitats in W Antarctica - Lake \u0026 Ice Stream Subglacial Access Research Drilling (LISSARD)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -84.3, "title": "Radar Studies of Subglacial Lake Whillans and the Whillans Ice Stream Grounding Zone", "uid": "609594", "west": -164.0}, {"awards": "1045215 Gooseff, Michael", "bounds_geometry": ["POLYGON((160 -77.25,160.5 -77.25,161 -77.25,161.5 -77.25,162 -77.25,162.5 -77.25,163 -77.25,163.5 -77.25,164 -77.25,164.5 -77.25,165 -77.25,165 -77.375,165 -77.5,165 -77.625,165 -77.75,165 -77.875,165 -78,165 -78.125,165 -78.25,165 -78.375,165 -78.5,164.5 -78.5,164 -78.5,163.5 -78.5,163 -78.5,162.5 -78.5,162 -78.5,161.5 -78.5,161 -78.5,160.5 -78.5,160 -78.5,160 -78.375,160 -78.25,160 -78.125,160 -78,160 -77.875,160 -77.75,160 -77.625,160 -77.5,160 -77.375,160 -77.25))"], "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "Intellectual Merit: Until recently, wetted soils in the Dry Valleys were generally only found adjacent to streams and lakes. Since the warm austral summer of 2002, numerous \"wet spots\" have been observed far from shorelines on relatively flat valley floor locations and as downslope fingers of flow on valley walls. The source of the water to wet these soils is unclear, as is the spatial and temporal pattern of occurrence from year to year. Their significance is potentially great as enhanced soil moisture may change the thermodynamics, hydrology, and erosion rate of surface soils, and facilitate transport of materials that had previously been stable. These changes to the soil active layer could significantly modify permafrost and ground ice stability within the Dry Valleys. The PIs seek to investigate these changes to address two competing hypotheses: that the source of water to these ?wet spots? is ground ice melt and that the source of this water is snowmelt. The PIs will document the spatiotemporal dynamics of these wet areas using high frequency remote sensing data from QuickBird and WorldView satellites to document the occurrence, dimensions, and growth of wet spots during the 2010-\u00ad11 and 2011-\u00ad12 austral summers. They will test their hypotheses by determining whether wet spots recur in the same locations in each season, and they will compare present to past distribution using archived imagery. They will also determine whether spatial snow accumulation patterns and temporal ablation patterns are coincident with wet spot formation. Broader impacts: One graduate student will be trained on this project. Findings will be reported at scientific meetings and published in peer reviewed journals. They will also develop a teaching module on remote sensing applications to hydrology for the Modular Curriculum for Hydrologic Advancement and an innovative prototype project designed to leverage public participation in mapping wet spots and snow patches across the Dry Valleys through the use of social media and mobile computing applications.\n", "east": 165.0, "geometry": ["POINT(162.5 -77.875)"], "keywords": "Antarctica; Climate; Critical Zone; Dry Valleys; Radar; Soil Moisture", "locations": "Antarctica; Dry Valleys", "north": -77.25, "nsf_funding_programs": null, "persons": "Gooseff, Michael N.", "project_titles": "EAGER: Are the Dry Valleys Getting Wetter? A Preliminary Assessment of Wetness Across the McMurdo Dry Valleys Landscape", "projects": [{"proj_uid": "p0000471", "repository": "USAP-DC", "title": "EAGER: Are the Dry Valleys Getting Wetter? A Preliminary Assessment of Wetness Across the McMurdo Dry Valleys Landscape"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.5, "title": "Are the Dry Valleys Getting Wetter? A Preliminary Assessment of Wetness Across the McMurdo Dry Valleys Landscape", "uid": "600131", "west": 160.0}, {"awards": "0732804 McPhee, Miles", "bounds_geometry": ["POINT(166.25 -77.42)"], "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "The Office of Polar Programs, Antarctic Integrated and System Science Program has made this award to support an interdisciplinary study of the effects of the ocean on the stability of glacial ice in the most dynamic region the West Antarctic Ice Sheet, namely the Pine Island Glacier in the Amundsen Sea Embayment. The collaborative project builds on the knowledge gained by the highly successful West Antarctic Ice Sheet program and is being jointly sponsored with NASA. Recent observations indicate a significant ice loss, equivalent to 10% of the ongoing increase in sea-level rise, in this region. These changes are largest along the coast and propagate rapidly inland, indicating the critical impact of the ocean on ice sheet stability in the region. While a broad range of remote sensing and ground-based instrumentation is available to characterize changes of the ice surface and internal structure (deformation, ice motion, melt) and the shape of the underlying sediment and rock bed, instrumentation has yet to be successfully deployed for observing boundary layer processes of the ocean cavity which underlies the floating ice shelf and where rapid melting is apparently occurring. Innovative, mini ocean sensors that can be lowered through boreholes in the ice shelf (about 500 m thick) will be developed and deployed to automatically provide ocean profiling information over at least three years. Their data will be transmitted through a conducting cable frozen in the borehole to the surface where it will be further transmitted via satellite to a laboratory in the US. Geophysical and remote sensing methods (seismic, GPS, altimetry, stereo imaging, radar profiling) will be applied to map the geometry of the ice shelf, the shape of the sub ice-shelf cavity, the ice surface geometry and deformations within the glacial ice. To integrate the seismic, glaciological and oceanographic observations, a new 3-dimensional coupled ice-ocean model is being developed which will be the first of its kind. NASA is supporting satellite based research and the deployment of a robotic-camera system to explore the environment in the ocean cavity underlying the ice shelf and NSF is supporting all other aspects of this study. \n\nBroader impacts: This project is motivated by the potential societal impacts of rapid sea level rise and should result in critically needed improvements in characterizing and predicting the behavior of coupled ocean-ice systems. It is a contribution to the International Polar Year and was endorsed by the International Council for Science as a component of the \u0027Multidisciplinary Study of the Amundsen Sea Embayment\u0027 proposal #258 of the honeycomb of endorsed IPY activities. The research involves substantial international partnerships with the British Antarctic Survey and the University of Bristol in the UK. The investigators will partner with the previously funded \u0027Polar Palooza\u0027 education and outreach program in addition to undertaking a diverse set of outreach activities of their own. Eight graduate students and one undergraduate as well as one post doc will be integrated into this research project.\n", "east": 166.25, "geometry": ["POINT(166.25 -77.42)"], "keywords": "Antarctica; Atmosphere; McMurdo; Meteorology; Oceans; Ross Island; Southern Ocean", "locations": "Ross Island; Antarctica; McMurdo; Southern Ocean", "north": -77.42, "nsf_funding_programs": null, "persons": "McPhee, Miles G.", "project_titles": "Collaborative Research; IPY: Ocean-Ice Interaction in the Amundsen Sea sector of West Antarctica", "projects": [{"proj_uid": "p0000043", "repository": "USAP-DC", "title": "Collaborative Research; IPY: Ocean-Ice Interaction in the Amundsen Sea sector of West Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.42, "title": "Ocean-Ice Interaction in the Amundsen Sea Sector of West Antarctica", "uid": "600072", "west": 166.25}, {"awards": "0636724 Blankenship, Donald", "bounds_geometry": ["POLYGON((-120 -75,-117 -75,-114 -75,-111 -75,-108 -75,-105 -75,-102 -75,-99 -75,-96 -75,-93 -75,-90 -75,-90 -75.5,-90 -76,-90 -76.5,-90 -77,-90 -77.5,-90 -78,-90 -78.5,-90 -79,-90 -79.5,-90 -80,-93 -80,-96 -80,-99 -80,-102 -80,-105 -80,-108 -80,-111 -80,-114 -80,-117 -80,-120 -80,-120 -79.5,-120 -79,-120 -78.5,-120 -78,-120 -77.5,-120 -77,-120 -76.5,-120 -76,-120 -75.5,-120 -75))"], "date_created": "Mon, 21 May 2012 00:00:00 GMT", "description": "This data set contains subglacial water flow paths beneath Thwaites Glacier, West Antarctica, interpreted from ice thickness and bed elevation measurements collected between 7 December 2004 and 31 January 2005 by the Airborne Geophysical Survey of the Amundsen Embayment (AGASEA) expedition. Data consist of an ASCII text file with geographical coordinates, hydraulic head, and bed and surface elevations, and a corresponding .pdf map.\n\nData are available via FTP.", "east": -90.0, "geometry": ["POINT(-105 -77.5)"], "keywords": "AGASEA; Airborne Radar; Antarctica; Elevation; Flow Paths; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Thwaites Glacier", "locations": "Antarctica; Thwaites Glacier", "north": -75.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Carter, Sasha P.; Young, Duncan A.; Blankenship, Donald D.", "project_titles": "Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System", "projects": [{"proj_uid": "p0000174", "repository": "USAP-DC", "title": "Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.0, "title": "Subglacial water flow paths under Thwaites Glacier, West Antarctica", "uid": "609518", "west": -120.0}, {"awards": "0636724 Blankenship, Donald", "bounds_geometry": ["POLYGON((-125 -73,-121.5 -73,-118 -73,-114.5 -73,-111 -73,-107.5 -73,-104 -73,-100.5 -73,-97 -73,-93.5 -73,-90 -73,-90 -74,-90 -75,-90 -76,-90 -77,-90 -78,-90 -79,-90 -80,-90 -81,-90 -82,-90 -83,-93.5 -83,-97 -83,-100.5 -83,-104 -83,-107.5 -83,-111 -83,-114.5 -83,-118 -83,-121.5 -83,-125 -83,-125 -82,-125 -81,-125 -80,-125 -79,-125 -78,-125 -77,-125 -76,-125 -75,-125 -74,-125 -73))"], "date_created": "Thu, 03 May 2012 00:00:00 GMT", "description": "This data set contains line-based radar-derived ice thickness and bed elevation data, collected as part of the Airborne Geophysical Survey of the Amundsen Embayment (AGASEA) expedition, which took place over Thwaites Glacier in West Antarctica from 2004 to 2005. The data set includes ice thickness, ice sheet bed elevation, and ice sheet surface elevation, derived from ice-penetrating radar and aircraft GPS positions. The data are spaced on a 15 km by 15 km grid over the entire catchment of the glacier, and sampled at approximately 15 meters along track. Most of the radar data used for this dataset has been processed using a 1-D focusing algorithm, to reduce the along track resolution to tens of meters, to improve boundary conditions for ice sheet models. \n\nData are available via FTP in space-delimited ASCII format.", "east": -90.0, "geometry": ["POINT(-107.5 -78)"], "keywords": "AGASEA; Airborne Radar; Amundsen Sea; Antarctica; Elevation; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Thickness", "locations": "Amundsen Sea; Antarctica", "north": -73.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Blankenship, Donald D.; Young, Duncan A.; Holt, John W.; Kempf, Scott D.", "project_titles": "Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System", "projects": [{"proj_uid": "p0000174", "repository": "USAP-DC", "title": "Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -83.0, "title": "AGASEA Ice Thickness Profile Data from the Amundsen Sea Embayment, Antarctica", "uid": "609517", "west": -125.0}, {"awards": "0440847 Raymond, Charles", "bounds_geometry": ["POLYGON((-115.457 -78.7489,-114.8241 -78.7489,-114.1912 -78.7489,-113.5583 -78.7489,-112.9254 -78.7489,-112.2925 -78.7489,-111.6596 -78.7489,-111.0267 -78.7489,-110.3938 -78.7489,-109.7609 -78.7489,-109.128 -78.7489,-109.128 -78.83802,-109.128 -78.92714,-109.128 -79.01626,-109.128 -79.10538,-109.128 -79.1945,-109.128 -79.28362,-109.128 -79.37274,-109.128 -79.46186,-109.128 -79.55098,-109.128 -79.6401,-109.7609 -79.6401,-110.3938 -79.6401,-111.0267 -79.6401,-111.6596 -79.6401,-112.2925 -79.6401,-112.9254 -79.6401,-113.5583 -79.6401,-114.1912 -79.6401,-114.8241 -79.6401,-115.457 -79.6401,-115.457 -79.55098,-115.457 -79.46186,-115.457 -79.37274,-115.457 -79.28362,-115.457 -79.1945,-115.457 -79.10538,-115.457 -79.01626,-115.457 -78.92714,-115.457 -78.83802,-115.457 -78.7489))"], "date_created": "Thu, 01 Sep 2011 00:00:00 GMT", "description": "This data set includes ice flow velocities and strain configurations, from GPS measurements on the West Antarctic Ice Sheet (WAIS) Divide. Ninety markers installed in the firn were measured during two consecutive field seasons running from 2005-2006 and 2006-2007. The markers were located in 150 by 60 km area, with smaller clusters of five markers located within about 10 km of each other. Consecutive GPS measurements were used to derive velocity for each marker. Strain configurations were estimated by differentiating a linear fit of the data at each marker cluster. \n\nData are available via FTP as ASCII text (.txt ) files in comma separated value format.", "east": -109.128, "geometry": ["POINT(-112.2925 -79.1945)"], "keywords": "Antarctica; Geology/Geophysics - Other; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPS; Ice Flow Velocity; Ross-Amundsen Divide; Strain", "locations": "Antarctica; Ross-Amundsen Divide", "north": -78.7489, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Matsuoka, Kenichi; Power, Donovan; Rasmussen, Al", "project_titles": "Detection of Crystal Orientation Fabrics near the Ross/Amundsen Sea Ice-flow Divide and at the Siple Dome Ice Core Site using Polarimetric Radar Methods", "projects": [{"proj_uid": "p0000024", "repository": "USAP-DC", "title": "Detection of Crystal Orientation Fabrics near the Ross/Amundsen Sea Ice-flow Divide and at the Siple Dome Ice Core Site using Polarimetric Radar Methods"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.6401, "title": "GPS-Measured Ice Velocities and Strain Data from the Ross and Amundsen Sea Ice Flow Divide, West Antarctica", "uid": "609503", "west": -115.457}, {"awards": "0440847 Raymond, Charles", "bounds_geometry": ["POLYGON((-115.457 -78.7489,-114.8241 -78.7489,-114.1912 -78.7489,-113.5583 -78.7489,-112.9254 -78.7489,-112.2925 -78.7489,-111.6596 -78.7489,-111.0267 -78.7489,-110.3938 -78.7489,-109.7609 -78.7489,-109.128 -78.7489,-109.128 -78.83802,-109.128 -78.92714,-109.128 -79.01626,-109.128 -79.10538,-109.128 -79.1945,-109.128 -79.28362,-109.128 -79.37274,-109.128 -79.46186,-109.128 -79.55098,-109.128 -79.6401,-109.7609 -79.6401,-110.3938 -79.6401,-111.0267 -79.6401,-111.6596 -79.6401,-112.2925 -79.6401,-112.9254 -79.6401,-113.5583 -79.6401,-114.1912 -79.6401,-114.8241 -79.6401,-115.457 -79.6401,-115.457 -79.55098,-115.457 -79.46186,-115.457 -79.37274,-115.457 -79.28362,-115.457 -79.1945,-115.457 -79.10538,-115.457 -79.01626,-115.457 -78.92714,-115.457 -78.83802,-115.457 -78.7489))"], "date_created": "Tue, 30 Aug 2011 00:00:00 GMT", "description": "This dataset contains ground-based, co-polarized radar data collected using pulse-modulated 60 MHz and 179 MHz radar at 19 sites around a deep ice coring site near the Ross and Amundsen flow divide of West Antarctic Ice Sheet (WAIS Divide). At each site, the radar data were collected at 12 orientations of the radar polarization plane for three radar pulse widths: 250 nsec, 500 nsec, and 1000 nsec. Useful signals were received from depths roughly between 200 m and 2000 m. Ice flow velocities and strain configurations were measured at most of these radar survey sites, and these ice motion data are also provided at NSIDC (GPS-Measured Ice Velocities and Strain Data from the Ross and Amundsen Sea Ice Flow Divide, West Antarctica).\n\nData are available via FTP in MATLAB (.mat) format.", "east": -109.128, "geometry": ["POINT(-112.2925 -79.1945)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Radar; Ross-Amundsen Divide", "locations": "Antarctica; Ross-Amundsen Divide", "north": -78.7489, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Matsuoka, Kenichi; Power, Donovan; Fujita, Shuji; Raymond, Charles", "project_titles": "Detection of Crystal Orientation Fabrics near the Ross/Amundsen Sea Ice-flow Divide and at the Siple Dome Ice Core Site using Polarimetric Radar Methods", "projects": [{"proj_uid": "p0000024", "repository": "USAP-DC", "title": "Detection of Crystal Orientation Fabrics near the Ross/Amundsen Sea Ice-flow Divide and at the Siple Dome Ice Core Site using Polarimetric Radar Methods"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.6401, "title": "Polarimetric Radar Data from the Ross and Amundsen Sea Ice Flow Divide, West Antarctica", "uid": "609496", "west": -115.457}, {"awards": "0538674 Winebrenner, Dale", "bounds_geometry": ["POINT(73.17 -78.47)"], "date_created": "Mon, 15 Aug 2011 00:00:00 GMT", "description": "This data set provides a modeled radar attenuation rate profile, showing the predicted contributions from pure ice and impurities to radar attenuation at the Vostok 5G ice core site in Antarctica, as well as the total attenuation rate and its formal uncertainty. The model data are based on borehole temperature logs, concentrations of major soluble ions measured from melted ice core samples, and information about the electrical conductivity of ice. Attenuation rates and their spatial variability are important constraints for radar studies of ice sheets. Parameters include depth, total attenuation rate, and attenuation rate contribution from pure ice, acidity, and salinity.\n\nData are available via FTP as a text file (.txt) with columns in comma separated value format.", "east": 73.17, "geometry": ["POINT(73.17 -78.47)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Lake Vostok; Radar Attenuation Rate; Vostok Ice Core", "locations": "Lake Vostok; Antarctica", "north": -78.47, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Macgregor, Joseph A.; Matsuoka, Kenichi; Studinger, Michael S.", "project_titles": "Collaborative Research: Deciphering the Deep Ice and the Ice-water Interface over Lake Vostok Using Existing Radar Data", "projects": [{"proj_uid": "p0000090", "repository": "USAP-DC", "title": "Collaborative Research: Deciphering the Deep Ice and the Ice-water Interface over Lake Vostok Using Existing Radar Data"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -78.47, "title": "Modeled Radar Attenuation Rate Profile at the Vostok 5G Ice Core Site, Antarctica", "uid": "609501", "west": 73.17}, {"awards": "0538674 Winebrenner, Dale", "bounds_geometry": ["POLYGON((68.4 -75.7,69.61 -75.7,70.82 -75.7,72.03 -75.7,73.24 -75.7,74.45 -75.7,75.66 -75.7,76.87 -75.7,78.08 -75.7,79.29 -75.7,80.5 -75.7,80.5 -76.04,80.5 -76.38,80.5 -76.72,80.5 -77.06,80.5 -77.4,80.5 -77.74,80.5 -78.08,80.5 -78.42,80.5 -78.76,80.5 -79.1,79.29 -79.1,78.08 -79.1,76.87 -79.1,75.66 -79.1,74.45 -79.1,73.24 -79.1,72.03 -79.1,70.82 -79.1,69.61 -79.1,68.4 -79.1,68.4 -78.76,68.4 -78.42,68.4 -78.08,68.4 -77.74,68.4 -77.4,68.4 -77.06,68.4 -76.72,68.4 -76.38,68.4 -76.04,68.4 -75.7))"], "date_created": "Mon, 01 Aug 2011 00:00:00 GMT", "description": "This data set consists of inferred accumulation rates from three radar layers (26, 35 and 41 thousand years old) in the Vostok Subglacial Lake region. Accumulation rates were inferred using Local-Layer Approximation (LLA), which assumes that the strain-rate history of a particle traveling through the ice sheet can be approximated by the vertical strain-rate profile at the current position of the particle, which the researchers assume to be uniform. Parameters include location, in latitude and longitude, polar stereographic coordinates, and local grid X and Y coordinates, along with layer age, in thousands of years (ka), and inferred accumulation rate (cm/a). The data cover a 150 by 350 km area.\n\nData are available via FTP, as a text file (.txt) with columns in comma separated value format.", "east": 80.5, "geometry": ["POINT(74.45 -77.4)"], "keywords": "Accumulation Rate; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Lake Vostok", "locations": "Antarctica; Lake Vostok", "north": -75.7, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Macgregor, Joseph A.; Matsuoka, Kenichi; Studinger, Michael S.; Waddington, Edwin D.; Winebrenner, Dale", "project_titles": "Collaborative Research: Deciphering the Deep Ice and the Ice-water Interface over Lake Vostok Using Existing Radar Data", "projects": [{"proj_uid": "p0000090", "repository": "USAP-DC", "title": "Collaborative Research: Deciphering the Deep Ice and the Ice-water Interface over Lake Vostok Using Existing Radar Data"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.1, "title": "Millennially Averaged Accumulation Rates for Lake Vostok", "uid": "609500", "west": 68.4}, {"awards": "0839084 Ortland, David", "bounds_geometry": ["POLYGON((-63 -59,-62 -59,-61 -59,-60 -59,-59 -59,-58 -59,-57 -59,-56 -59,-55 -59,-54 -59,-53 -59,-53 -59.6,-53 -60.2,-53 -60.8,-53 -61.4,-53 -62,-53 -62.6,-53 -63.2,-53 -63.8,-53 -64.4,-53 -65,-54 -65,-55 -65,-56 -65,-57 -65,-58 -65,-59 -65,-60 -65,-61 -65,-62 -65,-63 -65,-63 -64.4,-63 -63.8,-63 -63.2,-63 -62.6,-63 -62,-63 -61.4,-63 -60.8,-63 -60.2,-63 -59.6,-63 -59))"], "date_created": "Sat, 01 Jan 2011 00:00:00 GMT", "description": "The project will employ a sophisticated meteor radar at the Brazilian Antarctic station Comandante Ferraz on King George Island for a number of synergetic research efforts of high interest to the international aeronomical community. The location of the radar will be at the tip of the Antarctic Peninsula - at a critical southern latitude of 62 degrees - to fill a current measurement gap from 54 to 68 degrees south. The radar will play a key role in Antarctic and inter-hemispheric studies of neutral atmosphere dynamics, defining global mesosphere and lower thermosphere structure and variability (from 80 to 105 km) and guiding advances of models accounting for the dynamics of this high-altitude region, including general circulation models, and climate and numerical weather prediction models. The unique radar measurement sensitivity will enable studies of: (1) the large-scale circulation and planetary waves, (2) the tidal structure and variability, (3) the momentum transport by small-scale gravity waves, (4) important, but unquantified, gravity wave - tidal interactions, (5) polar mesosphere summer echoes, and (6) meteor fluxes, head echoes, and non-specular trails, a number of which exhibit high latitudinal gradients at these latitudes. This radar will support extensive collaborations with U.S. and other scientists making measurements at other Antarctic and Arctic conjugate sites, including Brazilian scientists at C. Ferraz and U.S. and international colleagues having other instrumentation in the Antarctic, Arctic, and within South America. Links to the University of Colorado in the U.S., Instituto Nacional de Pesquisas Espaciais (INPE) in Brazil and Universidad Nacional de La Plata in Argentina will provide unique research opportunities for graduate and undergraduate students in the U.S. and South America.", "east": -53.0, "geometry": ["POINT(-58 -62)"], "keywords": "Antarctica; Atmosphere; Meteorology; Meteor Radar", "locations": "Antarctica", "north": -59.0, "nsf_funding_programs": null, "persons": "Fritts, David; Janches, Diego", "project_titles": "Large- and Small-scale Dynamics and Meteor Studies in the MLT with a New-generation Meteor Radar on King George Island", "projects": [{"proj_uid": "p0000670", "repository": "USAP-DC", "title": "Large- and Small-scale Dynamics and Meteor Studies in the MLT with a New-generation Meteor Radar on King George Island"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -65.0, "title": "Large- and Small-scale Dynamics and Meteor Studies in the MLT with a New-generation Meteor Radar on King George Island", "uid": "600107", "west": -63.0}, {"awards": "0337567 Jacobel, Robert", "bounds_geometry": ["POLYGON((130 -78,133 -78,136 -78,139 -78,142 -78,145 -78,148 -78,151 -78,154 -78,157 -78,160 -78,160 -79.2,160 -80.4,160 -81.6,160 -82.8,160 -84,160 -85.2,160 -86.4,160 -87.6,160 -88.8,160 -90,157 -90,154 -90,151 -90,148 -90,145 -90,142 -90,139 -90,136 -90,133 -90,130 -90,130 -88.8,130 -87.6,130 -86.4,130 -85.2,130 -84,130 -82.8,130 -81.6,130 -80.4,130 -79.2,130 -78))"], "date_created": "Wed, 20 Oct 2010 00:00:00 GMT", "description": "This data set contains ice penetrating radar data from the US-International Trans-Antarctic Science Expedition (ITASE) Traverse, from Taylor Dome to South Pole recorded by the St. Olaf College deep radar system. Parameters include latitude, longitude, distance along profile (m), ice thickness pick (m), surface elevation (m), and bed echo power (relative units) from the approximately 1800 km traverse recorded during the 2006-2007 and 2007-2008 Antarctic field seasons (austral summer). The traverse has been broken into three segments, which are shown on three maps provided with the data. A sample radar profile covering approximately 120 km of the traverse near Titan Dome is also provided.\n\nData are available via FTP as ASCII text files (.txt). Profile location maps and sample profile sections are available as Joint Photographic Experts Group (.jpg) image files.", "east": 160.0, "geometry": ["POINT(145 -84)"], "keywords": "Antarctica; Elevation; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Thickness; ITASE; South Pole; Taylor Dome", "locations": "Taylor Dome; South Pole; Antarctica", "north": -78.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Jacobel, Robert", "project_titles": "Collaborative Research: Is Ice Stream C Restarting? Glaciological Investigations of the \u0027Bulge\u0027 and the Trunk of Ice Stream C, West Antartica", "projects": [{"proj_uid": "p0000192", "repository": "USAP-DC", "title": "Collaborative Research: Is Ice Stream C Restarting? Glaciological Investigations of the \u0027Bulge\u0027 and the Trunk of Ice Stream C, West Antartica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "ITASE", "south": -90.0, "title": "Radar Studies of Internal Stratigraphy and Bed Topography along the US ITASE-II Traverse", "uid": "609475", "west": 130.0}, {"awards": "0440666 Waddington, Edwin", "bounds_geometry": ["POINT(-111.816667 -79.416667)", "POINT(158.716667 -77.783333)"], "date_created": "Sun, 20 Jun 2010 00:00:00 GMT", "description": "This data set contains radar internal layer and ice sheet topography data for two sites in Antarctica, along with associated model results from two studies. This project used geophysical inverse theory and a 2.5 D flowband ice-flow forward model to extract robust transient accumulation patterns from multiple deeper layers. Histories of divide migration, or the movement of the ice sheet and ice-surface evolution are also provided. The data used to solve the inverse problem, and the model solutions are provided. Internal layers, modern ice-surface velocities, and modern ice-sheet geometry at Taylor Mouth are available, as well as the pattern of accumulation inferred by Waddington et al. (2007).\n\nData are available via FTP in Matlab (.mat) format. Supporting information is available as text files (.rtf and .txt).", "east": 158.716667, "geometry": ["POINT(-111.816667 -79.416667)", "POINT(158.716667 -77.783333)"], "keywords": "Antarctica; Elevation; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; WAIS Divide; WAIS Divide Ice Core", "locations": "Antarctica; WAIS Divide", "north": -77.783333, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Waddington, Edwin D.; Koutnik, Michelle", "project_titles": "Histories of accumulation, thickness and WAIS Divide location from radar layers using a new inverse approach", "projects": [{"proj_uid": "p0000018", "repository": "USAP-DC", "title": "Histories of accumulation, thickness and WAIS Divide location from radar layers using a new inverse approach"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.416667, "title": "Histories of Accumulation, Thickness, and WAIS Divide Location, Antarctica", "uid": "609473", "west": -111.816667}, {"awards": "0338151 Raymond, Charles", "bounds_geometry": ["POINT(-112.09 -79.47)"], "date_created": "Tue, 15 Jun 2010 00:00:00 GMT", "description": "This data set contains the results of a model study of spatial variations of ice temperature and subglacial conditions using available ice-penetrating radar data around a future deep ice coring site near the Ross and Amundsen flow divide of West Antarctic Ice Sheet. The model data are based on radar data collected by the Support Office of Aerogeophysical Research (SOAR) at the University of Texas, and the University of Washington, in 2000. The data include values for attenuation estimates for individual radar profiles.\n\nData are available via FTP in MATLAB (.mat) and Portable Document (.pdf) formats.", "east": -112.09, "geometry": ["POINT(-112.09 -79.47)"], "keywords": "Airborne Radar; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Radar; WAIS Divide", "locations": "WAIS Divide; Antarctica", "north": -79.47, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Raymond, Charles; Matsuoka, Kenichi", "project_titles": "Glaciological Characteristics of the Ross/Amundsen Sea Ice-flow Divide Deduced by a New Analysis of Ice-penetrating Radar Data", "projects": [{"proj_uid": "p0000017", "repository": "USAP-DC", "title": "Glaciological Characteristics of the Ross/Amundsen Sea Ice-flow Divide Deduced by a New Analysis of Ice-penetrating Radar Data"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "WAIS Divide Ice Core", "south": -79.47, "title": "Englacial Layers and Attenuation Rates across the Ross and Amundsen Sea Ice-Flow Divide (WAIS Divide), West Antarctica", "uid": "609470", "west": -112.09}, {"awards": "0739372 Conway, Howard", "bounds_geometry": ["POLYGON((-123 -76,-120.65 -76,-118.3 -76,-115.95 -76,-113.6 -76,-111.25 -76,-108.9 -76,-106.55 -76,-104.2 -76,-101.85 -76,-99.5 -76,-99.5 -76.37,-99.5 -76.74,-99.5 -77.11,-99.5 -77.48,-99.5 -77.85,-99.5 -78.22,-99.5 -78.59,-99.5 -78.96,-99.5 -79.33,-99.5 -79.7,-101.85 -79.7,-104.2 -79.7,-106.55 -79.7,-108.9 -79.7,-111.25 -79.7,-113.6 -79.7,-115.95 -79.7,-118.3 -79.7,-120.65 -79.7,-123 -79.7,-123 -79.33,-123 -78.96,-123 -78.59,-123 -78.22,-123 -77.85,-123 -77.48,-123 -77.11,-123 -76.74,-123 -76.37,-123 -76))"], "date_created": "Sat, 01 May 2010 00:00:00 GMT", "description": "This data set contains past flow lines of Thwaites Glacier. The flow lines were identified using layer patterns tracked between parallel radar layers, from a radar profile of the Thwaites Glacier catchment. The radar data was run and processed by the University of Texas Institute for Geophysics. The flow lines were identified from distinct layer patterns tracked between parallel radar layers. \n\nData are available via FTP in ASCII text (.txt) format.", "east": -99.5, "geometry": ["POINT(-111.25 -77.85)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Flow Lines; Thwaites Glacier", "locations": "Thwaites Glacier; Antarctica", "north": -76.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Conway, Howard; Fudge, T. J.; Catania, Ginny", "project_titles": "Collaborative Research: Ice-flow history of the Thwaites Glacier, West Antarctica", "projects": [{"proj_uid": "p0000143", "repository": "USAP-DC", "title": "Collaborative Research: Ice-flow history of the Thwaites Glacier, West Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.7, "title": "Ice Flow History of the Thwaites Glacier, West Antarctica", "uid": "609463", "west": -123.0}, {"awards": "0538120 Catania, Ginny", "bounds_geometry": ["POLYGON((-160 -81,-158.5 -81,-157 -81,-155.5 -81,-154 -81,-152.5 -81,-151 -81,-149.5 -81,-148 -81,-146.5 -81,-145 -81,-145 -81.2,-145 -81.4,-145 -81.6,-145 -81.8,-145 -82,-145 -82.2,-145 -82.4,-145 -82.6,-145 -82.8,-145 -83,-146.5 -83,-148 -83,-149.5 -83,-151 -83,-152.5 -83,-154 -83,-155.5 -83,-157 -83,-158.5 -83,-160 -83,-160 -82.8,-160 -82.6,-160 -82.4,-160 -82.2,-160 -82,-160 -81.8,-160 -81.6,-160 -81.4,-160 -81.2,-160 -81))"], "date_created": "Fri, 01 Jan 2010 00:00:00 GMT", "description": "These data consist of ice-penetrating radar data collected on the ground across the grounding line near Siple Dome during the 2006 and 2007 Antarctic summer field seasons. Primarily, the data consist of low-frequency radar data (2 MHz, approximately 50 meter resolution) in order to observe deep internal layers and the ice-bed interface. The data set also contains one file with high-frequency (100 MHz, approximately 1 meter resolution) radar data, for a sub-region of one of the low-frequency radar profiles. Coincident kinematic GPS data were also collected to correct the radar data for topography along each profile. Radar profiles are typically approximately 20 km in length with the grounding line crossed centrally where possible. \n\nData are available via FTP in Matlab (.mat) format.", "east": -145.0, "geometry": ["POINT(-152.5 -82)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; GPR; Grounding Line; Radar; Siple Coast", "locations": "Siple Coast; Antarctica", "north": -81.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Hulbe, Christina; Catania, Ginny", "project_titles": "Collaborative Research: Grounding Line Forensics: The History of Grounding Line Retreat in the Kamb Ice Stream Outlet Region", "projects": [{"proj_uid": "p0000019", "repository": "USAP-DC", "title": "Collaborative Research: Grounding Line Forensics: The History of Grounding Line Retreat in the Kamb Ice Stream Outlet Region"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -83.0, "title": "Ice-Penetrating Radar Data Across Siple Coast Grounding Lines", "uid": "609474", "west": -160.0}, {"awards": "0122520 Gogineni, S. Prasad", "bounds_geometry": ["POLYGON((-110 -62,-105 -62,-100 -62,-95 -62,-90 -62,-85 -62,-80 -62,-75 -62,-70 -62,-65 -62,-60 -62,-60 -63.5,-60 -65,-60 -66.5,-60 -68,-60 -69.5,-60 -71,-60 -72.5,-60 -74,-60 -75.5,-60 -77,-65 -77,-70 -77,-75 -77,-80 -77,-85 -77,-90 -77,-95 -77,-100 -77,-105 -77,-110 -77,-110 -75.5,-110 -74,-110 -72.5,-110 -71,-110 -69.5,-110 -68,-110 -66.5,-110 -65,-110 -63.5,-110 -62))"], "date_created": "Wed, 01 Jul 2009 00:00:00 GMT", "description": "The Center for Remote Sensing of Ice Sheets (CReSIS) data from the 2002 and 2006 Flight missions.\n\nBasic Processing has been done to obtain the radar echograms and derived ice thickness data. Algorithms are being developed to reduce the multiples to obtain accurate measurement of ice sheet thickness over some areas. Data are available in Matlab (.mat) and Adobe .pdf formats.", "east": -60.0, "geometry": ["POINT(-85 -69.5)"], "keywords": "Airborne Radar; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Radar", "locations": "Antarctica", "north": -62.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Gogineni, Prasad", "project_titles": "ITR/SI+AP: A Mobile Sensor Web for Polar Ice Sheet Measurements", "projects": [{"proj_uid": "p0000583", "repository": "USAP-DC", "title": "ITR/SI+AP: A Mobile Sensor Web for Polar Ice Sheet Measurements"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -77.0, "title": "Antarctic Radar Echograms and Derived Ice Thickness Data from CReSIS", "uid": "609414", "west": -110.0}, {"awards": "0337567 Jacobel, Robert", "bounds_geometry": ["POLYGON((-140 -82,-139 -82,-138 -82,-137 -82,-136 -82,-135 -82,-134 -82,-133 -82,-132 -82,-131 -82,-130 -82,-130 -82.1,-130 -82.2,-130 -82.3,-130 -82.4,-130 -82.5,-130 -82.6,-130 -82.7,-130 -82.8,-130 -82.9,-130 -83,-131 -83,-132 -83,-133 -83,-134 -83,-135 -83,-136 -83,-137 -83,-138 -83,-139 -83,-140 -83,-140 -82.9,-140 -82.8,-140 -82.7,-140 -82.6,-140 -82.5,-140 -82.4,-140 -82.3,-140 -82.2,-140 -82.1,-140 -82))"], "date_created": "Thu, 26 Mar 2009 00:00:00 GMT", "description": "This data set contains radar data from the Kamb Ice Stream (KIS), formerly known as Ice Stream C, in West Antarctica. The project was part of a larger study to assess the likelihood of ice stream reactivation. Parameters include latitude, longitude, distance along profile, ice thickness pick, bright layer depth, and surface elevation, from approximately 1600 km of ground-based radar traverses recorded during the 2004 and 2005 Antarctic field seasons.\n\nData are available via FTP as ASCII text files (.txt). Profile location maps and sample profile sections are available as Joint Photographic Experts Group (.jpg) image files. The data are also available as binary data on DVD, upon request.", "east": -130.0, "geometry": ["POINT(-135 -82.5)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Kamb Ice Stream", "locations": "Antarctica; Kamb Ice Stream", "north": -82.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Jacobel, Robert", "project_titles": "Collaborative Research: Is Ice Stream C Restarting? Glaciological Investigations of the \u0027Bulge\u0027 and the Trunk of Ice Stream C, West Antartica", "projects": [{"proj_uid": "p0000192", "repository": "USAP-DC", "title": "Collaborative Research: Is Ice Stream C Restarting? Glaciological Investigations of the \u0027Bulge\u0027 and the Trunk of Ice Stream C, West Antartica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -83.0, "title": "Glaciological Investigations of the Bulge and Trunk of Kamb Ice Stream, West Antarctica", "uid": "609380", "west": -140.0}, {"awards": "9319379 Blankenship, Donald; 9911617 Blankenship, Donald", "bounds_geometry": ["POLYGON((-160 -70,-142.5 -70,-125 -70,-107.5 -70,-90 -70,-72.5 -70,-55 -70,-37.5 -70,-20 -70,-2.5 -70,15 -70,15 -72,15 -74,15 -76,15 -78,15 -80,15 -82,15 -84,15 -86,15 -88,15 -90,-2.5 -90,-20 -90,-37.5 -90,-55 -90,-72.5 -90,-90 -90,-107.5 -90,-125 -90,-142.5 -90,-160 -90,-160 -88,-160 -86,-160 -84,-160 -82,-160 -80,-160 -78,-160 -76,-160 -74,-160 -72,-160 -70))"], "date_created": "Fri, 06 Feb 2009 00:00:00 GMT", "description": "This data set is an Antarctic radar-based subglacial lake classification collection, which focuses on the radar reflection properties of each given lake.\n\nThe Subglacial lakes are separated into four categories specified by radar reflection properties. Additional information includes: latitude, longitude, length (in kilometers), hydro-potential (in meters), bed elevation (in meters above WGS84), and ice thickness (in meters).\n\nSource data used to compile this data set were collected between 1998 and 2001. Data are available via FTP as a Microsoft Excel Spreadsheet (XLS), and Tagged Image File Format (TIF).", "east": 15.0, "geometry": ["POINT(-72.5 -80)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Subglacial Lake", "locations": "Antarctica", "north": -70.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Blankenship, Donald D.; Holt, John W.; Carter, Sasha P.", "project_titles": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR)", "projects": [{"proj_uid": "p0000125", "repository": "USAP-DC", "title": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Antarctic Subglacial Lake Classification Inventory", "uid": "609336", "west": -160.0}, {"awards": "0438777 Fritts, David", "bounds_geometry": ["POLYGON((-180 -60,-144 -60,-108 -60,-72 -60,-36 -60,0 -60,36 -60,72 -60,108 -60,144 -60,180 -60,180 -63,180 -66,180 -69,180 -72,180 -75,180 -78,180 -81,180 -84,180 -87,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -87,-180 -84,-180 -81,-180 -78,-180 -75,-180 -72,-180 -69,-180 -66,-180 -63,-180 -60))"], "date_created": "Thu, 01 Jan 2009 00:00:00 GMT", "description": "This proposal is to continue operation and scientific studies with the middle-frequency (MF, 1-30 MHz) mesospheric radar deployed at the British Antarctic station Rothera in 1996. This system is now a key site in the Antarctic MF radar chain near 68 deg. S, which includes also MF radars at Syowa (Japan) and Davis (Australia) stations. This radar comprises the winds component of a developing instrument suite for the mesosphere-thermosphere (MLT) studies at Rothera - a focus of the new BAS 5-year plan, which also includes the Fe temperature lidar (formerly at South Pole) and the mesopause airglow imager for gravity wave studies (formerly at Halley). The Rothera MF radar has just had its antennas and electronics upgraded to achieve better signal-to-noise ratio and more continuous measurements in height and time. The main focus of the proposed research is to extend the knowledge of the polar mesosphere dynamics. The instrument suite at Rothera is ideally positioned for correlative interhemispheric studies with northern hemisphere sites at Poker Flat, Alaska (65 deg. N) and ALOMAR, Norway (69 deg. N) having comparable instrumentation. Further research efforts performed with continued funding will focus on: (1) multi-instrument collaborative studies at Rothera to quantify as fully as possible the dynamics, structure, and variability of the MLT at that location, (2) multi-site (and multi-instrument) studies of large-scale dynamics and variability in the Antarctic (together with the radars and other instrumentation at Davis and Syowa), and (3) interhemispheric studies employing instruments (e.g., the Na resonance lidar and MF radar) at Poker Flat and ALOMAR. It is expected that these studies will lead to a more detailed understanding of (1) mean, tidal, and planetary wave structures at polar latitudes, (2) seasonal, inter-annual, and short-term variability of these structures, (3) hemispheric differences in the tidal and planetary wave structures arising from different source and wave interaction conditions, and (4) the relative influences of gravity waves in the two hemispheres. Such studies will also contribute more generally to an increased awareness of the role of high-latitude processes in global atmospheric dynamics and variability.", "east": 180.0, "geometry": ["POINT(0 -89.999)"], "keywords": "Antarctica; Atmosphere; Meteorology; Radar", "locations": "Antarctica", "north": -60.0, "nsf_funding_programs": null, "persons": "Fritts, David", "project_titles": "Correlative Antarctic and Inter-Hemispheric Dynamics Studies Using the MF Radar at Rothera", "projects": [{"proj_uid": "p0000021", "repository": "USAP-DC", "title": "Correlative Antarctic and Inter-Hemispheric Dynamics Studies Using the MF Radar at Rothera"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "Correlative Antarctic and Inter-Hemispheric Dynamics Studies Using the MF Radar at Rothera", "uid": "600040", "west": -180.0}, {"awards": "9725882 Raymond, Charles", "bounds_geometry": ["POLYGON((-141.6722 -80.1678,-141.34195 -80.1678,-141.0117 -80.1678,-140.68145 -80.1678,-140.3512 -80.1678,-140.02095 -80.1678,-139.6907 -80.1678,-139.36045 -80.1678,-139.0302 -80.1678,-138.69995 -80.1678,-138.3697 -80.1678,-138.3697 -80.4863,-138.3697 -80.8048,-138.3697 -81.1233,-138.3697 -81.4418,-138.3697 -81.7603,-138.3697 -82.0788,-138.3697 -82.3973,-138.3697 -82.7158,-138.3697 -83.0343,-138.3697 -83.3528,-138.69995 -83.3528,-139.0302 -83.3528,-139.36045 -83.3528,-139.6907 -83.3528,-140.02095 -83.3528,-140.3512 -83.3528,-140.68145 -83.3528,-141.0117 -83.3528,-141.34195 -83.3528,-141.6722 -83.3528,-141.6722 -83.0343,-141.6722 -82.7158,-141.6722 -82.3973,-141.6722 -82.0788,-141.6722 -81.7603,-141.6722 -81.4418,-141.6722 -81.1233,-141.6722 -80.8048,-141.6722 -80.4863,-141.6722 -80.1678))"], "date_created": "Fri, 06 Jul 2007 00:00:00 GMT", "description": "This data set consists of surface-based radar measurements, including geometry of the bed, surface, and internal layers, and bed reflectivity measurements at two sites along ice stream margins at Siple Dome, Antarctica. The research is a radar examination of bed reflection characteristics and internal layer geometry in two inter-ice-stream ridges, the Shabtaie Ridge (Ridge D/E) and the Engelhardt Ridge (Ridge B/C), and across margins with the adjacent ice streams, the MacAyeal Ice Stream (Ice Stream E) and the Whillans Ice Stream (Ice Stream B). Investigators collected these radar data from 14 November through 13 December 1998. \n\nData are in Microsoft Word, PDF, ASCII text, MATLAB, binary, and various image formats. Investigators have also provided code for MATLAB routines that they used to view the radar data. Data are available via FTP.", "east": -138.3697, "geometry": ["POINT(-140.02095 -81.7603)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Radar; Siple Dome", "locations": "Antarctica; Siple Dome", "north": -80.1678, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Nereson, Nadine A.; Raymond, Charles", "project_titles": "Internal Stratigraphy and Basal Conditions at the Margins ofActive Ice Streams of the Siple Coast, Antarctica", "projects": [{"proj_uid": "p0000626", "repository": "USAP-DC", "title": "Internal Stratigraphy and Basal Conditions at the Margins ofActive Ice Streams of the Siple Coast, Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core", "south": -83.3528, "title": "Radar Investigations of Antarctic Ice Stream Margins, Siple Dome, 1998", "uid": "609303", "west": -141.6722}, {"awards": "0230197 Holt, John", "bounds_geometry": ["POLYGON((-134.9 -71.7,-129.86 -71.7,-124.82 -71.7,-119.78 -71.7,-114.74 -71.7,-109.7 -71.7,-104.66 -71.7,-99.62 -71.7,-94.58 -71.7,-89.54 -71.7,-84.5 -71.7,-84.5 -72.7,-84.5 -73.7,-84.5 -74.7,-84.5 -75.7,-84.5 -76.7,-84.5 -77.7,-84.5 -78.7,-84.5 -79.7,-84.5 -80.7,-84.5 -81.7,-89.54 -81.7,-94.58 -81.7,-99.62 -81.7,-104.66 -81.7,-109.7 -81.7,-114.74 -81.7,-119.78 -81.7,-124.82 -81.7,-129.86 -81.7,-134.9 -81.7,-134.9 -80.7,-134.9 -79.7,-134.9 -78.7,-134.9 -77.7,-134.9 -76.7,-134.9 -75.7,-134.9 -74.7,-134.9 -73.7,-134.9 -72.7,-134.9 -71.7))"], "date_created": "Wed, 25 Oct 2006 00:00:00 GMT", "description": "This data set includes 5 km gridded data from the Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica (AGASEA) conducted during the 2004-2005 austral summer. Investigators derived maps of the ice sheet surface and subglacial topography, which covers the entire catchments of both the Thwaites Glacier and the Pine Islands Glacier, from airborne survey systems mounted on a Twin Otter aircraft. The surveys had sufficient density to identify critical ice dynamic transitions within the Amundsen Sea Embayment (ASE). \n\nThe ASE is the only major drainage to exhibit significant elevation change over the period of available satellite observations. Modeling of the Western Antarctic Ice Sheet (WAIS) deglaciation pinpointed the Pine Island Glacier and the Thwaites Glacier, which comprise a major portion of the ASE, as the most vulnerable features of the WAIS. Present knowledge of the ice thickness and subglacial boundary conditions in the ASE are insufficient to understand its evolution or its sensitivity to climatic change, and it is not yet determined whether these changes are evidence of ongoing deglaciation or simply a fluctuation that does not threaten the equilibrium of the ice sheet. This research will support the efforts of a community of United States and international researchers to assess the present and predict the future behavior of the ice sheet in the ASE. \n\nThese data are available via FTP.", "east": -84.5, "geometry": ["POINT(-109.7 -76.7)"], "keywords": "AGASEA; Airborne Radar; Amundsen Sea; Antarctica; Elevation; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Solid Earth", "locations": "Antarctica; Amundsen Sea", "north": -71.7, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Holt, John W.; Blankenship, Donald D.; Morse, David L.; Vaughan, David G.; Corr, Hugh F. J.; Young, Duncan A.", "project_titles": "Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica (AGASEA)", "projects": [{"proj_uid": "p0000243", "repository": "USAP-DC", "title": "Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica (AGASEA)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -81.7, "title": "Subglacial Topography: Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica", "uid": "609292", "west": -134.9}, {"awards": "0125276 Albert, Mary", "bounds_geometry": ["POLYGON((124.0218 -80.5304,124.22264 -80.5304,124.42348 -80.5304,124.62432 -80.5304,124.82516 -80.5304,125.026 -80.5304,125.22684 -80.5304,125.42768 -80.5304,125.62852 -80.5304,125.82936 -80.5304,126.0302 -80.5304,126.0302 -80.55538,126.0302 -80.58036,126.0302 -80.60534,126.0302 -80.63032,126.0302 -80.6553,126.0302 -80.68028,126.0302 -80.70526,126.0302 -80.73024,126.0302 -80.75522,126.0302 -80.7802,125.82936 -80.7802,125.62852 -80.7802,125.42768 -80.7802,125.22684 -80.7802,125.026 -80.7802,124.82516 -80.7802,124.62432 -80.7802,124.42348 -80.7802,124.22264 -80.7802,124.0218 -80.7802,124.0218 -80.75522,124.0218 -80.73024,124.0218 -80.70526,124.0218 -80.68028,124.0218 -80.6553,124.0218 -80.63032,124.0218 -80.60534,124.0218 -80.58036,124.0218 -80.55538,124.0218 -80.5304))"], "date_created": "Sat, 10 Jun 2006 00:00:00 GMT", "description": "The Antarctic megadune research was conducted during two field seasons, one in November 2002 and the other in December 2003 through January 2004. The megadune field site is located on the East Antarctic Plateau, southeast of Vostok station. The objectives of this multi-facetted research are to determine the physical characteristics of the firn across the dunes including typical climate indicators such as stable isotopes and major chemical species and to install instruments to measure the time variation of near-surface wind and temperature with depth, to test and refine hypotheses for megadune formation. It is important to improve our current understanding of the megadunes because of their extreme nature, their broad extent, and their potential impact on the climate record. Megadunes are a manifestation of an extreme terrestrial climate and may provide insight on past terrestrial climate or on processes active on other planets.\n\nSnow megadunes are undulating variations in accumulation and surface texture with wavelengths of 2 to 5 km and amplitudes up to 5 meters. The features cover 500,000 km\u003csup\u003e2\u003c/sup\u003e of the East Antarctic plateau, occurring in areas of moderate regional slope and low accumulation on the flanks of the ice sheet between 2500 and 3800 meters elevation. Landsat images and aerial photography indicate the dunes consist of alternating surfaces of glaze and rough sastrugi, with gradational boundaries. This pattern is oriented perpendicular to the mean wind direction, as modeled in katabatic wind studies. Glaze surfaces cover the leeward faces and troughs; rough sastrugi cover the windward faces and crests. The megadune pattern is crossed by smooth to eroded wind-parallel longitudinal dunes. Wind-eroded longitudinal dunes form spectacular 1-meter-high sastrugi in nearby areas.\n\nThis data set contains ground penetrating radar (GPR) data showing surface morphology and internal layering structure along with global positioning system (GPS) data collected within an area of 60 km\u003csup\u003e2\u003c/sup\u003e. GPS data are provided in space-delimited ASCII text Microsoft Excel formats, while GPR data are in JPEG format. Data are available via FTP.", "east": 126.0302, "geometry": ["POINT(125.026 -80.6553)"], "keywords": "Antarctica; East Antarctic Plateau; Glaciology; GPR; GPS; Navigation; Paleoclimate; Snow/ice; Snow/Ice", "locations": "Antarctica; East Antarctic Plateau", "north": -80.5304, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Scambos, Ted; Bauer, Rob", "project_titles": "Collaborative Research: Characteristics of Snow Megadunes and Their Potential Effect on Ice Core Interpretation", "projects": [{"proj_uid": "p0000587", "repository": "USAP-DC", "title": "Collaborative Research: Characteristics of Snow Megadunes and Their Potential Effect on Ice Core Interpretation"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.7802, "title": "GPR and GPS Data: Characteristics of Snow Megadunes and their Potential Effects on Ice Core Interpretation", "uid": "609282", "west": 124.0218}, {"awards": "9909518 Raymond, Charles", "bounds_geometry": ["POLYGON((-158 -81,-155.6 -81,-153.2 -81,-150.8 -81,-148.4 -81,-146 -81,-143.6 -81,-141.2 -81,-138.8 -81,-136.4 -81,-134 -81,-134 -81.3,-134 -81.6,-134 -81.9,-134 -82.2,-134 -82.5,-134 -82.8,-134 -83.1,-134 -83.4,-134 -83.7,-134 -84,-136.4 -84,-138.8 -84,-141.2 -84,-143.6 -84,-146 -84,-148.4 -84,-150.8 -84,-153.2 -84,-155.6 -84,-158 -84,-158 -83.7,-158 -83.4,-158 -83.1,-158 -82.8,-158 -82.5,-158 -82.2,-158 -81.9,-158 -81.6,-158 -81.3,-158 -81))"], "date_created": "Thu, 15 Dec 2005 00:00:00 GMT", "description": "These data consist of ground-based, ice-penetrating radar profiles across satellite-detected lineations and terrains that were taken in the lower reaches of Ross Ice Stream C, also known as the Kamb Ice Stream (KIS); on Roosevelt Island; on the Siple Dome; and on the Shabtaie Ice Ridge.", "east": -134.0, "geometry": ["POINT(-146 -82.5)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Radar; Siple Coast", "locations": "Antarctica; Siple Coast", "north": -81.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Raymond, Charles; Conway, Howard; Catania, Ginny", "project_titles": "Collaborative Research:History and Evolution of the Siple Coast Ice Stream Systems as Recorded by Former Shear-Margin Scars", "projects": [{"proj_uid": "p0000275", "repository": "USAP-DC", "title": "Collaborative Research:History and Evolution of the Siple Coast Ice Stream Systems as Recorded by Former Shear-Margin Scars"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -84.0, "title": "Compilation of Antarctic Radar Data, Siple Coast, 2000-2002", "uid": "609274", "west": -158.0}, {"awards": "0088035 Arcone, Steven", "bounds_geometry": ["POLYGON((-135 -75,-130.5 -75,-126 -75,-121.5 -75,-117 -75,-112.5 -75,-108 -75,-103.5 -75,-99 -75,-94.5 -75,-90 -75,-90 -76.5,-90 -78,-90 -79.5,-90 -81,-90 -82.5,-90 -84,-90 -85.5,-90 -87,-90 -88.5,-90 -90,-94.5 -90,-99 -90,-103.5 -90,-108 -90,-112.5 -90,-117 -90,-121.5 -90,-126 -90,-130.5 -90,-135 -90,-135 -88.5,-135 -87,-135 -85.5,-135 -84,-135 -82.5,-135 -81,-135 -79.5,-135 -78,-135 -76.5,-135 -75))"], "date_created": "Sun, 01 May 2005 00:00:00 GMT", "description": "This data set includes data from radar profiles that were recorded between core sites during the November-December seasons for 1999-2002. Data were collected using an ice-penetrating radar to survey the ice sheet. Ice thickness data are available for a portion of the West Antarctic Ice Sheet. This study is part of the U.S. participation in the International Trans-Antarctic Scientific Expedition (US ITASE). Elevation data are available in Excel and Microsoft Access database format.", "east": -90.0, "geometry": ["POINT(-112.5 -82.5)"], "keywords": "Airborne Radar; Antarctica; Elevation; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; ITASE; Radar; WAIS", "locations": "Antarctica; WAIS", "north": -75.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Arcone, Steven", "project_titles": "High Resolution Radar Profiling of the Snow and Ice Stratigraphy beneath the ITASE Traverses, West Antarctic Ice Sheet", "projects": [{"proj_uid": "p0000146", "repository": "USAP-DC", "title": "High Resolution Radar Profiling of the Snow and Ice Stratigraphy beneath the ITASE Traverses, West Antarctic Ice Sheet"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -90.0, "title": "US International Trans-Antarctic Scientific Expedition 400 MHz Subsurface Radar Profiles", "uid": "609254", "west": -135.0}, {"awards": "9814574 Jacobel, Robert", "bounds_geometry": ["POLYGON((-120 -80,-115.6 -80,-111.2 -80,-106.8 -80,-102.4 -80,-98 -80,-93.6 -80,-89.2 -80,-84.8 -80,-80.4 -80,-76 -80,-76 -81,-76 -82,-76 -83,-76 -84,-76 -85,-76 -86,-76 -87,-76 -88,-76 -89,-76 -90,-80.4 -90,-84.8 -90,-89.2 -90,-93.6 -90,-98 -90,-102.4 -90,-106.8 -90,-111.2 -90,-115.6 -90,-120 -90,-120 -89,-120 -88,-120 -87,-120 -86,-120 -85,-120 -84,-120 -83,-120 -82,-120 -81,-120 -80))"], "date_created": "Fri, 08 Apr 2005 00:00:00 GMT", "description": "Ice thickness and internal layer depth data were collected with a ground-based, ice-penetrating radar study as part of the US International Trans-Antarctic Scientific Expedition (US ITASE) traverse in West Antarctica from 01 November 2001 to 10 January 2003. Longitude, latitude, ice thickness, and depth to a prominent internal reflector were collected at approximately 12 m intervals. Ice thickness values are reported for approximately 90% of the traverse, and internal layer depth values are reported for approximately 80% of the traverse. Data are avaialble in ASCII and JPEG formats via FTP.", "east": -76.0, "geometry": ["POINT(-98 -85)"], "keywords": "Airborne Radar; Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; ITASE; WAIS", "locations": "WAIS; Antarctica", "north": -80.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Jacobel, Robert", "project_titles": "Radar Studies of Internal Stratigraphy and Bedrock Topography along the US ITASE Traverse", "projects": [{"proj_uid": "p0000595", "repository": "USAP-DC", "title": "Radar Studies of Internal Stratigraphy and Bedrock Topography along the US ITASE Traverse"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "ITASE", "south": -90.0, "title": "Ice Thickness and Internal Layer Depth Along the 2001 and 2002 US ITASE Traverses", "uid": "609264", "west": -120.0}, {"awards": "0096299 Mayewski, Paul; 0229573 Mayewski, Paul; 0196441 Hamilton, Gordon; 0088035 Arcone, Steven", "bounds_geometry": ["POLYGON((-123.993 -77.6832,-123.6019 -77.6832,-123.2108 -77.6832,-122.8197 -77.6832,-122.4286 -77.6832,-122.0375 -77.6832,-121.6464 -77.6832,-121.2553 -77.6832,-120.8642 -77.6832,-120.4731 -77.6832,-120.082 -77.6832,-120.082 -77.7232,-120.082 -77.7632,-120.082 -77.8032,-120.082 -77.8432,-120.082 -77.8832,-120.082 -77.9232,-120.082 -77.9632,-120.082 -78.0032,-120.082 -78.0432,-120.082 -78.0832,-120.4731 -78.0832,-120.8642 -78.0832,-121.2553 -78.0832,-121.6464 -78.0832,-122.0375 -78.0832,-122.4286 -78.0832,-122.8197 -78.0832,-123.2108 -78.0832,-123.6019 -78.0832,-123.993 -78.0832,-123.993 -78.0432,-123.993 -78.0032,-123.993 -77.9632,-123.993 -77.9232,-123.993 -77.8832,-123.993 -77.8432,-123.993 -77.8032,-123.993 -77.7632,-123.993 -77.7232,-123.993 -77.6832))"], "date_created": "Wed, 06 Apr 2005 00:00:00 GMT", "description": "Snow accumulation rates typically show high variability over short distances. This data set contains accumulation rates derived from ground-penetrating radar (GPR) used to detect isochronal layers in the firn in West Antarctica. These layers were then dated using results from ice core analyses. These data show that accumulation rates along this profile have decreased in recent decades. The radar profile extends between two ice core sites taken along one of the US-ITASE traverse routes.", "east": -120.082, "geometry": ["POINT(-122.0375 -77.8832)"], "keywords": "Antarctica; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; ITASE; WAIS", "locations": "Antarctica; WAIS", "north": -77.6832, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Spikes, Vandy Blue; Hamilton, Gordon S.; Mayewski, Paul A.; Arcone, Steven; Kaspari, Susan", "project_titles": "High Resolution Radar Profiling of the Snow and Ice Stratigraphy beneath the ITASE Traverses, West Antarctic Ice Sheet", "projects": [{"proj_uid": "p0000146", "repository": "USAP-DC", "title": "High Resolution Radar Profiling of the Snow and Ice Stratigraphy beneath the ITASE Traverses, West Antarctic Ice Sheet"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "ITASE", "south": -78.0832, "title": "US International Trans-Antarctic Scientific Expedition (US ITASE): GPR Profiles and Accumulation Mapping", "uid": "609269", "west": -123.993}, {"awards": "9319369 Blankenship, Donald; 9120464 Blankenship, Donald; 9319379 Blankenship, Donald; 9911617 Blankenship, Donald", "bounds_geometry": ["POLYGON((-90 -68.73,-72 -68.73,-54 -68.73,-36 -68.73,-18 -68.73,0 -68.73,18 -68.73,36 -68.73,54 -68.73,72 -68.73,90 -68.73,90 -69.357,90 -69.984,90 -70.611,90 -71.238,90 -71.865,90 -72.492,90 -73.119,90 -73.746,90 -74.373,90 -75,72 -75,54 -75,36 -75,18 -75,0 -75,-18 -75,-36 -75,-54 -75,-72 -75,-90 -75,-90 -74.373,-90 -73.746,-90 -73.119,-90 -72.492,-90 -71.865,-90 -71.238,-90 -70.611,-90 -69.984,-90 -69.357,-90 -68.73))"], "date_created": "Tue, 13 Jul 2004 00:00:00 GMT", "description": "The data that the Support Office for Aerogeophysical Research (SOAR) provides include various aerogeophysical measurements taken in the West Antarctic Ice Shelf (WAIS) from 1994 to 2001. \n\nThe instruments used in experiments include ice-penetrating radar, laser altimetry and magnetics, and an integrated aerogeophysical platform that includes airborne gravity with carrier-phase GPS to support kinematic differential positioning.\n\nSOAR is a part of the University of Texas Institute for Geophysics (UTIG) and provides several types of data associated with various campaigns over the years. This material is based on work supported by the National Science Foundation under Grants: OPP-9120464, 9319369, 9319379, and 9911617.", "east": 90.0, "geometry": ["POINT(-180 -71.865)"], "keywords": "Airborne Radar; Antarctica; Geology/Geophysics - Other; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Navigation; Potential Field; SOAR; Solid Earth", "locations": "Antarctica", "north": -68.73, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Blankenship, Donald D.; Morse, David L.; Holt, John W.; Dalziel, Ian W.", "project_titles": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR)", "projects": [{"proj_uid": "p0000125", "repository": "USAP-DC", "title": "Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -75.0, "title": "Antarctic Aerogeophysics Data", "uid": "609240", "west": -90.0}, {"awards": "8919147 Elliot, David", "bounds_geometry": ["POLYGON((-134 -80,-131 -80,-128 -80,-125 -80,-122 -80,-119 -80,-116 -80,-113 -80,-110 -80,-107 -80,-104 -80,-104 -80.4,-104 -80.8,-104 -81.2,-104 -81.6,-104 -82,-104 -82.4,-104 -82.8,-104 -83.2,-104 -83.6,-104 -84,-107 -84,-110 -84,-113 -84,-116 -84,-119 -84,-122 -84,-125 -84,-128 -84,-131 -84,-134 -84,-134 -83.6,-134 -83.2,-134 -82.8,-134 -82.4,-134 -82,-134 -81.6,-134 -81.2,-134 -80.8,-134 -80.4,-134 -80))"], "date_created": "Wed, 17 Mar 2004 00:00:00 GMT", "description": "Ice surface elevation and ice thickness data are available for a\nportion of the West Antarctic Ice Sheet. The investigators utilized a\nlaser altimeter and ice-penetrating radar mounted to a Twin Otter\naircraft to survey the ice sheet. Ice surface elevations and ice\nthickness data, derived from laser altimetry and radar sounding\nresults, are available in ASCII format via ftp.\n\nThese data are a result of the Corridor Aerogeophysics of the\nSoutheastern Ross Transect Zone (CASERTZ) experiments of the 1990s.\nThe CASERTZ geophysical surveys were aimed at understanding geological\ncontrols on ice streams of the West Antarctic Ice Sheet, ultimately to\nhelp assess the potential for ice sheet collapse. Blankenship et\nal. (2001) used ice surface elevations and ice thicknesses (reported\nhere) to calculate driving stresses across the ice sheet and thus to identify regions of rapid basal movement by ice streams.", "east": -104.0, "geometry": ["POINT(-119 -82)"], "keywords": "Antarctica; Elevation; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ross Embayment; West Antarctica", "locations": "Ross Embayment; Antarctica; West Antarctica", "north": -80.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Blankenship, Donald D.; Finn, C. A.; Morse, David L.; Peters, M. E.; Kempf, Scott D.; Hodge, S. M.; Behrendt, J. C.; Brozena, J. M.; Studinger, Michael S.; Bell, Robin", "project_titles": "Corridor Aerogeophysics of the Southeastern Ross Transect Zone (CASERTZ), Antarctica", "projects": [{"proj_uid": "p0000056", "repository": "USAP-DC", "title": "Corridor Aerogeophysics of the Southeastern Ross Transect Zone (CASERTZ), Antarctica"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -84.0, "title": "Ice Thickness and Surface Elevation, Southeastern Ross Embayment, West Antarctica", "uid": "609099", "west": -134.0}, {"awards": "0338151 Raymond, Charles", "bounds_geometry": ["POLYGON((-157 -71,-154.9 -71,-152.8 -71,-150.7 -71,-148.6 -71,-146.5 -71,-144.4 -71,-142.3 -71,-140.2 -71,-138.1 -71,-136 -71,-136 -71.9,-136 -72.8,-136 -73.7,-136 -74.6,-136 -75.5,-136 -76.4,-136 -77.3,-136 -78.2,-136 -79.1,-136 -80,-138.1 -80,-140.2 -80,-142.3 -80,-144.4 -80,-146.5 -80,-148.6 -80,-150.7 -80,-152.8 -80,-154.9 -80,-157 -80,-157 -79.1,-157 -78.2,-157 -77.3,-157 -76.4,-157 -75.5,-157 -74.6,-157 -73.7,-157 -72.8,-157 -71.9,-157 -71))"], "date_created": "Wed, 10 Dec 2003 00:00:00 GMT", "description": "This data set provides surface elevation and ice thickness data for a portion of the Marie Byrd Land sector of West Antarctica, including the Ford Ranges, the Sulzberger Ice Shelf, much of the Edward VII Peninsula, and the Shirase Coast region of the eastern Ross Ice Shelf. The investigators used radar sounding and laser altimetry from a Twin Otter aircraft flying at varying altitudes, at least 300 m above the surface, at an air speed of about 130 knots. Surveys were accomplished with 64 flights in December 1998 and January 1999. This research was funded by the National Science Foundation (NSF) contract NSF OPP 9615281.", "east": -136.0, "geometry": ["POINT(-146.5 -75.5)"], "keywords": "Airborne Radar; Airplane; Antarctica; Elevation; Glaciers/ice Sheet; Glaciers/Ice Sheet; Marie Byrd Land", "locations": "Antarctica; Marie Byrd Land", "north": -71.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Luyendyk, Bruce P.; Wilson, Douglas S.", "project_titles": "Glaciological Characteristics of the Ross/Amundsen Sea Ice-flow Divide Deduced by a New Analysis of Ice-penetrating Radar Data", "projects": [{"proj_uid": "p0000017", "repository": "USAP-DC", "title": "Glaciological Characteristics of the Ross/Amundsen Sea Ice-flow Divide Deduced by a New Analysis of Ice-penetrating Radar Data"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -80.0, "title": "Surface Elevation and Ice Thickness, Western Marie Byrd Land, Antarctica", "uid": "609119", "west": -157.0}, {"awards": "9615347 Conway, Howard", "bounds_geometry": ["POLYGON((-161.5307 -79.3539,-161.3584 -79.3539,-161.1861 -79.3539,-161.0138 -79.3539,-160.8415 -79.3539,-160.6692 -79.3539,-160.4969 -79.3539,-160.3246 -79.3539,-160.1523 -79.3539,-159.98 -79.3539,-159.8077 -79.3539,-159.8077 -79.37757,-159.8077 -79.40124,-159.8077 -79.42491,-159.8077 -79.44858,-159.8077 -79.47225,-159.8077 -79.49592,-159.8077 -79.51959,-159.8077 -79.54326,-159.8077 -79.56693,-159.8077 -79.5906,-159.98 -79.5906,-160.1523 -79.5906,-160.3246 -79.5906,-160.4969 -79.5906,-160.6692 -79.5906,-160.8415 -79.5906,-161.0138 -79.5906,-161.1861 -79.5906,-161.3584 -79.5906,-161.5307 -79.5906,-161.5307 -79.56693,-161.5307 -79.54326,-161.5307 -79.51959,-161.5307 -79.49592,-161.5307 -79.47225,-161.5307 -79.44858,-161.5307 -79.42491,-161.5307 -79.40124,-161.5307 -79.37757,-161.5307 -79.3539))"], "date_created": "Fri, 23 May 2003 00:00:00 GMT", "description": "This data set consists of bedrock and surface elevation readings taken by ground penetrating radar and Global Positioning System (GPS) on Roosevelt Island, an ice dome within the Ross Ice Shelf. Locations were validated by GPS readings of poles set in the surface snow. The data was collected between November and December, 1997.\n\nData are available via ftp, and are provided in a text file with an accompanying file that provides GPS locations. Surface and bedrock elevations are given in meters above WGS84.", "east": -159.8077, "geometry": ["POINT(-160.6692 -79.47225)"], "keywords": "Antarctica; Elevation; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; GPR; Roosevelt Island; Solid Earth", "locations": "Roosevelt Island; Antarctica", "north": -79.3539, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Conway, Howard", "project_titles": "Radar Investigations of Former Shear Margins: Roosevelt Island and Ice Stream C", "projects": [{"proj_uid": "p0000164", "repository": "USAP-DC", "title": "Radar Investigations of Former Shear Margins: Roosevelt Island and Ice Stream C"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.5906, "title": "Roosevelt Island Bedrock and Surface Elevations", "uid": "609140", "west": -161.5307}, {"awards": "9615347 Conway, Howard", "bounds_geometry": ["POLYGON((-161.5667 -79.3889,-161.44836 -79.3889,-161.33002 -79.3889,-161.21168 -79.3889,-161.09334 -79.3889,-160.975 -79.3889,-160.85666 -79.3889,-160.73832 -79.3889,-160.61998 -79.3889,-160.50164 -79.3889,-160.3833 -79.3889,-160.3833 -79.41168,-160.3833 -79.43446,-160.3833 -79.45724,-160.3833 -79.48002,-160.3833 -79.5028,-160.3833 -79.52558,-160.3833 -79.54836,-160.3833 -79.57114,-160.3833 -79.59392,-160.3833 -79.6167,-160.50164 -79.6167,-160.61998 -79.6167,-160.73832 -79.6167,-160.85666 -79.6167,-160.975 -79.6167,-161.09334 -79.6167,-161.21168 -79.6167,-161.33002 -79.6167,-161.44836 -79.6167,-161.5667 -79.6167,-161.5667 -79.59392,-161.5667 -79.57114,-161.5667 -79.54836,-161.5667 -79.52558,-161.5667 -79.5028,-161.5667 -79.48002,-161.5667 -79.45724,-161.5667 -79.43446,-161.5667 -79.41168,-161.5667 -79.3889))"], "date_created": "Wed, 14 May 2003 00:00:00 GMT", "description": "This data set measures the radioactive decay of nuclear material from Northern and Southern hemisphere nuclear testing. Firn cores were taken from three locations on Roosevelt Island, an ice dome within the Ross Ice Shelf, and were measured at increasing depth for density in kilograms per cubic meter, and for beta counts per hour per kilogram.\n\nThe data were collected between November and December of 1997. Measurements were taken incrementally down to approximately 17 meters for each of the three cores. Data are available in text format via ftp.", "east": -160.3833, "geometry": ["POINT(-160.975 -79.5028)"], "keywords": "Antarctica; Beta Count; Density; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Physical Properties; Roosevelt Island", "locations": "Roosevelt Island; Antarctica", "north": -79.3889, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Conway, Howard", "project_titles": "Radar Investigations of Former Shear Margins: Roosevelt Island and Ice Stream C", "projects": [{"proj_uid": "p0000164", "repository": "USAP-DC", "title": "Radar Investigations of Former Shear Margins: Roosevelt Island and Ice Stream C"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -79.6167, "title": "Roosevelt Island Ice Core Density and Beta Count Data", "uid": "609139", "west": -161.5667}, {"awards": "9316338 Jacobel, Robert", "bounds_geometry": ["POLYGON((-155 -81,-154 -81,-153 -81,-152 -81,-151 -81,-150 -81,-149 -81,-148 -81,-147 -81,-146 -81,-145 -81,-145 -81.2,-145 -81.4,-145 -81.6,-145 -81.8,-145 -82,-145 -82.2,-145 -82.4,-145 -82.6,-145 -82.8,-145 -83,-146 -83,-147 -83,-148 -83,-149 -83,-150 -83,-151 -83,-152 -83,-153 -83,-154 -83,-155 -83,-155 -82.8,-155 -82.6,-155 -82.4,-155 -82.2,-155 -82,-155 -81.8,-155 -81.6,-155 -81.4,-155 -81.2,-155 -81))"], "date_created": "Fri, 01 Jan 1999 00:00:00 GMT", "description": "The Siple Dome Glaciology and Ice Stream History project was part of Western Divide West Antarctic Ice Cores (WAISCORES), an NSF-funded project to understand the influence of the West Antarctic ice sheet on climate and sea level change. WAISCORES researchers acquired and analyzed ice cores from the Siple Dome, in the Siple Coast region, West Antarctica.\n\nThis project supported glaciological studies of Siple Dome and its surroundings between Ice Streams C and D, via two major goals. First, it sought to characterize the dynamic environment and ice stratigraphy of Siple Dome and its surroundings, with the specific mission of assessing Siple Dome as a potential deep core site; and second, to determine whether the configuration of ice stream flow in the region has changed over time. Both goals are relevant to understanding the dynamics of the West Antarctic Ice Sheet (WAIS), its history, and potential future behavior.\n\nThis project was a collaboration between Saint Olaf College, the University of Washington, and the National Snow and Ice Data Center at the University of Colorado. It included studies of satellite imagery and acquisition and analysis of field data from GPS, firn cores and snow pits, and ground-based ice-penetrating radar.\n\nData in this collection were obtained during two Antarctic field seasons in 1994\u201395 and 1996\u201397. The data set is available via FTP as Microsoft Excel Spreadsheet (.xls) and ASCII tab delimited (.txt) files. Related notes are available as a Microsoft Word (.doc) or text (.txt) file. Related images and charts are available as Graphics Interchange Format (.gif) and Joint Photographic Experts Group (.jpg) files.", "east": -145.0, "geometry": ["POINT(-150 -82)"], "keywords": "Antarctica; Geology/Geophysics - Other; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Sample/collection Description; Sample/Collection Description; Siple Dome; Siple Dome Ice Core", "locations": "Antarctica; Siple Dome", "north": -81.0, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Jacobel, Robert", "project_titles": "Siple Dome Glaciology and Ice Stream History", "projects": [{"proj_uid": "p0000190", "repository": "USAP-DC", "title": "Siple Dome Glaciology and Ice Stream History"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Siple Dome Ice Core", "south": -83.0, "title": "Siple Dome Glaciology and Ice Stream History 1994, 1996", "uid": "609085", "west": -155.0}]

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Dataset Title/Abstract/Map	NSF Award(s)	Date Created	PIs / Scientists	Project Links	Abstract	Bounds Geometry	Geometry	Selected	Visible
Basal Ice Unit Thickness Mapped by the NSF COLDEX MARFA Ice Penetrating Radar	2019719	2025-03-10	Yan, Shuai; Young, Duncan A.; Vega Gonzalez, Alejandra; Singh, Shivangini; Kerr, Megan; Blankenship, Donald D.	Center for Oldest Ice Exploration	This dataset contains the basal ice unit thickness as measured by the NSF COLDEX MARFA ice-penetrating radar survey, which mainly focuses on the southern flank of Dome A. The "basal ice unit" is hereby defined as the bottom portion of the ice sheet where no clear and traceable englacial reflection is detected by the radar sounder. Raw radar data can be found at: https://doi.org/10.15784/601768. The basal ice unit is mapped using the DecisionSpace Geosciences 10ep software package. This dataset provides three data products: <br/>• Thickness of the basal ice unit <br/>• Thickness of the stratigraphic ice unit above the basal ice unit <br/>• The shape of the basal ice unit boundary, where rapid basal ice unit thinning is observed in the middle of the South Pole Basin.	["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))"]	["POINT(75 -87)"]	false	false
Weather, Firn Core, and Ground-penetrating radar data from southern Wilkins and George VI ice shelves, 2018-2019	1745116	2025-02-24	Scambos, Ted; Miller, Julie; Miege, Clement; Montgomery, Lynn; Wallin, Bruce	Antarctic Firn Aquifers: Extent, Characteristics, and Comparison with Greenland Occurrences	Data were collected from two sites, one on the southern Wilkins and another on the southern George VI ice shelves. Both sites were investigated as potential sites of perennial firn aquifers; in the case of the southern Wilkins, an extensive firn aquifer was found (Montgomery et al., 2020). Data sources come from two early-model AMIGOS stations (Scambos et al., 2013), ice cores that were collected by hot-ring coring (Montgomery et al., 2020), and ground-penetrating radar profiles. Thermistor data from several depths within the firn core boreholes, transmitted by the AMIGOS stations, show the progression of the seasonal variations in firn temperature at the sites. Radar data show the depth of the firn aquifer (or, its absence at George VI site), and some drainage effects at a nearby rift at the Wilkins site.	["POLYGON((-73 -70.5,-72.35 -70.5,-71.7 -70.5,-71.05 -70.5,-70.4 -70.5,-69.75 -70.5,-69.1 -70.5,-68.45 -70.5,-67.8 -70.5,-67.15 -70.5,-66.5 -70.5,-66.5 -70.8,-66.5 -71.1,-66.5 -71.4,-66.5 -71.7,-66.5 -72,-66.5 -72.3,-66.5 -72.6,-66.5 -72.9,-66.5 -73.2,-66.5 -73.5,-67.15 -73.5,-67.8 -73.5,-68.45 -73.5,-69.1 -73.5,-69.75 -73.5,-70.4 -73.5,-71.05 -73.5,-71.7 -73.5,-72.35 -73.5,-73 -73.5,-73 -73.2,-73 -72.9,-73 -72.6,-73 -72.3,-73 -72,-73 -71.7,-73 -71.4,-73 -71.1,-73 -70.8,-73 -70.5))"]	["POINT(-69.75 -72)"]	false	false
Pinning-point shear-zone fractures in Thwaites Eastern Ice Shelf (2002 - 2022)	1929991	2025-02-21	Banerjee, Debangshu; Lilien, David; Truffer, Martin; Luckman, Adrian; Wild, Christian; Pettit, Erin; Scambos, Ted; Muto, Atsuhiro; Alley, Karen	NSF-NERC: Thwaites-Amundsen Regional Survey and Network (TARSAN) Integrating Atmosphere-Ice-Ocean Processes affecting the Sub-Ice-Shelf Environment	These datasets include detailed digitized shapefiles of surface fractures (polylines) and internal mélange zones (polygons) within the pinning-point shear zone of the Thwaites Eastern Ice Shelf. They were created using high-resolution (15-meter) panchromatic bands from Landsat 7, 8, and 9, with data from 2002 to 2022. Monthly digitization from January 2020 to July 2022 was also performed using preprocessed Sentinel-1 Synthetic Aperture Radar (SAR) images. Each feature includes attributes such as length and orientation, recorded in the EPSG:3031 coordinate reference system, and detailed in the attribute table. Additional funding was received from NE/S006419/1	["POLYGON((-106.5 -74.5,-106.3 -74.5,-106.1 -74.5,-105.9 -74.5,-105.7 -74.5,-105.5 -74.5,-105.3 -74.5,-105.1 -74.5,-104.9 -74.5,-104.7 -74.5,-104.5 -74.5,-104.5 -74.6,-104.5 -74.7,-104.5 -74.8,-104.5 -74.9,-104.5 -75,-104.5 -75.1,-104.5 -75.2,-104.5 -75.3,-104.5 -75.4,-104.5 -75.5,-104.7 -75.5,-104.9 -75.5,-105.1 -75.5,-105.3 -75.5,-105.5 -75.5,-105.7 -75.5,-105.9 -75.5,-106.1 -75.5,-106.3 -75.5,-106.5 -75.5,-106.5 -75.4,-106.5 -75.3,-106.5 -75.2,-106.5 -75.1,-106.5 -75,-106.5 -74.9,-106.5 -74.8,-106.5 -74.7,-106.5 -74.6,-106.5 -74.5))"]	["POINT(-105.5 -75)"]	false	false
MOT data (Xe/Kr) from Allan Hills ice cores ALHIC1901, 1902, and 1903	1744993	2025-02-12	Higgins, John	Collaborative research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area Center for Oldest Ice Exploration	Between about 2.8-0.9 Ma, Earth’s climate was characterized by 40 kyr cycles, driven or paced by changes in the tilt of Earth’s spin axis. Much is known about the 40k world from studies of deep-sea sediments, but our understanding of climate change during this period and the transition between the 40kyr glacial cycles from 2.8-0.9 Ma and the 100kyr glacial cycles of the last 0.9 Myr is incomplete because we lack records of Antarctic climate and direct records of atmospheric greenhouse gas concentrations. We propose to address these issues by building on our recent studies of >1 Ma ice discovered in shallow ice cores in the Allan Hills Blue Ice Area (BIA), Antarctica. During the 2015-2016 field season we recovered ice from two nearby drill cores that dates to > 2 million years in age using the 40Ar/38Ar ratio of the trapped gases. Our discovery of ice of this antiquity in two cores demonstrates that there is gas-record quality ice from the 40k world in the Allan Hills BIA. To further characterize the composition of Earth’s atmosphere and Antarctic climate during the 40k world we request support for two field seasons to drill new large-volume (4” or 9” diameter) ice cores at sites where we have previously identified >1 Ma ice and nearby sites where ground penetrating radar has identified bedrock features conducive to the preservation of old ice.	["POINT(159.356125 -76.732376)"]	["POINT(159.356125 -76.732376)"]	false	false
CO2 and CH4 from Allan Hills ice cores ALHIC1901, 1902, and 1903	1744993	2025-02-12	Higgins, John	Collaborative research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area Center for Oldest Ice Exploration	Between about 2.8-0.9 Ma, Earth’s climate was characterized by 40 kyr cycles, driven or paced by changes in the tilt of Earth’s spin axis. Much is known about the 40k world from studies of deep-sea sediments, but our understanding of climate change during this period and the transition between the 40kyr glacial cycles from 2.8-0.9 Ma and the 100kyr glacial cycles of the last 0.9 Myr is incomplete because we lack records of Antarctic climate and direct records of atmospheric greenhouse gas concentrations. We propose to address these issues by building on our recent studies of >1 Ma ice discovered in shallow ice cores in the Allan Hills Blue Ice Area (BIA), Antarctica. During the 2015-2016 field season we recovered ice from two nearby drill cores that dates to > 2 million years in age using the 40Ar/38Ar ratio of the trapped gases. Our discovery of ice of this antiquity in two cores demonstrates that there is gas-record quality ice from the 40k world in the Allan Hills BIA. To further characterize the composition of Earth’s atmosphere and Antarctic climate during the 40k world we request support for two field seasons to drill new large-volume (4” or 9” diameter) ice cores at sites where we have previously identified >1 Ma ice and nearby sites where ground penetrating radar has identified bedrock features conducive to the preservation of old ice. <br/>	["POINT(159.3562 -76.73243)"]	["POINT(159.3562 -76.73243)"]	false	false
Heavy noble gases (Ar/Xe/Kr) from ALHIC1901, 1902, and 1903	1744993	2025-02-11	Higgins, John	Collaborative research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area Center for Oldest Ice Exploration	Between about 2.8-0.9 Ma, Earth’s climate was characterized by 40 kyr cycles, driven or paced by changes in the tilt of Earth’s spin axis. Much is known about the 40k world from studies of deep-sea sediments, but our understanding of climate change during this period and the transition between the 40kyr glacial cycles from 2.8-0.9 Ma and the 100kyr glacial cycles of the last 0.9 Myr is incomplete because we lack records of Antarctic climate and direct records of atmospheric greenhouse gas concentrations. We propose to address these issues by building on our recent studies of >1 Ma ice discovered in shallow ice cores in the Allan Hills Blue Ice Area (BIA), Antarctica. During the 2015-2016 field season we recovered ice from two nearby drill cores that dates to > 2 million years in age using the 40Ar/38Ar ratio of the trapped gases. Our discovery of ice of this antiquity in two cores demonstrates that there is gas-record quality ice from the 40k world in the Allan Hills BIA. To further characterize the composition of Earth’s atmosphere and Antarctic climate during the 40k world we request support for two field seasons to drill new large-volume (4” or 9” diameter) ice cores at sites where we have previously identified >1 Ma ice and nearby sites where ground penetrating radar has identified bedrock features conducive to the preservation of old ice.	[]	[]	false	false
Ice-penetrating radar data from the Thwaites Glacier grounding zone	1738989	2024-11-25	Balco, Greg; Campbell, Seth; Goehring, Brent	NSF-NERC: Geological History Constraints on the Magnitude of Grounding Line Retreat in the Thwaites Glacier System	Contains ice-penetrating radar data (10 and 400 MHz) from the Thwaites Glacier grounding zone. The main purpose of collecting these data was for safety assessment at a camp put-in; deep (10 MHz) radar data were also collected opportunistically.	["POLYGON((-104.9429 -75.1543,-104.92228999999999 -75.1543,-104.90168 -75.1543,-104.88107 -75.1543,-104.86046 -75.1543,-104.83985 -75.1543,-104.81924 -75.1543,-104.79863 -75.1543,-104.77802 -75.1543,-104.75741000000001 -75.1543,-104.7368 -75.1543,-104.7368 -75.16263000000001,-104.7368 -75.17096000000001,-104.7368 -75.17929000000001,-104.7368 -75.18762000000001,-104.7368 -75.19595000000001,-104.7368 -75.20428,-104.7368 -75.21261,-104.7368 -75.22094,-104.7368 -75.22927,-104.7368 -75.2376,-104.75741000000001 -75.2376,-104.77802 -75.2376,-104.79863 -75.2376,-104.81924 -75.2376,-104.83985 -75.2376,-104.86046 -75.2376,-104.88107 -75.2376,-104.90168 -75.2376,-104.92228999999999 -75.2376,-104.9429 -75.2376,-104.9429 -75.22927,-104.9429 -75.22094,-104.9429 -75.21261,-104.9429 -75.20428,-104.9429 -75.19595000000001,-104.9429 -75.18762000000001,-104.9429 -75.17929000000001,-104.9429 -75.17096000000001,-104.9429 -75.16263000000001,-104.9429 -75.1543))"]	["POINT(-104.83985 -75.19595000000001)"]	false	false
Ice-penetrating radar data from the northern embayment of the Mt. Murphy massif	1738989	2024-11-13	Balco, Greg; Campbell, Seth; Goehring, Brent	NSF-NERC: Geological History Constraints on the Magnitude of Grounding Line Retreat in the Thwaites Glacier System	Contains ice-penetrating radar data (10, 100, and 400 MHz) from the north side of the Mt. Murphy massif. Most of these data are closely spaced lines used for reconnaissance and site selection for a subglacial bedrock recovery drilling project very close to the ice margin at the north ridge of Kay Peak, a sub-peak of the massif. In addition, there are several longer exploratory lines that cross the embayment between the massif and the Crosson Ice Shelf, some of which may cross grounding lines.	["POLYGON((-110.9665 -75.1967,-110.92041 -75.1967,-110.87432 -75.1967,-110.82822999999999 -75.1967,-110.78214 -75.1967,-110.73605 -75.1967,-110.68996 -75.1967,-110.64386999999999 -75.1967,-110.59778 -75.1967,-110.55169000000001 -75.1967,-110.5056 -75.1967,-110.5056 -75.20331,-110.5056 -75.20992000000001,-110.5056 -75.21653,-110.5056 -75.22314,-110.5056 -75.22975,-110.5056 -75.23636,-110.5056 -75.24297,-110.5056 -75.24958,-110.5056 -75.25619,-110.5056 -75.2628,-110.55169000000001 -75.2628,-110.59778 -75.2628,-110.64386999999999 -75.2628,-110.68996 -75.2628,-110.73605 -75.2628,-110.78214 -75.2628,-110.82822999999999 -75.2628,-110.87432 -75.2628,-110.92041 -75.2628,-110.9665 -75.2628,-110.9665 -75.25619,-110.9665 -75.24958,-110.9665 -75.24297,-110.9665 -75.23636,-110.9665 -75.22975,-110.9665 -75.22314,-110.9665 -75.21653,-110.9665 -75.20992000000001,-110.9665 -75.20331,-110.9665 -75.1967))"]	["POINT(-110.73605 -75.22975)"]	false	false
Surface melt-related multi-source remote-sensing and climate model data over Helheim Glacier, Greenland for segmentation and machine learning applications	2136938	2024-10-07	Alexander, Patrick; Antwerpen, Raphael; Cervone, Guido; Fettweis, Xavier; Lütjens, Björn; Tedesco, Marco	Collaborative Research: EAGER: Generation of high resolution surface melting maps over Antarctica using regional climate models, remote sensing and machine learning	This dataset contains high-resolution satellite-derived snow/ice surface melt-related data on a common 100 m equal area grid (Albers equal area projection; EPSG 9822) over Helheim Glacier and surrounding areas in Greenland. The data is used as part of a machine learning framework that aims to fill data gaps in computed meltwater fraction on the 100 m grid using a range of methods, results of which will be published separately. <br/><br/> <br/><br/>The data include fraction of a grid cell covered by meltwater derived from Sentinel-1 synthetic aperture radar (SAR) backscatter, satellite-derived passive microwave (PMW) brightness temperatures, snowpack liquid water content within the first meter of snow and atmospheric and radiative variables from the Modéle Atmosphérique Règional (MAR) regional climate model, spectral reflectance in four wavelength bands from the Moderate Resolution Imaging Spectroradiometer (MODIS), a static digital elevation model (DEM), and an ice sheet mask. <br/><br/>A similar dataset has also been produced for Larsen C ice shelf and is also available through the US Antarctic Program Data Center. <br/><br/> <br/><br/> <br/><br/>	["POLYGON((-40 67.55,-39.611 67.55,-39.222 67.55,-38.833 67.55,-38.444 67.55,-38.055 67.55,-37.666 67.55,-37.277 67.55,-36.888 67.55,-36.499 67.55,-36.11 67.55,-36.11 67.28999999999999,-36.11 67.03,-36.11 66.77,-36.11 66.51,-36.11 66.25,-36.11 65.99,-36.11 65.73,-36.11 65.47,-36.11 65.21000000000001,-36.11 64.95,-36.499 64.95,-36.888 64.95,-37.277 64.95,-37.666 64.95,-38.055 64.95,-38.444 64.95,-38.833 64.95,-39.222 64.95,-39.611 64.95,-40 64.95,-40 65.21000000000001,-40 65.47,-40 65.73,-40 65.99,-40 66.25,-40 66.51,-40 66.77,-40 67.03,-40 67.28999999999999,-40 67.55))"]	["POINT(-38.055 66.25)"]	false	false
Surface melt-related multi-source remote-sensing and climate model data over Larsen C Ice Shelf, Antarctica for segmentation and machine learning applications	2136938	2024-10-07	Alexander, Patrick; Antwerpen, Raphael; Cervone, Guido; Fettweis, Xavier; Lütjens, Björn; Tedesco, Marco	Collaborative Research: EAGER: Generation of high resolution surface melting maps over Antarctica using regional climate models, remote sensing and machine learning	This dataset contains high-resolution satellite-derived snow/ice surface melt-related data on a common 100 m equal area grid (Lambert azimuthal equal area projection; EPSG 9820) over Larsen C Ice Shelf and surrounding areas in Antarctica. The data is prepared to be used as part of a machine learning framework that aims to fill data gaps in computed meltwater fraction on the 100 m grid using a range of methods, results of which will be published separately. <br/><br/><br/>The data include fraction of a grid cell covered by meltwater derived from Sentinel-1 synthetic aperture radar (SAR) backscatter, satellite-derived passive microwave (PMW) brightness temperatures, snowpack liquid water content within the first meter of snow and atmospheric and radiative variables from the Modéle Atmosphérique Règional (MAR) regional climate model, a static digital elevation model (DEM), and an ice sheet mask. <br/><br/><br/>A similar dataset has been produced for Helheim Glacier, Greenland and is also available through the US Antarctic Program Data Center.	["POLYGON((-68.5 -65.25,-67.35 -65.25,-66.2 -65.25,-65.05 -65.25,-63.9 -65.25,-62.75 -65.25,-61.6 -65.25,-60.45 -65.25,-59.3 -65.25,-58.15 -65.25,-57 -65.25,-57 -65.652,-57 -66.054,-57 -66.456,-57 -66.858,-57 -67.25999999999999,-57 -67.66199999999999,-57 -68.064,-57 -68.466,-57 -68.868,-57 -69.27,-58.15 -69.27,-59.3 -69.27,-60.45 -69.27,-61.6 -69.27,-62.75 -69.27,-63.9 -69.27,-65.05 -69.27,-66.2 -69.27,-67.35 -69.27,-68.5 -69.27,-68.5 -68.868,-68.5 -68.466,-68.5 -68.064,-68.5 -67.66199999999999,-68.5 -67.25999999999999,-68.5 -66.858,-68.5 -66.456,-68.5 -66.054,-68.5 -65.652,-68.5 -65.25))"]	["POINT(-62.75 -67.25999999999999)"]	false	false
Impulse HF radar data from Conway Ridge	0087144	2024-07-22	Hoffman, Andrew; Conway, Howard; Christianson, Knut	Glacial History of Ridge AB, West Antarctica	Marine ice sheets are low-pass filters of climate variability that take centuries to adjust to interior and near-terminus changes in mass balance. Constraining these century-scale changes from satellite observations that span only the last 40 years is challenging. Here, we take a different approach of carefully synthesizing different data sets to infer changes in the configurations of van der Veen and Mercer Ice Streams on the Siple Coast over the past 3000 years from englacial features encoded in ice-penetrating radar data. Englacial radar data from Conway Ridge reveal smooth, surface conformal layers overlying disrupted stratigraphy that suggest the van der Veen Ice Stream was 40 km wider over 3000 years ago. Englacial layer dating indicates that the ice stream narrowed to its present configuration between $\sim3000$ and $\sim1000$ years ago. Similarly disrupted stratigraphy and buried crevasses suggest that ice flowing from Mercer to Whillans Ice Stream across the northwestern tip of the ridge slowed shortly after. Using an ice-flow model capable of simulating shear margin migration, we evaluate whether small changes in ice thickness can lead to large changes in shear margin location. Our results suggest that the tip of Conway Ridge is sensitive to thinning and thickening, and that when the basal strength at the tip of the ridge increases with the height above flotation, the ice sheet shear margins can change quickly.	["POLYGON((-150 -83.5,-148 -83.5,-146 -83.5,-144 -83.5,-142 -83.5,-140 -83.5,-138 -83.5,-136 -83.5,-134 -83.5,-132 -83.5,-130 -83.5,-130 -83.65,-130 -83.8,-130 -83.95,-130 -84.1,-130 -84.25,-130 -84.4,-130 -84.55,-130 -84.7,-130 -84.85,-130 -85,-132 -85,-134 -85,-136 -85,-138 -85,-140 -85,-142 -85,-144 -85,-146 -85,-148 -85,-150 -85,-150 -84.85,-150 -84.7,-150 -84.55,-150 -84.4,-150 -84.25,-150 -84.1,-150 -83.95,-150 -83.8,-150 -83.65,-150 -83.5))"]	["POINT(-140 -84.25)"]	false	false
Shallow Ice Radar (SIR) Dataset from Ross Ice Shelf (ROSETTA-Ice)	0958658 1443534 1444690	2024-05-22	Cordero, Isabel; Frearson, Nicholas; Dhakal, Tejendra; Bertinato, Christopher; Chu, Winnie; Keeshin, Skye; Wearing, Martin; Spergel, Julian; Packard, Sarah; Dong, LingLing; Das, Indrani; Bell, Robin	Development of an Ice Imaging System for Monitoring Changing Ice Sheets Mounted on the NYANG LC-130 Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE)	This Shallow Ice Radar (SIR) dataset is from the Frequency Modulated Continuous Wave (LFMCW) radar system on board the IcePod while deployed with the ROSETTA-Ice project during the austral summers of November 2015 - December 2017. SIR data was collected along the ROSETTA-Ice Survey Grid where possible. More detailed information is included in the ReadMe. This data was processed at Lamont-Doherty Earth Observatory using MATLAB scripts developed in-house by Tejendra Dhakal and Nicholas Frearson, using CReSIS 2013/14 MCoRDS scripts as a foundation. All levels of processed data are Matfiles as a result. Included in this dataset are the following: * SIR level1a Matfiles separated by ROSETTA-Ice Survey Grid Line Number; * SIR long-line images at 300dpi (PNGs) for easy data viewing, rendered in MATLAB from level1 data; * SIR internal reflector digitization picks (CSV), rendered manually using MATLAB picking scripts; * SIR digitization frame images (picked and un-picked) as JPGs output from picking process	["POLYGON((-180 -77,-177 -77,-174 -77,-171 -77,-168 -77,-165 -77,-162 -77,-159 -77,-156 -77,-153 -77,-150 -77,-150 -77.9,-150 -78.8,-150 -79.7,-150 -80.6,-150 -81.5,-150 -82.4,-150 -83.3,-150 -84.2,-150 -85.1,-150 -86,-153 -86,-156 -86,-159 -86,-162 -86,-165 -86,-168 -86,-171 -86,-174 -86,-177 -86,180 -86,178.1 -86,176.2 -86,174.3 -86,172.4 -86,170.5 -86,168.6 -86,166.7 -86,164.8 -86,162.9 -86,161 -86,161 -85.1,161 -84.2,161 -83.3,161 -82.4,161 -81.5,161 -80.6,161 -79.7,161 -78.8,161 -77.9,161 -77,162.9 -77,164.8 -77,166.7 -77,168.6 -77,170.5 -77,172.4 -77,174.3 -77,176.2 -77,178.1 -77,-180 -77))"]	["POINT(-174.5 -81.5)"]	false	false
Deep ICE (DICE) Radar Dataset from Ross Ice Shelf (ROSETTA-Ice)	1443534 0958658 1444690	2024-05-20	Cordero, Isabel; Frearson, Nicholas; Dhakal, Tejendra; Bertinato, Christopher; Millstein, Joanna; Wilner, Joel; Dong, LingLing; Das, Indrani; Spergel, Julian; Chu, Winnie; Bell, Robin	Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE) Development of an Ice Imaging System for Monitoring Changing Ice Sheets Mounted on the NYANG LC-130	This Deep ICE (DICE) radar dataset is from the pulse-chirp depth sounding radar system on board the IcePod while deployed with the ROSETTA-Ice Project during the austral summers of November 2015 - December 2017. DICE data was collected along the ROSETTA-Ice Survey grid where possible. More detailed information is included in the ReadMe, including flight lines with data loss. DICE is a dual channel sensor with pulse-chirp rate of 1us and 3us, which means the data can be processed in four pulse/channel configurations: 1usCh1, 3usCh1, 1usCh2, and 3usCh2. The included dataset is 3usCh1 DICE, which is the preferred configuration. The preferred configuration is 3usCh1, which is included in this dataset. This data was processed at Lamont-Doherty Earth Observatory using MATLAB scripts developed in-house by Tejendra Dhakal and Nicholas Frearson, with CReSIS 2014 MCoRDS scripts as a foundation. As such, all processed levels of this data product are Matfiles. Included in this dataset are the following: * DICE level2a data Matfiles, separated by ROSETTA-Ice Survey Grid Line Number; * DICE long-line images at 300dpi (PNGs) for easy data viewing rendered in MATLAB from level2 data; * DICE Ice Base digitization picks, rendered manually using MATLAB picking script; * DICE digitization frame images (picked and un-picked) as JPGs output from picking process	["POLYGON((-180 -77,-177 -77,-174 -77,-171 -77,-168 -77,-165 -77,-162 -77,-159 -77,-156 -77,-153 -77,-150 -77,-150 -77.9,-150 -78.8,-150 -79.7,-150 -80.6,-150 -81.5,-150 -82.4,-150 -83.3,-150 -84.2,-150 -85.1,-150 -86,-153 -86,-156 -86,-159 -86,-162 -86,-165 -86,-168 -86,-171 -86,-174 -86,-177 -86,180 -86,178.1 -86,176.2 -86,174.3 -86,172.4 -86,170.5 -86,168.6 -86,166.7 -86,164.8 -86,162.9 -86,161 -86,161 -85.1,161 -84.2,161 -83.3,161 -82.4,161 -81.5,161 -80.6,161 -79.7,161 -78.8,161 -77.9,161 -77,162.9 -77,164.8 -77,166.7 -77,168.6 -77,170.5 -77,172.4 -77,174.3 -77,176.2 -77,178.1 -77,-180 -77))"]	["POINT(-174.5 -81.5)"]	false	false
NSF COLDEX Raw MARFA Ice Penetrating Radar data	2019719	2024-02-19	Young, Duncan A.; Blankenship, Donald D.; Greenbaum, Jamin; Kerr, Megan; Buhl, Dillon; Ng, Gregory; Kempf, Scott D.; Chan, Kristian	Center for Oldest Ice Exploration	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). The data is provided in two forms: • Flight based and as recorded on the aircraft in raw packets • Transect based, reorganized into transects corresponding to the survey design, and demultiplexed into text tables and flat binary files.	["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))"]	["POINT(75 -87)"]	false	false
Hercules Dome ApRES Data	1744649	2023-10-09	Hills, Benjamin; Holschuh, Nicholas; Hoffman, Andrew; Fudge, Tyler J; Horlings, Annika; Erwin, Emma; Steig, Eric J.; Christianson, Knut	Ice Dynamics at the Intersection of the West and East Antarctic Ice Sheets	Phase-sensitive radar data collected at Hercules Dome, Antarctica. These data are processed in two ways for two separate objectives. First, repeat acquisitions between years are interfered to interpret vertical velocity. Second, polarized acquisitions are interfered to interpret crystal orientation fabric. The full processing flow is included to recreate the given data products from the included raw data.	["POLYGON((-110.338 -85.76,-109.5454 -85.76,-108.7528 -85.76,-107.9602 -85.76,-107.1676 -85.76,-106.375 -85.76,-105.5824 -85.76,-104.7898 -85.76,-103.9972 -85.76,-103.2046 -85.76,-102.412 -85.76,-102.412 -85.8266,-102.412 -85.89320000000001,-102.412 -85.9598,-102.412 -86.02640000000001,-102.412 -86.093,-102.412 -86.1596,-102.412 -86.2262,-102.412 -86.2928,-102.412 -86.35940000000001,-102.412 -86.426,-103.2046 -86.426,-103.9972 -86.426,-104.7898 -86.426,-105.5824 -86.426,-106.375 -86.426,-107.1676 -86.426,-107.9602 -86.426,-108.7528 -86.426,-109.5454 -86.426,-110.338 -86.426,-110.338 -86.35940000000001,-110.338 -86.2928,-110.338 -86.2262,-110.338 -86.1596,-110.338 -86.093,-110.338 -86.02640000000001,-110.338 -85.9598,-110.338 -85.89320000000001,-110.338 -85.8266,-110.338 -85.76))"]	["POINT(-106.375 -86.093)"]	false	false
Hercules Dome Ice-Penetrating Radar Swath Topographies	1744649	2023-07-21	Hoffman, Andrew; Holschuh, Nicholas; Paden, John; Christianson, Knut	Ice Dynamics at the Intersection of the West and East Antarctic Ice Sheets	This dataset consists of gridded basal topographies in the vicinity of Hercules Dome, East Antarctica generated from multi-element ice-penetrating radar data.	["POLYGON((-120 -85.5,-116.67 -85.5,-113.34 -85.5,-110.01 -85.5,-106.68 -85.5,-103.35 -85.5,-100.02000000000001 -85.5,-96.69 -85.5,-93.36 -85.5,-90.03 -85.5,-86.7 -85.5,-86.7 -85.95,-86.7 -86.4,-86.7 -86.85,-86.7 -87.3,-86.7 -87.75,-86.7 -88.2,-86.7 -88.65,-86.7 -89.1,-86.7 -89.55,-86.7 -90,-90.03 -90,-93.36 -90,-96.69 -90,-100.02 -90,-103.35 -90,-106.68 -90,-110.01 -90,-113.34 -90,-116.67 -90,-120 -90,-120 -89.55,-120 -89.1,-120 -88.65,-120 -88.2,-120 -87.75,-120 -87.3,-120 -86.85,-120 -86.4,-120 -85.95,-120 -85.5))"]	["POINT(-103.35 -87.75)"]	false	false
Hercules Dome High-Frequency Impulse Ice-Penetrating Radar Data	1744649	2023-07-20	Hoffman, Andrew; Christianson, Knut; Hills, Benjamin; Christian, John; Holschuh, Nicholas; Horlings, Annika; O'Connor, Gemma	Ice Dynamics at the Intersection of the West and East Antarctic Ice Sheets	This dataset contains high-frequency impulse radar data collected at western Hercules Dome in East Antarctica.	["POLYGON((-120 -85.5,-116.67 -85.5,-113.34 -85.5,-110.01 -85.5,-106.68 -85.5,-103.35 -85.5,-100.02000000000001 -85.5,-96.69 -85.5,-93.36 -85.5,-90.03 -85.5,-86.7 -85.5,-86.7 -85.95,-86.7 -86.4,-86.7 -86.85,-86.7 -87.3,-86.7 -87.75,-86.7 -88.2,-86.7 -88.65,-86.7 -89.1,-86.7 -89.55,-86.7 -90,-90.03 -90,-93.36 -90,-96.69 -90,-100.02 -90,-103.35 -90,-106.68 -90,-110.01 -90,-113.34 -90,-116.67 -90,-120 -90,-120 -89.55,-120 -89.1,-120 -88.65,-120 -88.2,-120 -87.75,-120 -87.3,-120 -86.85,-120 -86.4,-120 -85.95,-120 -85.5))"]	["POINT(-103.35 -87.75)"]	false	false
ITASE Impulse Radar Hercules Dome to South Pole	1744649	2023-07-20	Hoffman, Andrew; Welch, Brian; Jacobel, Robert; Christianson, Knut	Ice Dynamics at the Intersection of the West and East Antarctic Ice Sheets	This dataset contains high-frequency impulse radar data collected by the United States portion of the International TransAntarctic Scientific Expedition (ITASE) 2001-2002 traverse from the vicinity of Hercules Dome, Antarctica to the South Pole.	["POLYGON((-120 -85.5,-116.67 -85.5,-113.34 -85.5,-110.01 -85.5,-106.68 -85.5,-103.35 -85.5,-100.02000000000001 -85.5,-96.69 -85.5,-93.36 -85.5,-90.03 -85.5,-86.7 -85.5,-86.7 -85.95,-86.7 -86.4,-86.7 -86.85,-86.7 -87.3,-86.7 -87.75,-86.7 -88.2,-86.7 -88.65,-86.7 -89.1,-86.7 -89.55,-86.7 -90,-90.03 -90,-93.36 -90,-96.69 -90,-100.02 -90,-103.35 -90,-106.68 -90,-110.01 -90,-113.34 -90,-116.67 -90,-120 -90,-120 -89.55,-120 -89.1,-120 -88.65,-120 -88.2,-120 -87.75,-120 -87.3,-120 -86.85,-120 -86.4,-120 -85.95,-120 -85.5))"]	["POINT(-103.35 -87.75)"]	false	false
Beardmore Glacier High-Frequency Impulse Radar Data	1141866	2023-07-20	Hoffman, Andrew; Christianson, Knut; Conway, Howard	Collaborative Research: East Antarctic Outlet Glacier Dynamics	This dataset contains high-frequency impulse radar data collected in the vicinity of the Beardmore Glacier grounding zone.	["POLYGON((-176 -83.5,-175.2 -83.5,-174.4 -83.5,-173.6 -83.5,-172.8 -83.5,-172 -83.5,-171.2 -83.5,-170.4 -83.5,-169.6 -83.5,-168.8 -83.5,-168 -83.5,-168 -83.55,-168 -83.6,-168 -83.65,-168 -83.7,-168 -83.75,-168 -83.8,-168 -83.85,-168 -83.9,-168 -83.95,-168 -84,-168.8 -84,-169.6 -84,-170.4 -84,-171.2 -84,-172 -84,-172.8 -84,-173.6 -84,-174.4 -84,-175.2 -84,-176 -84,-176 -83.95,-176 -83.9,-176 -83.85,-176 -83.8,-176 -83.75,-176 -83.7,-176 -83.65,-176 -83.6,-176 -83.55,-176 -83.5))"]	["POINT(-172 -83.75)"]	false	false
2022-23 Allan Hills Intermediate Ice Core Site Selection Field Report	2019719	2023-06-16	Conway, Howard; Brook, Edward J.	Center for Oldest Ice Exploration	This unpublished report describes field activities in the 2022-23 Antarctic field season by the I-188 group within COLDEX. The main purpose of this work was to identify the final coring site for a proposed 1250 m ice core.	["POLYGON((159.17 -76.67,159.195 -76.67,159.22 -76.67,159.24499999999998 -76.67,159.26999999999998 -76.67,159.295 -76.67,159.32 -76.67,159.345 -76.67,159.36999999999998 -76.67,159.39499999999998 -76.67,159.42 -76.67,159.42 -76.676,159.42 -76.682,159.42 -76.688,159.42 -76.694,159.42 -76.7,159.42 -76.706,159.42 -76.712,159.42 -76.718,159.42 -76.724,159.42 -76.73,159.39499999999998 -76.73,159.36999999999998 -76.73,159.345 -76.73,159.32 -76.73,159.295 -76.73,159.26999999999998 -76.73,159.24499999999998 -76.73,159.22 -76.73,159.195 -76.73,159.17 -76.73,159.17 -76.724,159.17 -76.718,159.17 -76.712,159.17 -76.706,159.17 -76.7,159.17 -76.694,159.17 -76.688,159.17 -76.682,159.17 -76.676,159.17 -76.67))"]	["POINT(159.295 -76.7)"]	false	false
MELT 2018-2020 Accumulation Radar at Thwaites	1739003	2023-03-28	Paden, John	No project link provided	Data products (radar echogram images and ice surface and ice bottom tracking) from the two ITGC MELT Accumulation Radar campaigns at Thwaites Glacier.	["POLYGON((-114.2703 -66.8445,-109.54270000000001 -66.8445,-104.8151 -66.8445,-100.0875 -66.8445,-95.35990000000001 -66.8445,-90.6323 -66.8445,-85.9047 -66.8445,-81.1771 -66.8445,-76.4495 -66.8445,-71.7219 -66.8445,-66.9943 -66.8445,-66.9943 -67.98911,-66.9943 -69.13372,-66.9943 -70.27833,-66.9943 -71.42294,-66.9943 -72.56755,-66.9943 -73.71216,-66.9943 -74.85677,-66.9943 -76.00138,-66.9943 -77.14599,-66.9943 -78.2906,-71.72189999999999 -78.2906,-76.4495 -78.2906,-81.1771 -78.2906,-85.90469999999999 -78.2906,-90.6323 -78.2906,-95.3599 -78.2906,-100.0875 -78.2906,-104.8151 -78.2906,-109.5427 -78.2906,-114.2703 -78.2906,-114.2703 -77.14599,-114.2703 -76.00138,-114.2703 -74.85677,-114.2703 -73.71216,-114.2703 -72.56755,-114.2703 -71.42294,-114.2703 -70.27833,-114.2703 -69.13372,-114.2703 -67.98911,-114.2703 -66.8445))"]	["POINT(-90.6323 -72.56755)"]	false	false
200 MHz ground-penetrating radar from Winkie Nunatak, West Antarctica	2317097	2023-03-24	Braddock, Scott	NSF-NERC: Geological History Constraints on the Magnitude of Grounding Line Retreat in the Thwaites Glacier System	This data set contains unprocessed radar profiles collected with a GSSI 200 MHz Hyperstacking antenna near Winkie Nunatak, West Antarctica. This data was collected to estimate depth-to-bedrock along a subglacial ridge line at depths between 20 - 120 meters.	["POLYGON((-99.793 -74.857,-99.7882 -74.857,-99.7834 -74.857,-99.77860000000001 -74.857,-99.77380000000001 -74.857,-99.769 -74.857,-99.7642 -74.857,-99.7594 -74.857,-99.75460000000001 -74.857,-99.74980000000001 -74.857,-99.745 -74.857,-99.745 -74.8583,-99.745 -74.8596,-99.745 -74.8609,-99.745 -74.8622,-99.745 -74.8635,-99.745 -74.8648,-99.745 -74.8661,-99.745 -74.8674,-99.745 -74.8687,-99.745 -74.87,-99.74980000000001 -74.87,-99.75460000000001 -74.87,-99.7594 -74.87,-99.7642 -74.87,-99.769 -74.87,-99.77380000000001 -74.87,-99.77860000000001 -74.87,-99.7834 -74.87,-99.7882 -74.87,-99.793 -74.87,-99.793 -74.8687,-99.793 -74.8674,-99.793 -74.8661,-99.793 -74.8648,-99.793 -74.8635,-99.793 -74.8622,-99.793 -74.8609,-99.793 -74.8596,-99.793 -74.8583,-99.793 -74.857))"]	["POINT(-99.769 -74.8635)"]	false	false
Summer 2021 Summit Station radar echo data	2019597 2112352 2118315	2023-03-20	Besson, Dave	No project link provided	Data collected by RNO-G collaboration, used to calculate attenuation lengths, internal layer reflectivities and bulk refractive index. LPDA transmitter on surface broadcasts ~10-ns high voltage pulse into ice and echoes recorded on similar surface LPDA. Data recorded on digital scope, after averaging 10000 triggers to elucidate weak features. Funding for this dataset was provided by NSF Grants and Deutsche Forschungsgemeinschaft (DFG, Grant NE 2031/2-1).	["POLYGON((-180 72.5797,-158.15409 72.5797,-136.30818 72.5797,-114.46227 72.5797,-92.61636 72.5797,-70.77045 72.5797,-48.92454000000001 72.5797,-27.078630000000004 72.5797,-5.23272 72.5797,16.613190000000003 72.5797,38.4591 72.5797,38.4591 72.57968,38.4591 72.57966,38.4591 72.57964,38.4591 72.57962,38.4591 72.5796,38.4591 72.57957999999999,38.4591 72.57956,38.4591 72.57954,38.4591 72.57952,38.4591 72.5795,16.61319 72.5795,-5.23272 72.5795,-27.078629999999997 72.5795,-48.92454 72.5795,-70.77045000000001 72.5795,-92.61635999999999 72.5795,-114.46226999999999 72.5795,-136.30818 72.5795,-158.15409 72.5795,180 72.5795,165.84593 72.5795,151.69186 72.5795,137.53779 72.5795,123.38372 72.5795,109.22964999999999 72.5795,95.07558 72.5795,80.92151 72.5795,66.76744 72.5795,52.61336999999999 72.5795,38.4593 72.5795,38.4593 72.57952,38.4593 72.57954,38.4593 72.57956,38.4593 72.57957999999999,38.4593 72.5796,38.4593 72.57962,38.4593 72.57964,38.4593 72.57966,38.4593 72.57968,38.4593 72.5797,52.61337 72.5797,66.76744 72.5797,80.92151 72.5797,95.07558 72.5797,109.22965 72.5797,123.38372 72.5797,137.53779 72.5797,151.69186000000002 72.5797,165.84593 72.5797,-180 72.5797))"]	["POINT(-141.5408 72.5796)"]	false	false
AGASEA 4.7 ka Englacial Isochron over the Thwaites Glacier Catchment	1043761 0230197 2127606 0636724	2023-03-15	Muldoon, Gail R.; Young, Duncan A.; Jackson, Charles; Blankenship, Donald D.	Geophysical Investigations of Marie Byrd Land Lithospheric Evolution (GIMBLE) 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	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. This 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 https://doi.org/10.15781/T23B5WS0D The internal radar horizon (IRH) was traced semi-automatically by Gail R. Muldoon using Haliburtons's Landmark software and picker, in a combination of 2D focused and unfocused data. Depths were calculated using a 2 way velocity in ice of 84.5 m/microsecond, and no firn correction. Isochron age is 4711 (+/- 246 ) years. Funding for this dataset as provided by NSF grants and The G. Unger Vetlesen Foundation.	["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))"]	["POINT(-115.5 -77.5)"]	false	false
I-165-M GPR Field Report 2019-2020	1744993	2023-03-03	Nesbitt, Ian; Brook, Edward J.	Center for Oldest Ice Exploration Collaborative research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area	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's 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.	["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))"]	["POINT(159.29167 -76.69999999999999)"]	false	false
2015-2016 GPR Field Report for Allan Hills Shallow Ice Coring	1443260	2023-03-03	MacKay, Sean; Brook, Edward J.	Collaborative Research: Allan HILLs Englacial Site (AHILLES) Selection	This document details the ground penetrating radar (GPR) collection activities carried out by S. Mackay (with assistance from the I-165 field team) in the Allan Hills during the 2015-2016 field season. This document is intended as an informal catalogue of field activities, GPS data points, GPR survey line locations, and initial observations / preliminary analysis. It does not contain detailed analysis beyond standard radar post-processing the migration of a subset of radar lines.	["POLYGON((159 -76.68,159.03 -76.68,159.06 -76.68,159.09 -76.68,159.12 -76.68,159.15 -76.68,159.18 -76.68,159.21 -76.68,159.24 -76.68,159.27 -76.68,159.3 -76.68,159.3 -76.697,159.3 -76.714,159.3 -76.73100000000001,159.3 -76.748,159.3 -76.765,159.3 -76.782,159.3 -76.79899999999999,159.3 -76.816,159.3 -76.833,159.3 -76.85,159.27 -76.85,159.24 -76.85,159.21 -76.85,159.18 -76.85,159.15 -76.85,159.12 -76.85,159.09 -76.85,159.06 -76.85,159.03 -76.85,159 -76.85,159 -76.833,159 -76.816,159 -76.79899999999999,159 -76.782,159 -76.765,159 -76.748,159 -76.73100000000001,159 -76.714,159 -76.697,159 -76.68))"]	["POINT(159.15 -76.765)"]	false	false
Sliding-Law Parameter and Airborne Radar-Derived Basal Reflectivity Data Underneath Thwaites Glacier, Antarctica	2152622	2023-01-25	Das, Indrani	NSF-NERC: PROcesses, drivers, Predictions: Modeling the response of Thwaites Glacier over the next Century using Ice/Ocean Coupled Models (PROPHET)	Data resulting from comparing model and observations of sliding-law parameter and airborne radar-derived basal reflectivity underneath Thwaites Glacier, Antarctica	["POLYGON((-110 -74,-109 -74,-108 -74,-107 -74,-106 -74,-105 -74,-104 -74,-103 -74,-102 -74,-101 -74,-100 -74,-100 -74.3,-100 -74.6,-100 -74.9,-100 -75.2,-100 -75.5,-100 -75.8,-100 -76.1,-100 -76.4,-100 -76.7,-100 -77,-101 -77,-102 -77,-103 -77,-104 -77,-105 -77,-106 -77,-107 -77,-108 -77,-109 -77,-110 -77,-110 -76.7,-110 -76.4,-110 -76.1,-110 -75.8,-110 -75.5,-110 -75.2,-110 -74.9,-110 -74.6,-110 -74.3,-110 -74))"]	["POINT(-105 -75.5)"]	false	false
Ground Penetrating Radar Profiles from Beaches on Joinville Island, Antarctic Peninsula	1644197	2022-12-19	Simms, Alexander	Collaborative Research: New Constraints on Post-Glacial Rebound and Holocene Environmental History along the Northern Antarctic Peninsula from Raised Beaches	This dataset provides the raw and processed ground-penetrating radar (GPR) data collected on Joinville Island in the Antarctic Peninsula.	[]	[]	false	false
Ground-Penetrating Radar data from Livingston Island in the Antarctic Peninsula	1644197	2022-12-19	Simms, Alexander	Collaborative Research: New Constraints on Post-Glacial Rebound and Holocene Environmental History along the Northern Antarctic Peninsula from Raised Beaches	This dataset includes ground-penetrating radar (GPR) data collected on Livingston Island in the Antarctic Peninsula.	[]	[]	false	false
Ice Dynamics at the Intersection of the West and East Antarctic Ice Sheets	1744649	2022-09-07	Christianson, Knut	Ice Dynamics at the Intersection of the West and East Antarctic Ice Sheets	This dataset contains high-frequency impulse radar data collected at western Hercules Dome in East Antarctica.	["POLYGON((-120 -85.5,-116.67 -85.5,-113.34 -85.5,-110.01 -85.5,-106.68 -85.5,-103.35 -85.5,-100.02000000000001 -85.5,-96.69 -85.5,-93.36 -85.5,-90.03 -85.5,-86.7 -85.5,-86.7 -85.95,-86.7 -86.4,-86.7 -86.85,-86.7 -87.3,-86.7 -87.75,-86.7 -88.2,-86.7 -88.65,-86.7 -89.1,-86.7 -89.55,-86.7 -90,-90.03 -90,-93.36 -90,-96.69 -90,-100.02 -90,-103.35 -90,-106.68 -90,-110.01 -90,-113.34 -90,-116.67 -90,-120 -90,-120 -89.55,-120 -89.1,-120 -88.65,-120 -88.2,-120 -87.75,-120 -87.3,-120 -86.85,-120 -86.4,-120 -85.95,-120 -85.5))"]	["POINT(-103.35 -87.75)"]	false	false
ICECAP ice thickness data over the Darwin and Hatherton Glaciers, Transantarctic Mountains, Antarctica	0733025	2022-09-02	Gillespie, Mette; Blankenship, Donald D.; Young, Duncan A.; Siegert, Martin; Holt, John W.; Greenbaum, Jamin; Schroeder, Dustin	IPY Research: Investigating the Cryospheric Evolution of the Central Antarctic Plate (ICECAP)	HiCARS data collected over Darwin and Hatherton Glaciers during ICECAP Test Flight ICP1/F05	["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))"]	["POINT(157.5 -79.7)"]	false	false
RBG - Robb Glacier Survey	9319379	2022-09-01	Blankenship, Donald D.; Bell, Robin; Buck, W. Roger; Young, Duncan A.	Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR)	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.	["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))"]	["POINT(160.5 -82.7)"]	false	false
Support Office for Airborne Research 1 km sampled ice thickness data	9319379	2022-07-24	Blankenship, Donald D.; Young, Duncan A.; Kempf, Scott D.	No project link provided	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. Data is in ASCII format. Transects are separated by GMT style segment headers with the transect name. Columns are: 1. Year 2. Day of Year 3. Seconds of Day 4. Longitude (degrees, WGS-84) 5. Latitude (degrees, WGS-84) 6. Easting (meters, EPSG 3031; Polar Stereographic with true scale at 71˚S) 7. Northing (meters, EPSG 3031; Polar Stereographic with true scale at 71˚S) 8. Surface Elevation (meters, WGS-84) - derived where possible from laser data 9. Ice thickness (meters, using a speed of light in air of 299705000 m/s and a refractive index of 1.78; no firn correction) 10. Bed Elevation (meters, WGS-84) - column 8 minus column 9 11. The transect name formatted by Project/Set/Transect	["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))"]	["POINT(-180 -82.5)"]	false	false
South Pole Lake ApRES Radar	1643353 1744649	2022-01-06	Hills, Benjamin	Collaborative Research: Computational Methods Supporting Joint Seismic and Radar Inversion for Ice Fabric and Temperature in Streaming Flow	These are ground-based radar data collected from a subglacial lake ~15 km from the geographic South Pole. Data were collected with the Autonomous phase-sensitive Radio Echo Sounder (ApRES) (Nicholls et al., 2015). The intention of this dataset is to be used for vertical velocity structure and interpretation.	["POLYGON((-179.9989061 -89.752739299,-143.999017884 -89.752739299,-107.999129669 -89.752739299,-71.9992414529 -89.752739299,-35.9993532372 -89.752739299,0.000534978500013 -89.752739299,36.0004231942 -89.752739299,72.0003114099 -89.752739299,108.000199626 -89.752739299,144.000087841 -89.752739299,179.999976057 -89.752739299,179.999976057 -89.7772743702,179.999976057 -89.8018094414,179.999976057 -89.8263445126,179.999976057 -89.8508795838,179.999976057 -89.875414655,179.999976057 -89.8999497262,179.999976057 -89.9244847974,179.999976057 -89.9490198686,179.999976057 -89.9735549398,179.999976057 -89.998090011,144.000087841 -89.998090011,108.000199626 -89.998090011,72.0003114099 -89.998090011,36.0004231942 -89.998090011,0.000534978499985 -89.998090011,-35.9993532372 -89.998090011,-71.9992414529 -89.998090011,-107.999129669 -89.998090011,-143.999017884 -89.998090011,-179.9989061 -89.998090011,-179.9989061 -89.9735549398,-179.9989061 -89.9490198686,-179.9989061 -89.9244847974,-179.9989061 -89.8999497262,-179.9989061 -89.875414655,-179.9989061 -89.8508795838,-179.9989061 -89.8263445126,-179.9989061 -89.8018094414,-179.9989061 -89.7772743702,-179.9989061 -89.752739299))"]	["POINT(0 -89.999)"]	false	false
South Pole Lake GNSS	1744649 1643353	2022-01-06	Hills, Benjamin	Collaborative Research: Computational Methods Supporting Joint Seismic and Radar Inversion for Ice Fabric and Temperature in Streaming Flow	These are ground-based GNSS data collected from a subglacial lake ~15 km from the geographic South Pole. Data were collected with two separate antenna/receiver systems: 1) Septentrio Altus APS3G antenna/receiver 2) Trimble NetR8 and Trimble Zephyr Geodetic antenna.	["POLYGON((-179.9989061 -89.752739299,-143.999017884 -89.752739299,-107.999129669 -89.752739299,-71.9992414529 -89.752739299,-35.9993532372 -89.752739299,0.000534978500013 -89.752739299,36.0004231942 -89.752739299,72.0003114099 -89.752739299,108.000199626 -89.752739299,144.000087841 -89.752739299,179.999976057 -89.752739299,179.999976057 -89.7772743702,179.999976057 -89.8018094414,179.999976057 -89.8263445126,179.999976057 -89.8508795838,179.999976057 -89.875414655,179.999976057 -89.8999497262,179.999976057 -89.9244847974,179.999976057 -89.9490198686,179.999976057 -89.9735549398,179.999976057 -89.998090011,144.000087841 -89.998090011,108.000199626 -89.998090011,72.0003114099 -89.998090011,36.0004231942 -89.998090011,0.000534978499985 -89.998090011,-35.9993532372 -89.998090011,-71.9992414529 -89.998090011,-107.999129669 -89.998090011,-143.999017884 -89.998090011,-179.9989061 -89.998090011,-179.9989061 -89.9735549398,-179.9989061 -89.9490198686,-179.9989061 -89.9244847974,-179.9989061 -89.8999497262,-179.9989061 -89.875414655,-179.9989061 -89.8508795838,-179.9989061 -89.8263445126,-179.9989061 -89.8018094414,-179.9989061 -89.7772743702,-179.9989061 -89.752739299))"]	["POINT(0 -89.999)"]	false	false
Mt. Waesche ground-penetrating radar data 2018-2019	1744949	2021-12-08	Braddock, Scott	Collaborative Research: Constraining West Antarctic Ice Sheet elevation during the last interglacial	Here we deposited data sets from the 2018-2019 Mt. Waesche field season. Included are 5 MHz, 10 MHz, 100 MHz, and 350 MHz. Datasets are provided in SEG-Y format for the 100 and 350 MHz and H5 files for the 5 and 10 MHz.	["POLYGON((-127.5 -77,-127.4 -77,-127.3 -77,-127.2 -77,-127.1 -77,-127 -77,-126.9 -77,-126.8 -77,-126.7 -77,-126.6 -77,-126.5 -77,-126.5 -77.04,-126.5 -77.08,-126.5 -77.12,-126.5 -77.16,-126.5 -77.2,-126.5 -77.24,-126.5 -77.28,-126.5 -77.32,-126.5 -77.36,-126.5 -77.4,-126.6 -77.4,-126.7 -77.4,-126.8 -77.4,-126.9 -77.4,-127 -77.4,-127.1 -77.4,-127.2 -77.4,-127.3 -77.4,-127.4 -77.4,-127.5 -77.4,-127.5 -77.36,-127.5 -77.32,-127.5 -77.28,-127.5 -77.24,-127.5 -77.2,-127.5 -77.16,-127.5 -77.12,-127.5 -77.08,-127.5 -77.04,-127.5 -77))"]	["POINT(-127 -77.2)"]	false	false
2019 initial L-band radar data for EGRIP	1921418	2021-12-08	Taylor, Drew; Gogineni, Prasad; O'Neill, Charles; Taylor, Ryan	EAGER: L-Band Radar Ice Sounder for Measuring Ice Basal Conditions and Ice-Shelf Melt Rate	This dataset includes a preliminary 1-km line of L-band radar data near the East Greenland Ice core Project. The data have been pulse compressed and focused using a simple Doppler focusing algorithm.	["POLYGON((35 76,35.1 76,35.2 76,35.3 76,35.4 76,35.5 76,35.6 76,35.7 76,35.8 76,35.9 76,36 76,36 75.9,36 75.8,36 75.7,36 75.6,36 75.5,36 75.4,36 75.3,36 75.2,36 75.1,36 75,35.9 75,35.8 75,35.7 75,35.6 75,35.5 75,35.4 75,35.3 75,35.2 75,35.1 75,35 75,35 75.1,35 75.2,35 75.3,35 75.4,35 75.5,35 75.6,35 75.7,35 75.8,35 75.9,35 76))"]	["POINT(35.5 75.5)"]	false	false
2019 initial L-band radar data for Dome Concordia	1921418	2021-12-04	Taylor, Drew; Gogineni, Prasad; O'Neill, Charles; Taylor, Ryan	EAGER: L-Band Radar Ice Sounder for Measuring Ice Basal Conditions and Ice-Shelf Melt Rate	This dataset includes a preliminary set of L-band radar data obtained near Dome Concordia runway. The data consist of stationary profiles that have been pulse compressed and focused using coherent integration.	["POLYGON((123 -75,123.1 -75,123.2 -75,123.3 -75,123.4 -75,123.5 -75,123.6 -75,123.7 -75,123.8 -75,123.9 -75,124 -75,124 -75.1,124 -75.2,124 -75.3,124 -75.4,124 -75.5,124 -75.6,124 -75.7,124 -75.8,124 -75.9,124 -76,123.9 -76,123.8 -76,123.7 -76,123.6 -76,123.5 -76,123.4 -76,123.3 -76,123.2 -76,123.1 -76,123 -76,123 -75.9,123 -75.8,123 -75.7,123 -75.6,123 -75.5,123 -75.4,123 -75.3,123 -75.2,123 -75.1,123 -75))"]	["POINT(123.5 -75.5)"]	false	false
Circum-Antarctic grounding-line sinuosity	1246353 1745055 1745043	2021-11-10	Simkins, Lauren; Stearns, Leigh; Riverman, Kiya	Evidence for Paleo Ice Stream Collapse in the Western Ross Sea since the Last Glacial Maximum. Collaborative Research: Topographic controls on Antarctic Ice Sheet grounding line retreat - integrating models and observations	The dataset here allows exploration of the causes and significance of Antarctic grounding-line sinuosity by coupling observations of contemporary Antarctic grounding lines and paleo-grounding lines expressed as ice-marginal landforms on the Ross Sea continental shelf. Modern grounding lines are derived from the MEaSUREs Version 2 Differential Satellite Radar Interferometry dataset with spatial resolutions of 25-120 m spanning February 1992 to December 2014 (Rignot et al., 2016; Mouginot et al., 2017). The boundaries of individual grounding lines representative of individual glacial catchments (n=664) were delineated by the inflection points of the shear strain rate, εxy (c.f Van der Veen et al., 2011). Sinuosity was calculated as the ratio of the true length, orthogonal to ice-flow direction, of the grounding lines and the straight line length between end-points and in units of km/km. Raster data were extracted at 1-km points along each grounding line; the mean was calculated for each grounding line and merged in a table with sinuosity data. A dataset of 6,275 paleo-grounding lines expressed as ice-marginal landforms on the deglaciated western Ross Sea continental shelf are used in this study, originally published by Simkins et al., 2018. The ice-marginal landforms were mapped from multibeam echo sounder data that was collected onboard the RVIB Nathaniel B. Palmer (NBP) 15-02 cruise using a Kongsberg EM122 operating in dual swath mode at 12 kHz frequency with 30-60% swath overlap (Cruise DOI: 10.7284/901477). The resulting bathymetry data was gridded at 20-40 m with decimeter vertical elevation resolution depending on water depth and sea-state. Sinuosity is calculated as a ratio of true (mapped) landform length, measured in the across paleo-ice flow direction at the crest of the landform, to the straight line distance between the mapped landform endpoints and in units of km/km. To compare modern and paleo-grounding lines, we use a consistent length scale by segmenting the grounding lines into 2-km sections for the two datasets (modern, n=12,966; paleo, n=5,832), even though this eliminates grounding lines that are less than 2-km long and thus results in 1 modern and 3,873 paleo-grounding lines removed. The full-length and 2-km segmented groundings lines are provided as shapefiles "InSAR_groundinglines_full" and "InSAR_groundinglines_2km", the paleo-grounding lines are provided as shapefiles "RossSea_icemarginal_full" and "RossSea_icemarginal_2km", and points marking modern grounding lines retreat from repeat InSAR surveys are provided as shapefile "InSAR_retreat_points", all stored together in a geodatabase named "Antarctic_groundinglines.gbd". Additional grounding line metrics, including length, sinuosity, bed roughness, and bed slope for modern and paleo-grounding lines, and height-above-buoyancy gradient, ice-flow velocity, presence of pinning points and ice shelves are provided for modern grounding lines. The published dataset was compiled and analyzed in the article "Controls on circum-Antarctic grounding-line sinuosity " by Simkins, L.M., Stearns, L.A., and Riverman, K.L, which will be submitted to a peer-review journal in November 2021. References Mouginot, J., B. Scheuchl, and E. Rignot. 2017. MEaSUREs Antarctic Boundaries for IPY 2007-2009 from Satellite Radar, Version 2. [Indicate subset used]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. Rignot, E., J. Mouginot, and B. Scheuchl. 2016. MEaSUREs Antarctic Grounding Line from Differential Satellite Radar Interferometry, Version 2. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. Simkins, L. M., Greenwood, S. L., & Anderson, J. B. (2018). Diagnosing ice sheet grounding line stability from landform morphology. The Cryosphere, 12(8), 2707-2726. Van der Veen, C. J., J. C. Plummer, & L. A. Stearns. (2011). Controls on the recent speed up of Jakobshavn Isbræ, West Greenland. Journal of Glaciology, 57(204), 770-782	["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))"]	["POINT(0 -89.999)"]	false	false
Bistatic Radar Sounding of Whillans Ice Stream, Antarctica and Store Glacier, Greenland	1543441 1656518	2021-09-14	Bienert, Nicole; Schroeder, Dustin; Siegfried, Matthew; Peters, Sean; MacKie, Emma; Dawson, Eliza; Christoffersen, Poul	Collaborative Research: Subglacial Antarctic Lakes Scientific Access (SALSA): Integrated Study of Carbon Cycling in Hydrologically-active Subglacial Environments	This dataset includes raw, uncalibrated voltage vs time measurements from a bistatic radar receiver. We also include some processed data including upsampled matched filtered data, GPS receiver position, antenna separation	[]	[]	false	false
ICECAP: Gridded boundary conditions for Little Dome C, Antarctica, and extracted subglacial lake locations	1443690	2021-07-14	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.	Collaborative Research: Southern Plateau Ice-sheet Characterization and Evolution of the Central Antarctic Plate (SPICECAP)	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.	["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))"]	["POINT(122.5 -75.25)"]	false	false
Titan Dome, East Antarctica, Aerogeophysical Survey	1443690	2021-04-02	Beem, Lucas H.; Young, Duncan A.; Greenbaum, Jamin; Ng, Gregory; Blankenship, Donald D.; Cavitte, Marie G. P; Jingxue, Guo; Bo, Sun; Young, Duncan	Collaborative Research: Southern Plateau Ice-sheet Characterization and Evolution of the Central Antarctic Plate (SPICECAP)	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.	["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))"]	["POINT(168.5 -88)"]	false	false
Radar Sounding Observations of the Amundsen Sea Embayment, 2004-2005	1745137	2021-03-05	Chu, Winnie; Hilger, Andrew M.; Culberg, Riley; Schroeder, Dustin; Jordan, Thomas M.; Seroussi, Helene; Young, Duncan A.; Vaughan, David G.	CAREER: Cross-Instrument Synthesis of Antarctic Radar Sounding Observations	The dataset contains radargrams from the 2004-2005 airborne radar sounding surveys on Pine Island Glacier and Thwaites Glacier as part of the BBAS and AGASEA projects. It also includes basal reflectivity and one-way attenuation rates derived from these radargrams. Radar data from the Pine Island Ice Shelf inland to the Bentley Sublglacial Trench were collected by the British Antarctica Survey (BAS) with the Polarimetric-radar Airborne Science INstrument (PASIN) radar sounder, operating at a center frequency of 150 MHz and 15 MHz bandwidth. Data over Thwaites Glacier were collected by the University of Texas Institute for Geophysics (UTIG) High Capability Airborne Radar Sounder (HiCARS) operating at a center frequency of 60 MHz with 15 MHz of bandwidth. Data are provided as 50km segments in NetCDF files, along with kml location files, and pdf files for browsing radargrams images by flight transect. Details of the processing methods are included in the associated README file. The processed data sets (reflectivity and attenuation) are provided as a single NetCDF file for each flight transect. Details of the calibration and processing procedures are provided in Chu, et al (in review).	["POLYGON((-130 -72.9,-125.27 -72.9,-120.54 -72.9,-115.81 -72.9,-111.08 -72.9,-106.35 -72.9,-101.62 -72.9,-96.89 -72.9,-92.16 -72.9,-87.43 -72.9,-82.7 -72.9,-82.7 -73.76,-82.7 -74.62,-82.7 -75.48,-82.7 -76.34,-82.7 -77.2,-82.7 -78.06,-82.7 -78.92,-82.7 -79.78,-82.7 -80.64,-82.7 -81.5,-87.43 -81.5,-92.16 -81.5,-96.89 -81.5,-101.62 -81.5,-106.35 -81.5,-111.08 -81.5,-115.81 -81.5,-120.54 -81.5,-125.27 -81.5,-130 -81.5,-130 -80.64,-130 -79.78,-130 -78.92,-130 -78.06,-130 -77.2,-130 -76.34,-130 -75.48,-130 -74.62,-130 -73.76,-130 -72.9))"]	["POINT(-106.35 -77.2)"]	false	false
Ice-penetrating radar internal stratigraphy over Dome C and the wider East Antarctic Plateau	0941678 0424589 0733025 1443690	2020-12-18	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.	IPY Research: Investigating the Cryospheric Evolution of the Central Antarctic Plate (ICECAP) Center for Remote Sensing of Ice Sheets (CReSIS) Collaborative Research: Southern Plateau Ice-sheet Characterization and Evolution of the Central Antarctic Plate (SPICECAP)	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, 4759–4777, 2021, https://doi.org/10.5194/essd-13-4759-2021. We 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 & 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. The 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. The 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’s (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. Where 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. The 26 IRHs published here were traced semi-automatically by first author Marie Cavitte, using Landmark's Decision Space Desktop software and its built-in picker. The IRHs are dated at the EDC ice core using the AICC2012 timescale (Veres et al., 2013; Bazin et al., 2013). Ice 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 m 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, 4759–4777, 2021, https://doi.org/10.5194/essd-13-4759-2021. Besides 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. \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.	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Density, hydrology and geophysical measurements from the Wilkins Ice Shelf firn aquifer	1745116	2020-10-21	Miège, Clément; Montgomery, Lynn; Miller, Julie; Scambos, Ted; Wallin, Bruce; Miller, Olivia; Solomon, Kip; Forster, Richard; Koenig, Lora	Antarctic Firn Aquifers: Extent, Characteristics, and Comparison with Greenland Occurrences	This dataset compiles a suite of glaciology (density, stratigraphy), hydrology (slug and dilution tests) and geophysical measurements (GPS, GPR, ApRES) to characterize a firn aquifer observed within the Wilkins Ice Shelf, Antarctica.	["POLYGON((-72 -70.75,-71.95 -70.75,-71.9 -70.75,-71.85 -70.75,-71.8 -70.75,-71.75 -70.75,-71.7 -70.75,-71.65 -70.75,-71.6 -70.75,-71.55 -70.75,-71.5 -70.75,-71.5 -70.775,-71.5 -70.8,-71.5 -70.825,-71.5 -70.85,-71.5 -70.875,-71.5 -70.9,-71.5 -70.925,-71.5 -70.95,-71.5 -70.975,-71.5 -71,-71.55 -71,-71.6 -71,-71.65 -71,-71.7 -71,-71.75 -71,-71.8 -71,-71.85 -71,-71.9 -71,-71.95 -71,-72 -71,-72 -70.975,-72 -70.95,-72 -70.925,-72 -70.9,-72 -70.875,-72 -70.85,-72 -70.825,-72 -70.8,-72 -70.775,-72 -70.75))"]	["POINT(-71.75 -70.875)"]	false	false
ICECAP Basal Interface Specularity Content Profiles: IPY and OIB	1543452 0733025 1443690 0636724	2020-08-24	Young, Duncan A.; Blankenship, Donald D.; Roberts, Jason; Siegert, Martin; van Ommen, Tas; Greenbaum, Jamin; Schroeder, Dustin	Collaborative Research: Southern Plateau Ice-sheet Characterization and Evolution of the Central Antarctic Plate (SPICECAP) East Antarctic Grounding Line Experiment (EAGLE) Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System IPY Research: Investigating the Cryospheric Evolution of the Central Antarctic Plate (ICECAP)	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.	["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))"]	["POINT(125 -72.5)"]	false	false
7MHz radar in the vicinity of South Pole	1443471	2020-08-20	Waddington, Edwin D.; Conway, Howard; Koutnik, Michelle; Fudge, T. J.; Lilien, David; Stevens, Max	Collaborative Research: Characterization of Upstream Ice and Firn Dynamics affecting the South Pole Ice Core	This data set contains ice-penetrating radar measurements of surface topography, ice thickness, internal stratigraphy, and derived bed topography in the vicinity of South Pole.	["POLYGON((-180 -89,-166.5 -89,-153 -89,-139.5 -89,-126 -89,-112.5 -89,-99 -89,-85.5 -89,-72 -89,-58.5 -89,-45 -89,-45 -89.1,-45 -89.2,-45 -89.3,-45 -89.4,-45 -89.5,-45 -89.6,-45 -89.7,-45 -89.8,-45 -89.9,-45 -90,-58.5 -90,-72 -90,-85.5 -90,-99 -90,-112.5 -90,-126 -90,-139.5 -90,-153 -90,-166.5 -90,180 -90,173 -90,166 -90,159 -90,152 -90,145 -90,138 -90,131 -90,124 -90,117 -90,110 -90,110 -89.9,110 -89.8,110 -89.7,110 -89.6,110 -89.5,110 -89.4,110 -89.3,110 -89.2,110 -89.1,110 -89,117 -89,124 -89,131 -89,138 -89,145 -89,152 -89,159 -89,166 -89,173 -89,-180 -89))"]	["POINT(-147.5 -89.5)"]	false	false
ApRES Vertical Strain Study	1142167	2020-05-15	Pettit, Erin	Collaborative Research: VeLveT Ice - eVoLution of Fabric and Texture in Ice at WAIS Divide, West Antarctica	We tested the ability of phase sensitive radar (ApRES) to detect vertical strain throughout the depth of an ice sheet 3400m thick.	["POLYGON((-112.3 -79.2,-112.22 -79.2,-112.14 -79.2,-112.06 -79.2,-111.98 -79.2,-111.9 -79.2,-111.82 -79.2,-111.74 -79.2,-111.66 -79.2,-111.58 -79.2,-111.5 -79.2,-111.5 -79.23,-111.5 -79.26,-111.5 -79.29,-111.5 -79.32,-111.5 -79.35,-111.5 -79.38,-111.5 -79.41,-111.5 -79.44,-111.5 -79.47,-111.5 -79.5,-111.58 -79.5,-111.66 -79.5,-111.74 -79.5,-111.82 -79.5,-111.9 -79.5,-111.98 -79.5,-112.06 -79.5,-112.14 -79.5,-112.22 -79.5,-112.3 -79.5,-112.3 -79.47,-112.3 -79.44,-112.3 -79.41,-112.3 -79.38,-112.3 -79.35,-112.3 -79.32,-112.3 -79.29,-112.3 -79.26,-112.3 -79.23,-112.3 -79.2))"]	["POINT(-111.9 -79.35)"]	false	false
ApRES Firn Density Study	1142167	2020-05-15	Pettit, Erin	Collaborative Research: VeLveT Ice - eVoLution of Fabric and Texture in Ice at WAIS Divide, West Antarctica	We tested the ability of phase sensitive radar (ApRES) to detect firn density profile towards developing a simpler, non destructive, faster method than firn coring.	["POLYGON((-112.3 -79.2,-112.22 -79.2,-112.14 -79.2,-112.06 -79.2,-111.98 -79.2,-111.9 -79.2,-111.82 -79.2,-111.74 -79.2,-111.66 -79.2,-111.58 -79.2,-111.5 -79.2,-111.5 -79.23,-111.5 -79.26,-111.5 -79.29,-111.5 -79.32,-111.5 -79.35,-111.5 -79.38,-111.5 -79.41,-111.5 -79.44,-111.5 -79.47,-111.5 -79.5,-111.58 -79.5,-111.66 -79.5,-111.74 -79.5,-111.82 -79.5,-111.9 -79.5,-111.98 -79.5,-112.06 -79.5,-112.14 -79.5,-112.22 -79.5,-112.3 -79.5,-112.3 -79.47,-112.3 -79.44,-112.3 -79.41,-112.3 -79.38,-112.3 -79.35,-112.3 -79.32,-112.3 -79.29,-112.3 -79.26,-112.3 -79.23,-112.3 -79.2))"]	["POINT(-111.9 -79.35)"]	false	false
SOAR-Lake Vostok Survey airborne radar data	9911617 9978236	2020-04-28	Studinger, Michael S.; Bell, Robin	Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR) Understanding the Boundary Conditions of the Lake Vostok Environment: A Site Survey for Future Work	Processed IcePenetrating Radar Altimeter Shot Data (version 2) acquired during the SOAR Twin Otter expedition SOAR-LVS (2000) This data set was acquired with a IcePenetrating Radar Altimeter during SOAR Twin Otter expedition SOAR-LVS conducted in 2000 (Chief Scientist: Dr. Robin Bell; Investigator(s): Dr. Robin Bell and Dr. Michael Studinger). These data files are of SEGY format and include Reflection Radar shot data and were processed after data collection. Data were acquired as part of the project(s): SOAR-Lake Vostok Survey (LVS) and Understanding the Boundary Conditions of the Lake Vostok Environment: A Site Survey for Future Work	["POLYGON((101.5 -75.5,102.15 -75.5,102.8 -75.5,103.45 -75.5,104.1 -75.5,104.75 -75.5,105.4 -75.5,106.05 -75.5,106.7 -75.5,107.35 -75.5,108 -75.5,108 -75.85,108 -76.2,108 -76.55,108 -76.9,108 -77.25,108 -77.6,108 -77.95,108 -78.3,108 -78.65,108 -79,107.35 -79,106.7 -79,106.05 -79,105.4 -79,104.75 -79,104.1 -79,103.45 -79,102.8 -79,102.15 -79,101.5 -79,101.5 -78.65,101.5 -78.3,101.5 -77.95,101.5 -77.6,101.5 -77.25,101.5 -76.9,101.5 -76.55,101.5 -76.2,101.5 -75.85,101.5 -75.5))"]	["POINT(104.75 -77.25)"]	false	false
SOAR-Lake Vostok Survey bed elevation data	9978236 9911617	2020-04-28	Studinger, Michael S.; Bell, Robin	Understanding the Boundary Conditions of the Lake Vostok Environment: A Site Survey for Future Work Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR)	Bedrock Elevation Data acquired during the SOAR Twin Otter expedition SOAR-LVS (2000) This data set was during SOAR Twin Otter expedition SOAR-LVS conducted in 2000 (Chief Scientist: Dr. Robin Bell; Investigator(s): Dr. Michael Studinger). These data files are of ASCII format and include Bedrock Elevation data and were processed after data collection. Data were acquired as part of the project(s): SOAR-Lake Vostok Survey (LVS) and Understanding the Boundary Conditions of the Lake Vostok Environment: A Site Survey for Future Work	["POLYGON((101.5 -75.5,102.15 -75.5,102.8 -75.5,103.45 -75.5,104.1 -75.5,104.75 -75.5,105.4 -75.5,106.05 -75.5,106.7 -75.5,107.35 -75.5,108 -75.5,108 -75.85,108 -76.2,108 -76.55,108 -76.9,108 -77.25,108 -77.6,108 -77.95,108 -78.3,108 -78.65,108 -79,107.35 -79,106.7 -79,106.05 -79,105.4 -79,104.75 -79,104.1 -79,103.45 -79,102.8 -79,102.15 -79,101.5 -79,101.5 -78.65,101.5 -78.3,101.5 -77.95,101.5 -77.6,101.5 -77.25,101.5 -76.9,101.5 -76.55,101.5 -76.2,101.5 -75.85,101.5 -75.5))"]	["POINT(104.75 -77.25)"]	false	false
SOAR-Lake Vostok Survey surface elevation data	9978236 9911617	2020-04-28	Studinger, Michael S.; Bell, Robin	Understanding the Boundary Conditions of the Lake Vostok Environment: A Site Survey for Future Work Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR)	Surface Elevation Data acquired during the SOAR Twin Otter expedition SOAR-LVS (2000) This data set was during SOAR Twin Otter expedition SOAR-LVS conducted in 2000 (Chief Scientist: Dr. Robin Bell; Investigator(s): Dr. Michael Studinger). These data files are of ASCII format and include Surface Elevation data and were processed after data collection. Data were acquired as part of the project(s): SOAR-Lake Vostok Survey (LVS) and Understanding the Boundary Conditions of the Lake Vostok Environment: A Site Survey for Future Work	["POLYGON((101.5 -75.5,102.15 -75.5,102.8 -75.5,103.45 -75.5,104.1 -75.5,104.75 -75.5,105.4 -75.5,106.05 -75.5,106.7 -75.5,107.35 -75.5,108 -75.5,108 -75.85,108 -76.2,108 -76.55,108 -76.9,108 -77.25,108 -77.6,108 -77.95,108 -78.3,108 -78.65,108 -79,107.35 -79,106.7 -79,106.05 -79,105.4 -79,104.75 -79,104.1 -79,103.45 -79,102.8 -79,102.15 -79,101.5 -79,101.5 -78.65,101.5 -78.3,101.5 -77.95,101.5 -77.6,101.5 -77.25,101.5 -76.9,101.5 -76.55,101.5 -76.2,101.5 -75.85,101.5 -75.5))"]	["POINT(104.75 -77.25)"]	false	false
SOAR-Lake Vostok Survey ice thickness data	9911617 9978236	2020-04-28	Studinger, Michael S.; Bell, Robin	Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR) Understanding the Boundary Conditions of the Lake Vostok Environment: A Site Survey for Future Work	Processed IcePenetrating Radar Altimeter Data acquired during the SOAR Twin Otter expedition SOAR-LVS (2000) This data set was acquired with a IcePenetrating Radar Altimeter during SOAR Twin Otter expedition SOAR-LVS conducted in 2000 (Chief Scientist: Dr. Robin Bell; Investigator(s): Dr. Robin Bell and Dr. Michael Studinger). These data files are of ASCII format and include Ice LayerThickness data and were processed after data collection. Data were acquired as part of the project(s): SOAR-Lake Vostok Survey (LVS) and Understanding the Boundary Conditions of the Lake Vostok Environment: A Site Survey for Future Work	["POLYGON((101.5 -75.5,102.15 -75.5,102.8 -75.5,103.45 -75.5,104.1 -75.5,104.75 -75.5,105.4 -75.5,106.05 -75.5,106.7 -75.5,107.35 -75.5,108 -75.5,108 -75.85,108 -76.2,108 -76.55,108 -76.9,108 -77.25,108 -77.6,108 -77.95,108 -78.3,108 -78.65,108 -79,107.35 -79,106.7 -79,106.05 -79,105.4 -79,104.75 -79,104.1 -79,103.45 -79,102.8 -79,102.15 -79,101.5 -79,101.5 -78.65,101.5 -78.3,101.5 -77.95,101.5 -77.6,101.5 -77.25,101.5 -76.9,101.5 -76.55,101.5 -76.2,101.5 -75.85,101.5 -75.5))"]	["POINT(104.75 -77.25)"]	false	false
Processed Ice Penetrating Radar Altimeter Shot Data (SEGY, version 1) from the Gamburtsev Mountains in Antarctica acquired during the GAMBIT Twin Otter expedition AGAP_GAMBIT (2008)	0632292	2020-04-20	Bell, Robin	Collaborative Research: IPY: GAMBIT: Gamburtsev Aerogeophysical Mapping of Bedrock and Ice Targets	This data set was acquired with a Ice Penetrating Radar Altimeter during GAMBIT Twin Otter expedition AGAP_GAMBIT conducted in 2008 (Chief Scientist: Dr. Robin Bell). These data files are of SEGY format and include Reflection Radar shot data and were processed after data collection. Data were acquired as part of the project(s): AGAP: Exploring the Gamburtsev Subglacial Mountains during the International Polar Year 2007 - 2008 and Antarctica's Gamburtsev Province Project (AGAP).	["POLYGON((65 -77.5,67.4 -77.5,69.8 -77.5,72.2 -77.5,74.6 -77.5,77 -77.5,79.4 -77.5,81.8 -77.5,84.2 -77.5,86.6 -77.5,89 -77.5,89 -78.25,89 -79,89 -79.75,89 -80.5,89 -81.25,89 -82,89 -82.75,89 -83.5,89 -84.25,89 -85,86.6 -85,84.2 -85,81.8 -85,79.4 -85,77 -85,74.6 -85,72.2 -85,69.8 -85,67.4 -85,65 -85,65 -84.25,65 -83.5,65 -82.75,65 -82,65 -81.25,65 -80.5,65 -79.75,65 -79,65 -78.25,65 -77.5))"]	["POINT(77 -81.25)"]	false	false
Processed Ice Penetrating Radar Data (jpeg images) from the Gamburtsev Mountains in Antarctica acquired during GAMBIT	0632292	2020-04-20	Bell, Robin; Studinger, Michael S.	Collaborative Research: IPY: GAMBIT: Gamburtsev Aerogeophysical Mapping of Bedrock and Ice Targets	This data set was acquired with a Ice Penetrating Radar Altimeter during GAMBIT Twin Otter expedition AGAP_GAMBIT conducted in 2008 (Chief Scientist: Dr. Robin Bell). These data files are jpeg images of Reflection Radar data and were processed after data collection. Data were acquired as part of the project(s): AGAP: Exploring the Gamburtsev Subglacial Mountains during the International Polar Year 2007 - 2008 and Antarctica's Gamburtsev Province Project (AGAP).	["POLYGON((65 -77.5,67.4 -77.5,69.8 -77.5,72.2 -77.5,74.6 -77.5,77 -77.5,79.4 -77.5,81.8 -77.5,84.2 -77.5,86.6 -77.5,89 -77.5,89 -78.25,89 -79,89 -79.75,89 -80.5,89 -81.25,89 -82,89 -82.75,89 -83.5,89 -84.25,89 -85,86.6 -85,84.2 -85,81.8 -85,79.4 -85,77 -85,74.6 -85,72.2 -85,69.8 -85,67.4 -85,65 -85,65 -84.25,65 -83.5,65 -82.75,65 -82,65 -81.25,65 -80.5,65 -79.75,65 -79,65 -78.25,65 -77.5))"]	["POINT(77 -81.25)"]	false	false
Processed Ice Penetrating Radar Data (Matlab format) from the Gamburtsev Mountains in Antarctica acquired during GAMBIT	0632292	2020-04-20	Bell, Robin; Studinger, Michael S.	Collaborative Research: IPY: GAMBIT: Gamburtsev Aerogeophysical Mapping of Bedrock and Ice Targets	This data set was acquired with a Ice Penetrating Radar Altimeter during GAMBIT Twin Otter expedition AGAP_GAMBIT conducted in 2008 (Chief Scientist: Dr. Robin Bell). These data files are of MATLAB format and include Reflection Radar data and were processed after data collection. Data were acquired as part of the project(s): AGAP: Exploring the Gamburtsev Subglacial Mountains during the International Polar Year 2007 - 2008 and Antarctica's Gamburtsev Province Project (AGAP).	["POLYGON((65 -77.5,67.4 -77.5,69.8 -77.5,72.2 -77.5,74.6 -77.5,77 -77.5,79.4 -77.5,81.8 -77.5,84.2 -77.5,86.6 -77.5,89 -77.5,89 -78.25,89 -79,89 -79.75,89 -80.5,89 -81.25,89 -82,89 -82.75,89 -83.5,89 -84.25,89 -85,86.6 -85,84.2 -85,81.8 -85,79.4 -85,77 -85,74.6 -85,72.2 -85,69.8 -85,67.4 -85,65 -85,65 -84.25,65 -83.5,65 -82.75,65 -82,65 -81.25,65 -80.5,65 -79.75,65 -79,65 -78.25,65 -77.5))"]	["POINT(77 -81.25)"]	false	false
Processed Ice Penetrating Radar Data (Netcdf format) from the Gamburtsev Mountains in Antarctica acquired during GAMBIT	0632292	2020-04-20	Bell, Robin; Studinger, Michael S.	Collaborative Research: IPY: GAMBIT: Gamburtsev Aerogeophysical Mapping of Bedrock and Ice Targets	This data set was acquired with a Ice Penetrating Radar Altimeter during GAMBIT Twin Otter expedition AGAP_GAMBIT conducted in 2008 (Chief Scientist: Dr. Robin Bell). These data files are of Netcdf format and include Reflection Radar data and were processed after data collection. Data were acquired as part of the project(s): AGAP: Exploring the Gamburtsev Subglacial Mountains during the International Polar Year 2007 - 2008 and Antarctica's Gamburtsev Province Project (AGAP).	["POLYGON((65 -77.5,67.4 -77.5,69.8 -77.5,72.2 -77.5,74.6 -77.5,77 -77.5,79.4 -77.5,81.8 -77.5,84.2 -77.5,86.6 -77.5,89 -77.5,89 -78.25,89 -79,89 -79.75,89 -80.5,89 -81.25,89 -82,89 -82.75,89 -83.5,89 -84.25,89 -85,86.6 -85,84.2 -85,81.8 -85,79.4 -85,77 -85,74.6 -85,72.2 -85,69.8 -85,67.4 -85,65 -85,65 -84.25,65 -83.5,65 -82.75,65 -82,65 -81.25,65 -80.5,65 -79.75,65 -79,65 -78.25,65 -77.5))"]	["POINT(77 -81.25)"]	false	false
SPICEcore Advection	1443471	2020-03-25	Fudge, T. J.	Collaborative Research: Characterization of Upstream Ice and Firn Dynamics affecting the South Pole Ice Core	The South Pole Ice Core (SPICEcore), which spans the past 54,300 years, was drilled far from an ice divide such that ice recovered at depth originated upstream of the core site. If the climate is different upstream, the climate history recovered from the core will be a combination of the upstream conditions advected to the core site and temporal changes. Here, we evaluate the impact of ice advection on two fundamental records from SPICEcore: accumulation rate and water isotopes. We determined past locations of ice deposition based on GPS measurements of the modern velocity field spanning 100 km upstream, where ice of ~20 ka age would likely have originated. Beyond 100 km, there are no velocity measurements, but ice likely originates from Titan Dome, an additional 90 km distant. Shallow radar measurements extending 100 km upstream from the core site reveal large (~20%) variations in accumulation but no significant trend. Water isotope ratios, measured at 12.5 km intervals for the first 100 km of the flowline, show a decrease with elevation of -0.008‰ m-1 for δ18O. Advection adds approximately 1‰ for δ18O to the LGM-to-modern change. We also use an existing ensemble of continental ice-sheet model runs to assess the ice sheet elevation change through time. The magnitude of elevation change is likely small and the sign uncertain. Assuming a lapse rate of 10°C per km of elevation, the inference of LGM-to-modern temperature change is ~1.4°C smaller than if the flow from upstream is not considered.	["POINT(-98.16 -89.99)"]	["POINT(-98.16 -89.99)"]	false	false
Basal Melt, Ice thickness and structure of the Ross Ice Shelf using airborne radar data	1443534	2020-01-10	Das, Indrani; Padman, Laurence; Bell, Robin; Fricker, Helen; Hulbe, Christina; Siddoway, Christine; Dhakal, Tejendra; Frearson, Nicholas; Mosbeux, Cyrille; Cordero, Isabel; Tinto, Kirsty; Siegfried, Matthew	Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE)	This dataset was produced for the manuscript \"Multi-decadal basal melt rates and structure of the Ross Ice Shelf, Antarctica using airborne ice penetrating radar\" by Das et al., 2020 in Journal of Geophysical Research-Earth Surface. It has total ice thickness, thickness of the LMI layer, strain induced thickness change, basal melt rates and the error estimate for basal melt rates.	["POLYGON((-180 -77,-177 -77,-174 -77,-171 -77,-168 -77,-165 -77,-162 -77,-159 -77,-156 -77,-153 -77,-150 -77,-150 -77.9,-150 -78.8,-150 -79.7,-150 -80.6,-150 -81.5,-150 -82.4,-150 -83.3,-150 -84.2,-150 -85.1,-150 -86,-153 -86,-156 -86,-159 -86,-162 -86,-165 -86,-168 -86,-171 -86,-174 -86,-177 -86,180 -86,178.1 -86,176.2 -86,174.3 -86,172.4 -86,170.5 -86,168.6 -86,166.7 -86,164.8 -86,162.9 -86,161 -86,161 -85.1,161 -84.2,161 -83.3,161 -82.4,161 -81.5,161 -80.6,161 -79.7,161 -78.8,161 -77.9,161 -77,162.9 -77,164.8 -77,166.7 -77,168.6 -77,170.5 -77,172.4 -77,174.3 -77,176.2 -77,178.1 -77,-180 -77))"]	["POINT(-174.5 -81.5)"]	false	false
CATS2008: Circum-Antarctic Tidal Simulation version 2008	9896041 1443677	2019-12-19	Howard, Susan L.; Padman, Laurence; Erofeeva, Svetlana	Ocean Tides around Antarctica and in the Southern Ocean Collaborative Research: Uncovering the Ross Ocean and Ice Shelf Environment and Tectonic setting Through Aerogeophysical Surveys and Modeling (ROSETTA-ICE)	CATS2008 is a regional inverse barotropic tide model for the circum-Antarctic ocean on a 4 km grid. The model domain includes ocean cavities under the floating ice shelves. The coastline is based on the MODIS MOA [Scambos et al., 2007; Remote Sensing of Environment] feature identification files, adjusted to match ICESat-derived grounding lines for the Ross and Filchner-Ronne ice shelves and Interferometric Synthetic Aperture Radar (InSAR) grounding lines. The water depth map for open water is based on the 2007 release update to Smith and Sandwell [1997; Science]. Adjustments to this map have been made in various regions, including the open continental shelf in front of the Larsen-C Ice Shelf which has been blended with GEBCO bathymetry. Model type: Tides only; Inverse (data assimilation); barotropic (no vertical variation of currents). Grid: 4-km uniform polar stereographic (centered at 71 degrees S, 70 degrees W) Constituents: M2, S2, N2, K2, K1, O1, P1, Q1, Mf, Mm. Units: z (sea surface height; meters); u,v (currents; cm/s); U,V (transports; m2/s). Coordinates: Currents (u, v) and depth-integrated transports (U, V) are given as East (u, U) and North (v, V) components. Citation: "… an update to the inverse model described by Padman et al. [2002]." See CATS2008_README.pdf for further details.	["POLYGON((-180 -40.231,-144 -40.231,-108 -40.231,-72 -40.231,-36 -40.231,0 -40.231,36 -40.231,72 -40.231,108 -40.231,144 -40.231,180 -40.231,180 -45.2079,180 -50.1848,180 -55.1617,180 -60.1386,180 -65.1155,180 -70.0924,180 -75.0693,180 -80.0462,180 -85.0231,180 -90,144 -90,108 -90,72 -90,36 -90,0 -90,-36 -90,-72 -90,-108 -90,-144 -90,-180 -90,-180 -85.0231,-180 -80.0462,-180 -75.0693,-180 -70.0924,-180 -65.1155,-180 -60.1386,-180 -55.1617,-180 -50.1848,-180 -45.2079,-180 -40.231))"]	["POINT(0 -89.999)"]	false	false
Antarctic topographic and subglacial lake geostatistical simulations	1745137	2019-10-02	MacKie, Emma; Schroeder, Dustin; Caers, Jef; Scheidt, Celine; Siegfried, Matthew	CAREER: Cross-Instrument Synthesis of Antarctic Radar Sounding Observations	These data accompany the paper "Antarctic Topographic Realizations and Geostatistical Modeling Used to Map Subglacial Lakes" (MacKie et al., in review). This dataset contains 100 geostatistically generated subglacial topographic realizations for Antarctica. Data science techniques were used to calculate the probability of the occurrence of radar-detected lakes and altimetry-detected (active) lakes across the continent, using each topographic realization as a parameter. This generated 100 probability maps of the likelihood of radar-detected lake occurrence and 100 probability maps of active lake occurrence. Further statistics were used to generate 100 binary maps showing expected radar-detected lake locations. The ensemble of realizations can be used for uncertainty quantification.	["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))"]	["POINT(0 -89.999)"]	false	false
Geophysical data from Crary Ice Rise, Ross Sea Embayment	1443356 1443552	2019-05-20	Conway, Howard; Koutnik, Michelle; Winberry, Paul; Paden, John	Collaborative Research: Grounding Line Dynamics: Crary Ice Rise Revisited	This data set contains radar-detected measurements of surface topography, internal stratigraphy, ice thickness and derived bed topography across Crary Ice Rise in the Ross Sea Embayment.	["POLYGON((-174.95 -82.65,-174.35 -82.65,-173.75 -82.65,-173.15 -82.65,-172.55 -82.65,-171.95 -82.65,-171.35 -82.65,-170.75 -82.65,-170.15 -82.65,-169.55 -82.65,-168.95 -82.65,-168.95 -82.729,-168.95 -82.808,-168.95 -82.887,-168.95 -82.966,-168.95 -83.045,-168.95 -83.124,-168.95 -83.203,-168.95 -83.282,-168.95 -83.361,-168.95 -83.44,-169.55 -83.44,-170.15 -83.44,-170.75 -83.44,-171.35 -83.44,-171.95 -83.44,-172.55 -83.44,-173.15 -83.44,-173.75 -83.44,-174.35 -83.44,-174.95 -83.44,-174.95 -83.361,-174.95 -83.282,-174.95 -83.203,-174.95 -83.124,-174.95 -83.045,-174.95 -82.966,-174.95 -82.887,-174.95 -82.808,-174.95 -82.729,-174.95 -82.65))"]	["POINT(-171.95 -83.045)"]	false	false
Ground Penetrating Radar Data near Blood Falls, Taylor Glacier	1144177	2019-03-18	Pettit, Erin	Collaborative Research: MIDGE: Minimally Invasive Direct Glacial Exploration of Biogeochemistry, Hydrology and Glaciology of Blood Falls, McMurdo Dry Valleys	This data set contains GPR data along multiple transects of the Blood Falls feature collected in November and Dcember 2013.	["POLYGON((161.8 -77.7,161.88 -77.7,161.96 -77.7,162.04 -77.7,162.12 -77.7,162.2 -77.7,162.28 -77.7,162.36 -77.7,162.44 -77.7,162.52 -77.7,162.6 -77.7,162.6 -77.707,162.6 -77.714,162.6 -77.721,162.6 -77.728,162.6 -77.735,162.6 -77.742,162.6 -77.749,162.6 -77.756,162.6 -77.763,162.6 -77.77,162.52 -77.77,162.44 -77.77,162.36 -77.77,162.28 -77.77,162.2 -77.77,162.12 -77.77,162.04 -77.77,161.96 -77.77,161.88 -77.77,161.8 -77.77,161.8 -77.763,161.8 -77.756,161.8 -77.749,161.8 -77.742,161.8 -77.735,161.8 -77.728,161.8 -77.721,161.8 -77.714,161.8 -77.707,161.8 -77.7))"]	["POINT(162.2 -77.735)"]	false	false
Terrestrial Radar Interferometry near Blood Falls, Taylor Glacier	1144177	2019-03-18	Pettit, Erin	Collaborative Research: MIDGE: Minimally Invasive Direct Glacial Exploration of Biogeochemistry, Hydrology and Glaciology of Blood Falls, McMurdo Dry Valleys	This data set contains GPR data along multiple transects of the Blood Falls feature collected in November and Dcember 2013.	["POLYGON((161.8 -77.7,161.88 -77.7,161.96 -77.7,162.04 -77.7,162.12 -77.7,162.2 -77.7,162.28 -77.7,162.36 -77.7,162.44 -77.7,162.52 -77.7,162.6 -77.7,162.6 -77.707,162.6 -77.714,162.6 -77.721,162.6 -77.728,162.6 -77.735,162.6 -77.742,162.6 -77.749,162.6 -77.756,162.6 -77.763,162.6 -77.77,162.52 -77.77,162.44 -77.77,162.36 -77.77,162.28 -77.77,162.2 -77.77,162.12 -77.77,162.04 -77.77,161.96 -77.77,161.88 -77.77,161.8 -77.77,161.8 -77.763,161.8 -77.756,161.8 -77.749,161.8 -77.742,161.8 -77.735,161.8 -77.728,161.8 -77.721,161.8 -77.714,161.8 -77.707,161.8 -77.7))"]	["POINT(162.2 -77.735)"]	false	false
Basal melt rates of the Ross Ice Shelf near the Whillans Ice Stream grounding line	0838947	2018-09-09	Begeman, Carolyn	Collaborative Research: Integrative Study of Marine Ice Sheet Stability & Subglacial Life Habitats in W Antarctica - Lake & Ice Stream Subglacial Access Research Drilling (LISSARD)	This dataset contains ice-shelf basal melt rates and vertical strain rates for 11 sites near the Whillans Ice Stream grounding line. These rates were determined using Autonomous Phase-Sensitive Radar. Data processing is described in Begeman et al. 2018, JGR Oceans. These sites are concentrated within an embayment of the Ross Ice Shelf. These melt rates and strain rates were determined over periods ranging from 10 to 38 days in December 2014 to January 2015.	["POLYGON((-165.28 -84.24,-165.086 -84.24,-164.892 -84.24,-164.698 -84.24,-164.504 -84.24,-164.31 -84.24,-164.116 -84.24,-163.922 -84.24,-163.728 -84.24,-163.534 -84.24,-163.34 -84.24,-163.34 -84.252,-163.34 -84.264,-163.34 -84.276,-163.34 -84.288,-163.34 -84.3,-163.34 -84.312,-163.34 -84.324,-163.34 -84.336,-163.34 -84.348,-163.34 -84.36,-163.534 -84.36,-163.728 -84.36,-163.922 -84.36,-164.116 -84.36,-164.31 -84.36,-164.504 -84.36,-164.698 -84.36,-164.892 -84.36,-165.086 -84.36,-165.28 -84.36,-165.28 -84.348,-165.28 -84.336,-165.28 -84.324,-165.28 -84.312,-165.28 -84.3,-165.28 -84.288,-165.28 -84.276,-165.28 -84.264,-165.28 -84.252,-165.28 -84.24))"]	["POINT(-164.31 -84.3)"]	false	false
Geophysical measurements Beardmore Glacier, Antarctica	1141866	2018-09-09	Conway, Howard	Collaborative Research: East Antarctic Outlet Glacier Dynamics	This data set contains radar-detected measurements of surface topography, ice thickness and derived bed topography across Beardmore Glacier and its tributary Mill Glacier.	["POLYGON((165.656 -83.357,166.3059 -83.357,166.9558 -83.357,167.6057 -83.357,168.2556 -83.357,168.9055 -83.357,169.5554 -83.357,170.2053 -83.357,170.8552 -83.357,171.5051 -83.357,172.155 -83.357,172.155 -83.6036,172.155 -83.8502,172.155 -84.0968,172.155 -84.3434,172.155 -84.59,172.155 -84.8366,172.155 -85.0832,172.155 -85.3298,172.155 -85.5764,172.155 -85.823,171.5051 -85.823,170.8552 -85.823,170.2053 -85.823,169.5554 -85.823,168.9055 -85.823,168.2556 -85.823,167.6057 -85.823,166.9558 -85.823,166.3059 -85.823,165.656 -85.823,165.656 -85.5764,165.656 -85.3298,165.656 -85.0832,165.656 -84.8366,165.656 -84.59,165.656 -84.3434,165.656 -84.0968,165.656 -83.8502,165.656 -83.6036,165.656 -83.357))"]	["POINT(168.9055 -84.59)"]	false	false
Ground Penetrating Radar Grid Survey of the McMurdo Shear Zone	1245915	2018-06-07	Ray, Laura; Arcone, Steven; Kaluzienski, Lynn; Koons, Peter; Lever, Jim; Walker, Ben	Collaborative Research: Flow and Fracture Dynamics in an Ice Shelf Lateral Margin: Observations and Modeling of the McMurdo Shear Zone	This dataset is comprised of ground penetrating radar data (GSSI DZT format with DZG files for GPS location) of a 28 square km area conduced in the heavily crevassed McMurdo Shear Zone in two consecutive field seasons. A radar system comprised of a GSSI SIR-30 32-bit two-channel control unit and model 5103 “400 MHz” and Model 5106A “200 MHz” antenna units were used to conduct the GPR surveys. The radar system was mounted on a sled and towed by a robot. The robot surveyed the 5 x 5.7 km area on lines separated by 50-m and traveled from West to East and return. The 2014 survey was conducted between Oct 29, 2014 and Nov 9, 2014, and the 2015 survey was conducted between Oct 26, 2015 and Nov 1, 2015. The use of identical waypoints in each year provides an Eulerian sampling protocol, where sampled GPS locations remain fixed, but the ice moves between annual surveys. In 2014, the 400 MHz antenna imaged to a depth of 19 meters, and in 2015, the 400 MHz antenna imaged to a depth of 80 meters to examine englacial ice. In both years, the 200 MHz antenna imaged to a depth of 160 meters.	["POLYGON((168.36 -78.03,168.384 -78.03,168.408 -78.03,168.432 -78.03,168.456 -78.03,168.48 -78.03,168.504 -78.03,168.528 -78.03,168.552 -78.03,168.576 -78.03,168.6 -78.03,168.6 -78.035,168.6 -78.04,168.6 -78.045,168.6 -78.05,168.6 -78.055,168.6 -78.06,168.6 -78.065,168.6 -78.07,168.6 -78.075,168.6 -78.08,168.576 -78.08,168.552 -78.08,168.528 -78.08,168.504 -78.08,168.48 -78.08,168.456 -78.08,168.432 -78.08,168.408 -78.08,168.384 -78.08,168.36 -78.08,168.36 -78.075,168.36 -78.07,168.36 -78.065,168.36 -78.06,168.36 -78.055,168.36 -78.05,168.36 -78.045,168.36 -78.04,168.36 -78.035,168.36 -78.03))"]	["POINT(168.48 -78.055)"]	false	false
Shallow radar near South Pole	1443471	2018-05-25	Lilien, David; Fudge, T. J.; Koutnik, Michelle; Conway, Howard; Waddington, Edwin D.	Collaborative Research: Characterization of Upstream Ice and Firn Dynamics affecting the South Pole Ice Core	These are 200MHz radar data collected upstream of South Pole during the 2016/17 and 2017/18 field seasons. Data are the raw files produced by the GSSI radar controller, and a set of layer picks.	["POLYGON((110 -89,117 -89,124 -89,131 -89,138 -89,145 -89,152 -89,159 -89,166 -89,173 -89,180 -89,180 -89.1,180 -89.2,180 -89.3,180 -89.4,180 -89.5,180 -89.6,180 -89.7,180 -89.8,180 -89.9,180 -90,173 -90,166 -90,159 -90,152 -90,145 -90,138 -90,131 -90,124 -90,117 -90,110 -90,110 -89.9,110 -89.8,110 -89.7,110 -89.6,110 -89.5,110 -89.4,110 -89.3,110 -89.2,110 -89.1,110 -89))"]	["POINT(145 -89.5)"]	false	false
Scar Inlet Terrestrial Radar Interferometry	1565576	2017-12-20	Truffer, Martin	RAPID: Observing the Disintegration of the Scar Inlet Ice Shelf	A terrestrial radar interferometer was set up at a location overlooking a remnant of the Larsen B iceshelf and the adjacent fast ice. Images were acquired every 4 minutes with a Gamma Portable Radar Interferometer - 2. Data include images from two antennas, to allow the generation of interferometric DEMs, as well as line-of-sight displacement fields between consecutive images. The archived data are single-look complex (SLC) images, together with parameter files.	["POLYGON((-62.2 -65.5,-62.12 -65.5,-62.04 -65.5,-61.96 -65.5,-61.88 -65.5,-61.8 -65.5,-61.72 -65.5,-61.64 -65.5,-61.56 -65.5,-61.48 -65.5,-61.4 -65.5,-61.4 -65.53,-61.4 -65.56,-61.4 -65.59,-61.4 -65.62,-61.4 -65.65,-61.4 -65.68,-61.4 -65.71,-61.4 -65.74,-61.4 -65.77,-61.4 -65.8,-61.48 -65.8,-61.56 -65.8,-61.64 -65.8,-61.72 -65.8,-61.8 -65.8,-61.88 -65.8,-61.96 -65.8,-62.04 -65.8,-62.12 -65.8,-62.2 -65.8,-62.2 -65.77,-62.2 -65.74,-62.2 -65.71,-62.2 -65.68,-62.2 -65.65,-62.2 -65.62,-62.2 -65.59,-62.2 -65.56,-62.2 -65.53,-62.2 -65.5))"]	["POINT(-61.8 -65.65)"]	false	false
Roosevelt Island: Radar and GPS	0944307	2017-11-16	Conway, Howard	Collaborative Research: Deglaciation of the Ross Sea Embayment - constraints from Roosevelt Island	Ground-based radar data include radar echograms and .mat files of internal stratigraphy. Also included are picks of ice thickness and surface elevation. <br> GPS data include positions of 142 poles set in 2010 and resurveyed in 2012. Also given are velocity vectors for the poles.	["POLYGON((-162.83 -79.15,-162.637 -79.15,-162.444 -79.15,-162.251 -79.15,-162.058 -79.15,-161.865 -79.15,-161.672 -79.15,-161.479 -79.15,-161.286 -79.15,-161.093 -79.15,-160.9 -79.15,-160.9 -79.1885037,-160.9 -79.2270074,-160.9 -79.2655111,-160.9 -79.3040148,-160.9 -79.3425185,-160.9 -79.3810222,-160.9 -79.4195259,-160.9 -79.4580296,-160.9 -79.4965333,-160.9 -79.535037,-161.093 -79.535037,-161.286 -79.535037,-161.479 -79.535037,-161.672 -79.535037,-161.865 -79.535037,-162.058 -79.535037,-162.251 -79.535037,-162.444 -79.535037,-162.637 -79.535037,-162.83 -79.535037,-162.83 -79.4965333,-162.83 -79.4580296,-162.83 -79.4195259,-162.83 -79.3810222,-162.83 -79.3425185,-162.83 -79.3040148,-162.83 -79.2655111,-162.83 -79.2270074,-162.83 -79.1885037,-162.83 -79.15))"]	["POINT(-161.865 -79.3425185)"]	false	false
Mean surface mass balance over Larsen C ice shelf, Antarctica (1979-2014), assimilated to in situ GPR and snow height data	0732946	2017-09-13	McGrath, Daniel; Steffen, Konrad; Kuipers Munneke, Peter	IPY: Stability of Larsen C Ice Shelf in a Warming Climate	We produce a reconstruction of surface mass balance (SMB) (in mm w.e. per year) by adjusting the 1979-2014 RACMO2 SMB to the spatial pattern of ground-penetrating radar observations and to observations of SMB from sonic height rangers.	["POLYGON((-66 -66,-65.4 -66,-64.8 -66,-64.2 -66,-63.6 -66,-63 -66,-62.4 -66,-61.8 -66,-61.2 -66,-60.6 -66,-60 -66,-60 -66.4,-60 -66.8,-60 -67.2,-60 -67.6,-60 -68,-60 -68.4,-60 -68.8,-60 -69.2,-60 -69.6,-60 -70,-60.6 -70,-61.2 -70,-61.8 -70,-62.4 -70,-63 -70,-63.6 -70,-64.2 -70,-64.8 -70,-65.4 -70,-66 -70,-66 -69.6,-66 -69.2,-66 -68.8,-66 -68.4,-66 -68,-66 -67.6,-66 -67.2,-66 -66.8,-66 -66.4,-66 -66))"]	["POINT(-63 -68)"]	false	false
Radar Depth Sounder Echograms and Ice Thickness	0424589	2017-08-28	Paden, John; Leuschen, Carl; Rodriguez, Fernando; Li, Jilu; Allen, Chris; Gogineni, Prasad	Center for Remote Sensing of Ice Sheets (CReSIS)	The MCoRDS data set contains L1B Geolocated Radar Echo Strength Profile Images and L2 Ice Thickness, Ice Surface, and Ice Bottom elevations over Antarctica taken with the CReSIS Radar Depth Sounders (RDS). The L1B data set includes measurements for echograms, time, latitude, longitude, elevation, as well as flight path charts and echogram images.The L2 data set includes measurements for time, latitude, longitude, elevation, surface, bottom, and thickness.	["POLYGON((143 -74.2,155.9 -74.2,168.8 -74.2,181.7 -74.2,194.6 -74.2,207.5 -74.2,220.4 -74.2,233.3 -74.2,246.2 -74.2,259.1 -74.2,272 -74.2,272 -75.5,272 -76.8,272 -78.1,272 -79.4,272 -80.7,272 -82,272 -83.3,272 -84.6,272 -85.9,272 -87.2,259.1 -87.2,246.2 -87.2,233.3 -87.2,220.4 -87.2,207.5 -87.2,194.6 -87.2,181.7 -87.2,168.8 -87.2,155.9 -87.2,143 -87.2,143 -85.9,143 -84.6,143 -83.3,143 -82,143 -80.7,143 -79.4,143 -78.1,143 -76.8,143 -75.5,143 -74.2))"]	["POINT(-152.5 -80.7)"]	false	false
Snow Radar Echograms	0424589	2017-08-28	Paden, John; Leuschen, Carl; Rodriguez, Fernando; Li, Jilu; Allen, Chris; Gogineni, Prasad	Center for Remote Sensing of Ice Sheets (CReSIS)	The Snow Radar data set contains L1B Geolocated Radar Echo Strength Profiles over Antarctica taken with the CReSIS snow radar. The L1B data set includes echograms with measurements for time, latitude, longitude, elevation, as well as flight path charts and echogram images.	["POLYGON((163.9 -76.5,164.09 -76.5,164.28 -76.5,164.47 -76.5,164.66 -76.5,164.85 -76.5,165.04 -76.5,165.23 -76.5,165.42 -76.5,165.61 -76.5,165.8 -76.5,165.8 -76.57,165.8 -76.64,165.8 -76.71,165.8 -76.78,165.8 -76.85,165.8 -76.92,165.8 -76.99,165.8 -77.06,165.8 -77.13,165.8 -77.2,165.61 -77.2,165.42 -77.2,165.23 -77.2,165.04 -77.2,164.85 -77.2,164.66 -77.2,164.47 -77.2,164.28 -77.2,164.09 -77.2,163.9 -77.2,163.9 -77.13,163.9 -77.06,163.9 -76.99,163.9 -76.92,163.9 -76.85,163.9 -76.78,163.9 -76.71,163.9 -76.64,163.9 -76.57,163.9 -76.5))"]	["POINT(164.85 -76.85)"]	false	false
Ku-band Radar Echograms	0424589	2017-08-28	Paden, John; Leuschen, Carl; Rodriguez, Fernando; Li, Jilu; Allen, Chris; Gogineni, Prasad	Center for Remote Sensing of Ice Sheets (CReSIS)	The Ku-band Radar data set contains L1B Geolocated Radar Echo Strength Profiles over Antarctica taken with the CReSIS Ku-band Radar. The L1B data set includes echograms with measurements for time, latitude, longitude, elevation, as well as flight path charts and echogram images.	["POLYGON((143 -76.5,145.61 -76.5,148.22 -76.5,150.83 -76.5,153.44 -76.5,156.05 -76.5,158.66 -76.5,161.27 -76.5,163.88 -76.5,166.49 -76.5,169.1 -76.5,169.1 -77.07,169.1 -77.64,169.1 -78.21,169.1 -78.78,169.1 -79.35,169.1 -79.92,169.1 -80.49,169.1 -81.06,169.1 -81.63,169.1 -82.2,166.49 -82.2,163.88 -82.2,161.27 -82.2,158.66 -82.2,156.05 -82.2,153.44 -82.2,150.83 -82.2,148.22 -82.2,145.61 -82.2,143 -82.2,143 -81.63,143 -81.06,143 -80.49,143 -79.92,143 -79.35,143 -78.78,143 -78.21,143 -77.64,143 -77.07,143 -76.5))"]	["POINT(156.05 -79.35)"]	false	false
Ground-based ice-penetrating radar profiles collected on the Allan Hills blue ice region	1443260	2017-03-03	Conway, Howard	Collaborative Research: Allan HILLs Englacial Site (AHILLES) Selection	Low (7MHz) and high (20-100MHz) frequency ground-based ice-penetrating radar profiles collected on the Allan Hills blue ice region between January 19 and January 31, 2016. Data include .MAT files with low-frequency content; .DZX metadata, .DZT traces, and .KML tracklines with high-frequency content; and .PDF files with maps and figures.	["POLYGON((159.02 -76.67,159.057 -76.67,159.094 -76.67,159.131 -76.67,159.168 -76.67,159.205 -76.67,159.242 -76.67,159.279 -76.67,159.316 -76.67,159.353 -76.67,159.39 -76.67,159.39 -76.687,159.39 -76.704,159.39 -76.721,159.39 -76.738,159.39 -76.755,159.39 -76.772,159.39 -76.789,159.39 -76.806,159.39 -76.823,159.39 -76.84,159.353 -76.84,159.316 -76.84,159.279 -76.84,159.242 -76.84,159.205 -76.84,159.168 -76.84,159.131 -76.84,159.094 -76.84,159.057 -76.84,159.02 -76.84,159.02 -76.823,159.02 -76.806,159.02 -76.789,159.02 -76.772,159.02 -76.755,159.02 -76.738,159.02 -76.721,159.02 -76.704,159.02 -76.687,159.02 -76.67))"]	["POINT(159.205 -76.755)"]	false	false
Magnetic anomaly data over central Marie Byrd Land, West Antarctica (GIMBLE.GMGEO2)	1043761	2017-02-20	Young, Duncan A.; Holt, John W.; Blankenship, Donald D.	Geophysical Investigations of Marie Byrd Land Lithospheric Evolution (GIMBLE)	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.	["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))"]	["POINT(-133 -77.25)"]	false	false
Gravity disturbance data over central Marie Byrd Land, West Antarctica (GIMBLE.GGCMG2)	1043761	2017-02-20	Young, Duncan A.; Holt, John W.; Blankenship, Donald D.	Geophysical Investigations of Marie Byrd Land Lithospheric Evolution (GIMBLE)	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.	["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))"]	["POINT(-133 -77.25)"]	false	false
Ice thickness and related data over central Marie Byrd Land, West Antarctica (GIMBLE.GR2HI2)	1043761	2017-02-20	Young, Duncan A.; Holt, John W.; Blankenship, Donald D.	Geophysical Investigations of Marie Byrd Land Lithospheric Evolution (GIMBLE)	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.	["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))"]	["POINT(-133 -77.25)"]	false	false
Airborne radar profiles of the Whillans, Bindschadler, and Kamb Ice Streams	0424589	2016-12-28	Paden, John; Hale, Richard	Center for Remote Sensing of Ice Sheets (CReSIS)	The Center for Remote Sensing of Ice Sheets (CReSIS) participated in an airborne radar survey using a BT-67 Basler aircraft over the Siple Coast of Antarctica. Five personnel deployed from November 29, 2013 to January 18, 2014 with USAP project# I-189-M. The major objective was to collect fine-resolution radar data with an ultra-wideband MCoRDS4 UHF/VHF radar depth sounder in conjunction with data from two microwave (Ku-band and Snow) radars and a Google Camera. This dataset includes reflection profiles for the three radars and ice surface and ice bottom picks for the radar depth sounder.	["POLYGON((163.884 -76.567,171.5583 -76.567,179.2326 -76.567,186.9069 -76.567,194.5812 -76.567,202.2555 -76.567,209.9298 -76.567,217.6041 -76.567,225.2784 -76.567,232.9527 -76.567,240.627 -76.567,240.627 -77.3847,240.627 -78.2024,240.627 -79.0201,240.627 -79.8378,240.627 -80.6555,240.627 -81.4732,240.627 -82.2909,240.627 -83.1086,240.627 -83.9263,240.627 -84.744,232.9527 -84.744,225.2784 -84.744,217.6041 -84.744,209.9298 -84.744,202.2555 -84.744,194.5812 -84.744,186.9069 -84.744,179.2326 -84.744,171.5583 -84.744,163.884 -84.744,163.884 -83.9263,163.884 -83.1086,163.884 -82.2909,163.884 -81.4732,163.884 -80.6555,163.884 -79.8378,163.884 -79.0201,163.884 -78.2024,163.884 -77.3847,163.884 -76.567))"]	["POINT(-157.7445 -80.6555)"]	false	false
King George and Livingston Islands: Velocities and Digital Elevation Model	1043649	2016-02-17	Osmanoglu, Batuhan; Hock, Regine	Contribution of Western Antarctic Peninsula glaciers to sea level rise: Separation of the dynamic and climatic components	The data contain the time series totals of SAR derived detrended surface velocities from Livingston Island, as well as GeoTiff files generated from intensity tracking of Synthetic Aperture Radar (SAR) imagery. The images include average annual velocity and ice thickness of King George Island, and average annual velocity, ice thickness, and a digital elevation model of Livingston Island.	["POINT(-61 -62.75)", "POINT(-57.5 -61.75)"]	["POINT(-61 -62.75)", "POINT(-57.5 -61.75)"]	false	false
Glacial-interglacial History of West Antarctic Nunataks and Site Reconnaissance for Subglacial Bedrock Sampling	1142162	2016-01-01	Stone, John	Glacial-interglacial History of West Antarctic Nunataks and Site Reconnaissance for Subglacial Bedrock Sampling	This award supports a reconnaissance geological and radar-sounding study of promising sites in West Antarctica for a future project to measure cosmogenic nuclides in subglacial bedrock. Field work will take place in the Whitmore Mountains, close to the WAIS divide, and on the Nash and Pirrit Hills, downflow from the divide in the Weddell Sea drainage. At each site geological indicators of higher (and lower) ice levels in the past will be mapped and evidence of subglacial erosion or its absence will be documented. Elevation transects of both glacial erratics and adjacent bedrock samples will be collected to establish the timing of recent deglaciation at the sites and provide a complement to similar measurements on material from depth transects obtained by future subglacial drilling. At each site, bedrock ridges will be traced into the subsurface with closely-spaced ice-penetrating radar surveys, using a combination of instruments and frequencies to obtain the highest possible surface detail. Collectively the results will define prospective sites for subglacial sampling, and maximize the potential information to be obtained from such samples in future studies. The intellectual merit of this project is that measurements of cosmogenic nuclides in subglacial bedrock hold promise for resolving the questions of whether the West Antarctic ice sheet collapsed completely in the past, whether it is prone to repeated large deglaciations, and if so, what is their magnitude and frequency. Such studies will require careful choice of targets, to locate sites where bedrock geology is favorable, cosmogenic nuclide records are likely to have been protected from subglacial erosion, and the local ice-surface response is indicative of large-scale ice sheet behavior. The broader impacts of this work include helping to determine whether subglacial surfaces in West Antarctica were ever exposed to cosmic rays, which will provide unambiguous evidence for or against a smaller ice sheet in the past. This is an important step towards establishing whether the WAIS is vulnerable to collapse in future, and will ultimately help to address uncertainty in forecasting sea level change. The results will also provide ground truth for models of ice-sheet dynamics and long-term ice sheet evolution, and will help researchers use these models to identify paleoclimate conditions responsible for WAIS deglaciation. The education and training of students (both undergraduate and graduate students) will play an important role in the project, which will involve Antarctic fieldwork, technically challenging labwork, data collection and interpretation, and communication of the outcome to scientists and the general public.	["POLYGON((-104.14 -81.07,-102.24 -81.07,-100.34 -81.07,-98.44 -81.07,-96.54 -81.07,-94.64 -81.07,-92.74 -81.07,-90.84 -81.07,-88.94 -81.07,-87.04 -81.07,-85.14 -81.07,-85.14 -81.207,-85.14 -81.344,-85.14 -81.481,-85.14 -81.618,-85.14 -81.755,-85.14 -81.892,-85.14 -82.029,-85.14 -82.166,-85.14 -82.303,-85.14 -82.44,-87.04 -82.44,-88.94 -82.44,-90.84 -82.44,-92.74 -82.44,-94.64 -82.44,-96.54 -82.44,-98.44 -82.44,-100.34 -82.44,-102.24 -82.44,-104.14 -82.44,-104.14 -82.303,-104.14 -82.166,-104.14 -82.029,-104.14 -81.892,-104.14 -81.755,-104.14 -81.618,-104.14 -81.481,-104.14 -81.344,-104.14 -81.207,-104.14 -81.07))"]	["POINT(-94.64 -81.755)"]	false	false
Annual Satellite Era Accumulation Patterns Over WAIS Divide: A Study Using Shallow Ice Cores, Near-Surface Radars and Satellites	0944653	2015-01-01	Forster, Richard	Collaborative Research: Annual satellite era accumulation patterns over WAIS Divide: A study using shallow ice cores, near-surface radars and satellites	This award supports a project to broaden the knowledge of annual accumulation patterns over the West Antarctic Ice Sheet by processing existing near-surface radar data taken on the US ITASE traverse in 2000 and by gathering and validating new ultra/super-high-frequency (UHF) radar images of near surface layers (to depths of ~15 m), expanding abilities to monitor recent annual accumulation patterns from point source ice cores to radar lines. Shallow (15 m) ice cores will be collected in conjunction with UHF radar images to confirm that radar echoed returns correspond with annual layers, and/or sub-annual density changes in the near-surface snow, as determined from ice core stable isotopes. This project will additionally improve accumulation monitoring from space-borne instruments by comparing the spatial-radar-derived-annual accumulation time series to the passive microwave time series dating back over 3 decades and covering most of Antarctica. The intellectual merit of this project is that mapping the spatial and temporal variations in accumulation rates over the Antarctic ice sheet is essential for understanding ice sheet responses to climate forcing. Antarctic precipitation rate is projected to increase up to 20% in the coming century from the predicted warming. Accumulation is a key component for determining ice sheet mass balance and, hence, sea level rise, yet our ability to measure annual accumulation variability over the past 5 decades (satellite era) is mostly limited to point-source ice cores. Developing a radar and ice core derived annual accumulation dataset will provide validation data for space-born remote sensing algorithms, climate models and, additionally, establish accumulation trends. The broader impacts of the project are that it will advance discovery and understanding within the climatology, glaciology and remote sensing communities by verifying the use of UHF radars to monitor annual layers as determined by visual, chemical and isotopic analysis from corresponding shallow ice cores and will provide a dataset of annual to near-annual accumulation measurements over the past ~5 decades across WAIS divide from existing radar data and proposed radar data. By determining if temporal changes in the passive microwave signal are correlated with temporal changes in accumulation will help assess the utility of passive microwave remote sensing to monitor accumulation rates over ice sheets for future decades. The project will promote teaching, training and learning, and increase representation of underrepresented groups by becoming involved in the NASA History of Winter project and Thermochron Mission and by providing K-12 teachers with training to monitor snow accumulation and temperature here in the US, linking polar research to the student's backyard. The project will train both undergraduate and graduate students in polar research and will encouraging young investigators to become involved in careers in science. In particular, two REU students will participate in original research projects as part of this larger project, from development of a hypothesis to presentation and publication of the results. The support of a new, young woman scientist will help to increase gender diversity in polar research.	["POLYGON((-119.4 -78.1,-118.46 -78.1,-117.52 -78.1,-116.58 -78.1,-115.64 -78.1,-114.7 -78.1,-113.76 -78.1,-112.82 -78.1,-111.88 -78.1,-110.94 -78.1,-110 -78.1,-110 -78.29,-110 -78.48,-110 -78.67,-110 -78.86,-110 -79.05,-110 -79.24,-110 -79.43,-110 -79.62,-110 -79.81,-110 -80,-110.94 -80,-111.88 -80,-112.82 -80,-113.76 -80,-114.7 -80,-115.64 -80,-116.58 -80,-117.52 -80,-118.46 -80,-119.4 -80,-119.4 -79.81,-119.4 -79.62,-119.4 -79.43,-119.4 -79.24,-119.4 -79.05,-119.4 -78.86,-119.4 -78.67,-119.4 -78.48,-119.4 -78.29,-119.4 -78.1))"]	["POINT(-114.7 -79.05)"]	false	false
Measurements of Trapped Air from Mullins Valley, Dry Valleys, Antarctica	0636731	2014-11-26	Bender, Michael; Yau, Audrey M.	Collaborative Research: Dating and Paleoenvironmental Studies on Ancient Ice in the Dry Valleys, Antarctica	These data describe the analyses of the elemental and isotopic composition of O2, N2, and Ar and total air content made on the trapped air from three shallow ice cores (<34m depth) collected during the 2009 field campaign to Mullins Valley of the Dry Valleys, Antarctica.	["POINT(160.35 -77.87)"]	["POINT(160.35 -77.87)"]	false	false
Radar Studies of Subglacial Lake Whillans and the Whillans Ice Stream Grounding Zone	0838855 0838854	2014-10-30	Jacobel, Robert	Collaborative Research: Integrative Study of Marine Ice Sheet Stability & Subglacial Life Habitats in W Antarctica - Lake & Ice Stream Subglacial Access Research Drilling (LISSARD)	This data set includes ground-based, gridded, ice-penetrating radar thickness and basal reflection power, along with GPS coordinates, for two areas of Whillans Ice Stream: Subglacial Lake Whillans and the Whillans Ice Stream grounding zone.	["POLYGON((-164 -84.2,-163 -84.2,-162 -84.2,-161 -84.2,-160 -84.2,-159 -84.2,-158 -84.2,-157 -84.2,-156 -84.2,-155 -84.2,-154 -84.2,-154 -84.21,-154 -84.22,-154 -84.23,-154 -84.24,-154 -84.25,-154 -84.26,-154 -84.27,-154 -84.28,-154 -84.29,-154 -84.3,-155 -84.3,-156 -84.3,-157 -84.3,-158 -84.3,-159 -84.3,-160 -84.3,-161 -84.3,-162 -84.3,-163 -84.3,-164 -84.3,-164 -84.29,-164 -84.28,-164 -84.27,-164 -84.26,-164 -84.25,-164 -84.24,-164 -84.23,-164 -84.22,-164 -84.21,-164 -84.2))"]	["POINT(-159 -84.25)"]	false	false
Are the Dry Valleys Getting Wetter? A Preliminary Assessment of Wetness Across the McMurdo Dry Valleys Landscape	1045215	2014-01-01	Gooseff, Michael N.	EAGER: Are the Dry Valleys Getting Wetter? A Preliminary Assessment of Wetness Across the McMurdo Dry Valleys Landscape	Intellectual Merit: Until recently, wetted soils in the Dry Valleys were generally only found adjacent to streams and lakes. Since the warm austral summer of 2002, numerous "wet spots" have been observed far from shorelines on relatively flat valley floor locations and as downslope fingers of flow on valley walls. The source of the water to wet these soils is unclear, as is the spatial and temporal pattern of occurrence from year to year. Their significance is potentially great as enhanced soil moisture may change the thermodynamics, hydrology, and erosion rate of surface soils, and facilitate transport of materials that had previously been stable. These changes to the soil active layer could significantly modify permafrost and ground ice stability within the Dry Valleys. The PIs seek to investigate these changes to address two competing hypotheses: that the source of water to these ?wet spots? is ground ice melt and that the source of this water is snowmelt. The PIs will document the spatiotemporal dynamics of these wet areas using high frequency remote sensing data from QuickBird and WorldView satellites to document the occurrence, dimensions, and growth of wet spots during the 2010-11 and 2011-12 austral summers. They will test their hypotheses by determining whether wet spots recur in the same locations in each season, and they will compare present to past distribution using archived imagery. They will also determine whether spatial snow accumulation patterns and temporal ablation patterns are coincident with wet spot formation. Broader impacts: One graduate student will be trained on this project. Findings will be reported at scientific meetings and published in peer reviewed journals. They will also develop a teaching module on remote sensing applications to hydrology for the Modular Curriculum for Hydrologic Advancement and an innovative prototype project designed to leverage public participation in mapping wet spots and snow patches across the Dry Valleys through the use of social media and mobile computing applications.	["POLYGON((160 -77.25,160.5 -77.25,161 -77.25,161.5 -77.25,162 -77.25,162.5 -77.25,163 -77.25,163.5 -77.25,164 -77.25,164.5 -77.25,165 -77.25,165 -77.375,165 -77.5,165 -77.625,165 -77.75,165 -77.875,165 -78,165 -78.125,165 -78.25,165 -78.375,165 -78.5,164.5 -78.5,164 -78.5,163.5 -78.5,163 -78.5,162.5 -78.5,162 -78.5,161.5 -78.5,161 -78.5,160.5 -78.5,160 -78.5,160 -78.375,160 -78.25,160 -78.125,160 -78,160 -77.875,160 -77.75,160 -77.625,160 -77.5,160 -77.375,160 -77.25))"]	["POINT(162.5 -77.875)"]	false	false
Ocean-Ice Interaction in the Amundsen Sea Sector of West Antarctica	0732804	2014-01-01	McPhee, Miles G.	Collaborative Research; IPY: Ocean-Ice Interaction in the Amundsen Sea sector of West Antarctica	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. Broader 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 'Multidisciplinary Study of the Amundsen Sea Embayment' 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 'Polar Palooza' 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.	["POINT(166.25 -77.42)"]	["POINT(166.25 -77.42)"]	false	false
Subglacial water flow paths under Thwaites Glacier, West Antarctica	0636724	2012-05-21	Carter, Sasha P.; Young, Duncan A.; Blankenship, Donald D.	Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System	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. Data are available via FTP.	["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))"]	["POINT(-105 -77.5)"]	false	false
AGASEA Ice Thickness Profile Data from the Amundsen Sea Embayment, Antarctica	0636724	2012-05-03	Blankenship, Donald D.; Young, Duncan A.; Holt, John W.; Kempf, Scott D.	Collaborative Research: Synthesis of Thwaites Glacier Dynamics: Diagnostic and Prognostic Sensitivity Studies of a West Antarctic Outlet System	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. Data are available via FTP in space-delimited ASCII format.	["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))"]	["POINT(-107.5 -78)"]	false	false
GPS-Measured Ice Velocities and Strain Data from the Ross and Amundsen Sea Ice Flow Divide, West Antarctica	0440847	2011-09-01	Matsuoka, Kenichi; Power, Donovan; Rasmussen, Al	Detection of Crystal Orientation Fabrics near the Ross/Amundsen Sea Ice-flow Divide and at the Siple Dome Ice Core Site using Polarimetric Radar Methods	This data set includes ice flow velocities and strain configurations, from GPS measurements on the West Antarctic Ice Sheet (WAIS) Divide. Ninety markers installed in the firn were measured during two consecutive field seasons running from 2005-2006 and 2006-2007. The markers were located in 150 by 60 km area, with smaller clusters of five markers located within about 10 km of each other. Consecutive GPS measurements were used to derive velocity for each marker. Strain configurations were estimated by differentiating a linear fit of the data at each marker cluster. Data are available via FTP as ASCII text (.txt ) files in comma separated value format.	["POLYGON((-115.457 -78.7489,-114.8241 -78.7489,-114.1912 -78.7489,-113.5583 -78.7489,-112.9254 -78.7489,-112.2925 -78.7489,-111.6596 -78.7489,-111.0267 -78.7489,-110.3938 -78.7489,-109.7609 -78.7489,-109.128 -78.7489,-109.128 -78.83802,-109.128 -78.92714,-109.128 -79.01626,-109.128 -79.10538,-109.128 -79.1945,-109.128 -79.28362,-109.128 -79.37274,-109.128 -79.46186,-109.128 -79.55098,-109.128 -79.6401,-109.7609 -79.6401,-110.3938 -79.6401,-111.0267 -79.6401,-111.6596 -79.6401,-112.2925 -79.6401,-112.9254 -79.6401,-113.5583 -79.6401,-114.1912 -79.6401,-114.8241 -79.6401,-115.457 -79.6401,-115.457 -79.55098,-115.457 -79.46186,-115.457 -79.37274,-115.457 -79.28362,-115.457 -79.1945,-115.457 -79.10538,-115.457 -79.01626,-115.457 -78.92714,-115.457 -78.83802,-115.457 -78.7489))"]	["POINT(-112.2925 -79.1945)"]	false	false
Polarimetric Radar Data from the Ross and Amundsen Sea Ice Flow Divide, West Antarctica	0440847	2011-08-30	Matsuoka, Kenichi; Power, Donovan; Fujita, Shuji; Raymond, Charles	Detection of Crystal Orientation Fabrics near the Ross/Amundsen Sea Ice-flow Divide and at the Siple Dome Ice Core Site using Polarimetric Radar Methods	This dataset contains ground-based, co-polarized radar data collected using pulse-modulated 60 MHz and 179 MHz radar at 19 sites around a deep ice coring site near the Ross and Amundsen flow divide of West Antarctic Ice Sheet (WAIS Divide). At each site, the radar data were collected at 12 orientations of the radar polarization plane for three radar pulse widths: 250 nsec, 500 nsec, and 1000 nsec. Useful signals were received from depths roughly between 200 m and 2000 m. Ice flow velocities and strain configurations were measured at most of these radar survey sites, and these ice motion data are also provided at NSIDC (GPS-Measured Ice Velocities and Strain Data from the Ross and Amundsen Sea Ice Flow Divide, West Antarctica). Data are available via FTP in MATLAB (.mat) format.	["POLYGON((-115.457 -78.7489,-114.8241 -78.7489,-114.1912 -78.7489,-113.5583 -78.7489,-112.9254 -78.7489,-112.2925 -78.7489,-111.6596 -78.7489,-111.0267 -78.7489,-110.3938 -78.7489,-109.7609 -78.7489,-109.128 -78.7489,-109.128 -78.83802,-109.128 -78.92714,-109.128 -79.01626,-109.128 -79.10538,-109.128 -79.1945,-109.128 -79.28362,-109.128 -79.37274,-109.128 -79.46186,-109.128 -79.55098,-109.128 -79.6401,-109.7609 -79.6401,-110.3938 -79.6401,-111.0267 -79.6401,-111.6596 -79.6401,-112.2925 -79.6401,-112.9254 -79.6401,-113.5583 -79.6401,-114.1912 -79.6401,-114.8241 -79.6401,-115.457 -79.6401,-115.457 -79.55098,-115.457 -79.46186,-115.457 -79.37274,-115.457 -79.28362,-115.457 -79.1945,-115.457 -79.10538,-115.457 -79.01626,-115.457 -78.92714,-115.457 -78.83802,-115.457 -78.7489))"]	["POINT(-112.2925 -79.1945)"]	false	false
Modeled Radar Attenuation Rate Profile at the Vostok 5G Ice Core Site, Antarctica	0538674	2011-08-15	Macgregor, Joseph A.; Matsuoka, Kenichi; Studinger, Michael S.	Collaborative Research: Deciphering the Deep Ice and the Ice-water Interface over Lake Vostok Using Existing Radar Data	This data set provides a modeled radar attenuation rate profile, showing the predicted contributions from pure ice and impurities to radar attenuation at the Vostok 5G ice core site in Antarctica, as well as the total attenuation rate and its formal uncertainty. The model data are based on borehole temperature logs, concentrations of major soluble ions measured from melted ice core samples, and information about the electrical conductivity of ice. Attenuation rates and their spatial variability are important constraints for radar studies of ice sheets. Parameters include depth, total attenuation rate, and attenuation rate contribution from pure ice, acidity, and salinity. Data are available via FTP as a text file (.txt) with columns in comma separated value format.	["POINT(73.17 -78.47)"]	["POINT(73.17 -78.47)"]	false	false
Millennially Averaged Accumulation Rates for Lake Vostok	0538674	2011-08-01	Macgregor, Joseph A.; Matsuoka, Kenichi; Studinger, Michael S.; Waddington, Edwin D.; Winebrenner, Dale	Collaborative Research: Deciphering the Deep Ice and the Ice-water Interface over Lake Vostok Using Existing Radar Data	This data set consists of inferred accumulation rates from three radar layers (26, 35 and 41 thousand years old) in the Vostok Subglacial Lake region. Accumulation rates were inferred using Local-Layer Approximation (LLA), which assumes that the strain-rate history of a particle traveling through the ice sheet can be approximated by the vertical strain-rate profile at the current position of the particle, which the researchers assume to be uniform. Parameters include location, in latitude and longitude, polar stereographic coordinates, and local grid X and Y coordinates, along with layer age, in thousands of years (ka), and inferred accumulation rate (cm/a). The data cover a 150 by 350 km area. Data are available via FTP, as a text file (.txt) with columns in comma separated value format.	["POLYGON((68.4 -75.7,69.61 -75.7,70.82 -75.7,72.03 -75.7,73.24 -75.7,74.45 -75.7,75.66 -75.7,76.87 -75.7,78.08 -75.7,79.29 -75.7,80.5 -75.7,80.5 -76.04,80.5 -76.38,80.5 -76.72,80.5 -77.06,80.5 -77.4,80.5 -77.74,80.5 -78.08,80.5 -78.42,80.5 -78.76,80.5 -79.1,79.29 -79.1,78.08 -79.1,76.87 -79.1,75.66 -79.1,74.45 -79.1,73.24 -79.1,72.03 -79.1,70.82 -79.1,69.61 -79.1,68.4 -79.1,68.4 -78.76,68.4 -78.42,68.4 -78.08,68.4 -77.74,68.4 -77.4,68.4 -77.06,68.4 -76.72,68.4 -76.38,68.4 -76.04,68.4 -75.7))"]	["POINT(74.45 -77.4)"]	false	false
Large- and Small-scale Dynamics and Meteor Studies in the MLT with a New-generation Meteor Radar on King George Island	0839084	2011-01-01	Fritts, David; Janches, Diego	Large- and Small-scale Dynamics and Meteor Studies in the MLT with a New-generation Meteor Radar on King George Island	The project will employ a sophisticated meteor radar at the Brazilian Antarctic station Comandante Ferraz on King George Island for a number of synergetic research efforts of high interest to the international aeronomical community. The location of the radar will be at the tip of the Antarctic Peninsula - at a critical southern latitude of 62 degrees - to fill a current measurement gap from 54 to 68 degrees south. The radar will play a key role in Antarctic and inter-hemispheric studies of neutral atmosphere dynamics, defining global mesosphere and lower thermosphere structure and variability (from 80 to 105 km) and guiding advances of models accounting for the dynamics of this high-altitude region, including general circulation models, and climate and numerical weather prediction models. The unique radar measurement sensitivity will enable studies of: (1) the large-scale circulation and planetary waves, (2) the tidal structure and variability, (3) the momentum transport by small-scale gravity waves, (4) important, but unquantified, gravity wave - tidal interactions, (5) polar mesosphere summer echoes, and (6) meteor fluxes, head echoes, and non-specular trails, a number of which exhibit high latitudinal gradients at these latitudes. This radar will support extensive collaborations with U.S. and other scientists making measurements at other Antarctic and Arctic conjugate sites, including Brazilian scientists at C. Ferraz and U.S. and international colleagues having other instrumentation in the Antarctic, Arctic, and within South America. Links to the University of Colorado in the U.S., Instituto Nacional de Pesquisas Espaciais (INPE) in Brazil and Universidad Nacional de La Plata in Argentina will provide unique research opportunities for graduate and undergraduate students in the U.S. and South America.	["POLYGON((-63 -59,-62 -59,-61 -59,-60 -59,-59 -59,-58 -59,-57 -59,-56 -59,-55 -59,-54 -59,-53 -59,-53 -59.6,-53 -60.2,-53 -60.8,-53 -61.4,-53 -62,-53 -62.6,-53 -63.2,-53 -63.8,-53 -64.4,-53 -65,-54 -65,-55 -65,-56 -65,-57 -65,-58 -65,-59 -65,-60 -65,-61 -65,-62 -65,-63 -65,-63 -64.4,-63 -63.8,-63 -63.2,-63 -62.6,-63 -62,-63 -61.4,-63 -60.8,-63 -60.2,-63 -59.6,-63 -59))"]	["POINT(-58 -62)"]	false	false
Radar Studies of Internal Stratigraphy and Bed Topography along the US ITASE-II Traverse	0337567	2010-10-20	Jacobel, Robert	Collaborative Research: Is Ice Stream C Restarting? Glaciological Investigations of the 'Bulge' and the Trunk of Ice Stream C, West Antartica	This data set contains ice penetrating radar data from the US-International Trans-Antarctic Science Expedition (ITASE) Traverse, from Taylor Dome to South Pole recorded by the St. Olaf College deep radar system. Parameters include latitude, longitude, distance along profile (m), ice thickness pick (m), surface elevation (m), and bed echo power (relative units) from the approximately 1800 km traverse recorded during the 2006-2007 and 2007-2008 Antarctic field seasons (austral summer). The traverse has been broken into three segments, which are shown on three maps provided with the data. A sample radar profile covering approximately 120 km of the traverse near Titan Dome is also provided. Data are available via FTP as ASCII text files (.txt). Profile location maps and sample profile sections are available as Joint Photographic Experts Group (.jpg) image files.	["POLYGON((130 -78,133 -78,136 -78,139 -78,142 -78,145 -78,148 -78,151 -78,154 -78,157 -78,160 -78,160 -79.2,160 -80.4,160 -81.6,160 -82.8,160 -84,160 -85.2,160 -86.4,160 -87.6,160 -88.8,160 -90,157 -90,154 -90,151 -90,148 -90,145 -90,142 -90,139 -90,136 -90,133 -90,130 -90,130 -88.8,130 -87.6,130 -86.4,130 -85.2,130 -84,130 -82.8,130 -81.6,130 -80.4,130 -79.2,130 -78))"]	["POINT(145 -84)"]	false	false
Histories of Accumulation, Thickness, and WAIS Divide Location, Antarctica	0440666	2010-06-20	Waddington, Edwin D.; Koutnik, Michelle	Histories of accumulation, thickness and WAIS Divide location from radar layers using a new inverse approach	This data set contains radar internal layer and ice sheet topography data for two sites in Antarctica, along with associated model results from two studies. This project used geophysical inverse theory and a 2.5 D flowband ice-flow forward model to extract robust transient accumulation patterns from multiple deeper layers. Histories of divide migration, or the movement of the ice sheet and ice-surface evolution are also provided. The data used to solve the inverse problem, and the model solutions are provided. Internal layers, modern ice-surface velocities, and modern ice-sheet geometry at Taylor Mouth are available, as well as the pattern of accumulation inferred by Waddington et al. (2007). Data are available via FTP in Matlab (.mat) format. Supporting information is available as text files (.rtf and .txt).	["POINT(-111.816667 -79.416667)", "POINT(158.716667 -77.783333)"]	["POINT(-111.816667 -79.416667)", "POINT(158.716667 -77.783333)"]	false	false
Englacial Layers and Attenuation Rates across the Ross and Amundsen Sea Ice-Flow Divide (WAIS Divide), West Antarctica	0338151	2010-06-15	Raymond, Charles; Matsuoka, Kenichi	Glaciological Characteristics of the Ross/Amundsen Sea Ice-flow Divide Deduced by a New Analysis of Ice-penetrating Radar Data	This data set contains the results of a model study of spatial variations of ice temperature and subglacial conditions using available ice-penetrating radar data around a future deep ice coring site near the Ross and Amundsen flow divide of West Antarctic Ice Sheet. The model data are based on radar data collected by the Support Office of Aerogeophysical Research (SOAR) at the University of Texas, and the University of Washington, in 2000. The data include values for attenuation estimates for individual radar profiles. Data are available via FTP in MATLAB (.mat) and Portable Document (.pdf) formats.	["POINT(-112.09 -79.47)"]	["POINT(-112.09 -79.47)"]	false	false
Ice Flow History of the Thwaites Glacier, West Antarctica	0739372	2010-05-01	Conway, Howard; Fudge, T. J.; Catania, Ginny	Collaborative Research: Ice-flow history of the Thwaites Glacier, West Antarctica	This data set contains past flow lines of Thwaites Glacier. The flow lines were identified using layer patterns tracked between parallel radar layers, from a radar profile of the Thwaites Glacier catchment. The radar data was run and processed by the University of Texas Institute for Geophysics. The flow lines were identified from distinct layer patterns tracked between parallel radar layers. Data are available via FTP in ASCII text (.txt) format.	["POLYGON((-123 -76,-120.65 -76,-118.3 -76,-115.95 -76,-113.6 -76,-111.25 -76,-108.9 -76,-106.55 -76,-104.2 -76,-101.85 -76,-99.5 -76,-99.5 -76.37,-99.5 -76.74,-99.5 -77.11,-99.5 -77.48,-99.5 -77.85,-99.5 -78.22,-99.5 -78.59,-99.5 -78.96,-99.5 -79.33,-99.5 -79.7,-101.85 -79.7,-104.2 -79.7,-106.55 -79.7,-108.9 -79.7,-111.25 -79.7,-113.6 -79.7,-115.95 -79.7,-118.3 -79.7,-120.65 -79.7,-123 -79.7,-123 -79.33,-123 -78.96,-123 -78.59,-123 -78.22,-123 -77.85,-123 -77.48,-123 -77.11,-123 -76.74,-123 -76.37,-123 -76))"]	["POINT(-111.25 -77.85)"]	false	false
Ice-Penetrating Radar Data Across Siple Coast Grounding Lines	0538120	2010-01-01	Hulbe, Christina; Catania, Ginny	Collaborative Research: Grounding Line Forensics: The History of Grounding Line Retreat in the Kamb Ice Stream Outlet Region	These data consist of ice-penetrating radar data collected on the ground across the grounding line near Siple Dome during the 2006 and 2007 Antarctic summer field seasons. Primarily, the data consist of low-frequency radar data (2 MHz, approximately 50 meter resolution) in order to observe deep internal layers and the ice-bed interface. The data set also contains one file with high-frequency (100 MHz, approximately 1 meter resolution) radar data, for a sub-region of one of the low-frequency radar profiles. Coincident kinematic GPS data were also collected to correct the radar data for topography along each profile. Radar profiles are typically approximately 20 km in length with the grounding line crossed centrally where possible. Data are available via FTP in Matlab (.mat) format.	["POLYGON((-160 -81,-158.5 -81,-157 -81,-155.5 -81,-154 -81,-152.5 -81,-151 -81,-149.5 -81,-148 -81,-146.5 -81,-145 -81,-145 -81.2,-145 -81.4,-145 -81.6,-145 -81.8,-145 -82,-145 -82.2,-145 -82.4,-145 -82.6,-145 -82.8,-145 -83,-146.5 -83,-148 -83,-149.5 -83,-151 -83,-152.5 -83,-154 -83,-155.5 -83,-157 -83,-158.5 -83,-160 -83,-160 -82.8,-160 -82.6,-160 -82.4,-160 -82.2,-160 -82,-160 -81.8,-160 -81.6,-160 -81.4,-160 -81.2,-160 -81))"]	["POINT(-152.5 -82)"]	false	false
Antarctic Radar Echograms and Derived Ice Thickness Data from CReSIS	0122520	2009-07-01	Gogineni, Prasad	ITR/SI+AP: A Mobile Sensor Web for Polar Ice Sheet Measurements	The Center for Remote Sensing of Ice Sheets (CReSIS) data from the 2002 and 2006 Flight missions. Basic Processing has been done to obtain the radar echograms and derived ice thickness data. Algorithms are being developed to reduce the multiples to obtain accurate measurement of ice sheet thickness over some areas. Data are available in Matlab (.mat) and Adobe .pdf formats.	["POLYGON((-110 -62,-105 -62,-100 -62,-95 -62,-90 -62,-85 -62,-80 -62,-75 -62,-70 -62,-65 -62,-60 -62,-60 -63.5,-60 -65,-60 -66.5,-60 -68,-60 -69.5,-60 -71,-60 -72.5,-60 -74,-60 -75.5,-60 -77,-65 -77,-70 -77,-75 -77,-80 -77,-85 -77,-90 -77,-95 -77,-100 -77,-105 -77,-110 -77,-110 -75.5,-110 -74,-110 -72.5,-110 -71,-110 -69.5,-110 -68,-110 -66.5,-110 -65,-110 -63.5,-110 -62))"]	["POINT(-85 -69.5)"]	false	false
Glaciological Investigations of the Bulge and Trunk of Kamb Ice Stream, West Antarctica	0337567	2009-03-26	Jacobel, Robert	Collaborative Research: Is Ice Stream C Restarting? Glaciological Investigations of the 'Bulge' and the Trunk of Ice Stream C, West Antartica	This data set contains radar data from the Kamb Ice Stream (KIS), formerly known as Ice Stream C, in West Antarctica. The project was part of a larger study to assess the likelihood of ice stream reactivation. Parameters include latitude, longitude, distance along profile, ice thickness pick, bright layer depth, and surface elevation, from approximately 1600 km of ground-based radar traverses recorded during the 2004 and 2005 Antarctic field seasons. Data are available via FTP as ASCII text files (.txt). Profile location maps and sample profile sections are available as Joint Photographic Experts Group (.jpg) image files. The data are also available as binary data on DVD, upon request.	["POLYGON((-140 -82,-139 -82,-138 -82,-137 -82,-136 -82,-135 -82,-134 -82,-133 -82,-132 -82,-131 -82,-130 -82,-130 -82.1,-130 -82.2,-130 -82.3,-130 -82.4,-130 -82.5,-130 -82.6,-130 -82.7,-130 -82.8,-130 -82.9,-130 -83,-131 -83,-132 -83,-133 -83,-134 -83,-135 -83,-136 -83,-137 -83,-138 -83,-139 -83,-140 -83,-140 -82.9,-140 -82.8,-140 -82.7,-140 -82.6,-140 -82.5,-140 -82.4,-140 -82.3,-140 -82.2,-140 -82.1,-140 -82))"]	["POINT(-135 -82.5)"]	false	false
Antarctic Subglacial Lake Classification Inventory	9319379 9911617	2009-02-06	Blankenship, Donald D.; Holt, John W.; Carter, Sasha P.	Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR)	This data set is an Antarctic radar-based subglacial lake classification collection, which focuses on the radar reflection properties of each given lake. The 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). Source 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).	["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))"]	["POINT(-72.5 -80)"]	false	false
Correlative Antarctic and Inter-Hemispheric Dynamics Studies Using the MF Radar at Rothera	0438777	2009-01-01	Fritts, David	Correlative Antarctic and Inter-Hemispheric Dynamics Studies Using the MF Radar at Rothera	This proposal is to continue operation and scientific studies with the middle-frequency (MF, 1-30 MHz) mesospheric radar deployed at the British Antarctic station Rothera in 1996. This system is now a key site in the Antarctic MF radar chain near 68 deg. S, which includes also MF radars at Syowa (Japan) and Davis (Australia) stations. This radar comprises the winds component of a developing instrument suite for the mesosphere-thermosphere (MLT) studies at Rothera - a focus of the new BAS 5-year plan, which also includes the Fe temperature lidar (formerly at South Pole) and the mesopause airglow imager for gravity wave studies (formerly at Halley). The Rothera MF radar has just had its antennas and electronics upgraded to achieve better signal-to-noise ratio and more continuous measurements in height and time. The main focus of the proposed research is to extend the knowledge of the polar mesosphere dynamics. The instrument suite at Rothera is ideally positioned for correlative interhemispheric studies with northern hemisphere sites at Poker Flat, Alaska (65 deg. N) and ALOMAR, Norway (69 deg. N) having comparable instrumentation. Further research efforts performed with continued funding will focus on: (1) multi-instrument collaborative studies at Rothera to quantify as fully as possible the dynamics, structure, and variability of the MLT at that location, (2) multi-site (and multi-instrument) studies of large-scale dynamics and variability in the Antarctic (together with the radars and other instrumentation at Davis and Syowa), and (3) interhemispheric studies employing instruments (e.g., the Na resonance lidar and MF radar) at Poker Flat and ALOMAR. It is expected that these studies will lead to a more detailed understanding of (1) mean, tidal, and planetary wave structures at polar latitudes, (2) seasonal, inter-annual, and short-term variability of these structures, (3) hemispheric differences in the tidal and planetary wave structures arising from different source and wave interaction conditions, and (4) the relative influences of gravity waves in the two hemispheres. Such studies will also contribute more generally to an increased awareness of the role of high-latitude processes in global atmospheric dynamics and variability.	["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))"]	["POINT(0 -89.999)"]	false	false
Radar Investigations of Antarctic Ice Stream Margins, Siple Dome, 1998	9725882	2007-07-06	Nereson, Nadine A.; Raymond, Charles	Internal Stratigraphy and Basal Conditions at the Margins ofActive Ice Streams of the Siple Coast, Antarctica	This data set consists of surface-based radar measurements, including geometry of the bed, surface, and internal layers, and bed reflectivity measurements at two sites along ice stream margins at Siple Dome, Antarctica. The research is a radar examination of bed reflection characteristics and internal layer geometry in two inter-ice-stream ridges, the Shabtaie Ridge (Ridge D/E) and the Engelhardt Ridge (Ridge B/C), and across margins with the adjacent ice streams, the MacAyeal Ice Stream (Ice Stream E) and the Whillans Ice Stream (Ice Stream B). Investigators collected these radar data from 14 November through 13 December 1998. Data are in Microsoft Word, PDF, ASCII text, MATLAB, binary, and various image formats. Investigators have also provided code for MATLAB routines that they used to view the radar data. Data are available via FTP.	["POLYGON((-141.6722 -80.1678,-141.34195 -80.1678,-141.0117 -80.1678,-140.68145 -80.1678,-140.3512 -80.1678,-140.02095 -80.1678,-139.6907 -80.1678,-139.36045 -80.1678,-139.0302 -80.1678,-138.69995 -80.1678,-138.3697 -80.1678,-138.3697 -80.4863,-138.3697 -80.8048,-138.3697 -81.1233,-138.3697 -81.4418,-138.3697 -81.7603,-138.3697 -82.0788,-138.3697 -82.3973,-138.3697 -82.7158,-138.3697 -83.0343,-138.3697 -83.3528,-138.69995 -83.3528,-139.0302 -83.3528,-139.36045 -83.3528,-139.6907 -83.3528,-140.02095 -83.3528,-140.3512 -83.3528,-140.68145 -83.3528,-141.0117 -83.3528,-141.34195 -83.3528,-141.6722 -83.3528,-141.6722 -83.0343,-141.6722 -82.7158,-141.6722 -82.3973,-141.6722 -82.0788,-141.6722 -81.7603,-141.6722 -81.4418,-141.6722 -81.1233,-141.6722 -80.8048,-141.6722 -80.4863,-141.6722 -80.1678))"]	["POINT(-140.02095 -81.7603)"]	false	false
Subglacial Topography: Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica	0230197	2006-10-25	Holt, John W.; Blankenship, Donald D.; Morse, David L.; Vaughan, David G.; Corr, Hugh F. J.; Young, Duncan A.	Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica (AGASEA)	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). The 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. These data are available via FTP.	["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))"]	["POINT(-109.7 -76.7)"]	false	false
GPR and GPS Data: Characteristics of Snow Megadunes and their Potential Effects on Ice Core Interpretation	0125276	2006-06-10	Scambos, Ted; Bauer, Rob	Collaborative Research: Characteristics of Snow Megadunes and Their Potential Effect on Ice Core Interpretation	The Antarctic megadune research was conducted during two field seasons, one in November 2002 and the other in December 2003 through January 2004. The megadune field site is located on the East Antarctic Plateau, southeast of Vostok station. The objectives of this multi-facetted research are to determine the physical characteristics of the firn across the dunes including typical climate indicators such as stable isotopes and major chemical species and to install instruments to measure the time variation of near-surface wind and temperature with depth, to test and refine hypotheses for megadune formation. It is important to improve our current understanding of the megadunes because of their extreme nature, their broad extent, and their potential impact on the climate record. Megadunes are a manifestation of an extreme terrestrial climate and may provide insight on past terrestrial climate or on processes active on other planets. Snow megadunes are undulating variations in accumulation and surface texture with wavelengths of 2 to 5 km and amplitudes up to 5 meters. The features cover 500,000 km<sup>2</sup> of the East Antarctic plateau, occurring in areas of moderate regional slope and low accumulation on the flanks of the ice sheet between 2500 and 3800 meters elevation. Landsat images and aerial photography indicate the dunes consist of alternating surfaces of glaze and rough sastrugi, with gradational boundaries. This pattern is oriented perpendicular to the mean wind direction, as modeled in katabatic wind studies. Glaze surfaces cover the leeward faces and troughs; rough sastrugi cover the windward faces and crests. The megadune pattern is crossed by smooth to eroded wind-parallel longitudinal dunes. Wind-eroded longitudinal dunes form spectacular 1-meter-high sastrugi in nearby areas. This data set contains ground penetrating radar (GPR) data showing surface morphology and internal layering structure along with global positioning system (GPS) data collected within an area of 60 km<sup>2</sup>. GPS data are provided in space-delimited ASCII text Microsoft Excel formats, while GPR data are in JPEG format. Data are available via FTP.	["POLYGON((124.0218 -80.5304,124.22264 -80.5304,124.42348 -80.5304,124.62432 -80.5304,124.82516 -80.5304,125.026 -80.5304,125.22684 -80.5304,125.42768 -80.5304,125.62852 -80.5304,125.82936 -80.5304,126.0302 -80.5304,126.0302 -80.55538,126.0302 -80.58036,126.0302 -80.60534,126.0302 -80.63032,126.0302 -80.6553,126.0302 -80.68028,126.0302 -80.70526,126.0302 -80.73024,126.0302 -80.75522,126.0302 -80.7802,125.82936 -80.7802,125.62852 -80.7802,125.42768 -80.7802,125.22684 -80.7802,125.026 -80.7802,124.82516 -80.7802,124.62432 -80.7802,124.42348 -80.7802,124.22264 -80.7802,124.0218 -80.7802,124.0218 -80.75522,124.0218 -80.73024,124.0218 -80.70526,124.0218 -80.68028,124.0218 -80.6553,124.0218 -80.63032,124.0218 -80.60534,124.0218 -80.58036,124.0218 -80.55538,124.0218 -80.5304))"]	["POINT(125.026 -80.6553)"]	false	false
Compilation of Antarctic Radar Data, Siple Coast, 2000-2002	9909518	2005-12-15	Raymond, Charles; Conway, Howard; Catania, Ginny	Collaborative Research:History and Evolution of the Siple Coast Ice Stream Systems as Recorded by Former Shear-Margin Scars	These data consist of ground-based, ice-penetrating radar profiles across satellite-detected lineations and terrains that were taken in the lower reaches of Ross Ice Stream C, also known as the Kamb Ice Stream (KIS); on Roosevelt Island; on the Siple Dome; and on the Shabtaie Ice Ridge.	["POLYGON((-158 -81,-155.6 -81,-153.2 -81,-150.8 -81,-148.4 -81,-146 -81,-143.6 -81,-141.2 -81,-138.8 -81,-136.4 -81,-134 -81,-134 -81.3,-134 -81.6,-134 -81.9,-134 -82.2,-134 -82.5,-134 -82.8,-134 -83.1,-134 -83.4,-134 -83.7,-134 -84,-136.4 -84,-138.8 -84,-141.2 -84,-143.6 -84,-146 -84,-148.4 -84,-150.8 -84,-153.2 -84,-155.6 -84,-158 -84,-158 -83.7,-158 -83.4,-158 -83.1,-158 -82.8,-158 -82.5,-158 -82.2,-158 -81.9,-158 -81.6,-158 -81.3,-158 -81))"]	["POINT(-146 -82.5)"]	false	false
US International Trans-Antarctic Scientific Expedition 400 MHz Subsurface Radar Profiles	0088035	2005-05-01	Arcone, Steven	High Resolution Radar Profiling of the Snow and Ice Stratigraphy beneath the ITASE Traverses, West Antarctic Ice Sheet	This data set includes data from radar profiles that were recorded between core sites during the November-December seasons for 1999-2002. Data were collected using an ice-penetrating radar to survey the ice sheet. Ice thickness data are available for a portion of the West Antarctic Ice Sheet. This study is part of the U.S. participation in the International Trans-Antarctic Scientific Expedition (US ITASE). Elevation data are available in Excel and Microsoft Access database format.	["POLYGON((-135 -75,-130.5 -75,-126 -75,-121.5 -75,-117 -75,-112.5 -75,-108 -75,-103.5 -75,-99 -75,-94.5 -75,-90 -75,-90 -76.5,-90 -78,-90 -79.5,-90 -81,-90 -82.5,-90 -84,-90 -85.5,-90 -87,-90 -88.5,-90 -90,-94.5 -90,-99 -90,-103.5 -90,-108 -90,-112.5 -90,-117 -90,-121.5 -90,-126 -90,-130.5 -90,-135 -90,-135 -88.5,-135 -87,-135 -85.5,-135 -84,-135 -82.5,-135 -81,-135 -79.5,-135 -78,-135 -76.5,-135 -75))"]	["POINT(-112.5 -82.5)"]	false	false
Ice Thickness and Internal Layer Depth Along the 2001 and 2002 US ITASE Traverses	9814574	2005-04-08	Jacobel, Robert	Radar Studies of Internal Stratigraphy and Bedrock Topography along the US ITASE Traverse	Ice thickness and internal layer depth data were collected with a ground-based, ice-penetrating radar study as part of the US International Trans-Antarctic Scientific Expedition (US ITASE) traverse in West Antarctica from 01 November 2001 to 10 January 2003. Longitude, latitude, ice thickness, and depth to a prominent internal reflector were collected at approximately 12 m intervals. Ice thickness values are reported for approximately 90% of the traverse, and internal layer depth values are reported for approximately 80% of the traverse. Data are avaialble in ASCII and JPEG formats via FTP.	["POLYGON((-120 -80,-115.6 -80,-111.2 -80,-106.8 -80,-102.4 -80,-98 -80,-93.6 -80,-89.2 -80,-84.8 -80,-80.4 -80,-76 -80,-76 -81,-76 -82,-76 -83,-76 -84,-76 -85,-76 -86,-76 -87,-76 -88,-76 -89,-76 -90,-80.4 -90,-84.8 -90,-89.2 -90,-93.6 -90,-98 -90,-102.4 -90,-106.8 -90,-111.2 -90,-115.6 -90,-120 -90,-120 -89,-120 -88,-120 -87,-120 -86,-120 -85,-120 -84,-120 -83,-120 -82,-120 -81,-120 -80))"]	["POINT(-98 -85)"]	false	false
US International Trans-Antarctic Scientific Expedition (US ITASE): GPR Profiles and Accumulation Mapping	0096299 0229573 0196441 0088035	2005-04-06	Spikes, Vandy Blue; Hamilton, Gordon S.; Mayewski, Paul A.; Arcone, Steven; Kaspari, Susan	High Resolution Radar Profiling of the Snow and Ice Stratigraphy beneath the ITASE Traverses, West Antarctic Ice Sheet	Snow accumulation rates typically show high variability over short distances. This data set contains accumulation rates derived from ground-penetrating radar (GPR) used to detect isochronal layers in the firn in West Antarctica. These layers were then dated using results from ice core analyses. These data show that accumulation rates along this profile have decreased in recent decades. The radar profile extends between two ice core sites taken along one of the US-ITASE traverse routes.	["POLYGON((-123.993 -77.6832,-123.6019 -77.6832,-123.2108 -77.6832,-122.8197 -77.6832,-122.4286 -77.6832,-122.0375 -77.6832,-121.6464 -77.6832,-121.2553 -77.6832,-120.8642 -77.6832,-120.4731 -77.6832,-120.082 -77.6832,-120.082 -77.7232,-120.082 -77.7632,-120.082 -77.8032,-120.082 -77.8432,-120.082 -77.8832,-120.082 -77.9232,-120.082 -77.9632,-120.082 -78.0032,-120.082 -78.0432,-120.082 -78.0832,-120.4731 -78.0832,-120.8642 -78.0832,-121.2553 -78.0832,-121.6464 -78.0832,-122.0375 -78.0832,-122.4286 -78.0832,-122.8197 -78.0832,-123.2108 -78.0832,-123.6019 -78.0832,-123.993 -78.0832,-123.993 -78.0432,-123.993 -78.0032,-123.993 -77.9632,-123.993 -77.9232,-123.993 -77.8832,-123.993 -77.8432,-123.993 -77.8032,-123.993 -77.7632,-123.993 -77.7232,-123.993 -77.6832))"]	["POINT(-122.0375 -77.8832)"]	false	false
Antarctic Aerogeophysics Data	9319369 9120464 9319379 9911617	2004-07-13	Blankenship, Donald D.; Morse, David L.; Holt, John W.; Dalziel, Ian W.	Continuation of Activities for the Support Office for Aerogeophysical Research (SOAR)	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. The 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. SOAR 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.	["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))"]	["POINT(-180 -71.865)"]	false	false
Ice Thickness and Surface Elevation, Southeastern Ross Embayment, West Antarctica	8919147	2004-03-17	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	Corridor Aerogeophysics of the Southeastern Ross Transect Zone (CASERTZ), Antarctica	Ice surface elevation and ice thickness data are available for a portion of the West Antarctic Ice Sheet. The investigators utilized a laser altimeter and ice-penetrating radar mounted to a Twin Otter aircraft to survey the ice sheet. Ice surface elevations and ice thickness data, derived from laser altimetry and radar sounding results, are available in ASCII format via ftp. These data are a result of the Corridor Aerogeophysics of the Southeastern Ross Transect Zone (CASERTZ) experiments of the 1990s. The CASERTZ geophysical surveys were aimed at understanding geological controls on ice streams of the West Antarctic Ice Sheet, ultimately to help assess the potential for ice sheet collapse. Blankenship et al. (2001) used ice surface elevations and ice thicknesses (reported here) to calculate driving stresses across the ice sheet and thus to identify regions of rapid basal movement by ice streams.	["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))"]	["POINT(-119 -82)"]	false	false
Surface Elevation and Ice Thickness, Western Marie Byrd Land, Antarctica	0338151	2003-12-10	Luyendyk, Bruce P.; Wilson, Douglas S.	Glaciological Characteristics of the Ross/Amundsen Sea Ice-flow Divide Deduced by a New Analysis of Ice-penetrating Radar Data	This data set provides surface elevation and ice thickness data for a portion of the Marie Byrd Land sector of West Antarctica, including the Ford Ranges, the Sulzberger Ice Shelf, much of the Edward VII Peninsula, and the Shirase Coast region of the eastern Ross Ice Shelf. The investigators used radar sounding and laser altimetry from a Twin Otter aircraft flying at varying altitudes, at least 300 m above the surface, at an air speed of about 130 knots. Surveys were accomplished with 64 flights in December 1998 and January 1999. This research was funded by the National Science Foundation (NSF) contract NSF OPP 9615281.	["POLYGON((-157 -71,-154.9 -71,-152.8 -71,-150.7 -71,-148.6 -71,-146.5 -71,-144.4 -71,-142.3 -71,-140.2 -71,-138.1 -71,-136 -71,-136 -71.9,-136 -72.8,-136 -73.7,-136 -74.6,-136 -75.5,-136 -76.4,-136 -77.3,-136 -78.2,-136 -79.1,-136 -80,-138.1 -80,-140.2 -80,-142.3 -80,-144.4 -80,-146.5 -80,-148.6 -80,-150.7 -80,-152.8 -80,-154.9 -80,-157 -80,-157 -79.1,-157 -78.2,-157 -77.3,-157 -76.4,-157 -75.5,-157 -74.6,-157 -73.7,-157 -72.8,-157 -71.9,-157 -71))"]	["POINT(-146.5 -75.5)"]	false	false
Roosevelt Island Bedrock and Surface Elevations	9615347	2003-05-23	Conway, Howard	Radar Investigations of Former Shear Margins: Roosevelt Island and Ice Stream C	This data set consists of bedrock and surface elevation readings taken by ground penetrating radar and Global Positioning System (GPS) on Roosevelt Island, an ice dome within the Ross Ice Shelf. Locations were validated by GPS readings of poles set in the surface snow. The data was collected between November and December, 1997. Data are available via ftp, and are provided in a text file with an accompanying file that provides GPS locations. Surface and bedrock elevations are given in meters above WGS84.	["POLYGON((-161.5307 -79.3539,-161.3584 -79.3539,-161.1861 -79.3539,-161.0138 -79.3539,-160.8415 -79.3539,-160.6692 -79.3539,-160.4969 -79.3539,-160.3246 -79.3539,-160.1523 -79.3539,-159.98 -79.3539,-159.8077 -79.3539,-159.8077 -79.37757,-159.8077 -79.40124,-159.8077 -79.42491,-159.8077 -79.44858,-159.8077 -79.47225,-159.8077 -79.49592,-159.8077 -79.51959,-159.8077 -79.54326,-159.8077 -79.56693,-159.8077 -79.5906,-159.98 -79.5906,-160.1523 -79.5906,-160.3246 -79.5906,-160.4969 -79.5906,-160.6692 -79.5906,-160.8415 -79.5906,-161.0138 -79.5906,-161.1861 -79.5906,-161.3584 -79.5906,-161.5307 -79.5906,-161.5307 -79.56693,-161.5307 -79.54326,-161.5307 -79.51959,-161.5307 -79.49592,-161.5307 -79.47225,-161.5307 -79.44858,-161.5307 -79.42491,-161.5307 -79.40124,-161.5307 -79.37757,-161.5307 -79.3539))"]	["POINT(-160.6692 -79.47225)"]	false	false
Roosevelt Island Ice Core Density and Beta Count Data	9615347	2003-05-14	Conway, Howard	Radar Investigations of Former Shear Margins: Roosevelt Island and Ice Stream C	This data set measures the radioactive decay of nuclear material from Northern and Southern hemisphere nuclear testing. Firn cores were taken from three locations on Roosevelt Island, an ice dome within the Ross Ice Shelf, and were measured at increasing depth for density in kilograms per cubic meter, and for beta counts per hour per kilogram. The data were collected between November and December of 1997. Measurements were taken incrementally down to approximately 17 meters for each of the three cores. Data are available in text format via ftp.	["POLYGON((-161.5667 -79.3889,-161.44836 -79.3889,-161.33002 -79.3889,-161.21168 -79.3889,-161.09334 -79.3889,-160.975 -79.3889,-160.85666 -79.3889,-160.73832 -79.3889,-160.61998 -79.3889,-160.50164 -79.3889,-160.3833 -79.3889,-160.3833 -79.41168,-160.3833 -79.43446,-160.3833 -79.45724,-160.3833 -79.48002,-160.3833 -79.5028,-160.3833 -79.52558,-160.3833 -79.54836,-160.3833 -79.57114,-160.3833 -79.59392,-160.3833 -79.6167,-160.50164 -79.6167,-160.61998 -79.6167,-160.73832 -79.6167,-160.85666 -79.6167,-160.975 -79.6167,-161.09334 -79.6167,-161.21168 -79.6167,-161.33002 -79.6167,-161.44836 -79.6167,-161.5667 -79.6167,-161.5667 -79.59392,-161.5667 -79.57114,-161.5667 -79.54836,-161.5667 -79.52558,-161.5667 -79.5028,-161.5667 -79.48002,-161.5667 -79.45724,-161.5667 -79.43446,-161.5667 -79.41168,-161.5667 -79.3889))"]	["POINT(-160.975 -79.5028)"]	false	false
Siple Dome Glaciology and Ice Stream History 1994, 1996	9316338	1999-01-01	Jacobel, Robert	Siple Dome Glaciology and Ice Stream History	The Siple Dome Glaciology and Ice Stream History project was part of Western Divide West Antarctic Ice Cores (WAISCORES), an NSF-funded project to understand the influence of the West Antarctic ice sheet on climate and sea level change. WAISCORES researchers acquired and analyzed ice cores from the Siple Dome, in the Siple Coast region, West Antarctica. This project supported glaciological studies of Siple Dome and its surroundings between Ice Streams C and D, via two major goals. First, it sought to characterize the dynamic environment and ice stratigraphy of Siple Dome and its surroundings, with the specific mission of assessing Siple Dome as a potential deep core site; and second, to determine whether the configuration of ice stream flow in the region has changed over time. Both goals are relevant to understanding the dynamics of the West Antarctic Ice Sheet (WAIS), its history, and potential future behavior. This project was a collaboration between Saint Olaf College, the University of Washington, and the National Snow and Ice Data Center at the University of Colorado. It included studies of satellite imagery and acquisition and analysis of field data from GPS, firn cores and snow pits, and ground-based ice-penetrating radar. Data in this collection were obtained during two Antarctic field seasons in 1994–95 and 1996–97. The data set is available via FTP as Microsoft Excel Spreadsheet (.xls) and ASCII tab delimited (.txt) files. Related notes are available as a Microsoft Word (.doc) or text (.txt) file. Related images and charts are available as Graphics Interchange Format (.gif) and Joint Photographic Experts Group (.jpg) files.	["POLYGON((-155 -81,-154 -81,-153 -81,-152 -81,-151 -81,-150 -81,-149 -81,-148 -81,-147 -81,-146 -81,-145 -81,-145 -81.2,-145 -81.4,-145 -81.6,-145 -81.8,-145 -82,-145 -82.2,-145 -82.4,-145 -82.6,-145 -82.8,-145 -83,-146 -83,-147 -83,-148 -83,-149 -83,-150 -83,-151 -83,-152 -83,-153 -83,-154 -83,-155 -83,-155 -82.8,-155 -82.6,-155 -82.4,-155 -82.2,-155 -82,-155 -81.8,-155 -81.6,-155 -81.4,-155 -81.2,-155 -81))"]	["POINT(-150 -82)"]	false	false

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