USAP-DC

{"dp_type": "Dataset", "free_text": "Ground Penetrating Radar"}

[{"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": "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": "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": "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": "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": "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": "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": "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}]

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