USAP-DC

{"dp_type": "Dataset", "free_text": "Allan Hills Blue Ice"}

[{"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": "Allan Hills; Antarctica", "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": "p0010321", "repository": "USAP-DC", "title": "Center for Oldest Ice Exploration"}, {"proj_uid": "p0010253", "repository": "USAP-DC", "title": "Collaborative research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area "}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.73243, "title": "CO2 and CH4 from Allan Hills ice cores ALHIC1901, 1902, and 1903", "uid": "601896", "west": 159.3562}, {"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": "Antarctica; Allan Hills", "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": 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": "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": null, "title": "Heavy noble gases (Ar/Xe/Kr) from ALHIC1901, 1902, and 1903", "uid": "601895", "west": null}, {"awards": "1745006 Brook, Edward J.; 2019719 Brook, Edward", "bounds_geometry": ["POINT(159.356125 -76.732376)"], "date_created": "Mon, 06 Jan 2025 00:00:00 GMT", "description": "This dataset contains snapshots of carbon dioxide and methane concentrations, total air content, stable isotope measurements of carbon dioxide, as well as measurements of molecular oxygen and nitrogen and their stable isotopic signatures. Samples come from the ALHIC1901 ice core from the Allan Hills, Antarctica. Where possible, new ages have been assigned to previous measurements from the ALHIC1503 ice core. For samples containing excess CO2 from a secondary source, estimated atmospheric CO2 ranges are included. ", "east": 159.356125, "geometry": ["POINT(159.356125 -76.732376)"], "keywords": "Allan Hills; Antarctica; Blue Ice; Carbon Dioxide; Cryosphere; Methane", "locations": "Allan Hills; Antarctica; Allan Hills", "north": -76.732376, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Marks Peterson, Julia; Brook, Edward; Kalk, Michael; Hishamunda, Valens; Shackleton, Sarah; Severinghaus, Jeffrey P.", "project_titles": "Center for Oldest Ice Exploration; Collaborative research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area ", "projects": [{"proj_uid": "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": "COLDEX", "south": -76.732376, "title": "Snapshot record of CO2 and CH4 from the Allan Hills, Antarctica, ranging from 400,000 to 3 million years old", "uid": "601878", "west": 159.356125}, {"awards": "1744832 Severinghaus, Jeffrey; 2019719 Brook, Edward; 1745006 Brook, Edward J.; 1744993 Higgins, John; 1745007 Mayewski, Paul; 0838843 Kurbatov, Andrei; 1443306 Mayewski, Paul", "bounds_geometry": null, "date_created": "Mon, 16 Dec 2024 00:00:00 GMT", "description": "This project aimed to reconstruct paleoclimate conditions from old Antarctic ice using stable water isotope analysis. Through multi-year, multi-institutional collaboration, data from several sites have been analyzed. These findings will contribute to several studies, advancing our understanding of Earth\u0027s past climate and long-term climate changes.", "east": null, "geometry": null, "keywords": "Allan Hills; Antarctica; Cryosphere; Isotope Data", "locations": "Antarctica; Allan Hills", "north": null, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology; Antarctic Glaciology", "persons": "Kurbatov, Andrei V.; Mayewski, Paul A.; Introne, Douglas; Severinghaus, Jeffrey P.; Higgins, John; Brook, Edward", "project_titles": "Center for Oldest Ice Exploration; Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area", "projects": [{"proj_uid": "p0000760", "repository": "USAP-DC", "title": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area"}, {"proj_uid": "p0010321", "repository": "USAP-DC", "title": "Center for Oldest Ice Exploration"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills; COLDEX", "south": null, "title": "Allan Hills ice water stable isotope record for dD, d18O", "uid": "601863", "west": null}, {"awards": "2149518 Fudge, Tyler; 2019719 Brook, Edward", "bounds_geometry": ["POINT(159.36 -76.73)"], "date_created": "Fri, 06 Dec 2024 00:00:00 GMT", "description": "This dataset includes three-dimensional multitrack electrical conductivity measurements (3D ECM) results from measurements in the upper sections of the ALHIC2201 and ALHIC2302 large (241mm) diameter ice cores drilled in the Allan Hills blue ice area (76.73\u00b0S,159.36\u00b0E) in Victoria Land, East Antarctica. The data extends from the surface to 23.0 m depth in ALHIC2201 and from 8.5 m to 46.3 m depth in ALHIC2302. We include the raw 3D ECM data (AC and DC multitrack ECM measurements on perpendicular faces of a quarter-core cut) in CSV format and basic plots of this data. We also provide dip and dip direction estimates of the layering observed in each core section in a CSV table.", "east": 159.36, "geometry": ["POINT(159.36 -76.73)"], "keywords": "Allan Hills; Antarctica; Cryosphere", "locations": "Antarctica; Allan Hills", "north": -76.73, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Kirkpatrick, Liam; Carter, Austin; Marks Peterson, Julia; Shackleton, Sarah; Fudge, T. J.", "project_titles": "Center for Oldest Ice Exploration; Collaborative Research: Testing Next Generation Measurement Techniques for Reconstruction of Paleoclimate Archives from Thin or Disturbed Ice Cores Sections", "projects": [{"proj_uid": "p0010321", "repository": "USAP-DC", "title": "Center for Oldest Ice Exploration"}, {"proj_uid": "p0010365", "repository": "USAP-DC", "title": "Collaborative Research: Testing Next Generation Measurement Techniques for Reconstruction of Paleoclimate Archives from Thin or Disturbed Ice Cores Sections"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "COLDEX", "south": -76.73, "title": "ALHIC2201 and ALHIC2302 3D ECM and Layer Orientations", "uid": "601854", "west": 159.36}, {"awards": "2035580 Aarons, Sarah", "bounds_geometry": ["POINT(159.31 -76.7)"], "date_created": "Thu, 15 Aug 2024 00:00:00 GMT", "description": "This dataset contains dust mass concentrations, coarse particle fraction, interpolated accumulation rate, and dust flux from ALHIC1903 spanning the transition from MIS 6 through 5e.", "east": 159.31, "geometry": ["POINT(159.31 -76.7)"], "keywords": "Accumulation Rate; ALHIC1903; Allan Hills; Antarctica; Blue Ice; Concentration; Cryosphere; Dust; Flux", "locations": "Antarctica; Allan Hills", "north": -76.7, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Carter, Austin", "project_titles": "Collaborative Research: Peripheral East Antarctic ice as a unique recorder of climate variability during the Last Interglacial", "projects": [{"proj_uid": "p0010270", "repository": "USAP-DC", "title": "Collaborative Research: Peripheral East Antarctic ice as a unique recorder of climate variability during the Last Interglacial"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -76.7, "title": "Concentration and flux of ice core dust from ALHIC1903 drilled at the Allan Hills Blue Ice Area", "uid": "601825", "west": 159.31}, {"awards": "2035580 Aarons, Sarah", "bounds_geometry": ["POINT(159.31 -76.7)"], "date_created": "Thu, 15 Aug 2024 00:00:00 GMT", "description": "This dataset contains Sr and Nd isotope compositions of ice core dust from ALHIC1903 spanning the transition from MIS 6 through 5e.", "east": 159.31, "geometry": ["POINT(159.31 -76.7)"], "keywords": "ALHIC1903; Allan Hills; Antarctica; Cryosphere; Dust; Ice Core Data; Isotope; Nd; Neodymium; Sr; Strontium", "locations": "Antarctica; Antarctica; Allan Hills", "north": -76.7, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Carter, Austin", "project_titles": "Collaborative Research: Peripheral East Antarctic ice as a unique recorder of climate variability during the Last Interglacial", "projects": [{"proj_uid": "p0010270", "repository": "USAP-DC", "title": "Collaborative Research: Peripheral East Antarctic ice as a unique recorder of climate variability during the Last Interglacial"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -76.7, "title": "Strontium and neodymium isotope compositions of ice core dust from ALHIC1903 drilled at the Allan Hills Blue Ice Area.", "uid": "601820", "west": 159.31}, {"awards": "2035580 Aarons, Sarah", "bounds_geometry": ["POINT(159.31 -76.7)"], "date_created": "Thu, 15 Aug 2024 00:00:00 GMT", "description": "This dataset contains rare earth elemental concentrations of leached ice core dust from ALHIC1903 spanning the transition from MIS 6 through 5e.", "east": 159.31, "geometry": ["POINT(159.31 -76.7)"], "keywords": "ALHIC1903; Allan Hills; Antarctica; Blue Ice; Cryosphere; Dust; Leach; Rare Earth Element", "locations": "Antarctica; Allan Hills", "north": -76.7, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Carter, Austin", "project_titles": "Collaborative Research: Peripheral East Antarctic ice as a unique recorder of climate variability during the Last Interglacial", "projects": [{"proj_uid": "p0010270", "repository": "USAP-DC", "title": "Collaborative Research: Peripheral East Antarctic ice as a unique recorder of climate variability during the Last Interglacial"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.7, "title": "Rare earth elemental concentrations of leached ice core dust from ALHIC1903 drilled at the Allan Hills Blue Ice Area.", "uid": "601821", "west": 159.31}, {"awards": "2035580 Aarons, Sarah", "bounds_geometry": ["POINT(159.31 -76.7)"], "date_created": "Thu, 15 Aug 2024 00:00:00 GMT", "description": "This dataset contains oxygen and hydrogen isotope compositions and associated d-excess of ice from ALHIC1903 spanning the transition from MIS 6 through 5e.", "east": 159.31, "geometry": ["POINT(159.31 -76.7)"], "keywords": "ALHIC1903; Allan Hills; Antarctica; Cryosphere; Deuterium; Hydrogen; Ice; Ice Core Data; Isotope; Oxygen; Water", "locations": "Allan Hills; Antarctica", "north": -76.7, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Carter, Austin", "project_titles": "Collaborative Research: Peripheral East Antarctic ice as a unique recorder of climate variability during the Last Interglacial", "projects": [{"proj_uid": "p0010270", "repository": "USAP-DC", "title": "Collaborative Research: Peripheral East Antarctic ice as a unique recorder of climate variability during the Last Interglacial"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.7, "title": "Oxygen and hydrogen isotope compositions and associated d-excess of ice from ALHIC1903 drilled at the Allan Hills Blue Ice Area.", "uid": "601822", "west": 159.31}, {"awards": "1744993 Higgins, John", "bounds_geometry": ["POLYGON((159.17 -76.67,159.195 -76.67,159.22 -76.67,159.24499999999998 -76.67,159.26999999999998 -76.67,159.295 -76.67,159.32 -76.67,159.345 -76.67,159.36999999999998 -76.67,159.39499999999998 -76.67,159.42 -76.67,159.42 -76.676,159.42 -76.682,159.42 -76.688,159.42 -76.694,159.42 -76.7,159.42 -76.706,159.42 -76.712,159.42 -76.718,159.42 -76.724,159.42 -76.73,159.39499999999998 -76.73,159.36999999999998 -76.73,159.345 -76.73,159.32 -76.73,159.295 -76.73,159.26999999999998 -76.73,159.24499999999998 -76.73,159.22 -76.73,159.195 -76.73,159.17 -76.73,159.17 -76.724,159.17 -76.718,159.17 -76.712,159.17 -76.706,159.17 -76.7,159.17 -76.694,159.17 -76.688,159.17 -76.682,159.17 -76.676,159.17 -76.67))"], "date_created": "Fri, 16 Jun 2023 00:00:00 GMT", "description": "Unpublished field report describing drilling, sampling, and temperature profiles for shallow ice cores and boreholes at Allan Hills in 2022-2023 field season", "east": 159.42, "geometry": ["POINT(159.295 -76.7)"], "keywords": "Allan Hills; Antarctica; Ice Core", "locations": "Antarctica; Allan Hills", "north": -76.67, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Shackleton, Sarah; Brook, Edward J.", "project_titles": "Center for Oldest Ice Exploration; Collaborative research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area ", "projects": [{"proj_uid": "p0010253", "repository": "USAP-DC", "title": "Collaborative research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area "}, {"proj_uid": "p0010321", "repository": "USAP-DC", "title": "Center for Oldest Ice Exploration"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.73, "title": "Allan Hills 2022-23 Shallow Ice Core Field Report", "uid": "601696", "west": 159.17}, {"awards": "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": "1744832 Severinghaus, Jeffrey", "bounds_geometry": ["POINT(159.3562 -76.73243)"], "date_created": "Tue, 22 Nov 2022 00:00:00 GMT", "description": "These data cover the penultimate glacial period (MIS 6) and parts of MIS5, in Allan Hills ice. The d18Oatm data are useful for dating the core, and the 15N is useful for inferring firn thickness. Importantly, the data have only been corrected for gas loss using published methods (i.e. Baggenstos et al. 2017), but not for recently recognized (and unpublished) effects of declining contemporary atmospheric O2/N2 due to fossil fuel burning. These changes unfortunately affect the La Jolla Air standard gas O2/N2 ratio that is used in our lab to make the measurements. Users of this data are encouraged to contact Jeff Severinghaus for help in making these novel corrections to the standard gas.", "east": 159.3562, "geometry": ["POINT(159.3562 -76.73243)"], "keywords": "18O; Allan Hills; Allan Hills Blue Ice; Antarctica; Blue Ice; Delta 15N; Delta 18O; Dole Effect; Firn Thickness; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Chronology; Ice Core Records", "locations": "Antarctica; Allan Hills", "north": -76.73243, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Severinghaus, Jeffrey P.", "project_titles": "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": "Allan Hills CMC3 ice core d18Oatm, d15N, dO2/N2, dAr/N2, d40/36Ar, d40/38Ar 2021 \u0026 2022", "uid": "601620", "west": 159.3562}, {"awards": "2002422 TBD", "bounds_geometry": ["POLYGON((159 -75.67,159.025 -75.67,159.05 -75.67,159.075 -75.67,159.1 -75.67,159.125 -75.67,159.15 -75.67,159.175 -75.67,159.2 -75.67,159.225 -75.67,159.25 -75.67,159.25 -75.786,159.25 -75.902,159.25 -76.018,159.25 -76.134,159.25 -76.25,159.25 -76.366,159.25 -76.482,159.25 -76.598,159.25 -76.714,159.25 -76.83,159.225 -76.83,159.2 -76.83,159.175 -76.83,159.15 -76.83,159.125 -76.83,159.1 -76.83,159.075 -76.83,159.05 -76.83,159.025 -76.83,159 -76.83,159 -76.714,159 -76.598,159 -76.482,159 -76.366,159 -76.25,159 -76.134,159 -76.018,159 -75.902,159 -75.786,159 -75.67))"], "date_created": "Tue, 02 Aug 2022 00:00:00 GMT", "description": "This file includes the clumped-isotope composition (18O18O) molecular oxygen (O2) that is in the trapped air from the S27 ice core collected in Allan Hills Blue Ice Area.", "east": 159.25, "geometry": ["POINT(159.125 -76.25)"], "keywords": "Allan Hills; Antarctica; Last Interglacial; Oxygen", "locations": "Antarctica; Allan Hills", "north": -75.67, "nsf_funding_programs": null, "persons": "Yan, Yuzhen; Yeung, Laurence; Banerjee, Asmita", "project_titles": null, "projects": null, "repositories": null, "science_programs": "Allan Hills", "south": -76.83, "title": "Clumped-isotope composition of molecular oxygen trapped in the Allan Hills S27 ice core", "uid": "601593", "west": 159.0}, {"awards": "1443263 Higgins, John", "bounds_geometry": ["POLYGON((159 -75.67,159.025 -75.67,159.05 -75.67,159.075 -75.67,159.1 -75.67,159.125 -75.67,159.15 -75.67,159.175 -75.67,159.2 -75.67,159.225 -75.67,159.25 -75.67,159.25 -75.786,159.25 -75.902,159.25 -76.018,159.25 -76.134,159.25 -76.25,159.25 -76.366,159.25 -76.482,159.25 -76.598,159.25 -76.714,159.25 -76.83,159.225 -76.83,159.2 -76.83,159.175 -76.83,159.15 -76.83,159.125 -76.83,159.1 -76.83,159.075 -76.83,159.05 -76.83,159.025 -76.83,159 -76.83,159 -76.714,159 -76.598,159 -76.482,159 -76.366,159 -76.25,159 -76.134,159 -76.018,159 -75.902,159 -75.786,159 -75.67))"], "date_created": "Mon, 24 Jan 2022 00:00:00 GMT", "description": "This file includes the \u03b415N of N2, \u03b418O of O2 (\u03b418Oatm), \u03b4O2/N2, and \u03b4Ar/N2 in the S27 ice core drilled in Allan Hills Blue Ice Area.", "east": 159.25, "geometry": ["POINT(159.125 -76.25)"], "keywords": "Allan Hills; Antarctica; Blue Ice; Ice Core; Ice Core Gas Records; Isotope; Nitrogen; Oxygen", "locations": "Antarctica; Allan Hills", "north": -75.67, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Yan, Yuzhen; Bender, Michael; Higgins, John", "project_titles": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area", "projects": [{"proj_uid": "p0000760", "repository": "USAP-DC", "title": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.83, "title": "Stable isotope composition of the trapped air in the Allan Hills S27 ice core", "uid": "601512", "west": 159.0}, {"awards": "1443263 Higgins, John", "bounds_geometry": ["POINT(159.35507 -76.73286)"], "date_created": "Tue, 02 Nov 2021 00:00:00 GMT", "description": "This file includes the d15N, O2/N2 ratio, Ar/N2 ratio, and d18O of O2 (d18Oatm) in Allan Hills ice cores (ALHIC1502 and ALHIC1503). This dataset replaces an earlier version of the elemental and isotopic composition in Allan Hills ice cores (DOI: 10.15784/601204) by adding new data from 60 depths in ALHIC1502 core (26.26 m to 175.74 m). ", "east": 159.35507, "geometry": ["POINT(159.35507 -76.73286)"], "keywords": "Allan Hills; Antarctica; Argon; Ice; Ice Core Data; Ice Core Gas Records; Isotope; Mass Spectrometry; Nitrogen; Oxygen", "locations": "Allan Hills; Antarctica", "north": -76.73286, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Yan, Yuzhen; Bender, Michael; Higgins, John", "project_titles": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area", "projects": [{"proj_uid": "p0000760", "repository": "USAP-DC", "title": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.73286, "title": "Elemental and isotopic composition of nitrogen, oxygen, and argon in Allan Hills ice cores", "uid": "601483", "west": 159.35507}, {"awards": "1443263 Higgins, John; 1443276 Brook, Edward J.", "bounds_geometry": ["POLYGON((159 -75.67,159.025 -75.67,159.05 -75.67,159.075 -75.67,159.1 -75.67,159.125 -75.67,159.15 -75.67,159.175 -75.67,159.2 -75.67,159.225 -75.67,159.25 -75.67,159.25 -75.786,159.25 -75.902,159.25 -76.018,159.25 -76.134,159.25 -76.25,159.25 -76.366,159.25 -76.482,159.25 -76.598,159.25 -76.714,159.25 -76.83,159.225 -76.83,159.2 -76.83,159.175 -76.83,159.15 -76.83,159.125 -76.83,159.1 -76.83,159.075 -76.83,159.05 -76.83,159.025 -76.83,159 -76.83,159 -76.714,159 -76.598,159 -76.482,159 -76.366,159 -76.25,159 -76.134,159 -76.018,159 -75.902,159 -75.786,159 -75.67))"], "date_created": "Wed, 20 Jan 2021 00:00:00 GMT", "description": "This file includes the concentration of carbon dioxide (CO2) and methane (CH4) in the trapped air from the S27 ice core collected in Allan Hills Blue Ice Area.", "east": 159.25, "geometry": ["POINT(159.125 -76.25)"], "keywords": "Allan Hills; Antarctica; Blue Ice; Carbon Dioxide; Ice Core; Methane", "locations": "Antarctica; Allan Hills; Antarctica", "north": -75.67, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Yan, Yuzhen; Brook, Edward J.", "project_titles": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area", "projects": [{"proj_uid": "p0000760", "repository": "USAP-DC", "title": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.83, "title": "Greenhouse gas composition in the Allan Hills S27 ice core", "uid": "601425", "west": 159.0}, {"awards": "1443263 Higgins, John", "bounds_geometry": ["POINT(159.35507 -76.73286)"], "date_created": "Wed, 14 Aug 2019 00:00:00 GMT", "description": "This file includes the concentration methane (CH4) in Allan Hills ice cores (ALHIC1502 and ALHIC1503).", "east": 159.35507, "geometry": ["POINT(159.35507 -76.73286)"], "keywords": "Allan Hills; Allan Hills Project; Antarctica; Chemistry:ice; Chemistry:Ice; Gas Chromatography; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Greenhouse Gas; Ice; Ice Core Data; Ice Core Gas Records; Methane; Snow/ice; Snow/Ice", "locations": "Antarctica; Allan Hills", "north": -76.73286, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Yan, Yuzhen; Bender, Michael; Brook, Edward J.; Higgins, John", "project_titles": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area", "projects": [{"proj_uid": "p0000760", "repository": "USAP-DC", "title": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.73286, "title": "Methane concentration in Allan Hills ice cores", "uid": "601203", "west": 159.35507}, {"awards": "1443263 Higgins, John", "bounds_geometry": ["POINT(159.35507 -76.73286)"], "date_created": "Wed, 14 Aug 2019 00:00:00 GMT", "description": "This file includes the concentration of carbon dioxide (CO2) and methane (CH4) and the stable carbon isotope composition of CO2 in Allan Hills ice cores (ALHIC1502 and ALHIC1503).", "east": 159.35507, "geometry": ["POINT(159.35507 -76.73286)"], "keywords": "Allan Hills; Allan Hills Project; Antarctica; Carbon Dioxide; Carbon Isotopes; Chemistry:ice; Chemistry:Ice; CO2; Gas Chromatography; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice; Ice Core Data; Ice Core Gas Records; Ice Core Records; Mass Spectrometer; Mass Spectrometry; Methane; Snow/ice; Snow/Ice", "locations": "Antarctica; Allan Hills", "north": -76.73286, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Yan, Yuzhen; Bender, Michael; Brook, Edward J.; Higgins, John", "project_titles": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area", "projects": [{"proj_uid": "p0000760", "repository": "USAP-DC", "title": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.73286, "title": "Carbon dioxide concentration and its stable carbon isotope composition in Allan Hills ice cores", "uid": "601202", "west": 159.35507}, {"awards": "1443263 Higgins, John", "bounds_geometry": ["POINT(159.35507 -76.73286)"], "date_created": "Wed, 14 Aug 2019 00:00:00 GMT", "description": "This file includes argon isotope composition and xenon-to-krypton ratios measured in Allan Hills ice cores.", "east": 159.35507, "geometry": ["POINT(159.35507 -76.73286)"], "keywords": "Allan Hills; Allan Hills Project; Antarctica; Argon; Chemistry:ice; Chemistry:Ice; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core; Ice Core Data; Ice Core Gas Records; Krypton; Mass Spectrometer; Noble Gas; Snow/ice; Snow/Ice; Xenon", "locations": "Antarctica; Allan Hills", "north": -76.73286, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Yan, Yuzhen; Bender, Michael; Higgins, John; Ng, Jessica; Severinghaus, Jeffrey P.", "project_titles": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area", "projects": [{"proj_uid": "p0000760", "repository": "USAP-DC", "title": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.73286, "title": "Elemental and isotopic composition of heavy noble gases in Allan Hills ice cores", "uid": "601201", "west": 159.35507}, {"awards": "1443306 Mayewski, Paul; 1443263 Higgins, John", "bounds_geometry": ["POLYGON((159.35343 -76.73165,159.360199 -76.73165,159.366968 -76.73165,159.373737 -76.73165,159.380506 -76.73165,159.387275 -76.73165,159.394044 -76.73165,159.400813 -76.73165,159.407582 -76.73165,159.414351 -76.73165,159.42112 -76.73165,159.42112 -76.731833,159.42112 -76.732016,159.42112 -76.732199,159.42112 -76.732382,159.42112 -76.732565,159.42112 -76.732748,159.42112 -76.732931,159.42112 -76.733114,159.42112 -76.733297,159.42112 -76.73348,159.414351 -76.73348,159.407582 -76.73348,159.400813 -76.73348,159.394044 -76.73348,159.387275 -76.73348,159.380506 -76.73348,159.373737 -76.73348,159.366968 -76.73348,159.360199 -76.73348,159.35343 -76.73348,159.35343 -76.733297,159.35343 -76.733114,159.35343 -76.732931,159.35343 -76.732748,159.35343 -76.732565,159.35343 -76.732382,159.35343 -76.732199,159.35343 -76.732016,159.35343 -76.731833,159.35343 -76.73165))"], "date_created": "Wed, 17 Oct 2018 00:00:00 GMT", "description": "Stable water isotope data for the surface ice samples (listed as point numbers \u00ad coordinates provided) collected at the Allan Hills Blue ice area have been generated under a collaborative effort by the University of Maine Climate Change Institute (NSF Award#1443306) and Princeton University (NSF Award# 1443263). This data set contains stable isotope data (dD, d18O) of meltwater samples collected from the\r\narea(76.73165 to 76.73348 S,\u00a0159.35343 to 159.42112 E).", "east": 159.42112, "geometry": ["POINT(159.387275 -76.732565)"], "keywords": "Allan Hills; Allan Hills Project; Antarctica; Blue Ice; Chemistry:ice; Chemistry:Ice; Delta 18O; Delta Deuterium; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Gas Records; Ice Core Records; Oxygen; Snow/ice; Snow/Ice; Stable Water Isotopes; Transantarctic Mountains", "locations": "Antarctica; Allan Hills; Transantarctic Mountains", "north": -76.73165, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Kurbatov, Andrei V.; Mayewski, Paul A.; Introne, Douglas; Yan, Yuzhen", "project_titles": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area", "projects": [{"proj_uid": "p0000760", "repository": "USAP-DC", "title": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.73348, "title": "Stable water isotope data for the surface samples collected at the Allan Hills Blue ice area", "uid": "601130", "west": 159.35343}, {"awards": "1443263 Higgins, John; 1443306 Mayewski, Paul", "bounds_geometry": ["POINT(159.35507 -76.73286)"], "date_created": "Wed, 17 Oct 2018 00:00:00 GMT", "description": "Stable water isotope data for the ice core drilled at the Allan Hills Blue ice area have been generated under a collaborative effort by the University of Maine Climate Change Institute (NSF Award#1443306) and Princeton University (NSF Award# 1443263). This data set contains \r\nstable isotope data (dD, d18O) of meltwater samples collected from the ice core AH-1502 (76.73286 S, 159.35507 E) was drilled in 2015-16 field season to 197 meters below the surface.", "east": 159.35507, "geometry": ["POINT(159.35507 -76.73286)"], "keywords": "Allan Hills; Allan Hills Project; Antarctica; Blue Ice; Delta 18O; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core; Ice Core Chemistry; Ice Core Records; Isotope Data; Oxygen; Snow/ice; Snow/Ice; Stable Water Isotopes; Transantarctic Mountains", "locations": "Transantarctic Mountains; Antarctica; Allan Hills", "north": -76.73286, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Kurbatov, Andrei V.; Mayewski, Paul A.; Introne, Douglas; Yan, Yuzhen", "project_titles": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area", "projects": [{"proj_uid": "p0000760", "repository": "USAP-DC", "title": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.73286, "title": "Stable water isotope data for the AH-1502 ice core drilled at the Allan Hills Blue ice area", "uid": "601129", "west": 159.35507}, {"awards": "1443263 Higgins, John; 1443306 Mayewski, Paul", "bounds_geometry": ["POINT(159.3562 -76.73243)"], "date_created": "Tue, 16 Oct 2018 00:00:00 GMT", "description": "Stable water isotope data for the AH-1503 ice core drilled at the Allan Hills\r Blue ice area have been generated under a collaborative effort by the\r University of Maine Climate Change Institute (NSF Award#1443263) and\r Princeton University (NSF Award# 1443263). This data set contains stable isotope data (dD, d18O) of meltwater samples collected from the\r ice core AH-1503 (76.73243 S,\u00a0159.3562 E). Ice core site AH-1503 used the same borehole as AH- BIT58 drilled down to 124 m during the 2011-12 field season. All drilling was conducted with a 3\" Eclipse drill (Ice Drilling Design and Operations (IDDO)).\r\n", "east": 159.3562, "geometry": ["POINT(159.3562 -76.73243)"], "keywords": "Allan Hills; Antarctica; Blue Ice; Chemistry:ice; Chemistry:Ice; Delta 18O; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Isotope Record; Mass Spectrometry; Stable Water Isotopes", "locations": "Antarctica; Allan Hills", "north": -76.73243, "nsf_funding_programs": "Antarctic Glaciology; Antarctic Glaciology", "persons": "Kurbatov, Andrei V.; Mayewski, Paul A.; Introne, Douglas; Yan, Yuzhen", "project_titles": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area", "projects": [{"proj_uid": "p0000760", "repository": "USAP-DC", "title": "Collaborative Research: Window into the World with 40,000-year Glacial Cycles from Climate Records in Million Year-old Ice from the Allan Hills Blue Ice Area"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.73243, "title": "Stable water isotope data for the AH-1503 ice core drilled at the Allan Hills Blue ice area", "uid": "601128", "west": 159.3562}, {"awards": "0838849 Bender, Michael", "bounds_geometry": ["POLYGON((159.02 -76.67,159.057 -76.67,159.094 -76.67,159.131 -76.67,159.168 -76.67,159.205 -76.67,159.242 -76.67,159.279 -76.67,159.316 -76.67,159.353 -76.67,159.39 -76.67,159.39 -76.687,159.39 -76.704,159.39 -76.721,159.39 -76.738,159.39 -76.755,159.39 -76.772,159.39 -76.789,159.39 -76.806,159.39 -76.823,159.39 -76.84,159.353 -76.84,159.316 -76.84,159.279 -76.84,159.242 -76.84,159.205 -76.84,159.168 -76.84,159.131 -76.84,159.094 -76.84,159.057 -76.84,159.02 -76.84,159.02 -76.823,159.02 -76.806,159.02 -76.789,159.02 -76.772,159.02 -76.755,159.02 -76.738,159.02 -76.721,159.02 -76.704,159.02 -76.687,159.02 -76.67))"], "date_created": "Mon, 27 Mar 2017 00:00:00 GMT", "description": "Measurements of Ar isotopes (40Ar/38Ar/36Ar) and other gas species (18O/16O of O2, 15N/14N of N2, O2/N2 and Ar/N2 ratios) from ice cores drilled in the Allan Hills Blue Ice Area", "east": 159.39, "geometry": ["POINT(159.205 -76.755)"], "keywords": "Allan Hills; Antarctica; Argon; Chemistry:fluid; Chemistry:Fluid; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Ice Core Records; Isotope", "locations": "Antarctica; Allan Hills", "north": -76.67, "nsf_funding_programs": null, "persons": "Higgins, John", "project_titles": "Trace and Ultra-Trace Chemistry Measurements of the WAIS Divide Ice Core", "projects": [{"proj_uid": "p0000148", "repository": "USAP-DC", "title": "Trace and Ultra-Trace Chemistry Measurements of the WAIS Divide Ice Core"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": null, "south": -76.84, "title": "Gas measurement from Higgins et al., 2015 - PNAS", "uid": "601014", "west": 159.02}, {"awards": "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": "Antarctica; Allan Hills", "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": "0838849 Bender, Michael", "bounds_geometry": ["POLYGON((159.16667 -76.66667,159.19167 -76.66667,159.21667 -76.66667,159.24167 -76.66667,159.26667 -76.66667,159.29167 -76.66667,159.31667 -76.66667,159.34167 -76.66667,159.36667 -76.66667,159.39167 -76.66667,159.41667 -76.66667,159.41667 -76.673336,159.41667 -76.680002,159.41667 -76.686668,159.41667 -76.693334,159.41667 -76.7,159.41667 -76.706666,159.41667 -76.713332,159.41667 -76.719998,159.41667 -76.726664,159.41667 -76.73333,159.39167 -76.73333,159.36667 -76.73333,159.34167 -76.73333,159.31667 -76.73333,159.29167 -76.73333,159.26667 -76.73333,159.24167 -76.73333,159.21667 -76.73333,159.19167 -76.73333,159.16667 -76.73333,159.16667 -76.726664,159.16667 -76.719998,159.16667 -76.713332,159.16667 -76.706666,159.16667 -76.7,159.16667 -76.693334,159.16667 -76.686668,159.16667 -76.680002,159.16667 -76.673336,159.16667 -76.66667))"], "date_created": "Wed, 01 Jan 2014 00:00:00 GMT", "description": "This award supports a project to generate an absolute timescale for the Allan Hills Blue Ice Area (BIA), and then to reconstruct details of past climate changes and greenhouse gas concentrations for certain time periods back to 2.5 Ma. Ice ages will be determined by applying emerging methods for absolute and relative dating of trapped air bubbles (based on Argon-40/Argon-38, delta-18O of O2, and the O2/N2 ratio). To demonstrate the potential of the Allan Hills BIAs as a paleoclimate archive trenches and ice cores will be collected for age intervals corresponding to 110-140 ka, 1 Ma, and 2.5 Ma. During the proposed two field seasons a total of 6x100 m and additional 15 m cores will be combined with trenching. The intellectual merit of the proposed activity is that the results of this work will extend the landmark work of EPICA and other deep ice coring efforts, which give records dating back to 0.8 Ma, and will complement work planned by IPICS to drill a continuous Antarctic ice core extending to 1.5 Ma. The results will help to advance understanding of major climate regimes and transitions that took place between 0-2.5 Ma, including the 40 kyr world and the mid-Pleistocene climate transition. A major long-term scientific goal is to provide a transformative approach to the collection of paleoclimate records by establishing an \u0027International Climate Park\u0027 in the Allan Hills BIA that would enable sampling of large quantities of known age ice as old as 2.5 Ma, by any interested American or foreign investigator. The broader impacts resulting from the proposed activity include training students who are well versed in advanced field, laboratory and numerical modeling methods combining geochemistry, glaciology, and paleoclimatology. We will include material relevant to our proposed research in our ongoing efforts in local education and in our outreach efforts for media. The University of Maine already has cyberinfrastructure, using state of the art web-based technology, which can provide a wide community of scientists with fast access to the results of our research. The work will contribute to the broad array of climate change studies that is informing worldwide understanding of natural and anthropogenic forced climate change, and the options for responding. This award has field work in Antarctica.\n", "east": 159.41667, "geometry": ["POINT(159.29167 -76.7)"], "keywords": "Allan Hills; Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Ice Core Records; Paleoclimate; Solid Earth", "locations": "Allan Hills; Antarctica", "north": -76.66667, "nsf_funding_programs": null, "persons": "Bender, Michael", "project_titles": "Collaborative Research: Exploring A 2 Million + Year Ice Climate Archive-Allan Hills Blue Ice Area (2MBIA)", "projects": [{"proj_uid": "p0000046", "repository": "USAP-DC", "title": "Collaborative Research: Exploring A 2 Million + Year Ice Climate Archive-Allan Hills Blue Ice Area (2MBIA)"}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.73333, "title": "Exploring A 2 Million + Year Ice Climate Archive-Allan Hills Blue Ice Area (2MBIA)", "uid": "600099", "west": 159.16667}, {"awards": "0838843 Kurbatov, Andrei", "bounds_geometry": ["POLYGON((159 -75.67,159.025 -75.67,159.05 -75.67,159.075 -75.67,159.1 -75.67,159.125 -75.67,159.15 -75.67,159.175 -75.67,159.2 -75.67,159.225 -75.67,159.25 -75.67,159.25 -75.786,159.25 -75.902,159.25 -76.018,159.25 -76.134,159.25 -76.25,159.25 -76.366,159.25 -76.482,159.25 -76.598,159.25 -76.714,159.25 -76.83,159.225 -76.83,159.2 -76.83,159.175 -76.83,159.15 -76.83,159.125 -76.83,159.1 -76.83,159.075 -76.83,159.05 -76.83,159.025 -76.83,159 -76.83,159 -76.714,159 -76.598,159 -76.482,159 -76.366,159 -76.25,159 -76.134,159 -76.018,159 -75.902,159 -75.786,159 -75.67))"], "date_created": "Thu, 24 Oct 2013 00:00:00 GMT", "description": "This data set includes stable water isotope values at 10 m resolution along an approximately 5 km transect through the main icefield of the Allan Hills Blue Ice Area, and at 15 cm within a 225 m core drilled at the midpoint of the transect.", "east": 159.25, "geometry": ["POINT(159.125 -76.25)"], "keywords": "Allan Hills; Antarctica; Chemistry:ice; Chemistry:Ice; Geochemistry; Glaciers/ice Sheet; Glaciers/Ice Sheet; Glaciology; Isotope", "locations": "Allan Hills; Antarctica", "north": -75.67, "nsf_funding_programs": "Antarctic Glaciology", "persons": "Kurbatov, Andrei V.; Spaulding, Nicole; Mayewski, Paul A.; Introne, Douglas", "project_titles": "Collaborative Research: Exploring A 2 Million + Year Ice Climate Archive-Allan Hills Blue Ice Area (2MBIA); Collaborative research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area ", "projects": [{"proj_uid": "p0000046", "repository": "USAP-DC", "title": "Collaborative Research: Exploring A 2 Million + Year Ice Climate Archive-Allan Hills Blue Ice Area (2MBIA)"}, {"proj_uid": "p0010253", "repository": "USAP-DC", "title": "Collaborative research: Snapshots of Early and Mid-Pleistocene Climate and Atmospheric Composition from the Allan Hills Blue Ice Area "}], "repo": "USAP-DC", "repositories": "USAP-DC", "science_programs": "Allan Hills", "south": -76.83, "title": "Allan Hills Stable Water Isotopes", "uid": "609541", "west": 159.0}]

View results on map Help on results map