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  • Subglacial Topography: Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica, Version 1

    Metadata Updated: November 12, 2020

    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.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Created Date November 12, 2020
    Metadata Updated Date November 12, 2020

    Metadata Source

    Harvested from NASA Data.json

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date November 12, 2020
    Metadata Updated Date November 12, 2020
    Publisher National Snow and Ice Data Center
    Unique Identifier Unknown
    Maintainer
    Identifier C1386204208-NSIDCV0
    Data First Published 2004-11-01
    Language en-US
    Data Last Modified 2005-03-31
    Category geospatial
    Public Access Level public
    Bureau Code 026:00
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://data.nasa.gov/data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Citation Subglacial Topography: Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica, Version 1. Version 1. Archived by National Aeronautics and Space Administration, U.S. Government, National Snow and Ice Data Center. https://doi.org/doi:10.7265/N59W0CDC.
    Homepage URL https://doi.org/doi:10.7265/N59W0CDC
    Metadata Type geospatial
    Program Code 026:001
    Source Datajson Identifier True
    Source Hash 4b36a49bc7960937c08ed0b80813595b299aebb1
    Source Schema Version 1.1
    Spatial -134.9 -81.7 -84.5 -71.7
    Temporal 2004-11-01T00:00:00Z/2005-03-31T23:59:59.999Z

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