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

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Identification Information:

Dataset Identifier:

NSIDC-0292

Citation:

Citation Information:

Originator: John W. Holt
Publication Date: 20061025
Title: Subglacial Topography: Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica
Publication Information:
Publication Place: Boulder, Colorado USA
Publisher: NSIDC: National Snow and Ice Data Center
Online Linkage: http://nsidc.org/data/nsidc-0292.html
Online Linkage: http://dx.doi.org/10.7265/N59W0CDC

Description:

Abstract:

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.

Purpose: scientific research

Documentation:

User's Guide:

Citation Information:

Originator: John W. Holt
Publication Date: 20061025
Title: Subglacial Topography: Airborne Geophysical Survey of the Amundsen Sea Embayment, Antarctica
Publication Information:
Publication Place: Boulder, Colorado USA
Publisher: NSIDC: National Snow and Ice Data Center
Online Linkage: http://nsidc.org/data/docs/agdc/nsidc0292_holt/index.html

Time Period of Content:

Time Period Information:

Range of Dates/Times:

Beginning Date: 20041101
Ending Date: 20050331

Currentness Reference: publication date

Status:

Progress: Complete
Maintenance and Update Frequency: Unknown

Spatial Domain:

Bounding Coordinates:

 

West Bounding Coordinate: -134.9°
East Bounding Coordinate: -84.5°
North Bounding Coordinate: -71.7°
South Bounding Coordinate: -81.7°

Keywords:

Theme:

Theme Keyword Thesaurus: NASA Global Change Master Directory (GCMD) Science Keywords
Theme Keyword: EARTH SCIENCE Cryosphere Glaciers/Ice Sheets Glacier Topography/Ice Sheet Topography
Theme Keyword: EARTH SCIENCE Cryosphere Snow/Ice Ice Depth/Thickness
Theme Keyword: EARTH SCIENCE Land Surface Topography Terrain Elevation
Theme Keyword: EARTH SCIENCE Oceans Bathymetry/Seafloor Topography Seafloor Topography
Theme Keyword: EARTH SCIENCE Terrestrial Hydrosphere Glaciers/Ice Sheets Glacier Topography/Ice Sheet Topography
Theme Keyword: EARTH SCIENCE Terrestrial Hydrosphere Snow/Ice Ice Depth/Thickness

Theme:

Theme Keyword Thesaurus: None
Theme Keyword:

Theme:

Theme Keyword Thesaurus: NASA Global Change Master Directory (GCMD) Instrument Keywords
Theme Keyword: GPS Global Positioning System
Theme Keyword: RADAR Radio Detection and Ranging
Theme Keyword: RADAR ECHO SOUNDERS

Theme:

Theme Keyword Thesaurus: NASA Global Change Master Directory (GCMD) Platform Keywords
Theme Keyword: AIRCRAFT

Theme:

Theme Keyword Thesaurus: ISO 19115 Topic Categories
Theme Keyword: climatologyMeteorologyAtmosphere
Theme Keyword: geoscientificinformation

Theme:

Theme Keyword Thesaurus: None
Theme Keyword: AGDC
Theme Keyword: Airborne geophysical survey of the Amundsen Sea Embayment, Antarctica (AGASEA)
Theme Keyword: Amundsen Basin
Theme Keyword: Amundsen Sea Embayment
Theme Keyword: Antarctica
Theme Keyword: Ice Sheet Elevation
Theme Keyword: Pine Island Glacier
Theme Keyword: Subglacial Topography
Theme Keyword: Thwaites Glacier
Theme Keyword: WAIS
Theme Keyword: West Antarctica
Theme Keyword: West Antarctic Ice Sheet

Place:

Place Keyword Thesaurus: NASA Global Change Master Directory (GCMD) Location Keywords
Place Keyword: Continent Antarctica Amundsen Sea Embayment

Access Constraints:

None

Use Constraints:

None

Point of Contact:

Contact Information:

Contact Person Primary:

Contact Person: NSIDC User Services
Contact Organization: National Snow and Ice Data Center

Contact Address:

Address Type: mailing
Address:
  • CIRES, 449 UCB
  • University of Colorado
City: Boulder
State or Province: CO
Postal Code: 80309-0449
Country: USA

Contact Voice Telephone: 1 303 492-6199 x
Contact Facsimile Telephone: 1 303 492-2468 x
Contact Electronic Mail Address: nsidc@nsidc.org

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Distribution Information:

Distributor:

Contact Information:

Contact Organization Primary:

Contact Organization: National Snow and Ice Data Center
Contact Person: NSIDC User Services

Contact Address:

Address Type: mailing
Address:
  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado
City: Boulder
State or Province: CO
Postal Code: 80309-0449
Country: USA

Contact Voice Telephone: 1 303 492-6199
Contact Facsimile Telephone: 1 303 492-2468
Contact Electronic Mail Address: nsidc@nsidc.org

Resource Description:

NSIDC-0292

Distribution Liability:

NSIDC cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NSIDC makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.

Standard Order Process:

Digital Form:

Digital Transfer Information:

Format Name: Binary

Digital Transfer Option:

Online Option:

Computer Contact Information:

Network Address:

Network Resource Name: Click here.

Fees: None

Standard Order Process:

Digital Form:

Digital Transfer Information:

Format Name: ASCII Text (.txt)

Digital Transfer Option:

Online Option:

Computer Contact Information:

Network Address:

Network Resource Name: Click here.

Fees: None

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Metadata Reference Information:

Metadata Date:

20140314

Metadata Review Date:

20140314

Metadata Contact:

Contact Information:

Contact Person Primary:

Contact Person: NSIDC User Services
Contact Organization: National Snow and Ice Data Center

Contact Address:

Address Type: mailing
Address:
  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado
City: Boulder
State or Province: CO
Postal Code: 80309-0449
Country: USA

Contact Voice Telephone: 1 303 492-6199
Contact Facsimile Telephone: 1 303 492-2468
Contact Electronic Mail Address: nsidc@nsidc.org

Metadata Standard Name:

FGDC Content Standard for Digital Geospatial Metadata: Extensions for Remote Sensing Metadata

Metadata Standard Version:

FGDC-STD-012-2002

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Metadata Views

FGDC Text-Only

Federal Geographic Data Committee (FGDC) in plain text

FGDC XML

Federal Geographic Data Committee (FGDC) in Extensible Markup Language (XML)

DIF HTML

NASA Global Change Master Directory (GCMD) Directory Interchange Format (DIF)

ISO HTML

International Organization for Standardization (ISO) 19115:2003 Geographic Information Metadata