Radar Investigations of Antarctic Ice Stream Margins, Siple Dome, 1998

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Entry ID

NSIDC-0303

Summary

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.

Geographic Coverage

 

Spatial Coordinates:
N: -80.1678°     S: -83.3528°     E: -138.3697°     W: -141.6722°     Min Altitude: 322.703 meters     Max Altitude: 560.816 meters    

Data Set Citation

Dataset Creator: Nadine A. Nereson
Dataset Title: Radar Investigations of Antarctic Ice Stream Margins, Siple Dome, 1998
Dataset Release Date: 2007-07-06
Dataset Release Place: Boulder, Colorado USA
Dataset Publisher: NSIDC: National Snow and Ice Data Center
Online Resource: http://nsidc.org/data/nsidc-0303.html
Dataset DOI: http://dx.doi.org/10.7265/N52B8VZP

Temporal Coverage

Start Date: 1998-11-14
Stop Date: 1998-12-13

Location Keywords

  • CONTINENT ANTARCTICA SIPLE DOME

Science Keywords

  • Spectral/Engineering Radar Radar Imagery Bed, Surface, and Internal Layer Geometry
  • Spectral/Engineering Radar Radar Reflectivity Bed Reflectivity

Ancillary Keywords

  • Antarctica
  • Bed Geometry
  • Bed Reflectivity
  • Engelhardt Ridge
  • GPR
  • GPS
  • Ice Stream
  • Ice Stream Margins
  • Internal Layer Geometry
  • internal layering
  • MacAyeal Ice Stream
  • Radar
  • Shabtaie Ridge
  • Siple Dome
  • Surface Geometry
  • Whillans Ice Stream

ISO Topic Category (View Definitions)

  • Climatology/Meteorology/Atmosphere

Platform

  • GPS Global Positioning System Satellites
  • GROUND-BASED OBSERVATIONS

Instrument

  • GPR Ground Penetrating Radar
  • GPS RECEIVERS

Quality

Because the airwave signal swamps the first 1 µs of the data record, the first step in data processing is to remove the mean waveform from the profile to remove the airwave effect and reveal shallow layer information in the first 1 µs. Since the GPS data have not been fully processed, absolute error in vertical elevation could be as large as 50 m, so the displayed elevation scales for the radar profiles should be considered approximate. The profiles displayed in images are based on data files that have been subjected to demeaning and filtering and would therefore not be appropriate for any analyses directed toward accurate assessment of amplitude and phase without careful consideration.

Data Set Progress

complete

Originating Center

AGDC

Data Center

National Snow and Ice Data Center
Data Center URL: http://nsidc.org

Data Center Personnel

Name: NSIDC User Services
Phone: 1 303 492-6199
Fax: 1 303 492-2468
Email: nsidc@nsidc.org
Contact Address:

  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

Antarctic Glaciological Data Center
Data Center URL: http://nsidc.org/agdc/

Data Center Personnel

Name: AGDC User Services
Phone: 1 303 492-6199 x
Fax: 1 303 492-2468 x
Email: nsidc@nsidc.org
Contact Address:

  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

Distribution

Distribution Format: MATLAB

Distribution Format: Microsoft Word

Distribution Format: PDF

Distribution Format: Binary

Distribution Media: FTP
Distribution Size: 519 MB

Distribution Format: ASCII Text (.txt)

Personnel

Nadine A. Nereson
Role: INVESTIGATOR
Phone: 1 206 543-0162
Email: nadine@geophys.washington.edu
Contact Address:

  • University of Washington
  • Department of Earth and Space Sciences
  • Box 35130
  • University of Washington

City: Seattle
Province or State: WA
Postal Code: 98195-1310
Country: USA

Charles Raymond
Role: INVESTIGATOR
Contact Address:

  • University of Washington
  • University of Washington
  • Geophysics Program Box 351650

City: Seattle
Province or State: WA
Postal Code: 98195

NSIDC User Services
Role: TECHNICAL CONTACT
Phone: 1 303 492-6199 x
Fax: 1 303 492-2468 x
Email: nsidc@nsidc.org
Contact Address:

  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

Related URL

VIEW RELATED INFORMATION
Compilation of Antarctic Radar Data, Siple Coast, 2000-2002

VIEW RELATED INFORMATION
GPR and GPS Data: Characteristics of Snow Megadunes and their Potential Effects on Ice Core Interpretation

VIEW RELATED INFORMATION
Ice Motion and Topography Near Margin Areas of Kamb Ice Stream, Antarctica

VIEW RELATED INFORMATION
Ice Thickness and Internal Layer Depth Along the 2001 and 2002 US ITASE Traverses

VIEW RELATED INFORMATION
Siple Dome Glaciology and Ice Stream History 1994, 1996

VIEW RELATED INFORMATION
US International Trans-Antarctic Scientific Expedition (US ITASE): GPR Profiles and Accumulation Mapping

Reference

Fisher, A. M., R. W. Jacobel, N. M. Sundell, and A. M. Gades 1995. Bedrock topography and internal stratigraphy of the Siple Dome summit. EOS, Transactions 76, F194.

Gades, A. M., C. F. Raymond, H. Conway, and R. W. Jacobel. 2000. Bed properties of Siple Dome and adjacent ice streams, West Antarctica, inferred from radio echo-sounding measurements. Journal of Glaciology 46, 88-94. Jacobel, R., T. Scambos, C. Raymond, and A. Gades. 1996. Changes in the configuration of Ice Stream flow from the West Antarctic Ice Sheet. Journal of Geophysical Research 101, 5499-5504.

Jacobel, R. W., T. A. Scambos, N. A. Nereson, and C. Raymond. 2000. Changes in the margin of Ice Stream C, Antarctica. Journal of Glaciology 46, 102-110.

Jacobson, H. P., and C. F. Raymond. 1998. Thermal effects on the location of ice stream margins. Journal of Geophysical Research 103, 12,111-12,122.

Nereson, N. A. 2000. Elevation of ice stream margin scars after stagnation. Journal of Glaciology 46, 111-118. Nereson, N. A., and C. F. Raymond 1995. The geometry and stratigraphy of Siple Dome and implications for its history. EOS, Transactions 76.

Nereson, N. A., C. F. Raymond, R. W. Jacobel, and E. D. Waddington. 1997. The history of the spatial accumulation pattern at Siple Dome, West Antarctica, from radar measurements. EOS Transactions, 1997 Fall Meeting Supplement 78, F252.

Nereson, N. A., C. F. Raymond, E. D. Waddington, and R. W. Jacobel. 1998. Migration of the Siple Dome ice divide, West Antarctica. Journal of Glaciology 44 , 643-652.
Raymond, C., N. Nereson, A. Gades, H. Conway, R. Jacobel, and T. Scambos. 1995. Geometry and stratigraphy of Siple Dome, Antarctica. Antarctic Journal of the United States, 1995 Review 30, 91-93.

Scambos, T., and N. Nereson. 1995. Satellite image and GPS study of the morphology of Siple Dome, Antarctica. Antarctic Journal of the United States, 1995 Review 30, 87-89.

Metadata Name and Version

Metadata Name: CEOS IDN DIF
Metadata Version: 9.7

Creation and Review Dates

DIF Creation Date: 2007-07-06
Last DIF Revision Date: 2014-03-14

Metadata Views

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ISO HTML

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

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