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Compilation of Antarctic Radar Data, Siple Coast, 2000-2002

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Entry ID

NSIDC-0274

Summary

These data consist of ground-based, ice-penetrating radar profiles across satellite-detected lineations and terrains that were taken in the lower reaches of Ross Ice Stream C, also known as the Kamb Ice Stream (KIS); on Roosevelt Island; on the Siple Dome; and on the Shabtaie Ice Ridge. Researchers collected low frequency (2 MHz - 7 MHz) data during two separate deployments, 11 November through 7 December 2000 and 3 January through 28 January 2002. These radar data provide information on surface morphology and internal layer stratigraphy. The data are in the form of raw binary data files, accompanied by processed data files in JPEG format.

These data are from a study of the scar-like features that are well known from the Siple Coast ice stream system in West Antarctica. The objective of the field work was to identify the nature of several scars, and to further characterize previously-identified margin scars that have been poorly dated. Advanced Very High Resolution Radiometer (AVHRR) and Radarsat image data, which are not included in this data set, were used to locate and map the features, and place them in a regional context. The study describes the recent history of the Siple Coast glaciers and investigates the causes of their changes in configuration. The main investigative tools were ground penetrating radar (GPR) profiles used to image internal layers and measure the depths to buried crevasses or disrupted layering. This, coupled with accumulation rates determined from shallow ice cores, provides 'shutdown' ages for the margin features. The field data provide input parameters for simple models of ice flow for margins and inter-ice stream ridges during active shearing and after shutdown. Such modeling will output an estimate of the initial elevation of scars and the corresponding ice stream elevation at the time of shutdown.

Geographic Coverage

 

Spatial Coordinates:
N: -81°     S: -84°     E: -134°     W: -158°    

Data Set Citation

Dataset Creator: Howard Conway
Dataset Title: Compilation of Antarctic Radar Data, Siple Coast, 2000-2002
Dataset Release Date: 2005-12-15
Dataset Release Place: Boulder, Colorado USA
Dataset Publisher: NSIDC: National Snow and Ice Data Center
Online Resource: http://nsidc.org/data/nsidc-0274.html
Dataset DOI: http://dx.doi.org/10.7265/N5736NTS

Temporal Coverage

Start Date: 2002-01-03
Stop Date: 2002-01-28

Start Date: 2000-11-11
Stop Date: 2000-12-07

Location Keywords

  • CONTINENT ANTARCTICA

Science Keywords

  • Cryosphere Glaciers/Ice Sheets Glacier Motion/Ice Sheet Motion
  • Cryosphere Glaciers/Ice Sheets Ice Sheets
  • Cryosphere Sea Ice Ice Floes
  • Cryosphere Snow/Ice Snow Stratigraphy
  • Oceans Sea Ice Ice Floes
  • Terrestrial Hydrosphere Snow/Ice Snow Stratigraphy

Ancillary Keywords

  • AGDC
  • Antarctic Ice Sheet
  • Ice Floe
  • Ice Flow
  • Ice Penetrating Radar
  • Ice Stratigraphy
  • Ice Stream
  • NSIDC > National Snow and Ice Data Center
  • Office of Polar Programs
  • Radar
  • Siple Coast
  • Siple Dome
  • West Antarctic Ice Sheet

ISO Topic Category (View Definitions)

  • Climatology/Meteorology/Atmosphere

Platform

  • GROUND-BASED OBSERVATIONS

Instrument

  • GPR Ground Penetrating Radar

Quality

Error in the measurements arises from three main sources:

* the migration technique (See Processing Steps (http://nsidc.org/data/docs/agdc/nsidc0274_conway/index.html#processingstep).) * uncertainty picking the location of the bed reflection * uncertainty in the radio wave velocity within the glacier.

For these measurements the investigators estimate the uncertainty in ice thickness to be approximately 5 m.

Data Set Progress

in work

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 Media: FTP
Distribution Size: 16 - 1638.4 KB
Distribution Format: Binary

Distribution Media: FTP
Distribution Size: 226 - 397 KB
Distribution Format: Joint Photographic Expert Group (JPEG) (.jpg)

Personnel

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

Howard Conway
Role: INVESTIGATOR
Phone: 1 206 543-1190
Email: conway@ess.washington.edu
Contact Address:

  • University of Washington
  • Department of Earth and Space Sciences
  • Department of Earth and Space Sciences
  • University of Washington
  • 63 Johnson Hall, Box 351310

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

Ginny Catania
Role: INVESTIGATOR
Contact Address:

  • University of Texas
  • Institute of Geophysics
  • J.J. Pickle Research Campus, Bldg. 196
  • 10100 Burnet Road (R2200)

City: Austin
Province or State: TX
Postal Code: 78758
Country: USA

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 PROJECT HOME PAGE
WAISCORES: Deep Ice Coring in West Antarctica

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

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

Reference

Anandakrishnan, S., R. B. Alley, R. W. Jacobel, and H. Conway. 2000. The flow regime of Ice Stream C and hypotheses concerning its recent stagnation. Antarctic Research Series 77, 283-296.

Catania, G., H. Conway, C. Raymond, and T. Scambos. 2004. Surface morphology and internal layer stratigraphy in the downstream end of Kamb Ice Stream, West Antarctica. Journal of Glaciology. In press.

Catania, G., H. Conway, C. Raymond, and T. Scambos. 2004. Evidence for grounding-line fluctuations prior to the stagnation of Kamb Ice Stream, West Antarctica. Journal of Geophysical Research: Earth Surface. Submitted.

Catania, G., H. Conway, A. Gades, C. Raymond, and H. Engelhardt. 2003. Bed reflectivity beneath inactive ice streams in West Antarctica. Annals of Glaciology 36, 287-291.

Conway, H., G. Catania, C. Raymond, A. Gades, T. Scambos, and H. Engelhardt. 2002. Switch of flow direction of an Antarctic ice stream. Nature 419, 465-467.

Jones, F., B. Narod and G. K. C. Clarke. 1989. Design and operation of a portable, digital impulse radar. Journal of Glaciology 35(119), 143-148.

Ng, F. and H. Conway. 2004. Fast-flow signature in the stagnated Kamb Ice Stream, West Antarctica. Geology 32(6), 481-484. doi: 10.1130/G20317.1

Parizek, B., R .B. Alley, S. Anandakrishnan, and H. Conway. 2002. Sub-catchment melt and long-term stability of Ice Stream D, West Antarctica. Geophysical Research Letters doi: 10.1029/2001GL014240.

Waddington, E. D., H. Conway, E. Steig, R. B. Alley, E. J. Brook, K. C. Taylor, and J. W. C. White. 2005. Decoding the dipstick: thickness of Siple Dome, West Antarctica, at the last glacial maximum. Geology 33(4), 281-284.

Watts, R. D. and D. L. Wright. 1981. Systems for measuring thickness of temperate and polar ice from the ground or from the air. Journal of Glaciology 27(97), 459-469.

Metadata Name and Version

Metadata Name: CEOS IDN DIF
Metadata Version: 9.7

Creation and Review Dates

DIF Creation Date: 2005-12-15
Last DIF Revision Date: 2014-03-14

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