Entry_ID: NSIDC-0303
Entry_Title: Radar Investigations of Antarctic Ice Stream Margins, Siple Dome, 1998
Group: 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
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Nadine
   Middle_Name: A.
   Last_Name: Nereson
   Email: nadine@geophys.washington.edu
   Phone: 1 206 543-0162 
   Group: Contact_Address
      Address: University of Washington
      Address: Department of Earth and Space Sciences
      Address: Box 35130
      Address: University of Washington
      City: Seattle
      Province_or_State: WA
      Postal_Code: 98195-1310
      Country: USA
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Charles
   Last_Name: Raymond
   Group: Contact_Address
      Address: University of Washington
      Address: University of Washington
      Address: Geophysics Program Box 351650
      City: Seattle
      Province_or_State: WA
      Postal_Code: 98195
   End_Group
End_Group
Group: Personnel
   Role: Technical Contact
   First_Name: NSIDC
   Last_Name: User Services
   Email: nsidc@nsidc.org
   Phone: 1 303 492-6199 x
   Fax: 1 303  492-2468 x
   Group: Contact_Address
      Address: National Snow and Ice Data Center
      Address: CIRES, 449 UCB
      Address: University of Colorado
      City: Boulder
      Province_or_State: CO
      Postal_Code: 80309-0449
      Country: USA
   End_Group
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Spectral/Engineering
   Term: Radar
   Variable_Level_1: Radar Imagery
   Detailed_Variable: Bed, Surface, and Internal Layer Geometry
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Spectral/Engineering
   Term: Radar
   Variable_Level_1: Radar Reflectivity
   Detailed_Variable: Bed Reflectivity
End_Group
ISO_Topic_Category: Climatology/Meteorology/Atmosphere
Keyword: Antarctica
Keyword: Bed Geometry
Keyword: Bed Reflectivity
Keyword: Engelhardt Ridge
Keyword: GPR
Keyword: GPS
Keyword: Ice Stream
Keyword: Ice Stream Margins
Keyword: Internal Layer Geometry
Keyword: internal layering
Keyword: MacAyeal Ice Stream
Keyword: Radar
Keyword: Shabtaie Ridge
Keyword: Siple Dome
Keyword: Surface Geometry
Keyword: Whillans Ice Stream
Sensor_Name: GPR > Ground Penetrating Radar
Sensor_Name: GPS RECEIVERS
Source_Name: GPS > Global Positioning System Satellites
Source_Name: GROUND-BASED OBSERVATIONS
Group: Temporal_Coverage
   Start_Date: 1998-11-14
   Stop_Date: 1998-12-13
End_Group
Data_Set_Progress: complete
Group: Spatial_Coverage
   Southernmost_Latitude: -83.3528
   Northernmost_Latitude: -80.1678
   Westernmost_Longitude: -141.6722
   Easternmost_Longitude: -138.3697
   Minimum_Altitude: 322.703 meters
   Maximum_Altitude: 560.816 meters
End_Group
Group: Location
   Location_Category: CONTINENT
   Location_Type: ANTARCTICA
   Detailed_Location: SIPLE DOME
End_Group
Group: 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.

End_Group
Data_Set_Language: English
Originating_Center: AGDC
Group: Data_Center
   Data_Center_Name: NSIDC > National Snow and Ice Data Center
   Data_Center_URL: http://nsidc.org
   Group: Personnel
      Role: Data Center Contact
      First_Name: NSIDC
      Last_Name: User Services
      Email: nsidc@nsidc.org
      Phone: 1 303 492-6199 
      Fax: 1 303  492-2468 
      Group: Contact_Address
         Address: National Snow and Ice Data Center
         Address: CIRES, 449 UCB
         Address: University of Colorado
         City: Boulder
         Province_or_State: CO
         Postal_Code: 80309-0449
         Country: USA
      End_Group
   End_Group
End_Group
Group: Data_Center
   Data_Center_Name: AGDC > Antarctic Glaciological Data Center
   Data_Center_URL: http://nsidc.org/agdc/
   Group: Personnel
      Role: Data Center Contact
      First_Name: AGDC
      Last_Name: User Services
      Email: nsidc@nsidc.org
      Phone: 1 303 492-6199 x
      Fax: 1 303  492-2468 x
      Group: Contact_Address
         Address: National Snow and Ice Data Center
         Address: CIRES, 449 UCB
         Address: University of Colorado
         City: Boulder
         Province_or_State: CO
         Postal_Code: 80309-0449
         Country: USA
      End_Group
   End_Group
End_Group
Group: Distribution
   Distribution_Format: MATLAB
End_Group
Group: Distribution
   Distribution_Format: Microsoft Word
End_Group
Group: Distribution
   Distribution_Format: PDF
End_Group
Group: Distribution
   Distribution_Format: Binary
End_Group
Group: Distribution
   Distribution_Media: FTP
   Distribution_Size: 519 MB
End_Group
Group: Distribution
   Distribution_Format: ASCII Text (.txt)
End_Group
Group: 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.

End_Group
Group: 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.

End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW RELATED INFORMATION
   End_Group
   URL: http://nsidc.org/data/nsidc-0274.html
   Description: Compilation of Antarctic Radar Data, Siple Coast, 2000-2002
End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW RELATED INFORMATION
   End_Group
   URL: http://nsidc.org/data/nsidc-0282.html
   Group: Description

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

   End_Group
End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW RELATED INFORMATION
   End_Group
   URL: http://nsidc.org/data/nsidc-0141.html
   Description: Ice Motion and Topography Near Margin Areas of Kamb Ice Stream, Antarctica
End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW RELATED INFORMATION
   End_Group
   URL: http://nsidc.org/data/nsidc-0264.html
   Group: Description

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

   End_Group
End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW RELATED INFORMATION
   End_Group
   URL: http://nsidc.org/data/nsidc-0085.html
   Description: Siple Dome Glaciology and Ice Stream History 1994, 1996
End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW RELATED INFORMATION
   End_Group
   URL: http://nsidc.org/data/nsidc-0269.html
   Group: Description

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

   End_Group
End_Group
IDN_Node: AMD/US
Metadata_Name: CEOS IDN DIF
Metadata_Version: 9.7
DIF_Creation_Date: 2007-07-06
Last_DIF_Revision_Date: 2014-03-14
DIF_Revision_History: Removed USADCC logo for Search cleanup.