Entry_ID: NSIDC-0282
Entry_Title: GPR and GPS Data: Characteristics of Snow Megadunes and their Potential Effects on Ice Core Interpretation
Group: Data_Set_Citation
   Dataset_Creator: Ted Scambos
   Dataset_Title: GPR and GPS Data: Characteristics of Snow Megadunes and their Potential Effects on Ice Core Interpretation
   Dataset_Release_Date: 2006-06-10
   Dataset_Release_Place: Boulder, Colorado USA
   Dataset_Publisher: NSIDC: National Snow and Ice Data Center
   Online_Resource: http://nsidc.org/data/nsidc-0282.html
   Dataset DOI: http://dx.doi.org/10.7265/N5Q23X5F
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Ted
   Last_Name: Scambos
   Email: scambos@nsidc.org
   Group: Contact_Address
      Address: University of Colorado
      Address: Cooperative Institute for Research in Environmental Science
      Address: National Snow and Ice Data Center
      Address: CIRES,  449 UCB
      City: Boulder
      Province_or_State: CO
      Postal_Code: 80309-0449
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Rob
   Last_Name: Bauer
   Email: bauerr@kryos.colorado.edu
   Phone: 1 303 492 2378 
   Group: Contact_Address
      Address: University of Colorado
      Address: Cooperative Institute for Research in Environmental Sciences
      Address: University of Colorado
      Address: CIRES 449 UCB
      City: Boulder
      Province_or_State: CO
      Postal_Code: 80309
      Country: USA
   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: Cryosphere
   Term: Glaciers/Ice Sheets
   Variable_Level_1: Firn
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Glaciers/Ice Sheets
   Variable_Level_1: Ice Sheets
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Snow/Ice
   Variable_Level_1: Snow Stratigraphy
   Detailed_Variable: Internal Layering
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Land Surface
   Term: Geomorphology
   Variable_Level_1: Glacial Landforms/Processes
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Terrestrial Hydrosphere
   Term: Snow/Ice
   Variable_Level_1: Snow Stratigraphy
End_Group
ISO_Topic_Category: Climatology/Meteorology/Atmosphere
Keyword: AGDC
Keyword: Antarctica
Keyword: East  Antarctic Plateau
Keyword: Glaciology
Keyword: GPS
Keyword: GPS data
Keyword: internal layering
Keyword: Megadunes
Keyword: Paleoenvironments
Keyword: Radar
Keyword: Surface Morphology
Keyword: Surface Winds
Sensor_Name: GPR > Ground Penetrating Radar
Sensor_Name: GPS > Global Positioning System
Source_Name: GPS > Global Positioning System Satellites
Source_Name: GROUND-BASED OBSERVATIONS
Group: Temporal_Coverage
   Start_Date: 2002-12-05
   Stop_Date: 2002-12-05
End_Group
Group: Temporal_Coverage
   Start_Date: 2004-01-03
   Stop_Date: 2004-01-07
End_Group
Group: Paleo_Temporal_Coverage
   Paleo_Stop_Date: 2000 ybp
End_Group
Data_Set_Progress: complete
Group: Spatial_Coverage
   Southernmost_Latitude: -80.7802
   Northernmost_Latitude: -80.5304
   Westernmost_Longitude: 124.0218
   Easternmost_Longitude: 126.0302
End_Group
Group: Location
   Location_Category: CONTINENT
   Location_Type: ANTARCTICA
   Detailed_Location: EAST ANTARCTIC PLATEAU
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_Media: FTP
   Distribution_Size: 89.5 KB
   Distribution_Format: Microsoft Excel
End_Group
Group: Distribution
   Distribution_Media: FTP
   Distribution_Size: 28.5 KB
   Distribution_Format: ASCII Text (.txt)
End_Group
Group: Distribution
   Distribution_Media: FTP
   Distribution_Size: 0.17 - 15.7 MB
   Distribution_Format: Joint Photographic Expert Group (JPEG) (.jpg)
End_Group
Group: Reference

   Fahnestock, M. A., T. A. Scambos, C. A. Shuman, et. al. 2000. Snow megadune 
   fields on the East Antarctic Plateau: extreme atmosphere-ice interaction. 
   Geophysical Research Letters 27(22): 3719-3722.

End_Group
Group: Summary

   The Antarctic megadune research was conducted during two field seasons, one in 
   November 2002 and the other in December 2003 through January 2004. The 
   megadune field site is located on the East Antarctic Plateau, southeast of 
   Vostok station. The objectives of this multi-facetted research are to 
   determine the physical characteristics of the firn across the dunes including 
   typical climate indicators such as stable isotopes and major chemical species 
   and to install instruments to measure the time variation of near-surface wind 
   and temperature with depth, to test and refine hypotheses for megadune 
   formation. It is important to improve our current understanding of the 
   megadunes because of their extreme nature, their broad extent, and their 
   potential impact on the climate record. Megadunes are a manifestation of an 
   extreme terrestrial climate and may provide insight on past terrestrial 
   climate or on processes active on other planets.

   Snow megadunes are undulating variations in accumulation and surface texture 
   with wavelengths of 2 to 5 km and amplitudes up to 5 meters. The features 
   cover 500,000 km2 of the East Antarctic plateau, occurring in areas 
   of moderate regional slope and low accumulation on the flanks of the ice sheet 
   between 2500 and 3800 meters elevation. Landsat images and aerial photography 
   indicate the dunes consist of alternating surfaces of glaze and rough 
   sastrugi, with gradational boundaries. This pattern is oriented perpendicular 
   to the mean wind direction, as modeled in katabatic wind studies. Glaze 
   surfaces cover the leeward faces and troughs; rough sastrugi cover the 
   windward faces and crests. The megadune pattern is crossed by smooth to eroded 
   wind-parallel longitudinal dunes. Wind-eroded longitudinal dunes form 
   spectacular 1-meter-high sastrugi in nearby areas.

   This data set contains ground penetrating radar (GPR) data showing surface 
   morphology and internal layering structure along with global positioning 
   system (GPS) data collected within an area of 60 km2. GPS data are 
   provided in space-delimited ASCII text Microsoft Excel formats, while GPR data 
   are in JPEG format. Data are available via FTP.

End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW PROJECT HOME PAGE
   End_Group
   URL: http://nsidc.org/antarctica/megadunes/
   Description: Antarctic Megadunes: Research at the Edge of the Earth
End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW RELATED INFORMATION
   End_Group
   URL: http://nsidc.org/data/nsidc-0283.html
   Group: Description

      AWS Data: Characteristics of Snow Megadunes and Their Potential Effect on Ice 
      Core Interpretation

   End_Group
End_Group
IDN_Node: AMD/US
Metadata_Name: CEOS IDN DIF
Metadata_Version: 9.7
DIF_Creation_Date: 2006-06-10
Last_DIF_Revision_Date: 2014-03-14
DIF_Revision_History: Removed USADCC logo for Search cleanup.