Entry_ID: NSIDC-0218
Entry_Title: Greenland Ice Sheet Melt Characteristics Derived from Passive Microwave Data
Group: Data_Set_Citation
   Dataset_Creator: Waleed Abdalati
   Dataset_Title: Greenland Ice Sheet Melt Characteristics Derived from Passive Microwave Data
   Dataset_Release_Date: 2008-02-25
   Dataset_Release_Place: Boulder, Colorado USA
   Dataset_Publisher: NSIDC: National Snow and Ice Data Center
   Online_Resource: http://nsidc.org/data/nsidc-0218.html
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Waleed
   Last_Name: Abdalati
   Email: waleed.abdalati@colorado.edu
   Group: Contact_Address
      Address: University of Colorado-Boulder/ CIRES
      Address: Director of ESOC/Associate Professor of Geography
      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: Snow/Ice
   Variable_Level_1: Snow Melt
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Snow/Ice
   Variable_Level_1: Snow Melt
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Terrestrial Hydrosphere
   Term: Snow/Ice
   Variable_Level_1: Snow Melt
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Terrestrial Hydrosphere
   Term: Snow/Ice
   Variable_Level_1: Snow Melt
End_Group
ISO_Topic_Category: Geoscientific Information
ISO_Topic_Category: Imagery/Base Maps/Earth Cover
Keyword: Greenland
Keyword: Ice Sheet
Keyword: PARCA
Keyword: Passive Microwave
Keyword: Passive Microwave Data
Keyword: Polar Stereographic
Keyword: SMMR
Keyword: Snow Melt
Keyword: SSM/I
Sensor_Name: SMMR > Scanning Multichannel Microwave Radiometer
Sensor_Name: SSM/I > Special Sensor Microwave/Imager
Source_Name: DMSP 5D-2/F11 > Defense Meteorological Satellite Program-F11
Source_Name: DMSP 5D-2/F13 > Defense Meteorological Satellite Program-F13
Source_Name: DMSP 5D-2/F8 > Defense Meteorological Satellite Program-F8
Source_Name: NIMBUS-7
Source_Name: SATELLITES
Group: Temporal_Coverage
   Start_Date: 1979-04-02
   Stop_Date: 2007-12-31
End_Group
Data_Set_Progress: in work
Group: Spatial_Coverage
   Southernmost_Latitude: 60
   Northernmost_Latitude: 84
   Westernmost_Longitude: -73
   Easternmost_Longitude: -10
End_Group
Group: Location
   Location_Category: CONTINENT
   Location_Type: NORTH AMERICA
   Location_Subregion1: GREENLAND
End_Group
Group: Data_Resolution
   Latitude_Resolution: 25 km
   Longitude_Resolution: 25 km
   Temporal_Resolution: 29 years
End_Group
Group: Data_Resolution
   Latitude_Resolution: 25 km
   Longitude_Resolution: 25 km
End_Group
Group: Data_Resolution
   Latitude_Resolution: 25 km
   Longitude_Resolution: 25 km
   Temporal_Resolution: 1 year
End_Group
Project: PARCA > Program in Arctic Regional Climate Assessment
Data_Set_Language: English
Group: Data_Center
   Data_Center_Name: NASA DAAC > NASA DAAC at the National Snow and Ice Data Center
   Data_Center_URL: http://nsidc.org/daac/index.html
   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: 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: Distribution
   Distribution_Media: FTP
   Distribution_Size: 13 KB
   Distribution_Format: Binary
End_Group
Group: Distribution
   Distribution_Media: FTP
   Distribution_Size: 0 - 16 KB
   Distribution_Format: ASCII Text (.txt)
End_Group
Group: Distribution
   Distribution_Media: FTP
   Distribution_Size: 2 - 4 KB
   Distribution_Format: Geographic Tagged Image File Format (GeoTIFF) (.geotiff)
End_Group
Group: Reference

   Abdalati, Waleed and Konrad Steffen. 2001. Greenland Ice Sheet Melt Extent: 
   1979-1999. Journal of Geophysical Research (Atmospheres) 106(D24): 33983-8.   
   Abdalati, Waleed and Konrad Steffen. 1997. Snowmelt on the Greenland Ice Sheet 
   as Derived from Passive Microwave Satellite Data. Journal of Climate 10: 
   165-75. 

   Abdalati, Waleed and Konrad Steffen. 1995. Passive Microwave-derived Snow Melt 
   Regions on the Greenland Ice Sheet. Geophysical Research Letters 22: 787-790.  
    Abdalati, Waleed and J. Stroeve. 1993. Climate Sensitivity Studies of the 
   Greenland Ice Sheet Using Satellite AVHRR, SMMR, SSM/I, and In Situ Data. 
   Meteorology and Atmospheric Physics 51: 239-258. 

   Jezek, K. C., C. Merry, D. Cavalieri, S. Grace, J. Bedner, D. Wilson, and D. 
   Lampkin. 1991. Comparison Between SMMR and SSM/I Passive Microwave Data 
   Collected Over the Antarctic Ice Sheet. Byrd Polar Research Center Technical 
   Report 91-03, Ohio State University, Columbus OH, 62 pp.

   Mätzler, C. H. and R. Hüppi. 1989. Review of Signature Studies for Microwave 
   Remote Sensing of Snowpacks. Advances in Space Research 9: 253-265. 

   Ulaby, F. T., R. K. Moore, and A. K. Fung. 1982. Radar Remote Sensing and 
   Surface Scattering and Emission Theory. Microwave Remote Sensing. Vol. 2, 
   Artech House.

   Ulaby, F. T., R. K. Moore, and A. K. Fung. 1986. From Theory to Applications. 
   Microwave Remote Sensing. Vol. 3, Artech House.

End_Group
Group: Summary

   The Greenland ice sheet melt extent data, acquired as part of the NASA Program 
   for Arctic Regional Climate Assessment (PARCA), is a daily (or every other 
   day, prior to August 1987) estimate of the spatial extent of wet snow on the 
   Greenland ice sheet since 1979. It is derived from passive microwave satellite 
   brightness temperature characteristics using the Cross-Polarized Gradient 
   Ratio (XPGR) of Abdalati and Steffen (1997). It is physically based on the 
   changes in microwave emission characteristics observable in data from the 
   Scanning Multi-channel Microwave Radiometer (SMMR) and the Special Sensor 
   Microwave/Imager (SSM/I) instruments when surface snow melts. It is not a 
   direct measure of the snow wetness but rather is a binary indicator of the 
   state of melt of each SMMR and SSM/I pixel on the ice sheet for each day of 
   observation. It is, however, a useful proxy for the amount of melt that occurs 
   on the Greenland ice sheet. The data are provided in a variety of formats 
   including raw data in ASCII format, gridded daily data in binary format, and 
   annual and complete time series climatologies in gridded binary and GeoTIFF 
   format. All data are in a 60 x 109 pixel subset of the standard Northern 
   Hemisphere polar stereographic grid with a 25 km resolution and are available 
   via FTP.

End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW PROJECT HOME PAGE
   End_Group
   URL: http://nsidc.org/data/virtual_globes/
   Group: Description

      NSIDC offers some of our data in the form of images. We have created Google 
      Earth™ files that enable you to overlay these and other data-based images on a 
      virtual globe.

   End_Group
End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW PROJECT HOME PAGE
   End_Group
   URL: http://nsidc.org/data/parca/index.html
   Description: PARCA Program Web page.
End_Group
Metadata_Name: CEOS IDN DIF
Metadata_Version: 9.7
DIF_Creation_Date: 2008-02-25
Last_DIF_Revision_Date: 2013-10-03
DIF_Revision_History: Removed Map Viewer link because it was broken.