[ISO_Topic_Category='IMAGERY/BASE MAPS/EARTH COVER']
Greenland Ice Sheet Melt Characteristics Derived from Passive Microwave DataEntry ID: NSIDC-0218
Abstract: 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.
Data Set Citation
Dataset Originator/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: National Snow and Ice Data Center (NSIDC)
Data Presentation Form: digital mediaOnline Resource: http://nsidc.org/data/nsidc-0218.html
Start Date: 1979-04-02
Latitude Resolution: 25 km
Longitude Resolution: 25 km
Data Set Progress
Email: waleed.abdalati at colorado.edu
University of Colorado-Boulder/ CIRES Director of ESOC/Associate Professor of Geography
Province or State: CO
Postal Code: 80309
Role: TECHNICAL CONTACT
Phone: +1 (303) 492-6199
Fax: +1 (303) 492-2468
Email: nsidc at nsidc.org
National Snow and Ice Data Center CIRES, 449 UCB University of Colorado
Province or State: CO
Postal Code: 80309-0449
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.
Extended Metadata Properties
(Click to view more)
Creation and Review Dates
DIF Creation Date: 2008-02-19
Last DIF Revision Date: 2012-05-14