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Passive microwave-derived snow melt regions on the Greenland ice sheetBy comparing data from the Special Sensor Microwave Imager (SSM/I) to field data, a melt threshold of the cross-polarized gradient ratio (XPGR), which is a normalized difference between the 19 GHz horizontally-polarized and 37 GHz vertically polarized brightness temperatures, is determined. This threshold, XPGR = -0.025, is used to classify dry and wet snow. The annual areal extent of melt is mapped for the years 1988 through 1991, and inter-annual variations of melt extent are examined. The results show that the melt extent varied from a low of 38.3% of the ice sheet (1990) to a high of 41.7% (1991) during the years 1988-1991.
Document ID
19950056373
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Abdalati, Waleed
(University of Colorado, Boulder, CO United States)
Steffen, Konrad
(University of Colorado, Boulder, CO United States)
Date Acquired
August 16, 2013
Publication Date
April 1, 1995
Publication Information
Publication: Geophysical Research Letters
Volume: 22
Issue: 7
ISSN: 0094-8276
Subject Category
Geophysics
Accession Number
95A87972
Funding Number(s)
CONTRACT_GRANT: NAGW-2158
Distribution Limits
Public
Copyright
Other

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