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Passive microwave-derived snow melt regions on the Greenland ice sheet (1995)

Abdalati, Waleed ; Steffen, Konrad

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Publication Date: 2019-08-28

Description: By 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.

Keywords: GEOPHYSICS

Type: Geophysical Research Letters (ISSN 0094-8276); 22; 7; p. 787-790

Format: text

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