PASSIVE MICROWAVE-DERIVED SNOW MELT REGIONS ON THE GREENLAND ICE-SHEET

被引：109

作者：

ABDALATI, W ^{[1
]}

STEFFEN, K ^{[1
]}

机构：

[1] UNIV COLORADO, DEPT GEOG, BOULDER, CO 80309 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 1995年 / 22卷 / 07期

关键词：

D O I：

10.1029/95GL00433

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

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.

引用

页码：787 / 790

页数：4

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