RADAR MEASUREMENTS OF MELT ZONES ON THE GREENLAND ICE-SHEET

被引：66

作者：

JEZEK, KC ^{[1
]}

GOGINENI, P ^{[1
]}

SHANABLEH, M ^{[1
]}

机构：

[1] UNIV KANSAS,RADAR SYST & REMOTE SENSING LAB,LAWRENCE,KS 66045

来源：

GEOPHYSICAL RESEARCH LETTERS | 1994年 / 21卷 / 01期

关键词：

D O I：

10.1029/93GL03377

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Surface-based microwave radar measurements were performed at a location on the western flank of the Greenland Ice Sheet. Here, firn metamorphosis is dominated by seasonal melt, which leads to marked contrasts in the vertical structure of winter and summer firn. This snow regime is also one of the brightest radar targets on Earth with an average backscatter coefficient of 0 dB at 5.3 GHz and an incidence angle of 25-degrees. By combining detailed observations of firn physical properties with ranging radar measurements we find that the glaciological mechanism associated with this strong electromagnetic response is summer ice lens formation within the previous winter's snow pack. This observation has important implications for monitoring and understanding changes in ice sheet volume using spaceborne microwave sensors.

引用

页码：33 / 36

页数：4

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