SATELLITE-IMAGE-DERIVED VELOCITY-FIELD OF AN ANTARCTIC ICE STREAM

被引：148

作者：

BINDSCHADLER, RA ^{[1
]}

SCAMBOS, TA ^{[1
]}

机构：

[1] ST SYST CORP,LANHAM,MD 20706

来源：

SCIENCE | 1991年 / 252卷 / 5003期

关键词：

D O I：

10.1126/science.252.5003.242

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The surface velocity of a rapidly moving ice stream has been determined to high accuracy and spatial density with the use of sequential satellite imagery. Variations of ice velocity are spatially related to surface undulations, and transverse velocity variations of up to 30 percent occur. Such large variations negate the concept of plug flow and call into question earlier mass-balance calculations for this and other ice streams where sparse velocity data were used. The coregistration of images with the use of the topographic undulations of the ice stream and the measurement of feature displacement with cross-correlation of image windows provide significant improvements in the use of satellite imagery for ice-flow determination.

引用

页码：242 / 246

页数：5

共 23 条

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