Positive mass balance of the Ross Ice Streams, West Antarctica

被引：149

作者：

Joughin, I

Tulaczyk, S

机构：

[1] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[2] Univ Calif Santa Cruz, Dept Earth Sci, Santa Cruz, CA 95064 USA

来源：

SCIENCE | 2002年 / 295卷 / 5554期

关键词：

D O I：

10.1126/science.1066875

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：

We have used ice-flow velocity measurements from synthetic aperture radar to reassess the mass balance of the Ross Ice Streams, West Antarctica. We find strong evidence for ice-sheet growth (+ 26.8 gigatons per year), in contrast to earlier estimates indicating a mass deficit (-20.9 gigatons per year), Average thickening is equal to similar to25% of the accumulation rate, with most of this growth occurring on Ice Stream C. Whillans Ice Stream, which was thought to have a significantly negative mass balance, is close to balance, reflecting its continuing slowdown. The overall positive mass balance may signal an end to the Holocene retreat of these ice streams.

引用

页码：476 / 480

页数：5

共 33 条

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ALLEY RB, 2001, ANTARCTIC RES SER, V77

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