IRREGULAR OSCILLATIONS OF THE WEST ANTARCTIC ICE-SHEET

被引：151

作者：

MACAYEAL, DR

机构：

[1] Department of Geophysical Sciences, University of Chicago, Chicago, IL 60637

来源：

NATURE | 1992年 / 359卷 / 6390期

关键词：

D O I：

10.1038/359029a0

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：

Model simulations of the West Antarctic ice sheet suggest that sporadic, perhaps chaotic, collapse (complete mobilization) of the ice sheet occurred throughout the past one million years. The irregular behaviour is due to the slow equilibration time of the distribution of basal till, which lubricates ice-sheet motion. This nonlinear response means that predictions of future collapse of the ice sheet in response to global warming must take into account its past history, and in particular whether the present basal till distribution predisposes the ice sheet towards rapid change.

引用

页码：29 / 32

页数：4

共 26 条

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