Assessment of the importance of ice-shelf buttressing to ice-sheet flow

被引：348

作者：

Dupont, TK ^{[1
]}

Alley, RB

机构：

[1] Penn State Univ, Dept Geosci, University Pk, PA 16802 USA

[2] Penn State Univ, EMS Earth & Environm Syst Inst, University Pk, PA 16802 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2005年 / 32卷 / 04期

关键词：

D O I：

10.1029/2004GL022024

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Reduction or loss of a restraining ice shelf will cause speed-up of flow from contiguous ice streams, contributing to sea-level rise, with greater changes from ice streams that are wider, have stickier beds, or have higher driving stress. Loss of buttressing offsetting half of the tendency for ice-stream/ ice-shelf spreading for an ice stream similar to Pine Island Glacier, West Antarctica is modeled to contribute at least 1 mm of sea-level rise over a few decades. These results come from a new, simple model that includes relevant stresses in a boundary-layer formulation, and allows rapid estimation of ice-shelf impacts for a wide range of configurations.

引用

页码：1 / 4

页数：4

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