Role of small ice shelves in sea-level rise

被引:27
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
关键词
D O I
10.1029/2005GL025665
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
Recent observations show marked acceleration and thinning of tributary ice streams following shrinkage or loss of a few of the many small ice shelves that ring Antarctica and Greenland. Our model experiments, which adopt a simplified geometry, show that calving from or partial disintegration of a small ice shelf has more effect on tributary ice streams than does loss of a berg of equal length from a larger ice shelf. Our results, which are consistent with the recent observations, indicate that even small ice shelves can provide important restraint on tributary flow from ice sheets, implying that characterization and modeling of the full range of ice shelves will be required for accurate projection of ice-sheet changes and their influence on sea level.
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页数:4
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