Antarctic Peninsula mesoscale cyclone variability and climatic impacts influenced by the SAM

Lubin  D; Wittenmyer  RA; Bromwich  DHMarshall  GJ

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Antarctic Peninsula mesoscale cyclone variability and climatic impacts influenced by the SAM

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摘要

The frequency of mesoscale cyclones in the Western Antarctic Peninsula (WAP) region during 1991-94 is correlated with the Southern Hemisphere Annular Mode (SAM) index, most strongly during winter and spring. Also, during periods of positive SAM index polarity there is a shift in the storm tracks to favor more east-bound trajectories, consistent with strengthening of circumpolar westerlies. The presence of mesoscale cyclones is associated with positive near-surface-air temperature anomalies in the WAP region year-round, largest during winter.

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来源
《Geophysical Research Letters》 |2008年第2期|2808-1-2808-4-0|共4页
作者
Lubin D; Wittenmyer RA; Bromwich DHMarshall GJ;
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作者单位

Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA;

British Antarctic Survey, Cambridge CB3 0ET, England;

Ohio State Univ, Byrd Polar Res Ctr, Columbus, OH 43210 USAUniv Texas Austin, Dept Astron, Austin, TX 78712 USA;

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原文格式 PDF
正文语种英语
中图分类地球物理学;
关键词
HEMISPHERE ANNULAR MODE; TEMPERATURES; TRENDS;

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Antarctic Peninsula mesoscale cyclone variability and climatic impacts influenced by the SAM

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