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

被引：41
作者：
Lubin, Dan [1 ]
Wittenmyer, Robert A. [4 ]
Bromwich, David H. [3 ]
Marshall, Gareth J. [2 ]
机构：
[1] Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA
[2] British Antarctic Survey, Cambridge CB3 0ET, England
[3] Ohio State Univ, Byrd Polar Res Ctr, Columbus, OH 43210 USA
[4] Univ Texas Austin, Dept Astron, Austin, TX 78712 USA
来源：
GEOPHYSICAL RESEARCH LETTERS | 2008年 / 35卷 / 02期
基金：
英国自然环境研究理事会;
关键词：
D O I：
10.1029/2007GL032170
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
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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页数：4
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