globalchange  > 气候减缓与适应
DOI: 10.1002/grl.50990
论文题名:
North American winter-spring storms: Modeling investigation on tropical Pacific sea surface temperature impacts
作者: Basu S.; Zhang X.; Polyakov I.; Bhatt U.S.
刊名: Geophysical Research Letters
ISSN: 0094-8512
EISSN: 1944-8243
出版年: 2013
卷: 40, 期:19
起始页码: 5228
结束页码: 5233
语种: 英语
英文关键词: El Niño ; extreme weather ; global warming ; storms
Scopus关键词: Atmospheric model ; Extreme weather ; General circulation ; North American ; Regional impacts ; Sea surface temperature (SST) ; Storm activities ; Systematic changes ; Atmospheric movements ; Atmospheric temperature ; Global warming ; Oceanography ; Tropics ; Storms ; eddy covariance ; El Nino ; general circulation model ; global warming ; sea surface temperature ; storm track ; North America ; Pacific Ocean ; Pacific Ocean (Tropical)
英文摘要: An increased frequency and intensity of winter and spring storms have recently manifested over a broad area of North America - along the east coast of the U.S. especially, though global mean storm tracks are suggested to shift northward. To understand these changes, we have conducted atmospheric model experiments, examining the response of North American storm activity to the elevated tropical Pacific sea surface temperature (SST) associated with El Niño. The results indicate that, when tropical Pacific SST increases, there are more numerous intense storms over southwestern, southeastern, and northwestern North America, but fewer weaker storms over the northeast. Transient eddy analysis of the general circulation demonstrates consistent changes, suggesting systematic changes from large-scale general circulation to synoptic-scale storms. These changes can be attributed to enhanced lower tropospheric baroclinicity, to which the southward shift and an intensification of extratropical jet streams make a major contribution. Key Points Tropical Pacific SST has different regional impact on storms from global warming Tropical Pacific SST anomaly intensifies regional storm activities in U.S. Tropical Pacific SST anomaly shifts jet stream and enhances baroclinicity ©2013. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84884839508&doi=10.1002%2fgrl.50990&partnerID=40&md5=5a22732d82dc31a387801641311a1bce
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5776
Appears in Collections:气候减缓与适应

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作者单位: International Arctic Research Center, Department of Atmospheric Sciences, University of Alaska Fairbanks, 930 Koyukuk Dr., Fairbanks, AK 99775, United States

Recommended Citation:
Basu S.,Zhang X.,Polyakov I.,et al. North American winter-spring storms: Modeling investigation on tropical Pacific sea surface temperature impacts[J]. Geophysical Research Letters,2013-01-01,40(19).
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