DOI: 10.1007/s00382-013-1687-y
Scopus记录号: 2-s2.0-84874315434
论文题名: Response of Northern Hemisphere storm tracks to Indian-western Pacific Ocean warming in atmospheric general circulation models
作者: Chu C. ; Yang X.-Q. ; Ren X. ; Zhou T.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2013
卷: 40, 期: 2017-05-06 起始页码: 1057
结束页码: 1070
语种: 英语
英文关键词: Baroclinicity
; Eddy growth rate
; Indian-western Pacific Ocean warming
; Northern Hemisphere storm tracks
英文摘要: With 40 years integration output of two atmospheric general circulation models (GAMIL/IAP and HadAM3/UKMO) forced with identical prescribed seasonally-varying sea surface temperature, this study examines the effect of the observed Indian-western Pacific Ocean (IWP) warming on the Northern Hemisphere storm tracks. Both models indicate that the observed IWP warming tends to cause both the North Pacific storm track (NPST) and the North Atlantic storm track (NAST) to move northward. Such a consistent effect on the two storm tracks is closely associated with the changes in the low-level atmospheric baroclinicity, high-level jet stream and upper-level geopotential height. The IWP warming can excite a wavelike circum-global teleconnection in the geopotential height that gives rise to an anticyclonic anomaly over the midlatitude North Pacific and a positive-phase NAO anomaly over the North Atlantic. These geopotential height anomalies tend to enhance upper-level zonal westerly winds north of the climatological jet axes and increase low-level baroclinicity and eddy growth rates, thus favoring transient eddy more active north of the climatological storm track axes, responsible for the northward shift of the both storm tracks. The IWP warming-induced northward shift of the NAST is quite similar to the observed, suggesting that the IWP warming can be one of the key factors to cause decadal northward shift of the NAST since the 1980s. However, the IWP warming-induced northward shift of the NPST is completely opposite to the observed, implying that the observed southward shift of the NPST since the 1980s would be primarily attributed to other reasons, although the IWP warming can have a cancelling effect against those reasons. © 2013 Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54920
Appears in Collections: 过去全球变化的重建
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作者单位: Institute for Climate and Global Change Research, School of Atmospheric Sciences, Nanjing University, Nanjing, 210093, China; State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Chu C.,Yang X.-Q.,Ren X.,et al. Response of Northern Hemisphere storm tracks to Indian-western Pacific Ocean warming in atmospheric general circulation models[J]. Climate Dynamics,2013-01-01,40(2017-05-06)