DOI: 10.1007/s00382-016-3077-8
Scopus记录号: 2-s2.0-84961205912
论文题名: Meridional displacement of the East Asian trough and its response to the ENSO forcing
作者: Leung M.Y.-T. ; Cheung H.H.N. ; Zhou W.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2017
卷: 48, 期: 2017-01-02 起始页码: 335
结束页码: 352
语种: 英语
英文关键词: Atmospheric circulation
; East Asian winter monsoon
; El Niño–Southern Oscillation
; Thermodynamic equation
英文摘要: This paper examined the underlying dynamic mechanisms associated with the meridional displacement of the East Asian trough (EAT), which is closely related to the temperature variability in the southern part of East Asian winter monsoon (EAWM). During the southward displacement of the EAT, the Siberian high is stronger and the Aleutian low is displaced southward. This is due mainly to the anomalous cyclonic flow associated with seasonal eddies over the midlatitude central Pacific, which enhances the horizontal advection of cold (warm) air to the southern (northern) part of the EAT in the lower troposphere. The cold (warm) advection narrows (thickens) the height thickness and results in negative (positive) temperature anomalies in the southern (northern) part of the EAT. These anomalous circulation features can be reasonably explained by the phase of the El Niño–Southern Oscillation (ENSO). The results are also verified by the numerical experiments with prescribing ENSO-like heat source anomalies over the tropical eastern and western Pacific in an anomaly atmospheric general circulation model. All of these results advance our understanding for the linkage between the ENSO and the EAWM via its modulation of the EAT. © 2016, Springer-Verlag Berlin Heidelberg. 资助项目: RGC, UGC, Research Grants Council, University Grants Committee
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53384
Appears in Collections: 过去全球变化的重建
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作者单位: Guy Carpenter Asia-Pacific Climate Impact Centre, School of Energy and Environment, City University of Hong Kong, Kowloon, Hong Kong
Recommended Citation:
Leung M.Y.-T.,Cheung H.H.N.,Zhou W.. Meridional displacement of the East Asian trough and its response to the ENSO forcing[J]. Climate Dynamics,2017-01-01,48(2017-01-02)