DOI: 10.1007/s00382-013-1938-y
Scopus记录号: 2-s2.0-84906941779
论文题名: Impact of Indian summer monsoon on the South Asian High and its influence on summer rainfall over China
作者: Wei W. ; Zhang R. ; Wen M. ; Rong X. ; Li T.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2014
卷: 43, 期: 2017-05-06 起始页码: 1257
结束页码: 1269
语种: 英语
英文关键词: East Asian summer monsoon
; Indian summer monsoon
; South Asian High
; Summer rainfall over China
英文摘要: By using the monthly ERA-40 reanalysis data and observed rainfall data, we investigated the effect of the Indian summer monsoon (ISM) on the South Asian High (SAH) at 200 hPa, and the role played by the SAH in summer rainfall variation over China. It is found that in the interannual timescale the east-west shift is a prominent feature of the SAH, with its center either over the Iranian Plateau or over the Tibetan Plateau. When the ISM is stronger (weaker) than normal, the SAH shifts westward (eastward) to the Iranian Plateau (Tibetan Plateau). The east-west position of SAH has close relation to the summer rainfall over China. A westward (eastward) location of SAH corresponds to less (more) rainfall in the Yangtze-Huai River Valley and more (less) rainfall in North China and South China. A possible physical process that the ISM affects the summer rainfall over China via the SAH is proposed. A stronger (weaker) ISM associated with more (less) rainfall over India corresponds to more (less) condensation heat release and anomalous heating (cooling) in the upper troposphere over the northern Indian peninsula. The anomalous heating (cooling) stimulates positive (negative) height anomalies to its northwest and negative (positive) height anomalies to its northeast in the upper troposphere, causing a westward (eastward) shift of the SAH with its center over the Iranian Plateau (Tibetan Plateau). As a result, an anomalous cyclone (anticyclone) is formed over the eastern Tibetan Plateau and eastern China in the upper troposphere. The anomalous vertical motions in association with the circulation anomalies are responsible for the rainfall anomalies over China. Our present study reveals that the SAH may play an important role in the effect of ISM on the East Asian summer monsoon. © 2013 Springer-Verlag Berlin Heidelberg. 资助项目: MOST, Ministry of Science and Technology of the People's Republic of China
; NSFC, Ministry of Science and Technology of the People's Republic of China
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54353
Appears in Collections: 过去全球变化的重建
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作者单位: State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, No. 46 Zhong-Guan-Cun South Ave., Haidian District, Beijing, 100081, China; University of Chinese Academy of Sciences, Beijing, China; International Pacific Research Center, University of Hawaii at Manoa, Honolulu, HI, 96822, United States
Recommended Citation:
Wei W.,Zhang R.,Wen M.,et al. Impact of Indian summer monsoon on the South Asian High and its influence on summer rainfall over China[J]. Climate Dynamics,2014-01-01,43(2017-05-06)