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	Teleconnection between the indian summer monsoon onset and the meiyu over the yangtze river valley
	Liu YunYun1,2,3; Ding YiHui2
刊名	Science in china series d-earth sciences
	2008-07-01
卷号	51期号:7页码:1021-1035
关键词	Indian summer monsoon (ism) The meiyu over the yangtze river valley Teleconnection mode
ISSN号	1006-9313
DOI	10.1007/s11430-008-0073-9
通讯作者	Liu yunyun(liuyuny@cma.gov.cn)
英文摘要	Based on the indian and chinese precipitation data and the ncep-ncar reanalysis circulation data, the relationship between the indian summer monsoon (ism) onset and the meiyu over the yangtze river valley has been discussed by the methods of correlation analysis and composite analysis. the results show that the date of ism onset over kerala in the southwestern coast of the indian peninsula is about two weeks earlier than the beginning of the meiyu over the yangtze river valley. after the outbreak of ism, the teleconnection mode sets up from the western coast of india via the bay of bengal (bob) to the yangtze river valley and southern japan. it is different both in time and space from the teleconnection mode which is from the northwest of india via the tibetan plateau to northern china. the former mode is defined as the "south" teleconnection of the asian summer monsoon, forming in the period of ism onset; while the latter mode is called the "north" teleconnection, mainly occurring in the asian monsoon culminant period. during the process of the "south" teleconnection's formation, the asian monsoon circulation has experienced a series of important changes: ism onset, the northward movement of the south asia high (sah), the onset vortex occurrence, the eastward extension of the stronger tropical westerly belt, and the northeastward jump of the western pacific subtropical high (wpsh), etc. consequently, since ism sets up over kerala, the whole asian continent is covered by the upper sah after about two weeks, while in the mid-and lower troposphere, a strong wind belt forms from the arabian sea via the southern india, bob and the south china sea (scs), then along the western flank of wpsh, to the yangtze river valley and southern japan. with the northward moving of the subtropical jet streams, the upper westerly jet stream and the low level jet have been coupled vertically over east asia, while the yangtze river valley happens to locate in the ascending motion area between the upper jet stream and the low level jet, i.e. right of the entrance of the upper jet stream and left of the low level jet. such a structure of the vertical circulation can trigger the meiyu onset over the yangtze river valley.
WOS关键词	EAST-ASIA ; SOUTH
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000257332400012
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2386618
专题	中国科学院大学
通讯作者	Liu YunYun
作者单位	1.Chinese Acad Meteorol Sci, Beijing 100081, Peoples R China 2.Natl Climate Ctr, Beijing 100081, Peoples R China 3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Liu YunYun,Ding YiHui. Teleconnection between the indian summer monsoon onset and the meiyu over the yangtze river valley[J]. Science in china series d-earth sciences,2008,51(7):1021-1035.
APA	Liu YunYun,&Ding YiHui.(2008).Teleconnection between the indian summer monsoon onset and the meiyu over the yangtze river valley.Science in china series d-earth sciences,51(7),1021-1035.
MLA	Liu YunYun,et al."Teleconnection between the indian summer monsoon onset and the meiyu over the yangtze river valley".Science in china series d-earth sciences 51.7(2008):1021-1035.

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