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	Quasi-biweekly oscillation over the tibetan plateau and its link with the asian summer monsoon*
	Wang, Meirong1,2; Duan, Anmin1
刊名	Journal of climate
	2015-06-01
卷号	28期号:12页码:4921-4940
ISSN号	0894-8755
DOI	10.1175/jcli-d-14-00658.1
通讯作者	Duan, anmin(amduan@lasg.iap.ac.cn)
英文摘要	Intraseasonal variation (isv) is especially prominent and unique in the asian summer monsoon region. in this work, the dominant isv mode over the tibetan plateau (tp) in the summer monsoon season (june-august), together with its structure and evolution, is identified using station observations, global precipitation climatology project precipitation data, and era-interim during 1979-2011. results indicate that quasi-biweekly oscillation (qbwo) is the dominant mode of isv over the tp and is significant in terms of the circulation, precipitation, and diabatic heating fields. in particular, the qbwo is closely related to the onset and active/break phases of the tp summer monsoon. in most cases, the qbwo originates from the equatorial western pacific and first propagates northwestward to the bay of bengal and northern india, then northward to the southeastern tp, and finally eastward to the east asian area, showing a clockwise propagation pathway. two main mechanisms are responsible for the northward propagation of the qbwo signals. the first, in operation when the qbwo signals are located to the south of 20 degrees n, is the generation of barotropic vorticity induced by the easterly vertical shear, leading to the northward movement of the convection. the second mechanism, responsible for the propagation taking place farther north toward the tp, is a moisture advection effect that destabilizes the lower atmosphere ahead of the convection. further analyses suggest that the qbwo plays a role in linking the isv of the different subsystems of the asian summer monsoon as a macroscale monsoon system.
WOS关键词	SOUTH CHINA SEA ; WESTERN NORTH PACIFIC ; 500-MB HEIGHT FLUCTUATIONS ; LARGE-SCALE CIRCULATION ; ATMOSPHERIC HEAT-SOURCE ; YANGTZE-RIVER VALLEY ; SHORT-TIME SCALES ; BOREAL SUMMER ; INTRASEASONAL OSCILLATION ; EAST-ASIA
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
语种	英语
出版者	AMER METEOROLOGICAL SOC
WOS记录号	WOS:000356283900018
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2376753
专题	中国科学院大学
通讯作者	Duan, Anmin
作者单位	1.Chinese Acad Sci, State Key Lab Numer Modeling Atmospher Sci & Geop, Inst Atmospher Phys, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Wang, Meirong,Duan, Anmin. Quasi-biweekly oscillation over the tibetan plateau and its link with the asian summer monsoon*[J]. Journal of climate,2015,28(12):4921-4940.
APA	Wang, Meirong,&Duan, Anmin.(2015).Quasi-biweekly oscillation over the tibetan plateau and its link with the asian summer monsoon*.Journal of climate,28(12),4921-4940.
MLA	Wang, Meirong,et al."Quasi-biweekly oscillation over the tibetan plateau and its link with the asian summer monsoon*".Journal of climate 28.12(2015):4921-4940.

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