Cause of severe droughts in Southwest China during 1951-2010

doi:10.1007/s00382-013-2026-z

CORC > 自然资源部第一海洋研究所 > 自然资源部第一海洋研究所 > 业务部门 > 海洋与气候研究中心

	Cause of severe droughts in Southwest China during 1951-2010
	Feng, Lin 1; Li, Tim 2,3; Yu, Weidong 1
刊名	CLIMATE DYNAMICS
	2014-10
卷号	43 期号:7-8 页码:2033-2042
关键词	Rainfall Drought Southwest China The tropical Pacific North Atlantic Oscillation
ISSN号	0930-7575
DOI	10.1007/s00382-013-2026-z
英文摘要	The cause of severe droughts over the Southwest China (SWC) during the local dry season is investigated based on the station rainfall data and the National Centers for Environmental Prediction/National Center for Atmospheric Research reanalysis data during 1951-2010. The droughts are in general consistent with local anomalous descent in the middle troposphere. The diagnosis of the vertical motion (omega) equation indicates that the local descent is primarily maintained by the anomalous cold temperature advection processes. Both the advection of anomalous temperature by mean wind and the advection of mean temperature by anomalous wind contribute to maintaining the anomalous descent over the SWC region. A composite analysis shows that the circulation anomaly over SWC is induced by remote forcing from the tropical Pacific and North Atlantic Oceans. During La Nia years, enhanced heating over the Maritime Continent induces anomalous downward motion over SWC through the connection of local Hadley circulation. Adiabatic warming associated with the downward motion helps to set up and maintain the local anomalous anticyclone. Another possible route is through the North Atlantic-Asia teleconnection, in which downstream Rossby wave energy propagation plays a crucial role. A negative-phase North Atlantic Oscillation may trigger a large-scale wave train pattern that induces an anomalous anticyclone over the subtropical Asia and promotes the dry condition over SWC.
资助项目	ONR[N000141210450]
WOS研究方向	Meteorology & Atmospheric Sciences
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000342493600019
内容类型	期刊论文
源URL	[http://ir.fio.com.cn/handle/2SI8HI0U/3774]
专题	业务部门_海洋与气候研究中心
作者单位	1.State Ocean Adm, Inst Oceanog 1, Ctr Ocean & Climate Res, Qingdao 266061, Peoples R China; 2.Univ Hawaii, Int Pacific Res Ctr, Honolulu, HI 96822 USA; 3.Univ Hawaii, Dept Meteorol, Honolulu, HI 96822 USA
推荐引用方式 GB/T 7714	Feng, Lin,Li, Tim,Yu, Weidong. Cause of severe droughts in Southwest China during 1951-2010[J]. CLIMATE DYNAMICS,2014,43(7-8):2033-2042.
APA	Feng, Lin,Li, Tim,&Yu, Weidong.(2014).Cause of severe droughts in Southwest China during 1951-2010.CLIMATE DYNAMICS,43(7-8),2033-2042.
MLA	Feng, Lin,et al."Cause of severe droughts in Southwest China during 1951-2010".CLIMATE DYNAMICS 43.7-8(2014):2033-2042.