Interdecadal modulation of the influence of La Nina events on mei-yu rainfall over the Yangtze River valley

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 热带海洋环境国家重点实验室(LTO)

	Interdecadal modulation of the influence of La Nina events on mei-yu rainfall over the Yangtze River valley
	Wang, X ; Wang, DX ; Zhou, W ; Li, CY
刊名	ADVANCES IN ATMOSPHERIC SCIENCES
	2012
卷号	29 期号:1 页码:157-168
关键词	mei-yu decadal modulation La Nina
ISSN号	0256-1530
通讯作者	wenzhou@cityu.edu.hk
中文摘要	The aim of this study was to investigate changes in the relationship between mei-yu rainfall over East China and La Nia events in the late 1970s, a period concurrent with the Pacific climate shift, using meiyu rainfall data and the National Centers for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) reanalysis. This relationship was modulated by the climate shift: Before the 1977/1978 climate shift and after the 1992/1993 climate shift, mei-yu rainfall levels were above normal in most La Nia years, whereas during the period 1979-1991, mei-yu rainfall was usually below normal levels in La Nia years. Both composite analyses and results from an atmospheric general circulation model show remarkable detail in terms of La Nia's impacts on mei-yu rainfall in the late 1970s due to the change in the mean climatic state over the tropical Pacific. After the late 1970s, the tropical Pacific SSTs were warmer, and the mean state of low-level anticyclone circulation over the western North Pacific (WNP) weakened. Superimposed on La Nia-related cyclonic anomaly over the WNP, anticyclonic circulation weakened. Prior to the late 1970s, the mean state of low-level anticyclone circulation over the WNP was stronger and was less affected by La Nia-related anomalous cyclones. Anticyclone circulation may have brought moisture to the Yangtze River valley, leading to above-normal rainfall.
学科主题	Meteorology & Atmospheric Sciences
语种	英语
WOS记录号	WOS:000298387000014
公开日期	2013-08-28
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/10285]
专题	南海海洋研究所_热带海洋环境国家重点实验室(LTO)
推荐引用方式 GB/T 7714	Wang, X,Wang, DX,Zhou, W,et al. Interdecadal modulation of the influence of La Nina events on mei-yu rainfall over the Yangtze River valley[J]. ADVANCES IN ATMOSPHERIC SCIENCES,2012,29(1):157-168.
APA	Wang, X,Wang, DX,Zhou, W,&Li, CY.(2012).Interdecadal modulation of the influence of La Nina events on mei-yu rainfall over the Yangtze River valley.ADVANCES IN ATMOSPHERIC SCIENCES,29(1),157-168.
MLA	Wang, X,et al."Interdecadal modulation of the influence of La Nina events on mei-yu rainfall over the Yangtze River valley".ADVANCES IN ATMOSPHERIC SCIENCES 29.1(2012):157-168.