DOI: 10.1175/JCLI-D-13-00180.1
Scopus记录号: 2-s2.0-84893186167
论文题名: Out-of-Phase relationship between boreal spring and summer decadal rainfall changes in southern China
作者: Zhu Z. ; Li T. ; He J.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 3 起始页码: 1083
结束页码: 1099
语种: 英语
Scopus关键词: East Asian monsoon
; Empirical Orthogonal Function
; Enhanced convection
; First principal components
; Hadley circulation
; Maritime Continent
; Positive rainfall anomalies
; Tropical Indian ocean
; Climate change
; Oceanography
; Rain
; Wind effects
; Tropics
; air-sea interaction
; atmospheric circulation
; decadal variation
; empirical analysis
; Hadley cell
; La Nina
; multivariate analysis
; precipitation assessment
; principal component analysis
; rainfall
; sea surface temperature
; spring (season)
; summer
; trend analysis
; China
; Far East
; Indian Ocean
; Indian Ocean (Tropical)
; Pacific Ocean
; Pacific Ocean (East)
; Pacific Ocean (West)
英文摘要: A multivariate empirical orthogonal function (MV-EOF) analysis for 1979-2010 shows that low-level circulation and rainfall over East Asia experienced a significant decadal shift around the mid-1990s. During boreal spring (March-May), the first principal component (PC) of the MV-EOF exhibits a marked decadal change around the mid-1990s, while during boreal summer (June-August) the second PC shows a pronounced decadal shift around the same time. It is further noted that the decadal rainfall change over southern China experienced an out-of-phase relationship between boreal spring and summer; that is, from the pre-1994 to the post-1994 period, the rainfall tends to decrease in boreal spring but increase in boreal summer. A mechanism is put forward to explain the out-of-phase decadal rainfall change over southern China between boreal spring and summer. In boreal spring, the composite differences of SST between the latter and former decadal periods indicate a La Niña-like pattern with warming in the western Pacific and cooling in the eastern Pacific. This pattern leads the enhanced convection over the Maritime Continent, which may further induce anomalous subsidence and thus negative rainfall anomalies over southern China through the local Hadley circulation. In boreal summer, dominant decadal SST warming appears in the entire tropical Indian Ocean while the negative SST anomalies in eastern Pacific are much weaker. The warm SST anomaly over the Indian Ocean leads to suppressed convection over the Maritime Continent, which, through the local Hadley cell, favors the strengthening the East Asian monsoon trough and leads to a positive rainfall anomaly over southern China. © 2014 American Meteorological Society. 资助项目: NSF, National Science Foundation
; ONR, Office of Naval Research
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50982
Appears in Collections: 气候变化事实与影响
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作者单位: Key Laboratory of Meteorological Disaster of Ministry of Education, School of Atmospheric Science, Nanjing University of Information Science and Technology, Nanjing, China; International Pacific Research Center, Department of Meteorology, University of Hawai'i at Manoa, Honolulu, United States
Recommended Citation:
Zhu Z.,Li T.,He J.. Out-of-Phase relationship between boreal spring and summer decadal rainfall changes in southern China[J]. Journal of Climate,2014-01-01,27(3)