DOI: 10.1175/JCLI-D-14-00701.1
Scopus记录号: 2-s2.0-84944111540
论文题名: Recent winter precipitation increase in the middle-lower Yangtze River Valley since the late 1970s: A response to warming in the tropical Indian Ocean
作者: Li X.-F. ; Li J. ; Li Y.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 9 起始页码: 3857
结束页码: 3879
语种: 英语
Scopus关键词: Atmospheric temperature
; Atmospheric thermodynamics
; Earth atmosphere
; Precipitation (chemical)
; Precipitation (meteorology)
; Rain
; Submarine geophysics
; Surface properties
; Surface waters
; Wetting
; Atmospheric general circulation models
; Dominant contributions
; East Asian winter monsoon
; Increasing sea-surface temperatures
; Monsoons
; Sea surface temperature (SST)
; Trends
; Tropical Indian ocean
; Oceanography
; atmospheric general circulation model
; global warming
; monsoon
; precipitation (climatology)
; sea surface temperature
; trend analysis
; winter
; China
; Indian Ocean
; Indian Ocean (Tropical)
; Yangtze River
英文摘要: The middle-lower valley of the Yangtze River (MLY), located in the middle of eastern China, has been one of the largest economic centers of China since ancient times. Winter precipitation variability over the MLY is important for China because of its significant influence on the local economy. However, few studies have focused on the long-term variability of winter precipitation over the MLY. This study reports a significant wetting trend over the MLY in winter during the three decades since the late 1970s, forming a "mid-east-China winter wetting" pattern, which has become an important feature of precipitation change under the weakening East Asian winter monsoon. This wetting trend in the MLY also implies the poleward extension of the precipitation belts of southern China. Further investigation reveals that the increasing sea surface temperature (SST) in the tropical Indian Ocean (TIO) is the dominant factor responsible for recent increases in precipitation over the MLY. The thermal forcing driven by warming of the TIO SST gives rise to an anomalous cyclonic circulation along the coast of eastern China. This transports more water vapor onto the Chinese mainland, shifts and causes anomalous convergence over the MLY, and generates the increase in precipitation there. As such, the increasing SST in the TIO induces over 80% of the observed wetting trend over the MLY. This mechanism was verified by results obtained from two sets of sensitivity experiments using a numerical spectral atmospheric general circulation model. Thus, increasing SST in the TIO has made a dominant contribution to the recent winter precipitation increase over the MLY. © 2015 American Meteorological Society. 资助项目: NSFC, National Natural Science Foundation of China
; NSFC, National Natural Science Foundation of China
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50658
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; College of Global Change and Earth System Science, Beijing Normal University, Beijing, China; Data Analytics, CSIRO Digital Productivity Flagship, Floreat, WA, Australia
Recommended Citation:
Li X.-F.,Li J.,Li Y.. Recent winter precipitation increase in the middle-lower Yangtze River Valley since the late 1970s: A response to warming in the tropical Indian Ocean[J]. Journal of Climate,2015-01-01,28(9)