Relationship Between Upper-Ocean Heat Content in the Tropical Indian Ocean and Summer Precipitation in China
HUANG Ke1; ZHANG Qi-Long2; XIE Qiang1,4; WANG Dong-Xiao1
2012
发表期刊Atmospheric and Oceanic Science Letters
期号04
摘要An analysis of the Ishii ocean heat content(OHC) in the tropical Indian Ocean from the surface to 700-m depth shows that the OHC changes dramatically on the interannual timescale in the Indian Ocean.The first mode of empirical orthogonal function(EOF1) of the OHC shows that there is a strong air-sea interaction pattern in the Indian Ocean with a positive(negative) loading in the east and a negative(positive) loading in the west.This seesaw oscillation pattern influences the summer precipitation in China with a North-South reversed distribution.Composite analysis shows that during a positive(negative) OHC episode,an anomalous cyclonic(anticyclonic) circulation over the western Pacific and South China weakens(enhances) the monsoonal northward flow in the lower troposphere;meanwhile,anomalous meridional circulation connects the descending(ascending) branch over the Southeast Indian Ocean and the ascending(descending) branch in South China as well as a descending(ascending) branch over North China.Analysis of the mechanism behind these features suggests that(1) the accumulation of OHC-induced vorticity is related to the wave activity over the mid-latitudes and that(2) the meridional teleconnection induced by the Indo-Pacific air-OHC interaction appears over East Asia and the western Pacific.Both of these patterns can cause summer precipitation anomalies in China.
关键词Oceanic Heat Content Summer Precipitation Interannual Variability Tropical Indian Ocean
文献类型期刊论文
版本出版稿
条目标识符http://ir.idsse.ac.cn/handle/183446/794
专题深海科学研究部_海洋环流观测与数值模拟研究室
作者单位1.State Key Laboratory of Tropic Oceanography(LTO),South China Sea Institute of Oceanology(SCSIO),Chinese Academy of Sciences,Guangzhou 510301,China
2.Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China
3.Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
4.Sanya Institute of Deep-Sea Science and Engineering, Chinese Academy of Sciences, Sanya 572099, China
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HUANG Ke,ZHANG Qi-Long,XIE Qiang,et al. Relationship Between Upper-Ocean Heat Content in the Tropical Indian Ocean and Summer Precipitation in China[J]. Atmospheric and Oceanic Science Letters,2012(04).
APA HUANG Ke,ZHANG Qi-Long,XIE Qiang,&WANG Dong-Xiao.(2012).Relationship Between Upper-Ocean Heat Content in the Tropical Indian Ocean and Summer Precipitation in China.Atmospheric and Oceanic Science Letters(04).
MLA HUANG Ke,et al."Relationship Between Upper-Ocean Heat Content in the Tropical Indian Ocean and Summer Precipitation in China".Atmospheric and Oceanic Science Letters .04(2012).
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