Regional relationship between the Jiang-Huai Meiyu and the equatorial surface-subsurface temperature anomalies

作     者：QIAN WeiHong ZHU Jiang WANG YongGuang FU JiaoLan 

作者机构：Department of Atmospheric Science Peking University Beijing100871 China National Climate Center Beijing 100081 China 

出 版 物：《Chinese Science Bulletin》 (Chin. Sci. Bull.)

年 卷 期：2009年第54卷第1期

页      面：113-119页

核心收录：

学科分类：07[理学] 070601[理学-气象学] 0706[理学-大气科学] 

基　　金：Supported jointly by National Basic Research Program of China (Grant No.2006CB403602) the Chinese COPES (Grant Nos.GYHY20070605 and 2006BAC03B03) 

主　　题：长江流域 淮河流域 梅雨季节 赤道 温度 

摘      要：The Jiang-Huai Meiyu rainy season can be distinguished into the Jiangnan Meiyu spell and the Huaihe Meiyu spell. The Jiangnan Meiyu spell appears on the last ten days in June and the Huaihe Meiyu spell lasts from early July to middle July. An inter-decadal transition was observed in 1998 respectively from the anomalies of Jiangnan Meiyu rainfall,the sea surface temperature (SST),and the subsurface tem-perature in the equatorial Pacific. Since the beginning of the 21st century,opposite trends and biennial oscillations of the Meiyu rainfall are observed in the Jiangnan and Huaihe basins. Before the strong La Nia of 1999―2000,the positive SST anomalies usually occurred in the eastern equatorial Pacific. Since the beginning of the 21st century,a precursory warming signal of SST anomaly comes from the subsurface temperature which is centrally exposed near the dateline in the central equatorial Pacific. The above-normal Meiyu rainfall in 2003,2005 and 2007 over the Huaihe basin followed the prior winter-spring positive SST anomaly near the dateline. A relationship shows that the more Jiangnan (Huaihe) Meiyu follows the winter-spring warm water in the eastern (central) equatorial Pacific.