气象2016，Vol.42Issue(5)：548-556,9.DOI:10.7519/j.issn.1000-0526.2016.05.004
夏季热带西太平洋海温对厄尔尼诺发展阶段我国东部汛期降水的影响分析
Possible Impact of the Western Tropical Pacific SSTA on Precipitation During the El Niñno Developing Summers in the Eastern Part of China
摘要
Abstract
The possible impacts of the tropical western Pacific SSTA on China’s precipitation during the El Niñno developing phases are emphasized in this paper.Analyses of all the 17 summers during the El Niñno developing phases show that precipitation in these summers varies from year to year and does not exhibit a significant relationship with the El Niñno indices (Niñno3 and Niñno3 .4 index).However,further analyses reveal that the precipitation is closely related to the tropical western Pacific SSTA during these summers. When the tropical western Pacific is warmer,it is wetter in the south of the Yangtze River and drier in the north,and vice versa.The possible mechanism is also proposed.The different conditions of the western Pacific SST anomalies indicate different distribution features of the SSTA in the tropic Oceans.The differ-ent tropical SST patterns can induce different responses to the tropical and the subtropical atmospheric cir-culation near East Asia.Therefore,the precipitation in the east of China is affected.Besides,the anoma-lous warm SST in the western Pacific may contribute to the precipitation anomaly in the summer of 2014. The tropical western Pacific in the summer of 2014 is warmer than all the previous 17 summers during the El Niñno developing phases.Such a condition of the tropical western Pacific favors more precipitation in the south of the Yangtze River and less in the north.And the observation of precipitation is also characterized by such a feature.Thus,the tropical western Pacific SSTA may exert an impact on the summer precipitati-on in 2014.关键词
汛期降水/热带西太平洋/海温异常/厄尔尼诺Key words
summer precipitation/tropical western Pacific/SSTA/El Niñno分类
天文与地球科学引用本文复制引用
顾薇..夏季热带西太平洋海温对厄尔尼诺发展阶段我国东部汛期降水的影响分析[J].气象,2016,42(5):548-556,9.基金项目
国家重点基础研究发展计划（973计划）（2013CB430203）、国家科技支撑计划（2015BAC03B04）和公益性行业（气象）科研专项（GYHY201306031）共同资助 （）
