气象2016，Vol.42Issue(11)：1335-1341,7.DOI:10.7519/j.issn.1000-0526.2016.11.005
21世纪以来西南地区干季降水与西太平洋副热带高压年代际变化的关系
Relationship Between the Dry-Season Precipitation in Southwest China and Decadal Changes of the Western Pacific Subtropical High Since the 21st Century
摘要
Abstract
The variation characteristics of precipitation in the dry season (from November to the following April)in the Southwest of China are investigated by using the observation data from 1961 to 2011.The re-sults indicated that the precipitation during the dry season changed remarkably around 2000.The spatial distribution characteristics of the precipitation before 2000 was distinctively different from the characteris-tics after 2000.The rain was much less than normal and drought got worsened in the 21st century.Precip-itation in Yunnan and its surrounding areas reduced significantly.The negative correlation between the rain of the dry season in Southwest and the western Pacific subtropical high (WPSH)strengthened rapidly in late 1990s.Meanwhile the feature of WPSH has shown markedly decadal enhancement since the 21st century.Its area has been growing,with intensity enhancing and position being farther western than normal.Enhancement of the relation between the rainfall during the dry season and WPSH and the decadal enhancement of WPSH,both contribute remarkably to the decline of the dry-season rainfall,and probably result in the frequent drought in the Southwest of China.关键词
西南地区/干季降水/西太平洋副热带高压/年代际Key words
Southwest of China/precipitation of the dry season/the western Pacific subtropical high/decadal分类
天文与地球科学引用本文复制引用
蒋薇,张祖强,刘芸芸..21世纪以来西南地区干季降水与西太平洋副热带高压年代际变化的关系[J].气象,2016,42(11):1335-1341,7.基金项目
国家重点基础研究发展计划（973计划）（2013CB430200）、江苏省气象科研开放基金项目（KZ201505）和公益性行业（气象）科研专项（GYHY201206017）共同资助 （）
