华南区域季节性降水的差异分析  

Differences Analysis of Seasonal Precipitation in South China Region

作　　者：吴林[1,2] 覃峥嵘[3] 黄大贞[2] 沈晗[2] 李江南[2] 

机构地区：[1]贺州市气象局,广西贺州351100 [2]中山大学环境科学与工程学院,广东广州510275 [3]广西气象局,广西南宁530022

出　　处：《气象研究与应用》2009年第3期5-7,11,共4页Journal of Meteorological Research and Application

基　　金：国家自然科学基金委员会重点研究项目(40730951);贺州市科学研究与技术开发计划项目(贺科转070409Z)

摘　　要：运用EOF方法研究华南区域降水时空分布特征,结果表明:(1)华南地区各季节降水在年际和年代际的时间变化上有区域一致性,但有季节性差异,其中春季和秋季在20世纪80年代后降水明显减少,旱年增多;而夏季90年代后降水明显增加,涝年增多;冬季变化则不明显。(2)华南地区各季节降水在空间分布上也有差异,其中春季降水呈现东多西少的分布特征,大值中心位于广西东北部、广东中部及西南沿海。夏季和秋季降水相似,呈南多北少的分布特征,大值中心位于广西沿海和广东西南沿海。冬季降水呈东北多西南少的分布特征,大值中心位于粤北。Using EOF method, the spatial and temporal distribution characteristics of regional precipitation in South China were analyzed. The results showe that： ①The interannual and interdeeadal changes of the seasonal precipitation are regional consistent but of seasonal difference, including the precipitation in spring and autumn significantly reduced after 1980s, with drought-year increased; while summer precipitation increased significantly after 1990s, with flood-years increased. Those were not significant in winter. ②There are also differences in the spatial distribution of each season precipitation in Southern China. More spring rainfall distribute in the east, and the rainfall center locates at the northeast of Guangxi, center of Guangdong and south-west coast. In summer and autumn more rainfall concentrated in the south than in the north, with the rainfall center located along the coastal of Guangdong and Guangxi. More winter rainfall distribute in the northeast with the large value located at the northern of Guangdong.

关 键 词：华南地区 降水特征 EOF分析 

分 类 号：P458.121[天文地球—大气科学及气象学]