中国东部夏季降水特征及其与西太副高的关系  

The Characteristics of Summer Precipitation in Eastern China and its Relationship with the WPSH

作　　者：肖艳林 池再香 杨冬冬[2] 陈蕴 孔德璇 XIAO Yanlin;CHI Zaixiang;YANG Dongdong;CHEN Yun;KONG Dexuan(Liupanshui Meteorological Bulau of Guizhou Province,Liupanshui 553000,China;Nanjing University of Information ＆ Technology,Nanjing 210044,China;Shuicheng Meteorological Bm~au of Guizhou Province,Shuicheng 553001,China)

机构地区：[1]贵州省六盘水市气象局,贵州六盘水553000 [2]南京信息工程大学,江苏南京210044 [3]贵州省水城县气象局,贵州水城553001

出　　处：《中低纬山地气象》2018年第3期44-50,共7页Mid-low Latitude Mountain Meteorology

基　　金：中国气象局预报员专项(CMAYBY2016-066):滇黔准静止锋背景下的贵州晴雨预报方法研究

摘　　要：利用中国东部160个气象观测站1951—2012年夏季(6—8月)的月平均降水资料,采用EOF分析方法,分析中国东部夏季降水的时空分布特征及其与西太平洋副热带高压的关系。结果表明:中国东部夏季降水大值区具有从华南—江淮流域—华北—东北的分布特征。EOF第1模态空间分布为长江以北与黄河以南之间存在一个降水大值雨带,而EOF第2模态显示出以长江为界,长江以南降水量偏少,长江以北降水量偏多,且呈反位相。在西太平洋副热带高压强度较强的年份,江淮流域降水量偏少,华北地区降水量偏多;西太平洋副热带高压强度较弱的年份,江淮流域降水量偏多,华南地区降水量偏少。Using the 160 weather stations ‘ Summer（ June-August） monthly precipitation data during 1951 to 2012,and EOF analysis was adopted to analyze summer rainfall in eastern China temporal and spatial distribution of precipitation and the subtropical high through the synthesis analysis diagram analysis of the rain belt summer monsoon rainfall distribution type and its relationship with the West Pacific subtropical high. The results show that the large area of summer precipitation in eastern China has the characteristics of distribution from the south China-Jianghuai watershed-north China-northeast China. EOF first modal space distribution for the north of the Yangtze river and south of the Yellow River,a large precipitation value between the rain belt,the second modal and EOF show is bounded to the Yangtze river,south of the Yangtze river,precipitation,precipitation,the more the north of the Yangtze river and the opposite phase. In the year of the high intensity of subtropical high pressure in western Pacific,the precipitation in Jianghuai river basin was less than that,and the precipitation in north China was much higher. The western Pacific subtropical high pressure strength is weak,the precipitation in the Jianghuai river basin is much higher,and the precipitation in south China is less.

关 键 词：夏季雨带变化 EOF方法 西太平洋副热带高压 中国东部 

分 类 号：P426.6[天文地球—大气科学及气象学]