2005年初夏云南严重干旱的诊断分析  

DIAGNOSTIC ANALYSIS OF THE SEVERE DROUGHT OVER YUNNAN AREA IN THE EARLY SUMMER OF 2005

作　　者：刘瑜[1] 赵尔旭[2] 黄玮[1] 孙丹[3] 琚建华[4] 

机构地区：[1]云南省气候中心,云南昆明650034 [2]云南省气象科技服务中心,云南昆明650034 [3]云南大学大气科学系,云南昆明650091 [4]中国气象局培训中心,北京100081

出　　处：《热带气象学报》2007年第1期35-40,共6页Journal of Tropical Meteorology

基　　金：国家自然科学基金项目(40365001)

摘　　要：2005年春末夏初云南出现了55年来最严重的高温干旱天气。通过诊断分析发现,造成此异常气候主要原因是中高层大气环流季节转换滞后,冷空气活动偏北;南海夏季风爆发偏晚;热带对流偏弱;西太平洋副高偏南、偏强、偏西。High temperature and drought occurred in Yunnan province during the late spring and early summer of 2005, which is the most severe event in this region since the 1950＇s. Based on the observational data and relevant diagnoses, this extreme weather event was studied and discussed. The results show that the occurrence of this event could be due to the following observational facts that happened in 2005. （1） The seasonal adjustment of middle- and high-level atmospheric circulation was delayed. （2） The cold air activity center was deviated north. （3） The onset of summer monsoon over the South China Sea was delayed. （4） The tropical convection was much weaker than usual. （5） The subtropical high over the western Pacific was located southwestwards and relatively strong.

关 键 词：云南 高温干旱 南海季风 副热带高压 热带对流 

分 类 号：P426.616[天文地球—大气科学及气象学]