热带气象学报2017，Vol.33Issue(5)：608-616,9.DOI:10.16032/j.issn.1004-4965.2017.05.004
近55年广东“龙舟水”异常特征及成因分析
ANALYSIS ON CHARACTERISTICS AND ABNORMAL CAUSES OF DRAGON-BOAT PRECIPITATION IN GUANGDONG IN THE PAST 55 YEARS
摘要
Abstract
Using the daily precipitation data of 86 meteorological observational stations during 1961-2015 in Guangdong and the NCEP/NCAR daily reanalysis data(resolution 1 ° × 1 °),the spatial temporal features and cause of Dragon-boat precipitation in Guangdong are studied by using statistical diagnostic methods,such as EOF analyses,correlation analysis and composite analysis.The results show that the main distribution pattern of Dragon-boat precipitation is consistent.In Guangdong,except the Leizhou Peninsula,the change tendency of Dragon-boat precipitation in Guangdong in the last 55 years is not obvious,and there are significant inter-annual and inter-decadal variations of Dragon-boat precipitation.During more Dragon-boat precipitation (May 21 to June 20) in Guangdong,in the upper troposphere,a subtropical westerly jet stream is stronger compared with the mean.In mid troposphere,the polar vortex is stronger,and an East Asian trough is weaker in the northern section and stronger in the southern section.Northwest Pacific subtropical high is weaker and shifts eastwards.Southerly air stream from northern South China Sea to south China is stronger in lower troposphere,but is the opposite in the years of less Dragon-boat precipitation in Guangdong.关键词
气候学/异常成因/合成分析/龙舟水/大气环流/广东Key words
climatology/abnormal causes/composite analysis/atmospheric circulation/Guangdong分类
天文与地球科学引用本文复制引用
伍红雨,李春梅,王迪龙..近55年广东“龙舟水”异常特征及成因分析[J].热带气象学报,2017,33(5):608-616,9.基金项目
国家重大科学研究计划973项目(2014CB953900) （2014CB953900）
广东省气候中心项目(QH201508、QH201605)共同资助 （QH201508、QH201605）
