华南前汛期降水与我国近海海温的SVD分析  

SVD ANALYSIS BETWEEN THE ANNUALLY FIRST RAINING PERIOD PRECIPITATION IN THE SOUTH OF CHINA AND THE SST OVER OFFSHORE WATERS IN CHINA

作　　者：马慧 陈桢华 姜丽萍 王谦谦[2] 林泽金 

机构地区：[1]中山市气象局,广东中山528401 [2]南京信息工程大学／气象灾害和环境变化重点实验室,江苏南京210044

出　　处：《热带气象学报》2009年第2期241-245,共5页Journal of Tropical Meteorology

基　　金：国家自然科学基金资助项目(40233037和40175021);广东省气象科研课题(2007D04);广东省科技厅项目(0711212100002)共同资助

摘　　要：利用国家气象局整编的中国160站月降水资料和英国气象局的全球逐月海温格点资料，分析了华南前汛期降水的异常特征，并用SVD方法分析华南前汛期降水与近海海温的关系。结果表明：近50年华南南部前汛期降水的总的趋势变化不明显。华南南部前汛期降水异常存在3a、5a、7a和14a的周期；用SVD方法分析发现：存在一个关键区（130～158°E，5～18°N），华南前汛期降水异常关键影响时段是前一年5—8月．华南前汛期降水与该关键区海温有较好的负相关关系，即前一年5-8月关键区海温异常偏高（低），次年华南前汛期降水偏少（多）。Based on the monthly mean precipitation data at 160 stations in China during1951-2000 and the monthly sea surface temperature during 1950-1998 study the relationship between the precipitation anomalies in the pre-flood period in the South of China and SSTA over offshore waters in China. The precipitation anomaly existed 3-year, 5-year, 7-year, 14-year periodic variation in the pre-flood period in the South of China. And the relationship between the precipitation anomalies in the pre-flood period in the South of China and SSTA over offshore waters in China are investigated by means of SVD analysis. The Key region and the key period of time which influences the precipitation anomaly in the pre-flood period in the South of China has been found .And the SSTA of the Key region from May to August in the last year has the best negative correlation with the precipitation in the pre-flood period in the South of China.

关 键 词：华南前汛期 降水异常 海温异常 SVD分析 

分 类 号：P461.2[天文地球—大气科学及气象学]