大洋间SST遥联与亚太夏季风异常的关系

用奇异值分解(Singular Value Decomposition,SVD)方法,给出了四季年代际和年际时间尺度上北大西洋和北太平洋海表温度(Sea Surface Temperature,SST)的显著遥相关.用SVD主模态时间系数构造了海温异常指数Ⅰ,分析了它们与同期亚太夏季风和我国东部夏季降水异常的关系.结果表明:两大洋间的SST遥联在年际、年代际时间尺度上都与亚太夏季风相关,其中,年际尺度的两大洋SST遥联与长江流域的降水存在显著相关.

Teleconnection of Sea Surface Temperatures and Its Relation with Asian-Pacific Summer Monsoon Anomaly

The four seasons' significant teleconnection on both interannual and interdecadal scales of sea surface temperature anomaly between North Atlantic and North Pacific are demonstrated using the diagnostic method of SVD(Singular Value Decomposition).The anomaly index I of sea surface temperature anomaly is constructed of the time coefficient of the principal SVD pattern.The correlation of index I with anomalies of contemporaneous Asian-Pacific summer monsoon and the summer precipitation of eastern China are analyzed.The results show that the teleconnection pattern between North Pacific and North Atlantic SST is correlated with the anomaly of summer Asian-Pacific monsoon on both interdecadal and interannual scales,and remarkably with the precipitation of the Yangtze River valley on interannual scale.