海温异常对江淮流域入梅的影响

通过对江淮流域入梅期与海温场的相关分析，以及对海温异常年大气环流的合成分析，研究了海温异常对江淮流域入梅的影响。结果表明，太平洋、印度洋和大西洋的海温异常对江淮流域的入梅期有较大影响，前一年11月至当年6月西太平洋暖池的海温偏高（低）时，江淮流域入梅早（晚）。2~5月中太平洋的海温偏高时，江淮流域入梅偏晚。5~6月，马斯克林高压附近的海温对入梅期有较好的指示意义，高海温对应早入梅，而低海温对应晚入梅。2~4月以及2~5月西太平洋暖池附近的海温对江淮流域的入梅也有较好的指示意义。6月，台湾以东以及南大西洋的海温异常对入梅期有较大影响。

The Affection of Sea-surface Temperature Anomaly to Meiyu Onset Date of Yangtze-huaihe River Valley

By using the correlation analysis between the Meiyu onset date (MOD) of the Yangtze-Huaihe River valley and SST, and composite analysis of general circulation in years of anomalous SST, the affection of SST to MOD is studied. The results show that the SSTA of Pacific, Indian Ocean and Atlantic can affect the MOD. When the SST of warm pool of western Pacific is high(low) from last Nov. to Jan., the MOD is early(late). The MOD is late when the SST of middle Pacific is high from Feb. to May. From May to June, the SST near Mascarene high has good indication to MOD, that is early(late) when the SST is high(low). From Feb. to May, the SST near the warm pool of western Pacific has good indication to MOD. In June, the SST to the east of Taiwan and southern Atlantic has affection to MOD.