东赤道太平洋海面温度与我国降水的关系

Relationships between the Precipitation in China and the SST in the Equatorial East Pacific

本文分析了太平洋海平面温度(SST)异常与我国降水变化的关系。结果表明:华南地区在埃尔尼诺(或反埃尔尼诺)消亡阶段,降水是偏多(或少);江淮地区除7、8月份降水在(反)埃尔尼诺年是显著偏(少)多外,6月份的降水变化与东赤道太平洋SST有反相变化关系;华北地区夏季降水在反埃尔尼诺年是偏多的。

In this paper, the relationships between the precipitation anomalies in China and the sea surface temperature (SST) anomalies in the equatorial east Pacific are analysed by using the monthly mean SST data (5°×5°) and the monthly precipitation data observed in China from January 1951 to Nove- mber 1987. The results show: the rainfall anomalies over the sough China area tend to be positive (or negative) during the weakening periods of El Nino (Anti- El Nino) events; the rainfall anomalies in July and August tend to be positive (negative) in the El Nino (Anti-El Nino) events in the Yangtze River area, while the result for June is opposite; the rainfall anomalies in summer months tend to be positive in Anti-El Nino events for the north China area.