我国5—8月降水量与南方涛动指数的隔年遥联

THE CORRELATION BETWEEN THE PRECIPITATION IN MAY—AUGUST AND SOI IN THE PREVIOUS YEAR

对我国160个测站5—8月标准化降水距平与南方涛动指数的统计分析表明,我国大范围降水距平分布与上年南方涛动指数有显著的相关,其相关紧密程度不亚于降水与当年南方涛动指数的相关。在ENSO现象次年,以长江、淮河下游为中心的我国东部沿海地区,5—8月降水呈明显负距平,我国大部分其他地区,5—8月降水呈明显正距平。

The statistical analysis of precipitation anomalies at 160 Chinese stations in May—August shows that the large—scale distribution of precipitation anomalies in China is significantly correlated with the SOI in the previous year and the correlation is as close as the correlation between the precipitation and SOI in the same year. In the following year of ENSO,significant negative preciptation anomalies are observed in China's east coastal areas and positive anomalies in most of the other parts of the country.