北太平洋海温异常对中国东北地区旱涝的影响

THE EFFECT OF NORTH PACIFIC SEA SURFACE TEMPERATURE ANOMALY ON THE SUMMER PRECIPITATION IN NORTHEAST CHINA

摘要: 文中利用1961～2000年中国东北地区80个测站40a的月降水和同一时期的北太平洋海温资料以及奇异值分解(SVD)技术,分析了北太平洋海温异常对中国东北地区夏季旱涝的影响。结果表明:东北地区夏季降水与北太平洋海温异常之间存在着较为密切的联系,当前期冬季和春季甚至是前一年夏季赤道中东太平洋海温如果处于异常偏暖(或偏冷)状态,并且西风漂流区具有较明显的SST负(或正)距平分布时,则东北大部分地区夏季降水具有整体偏多(或偏少)的倾向。当然,东北地区降水与北太平洋海温异常之间的这种联系也并非是简单的一一对应的关系。

Abstract: Based on the North Pacific sea surface temperature (SST) monthly mean data and the summer precipitation from 80 observational stations of Northeast China for the period 1961 to 2000, the relationship between the north Pacific SST anomaly in preceding seasons and the summer precipitation in Northeast China has been studied by using the Singular Value Decomposition (SVD) technique.