黑龙江省夏季降水的主相关型及其环流特征

将黑龙江省53个气象站的夏季降水做点相关，将达到统计显著性标准最多的台站降水分布图定义为主相关型，讨论了与该降水类型对应的500hPa环流特征。结果表明黑龙江省西南部和鹤岗一带的夏季降水具有很好的代表性，夏季降水有明显的西北-东南向分布，可利用南北降水之差来描述全省夏季降水的最主要雨型，500hPa高度场乌拉尔山槽脊变化和我国副热带地区高度距平均不同对黑龙江省夏季降水关系密切，鄂霍茨克海地区的高度距平对省夏季降水的南北分布更有指示意义。

Main Correlation Pattern of Summer Rainfull over Heilongjiang and Its Circulation Features

Based on he single -point correlatio n for summer rainfall from 53meteoro logical stations in Hei-longjiang,the precipitation distr ibution map for the maximum number of stations reaching the statistical s ig-nificance standard is defined as the main correlation pattern,and its co rresponding 500hPa circulation features are discussed in this paper.Results show that summer rainfall over the so utheast Heilongjiang and Hegang are a is a good reprensentative of the rain fall over Heilongjiang,and its distribution is a northwest -southeast belt.The dominant rainfall pattern is described by the rainfall differe nce between south and north.The vicis-situde of the Ural trough and ridge in500hPa goepotential height and the v ariation of subtropical height anomaly are correlated closely with the summer rainfall in Heilongjiang,and Okhotsk sea anomaly is an im-portant indicator to the southern an d northern distribution of the summe r rainfall in Heilongjiang.