上海地区大气稳定度和气象区块的研究

根据１９８６年６月～１９８７年５月从上海市区４个站、郊县２个站的气象资料,研究了上海地区的大气稳定度和气象区块。采用３种方法确定稳定度的级别,并进行了比较。应用对风向、风速的聚类分析方法划定气象区块。对两站之间风的相关系数用了３种不同的公式进行计算。利用这些相关系数的结果,同时采用“最短距离法”和“最长距离法”,得到相关树枝图,并由此得出了上海地区的气象区块图。

Study on Atmospheric Stabilities and Meteorological Blocks in Shanghai Area

Based on the meteorological data obtained from four stations in urban and two stations in suburban counties in Shanghai, during June 1986 to May 1987, the atmospheric stabilities and meteorological blocks were studied. Three methods for determining stability grades were used and compared with each other as well. The cluster analysis of wing speeds and directions was applied to ascertain the meteorological blocks. Three different formulas were used to calculate the correlation coefficient of wind between two stations. Adopting both the "nearest neighbour" and "farther neighbour" methods, and combined with the correlation coefficient results, eight graphs of correlation twigs were made and then the meteorological blocks of Shanghai area were obtained.