福建省近50a降水趋势及区域变化特征

Characteristics of tendency and regional variation in 50-year precipitation in Fujian Province

本文应用趋势分析方法分析了福建省35个代表站1961～2003年年、季降水的 变化规律．结果表明全年、春季、夏季全省降水以正的趋势为主,而雨季降水以负趋势 为主,秋冬季趋势不明显．其后应用旋转主因子分析方法对年、季降水进行区域性分 析,结果表明全省降水变化主要以南北向变化为主,东西向为次,同时给出了各季具 体的分区范围．最后选取4个代表站进行降水的年代际变化分析．

In this paper tendency analysis method is used to analyze the trend of annual and seasonal rainfall at 35 stations of Fujian from 1961 to 2003. The result shows that the precipitation in whole province generally increase in early spring and summer of the year, and tends to decrease in rainy season, the tendency is not prominence in fall and winter. Using Rotated EOF to analyze regional character of annual and seasonal rainfall, its shows that the main variation of rainfall in the province is in direction from south to north , and the next for east and west. We also detail regional range of each season, and chose 4 stations to analyze the decadal variability of rainfall.