巴州地区近40年降水量变化特征分析

Characteristic of Precipitation Variability in Recently 40 Years in Bazhou

应用巴州地区11个站的降水资料进行统计分析,结果显示:1.40a来全地区年降水量及夏季、冬季降水量都明显增多,春秋季节变化不大。2.年降水量主要表现为全州一致的多雨或少雨空间分布型,其次为南部、北部地区的降水变化的相反趋势,春季降水的空间分布与年相似。3.全年和夏、秋季降水量都存在7.3a的主要变化周期。

The statistic analysis based on precipitation data of eleven stations in BaZhou shows the annual mean precipitation is obviously rising in recent forty years as well as in summer and winter, but changing little in spring and autumn. In space distribution, the annual precipitation is consistently in the whole of BaZhou. There was a primary period of 7.3 annual in annual, summer and autumn precipitation.