轮台县1961-2008年降水变化特征

利用轮台县气象局1961-2008年的年、季降水资料，采用气候倾向率和降水相对变率统计方法，研究了近48a轮台县年、季降水量、降水相对变率及降水日数的年际、年代际变化趋势特征。结果表明：年降水量平均以10．7mm／10a的速率增加；各季降水量平均以0．6-6．5mm／10a的速率增加；年降水相对变率以-6％／10a的速率减小；年降水日数以2．6d／10a的速率增加，各季降水日数以（0．1～1．2）d／10a的速率增加。

The Changing Characteristics of Precipitation in Luntai Area during 1961-2008

By use of the annual and seasonal precipitation data observed by Luntai meteorological station during 1961-2008, this paper analyze the inter-decade and interannual change tendency characteristic of the annual and seasonal precipitation, the precipitation related rate and the rainfall days in the latest 48 years with the statistical methods of the climate tendency rate and the precipitation related rate. The results show that the annual and seasonal precipitation had been increasing averagely with the rate of 10.7mm/10a and 0.6-6.5 mm /10a respectively, the annual precipitation related rate reduced by the speed of-6%/10a, the annual and seasonal rainfall days had been increasing by the speed of 2.6d/10a and 0.1-1.2d/10a respectively.