张掖地区近35年来的气温变化

利用张掖地区6个气象站1970～2004年月平均气温、月平均最高、最低气温资料，采用气候倾向率、滑动平均、Mann-Kendall、小波分析等方法对张掖地区近35年的气候变化特征进行分析。结果表明：（1）1970～2004年张掖地区的气温呈现出明显的上升趋势，其中民乐站增幅最高，临泽站增幅最低，平均气温倾向率为0．491℃／10a，且冬季气温增长更为显著；（2）近35年张掖地区的变暖与西北地区同步，但明显早于中国及全球，且升温幅度更大；（3）分析认为，张掖地区目前仍处于气温上升、降水量减少的暖干条件，即气候的未转型区。

TEMPERATURE CHANGE IN ZHANGYE REGION FOR THE LAST 35 YEARS

Using data of the annual mean, the maximum, and the minimum temperature from 6 weather stations in Zhangye region from 1970 to 2004, climatic tendency rate, moving mean, Mann-Kendall, wavelet analysis, the spatial and temporal patterns of the climatic change in this region were analyzed. The main findings can be summarized as follows： （1） There is an obvious ascending in temperature in Zhangye region. Among the ascending trend of 6 weather stations Minle is conspicuous and Linze is not significant. The tendency rate of the temperature is 0. 725℃/10a in Minle, 0. 341℃/10a in Linze and 0. 491℃/10a in Zhangye. The temperature increases more strongly in winter. （2） Compared with China and the global mean temperature, the warming of Zhangye region occurred early. But the warming of Zhangye is the same as northwest China. The tendency rate of temperature increases in Zhangye region exceeds those to China and the global mean in the same period. （3） By studying the data of two periods, we found that the climate of Zhangye region still tends to be warm and dry, namely the mean temperature increasing and the mean precipitation decreasing. The climatic pattern of Zhangye region is also unchanged.