阿拉木图与乌鲁木齐夏季降水变化趋势分析

基于哈萨克斯坦阿拉木图站和新疆乌鲁木齐站的1967-2009年夏季降水资料，采用一元线性回归法、Mann-Kendall突变检验和Morlet小波分析的方法，分析了两地夏季降水的变化趋势特征，结果表明：阿拉木图和乌鲁木齐夏季降水均呈增加趋势，20世纪70和80年代降水偏少，90年代至今降水偏多。阿拉木图夏季降水于1982年出现了突变点，乌鲁木齐夏季降水于1990年左右出现了突变点。2000年以前阿拉木图以6-8a左右的短周期变化为主，以后以15-16a左右的长周期变化为主。乌鲁木齐在1987年以前以4-6a的短周期变化为主，在1987年以后以16a的长周期变化为主。

The comparative analysis of summertime precipitation in Almaty and Urumqi

Based on the observation precipitation data during 1967-2009 in Almaty Station of Kazakhstan and Urumqi Station of Xinjiang, the climatic variation characteristics of summertime precipitation were analyzed with methods such as simple linear regression method, Mann-Kendall abrupt test and Morlet wavelet analysis. The results showed that: the summertime precipitation of Almaty and Urumqi increased, the precipitation of 1970s and 1980s was less, while in the 1990s was more up to now. The summertime precipitation of Almaty had abrupt point in the 1982, and Urumqi had abrupt point around 1990. Before 2000, Almaty had the main short period variation of 6-8a, and then the long period variation of 15-16a was obvious. Urumqi had the main short periodic change of 4-6a, later in 1987 the long period variation of 16a was dominant period.