近40年三工河流域气候变化分析

通过近40年三工河流域不同海拔高度的典型地貌气象资料的统计，对影响流域气候变化的气温、降水、蒸发气象要素进行线性趋势分析，得出中山森林区气候暖湿化相对较弱，平原区气候暖湿化特征显著，近山倾斜平原绿洲区是气候暖湿化最为明显的地域。流域降水与蒸发呈反相关关系，降水增加起到绝对增湿作用，蒸发减小起到相对增湿作用。在此气候趋势变化下，三工河流域和有相似地理环境的天山北坡各流域已显现出降水量增大、洪水发生频率增高、荒漠植被显著增加以及区域农业生产环境改善的暖湿化特征。

Analyses on the Climate Change in Sangong River Valley in the Past 40 Years

Based on nearly 40 years observation data at weather stations at different height in Sangong River valley, analyzed the linear change of temperature, precipitation and evaporation. The results were shown that the change of warm-wet characteristic was not notable in forest region at mid-mountain-belt, obvious in plain area, and the most obvious in the oasis near Tianshan Mountains. The evaporation and precipitation were anticorrelation in the whole valley, the decrease of evaporation as well as rainfall increase helped to increase humidity. So there were the warm-wet characteristics which were increase of rainfall in summers, the high frequency of flood, enlargement of desert vegetation area and improvement of regional agricultural production environment.