环青海湖地区气候变化及其对湖泊水位的影响

分析青海湖地区1961～2000年气象观测资料得出：年和四季的气温、地表蒸发以及年和夏季、冬季降水变化的气候倾向率均为正值；而春季、秋季降水变化的气候倾向率为负值。气温升高、地表蒸发加大的趋势比较显著，而降水增多的趋势不显著且年代际变化比较大，气温、地表蒸发等气象要素有向暖干化过渡的趋势，这种暖干化趋势是造成青海湖水位下降的主要原因之一。

Climatic Change and Its Influence on Water Level of Qinghai Lake

An analysis was made of observed data around the Qinghai Lake from 1961 to 2000, and the results show that the climatic tendencies of the annual and seasonal air temperature and surface evaporation and summer and winter precipitation change were all positive, while the climatic tendencies of spring and autumn precipitation change were negative. The tendencies of temperature rising and surface evaporation increasing were more significant, while the tendency of precipitation increasing was less obvious and its inter-annual change was slightly greater. The meteorological factors such as air temperature and surface evaporation shows the tendency of transiting toward warm and dry, which is the main cause of the falling water level of the Qinghai Lake.