中文摘要：

潜在蒸散发是衡量气候变化下区域水热资源演变的重要参数。利用艾比湖流域10个气象站1961-2012年逐日气温、降水、日照时数、风速、相对湿度等资料,计算了该流域近52 a潜在蒸散量（ET0）,并分析了其时空变化特征。结果表明：（1）艾比湖流域年、春季、夏季和秋季的ET0都呈增加趋势,冬季ET0呈减少趋势。年ET0增势为0.93 mm/a,在1987年发生增加突变并存在15 a左右的变化周期。（2）艾比湖流域春季、夏季、秋季和年ET0空间分布总体都表现为北部大于南部,而冬季ET0在空间上自西向东逐渐减少。变化趋势上,艾比湖流域年、春季、夏季和秋季的ET0表现为中部增势强于南部和北部;冬季中部减势强于流域南部和北部。（3）年代变化上,20世纪60-80年代ET0空间上都呈减少趋势,20世纪80年代-21世纪初呈增加趋势。其中80年代ET0最小,2001-2012年ET0最大。（4）气候因子与ET0的变化密切相关,但在突变前后存在差异;其中气温对ET0的影响最大。该研究可为气候变化下干旱半干旱区水热演变的研究以及流域尺度的生态环境保护和管理提供借鉴。

英文摘要：

Evapotranspiration is an important factor for evaluating regional heat and water resources under the change of climate. Spatiotempo- ral variation of evapotranspiration in Ebinur Lake Basin were calculated based on daily temperature, precipitation, sunshine duration, wind speed and relative humid from 10 meteorological stations from 1961 to 2012. The results show that annual, spring, summer and autumn ETo has increased significantly and winter ETo decreased in the recently 52 years. The annual ETo have a strong increasing trend with the rate of 9.27 mm/10 a and a periodic of 15 years, and abrupt in 1987. In view of the spatial distribution pattern, the value of annual, spring, sum- mer and autumn ETo increased from southern region to northern region. Whereas, the value of winter ETo increased from westem region to eastern region. The annual, spring, summer and autumn ETo strongest in the central region of Ebinur Lake Basin and increased slightly in northern and southern region of the study area, which presented the similar spatial decreasing trend of winter ETo. ETo decreased continuously from 1960s to 1980s, and increased from 1980s to 2000s. The minimum decadal value of ETo happened in 1980s and the maximum decadal value of ETo happened in 2000s. The meteorological factors have strong correlation with the variation of ETo. Among which, temperature have robust influence on ETo. This paper can provide references for the study of changes in water resources as well as for environmental protection and management in arid and semiarid region in China.