中文摘要：

巴丹吉林沙漠腹地的湖泊形成机理一直存在较大争论。其中,湖泊蒸发估算的不确定性可能是导致这一争论的重要原因。采用沙漠腹地的气象观测数据,分析了沙漠腹地湖泊蒸发估算所具有的特殊性,亦即沙漠腹地与外围的风速差异、腹地湖泊＂冷岛效应＂和＂盐度效应＂。具体而言,腹地风速较外围风速小,可引起传统的彭曼模型估算的蒸发偏大,腹地湖泊的冷岛效应则使平流项在湖泊能量平衡过程中不可忽视,腹地湖泊的盐度效应使得其蒸发速率要小于淡水蒸发。因此,开展系统的定位观测是准确获取湖巴丹吉林沙漠腹地泊蒸发的一个合理途径,并有助于揭示沙漠腹地湖泊的形成机理。

英文摘要：

There are substantial controversies about the formation mechanism of the lakes in the hinterland of the Badain Jaran Desert,China. In which the uncertainty of estimating lake evaporation may be one of the important reasons of such controversies. Based on the in-situ observation data,the particularity of evaporation over the lakes in the hinterland of the Badain Jaran Desert was analyzed,namely the wind speed difference between the hinterland and the peripheral areas and the ＂cold-island effect＂and ＂salinity effect＂of the lakes in the hinterland. Specifically,the wind speed in the hinterland was lower than that in the peripheral areas,which may cause the overestimation of the lake evaporation through the traditional Penman model. The ＂cold-island effect＂of the lakes further led to the difference between the ordinary water surface evaporation,and the ＂salinity effect＂made the lake evaporation rate be lower than fresh water evaporation. Therefore,it may be a rational way to acquire the accurate data of lake evaporation and reveal the formation mechanism of the lakes in the study area by carrying out the in-situ observations.