艾比湖流域典型绿洲热环境时空变化特征分析

Analysis on spatial-temporal change characteristics of thermal environment in typical oasis of Ebinur Lake watershed

针对目前绿洲地表温度时空变化的研究较少的现状,该文采用覃志豪单窗算法,利用1990年、1998年和2011年三期Landsat数据对精河县的地表温度进行反演,并查询实时陆面地表温度进行对比检验;分析了不同时期精河县地表温度分布格局,将反演的地表温度划分为低温区、次低温区、中温区、次高温区、高温区和极高温区。研究得出:各温度区间的分布范围发生了巨大变化;反演结果符合水体温度最低、绿洲次之、裸地最高的"冷岛"现象。结果表明利用Landsat数据反演地表温度是可行的。

Aiming at the current status that the study on the spatial-temporal changes ol oasis surtace temperature is insufficient, the paper used mono-window algorithm from QIN Zhi-hao to retrieve the land surface temperature of Jinghe County with the Landsat TM data of the years of 1990, 1998 and 2011, and inquired the actual land surface temperature to comparatively test the result. Moreover, it analyzed the distribution pattern of Jinghe County land surface temperature within different periods, and divided the surface as low temperature zone, secondary low temperature zone, medium temperature zone, secondary high temperature zone, high temperature zone, and extremely high temperature zone. The research demonstrated that. the land surface temperature has a great change in the study area; and the retrieved land surface temperature conformed to the Cold Island phenomenon as the water is lowest, the oasis is secondly, and the bare land is highest. Results showed the feasibility of the retrieval method with the I.andsat data.