MODIS资料用于塔克拉玛干沙漠地表温度计算方法初探

A Method of Retrieving Taklimakan Desert Surface Temperature by Using MODIS TIR Channels Data

用热红外通道的遥感数据计算陆地表面温度是MODIS资料的重要应用之一。陆地表面温度(LST)是表征地球表面能量平衡和气候变化的很好指标,也是研究区域或全球陆地物理过程的关键参数。特别是对于面积广大、人烟罕至的沙漠地区,用遥感资料反演其地表温度更显得非常必要。作者主要介绍MODIS资料用于塔克拉玛干沙漠地表温度的计算方法。

One of the very important applications of MODIS TIR data is to retrieve Land Surface Temperature (LST). As a key parameter in the physical processes of land\|surface on a regional as well as global scale the LST is a good indicator of the energy balance at the Earth s surface and climate change. It is very useful to retrieve LST from satellite data especially for broad and rarely populated desert areas. Up to now, MODIS instrument onboard the EOS AM and PM platforms is the only one that can retrieve regional and global LST. Some researches showed that the accuracy specification for MODIS LST is 1  at 1 km resolution under clear\|sky conditions. Validated by accurate ground\|based measurements, the absolute accuracy specification for MODIS LST after calibration may possibly reach 0\^5  for calm lake water and playa surfaces in dry atmospheric conditions. This paper introduced and analyzed the method of retrieving LST by using MODIS TIR channels data.