SEBS模型在塔克拉玛干沙漠地区地表能量通量估算中的应用

Estimation of surface energy flux using surface energy system (SEBS) in the Taklimakan Desert regions

利用SEBS(Surface Energy Balance System)模型,对塔克拉玛干沙漠及周边地区的地表能量通量进行模拟估算。通过修正适合于塔克拉玛干沙漠地表的参数化方案,结合该地区的MODIS遥感数据,将同期同化气象资料输入模型中,模拟出该地区的地表净辐射、地表土壤热通量、感热通量和潜热通量的空间分布。与塔克拉玛干沙漠大气环境观测试验站的实测数据对比,得出:1)SEBS模型在塔克拉玛干沙漠地区具有适用性;2)模型反演的沙漠腹地净辐射约为350W/m^2,感热通量在200W/m^2左右,潜热通量在±20W/m^2之间,其结果均与塔中站实测资料吻合较好。因此利用参数修正后的SEBS模型估计塔克拉玛干沙漠地区能量平衡各分量具有一定精度,可满足区域地表能量通量的计算要求。

Using the SEBS(Surface Energy System)model,the surface energies in the Taklimakan Desert and surrounding areas were simulated and estimated.By modifying the parametric scheme to suitable for the Taklimakan Desert surface,combined with the MODIS data of the same area,the assimilation weather data were taken into the model to simulate the spatial distribution of net radiation,surface heat flux,sensible heat and latent heat flux in the area.Compared with the observational data from the Taklimakan Desert Atmospheric Environment Observation and Experiment Station(Tazhong station),the results are found:The SEBS model has applicability in the Taklimakan Desert.The results of the model estimation show that the net radiation in the desert hinterland is about 350 W/m^2,the sensible heat flux is 200 W/m^2,and the latent heat flux is±20 W/m^2.The results estimated by the SEBS model agree well with the measured data at the Tazhong station.