中文摘要：

应用RossThick-LiTransit核驱动BRDF（bidirectional reflectance distribution function）模型,选择2004年Terra MODIS（moderate resolution imaging spectraradiometer）500 m分辨率数据,对青藏高原地区的地表反照率进行了反演研究,并以平均气溶胶光学厚度值0.11计算了正午时（北京时间12：00）实际的地表反照率,反演结果与当地的地表覆盖类型和地形具有较好的一致性。此外,藏北高原4个辐射观测站点观测资料与反演结果的比较表明,500 m分辨率反演结果不仅可以满足气候和陆面过程模式的精度要求,而且精度高于美国1 km分辨率反照率反演结果。

英文摘要：

Based on Terra MODIS（moderate resolution imaging spectraradiometer） data in 500 m resolution in 2004,this paper retrieves the albedo over the Qinghai-Tibet Plateau by using the linear RossThick-LiTransit kernel-driven BRDF（bidirectional reflectance distribution function） model.Given mean aerosol optical depth as 0.11,the actual albedo at 1200 BST is calculated.The retrieved albedo distribution is well consistent with local land cover types and terrain characteristic from DEM（the digital elevation model）.In addition,comparisons of retrievals and ground-based albedo observations from four radiation stations located in the northern Tibetan Plateau reveal that the accuracy of retrievals in 500 m resolution not only can meet requirement of albedo in climate model and land surface process model,but also is better than that of retrievals from the U.S.BRDF/albedo products in 1 km resolution.