利用ASTER数据反演珠峰地区地表特征参数

Land Surface Characteristic Variables Estimated from ASTER Images over Qomolangma Area

利用2006-2011年9景ASTER遥感影像计算了青藏高原珠穆朗玛峰地区的地表特征参数(地表反照率、地表温度、归一化植被指数、植被覆盖度),并对地表反照率和地表温度反演结果进行了验证。结果表明:地表反照率和地表温度的反演结果与观测值较为一致,能够作为陆面过程模式的输入数据;反演得到的植被指数能够较好的代表珠峰地区的地表植被特征;所有的反演算法和结果仅依赖于遥感数据,表明在资料缺乏地区利用卫星遥感技术是获取地表特征参数的有效手段。

Basing on 9 scenes of ASTER data from 2006 to 2011,the land surface characteristic variables( albedo,land surface temperature,NDVI and vegetation fraction) over Qomolangma area of the Tibetan Plateau are retrieved. Albedo and land surface temperature observations are used to validate the retrieved data. It is shown that the estimated land surface results are good comparable to the ground measurements. The deriving land surface vegetation variables are in good accordance with the land surface status. All of the methodologies and results are depended on remote sensing data. Therefore,remote sensing from satellites is an effective way to derive land surface characteristic variables over the areas where are lack of in situ data.