科尔沁沙地地表反照率遥感研究

Study on the Remote Sensing of Surface Albedo in the Horqin Sandy

地表反照率是影响遥感影像信息的重要因素之一,受地球表面覆盖类型等地表特征的影响,因而可利用地表覆盖类型信息结合遥感影像计算地表反照率。以科尔沁沙地为研究试验区,对试验区Landsat-TM进行地形和大气纠正,利用Liang所建立的Landsat-TM数据反演公式计算实验区的反照率分布图;将地表反照率分布图与与研究区监督分类获得的土地利用分布图进行相关分析。结果表明,研究区土地利用类型与地表反照率有明显相关关系;将研究区地表反照率与研究区归一化植被指数进行统计分析,获得研究区地表反照率与归一化植被指数的相关方程。

The Surface albedo impacting remote sensing image information is one of the important factors,and the surface albedo is effected by the Earth＇s surface Coverage or other surface characteristics,and therefore can make use of land Coverage types with information of remote sensing images calculated surface albedo. Horqin sandy as a experimental area,the experimental area for Landsat-TM topography and atmospheric were corrected,then use the Landsat-TM data inversion formula established by Liang to calculate the experimental zone albedo map; the surface albedo map and the land-use maps required from supervised and classified study area were correlation analyzed. The results showed that the study area land-use and the types of surface albedo significant correlation; the surface albedo and NDVI in the study area were statistical analyzed,the study area＇s surface albedo and NDVI dependent equation were obtained.