GMS5卫星遥感气溶胶光学厚度的试验研究

GMS5 REMOTE SENSING OF AEROSOL OPTICAL THICKNESS OVER CHAOHU LAKE

摘要: 通过模拟GMS5卫星可见光通道的表观反射率R对不同大气气溶胶模型、不同下垫面反射率以及不同气溶胶光学厚度的敏感性,对利用GMS5卫星资料反演湖面上空气溶胶的可行性进行了分析,并结合地面多波段太阳光度计观测数据,反演了巢湖上空大气气溶胶光学厚度。结果表明,反演所得0.5336μm气溶胶光学厚度强烈依赖于湖面反射率的选取,通过选取合适的湖面反射率,卫星反演的气溶胶光学厚度和地面光度计遥感的月均值相对误差不超过30%。

Abstract: By simulating the sensitivity of GMS5 apparent reflectance to the reflectance of surface layer and aerosol optical thickness, we research the feasibility of using GMS5 remote sensing of aerosol optical thickness over the Chaohu Lake. Generally speaking, the retrieved aerosol optical thickness strongly depends on the reflectance of surface layer and the relative error of monthly mean aerosol optical thickness at 0.5336 μm is less than 30%.