联合反演大气气溶胶光学特性和地面反照率

Simulataneous Retrieval of Optical Characteristics of Atmospheric Aerosol and Surface Albedo

利用一种直接由天空亮度的相对分布反演气溶胶光学特性的方法。数值试验表明天空亮度相对分布的变化对地面反照率并不敏感，这样通过地基多个方向天空亮度的测量，并与模式计算结果相比较，定出大气气溶胶的光学厚度和相函数。在得到大气气溶胶的相函数和光学厚度的基础上，用ＧＭＳ－ ５ 气象卫星可见光通道的资料求出了北京地区可见光波段的地面反照率。

We propose a method to retrieve aerosol optical characteristics directly from the distribution of sky brightness. Numerical experiments show that the variation of sky brightness distribution is insensible to surface albedo. One can obtain aerosol optical characteristics by observing multiple-direction sky brightness on the ground and compared with the model calculation. From this basis, using visible channel data of GMS5 to calculate the surface albedo for the Beijing area.