基于6S模型从MODIS图像反演陆地上空大气气溶胶光学厚度  

Aerosol Optical Thickness Retrieval Over Land From MODIS Data Based on the Inversion of the 6S Model

作　　者：王新强[1] 杨世植[1] 朱永豪[1] 易维宁[1] 

机构地区：[1]中国科学院安徽光学精密机械研究所,合肥230031

出　　处：《量子电子学报》2003年第5期629-634,共6页Chinese Journal of Quantum Electronics

摘　　要：本文描述了一种以MODIS图像反演陆地大气气溶胶光学厚度的算法,它是基于6S大气辐射传输模型计算的查找表(LUT),并利用地面的暗目标自动反演陆地大气气溶胶光学厚度的方法。利用该算法给出了我国江西省中部地区的2001年10月19日550 nm波长的平均大气气溶胶光学厚度(0.19),这与从国家气象档案馆获得的该地区的气象能见度计算结果有较好的一致性。In this paper an algorithm used to derive the aerosol optical thickness over land is developed. The algorithm is based on a Look-Up Table of the up surface reflectance computed from the 6S model and requires that some pixels in the image will correspond to the dense dark vegetation as the surface cover. The aerosol optical depth is computed by interpolation from the Look-Up Table automatically. The algorithm was applied to the middle area of Jiangxi. The average aerosol optical thickness derived from the imagery shows a good agreement with measurement from the observatorv.

关 键 词：MODIS图像 大气气溶胶 光学厚度 反演方法 地面反射率 

分 类 号：P407.4[天文地球—大气科学及气象学]