VIIRS高分辨率地表反射率关系库支持下的气溶胶光学厚度反演  

VIIRS Aerosol Optical Depth Retrieval Based on High Resolution Surface Reflectance Ratio Database

作　　者：王联霞 张衡[1] 徐青[1] WANG Lianxia;ZHANG Heng;XU Qing(Information Engineering University, Zhengzhou 450001, China)

机构地区：[1]信息工程大学,河南郑州450001

出　　处：《测绘科学技术学报》2021年第3期295-300,共6页Journal of Geomatics Science and Technology

基　　金：国家重点研发计划项目(2017YFC1200300)。

摘　　要：通过遥感技术反演气溶胶光学厚度AOD对于全面、动态监测大气污染时空变化具有重要意义。可见光红外成像辐射仪VIIRS作为MODIS的后继传感器,可在全球范围内实现对气溶胶的连续时空监测。针对复杂的地表类型,通过构建基于像素的动态地表反射率关系库,能实现陆地AOD高分辨率反演。利用全球气溶胶自动观测网站AERONET地基站点观测结果对反演结果对比验证,发现二者具有显著的相关性,相关系数达到0.849,RMSE为0.184,优于官方产品的0.197;通过与2018-04-20真彩图比对,反演结果较官方产品更符合实际气溶胶分布趋势。该算法在陆地AOD反演上具有良好的性能,为进一步研究利用Suomi-NPP VIIRS数据反演大气颗粒物质量浓度提供了重要数据源。Inversion of Aerosol Optical Depth(AOD)by remote sensing technology is of great significance for comprehensive and dynamic monitoring of spatiotemporal variation of air pollution.As the MODIS successor,Visible Infrared Imaging Radiometer Suite can achieve a continuous monitoring of aerosols on global scale.For complex land types,constructing dynamic surface reflectance ratio database pixel-by-pixel can achieve a higher resolution AOD inversion.The VIIRS AOD retrievals in this algorithm have a correlation of 0.849.The value of RMSE is 0.184 which is better than the official product’s value that is 0.197 when compared against the ground-based observations at the global AERONET sites.By comparing with the true color map on April 20,2018,the inversion results are more consistent with the actual aerosol distribution trend than the official products.In conclusion,this algorithm has a good performance in land AOD inversion,and provides an important data source for further research on the inversion of atmospheric particulate matter mass concentration using Suomi-NPP VIIRS data.

关 键 词：气溶胶光学厚度 遥感 可见光红外成像辐射仪 反演算法 地表反射率关系库 

分 类 号：P237[天文地球—摄影测量与遥感]