基于AERONET的多源多尺度卫星气溶胶产品真实性检验

Validation of Multi-resource and Multi-scale Satellite Aerosol Optical Depth Products with AERONET Data

卫星遥感气溶胶产品已经广泛用于大气监测.以北京地区为研究区域,基于该区域2020年全年的三个AERONET站点(Beijing_RADI、Beijing、Beijing_CAMS)地面实测气溶胶数据,对MODIS和Sentinel-2气溶胶产品进行真实性检验.结果表明:相比于MODIS气溶胶产品,空间分辨率更高的Sentinel-2气溶胶产品与AERONET实测数据之间的相关性更强,R^(2)为0.9683,且Sentinel-2气溶胶产品误差绝对值的平均值比MOD04_L2的小.

The satellite aerosol optical depth product has been used for atmospheric monitoring.Taking Beijing as the test area,this paper uses three AERONET sites data including Beijing_RADI,Beijing,Beijing_CAMS in 2020 to validate MODIS and Sentinel-2 aerosol optical depth products.The results show that compared with MODIS aerosol optical depth product,Sentinel-2 aerosol optical depth product with higher spatial resolution has better correlation with AERONET measured data,of which R ^(2) is 0.9683.Meanwhile,the absolute average error of Sentinel-2 aerosol optical depth products is less than that of MODIS.