SatPM2.5

Fine particulate matter (PM2.5) concentrations are estimated using information from satellite-, simulation- and monitor-based sources. Aerosol optical depth from multiple satellites (MODIS, VIIRS, MISR, SeaWiFS, and VIIRS) and their respective retrievals (Dark Target, Deep Blue, MAIAC) is combined with simulation (GEOS-Chem) based upon their relative uncertainties as determined using ground-based sun photometer (AERONET) observations to produce geophysical estimates that explain most of the variance in ground-based PM2.5 measurements. A subsequent statistical fusion incorporates additional inf...

细颗粒物（PM2.5）浓度的估算综合了卫星、模拟及监测三类数据源的信息。来自多颗卫星（MODIS、VIIRS、MISR、SeaWiFS及VIIRS）的气溶胶光学深度（Aerosol Optical Depth，AOD）及其各自的反演算法（Dark Target、Deep Blue、MAIAC），与模拟数据（GEOS-Chem）相结合；结合过程中，各数据源的权重基于其相对不确定性确定，而该不确定性则通过地基太阳光度计（AERONET）观测结果评估得出。最终生成的地球物理估算值可解释地面PM2.5观测数据中的大部分变异。后续的统计融合过程会纳入更多信息...