“…Many different datasets have been used in aerosol data assimilation including EPA surface monitor PM2.5 data (Schwartz, Liu, Lin, & McKeen, 2012) and surface aerosol optical measurements (Chang, Zhang, Li, Chen, & Li, 2021), visibility networks (Clark et al, 2008), AERONET Sun photometer data (Rubin et al, 2017), and ground-based lidars (Liang et al, 2020) (Yumimoto et al, 2008). Many kinds of satellite data have also been assimilated into aerosol models: visible/near-infrared satellite data from MODIS (Edward J.…”