 We developed an ensemble data assimilation system to optimize initial conditions for carbon monoxide and aerosols, while quantifying emission fluxes with distinct attribution of anthropogenic and wildfire sources using Moppet CO profile V9 retrievals and MODIS AOD collection 6.1 from the moderate resolution imaging spectroradiometer, MODIS, instruments. The assimilation system is built on the data assimilation research test bed, DART, and includes a meteorological ensemble to assimilate weather observations within the online community atmosphere model with chemistry, CAM-CAM. Inversions indicate an underestimation of CO emissions in CAMs, GLOB ANT underscore V5.1 in China for 2015, and an overestimation of CO emissions in FIN version 2.2, especially in the tropics. These emissions increments are consistent between the MODIS AOD and the Moppet CO-based inversions. Biasis and hydroxyl radical, OH, chemistry, dominate the CO errors. This article was authored by Benjamin Gaubert, David P. Edwards, Jeffrey L. Anderson, and others. We are article.tv, links in the description below.