The document describes a global carbon budget inferred from OCO-2 satellite data using an ensemble Kalman filter coupled with the GEOS-Chem model from 2015-2020. It finds: 1) Estimated global CO2 emissions and sinks are consistent with NOAA measurements of growth rates in atmospheric CO2 concentrations. 2) Natural carbon sinks were largest over South America, southern Africa, and boreal Eurasia due to fires. 3) Inversions are consistent on global scales but differ in partitioning fluxes between land and ocean and among latitudes due to sparse observational constraints. 4) Sensitivity experiments show regions lacking OCO-2 coverage, like the tropics, are sensitive to prior flux assumptions.