Regional CO2 fluxes from 2010 to 2015 inferred from GOSAT XCO2 retrievals using a new version of the Global Carbon Assimilation System

This Dataset include annual and monthly CO2 fluxes from 2010 to 2015 in a resolution of global 1 deg by 1 deg, which were inferred from GOSAT XCO2 retrievals using the Global Carbon Assimilation System. The fluxes have been independently evaluated using CO2 observations from 52 surface flask sites, with global mean bias about -0.5±1.8 ppm. Globally, the mean annual BIO and OCN carbon sinks and their interannual variations are very close to the estimates of CT2017, and the mean atmospheric CO2 growth rate and its interannual changes are also very close to the observations. Regionally, over the northern lands, there are the strongest carbon sinks in North America Temperate, followed by Europe, Boreal Asia, and Temperate Asia; and in tropics, there are strong sinks in Tropical South America and Tropical Asia, but a very weak sink in Africa. This pattern is significantly different from the estimates of CT2017, but the estimated carbon sinks in each continent and some key regions like Boreal Asia and Amazon are comparable or in the range of previous bottom-up estimates. The interannual variations of carbon fluxes in most TransCom land regions have a good relationship with the changes in severe drought area or LAI, or are basically consistent with previous estimates for the impact of drought.