A global surface CO2 flux dataset (2015–2021) inferred from OCO-2 retrievals using the GONGGA inversion system

Here we present a global spatially-resolved terrestrial and ocean carbon flux dataset for 2015–2021. The dataset is generated by the Global ObservatioN-based system for monitoring Greenhouse GAses (GONGGA) atmospheric inversion system through assimilating Observing Carbon Observatory 2 (OCO-2) v10r XCO₂ retrievals. The flux files contain NEE, ocean carbon fluxes, fossil fuel emissions, and biomass burning emissions. The NEE and ocean carbon fluxes include the prior and posterior estimates. The corresponding gridded uncertainty of NEE and ocean fluxes are also included in the flux files. The global gridded fluxes are 3-hourly with a resolution of 2° latitude × 2.5° longitude . Users can aggregate the gridded fluxes on their preferred regions. The GEOS-Chem simulated CO₂ concentrations driven by posterior NEE and ocean fluxes, as well as fossil fuel emissions and biomass burning emissions, are generated every 3 hours with a resolution of 2° latitude × 2.5° longitude at 47 vertical levels.