CH4 column concentrations calculated from a high-res GEOS-Chem model run for Uganda, January to April 2020

These data comprise methane (CH4) column concentrations calculated from a GEOS-Chem model run, performed in a nested configuration at high spatial resolution (0.25deg x 0.3125deg latitude-longitude) centred on Uganda. The data included in the netCDF4 files cover a 6.0deg x 8.0deg box centred approximately on the Methane Observations and Yearly Assessments (MOYA) project EM27/SUN measurement site in Jinja.

For the a priori methane emissions inside the nested domain the EDGAR v4.3.2 database is used for anthropogenic emissions, the WetCHARTS dataset for emissions from wetlands, and the GFAS database for daily biomass burning emissions. The boundary conditions for the nested domain come from a global GEOS-Chem model run at lower spatial resolution (2.0deg x 2.5deg latitude-longitude). An ensemble Kalman Filter system is used to perform the inversion. Two netCDF4 files are included: one where we just use the a priori emissions to determine the CH4 fluxes in the model domain, and one where TROPOMI CH4 (satellite observation) data is used to constrain the emissions.

EDGAR - Emissions Database for Global Atmospheric Research (linked in the Details/Docs section)
WetCHARTs - Wetland Methane Emissions and Uncertainty (linked in the Details/Docs section)
GFAS - Global Fire Assimilation System (linked in the Details/Docs section)
TROPOMI - TROPOspheric Monitoring Instrument