This paper describes the results of a dedicated European Carbontracker-methane system.
Figure 6. Performance of inversion M3 (see paper for definition) at European in-situ observation sites, whose data were assimilated in the model, and at the location of four aircraft campaigns. The campaign locations are marked with stars. Aircraft observations were used for validation. The colour of the marker for the in-situ observation site is determined by the RMSE of the observations and posterior mole fractions divided by the pre- defined mdm. The radius of each circle provides the correlation between observations and posterior mole fractions, where a larger radius corresponds to a smaller correlation. Background colours identify the mTC regions (see paper for further details)