Figure 3.

Time series of in situ observations of (a) CF₄ and (b) C₂F₆ at Gosan (black). Also shown are statistically determined background (green) and modeled concentrations based on convolution with transport and prior (blue) or posterior (red) emissions in the FLEXINVERT+ inverse modeling scheme. The prior used for these modeled concentrations is the flattened distribution at base magnitudes, see Section 4.3 for details. Shown below is the total measurement uncertainty (UNC_meas, in black) assigned for these observations, as well as the components that define it, namely the instrumental uncertainty (UNC_inst, in gray), the background uncertainty (UNC_bkg, in green), and the model representation uncertainty (UNC_mod, in purple), plotted over time for (c) CF₄ and (d) C₂F₆. See discussions in Sections 4.1 and 4.2 for details regarding the specific definitions of these uncertainties.