Fig. 4: Modelled wetland methane emissions and soil sink. | Communications Earth & Environment

Fig. 4: Modelled wetland methane emissions and soil sink.

From: Trends in atmospheric methane concentrations since 1990 were driven and modified by anthropogenic emissions

Fig. 4

In (a) global and regional wetland emissions and in (b) the global soil sink calculated using the CLM model are shown. Coloured boxes show the annual mean values from the CLM simulations for the period 2008–2017 (or the end year of the simulation see Method) compared to the range of reported studies in The Global Methane Budget (GMB) for the 2008–2017 decade from top-down inversions models and bottom-up models13 represented by the error bars. The CLM results are presented for three groups, simulations driven by different meteorological data (left column), simulations driven by CRUJRA meteorological data where values for two central parameters for methane fluxes (q10ch4: q10 for methane production and f_ch4: methane production to total C mineralization rate) are varied (middle column) and methane fluxes calculated using the monthly wetland distributions and the methane fluxes for wetland areas from the CLM (right column). Note that some of the coloured boxes overlap.

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