Fig. 3: Modelled global OH relative to global OH in year 2000. | Communications Earth & Environment

Fig. 3: Modelled global OH relative to global OH in year 2000.

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

Fig. 3

In (a) results from 1850 are shown while in (b) the results are shown from 1970. Results from the OsloCTM3 time-slice simulations (with fixed year 2010 meteorology) are shown as dark blue diamonds combined with dashed lines and the time development for OH from the simulations with variable meteorology are shown as a dark blue solid line. These simulations use the CEDS-2017 emissions (CEDS17). In (b) the additional simulation with the CEDS-2021 emissions and COVID emission for 2020 (with fixed year 2010 meteorology) is shown as dark red crosses combined with dashed line (CEDS21 + COVID). The range of the model results from AerChemMIP33 up to 2014 are shown as green shading and model results from CCMI31 up to 2010 are shown as blue shadings. Note that the multi-model results are tropospheric means, while the OsloCTM3 results are for the whole atmosphere. The stabilization period from 2000 to 2007 is indicated by grey shadings. Similar figures for methane lifetime are shown in Supplementary Fig. 5.

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