Fig. 1: Methane emissions inputs and the resulting surface methane concentrations in UKCA-CH4.
From: The role of future anthropogenic methane emissions in air quality and climate
a Methane emissions used as inputs into UKCA-CH4 for 1985–2050, from Gidden et al.23. The emissions are split into sectors: interactive wetland emissions (orange), non-wetland natural (green), biomass burning (dark orange), anthropogenic (pink) and removed anthropogenic in the zero anthropogenic methane emissions scenario (ZAME, grey). b Methane surface concentrations from 1985 to 2050 relative to the year 2000 (left-hand y axis). The right-hand y axis shows the corresponding modelled absolute methane concentration. Historical model concentrations are in dark grey and observations (Dlugokencky, NOAA/GML (gml.noaa.gov/ccgg/trends_ch4/) are shown by crosses. Three future scenarios are shown: ZAME (blue), SSP3-7.0 (red) and SSP1-2.6 (orange). The pre-industrial (PI) level is shown by the dotted line. The fainter coloured lines show the three individual ensemble members and the darker line shows the ensemble mean, for SSP3-7.0 and ZAME.
