Fig. 2: Atmospheric composition changes over time in the zero anthropogenic methane scenario (ZAME) from 2015 to 2050.
From: The role of future anthropogenic methane emissions in air quality and climate
The SSP3-7.0 scenario is shown in red, ZAME in blue, SSP1-2.6 in orange and pre-industrial values in dotted grey. The fainter coloured lines show the three individual ensemble members and the darker line shows the ensemble mean, for SSP3-7.0 and ZAME. a Global mean (airmass-weighted) tropospheric OH concentration. b Methane lifetime, defined as total atmosphere burden divided by CH4-OH flux in the troposphere. c Decadal mean (2040–2050) change in surface ozone concentrations in ZAME compared to SSP3-7.0. d Population-weighted surface ozone concentration. Population datasets are based on the underlying SSP scenarios46. The tropopause is defined as a [O3] = 125 ppb surface.
