a decreasing trendP < 0.001
By contrast, the global OH abundance in the SSP370 scenario exhibits a decreasing trend of 0.037‒0.15% yr −1 ( P < 0.001) over 2015‒2100 among these models, together with an increase in tropospheric O 3 of 0.11‒0.17% yr −1 ( P < 0.001) (Supplementary Figs. 3 and 4 ).