Fig. 4: Change in SLH-driven RE on SLCF with respect to pre-industrial times.
From: Natural short-lived halogens exert an indirect cooling effect on climate
The change in radiative effect (ΔRE) for different periods of time distinguishes the contribution from pure anthropogenic halogen emissions (ANT, black-striped coloured bars) with respect to the anthropogenic amplification of natural SLH emissions (AANE, empty coloured bars). The contribution of ANT is largest during present times and, regardless of the scenario considered, the contribution of AANE increases in the future. Compared with present times, the SLH-driven ΔRE for CH4 is projected to increase (warming) by the end of the century regardless of the emissions scenario considered; whereas, for O3, the strength of the cooling effect (negative ΔRE) depends on the future RCP scenario considered. Future RCP results are based on time-slice simulations representative of the year 2100.
