Brief communication: Reduction in the future Greenland ice sheet surface melt with the help of solar geoengineering

Abstract. The Greenland Ice Sheet (GrIS) will be losing mass at an accelerating pace throughout the 21st century, with a direct link between anthropogenic greenhouse gas emissions and magnitude of loss. Currently, approximately 60 % loss contribution comes from surface melt subsequent meltwater runoff, while 40 are due to ice calving. In ablation zone covered by bare in summer, most energy is provided absorbed shortwave fluxes, which could reduced solar geoengineering measures. However, so far very little known about potential impacts artificial reduction incoming radiation on GrIS budget change production. By forcing regional climate model MAR latest CMIP6 shared socioeconomic pathways (SSP) future emission scenarios (SSP245, SSP585) associated G6solar experiment CNRM-ESM2-1 Earth system model, we estimate local impact constant projected balance (SMB) decrease. Overall, our results show that even case low-mitigation scenario (SSP585), can brought line medium-mitigation (SSP245) reducing downward flux top atmosphere ∼ W/m2 or 1.5 (using experiment). addition global warming SSP245, also decreases efficiency production over sheet damping well-known positive melt–albedo feedback. With respect simulation where remains unchanged, decreasing according radiative scheme mitigates increase 6 %. only more constraining experiments than would allow us maintain SMB until end this century without any emissions.