Extreme climate response to marine cloud brightening in the arid Sahara-Sahel-Arabian Peninsula zone

Purpose Climatic extreme events are predicted to occur more frequently and intensely will significantly threat the living of residents in arid semi-arid regions. Therefore, this study aims assess climatic extremes’ response emerging climate change mitigation strategy using a marine cloud brightening (MCB) scheme. Design/methodology/approach Based on Hadley Centre Global Environmental Model version 2-Earth System model simulations MCB scheme, used six indices [i.e. hottest days (TXx), coolest nights (TNn), warm spell duration (WSDI), cold (CSDI), consecutive dry (CDD) wettest five (RX5day)] analyze spatiotemporal evolution Sahara-Sahel-Arabian Peninsula Zone with without implementation. Findings Compared Representative Concentration Pathways 4.5 scenario, from 2030 2059, implementation is decrease mean annual TXx TNn by 0.4–1.7 0.3–2.1°C, respectively, for most zone. It would also shorten WSDI index 118–183 CSDI only 1–3 days, especially southern In terms precipitation, could CDD 5–25 whole Sahara Sahel belt increase RX5day approximately 10 mm east part during 2030–2059. Originality/value The results provide first insights into impacts