Africa's climate response to marine cloud brightening strategies is highly sensitive to deployment region

Marine cloud brightening (MCB), one such approach, proposes to inject sea‐salt aerosol into one or more regional marine boundary layer to increase marine cloud reflectivity. Here, we assess the potential influence of various MCB experiments on Africa's climate using simulations from the Community Earth System Model (CESM2) with the Community Atmosphere Model (CAM6) as its atmospheric component.

We analyzed four idealized MCB experiments under a medium‐range background forcing scenario (SSP2‐4.5), which brighten clouds over three subtropical ocean regions: (a) Northeast Pacific (MCB NEP ); (b) Southeast Pacific (MCB SEP ); (c) Southeast Atlantic (MCB SEA ); and (d) these three regions simultaneously (MCB ALL ). Our results suggest that the climate impacts of MCB in Africa are highly sensitive to the deployment region.