Rethinking the susceptibility-based strategy for marine cloud
brightening climate intervention: experiment with CESM2 and its
implications
Abstract
Previous modeling studies indicate that even though marine cloud
brightening under a susceptibility-based strategy is effective in
reducing the global average surface temperature, it triggers a La
Niña-like sea-surface temperature response with cooling mostly confined
within lower latitudes. Here we explore a different cloud seeding
strategy involving seeding of regions with low susceptibility.
Simulations with the Community Earth System Model, version 2 (CESM2)
reveal that because the regional forcing is weaker and more widespread,
cooling is more evenly distributed over the globe. This new strategy
also does not result in the La Niña-like state seen in the other
strategies.