Climate impact of marine cloud brightening solar climate intervention
under a susceptibility based strategy simulated by CESM2
Abstract
The efficiency of marine cloud brightening in cooling Earth’s surface
temperature is investigated by using a medium ensemble of simulations
with the Community Earth System Model version 2 (CESM2). Various cloud
seeding schemes based on susceptibility are examined to determine what
area extent will be required to induce 1oC cooling under SSP2-4.5.
The results indicate that cloud seeding over 5% of the ocean area is
capable of achieving this goal. Under this seeding scheme, cloud seeding
is mainly deployed over lower latitudes where strong surface temperature
and precipitation responses are induced. The simulations also reveal
that the 5% cloud seeding scheme induces an overall reduction in global
precipitation, with an increase over land and a decrease over the
ocean.