Climate impact of marine cloud brightening solar climate intervention under a susceptibility based strategy simulated by CESM2

[Geoengineering News]

https://essopenarchive.org/doi/full/10.22541/essoar.171322700.02512514

Authors 

Chih-Chieh Chen,Jadwiga H. Richter,Walker R. Lee,Mari Rachel Tye,Douglas G. MacMartin,Ben Kravitz

16 Apr 2024

Cite as: Chih-Chieh Chen, Jadwiga H. Richter, Walker R. Lee, et al. Climate impact of marine cloud brightening solar climate intervention under a susceptibility based strategy simulated by CESM2. ESS Open Archive . April 16, 2024.

DOI: 10.22541/essoar.171322700.02512514/v1

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.

Source: ESS OPEN ARCHIVE