https://essopenarchive.org/users/881160/articles/1260088-assessing-the-response-of-surface-cloud-radiative-effects-to-stratospheric-aerosol-injection-over-west-and-central-africa
*Authors* Atanas Dommo, Francis Nkrumah, Kwesi A Quagraine, Nana Ama Browne Klutse, Gandome Mayeul Leger Davy Quenum *18 January 2025* *Abstract* Solar radiation management with stratospheric aerosol injection has been proposed as a potential mechanism to mitigate global warming and prevent it from reaching the tipping point. This study investigates the response of surface cloud radiative effects (CREs) to stratospheric aerosol injection (SAI) relative to Shared Socio-Economic Pathways (SSP2-4.5) across three regions: southern West Africa (SWA), Central Africa (CA) and the Sahara (SA). We utilize simulations from the Community Earth System Model version 2 (CESM2) with the Whole Atmosphere Community Climate Model version 6 (WACCM6) under SAI deployment, comparing the outputs to those from the SSP2.4-5 scenario, which aligns with current climate policy scenarios. The findings indicate that SAI has the potential to mitigate the decreasing trend of shortwave cloud cooling by -0.7W/m², -0.81W/m², -0.17W/m², while enhancing the longwave warming by +1.11W/m², +0.65W/m² and +0.31W/m², over CA, SWA, and SA, respectively. However, it is important to note that these observed changes may be attributable to natural variability rather than the direct effects of SAI, and should be taken with caution. An exception is the longwave cloud warming, which exhibits robust changes over CA. The results also reveal that changes in shortwave cloud cooling effect demonstrate high sensitivity to changes in liquid water path whereas changes in longwave cloud warming tend to exhibit greater sensitivity to variations in cloud fraction. It is noteworthy that current simulations involving SAI lack sufficient variables to facilitate comprehensive comparisons among different outputs. *Source: ESS Open Archive* -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/d/msgid/geoengineering/CAHJsh99D4ijaEO%3DpPm3Ex8eOd3Jp6q%2BJjMxignFz06MC9jVhyA%40mail.gmail.com.
