https://www.sciencedirect.com/science/article/abs/pii/S0048969724049660
*Authors* Mou Leong Tan, Yi Lin Tew, Juneng Liew, Govindasamy Bala, Mari R. Tye, Chun Kiat Chang, Nurfashareena Muhamad *15 July 2024* https://doi.org/10.1016/j.scitotenv.2024.174817 *Highlights* •G6sulfur may exacerbate dry spells of the Muda River basin (MRB) in the future. •G6solar and G6sulfur modulate the MRB's climate increases of SSP585 to match SSP245. •G6solar, G6sulfur and SSP245 project ~2 °C temperature increase in the MRB. •G6solar and G6sulfur modulate increases precipitation extremes to match SSP245. •Future studies should consider more SRM experiments and hydro-climatic modelling. *Abstract* The concept of solar geoengineering remains a topic of debate, yet it may be an effective way for cooling the Earth's temperature. Nevertheless, the impact of solar geoengineering on regional or local climate patterns is an active area of research. This study aims to evaluate the impact of solar geoengineering on precipitation and temperature extremes of the Muda River Basin (MRB), a very important agricultural basin situated in the northern Peninsular Malaysia. The analysis utilized the multi-model ensemble mean generated by four models that contributed to the Geoengineering Model Intercomparison Project (GeoMIP6). These models were configured to simulate the solar irradiance reduction (G6solar) and stratospheric sulfate aerosols (G6sulfur) strategies as well as the moderate (SSP245) and high emission (SSP585) experiments. Prior to the computation of extreme indices, a linear scaling approach was employed to bias correct the daily precipitation, maximum and minimum temperatures. The findings show that the G6solar and G6sulfur experiments, particularly the latter, could be effective in holding the increases in both annual and monthly mean precipitation totals and temperature extremes close to the increases projected under SSP245. For example, both G6solar and G6sulfur experiments project increases of temperature over the basin of 2 °C at the end of the 21st century as compared to 3.5 °C under SSP585. The G6solar and G6sulfur experiments also demonstrate some reliability in modulating the increases in precipitation extreme indices associated with flooding to match those under SSP245. However, the G6sulfur experiment may exacerbate dry conditions in the basin, as monthly precipitation is projected to decrease during the dry months from January to May and consecutives dry days are expected to increase, particularly during the 2045–2064 and 2065–2084 periods. Increases dry spells could indirectly affect agricultural and freshwater supplies, and pose considerable challenges to farmers. Graphical abstract [image: Unlabelled Image] *Source: ScienceDirect * -- 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 on the web visit https://groups.google.com/d/msgid/geoengineering/CAHJsh9-Zu%2BZ9fvthE5t35XoYETfn%2B97s%3DnmkoxDQetApcPThqg%40mail.gmail.com.
