This was a good post from Tomas Pueyo on the benefits of SO2 stratospheric injection for ameliorating greenhouse gas temperature rise. See also Professor David Keith’s Group and their work at Harvard, including:

Weisenstein, D. K. and Visioni, D. and Franke, H. and Niemeier, U. and Vattioni, S. and Chiodo, G. and Peter, T. and Keith, D. W. An interactive stratospheric aerosol model intercomparison of solar geoengineering by stratospheric injection of SO2 or accumulation-mode sulfuric acid aerosols. Atmospheric Chemistry and Physics, 2022, Vol 22 #5:2955-2973