We didn't find any quantitative and peer-reviewed projections of cooling, or we would have included them. If you know of any, please let me know and I'll publish an update to the paper.
Rasool and Schneider 1971 [1] https://pdfs.semanticscholar.org/4db2/1045b17ebcdd6a8c6adeb1...
Earl Barrett 1971 https://www.sciencedirect.com/science/article/abs/pii/003809...
Hamilton and Seliga 1972 https://www.igsoc.org/journal/14/72/igs_journal_vol14_issue0...
Chylek and Coakley 1974 https://science.sciencemag.org/content/183/4120/75
Bryson and Dittberner 1976 https://journals.ametsoc.org/doi/pdf/10.1175/1520-0469%28197...
Sean Twomey 1977 https://journals.ametsoc.org/doi/pdf/10.1175/1520-0469%28197...
[1] edit: Schneider later retracted findings