Here is a paper from 2010: https://www.pnas.org/content/107/38/16428
I’m thinking of something going back into the possibly early 1990s. Oppenheimer/Teller...one of the A-Bomb folks.
Here’s a reference to a Teller-Woods proposal, that I can’t seem to find the original article on:
https://www.wired.com/2008/06/ff-geoengineering/