Ai2 Climate Emulator (ACE) is a family of models designed to simulate atmospheric variability from the time scale of days to centuries.
ACE-climSST is the original ACE model, as described in
ACE: A fast, skillful learned global atmospheric model for climate prediction.
It is trained on output from the FV3GFS atmospheric model forced with annually-repeating climatological sea surface temperature.
Note the checkpoint provided here is the same as the one in
this Zenodo repository, just with the optimizer state removed to decrease the checkpoint size.