Comment by jamesmurdza

As an engineer but not a climate scientist, it is really difficult to make sense of these models. They come in at least three levels of complexity, where simpler ones are used to verify the output of the more complex ones.

If you want to try, Hector is a great one to start with: https://github.com/JGCRI/hector

I wrote a little blog post with an overview of some of the open source models: https://possibleplanets.com/2022/05/06/how-to-forecast-the-c...