Yeah, I would initially say that's a good model, until you realize the amount of hardcoded assumptions just like with the weather.

Simply put, we can actually realistically model way to few accurate components to actually be able to tell if it's just math on paper, or actually viable.

What you can do, is take a look at some Nasa pics, and see how the earth locked back then, and now, and see where the green went, and correlate some things.

But what do I know...