Re: Help with thick atmosphere world

IsaacKuo wrote:
Before getting into such detail, I just need to get some gross
global effects down. The annual solar irradiation is roughly
77% of Earth's, and yet I want to have global average
temperatures to exceed Earth's (so the arctic temperate zone
isn't freezing cold). Since Earth already has decent ocean
coverage, I don't think I can make up the difference just by
increasing ocean coverage. Increased greenhouse gases
seems promising, but I don't know how to calculate how
much of an effect it has.

I don't either, but do you need an exact figure, given that the characters in your story have no way to measure it? Put more CO2 into the atmosphere. My guess is that it'll make the place reasonably warm before it makes the atmosphere unbreathable (on the grounds that there's a few orders of magnitude margin between the amount of CO2 we have on Earth and the amount that starts becoming toxic); that would seem good enough?
.

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