Year length is a single parameter in the input scripts, but of course it's not independent of other values like star temperature and stellar flux. After the experiments with day length (and maybe eccentricity if the exoplasim updates come soon) I've already queued up a set of models with Earth shifted to different points of the sun's habitable zone (though exoplasim isn't great for the outer hab zone with high CO2 levels) and a set with appropriate values for planets in a roughly equivalent spot in the inner habitable zone of m- to a-type stars.
Nikolai Lofving Hersfeldt
2023-05-02 23:59:19 +0000 UTC
I'll dig through the data more when all runs are done, but it's mostly down to slower rotation causing weaker coriolis forces and thus allowing for a wider Hadley cell, thus more efficiently transporting heat from tropics to poles in the upper atmosphere and transporting moisture towards the tropics in the lower atmosphere. I suspect that this is also causing more cloud cover over the tropics, increasing the albedo and so both cooling the tropics locally and the planet as a whole.
Nikolai Lofving Hersfeldt
2023-04-21 12:33:16 +0000 UTC