Stabilizing the Temperature On a Planet With a (Very) Long Day

Let's say my terrestrial planet has a stable circumbinary orbit around two suns similar to the Kepler-47 system, in the habitable zone, with an orbit similar to Kepler-47c. The challenge here is that I'm trying to set it up similarly to Venus, with a retrograde rotation (probably from an ancient catastrophic collision that created my planet's moon) that takes 340 Earth days to complete. That means approximately 170 days from sun(s)up to sun(s)down.

The trouble is attempting to equalize the temperature. I'd prefer to keep the temperature between 75ºC and -100ºC ... preferably a little less extreme. In real life, Venus's temperature is the same everywhere thanks to its incredibly dense atmosphere. Is there a way I can distribute the temperature?

From what I understand, a high amount of water should help retain the temperature, and the temperature difference itself ought to create powerful storms and winds, which will, again, distribute the heat. And I think a high albedo might stop some heat (though that didn't work out too well for Venus), but I'm not sure what to do about the cold. What else can I do mitigate the temperature effects of such a long day? I've also heard that a slow-rotating planet will have a cooler equator and warmer poles... is that true?

If it's not possible to stabilize the climate somewhat, just let me know.

One more thing"¦Â I'm only mostly hopeless okay at math. If someone could direct me to the equations necessary to work all of this out myself (or an online resource for it), I would be very appreciative.

posted about 9 years ago

Midwinter Sun‭

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