zompist bboard

yup. Also, I'm toying with the idea of having the planet slowly turn into a snowball over a couple of centuries as to turn it into an apocalyptic conworld, actually CO2 condensation is a good thing.

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Articles on Suenu - Amphitrite

That was typed four posts ago...


No. Unless the animal was anaerobic, there is definately a limit to how much CO2 they would be able to take before feeling negative effects.

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Here is another question: How far away from the habitable zone of Suenu's star is the planet that enough CO2 can freeze to decrease its global greenhouse properties? A little frozen CO2 is nil compared to the amount you would need to keep Suenu warm enough for liquid water to remain permanently on its surface, even if it sits just a little bit outside the habitable zone.

Sorry for being pessimistic but I am facing the same issue with my conworld and CO2 has proven difficult to work with for my purposes. I am wondering how you can manage to make it work for yours.

It's not really that far away from the habitable zone... I lost the sheet with the exact numbers, and in fact I don't care about them all that much. I've done the maths and it all more or less adds up everytime I do them, but I forget the details... I guess there's an element of authorial fiat in the astronomy, since terms are broadly defined like "yeah, its a dimmer star, the planet gets less irradiation than earth, the mean surface temp is around 5 °C soooo, yeah". I don't care much about the particulars.

yeah, lazy

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Articles on Suenu - Amphitrite

You can get the snowball effect even without all of your greenhouse gases collapsing. Certainly, it's happened on Earth. And it might be very hard to recover from in this case (also, you have to wonder why it hasn't happened before). I mean, eventually you will recover - the equatorial ice will get dirty and absorb more sun; the oxygen will react out of the atmosphere and be replaced by trace volcanic methane; the star will gradually increase its output etc., but this could take a very, very long time.

On the other hand, you have more favorable air circulation, and the record lows at Earth's south pole only get down to about the freezing point of CO2, so I could imagine that on your planet even in a snowball situation most or all of the surface stays well above the collapse point. If the atmosphere is thicker to begin with (more inert/non-greenhouse gases) then it's even better. You could have a rapid, global glaciation that would be absolutely horrible for the people living there without resorting to, say, eliminating all plant life

I mean, there's apocalyptic and then there's apocalyptic, if you know what I mean.

indeed. I'm thinking more of a glaciation where mean equatorial temp over the year gets to around 2°C, so life sucks and then you die, this happening over a period of a few decades, certainly not a long-lasting snowball earth thing, although that is certainly a possibility if a possitive CO2 freezing cycle happens, at least until volcanism breaks under a significant CO2 sink and it all goes back to normal.

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Articles on Suenu - Amphitrite