07-02-2015, 07:39 PM | #11 |
Join Date: Jun 2006
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Re: 8 Suns for 9 days, for one day is spent with none
If you assume heat capacities are constant and the temperature change was insignificant compared to the starting temperature. Since it isn't - clear nightly temperature drops can be 10% of the absolute temperature, and the rate of change goes as the fourth power of the current temperature and 0.9^4 is 0.0656.... Tossing in some reasonable looking numbers I get a factor 2.61 rather than 3, but that would also take me through the freezing point of water for that same set of numbers, which messes up the constant heat capacity assumption big time that doesn't mean a lot.
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07-02-2015, 08:01 PM | #12 |
Join Date: Feb 2005
Location: Berkeley, CA
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Re: 8 Suns for 9 days, for one day is spent with none
Relative humidity determines the dew point, and dew formation releases heat, thus slowing down the temperature drop. However, the bigger factor is bodies of liquid water, as they have a combination of large amounts of heat capacity and reasonably fast heat conduction.
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07-02-2015, 10:04 PM | #13 | |
Untagged
Join Date: Oct 2004
Location: Forest Grove, Beaverton, Oregon
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Re: 8 Suns for 9 days, for one day is spent with none
Quote:
How long can days/nights be before temperature changes get non-conducive to even vaguely earth like multicellular life? Here in Beaverton, the high was 98 and expected low of 63 degrees F. So double nights would cause it to eventually drop to only 7 degrees F?
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07-03-2015, 02:47 PM | #14 |
Join Date: Mar 2008
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Re: 8 Suns for 9 days, for one day is spent with none
You can apparently make ice in the Sahara by exposing thin pans of water to clear night sky. You need to insulate it on the sids and top and put insulation over it during the day but it will freeze in one or two nights. So a 36 hour night on a dry clear area will get ice forming even if it was hot during the day. I'm reading stuff on Tibet for a game you apparently get 90 degree F days and freezing nights during the summer.
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07-03-2015, 08:11 PM | #15 | |
Computer Scientist
Join Date: Aug 2004
Location: Dallas, Texas
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Re: 8 Suns for 9 days, for one day is spent with none
Quote:
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07-05-2015, 08:53 AM | #16 |
Hero of Democracy
Join Date: Mar 2012
Location: far from the ocean
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Re: 8 Suns for 9 days, for one day is spent with none
We're talking about big temperature drops-- its worth noting that if the world is habitable you have exremely heat right before the temperature drops off.
If you don't want the huge temperature drop, you can always have an 'infrared sun' that provides heat but not light. Come to think of it, pit vipers and animals with similar mechnaisms will LOVE the long dark. you can see and much of your prey can't? score!
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07-12-2015, 02:58 AM | #17 |
Computer Scientist
Join Date: Aug 2004
Location: Dallas, Texas
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Re: 8 Suns for 9 days, for one day is spent with none
This isn't a rule here, why would it be there? Blue northers happen when it's already cold, for instance.
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darkness, day, fantasy, night, worldbuilding |
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