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Thread: Venus's greenhouse effect?

  1. #1
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    Venus's greenhouse effect?

    I seem to remember hearing about how Venus, as it turns out, is actually cooling off and not getting hotter, meaning that it wasn't hot to begin with because of a greenhouse effect. Is this correct? If so could anyone ellaborate?

    Thanks.

  2. #2
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    Here's a current theory that early in its history Venus had a milder climate. I don't know how accepted the theory is though.

  3. #3
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    Well, did a bit of looking around (Google, Space.com, Universe Today), and I found nothing either implicitly or explicitly stating anything about the average surface temperature of Venus (a toasty 735 K, the highest in the solar system; it doesn't vary from day to night or from equator to poles, but does decrease with altitude) dropping. So no, the planet does not seem to be cooling off.

    As for the debate on how it became so hellish, you can check the link TriangleMan posted, or go to some of the links below (TM's link seems to define the "runaway greenhouse" somewhat differently). Also, regardless of how it became that way, the reason Venus stays so hot right now is indeed because of the greenhouse effect caused by carbon dioxide. You can find this on any page (except those of neo-Velikovskian and related kooks, of course) regarding the solar system or Venus in particular (side note: people who doubt that CO2 is a greenhouse gas may want to take our sister planet into consideration).

    http://solarviews.com/eng/venus.htm
    http://www.nineplanets.org/venus.html
    http://www.solstation.com/stars/venus.htm

    Also, if you have it or can find it, the article "Global Climate Change on Venus" from Scientific American's "New Light on the Solar System" mini-issue is a must read.

  4. #4
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    Thanks. You see I just barely remember reading something about it awhile ago, to the point where I wasn't even sure whether I had actually read it or not. Or where I had read it, if I had.

  5. #5
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    What would it take to cool Venus off to terrestrial levels?

  6. #6
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    Quote Originally Posted by tjm220
    What would it take to cool Venus off to terrestrial levels?
    A really big beach umbrella. :wink:

  7. #7
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    Quote Originally Posted by Donnie B.
    Quote Originally Posted by tjm220
    What would it take to cool Venus off to terrestrial levels?
    A really big beach umbrella. :wink:
    Cool.

  8. #8
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    Quote Originally Posted by tjm220
    Quote Originally Posted by Donnie B.
    Quote Originally Posted by tjm220
    What would it take to cool Venus off to terrestrial levels?
    A really big beach umbrella. :wink:
    Cool.
    It'd still have the crushing air pressure though.
    Calm down, have some dip. - George Carlin

  9. #9
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    We have had previous discussions about terraforming Venus, including this one
    At night the stars put on a show for free (Carole King)

    All moderation in purple - The rules

  10. #10
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    Quote Originally Posted by Donnie B.
    Quote Originally Posted by tjm220
    What would it take to cool Venus off to terrestrial levels?
    A really big beach umbrella. :wink:
    Or a really big vacuum cleaner...

  11. #11
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    Quote Originally Posted by Zero Signal
    (side note: people who doubt that CO2 is a greenhouse gas may want to take our sister planet into consideration).
    Are there any?

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