Home > AGW, Climate Change, Data, GHG, Global Warming, greenhouse effect, Omniclimate, Science > The Star That The Greenhouse Effect Forgot

The Star That The Greenhouse Effect Forgot

And now for some relief from the “Gate du Jour” onslaught…

Obviously there will soon be a much better explanation, but isn’t it peculiar that regarding “what may be the coolest sub-stellar body ever found outside our own solar system” with “a temperature estimate of about 441° Fahrenheit (227° Celsius)“, the explanation for some strange “color” effect in different infrared pictures is that “the atmosphere is cool enough that methane and steam absorb the light coming from below“?

In my colossal ignorance, I had been led to believe that methane and water vapour were powerful greenhouse gases. And that they would make an atmosphere warmer than it would have been without.

Maybe only on Earth 😎

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  1. JJ Charfman
    2010/05/05 at 09:37

    You’re right, you are colossally ignorant. Take some time to learn some phyiscs in detail, study something seriously, and ponder the complex reality of the universe outside of your rectum.

  2. Jim Galasyn
    2010/02/05 at 18:48

    The radiative propeties of gases vary greatly with temperature and pressure. For example, on Titan, nitrogen is a greenhouse gas (http://www.astrobio.net/index.php?option=com_retrospection&task=detail&id=1762).

  3. rogerthesurf
    2010/02/02 at 08:03

    There might be global warming or cooling but the important issue is whether we, as a human race, can do anything about it.

    There are a host of porkies and not very much truth barraging us everyday so its difficult to know what to believe.

    I think I have simplified the issue in an entertaining way on my blog which includes some issues connected with climategate and “embarrassing” evidence.

    In the pipeline is an analysis of the economic effects of the proposed emission reductions. Watch this space or should I say Blog

    http://www.rogerfromnewzealand.wordpress.com

    Please feel welcome to visit and leave a comment.

    Cheers

    Roger

    PS The term “porky” is listed in the Australian Dictionary of Slang.( So I’m told.)

  4. 2010/02/01 at 21:25

    and your point is exactly?

    • 2010/02/01 at 22:42

      the point is that one celestial body where we ought to see the GH effect fully at play, with IR emitted from below and atmosphere full of water vapor and methane, is also one of the coolest “stars” ever photographed…

      • Ben Burningham
        2010/05/05 at 09:19

        Dude. You were right to refer to your colossal ignorance on this matter.

        If the water and methane weren’t absorbing light in the atmosphere of this object it would cool more rapidly.

        Hotter objects don’t show absorption from methane and water because at higher temperatures methane and water cannot exist. It is because it is so cold, in stellar terms, that water and methane are able to exist.

        Finally, the object being discussed is receiving essentially no flux from the outside to heat it, it is just radiating its gravitational potential energy and cooling and contracting (roughly speaking). So the greenhouse effect isn’t really relevant since it deals with a planet/atmosphere/star system.

        You seem to be suggesting that the greenhouse effect should make this object hotter. But, no one with a basic grounding in physics would suggest that stars are hot because of the greenhouse effect.

        That would be silly.

  5. 2010/02/01 at 19:52

    Interesting article, and I agree – it’s nice to escape from the overheated climate debate once in a while and take refuge in the cool of outer space..

    “What has excited astronomers are its very peculiar colors that actually make it appear either very blue or very red, depending on which part of the spectrum is used to look at it.”

    Could they solve the conundrum perhaps, by calling it a purple dwarf? :o)

  1. 2010/02/02 at 00:25

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