Man-Made Global Warming Theory Takes Major Hit

Discussion in 'Environment & Conservation' started by Josephwalker, Jul 12, 2019.

  1. yguy

    yguy Well-Known Member

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    You're trying to switch from a QM interpretation to a classical interpretation in the same breath, which is part of the reason you're not making sense. A photon doesn't react to "the energy of the Earth's surface", it reacts to the atoms/molecules it encounters; and most of the molecules at the surface being H2O, every one that emits an IR photon can then absorb one from an airborne H2O molecule at night.
    Then providing a verbatim quote and link won't be a problem, so get the hell on with it already.
    made up so you could have something to find fault with and pretend the fault lies with me? Obviously not.
     
  2. skepticalmike

    skepticalmike Well-Known Member

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    This is from scienceblogs.com, "Greenhouse theory violates the laws of thermodynamics". Most of this has been said before but I like the emphasis on net flow of heat.

    Given a warmer and a cooler body exchanging energy either through convection or through radiation, the fact is, energy is constantly being exchanged in both directions. The second law of thermodynamics does not apply to individual photons, it applies to the net flow of energy in the entire system. How could it be otherwise?

    When an excited molecule of CO2 releases a photon, it does not somehow "know" which way to send it. It can not aim it towards a cooler body. It is simply released in a random direction. In the case of CO2 in the atmosphere, having absorbed some of the energy radiating towards space from the surface of the earth, this random choice of direction means that, roughly speaking, half of that energy is sent back. An individual molecule is not influenced at all by the temperature of the earth's surface, be it warmer or cooler.

    Where the second law does apply is in the net flow of heat, and this happens because a warmer body will send out more energy overall than it is receiving from the cooler one. Lots of energy going back and forth, but on balance more is leaving the warmer body.


    This is from realclimate.org, "Can a blanket violate the 2nd law of thermodynamics".

    The cool Earth also sends thermal radiation towards the hot sun – how would thermal radiation leaving Earth know how warm the surface is that it’s going to hit? It’s just that the sun sends more radiation back to us – the net flow is from hot to cold. More is not implied by the second law of thermodynamics.
     
    Last edited: Sep 10, 2019

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