Cementafriend's comment

[Sunsettommy]

From HERE

Quote:cementafriend says:
January 7, 2012 at 5:21 am

Tallbloke mentions definitions. Please note the following definition in chapter 5 of Perry’s Chemical Engineering Handbook -Heat and Mass Transfer p 5-24 Nature of Thermal Radiation “The characteristic properties of a blackbody are that it absorbs all the radiation incident on its surface and that the quality and intensity of the radiation it emits are completely determined by its temperature. The total radiative flux throughout a hemisphere from a black surface of area A and absloute temperature T is given by the Stefan-Boltzman law Q=A*sigma*T^4.

Note the word surface and hemisphere. A gas has no surface therefore, regardless of what the physicists and AGW proponents like to think, the Stefan-Boltzman law (equation) does not apply to gases in the atmosphere. Further, there are no blackbodies. It has been shown that radiation from the sun does not follow exactly the Planck distribution. Also, no one knows the diameter of the sun. Prof Olivier Manual has issued papers indicating that the sun has a solid core. Thus it is possible or likely that the sun has a surface but no one knows its area. It would be interesting for someone to determine the gravitional affects on the sun’s temperature profile.

Prof Hoyt Hottel at MIT performed measurements and research on radiation from and to gas clouds. He found a relationship for radiation absorptivity which involved partial pressures and path length. This allowed some calculations for the design of furances and heat exchangers. I will let others speculate why no reference to Prof Hottel’s work is made by the so-called climate science. My simple suggestions is that none of them have the capacity to understand the complexities of heat and mass transfer.

[Sunsettommy]

From HERE

Quote:cementafriend says:
January 7, 2012 at 11:21 am

Tallbloke, Trenberth’s cartoon is nonsense. In an email to Dr Noor Van Andel, Trenberth admitted that the radiation “window” was 66watts/m2 (from satellite measurements) and not 40 as in his cartoons (K&T97 and T,F&K2009). Then he complains of the missing heat of 0.9 W/m2. There is no back radiation and he knows it.