Slaying the Sky Dragon: Death of the Greenhouse Gas Theory
11-29-2010, 11:48 AM
RE: Slaying the Sky Dragon: Death of the Greenhouse Gas Theory
Q_C, thanks for that maths link. Will be very helpfull.
I've got the e-book and it was well worth the effort and the money just to read the following quote and get my mind all screwed up:
Quote:As for the famous minus 18C surface temperature that earth is supposed to have without the greenhouse effect, that figure assumes a blackbody surface absorbing about 239W/m^2 "on average." But check the Kiehl-Trenberth chart. Due to clouds and other obscuring factors, the actual surface average is given as only 168W/m^2. That figure corresponds to minus 40C on the surface, meaning that it has to rise by 55 degrees, not 33, in order to reach the accepted average of plus 15. Anyone who tells you, then, that the 'greenhouse effect' makes the earth's surface 33 degrees warmer is merely confessing his (or her) own ignorance.
Check; minus 40C equals 233.15K. Put that into the formulae
E = 1.0 * sigma * T^4 (for a 'blackbody', hah!)
where sigma equals 0.000000057 (5.7e-8)
and T equals 233.15
and you get 168W/m^2.
Here is a chart showing that 168W/m^2:
If you use an average global absorbance/emissivity figure of 0.7 (i.e. a very poor 'greybody') you can get that -18C for the surface at 168W/m^2 so did Kiehl-Trenberth do something like that? Thats a very low figure, 0.7, more ususally around 0.9. This of course means that any 'greenhouse' effect must be that much stronger to push the temperature up by 33 degrees. Ah, well, more puzzles to figure out.
CO2 comes from coal, coal comes from fossilised trees, fossilised trees come from living trees, living trees growth comes from CO2 therefore coal is carbon neutral. ...from here
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