On Monday, 17 February 2014 13:09:37 UTC+1, Togless wrote:
"matt_sykes" wrote:



What happened was this, when the fed the 1.2C per

100% into the climate models in the late 90s they

couldn't recreate the previous 30 years unless they

added a big positive feedback which multiplied that

1.2 C up to 4 C.



The feedback they chose was simplistic. Water Vapour.

snippage



It might be worth having a read of Arrhenius's 1896 paper, "On the Influence

of Carbonic Acid in the Air upon the Temperature of the Ground".



http://nsdl.org/sites/classic_articles/Article4.htm



Page 263 shows that even at this time it was already well known that

relative humidity tends to be conserved - i.e. if temperature rises,

absolute humidity also rises, and that of course amplifies the initial

warming because of the rise in the water vapour greenhouse effect. It's a

straightforward principle of physics,

Didn't I call it simplistic?


The fact is that in all of this, you, Arrhenius's and every one else forgets is that the climate is not simple.

Anyway, did you even bother to look at the NASA WV graph? Regardless of whatever the surface temperature has done in the last 30years, WV has decreased. Which is a big nail in the coffin of AGW theory as a threat to anything.