"Alastair" wrote:
On Thursday, April 2, 2015 at 6:15:08 PM UTC+1, Togless wrote:
"Alastair" wrote:

It is the heat flow through the atmosphere that I say is
being modelled incorrectly. Absorption in the CO2 bands
is saturated, see Zhong and Haigh (2013).

True at the surface, but increases in atmospheric CO2 do reduce OLR to
space
at the top of the atmosphere, and the effects percolate down through the
atmosphere, warming the surface.

If the absorption is saturated at the base of the atmosphere then
there is no radiation for CO2 to reduce at the top of the atmosphere.

There is, because the whole atmosphere radiates in the infrared.