how many of you think it is a deception to have 390 (W/m2) going up and 324 coming down? while it is true in an absolute way it disguises the fact that only 66 w/m2 is available as the difference between the temps of the surface and the lower atmosphere. out of that 66, 40 leaves directly with only 26 W/m2 warming the lower atmosphere. so 26 W/m2 is the greenhouse effect and I have never seen any estimates higher than 26% for CO2's share of the GHE so that means ~8 W/m2 or less for the total amount of CO2. the absorption of CO2 is logrithmic so that means we are into the ninth doubling (256-512) so every doubling is ~(8W/m2)/8 doublings= 1 W/m2 or less. I find it hard to believe that something that is responsible for ~1 W/m2 is the grand control knob of the climate. it is an amount that is lost in the error bars of measurement. but that is just my opinion but now you know why I think that way.