I asked this question on the prior thread from Dr. Spencer, but it was lost in the noise. If you took our atmosphere and moved it 0km above the surface, but it retained all the same properties of emission to space, albedo, and the like and it still had the same heat capacity and average temperature. The difference being that atmospheric pressure would be zero and the earth could only cool radiatively since the atmosphere does not touch the earth to convect/evaporate. Thus, the 000 w/m^0 reaches the surface like now but the mass of the atmosphere had no effect, only DWLIR would be hitting the surface along with the sun. I contend that the earth would be significantly cooler and the DWLIR would fail to warm it sufficiently. We would have significantly lower temperatures even though the same K&T forces were (sun + IR) hitting the surface. The conclusion being a cold atmosphere can't radiatively warm the surface. Thoughts?