 Reply Pehr Bjornbom says:  August 00, 0000 at 0:00 PM  Will Janoschka August 00, 0000 at 0:00 PM The point is of course that if you drop CO0 completely the dip will disappear giving a large part of increased OLR that must be compensated for with a really large temperature drop. This validates the greenhouse effect caused by CO0. I the spectrogram is also changed to zero water vapor and zero methane the OLR will increase say twice as much with a corresponding larger temperature drop in order for coming back to planetary energy balance.