This has been sent in by Dr Douglas Hoyt to promote discussion – what do readers think?
The greenhouse effect works by having an additional CO2 molecule absorb radiation and re-emit it back to the surface resulting in a net warming of the system.
The anti-greenhouse effect works by having an additional CO2 molecule being struck by an oxygen or nitrogen molecule which –
1) excites the CO2 molecule which then, in turn, emits radiation, some of it to
space, resulting in a net cooling of the system.
2) The oxygen or nitrogen molecule has lost energy in the process, so is now slower, which is how the cooling is manifested.
Increased greenhouse gases have an absorber/heating function and an emitter/cooling function. It is not clear if the two functions are perfectly balanced but they should probably both be about the same.
The presence of both processes happening could provide an explanation for absence of the tropical hot spot. It could also explain the fact that the effective temperature of the earth has remained at about 255 K to within the accuracy of the measurements ever since it has been observed by satellites.
I haven’t seen any mention of the anti-greenhouse effect in any discussions. If one performs the greenhouse calculations with an instantaneous doubling of CO2, you will overlook the anti-greenhouse effect. This plot at – THE HOCKEY SCHTICK – is supportive of the above remarks.