Where’s that IR coming from towards the surface? CO2 collides and hands off what it absorbed 99% of the time. So, which gas sends it back to the surface?Not by CO2. If the energy moves, how does CO2 reemit?The atmosphere. Duh.
You said photons are absorbed by CO2, never to be re-emitted.
The Equipartition Theorum states that a volume of gas under the same conditions will both emit and absorb the same amount of radiation that it is capable of producing. In all directions and in an amount proportional to its temperature.
Any thin slice of the atmosphere is doing this except for near the surface, and near the emission escape height. The atmosphere is warming near the surface due to excess radiation from a warmer source. High up the atmosphere is cooling by sending radiation to space. Both are happening, ypu can't have just one or the other.
The amount of energy being returned to the surface by various pathways must equal the difference between what comes in from the 15C surface and what goes out from the -50C top of the atmosphere.
CO2 collides and hands off what it absorbed 99% of the time.
Is CO2 only allowed to lose energy when it collides?
Does CO2 ever gain energy when it collides?
Of course it does...but then that energy is immediately lost via collision and the conduction of the energy through the troposphere continues..there is no radiative greenhouse effect as described by climate science.....a radiative greenhouse effect is not possible in a troposphere so completely dominated by pressure and convection.
Of course it does...but then that energy is immediately lost via collision and the conduction of the energy through the troposphere continues.
So you agree with jc456, CO2 absorbs IR and never ever emits IR.
a radiative greenhouse effect is not possible in a troposphere so completely dominated by pressure and convection.
A greenhouse prevents energy from escaping, just as you and jc456 claimed CO2 does.