This effective radiating level depends on atmospheric composition and, in particular, on those constituents that
absorb terrestrial radiation.
Otherwise, such a hypothesis does not even satisfy the First Law of Thermodynamics (basically, conservation of energy): Without substances in the atmosphere that
absorb terrestrial radiation, the earth's surface at its present temperature would be emitting back out into space way more energy than it receives from the sun and hence would rapidly cool down.
Not exact matches
That
radiation component does not reach the Earth's troposphere since it is
absorbed in the higher, stratospheric
terrestrial layers.
A strong positive feedback mechanism is the accompanying increase of moisture, which is an even more powerful
absorber of
terrestrial radiation.
If the
terrestrial radiation is being
absorbed and warming the air, then it is not available to radiate upwards and downwards.
Clouds play a very complicated first order role in scattering solar
radiation as well as
absorbing and emitting
terrestrial radiation, again, the greenhouse effect.
Maybe you don't believe that website, so here is better one: From: http://www.temis.nl/products/o3tropo.html «Ozone in the upper troposphere acts as a greenhouse gas by
absorbing long - wave
terrestrial radiation.»
3 Greenhouse Effect Key Factors Earth - Sun Temperature Differences Greenhouse Gas Concentrations The atmosphere is transparent to incoming solar
radiation (short wave, high energy), outgoing
terrestrial radiation (longer waves, lower energy) is
absorbed by GHGs.
They have a direct effect by
absorbing and scattering incoming solar and outgoing
terrestrial radiation (1, 2) and an indirect effect by affecting cloud formation (3, 4) and biogeochemical cycles (5).
Terrestrial radiation absorbed by CO2 is immediately thermalized, i.e. the radiant energy
absorbed by CO2 molecules is immediately (about 0.1 nanosecond) transferred (in a process similar to thermal conduction) to other atmospheric molecules which outnumber CO2 molecules 2500 to 1.
CO2 can only
absorb terrestrial EMR that has wave length 14 - 16 microns out of the significant range (mostly within 5 - 50 microns) of
terrestrial radiation.
First of all, let me be clear that what I have talked about is an atmosphere that does not
absorb terrestrial IR
radiation.
In this case, what happens is the whole surface - atmospheric column is now receiving more (
absorbed) solar
radiation than it is emitting
terrestrial radiation to space.