My main point is that my substantial physics training leads me to believe that the main impact of GHGs is
vibrational excitation followed by return to the ground state, emitting a photon of the same wavelength but in a random direction, rather than by any significant transfer of internal vibrational energy to thermal energy of surrounding molecules.
The various lines reflect the multitude of quantum transitions that CO2 can undergo from absorbed infrared (IR) radiation, due to its vibrational mode and superimposed rotational modes that are generated by the transient dipole moment CO2 undergoes from
its vibrational excitation.
What is the probability of CO2
vibrational excitation, do you take it for 0?
That process is not electronic excitation, as with visible light, but rather
vibrational excitation, which is based on oscillation of the atoms in the molecule:
Low temperature plasmas are one of the best media for CO2 decomposition — the split - up of the molecule into oxygen and carbon monoxide — both by direct electron impact, and by transferring electron energy into
vibrational excitation.»
The atoms which make the jump to
vibrational excitation soon collide into neighboring atoms, dissipating their vibrational energy throughout the entire brick, making the brick hot throughout.
Not exact matches
However,
excitation of the ν6 in - plane rocking mode in H2CC results in appreciable tunneling - facilitated mixing with highly vibrationally excited states of acetylene, leading to broadening and / or spectral fine structure that is largely suppressed for analogous
vibrational levels of D2CC.
The greenhouse effect is the result of molecules being stimulated into
vibrational, rotational and rovibrational states of
excitation.
Now try to describe the
excitation of a
vibrational state.
This multiplicity of CO2 absorption lines due to combinations of
vibrational and rotational
excitations is not a vague concept, but thoroughly documented.
Collisional
excitation and relaxation of the
vibrational excited states of GHGs is much faster than absorption and emission throughout the troposphere AND most of the stratosphere (local thermodynamic equilibrium).