Translucent gas at or above the temperature
above radiative equilibrium can not absorb flux.
Not exact matches
... interestingly in the grey gas case with no solar heating of the stratosphere, increasing the optical thickness of the atmosphere would result in an initial cooling of and in the vicinity of the skin layer (reduced OLR), and an initial
radiative warming of the air just
above the surface (increased backradiation)-- of course, the first of those dissappears at full
equilibrium.
He found that convective
equilibrium holds in the lower part of the troposphere up to about 10 Km, while
radiative holds
equilibrium above.
Molnar, P., and K. A. Emanuel, Temperature profiles in
radiative - convective
equilibrium above surfaces of different heights, J. Geophys.
If one inserts a thin and stationary horizontal adiabatic wall (well... ok, «insulated wall») at any height L within a gas column at
equilibrium (no net diffusive,
radiative or convective heat flows within this column) then the pressure on both sides of the wall integrated over its surface match the weight of the column
above.
[For each month, I'd choose the set grid cells immediately
above the top of the fixed lapse rate, expecting this to be the lowest altitude where convection doesn't disturb
radiative equilibrium.