But effective residence time is much longer because of
the equlibrium (or near equlibrium) between surface ocean and atmosphere and biosphere and atmosphere.
I am agreeing that convection has been modeled, & I agree that the GCMs have included
an equlibrium energy - in equals energy - out at the TOA.
Why doesn't the daily temp swing of 10 - 15 degrees on both sides of
the equlibrium force the atmosphere to adopt the equilibrium in = out value?
At low temperatures
the equlibrium is strongly on the side of the lower energy state, but this effect is not true to the same extent at high temeratures, because the ratio of of the exponentials in the Arrhenius law moves closer to unity with increasing temperature.
The equlibrium between drawdown and production hence defines oxygen concentrations.