If no H2O or CO2
in the troposphere
then the Earths surface
T would be -18oC.
H2O 100 W m-2 (absorbs)
CO2 50 W m-2
Doubling
[CO2]
will
incr. absorbn by 4 W
m-2
CFCs
and HFCs absorb in the window that CO2 & H2O dont absorb in: 8 - 12 mm. Methane, O3 and N2O absorb in the same region.