Incoming longwave radiation as a function of air temperature estimated with the Konzelmann-formulation, compared with the outgoing longwave radiation calculated with the surface temperature set equal to the air temperature, for four different meteorological situations:
Blue (same as green) = overcast sky; h=100%. Green = overcast sky; h = 60%.
Turquoise = clear sky; h = 100%. Red = clear sky; h = 60%.
Violet = outgoing radiation.