| (a) Normalized blackbody curves for 5780 K and 220 K, plotted so that irradiance is proportional to the areas under the curves. (c) Atmospheric absorption in clear air for solar radiation with a zenith angle of 50 degrees and for diffuse terrestrial radiation. (b) Same as (c) but for the portion of the atmosphere lying above the 11-km level, near the middle latitude tropopause. [From Wallace and Hobbs, p. 332] |