figure
Total sun intensity at three times during the year at latitude 35° for S⋅B = 1 showing air attenuation. For the clear sky, daily sun Ts are 5.35, 7.86, and 9.80 h; those for the hazy sky are 3.33, 5.64, and 7.31 h in the order of winter, equinox, and summer.

FIG.2 Download High Resolution Image (.zip file) | Export Figure to PowerPoint