The reflected flux from a regular array of 2- and 3-D clouds has been computed to estimate the effect of fractional cloud cover on albedos and the solar flux available to heat the earth's surface. The broken clouds are represented by a regular array of identical cuboids for the 3-D problem and equally spaced, infinitely long, bars for the 2-D problem. A diffusion approximation to the radiative transfer equation is used to compute the fluxes leaving each face of the cloud. Interaction between clouds is simulated by assuming diffuse exi-tance from the cloud faces and applying angle factors to obtain modified boundary conditions on each cloud face.
© 1982 Optical Society of America
J. A. Weinman and Harshvardhan , "Solar reflection from a regular array of horizontally finite clouds," Appl. Opt. 21, 2940-2944 (1982)