Abstract
AbstractA Monte Carlo model of short‐wave radiative transfer in a broken cloud field is described. Output from the model is presented and the effect of cloud shape and depth, droplet absorption and water vapour absorption on the effective fractional cloud cover, Ne, is investigated. Inhomogeneities are introduced into the cloud field in the form of a variable cloud width and a cloud optical depth which is dependent upon cloud cover. It is shown that these inhomogeneities lead to much better agreement between the modelled values of Ne and experimental values derived from data collected with the Meteorological Research Flight Hercules. the conclusion is that Ne is a nonlinear function of the fractional cloud cover, N, which may be approximated by the relationship Ne = N2.
Published Version
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