The role of cloud-scale resolution on radiative properties of oceanic cumulus clouds |
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Authors: | Evgueni Kassianov Thomas Ackerman |
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Affiliation: | a Pacific Northwest National Laboratory, 902 Battelle Boulevard, PO. Box 999, Richland, WA 99352, USA b University of Miami, Miami, FL, USA |
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Abstract: | Both individual and combined effects of the horizontal and vertical variability of cumulus clouds on solar radiative transfer are investigated using a two-dimensional (x- and z-directions) cloud radar dataset. This high-resolution dataset of typical fair-weather marine cumulus is derived from ground-based cloud radar observations. The domain-averaged (along x-direction) radiative properties are computed by a Monte Carlo method. It is shown that (i) different cloud-scale resolutions can be used for accurate calculations of the mean absorption, upward and downward fluxes; (ii) the resolution effects can depend strongly on the solar zenith angle; and (iii) a few cloud statistics can be successfully applied for calculating the averaged radiative properties. |
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Keywords: | Cloud scale resolution Cloud radar dataset Solar radiation |
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