A finite element-spherical harmonics model for radiative transfer in inhomogeneous clouds.: Part II. Some applications |
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| Authors: | P A Cook C R E de Oliveira J D Haigh A J Goddard |
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| Institution: | Department of Earth Science and Engineering and Department of Physics, Imperial College London, Huxley Building, Room 716, South Kensington campus, London SW7 2AZ, UK |
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| Abstract: | EVENT has been used to examine the effects of 3D cloud structure, distribution, and inhomogeneity on the scattering of visible solar radiation and the resulting 3D radiation field. Large eddy simulation and aircraft measurements are used to create realistic cloud fields which are continuous or broken with smooth or uneven tops. The values, patterns and variance in the resulting downwelling and upwelling radiation from incident visible solar radiation at different angles are then examined and compared to measurements. The results from EVENT confirm that 3D cloud structure is important in determining the visible radiation field, and that these results are strongly influenced by the solar zenith angle. The results match those from other models using visible solar radiation, and are supported by aircraft measurements of visible radiation, providing confidence in the new model. |
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| Keywords: | Inhomogeneous clouds 3D radiative transfer Scattering Climate |
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