Effect of spatial organization on solar radiative transfer in three-dimensional idealized stratocumulus cloud fields

To relate the error associated with 1D radiative calculations to the geometrical scales of cloud organization and/or in-cloud optical inhomogeneities, a new idealized methodology, based on a Fourier statistical technique, has been developed. Three-dimensional cloud fields with variability over a sel...

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Bibliographic Details
Published in:Journal of the atmospheric sciences 2003-08, Vol.60 (15), p.1774-1794
Main Authors: DI GIUSEPPE, F, TOMPKINS, A. M
Format: Article
Language:English
Subjects:
Clouds
Earth, ocean, space
Exact sciences and technology
External geophysics
Meteorology
Radiative transfer
Radiative transfer. Solar radiation
Stochastic models
Thermodynamics
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Description
Summary:To relate the error associated with 1D radiative calculations to the geometrical scales of cloud organization and/or in-cloud optical inhomogeneities, a new idealized methodology, based on a Fourier statistical technique, has been developed. Three-dimensional cloud fields with variability over a selected range of horizontal spatial scales and consistent with vertical structure can be obtained and controlled by a small number of parameters, which related directly to the dynamical and thermodynamical meteorology of the situation to be examined. The initial study deals with marine stratocumulus. The PP bias in reflectivity was also found to be around 5% for both cases, comparable to the IPA bias, and smaller than previous estimates for this cloud type.
ISSN:0022-4928
1520-0469
DOI:10.1175/1520-0469(2003)060<1774:EOSOOS>2.0.CO;2