Schewski, Mario, Macke, Andreas, Scheirer, Ronald, Jung, Thomas and von Bremen, Ludger (2001) Parameterization of solar cloud radiative fluxes for 3D mixed phase clouds. In: IRS'2000: Current Problems in Atmospheric Radiation. , ed. by Smith, W. L. and Timofeyev, Y. M.. A. Deepak Publishing, Hampton, Virginia, pp. 249-252.

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Abstract

The present work investigates to what extend the
available cloud informations from large scale, i.e., noncloud-resolving atmospheric models can be used to parameterize the radiative fluxes of 3D clouds. To this end, domain averaged cloud properties from mesocale 3D cloud models arc correlated with domain averaged results from solar broadband 3D radiative transfer calculations for the same clouds. An EOF-analysis shows that albedo, total transmission and absorption (diffuse and direct transmission) are strongest correlated with liquid water path and cloud bottom height (rain water path and cloud cover). A multidimensional quasinonlinear
parameterization provides a good correlation
betwcen true and parameterized cloud radiative
fluxes. Although the quality of this parameterization may partly be due to the limited number of cloud realizations used in this study, the results suggest that domain
averaged solar radiative fluxes may in principle
be parameterized in terms of average cloud properties.

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