Summary
Parameterization programs for cloud microphyscs and radiative transfer involving ice clouds have been developed in terms of the mean effective size and ice water path. The mean effective size appears to be adequate in representing the ice crystal size distribution for radiative parameterizations. For a given ice water path, smaller mean effective sizes reflect more solar radiation, emit more IR radiation and enhance net radiative heating/cooling at the cloud top and bottom than larger sizes. The presence of small ice crystals may generate steeper lapse rates in clouds. A 3-D global cloud model that prescribes the horizontal wind fields in a 24 hour period is used to investigate the sensitivity of the mean effective size of ice crystals on the simulation of radiative heating, temperature, cloud cover and ice water content. A variation in the mean effective size from 75 to 50 μm in a 24 hour prediction on simulation generates more cooling above the high cloud top and a decrease of temperature. These results lead to an increase of high cloud cover in some latitudes by as much as 4% and, at the same time, a decrease of middle cloud cover by 3–4% in latitudes between 60°S and 60°N.
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References
Asano, S., Sato, M., 1980: Light scattering by randomly oriented spheroidal particles.Appl Opt. 19, 962–974.
Auer, A. H., Jr., Veal, D. L., 1970: The dimension of ice crystals in natural clouds.J. Atmos. Sci. 29, 919–926.
Henderson-Sellers, A., 1986: Layerd cloud amounts for January and July, 1979 from 3-D Nephanalysis.J. Climate Appl. Meteor.,25, 118–132.
Heymsfield, A. J., 1972: Ice crystal terminal velocities.J. Atmos. Sci.,29, 1348–1357.
Heymsfield, A. J., 1977: Precipitation development in stratiform ice clouds: A microphysical and dynamical study.J. Atmos. Sci.,34, 367–381.
Heymsfield, A. J., Platt, C. M. R., 1984: A parameterization of the particle size spectrum of ice clouds in terms of the ambient temperature and the ice water content.J. Atmos. Sci.,41, 846–856.
Heymsfield, A. J., Donner, L. J., 1990: A scheme for parameterizing ice-cloud water content in general circulation models.J. Atmos. Sci.,47, 1865–1877.
Hobbs, P. V., Chang, S., Locatelli, J. D., 1974: The dimensions and aggregation of ice particles in natural clouds.J. Geophys. Res.,79, 2199–2206.
Jayaweera, K., Cottis, R. E., 1969: The fallvelocities of plate-like and columnar ice crystals.Quart. J. Roy. Meteor. Soc.,95, 703–709.
Lee, J. L., Ou, S. C., Liou, K. N., 1990: The effects of ice processes and infrared cooling on the formation of high clouds in a 3-D global cloud model. Preprint,The Seventh Atmospheric Radiation Conference, San Francisco, July 23–27, American Meteorological Society, Boston.
Liou, K. N., Zheng, Q., 1984. A numerical experiment on the interactions of radiation clouds and dynamic processes in a general circulation model.J. Atmos. Sci.,41, 1513–1535.
Liou, K. N., Fu, Q., Ackerman, T. P., 1988: A simple formulation of the delta-four-stream approximation for radiative transfer parameterizations.J. Atmos. Sci.,45, 1940–1947.
Smith, R. N. B., 1990: A scheme for predicting layer clouds and their water content in a general circulation model.Quart. J. Roy. Meteor. Soc.,116, 435–460.
Starr, D. C., Cox, S. K., 1985: Cirrus clouds. Part I: A cirrus cloud model.J. Atmos. Sci.,42, 2663–2694.
Sundqvist, H., 1988: Parameterization of condensation and associated clouds in models for weather prediction and general circulation simulation. In: Schlesinger, M.E., (ed),Physically-Based Modelling and Simulation of Climate and Climate Change, Reidel, pp 433–461.
Tanako, Y., Liou, K. N., 1989a: Radiative transfer in cirrus clouds. I. Single-scattering and optical properties of hexagonal ice crystals.J. Atmos. Sci.,46, 3–19.
Takano, Y., Liou, K. N., 1989b: Radiative transfer in cirrus clouds. II. Theory and computation of multple scattering in an anisotropic medium.J. Atmos. Sci. 46, 20–36.
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Liou, K.N., Lee, J.L., Ou, S.C. et al. Ice cloud microphysics, radiative transfer and large-scale cloud processes. Meteorl. Atmos. Phys. 46, 41–50 (1991). https://doi.org/10.1007/BF01026622
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DOI: https://doi.org/10.1007/BF01026622