On the Parameterization of Evaporation of Raindrops as Simulated by a One-Dimensional Rainshaft Model
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- Axel Seifert
- Deutscher Wetterdienst, Offenbach, Germany
書誌事項
- 公開日
- 2008-11-01
- DOI
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- 10.1175/2008jas2586.1
- 公開者
- American Meteorological Society
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説明
<jats:title>Abstract</jats:title> <jats:p>The process of evaporation of raindrops below cloud base is investigated by numerical simulations using a one-dimensional rainshaft model with bin microphysics. The simulations reveal a high variability of the shape of the raindrop size distributions, which has important implications for the efficiency of evaporation below cloud base.</jats:p> <jats:p>A new parameterization of the shape of the raindrop size distribution as a function of the mean volume diameter is suggested and applied in a two-moment microphysical scheme. In addition, the effect of evaporation on the number concentration of raindrops is parameterized. A comparison of results of the revised two-moment scheme and the bin microphysics rainshaft model shows that the two-moment scheme is able to reproduce the results of the reference model in a wide parameter range.</jats:p>
収録刊行物
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- Journal of the Atmospheric Sciences
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Journal of the Atmospheric Sciences 65 (11), 3608-3619, 2008-11-01
American Meteorological Society
