The parameterization of microphysical processes for atmospherical numerical models

Drofa, O. V. (2003) The parameterization of microphysical processes for atmospherical numerical models. Il nuovo cimento C, 26 (3). pp. 233-262. ISSN 1826-9885

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Thispap er presentsa parametrization of microphysical cloud and precipitation processes set up for application in atmospheric numerical models. The parametrization includes the approximation of processes regarding the formation and the evolution of atmospheric condensate in both the liquid and solid phase. The algorithm is based on the entropy conservation law for a closed thermodynamic system that includes water vapour, cloud water, cloud ice, liquid and solid hydrometeors. Some original methods of cloud evolution approximation are used in the scheme; in particular a more accurate method of parametrization of hydrometeor evaporation and sublimation is applied. The presented parametrization is tested in two different atmospheric numerical models. The first model is a two-dimensional, non-hydrostatic cumulonimbus model; and the second one is the mesoscale hydrostatic model BOLAM. With the cumulonimbus model the parametrization verification is performed on the basis of the observations; the comparison with other microphysical schemes is also made. The analysis of the cumulonimbus life cycle, and the role played by microphysical processes in cloud and precipitation evolution, is presented. With the BOLAM model, the comparison between the present microphysical scheme and the one based on a more simplified microphysical parameterization is performed.

Item Type: Article
Uncontrolled Keywords: Weather analysis and prediction ; Water in the atmosphere (humidity, clouds, evaporation, precipitation)
Subjects: 500 Scienze naturali e Matematica > 550 Scienze della Terra > 551 Geologia, Idrologia, Meteorologia
Depositing User: Marina Spanti
Date Deposited: 13 Mar 2020 13:58
Last Modified: 13 Mar 2020 13:58

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