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Mathematical modelling of the atmospheric aerosol transfer with coagulation taken into account

Mathematical modelling of the atmospheric aerosol transfer with coagulation taken into account - A combined model of the atmosphere hydrothermodynamics and the pollutant transport is described. The atmospheric pollution processes are considered having regard to the aerosol coagulation. The coagulation is allowed for by the Smolukhovsky equation. To transform the equation into the form solvable numerically, we divide the mass range of particles involved in coagulation into fractions on a logarithmic scale. This allows us to describe a wide range of masses by using a small number of equations without any loss in accuracy. The coagulation kernels are taken close to reality, which allows us to take into consideration the change-over from one collision regime to another (free molecular, transition and diffuse regimes). Implementation of the numerical model and discussion of numerical experiments are presented as well. The atmospheric aerosols (small particles suspended in the air) were known for more than a hundred years, but only in the last decade their role in global atmospheric processes stimulated their thorough investigation. By now the atmospheric aerosols are known to affect the weather and climate on our planet, the radiation and energy balances of the atmosphere, the precipitation and cloud formation processes. Though the natural aerosols account for about 90% of the http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Numerical Analysis and Mathematical Modelling de Gruyter

Mathematical modelling of the atmospheric aerosol transfer with coagulation taken into account

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References (7)

Publisher
de Gruyter
Copyright
Copyright © 2009 Walter de Gruyter
ISSN
0927-6467
eISSN
1569-3988
DOI
10.1515/rnam.1993.8.1.17
Publisher site
See Article on Publisher Site

Abstract

- A combined model of the atmosphere hydrothermodynamics and the pollutant transport is described. The atmospheric pollution processes are considered having regard to the aerosol coagulation. The coagulation is allowed for by the Smolukhovsky equation. To transform the equation into the form solvable numerically, we divide the mass range of particles involved in coagulation into fractions on a logarithmic scale. This allows us to describe a wide range of masses by using a small number of equations without any loss in accuracy. The coagulation kernels are taken close to reality, which allows us to take into consideration the change-over from one collision regime to another (free molecular, transition and diffuse regimes). Implementation of the numerical model and discussion of numerical experiments are presented as well. The atmospheric aerosols (small particles suspended in the air) were known for more than a hundred years, but only in the last decade their role in global atmospheric processes stimulated their thorough investigation. By now the atmospheric aerosols are known to affect the weather and climate on our planet, the radiation and energy balances of the atmosphere, the precipitation and cloud formation processes. Though the natural aerosols account for about 90% of the

Journal

Russian Journal of Numerical Analysis and Mathematical Modellingde Gruyter

Published: Jan 1, 1993

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