| Autor: | Klovo , Aleksandr G., Timoshenko , Dmitry V., Svidelsky , Sergey S., Kupovykh , Gennady V. |
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| Jazyk: | ruština |
| Rok vydání: | 2018 |
| Předmět: | |
| DOI: | 10.23683/0321-3005-2018-2-84-89 |
| Popis: | The article describes an electrodynamic model of the horizontally homogeneous turbulent surface atmosphere in the presence of monodisperse aerosol particles. The mathematical model includes nonstationary ionization-recombination transport equations due to the electric field and turbulent diffusion of polar light ions (air ions), in-cluding terms describing their interaction with aerosol particles and also the stationary Poisson equation with al-lowance for the formed heavy ions. It is assumed that the equilibrium condition for heavy ions is satisfied, and their transfer is not taken into account. Analysis of the system of equations makes it possible to estimate the time of estab-lishment of a stationary electrodynamic state, which varies from 100 to several tens of seconds with an increase in the concentrations of aerosol particles in the atmosphere from 5·109 to 5·1010 m-3. The characteristic height of the elec-trode layer varies from several tens of centimeters to several meters: it increases with increasing degree of turbulent mixing and decreases with increasing concentration of aerosol particles. To obtain stationary analytical solutions of the model equations, the following assumptions are made: the rate of ionization in the surface atmosphere is assumed to be constant; at the considered concentrations of aerosol particles, recombination of light ions can be neglected; the electric field and the coefficients of turbulent diffusion (for light and heavy ions) are constant and do not depend on altitude. Approximate analytical expressions are obtained for the vertical distribution of the concentrations of polar aero ions and the density of the space electric charge as a function of the concentration of aerosol particles, the electric field strength, and the degree of turbulent mixing. The obtained results are in good agreement with the theory of the electrode effect in the atmosphere and can be the basis for constructing a numerical model of electrodynamic processes in the surface layer. |
| Databáze: | OpenAIRE |
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