On the Influence of Atmospheric Ions on Aerosol Formation: Numerical Modeling

A. E. Aloyan; Алоян А. Е.; A. N. Yermakov; Ермаков А. Н.; V. O. Arutyunyan; Арутюнян В. О.

doi:10.31857/S000235152304003X

On the Influence of Atmospheric Ions on Aerosol Formation: Numerical Modeling

Authors: Aloyan A.E.¹, Yermakov A.N.², Arutyunyan V.O.¹
Affiliations:
1. Marchuk Institute of Numerical Mathematics, Russian Academy of Sciences
2. Institute of Energy Problems of Chemical Physics, Russian Academy of Sciences
Issue: Vol 59, No 4 (2023)
Pages: 467-473
Section: Articles
URL: https://journals.rcsi.science/0002-3515/article/view/136934
DOI: https://doi.org/10.31857/S000235152304003X
EDN: https://elibrary.ru/YMVGXF
ID: 136934

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Abstract
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Abstract

A new mathematical model of the global transport of multicomponent gas impurities and aerosols has been constructed, including the formation of sulfate aerosols in the atmosphere in both hemispheres. Calculations of the nucleation rates and particle number concentrations were performed for the winter period in the troposphere using a unified model that takes into account chemical and kinetic transformation processes (photochemistry, nucleation, condensation/evaporation, and coagulation). Binary nucleation of sulfuric acid and water vapor was coupled with new-particle formation due to atmospheric ions. The numerical results indicate a significant role of ion nucleation in aerosol formation in the Northern and Southern hemispheres in winter. The factors controlling the dynamics of ionic processes in the atmosphere and their influence on the spatiotemporal distribution of aerosol particles involve not only the level of air ionization but also temperature, relative humidity, and the content of sulfur and water vapor in the air. At a height of 4.2 km, the formation of particle nuclei with the participation of ions occurs only over the Lake Baikal and Kamchatka regions as well as the regions of the northeast and northwest of the American continent. Within the regions of localization of this process in the atmosphere, the rate of new particle generation varies by more than an order of magnitude.

Keywords

numerical model, atmosphere, aerosol, ion nucleation, binary nucleation

References

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