Abstract

The present paper investigates the transport, formation and dynamics of atmospheric sulfate particles under different meteorological conditions from point sources. Emissions of SO2 from one and multiple local point sources were modeled. The advection and diffusion of gaseous and particulate matter are described by the atmospheric diffusion equation which is solved numerically using a new developed 3-dimensional model. The evolution of the aerosol size distribution with time was described using the aerosol general dynamic equation. Under fog conditions aqueous phase oxidation is the primary mechanism for sulfate formation. The condensation mechanism from the vapor to liquid phase is the dominant process for sulfate production at moderate relative humidities. The observed mass size distribution of sulfate suggests that the major contribution in the mass size distribution during continental conditions is from long range transport.

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