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Precipitation scavenging coefficient: Influence of measured aerosol and raindrop size distributions

TitlePrecipitation scavenging coefficient: Influence of measured aerosol and raindrop size distributions
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2000
AuthorsMircea, Mihaela, Stefan S., and Fuzzi S.
JournalAtmospheric Environment
Keywordsaerosol, cloud microphysics, conference paper, controlled study, diffusion, dispersion, linear system, mathematical model, measurement, particle size, Physical phenomena, Pollution, precipitation, priority journal, Rain, raindrop, scavenging, scavenging system, Size distribution

Precipitation scavenging coefficients, widely used in pollution studies, are derived from microphysical parameterisations of aerosol particles and raindrop populations and parameterisations of their interactions. The present study investigates the effects of measured aerosol and raindrop size distributions in a microphysical polydisperse framework. The interactions between aerosol and raindrops parameterised as collision efficiency are explicitly included to account for Brownian diffusion, inertial impaction and interception. Estimated values of the polydisperse scavenging coefficients exhibit variations of orders of magnitude depending on the aerosol type and almost no variation with the raindrop size distributions. For practical use, linear relationships between the scavenging coefficients and rain intensity for different aerosol types are derived. Copyright (C) 2000 Elsevier Science Ltd.


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Citation KeyMircea20005169