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On the efficiency with which aerosol particles of radius less than 1 μm are collected by columnar ice crystals

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Abstract

A theoretical model is presented which allows computing the efficiency with which aerosol particles of 0.001 ≤r≤1 μm are collected by columnar ice crystals in air of various relative humidities, temperatures, and pressures. Particle capture due to Brownian diffusion, thermo- and diffusiophoresis is considered. It is shown that phoretic effects importantly determine the particle capture process of 0.01≤r≤1 μm. The various pressure-temperature levels studied are found to affect the collection efficiency only ifr>0.1 μm. Comparison shows that water drops generally are better aerosol particle scavengers than columnar ice crystals.

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Authors and Affiliations

  1. Department of Atmospheric Sciences, University of California, Los Angeles

    P. K. Wang & H. R. Pruppacher

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  1. P. K. Wang
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  2. H. R. Pruppacher
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Wang, P.K., Pruppacher, H.R. On the efficiency with which aerosol particles of radius less than 1 μm are collected by columnar ice crystals. PAGEOPH 118, 1090–1108 (1980). https://doi.org/10.1007/BF01593052

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  • DOI: https://doi.org/10.1007/BF01593052

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