Articles | Volume 21, issue 24
Atmos. Chem. Phys., 21, 18263–18269, 2021
https://doi.org/10.5194/acp-21-18263-2021
Atmos. Chem. Phys., 21, 18263–18269, 2021
https://doi.org/10.5194/acp-21-18263-2021

Research article 16 Dec 2021

Research article | 16 Dec 2021

Constant flux layers with gravitational settling: links to aerosols, fog and deposition velocities

Peter A. Taylor

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Subject: Aerosols | Research Activity: Atmospheric Modelling | Altitude Range: Troposphere | Science Focus: Physics (physical properties and processes)
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Cited articles

Barenblatt, G. I.: Motion of suspended particles in a turbulent flow, Prikl. Matem. Mekh., 17, 261–264, 1953. 
Brutsaert, W.: Evaporation into the Atmosphere, Reidel, Dordrecht, Holland, 299 pp., 1982. 
Calder, K. L.: A note on the constancy of horizontal turbulent shearing stress in the lower layers of the atmosphere, Q. J. Roy. Meteor. Soc., 65, 537–541, https://doi.org/10.1002/qj.49706528211, 1939. 
Csanady, G. T.: Turbulent Diffusion in the Environment, Reidel, Dordrecht, Holland, 248 pp., 1973. 
Farmer, D. K., Boedicker, E. K., and DeBolt, H. M.: Dry Deposition of Atmospheric Aerosols: Approaches, Observations, and Mechanisms, Annu. Rev. Phys. Chem., 72, 16.1–16.23, https://doi.org/10.1146/annurev-physchem-090519-034936, 2021. 
Short summary
Atmospheric aerosols including fog droplets can be deposited on the ground or on water surfaces. This is due to both gravitational settling and turbulent impaction. A simple model of this combined process is developed based on conventional atmospheric-boundary-layer ideas. The model suggests an alternative formulation for the treatment of gravitational settling in the deposition velocity estimations of aerosol particles and fog droplets.
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