Aerosol dry deposition in the urban environment: Assessment of deposition velocity on building facades

• Published in: Journal of aerosol science Vol. 69; pp. 113 - 131
• Main Authors: Maro, D., Connan, O., Flori, J.P., Hébert, D., Mestayer, P., Olive, F., Rosant, J.M., Rozet, M., Sini, J.F., Solier, L.
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.03.2014; Elsevier
• Subjects: Aerosol; Aerosols; Applied sciences; Atmospheric pollution; Building facades; Chemistry; Colloidal state and disperse state; Deposition velocity; Exact sciences and technology; Fluid mechanics; General and physical chemistry; Mechanics; Physics; Pollution; Tracers; Urban atmosphere; Deposition velocity; Aerosol; Urban atmosphere; Building facades; Tracers; Buildings; Aerosols; Aerosol deposition; Dry deposition; Velocity
• ISSN: 0021-8502; 1879-1964
• DOI: 10.1016/j.jaerosci.2013.12.001

Deposition velocities of aerosol on building and monument vertical surfaces have scarcely been documented and modeled so far. A methodology is proposed based on simultaneous measurements of artificial aerosol tracer fluorescein emissions, concentrations and depositions, and of high frequency turbulent variables. The results are compared to year-long deposition of 7Be, a naturally produced airborne radioactive particle tracer. A three-dimensional simulation of the turbulent flow and concentration fields in the vicinity of the wall specifies the flow structure responsible for deposition on the facade. It also allows comparison of the measured fluorescein deposition velocities with two semi-empirical models. •Measurements of dry deposition on building and monument vertical surfaces.•Measurements of dry deposition using fluorescein and natural 7Be radionuclide.•Comparison of the measured deposition velocities with two semi-empirical models.