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Open AccessArticle

Investigations on the Influence of Chemical Compounds on Fog Microphysical Parameters

1
Georgi Nadjakov Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd., 1784 Sofia, Bulgaria
2
Meteorological Research Division, Environment and Climate Change Canada, Toronto, ON M3H5T4, Canada
3
Faculty of Engineering and Applied Science, Ontario Tech University, Oshawa, ON L1G0C5, Canada
*
Author to whom correspondence should be addressed.
Atmosphere 2020, 11(3), 225; https://doi.org/10.3390/atmos11030225
Received: 19 January 2020 / Revised: 21 February 2020 / Accepted: 24 February 2020 / Published: 26 February 2020
(This article belongs to the Special Issue Observation, Simulation and Predictability of Fog )
Lab experiments related to artificial fog studies are limited due to instrument sensitivity to small fog and aerosol particles; therefore, the goal of this work is to evaluate aerosol solute effects on fog physical properties in a lab environment. To reach the goal, an automated fog-generating system was designed and that includes controlled chemical compounds dissolved in pure water. In the analysis, the impact of changing the mass concentration of potassium dihydrogen phosphate—KH2PO4, urea-CO(NH2)2, and potassium hexacyanoferrate trihydrate-K3(Fe(CN)6) on fog droplet size spectra is studied, because visibility is directly related to fog droplet spectra and aerosol composition. In the experiment, various microphysical conditions, including fog droplet size and volume concentration, were analyzed as a function of changing aerosol composition/spectra and fixed thermodynamic conditions. The results showed that fog droplet size spectra vary with the addition of chemical impurities to the pure water volume. For example, increasing KH2PO4 concentration compared to distilled water volume resulted in a higher mean particle size, which led to faster droplet settlement, and that resulted in cleaning air more efficiently compared to pure water fog. Overall, both issues and challenges of the experimental fog generating system with respect to water and aerosol solutions resembling CRBN (chemical, radiological, biological, and nuclear agents) characteristics are provided and evaluated. View Full-Text
Keywords: fog; visibility; physical parameters; chemical compounds; aerosols fog; visibility; physical parameters; chemical compounds; aerosols
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MDPI and ACS Style

Ivanov, O.; Todorov, P.; Gultepe, I. Investigations on the Influence of Chemical Compounds on Fog Microphysical Parameters. Atmosphere 2020, 11, 225.

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