Climatic conditions and supersaturation in the airways as a new factor for enhanced deposition of ambient aerosols: a pilot study

Alexander N. Ishmatov

doi:10.1117/12.2540620

18 December 2019 Climatic conditions and supersaturation in the airways as a new factor for enhanced deposition of ambient aerosols: a pilot study

Alexander N. Ishmatov

Author Affiliations +

Proceedings Volume 11208, 25th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 112087H (2019) https://doi.org/10.1117/12.2540620
Event: XXV International Symposium, Atmospheric and Ocean Optics, Atmospheric Physics, 2019, Novosibirsk, Russian Federation

Abstract

In this study, the hypothesis that the human airways can serve like a wet-walled growth tube in the water-based condensation particle counters , and some environmental conditions can induce supersaturation and enhanced condensational growth of fine and ultrafine ambient aerosols and particulate matter during the first s tage of inhalation. The first preliminary estimations and calculations in this study have shown that the boundary conditions for increased supersaturation in airways have the following values: inhalation of cold air of T<22°C or cool, saturated air of T<25°C; and the ambient relative humidity (RH) is increased for a fixed ambient temperature, or; the ambient temperature is decreased for a fixed ambient RH. The preliminary results of the study show that supersaturation in airways can significantly change the pattern of human exposure to air pollution, ultrafine and submicron aerosols, and particulates. It was found that at least a possibility of activation of condensational growth for hygroscopic particles above 10nm and nonhygroscopic particles above 20nm can exist under supersaturated conditions in airways. Future investigations are needed.

Citation Download Citation

Alexander N. Ishmatov "Climatic conditions and supersaturation in the airways as a new factor for enhanced deposition of ambient aerosols: a pilot study", Proc. SPIE 11208, 25th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 112087H (18 December 2019); https://doi.org/10.1117/12.2540620

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