Studying the influence of humidification of atmospheric aerosol on visibility on roads

Abstract

Introduction: The subject of the study is the effect of humidification of aerosol on visibility on roads. When hygroscopic aerosol becomes humidified, the size of aerosol particles increases several times, which significantly impairs visibility on roads. The aim of the study is to study the effect of humidification of hygroscopic aerosol on visibility on highways. Materials and methods: A model is proposed for calculating integral visibility on a long highway, taking into account the hygroscopicity of the aerosol, i.e. the effect of humidification of the aerosol in these zones. The variational optimization method was used to perform a model-based study of total visibility along a long highway passing through geometric zones characterized by varying degrees of aerosol air pollution and relative humidity in these zones. A logarithmic measure of aerosol air pollution has been introduced for consideration, as well as an integral logarithmic measure of such pollution in both discrete and continuous representations. Findings: It is shown that the integral logarithmic measure of aerosol pollution taking into account the effect of humidification of aerosol reaches a maximum with a certain type of introduced relationship function, and at the same time, visibility on a highway reaches a minimum in the integral sense. Conclusions: It is determined that when a certain restrictive condition imposed on the integral of the introduced relationship function is satisfied, the integral logarithmic measure of aerosol pollution reaches a maximum with a certain type of the introduced relationship function, and visibility on the highway reaches a minimum, in the integral sense.