Daily Variability of Concentrations of Air Pollutants in the Main Seasons of the Year in Vladivostok
DOI:
https://doi.org/10.17308/geo/1609-0683/2023/2/112-121Keywords:
atmospheric pollution, daily and day-to-day course of concentrations, main pollutants, satellite monitoring, VladivostokAbstract
The purpose of the work is the day-to-day and intra-day distribution of the main pollutants in the atmosphere of Vladivostok in the winter and summer seasons. Materials and methods. The average daily and mid-term concentrations of pollutants in the atmosphere of Vladivostok city were calculated based on the formed database of eight-hour (00, 03, 06, 09, 12, 15, 18, 21 local time) satellite observations of the content of nitrogen dioxide (NO2 ) and sulfur (SO2 ), carbon monoxide (CO), fi ne particulate matter (PM2.5) in December-January and June-July of 2020-2022. Results and discussion. The study found that against the background of a small population and a relatively low industrial and production load on the environment, significant emissions of atmospheric pollutants are associated with a high concentration of road and sea transport, intensive work of seaports, as well as winter monsoon cross-border transport from emission centers from the northeastern part of China. Concentrations of nitrogen dioxide and sulfur dioxide in Vladivostok in winter exceed the values of summer indicators by three times, and carbon monoxide by 1.5-2 times. In December, January and June, air pollution with PM2.5 microparticles is at the same level, in July it decreases due to a decrease in automobile flows and their more frequent precipitation with atmospheric precipitation. Conclusion. The daily course of NO2 , SO2 and CO is characterized by increased concentrations in the evening and morning hours. For microparticles, the maximum concentration is reached in the morning, and the minimum – in the evening.
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