Assessment of the influence of calm conditions on benz(a)pyrene pollution of the atmosphere of the city of Chita
V.F. Raputa1, A.A. Lezhenin1, T.V. Yaroslavtseva2,3
1Institute of Computational Mathematics and Mathematical Geophysics of the Siberian Branch of the RAS, Novosibirsk, Russia
2Matrosov Institute for System Dynamics and Control Theory of Siberian Branch of Russian Academy of Sciences, Irkutsk, Russia
3Novosibirsk Scientific Research Institute of Hygiene of the Federal Service for Supervision of Consumer Rights Protection and Human Welfare, Novosibirsk, Russia
Keywords: atmosphere, pollution, benzo(a)pyrene, observation post, monitoring, frequency of calms
Abstract
The quality of atmospheric air in many cities of Siberia is unsatisfactory, which requires research to identify the cause-and-effect relationships between natural factors and the degree of anthropogenic impacts. The article studies long-term air pollution processes in Chita and the influence of calm conditions on them. Linear correlations between the measurements of monthly average concentrations of benzo(a)pyrene at Roshydromet stationary monitoring posts winters 2020/21 and 2023/24 are analyzed. It is shown that the paired measurements at posts, in general, are proportional to each other. The relationships between benz(a)pyrene concentrations and calm conditions are investigated. A dependence of its high concentrations on the frequency of calm periods in winter has been revealed. The established statistical relationships create opportunities for external control of observation results at stationary monitoring posts in the city and for assessing the effectiveness of measures taken to improve the quality of atmospheric air. The derived dependencies also allow numerically filling gaps in observation data and identifying additional emissions from benz(a)pyrene sources.
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