Influence of the wind regime on atmospheric pollution in Novosibirsk

Abstract

The actual problem of estimating long-term pollution of the atmosphere of the city according to network observations is considered, using the example of the city of Novosibirsk. To analyze the pollution processes, the results of monthly average measurements of benz(a)pyrene (BP) concentrations at stationary posts of Roshydromet in 2018 were used. A study was carried out to assess the impact of the wind regime on the levels of BP content in the atmospheric air of the city. To determine the wind characteristics, we used observational data at the meteorological station Ogurtsovo, located near the city of Novosibirsk. Taking into account the location of the dominant sources, an analysis was made of the relationships between the recurrence of wind directions and the measured levels of BP concentrations at air quality control posts in cities. The patterns of formation of atmospheric pollution from the recurrence of calm conditions in the cold period of the year have been established. It is shown that in the winter months of 2018, high concentrations of BP, reaching 15-20 MPC, were accompanied by a large number of calms. The study showed that, along with the use of integral indicators, it is necessary to pay attention to the extreme indicators of the city's atmospheric air quality for an objective picture.