Аннотация:Assessments of air quality in industrial cities are receiving much attention, especially in regionssensitive to the ecological and climate changes. The atmospheric aerosol loading was studied in the city ofNovy Urengoy during the summer–autumn of 2023. Particle number concentration and the mass concentrationof particles with a size less than 10 μm (PM10) and 2.5 μm (PM2.5), as well as black carbon (BC), were mea-sured by the mobile Aerosol Complex. The portion of fossil fuel combustion (FF%) and biomass burning (BB%)was estimated using the aethalometer model. BC concentrations increased during pollution episodesrecorded at the end of June (I) and July (II) and, in the beginning of August (III) and September (IV), dou-bled on average in comparison with the level of urban emissions. During episode IV of maximum pollution,the ВС concentration and its impact on PM2.5 increased 4 and 5 times, respectively. At that time, the portionof fossil fuel combustion FF% approached 96%. Cluster analyses of ВС dependence on the wind speed anddirection revealed the sector of high concentration source. FF% indicated the direction of the emissions fromthe biggest industrial enterprise of the Urengoy oil and gas condensate field. Wildfire plume was identified byВВ% from the south of Siberia.
