UDC 532.582.7
The paper presents the results of an analysis of the seasonal and spatial variability of mass concentrations of PM2.5 and PM10 in the surface layer of the Baikal natural territory based on automatic monitoring data from six observation sites. It is shown that the spatial distribution of suspended particle concentrations reveals a clear trend towards a decrease with increasing distance from major industrial centers. The analysis of the seasonal dynamics of PMx allowed us to identify three types of seasonal patterns, reflecting the different contributions of local, regional, and natural sources of atmospheric pollution. Irkutsk has a pronounced winter maximum, while Patron and Listvyanka have a bimodal distribution with winter and summer maxima, while Tankhoi, Buguldeika, and Davsha have a summer increase in concentrations. The lowest levels of PM2.5 and PM10 were recorded in Davsha, which suggests that this site is close to background conditions.
atmospheric pollution, particulate matter, Baikal natural territory, automatic monitoring
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