Ecological Zoning of the Baikal Basin Based on the Results of Chemical Analysis of the Composition of Atmospheric Precipitation Accumulated in the Snow Cover

This research used the geostatistical analysis of snow cover samples taken in 2017–2022 Baikal basin. Groups pollution sources were identified by method empirical Bayesian kriging (ArcMap software) and mathematical data processing. The studied area was divided into fourteen districts. Geovisualization marker substances accumulated allowed for zoning according to degree anthropogenic load. It revealed that atmospheric territory from local extended tens kilometers along prevailing wind direction. maximum concentrations aerosols determined towns near settlements located on coast Lake at Selenga River mouth. industrial centers region southern basin Baikal, being affected air emissions Irkutsk agglomeration, be most susceptible pollution. middle northern basins could attributed background regions only heating natural background. main pollutants areas their distribution established. region, addition background, thermal power plants motor vehicles.