The residence time method is used to determine for each element of the area under study the concentrations of sulfur dioxide and sulfates, which on the average are recorded at the monitoring station under condition of the preliminary passage of the analyzed air masses over this area element. The calculated concentration fields reflect the degree of influence of different regions on the state of air environment; they were used for localization of the regions, responsible for pollution of air basin of the Berezinsk reserve (republic Belarus) by sulfur dioxide and sulfates. The error, arising from a limited amount of the monitoring data on the concentration field, was estimated. Since the regions with a high concentration can be considered as probable admixture sources, the calculated fields of annually mean concentrations of sulfur dioxide and sulfates were compared with ЕМЕР expert data about the spatial distribution of sulfur dioxide emission rates in 2004. The calculated distributions of concentration well agree with the ЕМЕР data. The arising discrepancies, possibly, are associated with the processes of chemical conversion of sulfur dioxide on the way from the source to the receptor station.
sulfur dioxide, sulfates, emission sources, back trajectories, method of transformation time, bootstrap method