ИСТИНА

The research screening analysis was performed for data on pollutant concentrations received during regular moss monitoring survey in 2016 by Russian ICP-Vegetation team. The region of this study was correspondent mainly the territory covered by atmospheric measurements of different background monitoring networks (IBMoN and EMEP), however, the most of sampling points are placed at the areas of central and northern Russia. During the screening of data we had divided sampling points into ranges of three groups based on the values of heavy metal concentrations. Spatial distribution of ranged data demonstrates a clear growing of concentrations from north to south. Also one undistributed point (exception) was found with extremely high concentrations of pollutants - Voronezh Biosphere reserve. To estimate the roles of natural and anthropogenic sources in the formation of the sample composition, the enrichment factors (EF) were calculated for element in mosses relatively to the average abundance of chemical elements in the earth's crust. For the seven elements EFs show the lithogenic character of pollution; ones of two elements indicate mixed sources - lithogenic and anthropogenic. Based on the results of calculations an assumption could be made on anthropogenic nature of remaining elements determined in mosses. We present also the preliminary results of comparison between atmospheric deposition of some metals and their concentrations in mosses for the most areas of survey territory of this study.