SPATIAL DISTRIBUTION OF GEOCHEMICAL CHARACTERISTICS OF SNOW COVER WITHIN AND OUTSIDE TOMSK-SEVERSK INDUSTRIAL AGGLOMERATION
A.V. Zakharchenko1, A.A. Tigeev1, O.A. Pasko2, L.G. Kolesnichenko3, D.V. Moskovchenko4,5
1Institute of the Problems of Northern Development, Tyumen Scientific Centre SB RAS
2Agrophysical Research Institute, Grazhdansky ave. 14, St. Petersburg, 195220, Russia
3Tomsk State University, Lenina str. 36, Tomsk, 634050, Russia
4Institute of the Problems of Northern Development, Tyumen Scientific Centre SB RAS, Semakova str. 10, Tyumen, 625003, Russia
5Tyumen State University
Keywords: solid aerosols, snow, heavy metals, dust, trace elements
Abstract
The ability of snow cover to accumulate airborne substances allows to analyze spatiotemporal geochemical patterns and to detect polluted areas. Spatial features of geochemical regional distribution of dust deposited in the snow cover in areas remote from industrial centers were identified. The snow cover of Tomsk, Shegarka and Kozhevnikovo districts of the Tomsk region was chosen to be the object of the research. The observations were carried out in the period from 1995 to 2000. The measurements of melt snow filtrate included: pH, concentrations of nitrate and ammonia nitrogen, phosphorus, potassium, calcium, magnesium, sodium, chlorine, while the solid residue was analyzed for heavy metal contents (Cu, Zn, Cd, Pb, Co, Mn, Cr, Ni) using atomic absorption spectrophotometry method. The average snow cover depth is evenly distributed in the study area and varies from year to year. Contents of dust, ammonia (), phosphorus (P2O5), Mg in snow on the forest floor significantly differ (an upward bias) from areas of arable land. Ions , alkaline and alkaline-earth elements show an increasing trend (relative to the background values) near the industrial zone. The levels of siderophilic and lithophilic elements, copper and zinc increase near the industrial zone of Tomsk agglomeration. Lead shows a mosaic distribution throughout the territory. In disparate locations (Batkat village, Komarovo fens), dust and heavy metals contents in the snow cover were found to be higher relative to the background values.
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