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Radioactive isotopes such as 7Be, 210Pb and 137Cs are used as indicators of processes associated with the transfer of matter from the atmosphere. There are no widely known data on studies of the joint seasonal atmospheric flux of 7Be and 210Pbatm, based on the study of integrated snow samples accumulated in winter periods in territory of Western Siberia. Study of snow cover can provide information on the total flux of 7Be and 210Pb to the Earth’s surface over the entire period of snow accumulation without separation of the dry or wet components. The purpose of this study is to conduct a comparative analysis of 7Be, 210Pb and 137Cs deposition as a part of the atmospheric precipitation in the Arctic and south regions of Western Siberia in winter period. As a result of the research, data on the joint deposition of 7Be, 210Pb and 137Cs in integral snow samples, including atmospheric precipitation, dust, and aerosols, in the Arctic (for 7 months) and southern (for 5 months) regions of Western Siberia were firstly obtained. A comparative analysis of the data shows that, despite the difference in geographic location, the concentration of 7Be in the snow water of the Arctic (248.0 mBq L-1) and south (265.4 mBq L-1) regions is almost equal. At the same time, the specific activity of 210Pb in the suspended matter of snow waters sampled in the southern region is 1.6 times higher, which may indicate a much higher level of dust material intake in winter.

7 Be, 210Pb AND 137Cs IN ATMOSPHERIC deposition OF SOUTHERN AND ARCTIC REGIONS OF WESTERN SIBERIA

⁷ Be, ²¹⁰Pb AND ¹³⁷Cs IN ATMOSPHERIC deposition OF SOUTHERN AND ARCTIC REGIONS OF WESTERN SIBERIA