Features of accumulation and migration of technogenic radionuclides Cs-137 and Sr-90 in the tundra landscapes of the Russian Arctic (evidence from the Nes river basin, Kanin tundra)

This article presents the results of studies of the lateral and vertical distribution of technogenic radionuclides Cs-137 and Sr-90 in peat and soils of the tundra territory of the Nenets Autonomous Okrug on the example of the Nes River basin (Kanin tundra). There are high levels of pollution density of Cs-137 and Sr-90 in the territory of the studied basin in comparison with the literature data. Such anomalies are associated with the mosaic nature of the lateral distribution of radionuclides, due to the geomorphological features of the territory. The results of calculating the isotopic ratios of two radionuclides showed that the main source of pollution can be global atmospheric fallout.