Abstract
Annual needles of larch and cedar were sampled in the tundra zone of the Arctic part of Western Siberia in order to determine 7Be, 210Pb and 137Cs specific activities. Higher concentrations of 137Cs in the needles of cedar relative to the needles of larch can be associated with a clear difference in the properties of accumulation and translocation of caesium among these species. Higher concentrations of 7Be and 210Pb in the needles of larch relative to cedar needles and close isotopic ratios (7Be/210Pb) are probably due to more efficient aerosol deposition on vegetative canopies of larch.
Highlights
Landscape-geochemical processes that determine the migration flows of elements and their forms in the environment cause their regional background levels and the formation of natural and anthropogenic anomalies
The Arctic zone is significantly under a dense snow cover during each year, the atmospheric transport makes a significant contribution to the formation of a modern geochemical background of the surface landscapes of the Arctic region of Siberia
In order to estimate the factors influencing the change in the geochemical background, we will consider radioisotope indicators (7Be, 210Pb) and 137Cs
Summary
Landscape-geochemical processes that determine the migration flows of elements and their forms in the environment cause their regional background levels and the formation of natural and anthropogenic anomalies. The capture of aerosol particles, and as a result of the natural radionuclides, by the needles of larch and cedar may be different. In our study we consider the features of the 7Be, 210Pb and 137Cs contents in the annual needles of larch and cedar sampled in October 2018 on the Novy Urengoy city area, the Arctic part of Western Siberia.
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