Инд. авторы:	Vosel Y.S, Belyanin D.K., Vosel S.V., Melgunov M.S., Mezina K., Shcherbov B.L
Заглавие:	Distribution of Cs-137 in lichens, mosses and pine needles along the transect from the north to the south of Western Siberia
Библ. ссылка:	Vosel Y.S, Belyanin D.K., Vosel S.V., Melgunov M.S., Mezina K., Shcherbov B.L Distribution of Cs-137 in lichens, mosses and pine needles along the transect from the north to the south of Western Siberia // Science of the Total Environment. - 2021. - Vol.789. - Art.147874. - ISSN 0048-9697. - EISSN 1879-1026.
Внешние системы:	DOI: 10.1016/j.scitotenv.2021.147874; PubMed: 34052487; WoS: 000677549900012;
Реферат:	eng: The Cs-137 content in mosses (Ilylocomium splendens), lichens (Cladonia siellaris) and the needles of the Siberian pine (Pinus sibirica) and the common pine (Pinus sylvesiris) along the transect from the north to the south of Western Siberia from N. 67.5 degrees to N. 55 degrees has been investigated. The appearance of Cs-137 here is linked to the nuclear weapon tests at Novaya Zemlya. The measurements have shown that at all sampling points south of N. 59.6 degrees there is a very sharp decrease in the Cs-137 specific activity in all components of the ecosystem (in mosses and lichens by about 20 times, and in the needles of conifers by 100 times) instead of a smooth decrease. This fact can be explained by the existence of the global atmospheric circulation consisting of three circulation cells in the Northern hemisphere. It is just around N. 60 degrees that the boundary between the Polar cell and the circulation cell of midle latitudes is drawn. At this boundary, the counter surface air flows of these cells (in our case, a contaminated flow from the north and a clean one from the south) collide and generate the upward air flows here that take Cs-137 away. In addition, there is water vapor condensation in the upward flows resulting in snowfalls, rains and thunderstorms. And with these precipitation events, large amounts of Cs-137 should have fallen out to the north of the Polar cell boundary during the Novaya Zemlya tests. The areas south around of N. 60 degrees have been supposed to remain clean, which is what is being observed. (C) 2021 Elsevier B.V. All rights reserved.
Ключевые слова:	TRANSPORT; RADIONUCLIDES; Global atmospheric circulation; Coniferous needles; Liches; Moss; 137Cs; PB-210;
Издано:	2021
Физ. характеристика:	147874