Radioecological and geochemical peculiarities of cryoconite on Novaya Zemlya glaciers

Abstract In recent years, cryoconite has received growing attention from a radioecological point of view, since several studies have shown that this material is extremely efficient in accumulating natural and anthropogenic radionuclides. The Novaya Zemlya Archipelago (Russian Arctic) hosts the secon...

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Autores principales:	Alexey Miroshnikov, Mikhail Flint, Enver Asadulin, Ramiz Aliev, Andrei Shiryaev, Arsenii Kudikov, Vladimir Khvostikov
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/aaeacb6220184e1d88162d41d660298d
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spelling	oai:doaj.org-article:aaeacb6220184e1d88162d41d660298d2021-12-05T12:11:50ZRadioecological and geochemical peculiarities of cryoconite on Novaya Zemlya glaciers10.1038/s41598-021-02601-82045-2322https://doaj.org/article/aaeacb6220184e1d88162d41d660298d2021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-02601-8https://doaj.org/toc/2045-2322Abstract In recent years, cryoconite has received growing attention from a radioecological point of view, since several studies have shown that this material is extremely efficient in accumulating natural and anthropogenic radionuclides. The Novaya Zemlya Archipelago (Russian Arctic) hosts the second largest glacial system in the Arctic. From 1957 to 1962, numerous atmospheric nuclear explosions were conducted at Novaya Zemlya, but to date, very little is known about the radioecology of its ice cap. Analysis of radionuclides and other chemical elements in cryoconite holes on Nalli Glacier reveals the presence of two main zones at different altitudes that present different radiological features. The first zone is 130–210 m above sea level (a.s.l.), has low radioactivity, high concentrations of lithophile elements and a chalcophile content close to that of upper continental crust clarkes. The second zone (220–370 m a.s.l.) is characterized by high activity levels of radionuclides and “inversion” of geochemical behaviour with lower concentrations of lithophiles and higher chalcophiles. In the upper part of this zone (350–370 m a.s.l.), 137Cs activity reaches the record levels for Arctic cryoconite (5700–8100 Bq/kg). High levels of Sn, Sb, Bi and Ag, significantly exceeding those of upper continental crust clarkes, also appear here. We suggest that a buried layer of contaminated ice that formed during atmospheric nuclear tests serves as a local secondary source of radionuclide contamination. Its melting is responsible for the formation of this zone.Alexey MiroshnikovMikhail FlintEnver AsadulinRamiz AlievAndrei ShiryaevArsenii KudikovVladimir KhvostikovNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-15 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Alexey Miroshnikov Mikhail Flint Enver Asadulin Ramiz Aliev Andrei Shiryaev Arsenii Kudikov Vladimir Khvostikov Radioecological and geochemical peculiarities of cryoconite on Novaya Zemlya glaciers
description	Abstract In recent years, cryoconite has received growing attention from a radioecological point of view, since several studies have shown that this material is extremely efficient in accumulating natural and anthropogenic radionuclides. The Novaya Zemlya Archipelago (Russian Arctic) hosts the second largest glacial system in the Arctic. From 1957 to 1962, numerous atmospheric nuclear explosions were conducted at Novaya Zemlya, but to date, very little is known about the radioecology of its ice cap. Analysis of radionuclides and other chemical elements in cryoconite holes on Nalli Glacier reveals the presence of two main zones at different altitudes that present different radiological features. The first zone is 130–210 m above sea level (a.s.l.), has low radioactivity, high concentrations of lithophile elements and a chalcophile content close to that of upper continental crust clarkes. The second zone (220–370 m a.s.l.) is characterized by high activity levels of radionuclides and “inversion” of geochemical behaviour with lower concentrations of lithophiles and higher chalcophiles. In the upper part of this zone (350–370 m a.s.l.), 137Cs activity reaches the record levels for Arctic cryoconite (5700–8100 Bq/kg). High levels of Sn, Sb, Bi and Ag, significantly exceeding those of upper continental crust clarkes, also appear here. We suggest that a buried layer of contaminated ice that formed during atmospheric nuclear tests serves as a local secondary source of radionuclide contamination. Its melting is responsible for the formation of this zone.
format	article
author	Alexey Miroshnikov Mikhail Flint Enver Asadulin Ramiz Aliev Andrei Shiryaev Arsenii Kudikov Vladimir Khvostikov
author_facet	Alexey Miroshnikov Mikhail Flint Enver Asadulin Ramiz Aliev Andrei Shiryaev Arsenii Kudikov Vladimir Khvostikov
author_sort	Alexey Miroshnikov
title	Radioecological and geochemical peculiarities of cryoconite on Novaya Zemlya glaciers
title_short	Radioecological and geochemical peculiarities of cryoconite on Novaya Zemlya glaciers
title_full	Radioecological and geochemical peculiarities of cryoconite on Novaya Zemlya glaciers
title_fullStr	Radioecological and geochemical peculiarities of cryoconite on Novaya Zemlya glaciers
title_full_unstemmed	Radioecological and geochemical peculiarities of cryoconite on Novaya Zemlya glaciers
title_sort	radioecological and geochemical peculiarities of cryoconite on novaya zemlya glaciers
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/aaeacb6220184e1d88162d41d660298d
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Radioecological and geochemical peculiarities of cryoconite on Novaya Zemlya glaciers

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