Water Circulation and Marine Environment in the Antarctic Traced by Speciation of 129I and 127I

Abstract Emissions of anthropogenic 129I from human nuclear activities are now detected in the surface water of the Antarctic seas. Surface seawater samples from the Drake Passage, Bellingshausen, Amundsen, and Ross Seas were analyzed for total 129I and 127I, as well as for iodide and iodate of thes...

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Autores principales:	Shan Xing, Xiaolin Hou, Ala Aldahan, Göran Possnert, Keliang Shi, Peng Yi, Weijian Zhou
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/4b51b1a77f6646379aeea84e85b36854
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spelling	oai:doaj.org-article:4b51b1a77f6646379aeea84e85b368542021-12-02T15:05:10ZWater Circulation and Marine Environment in the Antarctic Traced by Speciation of 129I and 127I10.1038/s41598-017-07765-w2045-2322https://doaj.org/article/4b51b1a77f6646379aeea84e85b368542017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-07765-whttps://doaj.org/toc/2045-2322Abstract Emissions of anthropogenic 129I from human nuclear activities are now detected in the surface water of the Antarctic seas. Surface seawater samples from the Drake Passage, Bellingshausen, Amundsen, and Ross Seas were analyzed for total 129I and 127I, as well as for iodide and iodate of these two isotopes. The variability of 127I and 129I concentrations and their species (127I−/127IO3 −, 129I−/129IO3 −) suggest limited environmental impact where ((1.15–3.15) × 106 atoms/L for 129I concentration and (0.61–1.98) × 10−11 for 129I/127I atomic ratios are the lowest ones compared to the other oceans. The iodine distribution patterns provide useful information on surface water transport and mixing that are vital for better understanding of the Southern Oceans effects on the global climate change. The results indicate multiple spatial interactions between the Antarctic Circumpolar Current (ACC) and Antarctic Peninsula Coastal Current (APCC). These interactions happen in restricted circulation pathways that may partly relate to glacial melting and icebergs transport. Biological activity during the warm season should be one of the key factors controlling the reduction of iodate in the coastal water in the Antarctic.Shan XingXiaolin HouAla AldahanGöran PossnertKeliang ShiPeng YiWeijian ZhouNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Shan Xing Xiaolin Hou Ala Aldahan Göran Possnert Keliang Shi Peng Yi Weijian Zhou Water Circulation and Marine Environment in the Antarctic Traced by Speciation of 129I and 127I
description	Abstract Emissions of anthropogenic 129I from human nuclear activities are now detected in the surface water of the Antarctic seas. Surface seawater samples from the Drake Passage, Bellingshausen, Amundsen, and Ross Seas were analyzed for total 129I and 127I, as well as for iodide and iodate of these two isotopes. The variability of 127I and 129I concentrations and their species (127I−/127IO3 −, 129I−/129IO3 −) suggest limited environmental impact where ((1.15–3.15) × 106 atoms/L for 129I concentration and (0.61–1.98) × 10−11 for 129I/127I atomic ratios are the lowest ones compared to the other oceans. The iodine distribution patterns provide useful information on surface water transport and mixing that are vital for better understanding of the Southern Oceans effects on the global climate change. The results indicate multiple spatial interactions between the Antarctic Circumpolar Current (ACC) and Antarctic Peninsula Coastal Current (APCC). These interactions happen in restricted circulation pathways that may partly relate to glacial melting and icebergs transport. Biological activity during the warm season should be one of the key factors controlling the reduction of iodate in the coastal water in the Antarctic.
format	article
author	Shan Xing Xiaolin Hou Ala Aldahan Göran Possnert Keliang Shi Peng Yi Weijian Zhou
author_facet	Shan Xing Xiaolin Hou Ala Aldahan Göran Possnert Keliang Shi Peng Yi Weijian Zhou
author_sort	Shan Xing
title	Water Circulation and Marine Environment in the Antarctic Traced by Speciation of 129I and 127I
title_short	Water Circulation and Marine Environment in the Antarctic Traced by Speciation of 129I and 127I
title_full	Water Circulation and Marine Environment in the Antarctic Traced by Speciation of 129I and 127I
title_fullStr	Water Circulation and Marine Environment in the Antarctic Traced by Speciation of 129I and 127I
title_full_unstemmed	Water Circulation and Marine Environment in the Antarctic Traced by Speciation of 129I and 127I
title_sort	water circulation and marine environment in the antarctic traced by speciation of 129i and 127i
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/4b51b1a77f6646379aeea84e85b36854
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Water Circulation and Marine Environment in the Antarctic Traced by Speciation of 129I and 127I

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