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

Emissions of anthropogenic (129)I 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 (129)I and (127)I, as well as for iodide and iodate of these t...

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Autores principales: Xing, Shan, Hou, Xiaolin, Aldahan, Ala, Possnert, Göran, Shi, Keliang, Yi, Peng, Zhou, Weijian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5552787/
https://www.ncbi.nlm.nih.gov/pubmed/28798296
http://dx.doi.org/10.1038/s41598-017-07765-w
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author Xing, Shan
Hou, Xiaolin
Aldahan, Ala
Possnert, Göran
Shi, Keliang
Yi, Peng
Zhou, Weijian
author_facet Xing, Shan
Hou, Xiaolin
Aldahan, Ala
Possnert, Göran
Shi, Keliang
Yi, Peng
Zhou, Weijian
author_sort Xing, Shan
collection PubMed
description Emissions of anthropogenic (129)I 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 (129)I and (127)I, as well as for iodide and iodate of these two isotopes. The variability of (127)I and (129)I concentrations and their species ((127)I(−)/(127)IO(3) (−), (129)I(−)/(129)IO(3) (−)) suggest limited environmental impact where ((1.15–3.15) × 10(6) atoms/L for (129)I concentration and (0.61–1.98) × 10(−11) for (129)I/(127)I 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.
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spelling pubmed-55527872017-08-14 Water Circulation and Marine Environment in the Antarctic Traced by Speciation of (129)I and (127)I Xing, Shan Hou, Xiaolin Aldahan, Ala Possnert, Göran Shi, Keliang Yi, Peng Zhou, Weijian Sci Rep Article Emissions of anthropogenic (129)I 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 (129)I and (127)I, as well as for iodide and iodate of these two isotopes. The variability of (127)I and (129)I concentrations and their species ((127)I(−)/(127)IO(3) (−), (129)I(−)/(129)IO(3) (−)) suggest limited environmental impact where ((1.15–3.15) × 10(6) atoms/L for (129)I concentration and (0.61–1.98) × 10(−11) for (129)I/(127)I 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. Nature Publishing Group UK 2017-08-10 /pmc/articles/PMC5552787/ /pubmed/28798296 http://dx.doi.org/10.1038/s41598-017-07765-w Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Xing, Shan
Hou, Xiaolin
Aldahan, Ala
Possnert, Göran
Shi, Keliang
Yi, Peng
Zhou, Weijian
Water Circulation and Marine Environment in the Antarctic Traced by Speciation of (129)I and (127)I
title Water Circulation and Marine Environment in the Antarctic Traced by Speciation of (129)I and (127)I
title_full Water Circulation and Marine Environment in the Antarctic Traced by Speciation of (129)I and (127)I
title_fullStr Water Circulation and Marine Environment in the Antarctic Traced by Speciation of (129)I and (127)I
title_full_unstemmed Water Circulation and Marine Environment in the Antarctic Traced by Speciation of (129)I and (127)I
title_short Water Circulation and Marine Environment in the Antarctic Traced by Speciation of (129)I and (127)I
title_sort water circulation and marine environment in the antarctic traced by speciation of (129)i and (127)i
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5552787/
https://www.ncbi.nlm.nih.gov/pubmed/28798296
http://dx.doi.org/10.1038/s41598-017-07765-w
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