Unique current connecting Southern and Indian Oceans identified from radium distributions
We examined the spatial variations in (226)Ra and (228)Ra (activities) concentrations from the surface to a depth of 830 m in the Indian and Southern Oceans from December 2019 to January 2020. (226)Ra concentrations at the surface increased sharply from 30° S to 60° S along a ~ 55° E transect (1.4–2...
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ftpubmed:oai:pubmedcentral.nih.gov:8810808 2023-05-15T14:00:12+02:00 Unique current connecting Southern and Indian Oceans identified from radium distributions Inoue, Mutsuo Hanaki, Shotaro Kameyama, Hiroaki Kumamoto, Yuichiro Nagao, Seiya 2022-02-02 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8810808/ https://doi.org/10.1038/s41598-022-05928-y en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8810808/ http://dx.doi.org/10.1038/s41598-022-05928-y © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . CC-BY Sci Rep Article Text 2022 ftpubmed https://doi.org/10.1038/s41598-022-05928-y 2022-02-06T02:20:45Z We examined the spatial variations in (226)Ra and (228)Ra (activities) concentrations from the surface to a depth of 830 m in the Indian and Southern Oceans from December 2019 to January 2020. (226)Ra concentrations at the surface increased sharply from 30° S to 60° S along a ~ 55° E transect (1.4–2.9 mBq/L), exhibiting small vertical variations, while (228)Ra decreased southward and became depleted in the Southern Ocean. These distributions indicated the ocean-scale northward lateral transport of (226)Ra-rich and (228)Ra-depleted currents originating from the Antarctic Circumpolar Current (ACC). (226)Ra concentrations indicated that the fractions of the ACC at depths of 0–800 m decreased from 0.95 to 0.14 between 60° S and 30° S. The ACC fractions in the subantarctic western Indian Ocean were higher than those previously reported in the eastern Indian region, indicating preferential transport of the ACC. The fractions obtained were approximately equivalent to those in the western Indian Ocean in the 1970s. This could be attributed to the minimal southward shift of the polar front due to global warming over the last 50 years. Text Antarc* Antarctic Southern Ocean PubMed Central (PMC) Antarctic Indian Southern Ocean The Antarctic Scientific Reports 12 1 |
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Article Inoue, Mutsuo Hanaki, Shotaro Kameyama, Hiroaki Kumamoto, Yuichiro Nagao, Seiya Unique current connecting Southern and Indian Oceans identified from radium distributions |
topic_facet |
Article |
description |
We examined the spatial variations in (226)Ra and (228)Ra (activities) concentrations from the surface to a depth of 830 m in the Indian and Southern Oceans from December 2019 to January 2020. (226)Ra concentrations at the surface increased sharply from 30° S to 60° S along a ~ 55° E transect (1.4–2.9 mBq/L), exhibiting small vertical variations, while (228)Ra decreased southward and became depleted in the Southern Ocean. These distributions indicated the ocean-scale northward lateral transport of (226)Ra-rich and (228)Ra-depleted currents originating from the Antarctic Circumpolar Current (ACC). (226)Ra concentrations indicated that the fractions of the ACC at depths of 0–800 m decreased from 0.95 to 0.14 between 60° S and 30° S. The ACC fractions in the subantarctic western Indian Ocean were higher than those previously reported in the eastern Indian region, indicating preferential transport of the ACC. The fractions obtained were approximately equivalent to those in the western Indian Ocean in the 1970s. This could be attributed to the minimal southward shift of the polar front due to global warming over the last 50 years. |
format |
Text |
author |
Inoue, Mutsuo Hanaki, Shotaro Kameyama, Hiroaki Kumamoto, Yuichiro Nagao, Seiya |
author_facet |
Inoue, Mutsuo Hanaki, Shotaro Kameyama, Hiroaki Kumamoto, Yuichiro Nagao, Seiya |
author_sort |
Inoue, Mutsuo |
title |
Unique current connecting Southern and Indian Oceans identified from radium distributions |
title_short |
Unique current connecting Southern and Indian Oceans identified from radium distributions |
title_full |
Unique current connecting Southern and Indian Oceans identified from radium distributions |
title_fullStr |
Unique current connecting Southern and Indian Oceans identified from radium distributions |
title_full_unstemmed |
Unique current connecting Southern and Indian Oceans identified from radium distributions |
title_sort |
unique current connecting southern and indian oceans identified from radium distributions |
publisher |
Nature Publishing Group UK |
publishDate |
2022 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8810808/ https://doi.org/10.1038/s41598-022-05928-y |
geographic |
Antarctic Indian Southern Ocean The Antarctic |
geographic_facet |
Antarctic Indian Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
Sci Rep |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8810808/ http://dx.doi.org/10.1038/s41598-022-05928-y |
op_rights |
© The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41598-022-05928-y |
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Scientific Reports |
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