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Homogeneous sulfur isotope signature in East Antarctica and implication for sulfur source shifts through the last glacial-interglacial cycle

Sulfate aerosol (SO(4)(2−)) preserved in Antarctic ice cores is discussed in the light of interactions between marine biological activity and climate since it is mainly sourced from biogenic emissions from the surface ocean and scatters solar radiation during traveling in the atmosphere. However, th...

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Autores principales: Ishino, Sakiko, Hattori, Shohei, Savarino, Joel, Legrand, Michel, Albalat, Emmanuelle, Albarede, Francis, Preunkert, Susanne, Jourdain, Bruno, Yoshida, Naohiro
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6711983/
https://www.ncbi.nlm.nih.gov/pubmed/31455786
http://dx.doi.org/10.1038/s41598-019-48801-1
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author Ishino, Sakiko
Hattori, Shohei
Savarino, Joel
Legrand, Michel
Albalat, Emmanuelle
Albarede, Francis
Preunkert, Susanne
Jourdain, Bruno
Yoshida, Naohiro
author_facet Ishino, Sakiko
Hattori, Shohei
Savarino, Joel
Legrand, Michel
Albalat, Emmanuelle
Albarede, Francis
Preunkert, Susanne
Jourdain, Bruno
Yoshida, Naohiro
author_sort Ishino, Sakiko
collection PubMed
description Sulfate aerosol (SO(4)(2−)) preserved in Antarctic ice cores is discussed in the light of interactions between marine biological activity and climate since it is mainly sourced from biogenic emissions from the surface ocean and scatters solar radiation during traveling in the atmosphere. However, there has been a paradox between the ice core record and the marine sediment record; the former shows constant non-sea-salt (nss-) SO(4)(2−) flux throughout the glacial-interglacial changes, and the latter shows a decrease in biogenic productivity during glacial periods compared to interglacial periods. Here, by ensuring the homogeneity of sulfur isotopic compositions of atmospheric nss-SO(4)(2−) (δ(34)S(nss)) over East Antarctica, we established the applicability of the signature as a robust tool for distinguishing marine biogenic and nonmarine biogenic SO(4)(2−). Our findings, in conjunction with existing records of nss-SO(4)(2−) flux and δ(34)S(nss) in Antarctic ice cores, provide an estimate of the relative importance of marine biogenic SO(4)(2−) during the last glacial period to be 48 ± 10% of nss-SO(4)(2−), slightly lower than 59 ± 11% during the interglacial periods. Thus, our results tend to reconcile the ice core and sediment records, with both suggesting the decrease in marine productivity around Southern Ocean under the cold climate.
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spelling pubmed-67119832019-09-13 Homogeneous sulfur isotope signature in East Antarctica and implication for sulfur source shifts through the last glacial-interglacial cycle Ishino, Sakiko Hattori, Shohei Savarino, Joel Legrand, Michel Albalat, Emmanuelle Albarede, Francis Preunkert, Susanne Jourdain, Bruno Yoshida, Naohiro Sci Rep Article Sulfate aerosol (SO(4)(2−)) preserved in Antarctic ice cores is discussed in the light of interactions between marine biological activity and climate since it is mainly sourced from biogenic emissions from the surface ocean and scatters solar radiation during traveling in the atmosphere. However, there has been a paradox between the ice core record and the marine sediment record; the former shows constant non-sea-salt (nss-) SO(4)(2−) flux throughout the glacial-interglacial changes, and the latter shows a decrease in biogenic productivity during glacial periods compared to interglacial periods. Here, by ensuring the homogeneity of sulfur isotopic compositions of atmospheric nss-SO(4)(2−) (δ(34)S(nss)) over East Antarctica, we established the applicability of the signature as a robust tool for distinguishing marine biogenic and nonmarine biogenic SO(4)(2−). Our findings, in conjunction with existing records of nss-SO(4)(2−) flux and δ(34)S(nss) in Antarctic ice cores, provide an estimate of the relative importance of marine biogenic SO(4)(2−) during the last glacial period to be 48 ± 10% of nss-SO(4)(2−), slightly lower than 59 ± 11% during the interglacial periods. Thus, our results tend to reconcile the ice core and sediment records, with both suggesting the decrease in marine productivity around Southern Ocean under the cold climate. Nature Publishing Group UK 2019-08-27 /pmc/articles/PMC6711983/ /pubmed/31455786 http://dx.doi.org/10.1038/s41598-019-48801-1 Text en © The Author(s) 2019 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
Ishino, Sakiko
Hattori, Shohei
Savarino, Joel
Legrand, Michel
Albalat, Emmanuelle
Albarede, Francis
Preunkert, Susanne
Jourdain, Bruno
Yoshida, Naohiro
Homogeneous sulfur isotope signature in East Antarctica and implication for sulfur source shifts through the last glacial-interglacial cycle
title Homogeneous sulfur isotope signature in East Antarctica and implication for sulfur source shifts through the last glacial-interglacial cycle
title_full Homogeneous sulfur isotope signature in East Antarctica and implication for sulfur source shifts through the last glacial-interglacial cycle
title_fullStr Homogeneous sulfur isotope signature in East Antarctica and implication for sulfur source shifts through the last glacial-interglacial cycle
title_full_unstemmed Homogeneous sulfur isotope signature in East Antarctica and implication for sulfur source shifts through the last glacial-interglacial cycle
title_short Homogeneous sulfur isotope signature in East Antarctica and implication for sulfur source shifts through the last glacial-interglacial cycle
title_sort homogeneous sulfur isotope signature in east antarctica and implication for sulfur source shifts through the last glacial-interglacial cycle
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6711983/
https://www.ncbi.nlm.nih.gov/pubmed/31455786
http://dx.doi.org/10.1038/s41598-019-48801-1
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