Past summer upwelling events in the Gulf of Oman derived from a coral geochemical record

We used a high-resolution oxygen isotope (δ(18)O(coral)), carbon isotope (δ(13)C(coral)) and Sr/Ca ratios measured in the skeleton of a reef-building coral, Porites sp., to reveal seasonal-scale upwelling events and their interannual variability in the Gulf of Oman. Our δ(13)C(coral) record shows sh...

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Autores principales: Watanabe, Takaaki K., Watanabe, Tsuyoshi, Yamazaki, Atsuko, Pfeiffer, Miriam, Garbe-Schönberg, Dieter, Claereboudt, Michel R.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5496871/
https://www.ncbi.nlm.nih.gov/pubmed/28676643
http://dx.doi.org/10.1038/s41598-017-04865-5
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author Watanabe, Takaaki K.
Watanabe, Tsuyoshi
Yamazaki, Atsuko
Pfeiffer, Miriam
Garbe-Schönberg, Dieter
Claereboudt, Michel R.
author_facet Watanabe, Takaaki K.
Watanabe, Tsuyoshi
Yamazaki, Atsuko
Pfeiffer, Miriam
Garbe-Schönberg, Dieter
Claereboudt, Michel R.
author_sort Watanabe, Takaaki K.
collection PubMed
description We used a high-resolution oxygen isotope (δ(18)O(coral)), carbon isotope (δ(13)C(coral)) and Sr/Ca ratios measured in the skeleton of a reef-building coral, Porites sp., to reveal seasonal-scale upwelling events and their interannual variability in the Gulf of Oman. Our δ(13)C(coral) record shows sharp negative excursions in the summer, which correlate with known upwelling events. Using δ(13)C(coral) anomalies as a proxy for upwelling, we found 17 summer upwelling events occurred in the last 26 years. These anomalous negative excursions of δ(13)C(coral) result from upwelled water depleted in (13)C (dissolved inorganic carbon) and decreased water-column transparency. We reconstructed biweekly SSTs from coral Sr/Ca ratios and the oxygen isotopic composition of seawater (δ(18)O(SW)) by subtracting the reconstructed Sr/Ca-SST from δ(18)O(coral). Significant δ(18)O(SW) anomalies occur during major upwelling events. Our results suggest δ(13)C(coral) anomalies can be used as a proxy for seasonal upwelling intensity in the Gulf of Oman, which, driven by the Indian/Arabian Summer Monsoon, is subject to interannual variability.
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spelling pubmed-54968712017-07-10 Past summer upwelling events in the Gulf of Oman derived from a coral geochemical record Watanabe, Takaaki K. Watanabe, Tsuyoshi Yamazaki, Atsuko Pfeiffer, Miriam Garbe-Schönberg, Dieter Claereboudt, Michel R. Sci Rep Article We used a high-resolution oxygen isotope (δ(18)O(coral)), carbon isotope (δ(13)C(coral)) and Sr/Ca ratios measured in the skeleton of a reef-building coral, Porites sp., to reveal seasonal-scale upwelling events and their interannual variability in the Gulf of Oman. Our δ(13)C(coral) record shows sharp negative excursions in the summer, which correlate with known upwelling events. Using δ(13)C(coral) anomalies as a proxy for upwelling, we found 17 summer upwelling events occurred in the last 26 years. These anomalous negative excursions of δ(13)C(coral) result from upwelled water depleted in (13)C (dissolved inorganic carbon) and decreased water-column transparency. We reconstructed biweekly SSTs from coral Sr/Ca ratios and the oxygen isotopic composition of seawater (δ(18)O(SW)) by subtracting the reconstructed Sr/Ca-SST from δ(18)O(coral). Significant δ(18)O(SW) anomalies occur during major upwelling events. Our results suggest δ(13)C(coral) anomalies can be used as a proxy for seasonal upwelling intensity in the Gulf of Oman, which, driven by the Indian/Arabian Summer Monsoon, is subject to interannual variability. Nature Publishing Group UK 2017-07-04 /pmc/articles/PMC5496871/ /pubmed/28676643 http://dx.doi.org/10.1038/s41598-017-04865-5 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
Watanabe, Takaaki K.
Watanabe, Tsuyoshi
Yamazaki, Atsuko
Pfeiffer, Miriam
Garbe-Schönberg, Dieter
Claereboudt, Michel R.
Past summer upwelling events in the Gulf of Oman derived from a coral geochemical record
title Past summer upwelling events in the Gulf of Oman derived from a coral geochemical record
title_full Past summer upwelling events in the Gulf of Oman derived from a coral geochemical record
title_fullStr Past summer upwelling events in the Gulf of Oman derived from a coral geochemical record
title_full_unstemmed Past summer upwelling events in the Gulf of Oman derived from a coral geochemical record
title_short Past summer upwelling events in the Gulf of Oman derived from a coral geochemical record
title_sort past summer upwelling events in the gulf of oman derived from a coral geochemical record
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5496871/
https://www.ncbi.nlm.nih.gov/pubmed/28676643
http://dx.doi.org/10.1038/s41598-017-04865-5
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