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

Abstract We used a high-resolution oxygen isotope (δ18Ocoral), carbon isotope (δ13Ccoral) 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 δ13Ccoral record shows sharp...

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Autores principales:	Takaaki K. Watanabe, Tsuyoshi Watanabe, Atsuko Yamazaki, Miriam Pfeiffer, Dieter Garbe-Schönberg, Michel R. Claereboudt
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/7808759d9bb24181b8a6911f285921c5
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spelling	oai:doaj.org-article:7808759d9bb24181b8a6911f285921c52021-12-02T12:31:51ZPast summer upwelling events in the Gulf of Oman derived from a coral geochemical record10.1038/s41598-017-04865-52045-2322https://doaj.org/article/7808759d9bb24181b8a6911f285921c52017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-04865-5https://doaj.org/toc/2045-2322Abstract We used a high-resolution oxygen isotope (δ18Ocoral), carbon isotope (δ13Ccoral) 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 δ13Ccoral record shows sharp negative excursions in the summer, which correlate with known upwelling events. Using δ13Ccoral anomalies as a proxy for upwelling, we found 17 summer upwelling events occurred in the last 26 years. These anomalous negative excursions of δ13Ccoral result from upwelled water depleted in 13C (dissolved inorganic carbon) and decreased water-column transparency. We reconstructed biweekly SSTs from coral Sr/Ca ratios and the oxygen isotopic composition of seawater (δ18OSW) by subtracting the reconstructed Sr/Ca-SST from δ18Ocoral. Significant δ18OSW anomalies occur during major upwelling events. Our results suggest δ13Ccoral 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.Takaaki K. WatanabeTsuyoshi WatanabeAtsuko YamazakiMiriam PfeifferDieter Garbe-SchönbergMichel R. ClaereboudtNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Takaaki K. Watanabe Tsuyoshi Watanabe Atsuko Yamazaki Miriam Pfeiffer Dieter Garbe-Schönberg Michel R. Claereboudt Past summer upwelling events in the Gulf of Oman derived from a coral geochemical record
description	Abstract We used a high-resolution oxygen isotope (δ18Ocoral), carbon isotope (δ13Ccoral) 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 δ13Ccoral record shows sharp negative excursions in the summer, which correlate with known upwelling events. Using δ13Ccoral anomalies as a proxy for upwelling, we found 17 summer upwelling events occurred in the last 26 years. These anomalous negative excursions of δ13Ccoral result from upwelled water depleted in 13C (dissolved inorganic carbon) and decreased water-column transparency. We reconstructed biweekly SSTs from coral Sr/Ca ratios and the oxygen isotopic composition of seawater (δ18OSW) by subtracting the reconstructed Sr/Ca-SST from δ18Ocoral. Significant δ18OSW anomalies occur during major upwelling events. Our results suggest δ13Ccoral 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.
format	article
author	Takaaki K. Watanabe Tsuyoshi Watanabe Atsuko Yamazaki Miriam Pfeiffer Dieter Garbe-Schönberg Michel R. Claereboudt
author_facet	Takaaki K. Watanabe Tsuyoshi Watanabe Atsuko Yamazaki Miriam Pfeiffer Dieter Garbe-Schönberg Michel R. Claereboudt
author_sort	Takaaki K. Watanabe
title	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_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_sort	past summer upwelling events in the gulf of oman derived from a coral geochemical record
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/7808759d9bb24181b8a6911f285921c5
work_keys_str_mv	AT takaakikwatanabe pastsummerupwellingeventsinthegulfofomanderivedfromacoralgeochemicalrecord AT tsuyoshiwatanabe pastsummerupwellingeventsinthegulfofomanderivedfromacoralgeochemicalrecord AT atsukoyamazaki pastsummerupwellingeventsinthegulfofomanderivedfromacoralgeochemicalrecord AT miriampfeiffer pastsummerupwellingeventsinthegulfofomanderivedfromacoralgeochemicalrecord AT dietergarbeschonberg pastsummerupwellingeventsinthegulfofomanderivedfromacoralgeochemicalrecord AT michelrclaereboudt pastsummerupwellingeventsinthegulfofomanderivedfromacoralgeochemicalrecord
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Past summer upwelling events in the Gulf of Oman derived from a coral geochemical record

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