Larger CO2 source at the equatorial Pacific during the last deglaciation
While biogeochemical and physical processes in the Southern Ocean are thought to be central to atmospheric CO2 rise during the last deglaciation, the role of the equatorial Pacific, where the largest CO2 source exists at present, remains largely unconstrained. Here we present seawater pH and pCO2 va...
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ftpubmed:oai:pubmedcentral.nih.gov:4052749 2023-05-15T18:25:14+02:00 Larger CO2 source at the equatorial Pacific during the last deglaciation Kubota, Kaoru Yokoyama, Yusuke Ishikawa, Tsuyoshi Obrochta, Stephen Suzuki, Atsushi 2014-06-11 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4052749 http://www.ncbi.nlm.nih.gov/pubmed/24918354 https://doi.org/10.1038/srep05261 en eng Nature Publishing Group http://www.ncbi.nlm.nih.gov/pmc/articles/PMC http://www.ncbi.nlm.nih.gov/pubmed/24918354 http://dx.doi.org/10.1038/srep05261 Copyright © 2014, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ CC-BY Article Text 2014 ftpubmed https://doi.org/10.1038/srep05261 2014-06-15T00:54:07Z While biogeochemical and physical processes in the Southern Ocean are thought to be central to atmospheric CO2 rise during the last deglaciation, the role of the equatorial Pacific, where the largest CO2 source exists at present, remains largely unconstrained. Here we present seawater pH and pCO2 variations from fossil Porites corals in the mid equatorial Pacific offshore Tahiti based on a newly calibrated boron isotope paleo-pH proxy. Our new data, together with recalibrated existing data, indicate that a significant pCO2 increase (pH decrease), accompanied by anomalously large marine 14C reservoir ages, occurred following not only the Younger Dryas, but also Heinrich Stadial 1. These findings indicate an expanded zone of equatorial upwelling and resultant CO2 emission, which may be derived from higher subsurface dissolved inorganic carbon concentration. Text Southern Ocean PubMed Central (PMC) Pacific Southern Ocean Scientific Reports 4 1 |
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Article Kubota, Kaoru Yokoyama, Yusuke Ishikawa, Tsuyoshi Obrochta, Stephen Suzuki, Atsushi Larger CO2 source at the equatorial Pacific during the last deglaciation |
topic_facet |
Article |
description |
While biogeochemical and physical processes in the Southern Ocean are thought to be central to atmospheric CO2 rise during the last deglaciation, the role of the equatorial Pacific, where the largest CO2 source exists at present, remains largely unconstrained. Here we present seawater pH and pCO2 variations from fossil Porites corals in the mid equatorial Pacific offshore Tahiti based on a newly calibrated boron isotope paleo-pH proxy. Our new data, together with recalibrated existing data, indicate that a significant pCO2 increase (pH decrease), accompanied by anomalously large marine 14C reservoir ages, occurred following not only the Younger Dryas, but also Heinrich Stadial 1. These findings indicate an expanded zone of equatorial upwelling and resultant CO2 emission, which may be derived from higher subsurface dissolved inorganic carbon concentration. |
format |
Text |
author |
Kubota, Kaoru Yokoyama, Yusuke Ishikawa, Tsuyoshi Obrochta, Stephen Suzuki, Atsushi |
author_facet |
Kubota, Kaoru Yokoyama, Yusuke Ishikawa, Tsuyoshi Obrochta, Stephen Suzuki, Atsushi |
author_sort |
Kubota, Kaoru |
title |
Larger CO2 source at the equatorial Pacific during the last deglaciation |
title_short |
Larger CO2 source at the equatorial Pacific during the last deglaciation |
title_full |
Larger CO2 source at the equatorial Pacific during the last deglaciation |
title_fullStr |
Larger CO2 source at the equatorial Pacific during the last deglaciation |
title_full_unstemmed |
Larger CO2 source at the equatorial Pacific during the last deglaciation |
title_sort |
larger co2 source at the equatorial pacific during the last deglaciation |
publisher |
Nature Publishing Group |
publishDate |
2014 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4052749 http://www.ncbi.nlm.nih.gov/pubmed/24918354 https://doi.org/10.1038/srep05261 |
geographic |
Pacific Southern Ocean |
geographic_facet |
Pacific Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC http://www.ncbi.nlm.nih.gov/pubmed/24918354 http://dx.doi.org/10.1038/srep05261 |
op_rights |
Copyright © 2014, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
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CC-BY |
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https://doi.org/10.1038/srep05261 |
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Scientific Reports |
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4 |
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1 |
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