Increased reservoir ages and poorly ventilated deep waters inferred in the glacial Eastern Equatorial Pacific
Consistent evidence for a poorly ventilated deep Pacific Ocean that could have released its radiocarbon-depleted carbon stock to the atmosphere during the last deglaciation has long been sought. Such evidence remains lacking, in part due to a paucity of surface reservoir age reconstructions required...
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ftpubmed:oai:pubmedcentral.nih.gov:4507014 2023-05-15T18:24:54+02:00 Increased reservoir ages and poorly ventilated deep waters inferred in the glacial Eastern Equatorial Pacific de la Fuente, Maria Skinner, Luke Calvo, Eva Pelejero, Carles Cacho, Isabel 2015-07-03 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4507014/ http://www.ncbi.nlm.nih.gov/pubmed/26137976 https://doi.org/10.1038/ncomms8420 en eng Nature Pub. Group http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4507014/ http://www.ncbi.nlm.nih.gov/pubmed/26137976 http://dx.doi.org/10.1038/ncomms8420 Copyright © 2015, Nature Publishing Group, a division of 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 to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ CC-BY Article Text 2015 ftpubmed https://doi.org/10.1038/ncomms8420 2015-07-26T00:04:10Z Consistent evidence for a poorly ventilated deep Pacific Ocean that could have released its radiocarbon-depleted carbon stock to the atmosphere during the last deglaciation has long been sought. Such evidence remains lacking, in part due to a paucity of surface reservoir age reconstructions required for accurate deep-ocean ventilation age estimates. Here we combine new radiocarbon data from the Eastern Equatorial Pacific (EEP) with chronostratigraphic calendar age constraints to estimate shallow sub-surface reservoir age variability, and thus provide estimates of deep-ocean ventilation ages. Both shallow- and deep-water ventilation ages drop across the last deglaciation, consistent with similar reconstructions from the South Pacific and Southern Ocean. The observed regional fingerprint linking the Southern Ocean and the EEP is consistent with a dominant southern source for EEP thermocline waters and suggests relatively invariant ocean interior transport pathways but significantly reduced air–sea gas exchange in the glacial southern high latitudes. Text Southern Ocean PubMed Central (PMC) Pacific Southern Ocean Nature Communications 6 1 |
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Article de la Fuente, Maria Skinner, Luke Calvo, Eva Pelejero, Carles Cacho, Isabel Increased reservoir ages and poorly ventilated deep waters inferred in the glacial Eastern Equatorial Pacific |
topic_facet |
Article |
description |
Consistent evidence for a poorly ventilated deep Pacific Ocean that could have released its radiocarbon-depleted carbon stock to the atmosphere during the last deglaciation has long been sought. Such evidence remains lacking, in part due to a paucity of surface reservoir age reconstructions required for accurate deep-ocean ventilation age estimates. Here we combine new radiocarbon data from the Eastern Equatorial Pacific (EEP) with chronostratigraphic calendar age constraints to estimate shallow sub-surface reservoir age variability, and thus provide estimates of deep-ocean ventilation ages. Both shallow- and deep-water ventilation ages drop across the last deglaciation, consistent with similar reconstructions from the South Pacific and Southern Ocean. The observed regional fingerprint linking the Southern Ocean and the EEP is consistent with a dominant southern source for EEP thermocline waters and suggests relatively invariant ocean interior transport pathways but significantly reduced air–sea gas exchange in the glacial southern high latitudes. |
format |
Text |
author |
de la Fuente, Maria Skinner, Luke Calvo, Eva Pelejero, Carles Cacho, Isabel |
author_facet |
de la Fuente, Maria Skinner, Luke Calvo, Eva Pelejero, Carles Cacho, Isabel |
author_sort |
de la Fuente, Maria |
title |
Increased reservoir ages and poorly ventilated deep waters inferred in the glacial Eastern Equatorial Pacific |
title_short |
Increased reservoir ages and poorly ventilated deep waters inferred in the glacial Eastern Equatorial Pacific |
title_full |
Increased reservoir ages and poorly ventilated deep waters inferred in the glacial Eastern Equatorial Pacific |
title_fullStr |
Increased reservoir ages and poorly ventilated deep waters inferred in the glacial Eastern Equatorial Pacific |
title_full_unstemmed |
Increased reservoir ages and poorly ventilated deep waters inferred in the glacial Eastern Equatorial Pacific |
title_sort |
increased reservoir ages and poorly ventilated deep waters inferred in the glacial eastern equatorial pacific |
publisher |
Nature Pub. Group |
publishDate |
2015 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4507014/ http://www.ncbi.nlm.nih.gov/pubmed/26137976 https://doi.org/10.1038/ncomms8420 |
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/PMC4507014/ http://www.ncbi.nlm.nih.gov/pubmed/26137976 http://dx.doi.org/10.1038/ncomms8420 |
op_rights |
Copyright © 2015, Nature Publishing Group, a division of 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 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/ncomms8420 |
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Nature Communications |
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6 |
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1 |
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