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dc.contributor.authorChen, Tianyu
dc.contributor.authorRobinson, Laura F.
dc.contributor.authorBurke, Andrea
dc.contributor.authorClaxton, Louis
dc.contributor.authorHain, Mathis P.
dc.contributor.authorLi, Tao
dc.contributor.authorRae, James W. B.
dc.contributor.authorStewart, Joseph
dc.contributor.authorKnowles, Timothy D. J.
dc.contributor.authorFornari, Daniel
dc.contributor.authorHarpp, Karen S.
dc.date.accessioned2021-04-11T23:46:36Z
dc.date.available2021-04-11T23:46:36Z
dc.date.issued2020-10-12
dc.identifier.citationChen , T , Robinson , L F , Burke , A , Claxton , L , Hain , M P , Li , T , Rae , J W B , Stewart , J , Knowles , T D J , Fornari , D & Harpp , K S 2020 , ' Persistently well-ventilated intermediate-depth ocean through the last deglaciation ' , Nature Geoscience . https://doi.org/10.1038/s41561-020-0638-6en
dc.identifier.issn1752-0894
dc.identifier.otherPURE: 270461130
dc.identifier.otherPURE UUID: 4e807e4d-1a47-4110-8bd8-29c12bc73e58
dc.identifier.otherORCID: /0000-0002-3754-1498/work/82179649
dc.identifier.otherORCID: /0000-0003-3904-2526/work/82179650
dc.identifier.otherWOS: 000577033800002
dc.identifier.otherScopus: 85092345107
dc.identifier.urihttp://hdl.handle.net/10023/23008
dc.descriptionThis study was funded by the European Research Council, the Natural Environment Research Council (NE/S001743/1; NE/N011716/1), the Philip Leverhulme Trust, the Strategic Priority Research Program of Chinese Academy of Sciences (XDB40010200), the National Natural Science Foundation of China (41822603), the US National Science Foundation (OCE-0926637, OCE-10309040 and OCE-0926491), a Marie Curie Reintegration Grant and the NOAA (National Oceanic and Atmospheric Administration) Ocean Exploration Trust.en
dc.description.abstractDuring the last deglaciation (~18–11 thousand years ago), existing radiocarbon (14C) reconstructions of intermediate waters in the mid- to low-latitude oceans show widely diverging trends, with some broadly tracking the atmosphere and others suggesting extreme depletions. These discrepancies cloud our understanding of the deglacial carbon cycle because of the diversity of hypotheses needed to explain these diverging records, for example, injections of 14C-dead geological carbon, mixing of extremely isolated waters from the abyssal ocean or changes in sites of deep-water ventilation. Here we present absolutely dated deglacial deep-sea coral 14C records of intermediate waters from the Galápagos Platform—close to the largest reported deglacial 14C depletions—together with data from the low-latitude Atlantic. Our records indicate coherent, well-equilibrated intermediate-water 14C ventilation in both oceans relative to the atmosphere throughout the deglaciation. The observed overall trend towards 14C-enriched signatures in our records is largely due to enhanced air–sea carbon isotope exchange efficiency under increasing atmospheric pCO2. These results suggest that the 14C-depleted signatures from foraminifera are likely sedimentary rather than water mass features, and provide tight 14C constraints for modelling changes in circulation and carbon cycle during the last deglaciation.
dc.language.isoeng
dc.relation.ispartofNature Geoscienceen
dc.rightsCopyright © 2020 The Author(s). This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1038/s41561-020-0638-6en
dc.subjectGE Environmental Sciencesen
dc.subjectGC Oceanographyen
dc.subjectDASen
dc.subject.lccGEen
dc.subject.lccGCen
dc.titlePersistently well-ventilated intermediate-depth ocean through the last deglaciationen
dc.typeJournal articleen
dc.description.versionPostprinten
dc.contributor.institutionUniversity of St Andrews.School of Earth & Environmental Sciencesen
dc.contributor.institutionUniversity of St Andrews.St Andrews Isotope Geochemistryen
dc.identifier.doihttps://doi.org/10.1038/s41561-020-0638-6
dc.description.statusPeer revieweden
dc.date.embargoedUntil2021-04-12


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