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dc.contributor.authorChen, Tianyu
dc.contributor.authorRobinson, Laura F.
dc.contributor.authorLi, Tao
dc.contributor.authorBurke, Andrea
dc.contributor.authorZhang, Xu
dc.contributor.authorStewart, Joseph A.
dc.contributor.authorWhite, Nicky J.
dc.contributor.authorKnowles, Timothy D.J.
dc.identifier.citationChen , T , Robinson , L F , Li , T , Burke , A , Zhang , X , Stewart , J A , White , N J & Knowles , T D J 2023 , ' Radiocarbon evidence for the stability of polar ocean overturning during the Holocene ' , Nature Geoscience , vol. 16 , pp. 631-636 .
dc.identifier.otherPURE: 287326017
dc.identifier.otherPURE UUID: 4dbcef1a-d8ea-4e73-9a35-5434da070d34
dc.identifier.otherScopus: 85162895257
dc.identifier.otherORCID: /0000-0002-3754-1498/work/139156623
dc.descriptionFunding: T.C. acknowledges support from the Strategic Priority Research Program of Chinese Academy of Sciences (XDB40010200), Fundamental Research Funds for the Central Universities (020614380116) and National Natural Science Foundation of China (41991325, 41822603 and 42021001). L.F.R. acknowledges support from the Natural Environment Research Council (NE/S001743/1, NE/R005117/1, NE/N003861/1 and NE/X00127X/1).en
dc.description.abstractProxy-based studies have linked the pre-industrial atmospheric pCO2 rise of ∼20 ppmv in the mid- to late Holocene to an inferred increase in the Southern Ocean overturning and associated biogeochemical changes. However, the history of polar ocean overturning and ventilation through the Holocene remains poorly constrained, leaving important gaps in the assessment of the feedbacks between changes in ocean circulation and the carbon cycle in a warm climate state. The deep-ocean radiocarbon content, which provides a measure of ventilation, responds to circulation changes on centennial to millennial time scales. Here we present absolutely dated deep-sea coral radiocarbon records from the Drake Passage, between South America and Antarctica, and Reykjanes Ridge, south of Iceland, over the Holocene. Our data suggest that ventilation in the Antarctic circumpolar waters and North Atlantic Deep Water is surprisingly invariant within proxy uncertainties at our sampling resolution. Our findings indicate that long-term, large-scale polar ocean overturning has not been disturbed to a level resolvable by radiocarbon and is probably not responsible for the millennial atmosphere pCO2 evolution through the Holocene. Instead, continuous nutrient and carbon redistribution within the water column following deglaciation, as well as changes in land organic carbon stock, might have regulated atmospheric CO2 budget during this period.
dc.relation.ispartofNature Geoscienceen
dc.rightsCopyright © The Author(s) 2023. 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
dc.subjectGC Oceanographyen
dc.subjectGE Environmental Sciencesen
dc.titleRadiocarbon evidence for the stability of polar ocean overturning during the Holoceneen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Earth & Environmental Sciencesen
dc.contributor.institutionUniversity of St Andrews. St Andrews Isotope Geochemistryen
dc.description.statusPeer revieweden

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