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dc.contributor.authorKershaw, James
dc.contributor.authorStewart, Joseph A.
dc.contributor.authorStrawson, Ivo
dc.contributor.authorde Carvalho Ferreira, Maria Luiza
dc.contributor.authorRobinson, Laura F.
dc.contributor.authorHendry, Katharine R.
dc.contributor.authorSamperiz, Ana
dc.contributor.authorBurke, Andrea
dc.contributor.authorRae, James W.B.
dc.contributor.authorDay, Russell D.
dc.contributor.authorEtnoyer, Peter J.
dc.contributor.authorWilliams, Branwen
dc.contributor.authorHäussermann, Vreni
dc.identifier.citationKershaw , J , Stewart , J A , Strawson , I , de Carvalho Ferreira , M L , Robinson , L F , Hendry , K R , Samperiz , A , Burke , A , Rae , J W B , Day , R D , Etnoyer , P J , Williams , B & Häussermann , V 2023 , ' Ba/Ca of stylasterid coral skeletons records dissolved seawater barium concentrations ' , Chemical Geology , vol. 622 , 121355 .
dc.identifier.otherPURE: 283195201
dc.identifier.otherPURE UUID: 28d5a237-2880-4467-b93c-0b89f3ad818e
dc.identifier.otherRIS: urn:3918F3C3F554516C9880C4D73F6080AE
dc.identifier.otherORCID: /0000-0002-3754-1498/work/130204080
dc.identifier.otherORCID: /0000-0003-3904-2526/work/130204082
dc.identifier.otherScopus: 85148689782
dc.descriptionFunding: Funding for this work was provided by a NERC GW4+ Doctoral Training Partnership studentship (NE/S007504/1) awarded to J.K., an Antarctic Bursary awarded to J.A.S, and NERC grants awarded to L.F.R. (NE/S001743/1; NE/R005117/1; NE/N003861/1). Cruise DY081 was funded by European Research Council starting grant ICY-LAB (Grant Agreement 678371).en
dc.description.abstractThe concentration of dissolved barium in seawater ([Ba]SW) is influenced by both primary productivity and ocean circulation patterns. Reconstructing past subsurface [Ba]SW can therefore provide important information on processes which regulate global climate. Previous Ba/Ca measurements of scleractinian and bamboo deep-sea coral skeletons exhibit linear relationships with [Ba]SW, acting as archives for past Ba cycling. However, skeletal Ba/Ca ratios of the Stylasteridae – a group of widely distributed, azooxanthellate, hydrozoan coral – have not been previously studied.  Here, we present Ba/Ca ratios of modern stylasterid (aragonitic, calcitic and mixed mineralogy) and azooxanthellate scleractinian skeletons, paired with published proximal hydrographic data. We find that [Ba]SW and sample mineralogy are the primary controls on stylasterid Ba/Ca, while seawater temperature exerts a weak secondary control. [Ba]SW also exerts a strong control on azooxanthellate scleractinian Ba/Ca. However, Ba-incorporation into scleractinian skeletons varies between locations and across depth gradients, and we find a more sensitive relationship between scleractinian Ba/Ca and [Ba]SW than previously reported.  Paired Sr/Ca measurements suggest that this variability in scleractinian Ba/Ca may result from the influence of varying degrees of Rayleigh fractionation during calcification. We find that these processes exert a smaller influence on Ba-incorporation into stylasterid coral skeletons, a result consistent with other aspects of their skeletal geochemistry. Stylasterid Ba/Ca ratios are therefore a powerful, novel archive of past changes in [Ba]SW, particularly when measured in combination with temperature sensitive tracers such as Li/Mg or Sr/Ca. Indeed, with robust [Ba]SW and temperature proxies now established, stylasterids have the potential to be an important new archive for palaeoceanographic studies.
dc.relation.ispartofChemical Geologyen
dc.rightsCopyright © 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (
dc.subjectQE Geologyen
dc.subjectGE Environmental Sciencesen
dc.titleBa/Ca of stylasterid coral skeletons records dissolved seawater barium concentrationsen
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.contributor.institutionUniversity of St Andrews. Centre for Energy Ethicsen
dc.description.statusPeer revieweden

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