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dc.contributor.authorCole, Catherine Sarah
dc.contributor.authorFinch, Adrian Anthony
dc.contributor.authorHintz, Christopher
dc.contributor.authorHintz, Kenneth
dc.contributor.authorAllison, Nicola
dc.identifier.citationCole , C S , Finch , A A , Hintz , C , Hintz , K & Allison , N 2016 , ' Understanding cold bias : variable response of skeletal Sr/Ca to seawater p CO 2 in acclimated massive Porites corals ' , Scientific Reports , vol. 6 , 26888 .
dc.identifier.otherPURE: 242479177
dc.identifier.otherPURE UUID: fed29785-090a-4838-b9b7-38f3f5e25250
dc.identifier.otherScopus: 84973366562
dc.identifier.otherORCID: /0000-0002-3689-1517/work/38002335
dc.identifier.otherORCID: /0000-0003-3720-1917/work/42594133
dc.identifier.otherWOS: 000376879100001
dc.descriptionThis work was supported by the UK Natural Environment Research Council (award NE/I022973/1).en
dc.description.abstractCoral skeletal Sr/Ca is a palaeothermometer commonly used to produce high resolution seasonal sea surface temperature (SST) records and to investigate the amplitude and frequency of ENSO and interdecadal climate events. The proxy relationship is typically calibrated by matching seasonal SST and skeletal Sr/Ca maxima and minima in modern corals. Applying these calibrations to fossil corals assumes that the temperature sensitivity of skeletal Sr/Ca is conserved, despite substantial changes in seawater carbonate chemistry between the modern and glacial ocean. We present Sr/Ca analyses of 3 genotypes of massive Porites spp. corals (the genus most commonly used for palaeoclimate reconstruction), cultured under seawater pCO2 reflecting modern, future (year 2100) and last glacial maximum (LGM) conditions. Skeletal Sr/Ca is indistinguishable between duplicate colonies of the same genotype cultured under the same conditions, but varies significantly in response to seawater pCO2 in two genotypes of Porites lutea, whilst Porites murrayensis is unaffected. Within P. lutea, the response is not systematic: skeletal Sr/Ca increases significantly (by 2-4%) at high seawater pCO2 relative to modern in both genotypes, and also increases significantly (by 4%) at low seawater pCO2 in one genotype. This magnitude of variation equates to errors in reconstructed SST of up to -5°C.
dc.relation.ispartofScientific Reportsen
dc.rightsCopyright 2016 the authors. 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
dc.subjectGE Environmental Sciencesen
dc.subjectQD Chemistryen
dc.subjectQH301 Biologyen
dc.titleUnderstanding cold bias : variable response of skeletal Sr/Ca to seawater pCO2 in acclimated massive Porites coralsen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Earth & Environmental Sciencesen
dc.contributor.institutionUniversity of St Andrews. Scottish Oceans Instituteen
dc.contributor.institutionUniversity of St Andrews. St Andrews Isotope Geochemistryen
dc.contributor.institutionUniversity of St Andrews. Earth and Environmental Sciencesen
dc.contributor.institutionUniversity of St Andrews. Marine Alliance for Science & Technology Scotlanden
dc.description.statusPeer revieweden

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