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On the combination of the planktonic foraminiferal Mg/Ca, clumped (Δ47) and conventional (δ18O) stable isotope paleothermometers in palaeoceanographic studies

dc.rights.licenseopenen_US
dc.contributor.authorPERAL, Marion
dc.contributor.authorBASSINOT, Franck
dc.contributor.authorDAËRON, Mathieu
dc.contributor.authorBLAMART, Dominique
dc.contributor.authorBONNIN, Jérôme
dc.contributor.authorJORISSEN, Frans
dc.contributor.authorKISSEL, Catherine
dc.contributor.authorMICHEL, Elisabeth
dc.contributor.authorWAELBROECK, Claire
dc.contributor.authorREBAUBIER, Helene
dc.contributor.authorGRAY, William R
dc.date.accessioned2023-03-13T14:36:37Z
dc.date.available2023-03-13T14:36:37Z
dc.date.issued2022-12-15
dc.identifier.issn0016-7037en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/172273
dc.description.abstractEnAssuming that foraminiferal clumped isotope (Δ47) values are independent of seawater salinity and pH, the combination of Mg/Ca, δ18O and Δ47 values, may in theory allow us to disentangle the temperature, salinity/δ18Osw and pH signals. Here, we present a new Mg/Ca-Δ47 dataset for modern planktonic foraminifera, from various oceanographic basins and covering a large range of temperatures (from 0.2 to 25.4 °C). These measurements were performed on the same samples and species as the ones used for the foraminiferal Δ47 calibration of Peral et al. (2018), allowing comparison between both Mg/Ca and Δ47 paleothermometers (excluding the two benthic foraminiferal data points). There is a good agreement between these two paleothermometers when the Mg/Ca-temperature is corrected for seawater salinity and pH, suggesting that foraminiferal Δ47 may not be influenced by salinity or pH. However, our results show that Δ47 temperature uncertainties still limit our ability to reconstruct pH and δ18Osw from the combination of Mg/Ca, δ18O and Δ47 in a useful manner. We also find that disagreements between Mg/Ca and Δ47 values in G. bulloides persist after correction for vital, salinity and pH effects, suggesting that other process(es) may also influence Mg/Ca in this species. This study also provides an updated I-CDES version of the previously published planktonic and benthic foraminiferal Δ47 calibration of Peral et al. (2018), covering a range of temperature from −2 to 25.4 °C.
dc.language.isoENen_US
dc.title.enOn the combination of the planktonic foraminiferal Mg/Ca, clumped (Δ47) and conventional (δ18O) stable isotope paleothermometers in palaeoceanographic studies
dc.title.alternativeGeochimica et Cosmochimica Actaen_US
dc.typeArticle de revueen_US
dc.identifier.doi10.1016/j.gca.2022.10.030en_US
dc.subject.halSciences de l'environnementen_US
bordeaux.journalGeochimica et Cosmochimica Actaen_US
bordeaux.page22-34en_US
bordeaux.volume339en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamPALEOen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
hal.exportfalse
dc.rights.ccPas de Licence CCen_US
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Geochimica%20et%20Cosmochimica%20Acta&rft.date=2022-12-15&rft.volume=339&rft.spage=22-34&rft.epage=22-34&rft.eissn=0016-7037&rft.issn=0016-7037&rft.au=PERAL,%20Marion&BASSINOT,%20Franck&DA%C3%8BRON,%20Mathieu&BLAMART,%20Dominique&BONNIN,%20J%C3%A9r%C3%B4me&rft.genre=article


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