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The nature of deep overturning and reconfigurations of the silicon cycle across the last deglaciation

dc.rights.licenseopenen_US
hal.structure.identifierCentre d'Etudes de la Neige [CEN]
dc.contributor.authorDUMONT, M.
hal.structure.identifierUniversity of Edinburgh [Edin.]
dc.contributor.authorPICHEVIN, L.
hal.structure.identifierSchool of Geosciences [Edinburgh]
dc.contributor.authorGEIBERT, W.
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorCROSTA, Xavier
hal.structure.identifierLaboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE]
hal.structure.identifierPaléocéanographie [PALEOCEAN]
dc.contributor.authorMICHEL, Elisabeth
hal.structure.identifierScottish Universities Environmental Research Centre [SUERC]
dc.contributor.authorMORETON, S.
hal.structure.identifierUniversity of Edinburgh [Edin.]
dc.contributor.authorDOBBY, K.
hal.structure.identifierUniversity of Edinburgh [Edin.]
dc.contributor.authorGANESHRAM, R.
dc.date.accessioned2024-03-27T10:16:21Z
dc.date.available2024-03-27T10:16:21Z
dc.date.issued2020-03-24
dc.identifier.issn2041-1723en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/189008
dc.description.abstractEnChanges in ocean circulation and the biological carbon pump have been implicated as the drivers behind the rise in atmospheric CO 2 across the last deglaciation; however, the processes involved remain uncertain. Previous records have hinted at a partitioning of deep ocean ventilation across the two major intervals of atmospheric CO 2 rise, but the consequences of differential ventilation on the Si cycle has not been explored. Here we present three new records of silicon isotopes in diatoms and sponges from the Southern Ocean that together show increased Si supply from deep mixing during the deglaciation with a maximum during the Younger Dryas (YD). We suggest Antarctic sea ice and Atlantic overturning conditions favoured abyssal ocean ventilation at the YD and marked an interval of Si cycle reorganisation. By regulating the strength of the biological pump, the glacial-interglacial shift in the Si cycle may present an important control on Pleistocene CO 2 concentrations.
dc.language.isoENen_US
dc.title.enThe nature of deep overturning and reconfigurations of the silicon cycle across the last deglaciation
dc.typeArticle de revueen_US
dc.identifier.doi10.1038/s41467-020-15101-6en_US
dc.subject.halPlanète et Univers [physics]/Sciences de la Terre/Climatologieen_US
dc.subject.halPlanète et Univers [physics]/Océan, Atmosphèreen_US
dc.subject.halPlanète et Univers [physics]/Sciences de la Terre/Océanographieen_US
bordeaux.journalNature Communicationsen_US
bordeaux.volume11en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.issue1en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamPALEOen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcehal
hal.identifierhal-02520960
hal.version1
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exportfalse
workflow.import.sourcehal
dc.rights.ccPas de Licence CCen_US
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Nature%20Communications&rft.date=2020-03-24&rft.volume=11&rft.issue=1&rft.eissn=2041-1723&rft.issn=2041-1723&rft.au=DUMONT,%20M.&PICHEVIN,%20L.&GEIBERT,%20W.&CROSTA,%20Xavier&MICHEL,%20Elisabeth&rft.genre=article


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