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Improving North Atlantic Marine Core Chronologies Using 230Th Normalization

dc.rights.licenseopenen_US
hal.structure.identifierLaboratory of Molecular and Cellular Signaling
dc.contributor.authorMISSIAEN, Lise
hal.structure.identifierLaboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE]
hal.structure.identifierPaléocéanographie [PALEOCEAN]
dc.contributor.authorWAELBROECK, C.
hal.structure.identifierLaboratoire de Sciences de la Terre [LST]
dc.contributor.authorPICHAT, S.
hal.structure.identifierGeological Institute [ETHZ]
dc.contributor.authorJACCARD, Samuel L.
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorEYNAUD, Frederique
IDREF: 144113570
dc.contributor.authorGREENOP, R.
dc.contributor.authorBURKE, A.
dc.date.accessioned2024-02-28T09:58:02Z
dc.date.available2024-02-28T09:58:02Z
dc.date.issued2019-07-30
dc.identifier.issn2572-4525en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/188480
dc.description.abstractEnProducing independent and accurate chronologies for marine sediments is a prerequisite to understand the sequence of millennial‐scale events and reveal potential temporal offsets between marine and continental records, or between different marine records, possibly from different regions. The last 40 ky is a generally well‐constrained period since radiocarbon (14C) can be used as an absolute dating tool. However, in the northern North Atlantic, calendar ages cannot be directly derived from 14C ages, due to temporal and spatial variations of surface reservoir ages. Alternatively, chronologies can be derived by aligning Greenland ice‐core time series with marine surface records. Yet this approach suffers from the lack of clearly defined climatic events between 14.7 and 23.3 cal ky BP (hereafter ka), a crucial period encompassing Heinrich Stadial 1 and the onset of the last deglaciation. In this study, (i) we assess the benefits of 230Th normalization to refine the sedimentation history between surface temperature alignment tie points and (ii) revisit the chronologies of three North Atlantic marine records. Our study supports the contention that the marked increase in the Greenland Ca2+ record at 17.48 ka ± 0.21 ky (1σ) occurred withindating uncertainty of sea surface temperature cooling in the North Atlantic at the onset of Heinrich Stadial 1. This sharp feature might be useful for future chronostratigraphic alignments to remedy the lack of chronological constraint between 14.7 and 23.3 ka for North Atlantic marine records that are subject to large changes in 14C surface reservoir age.
dc.language.isoENen_US
dc.title.enImproving North Atlantic Marine Core Chronologies Using 230Th Normalization
dc.typeArticle de revueen_US
dc.identifier.doi10.1029/2018PA003444en_US
dc.subject.halPlanète et Univers [physics]/Océan, Atmosphèreen_US
dc.subject.halPlanète et Univers [physics]/Sciences de la Terre/Climatologieen_US
dc.subject.halSciences de l'environnementen_US
dc.description.sponsorshipEuropeElucidating the Causes and Effects of Atlantic Circulation Changes through Model-Data Integrationen_US
bordeaux.journalPaleoceanography and Paleoclimatologyen_US
bordeaux.page1057-1073en_US
bordeaux.volume34en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.issue7en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamPALEOen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcehal
hal.identifierhal-02407133
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=Paleoceanography%20and%20Paleoclimatology&rft.date=2019-07-30&rft.volume=34&rft.issue=7&rft.spage=1057-1073&rft.epage=1057-1073&rft.eissn=2572-4525&rft.issn=2572-4525&rft.au=MISSIAEN,%20Lise&WAELBROECK,%20C.&PICHAT,%20S.&JACCARD,%20Samuel%20L.&EYNAUD,%20Frederique&rft.genre=article


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