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Pervasive multidecadal variations in productivity within the Peruvian Upwelling System over the last millennium

dc.rights.licenseopenen_US
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorFLEURY, Sophie
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorMARTINEZ, Philippe
IDREF: 154067628
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorCROSTA, Xavier
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorCHARLIER, Karine
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorBILLY, Isabelle
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorHANQUIEZ, Vincent
hal.structure.identifierInstitut für Geowissenschaften [Kiel]
dc.contributor.authorBLANZ, T.
hal.structure.identifierInstitut für Geowissenschaften [Kiel]
dc.contributor.authorSCHNEIDER, R. R.
dc.date.accessioned2024-05-15T13:21:39Z
dc.date.available2024-05-15T13:21:39Z
dc.date.issued2015
dc.identifier.issn0277-3791en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/199890
dc.description.abstractEnThere is no agreement on the pluri-decadal expression of El Ni~ noeSouthern Oscillation (ENSO) in the Pacific over the last millennium. Marine records from the Peruvian margin indicate humid conditions (El Ni~ no-like mean conditions) over the Little Ice Age, while precipitation records from the eastern equatorial Pacific infer arid conditions (La Ni~ na-like mean conditions) for the same period. We here studied diatom assemblages, nitrogen isotopes, and major and minor elements at the lamination level in three laminated trigger cores located between 11 S and 15 S on the Peruvian shelf within the oxygen minimum zone (OMZ) to reconstruct precipitation and ocean productivity at the multiannual to multidecadal timescales over the last millennium. We respected the sediment structure, thus providing the first records of the mean climatic conditions at the origin of the lamination deposition, which ones represent several years. Light laminations were deposited under productive and dry conditions, indicative of La Ni~ na-like mean conditions in the system, while dark laminations were deposited under non-productive and humid conditions, representative of El Ni~ no-like mean conditions. La Ni~ na-like mean conditions were predominant during the Medieval Warm Period (MWP; 1000e600 years BP) and Current Warm Period (CWP; 150 years BP to present), while El Ni~ no-like mean conditions prevailed over the Little Ice Age (LIA; 600e150 years BP). We provide evidence for persistent multidecadal variations in productivity over the last millennium, which were disconnected from the mean climate state. Multidecadal variability has been stronger over the last 450 years concomitantly to increased variability in the NAO index. Two intervals of strong multidecadal variability were also observed over the MWP, congruent to decreased solar irradiance and increased volcanic activity.
dc.language.isoENen_US
dc.title.enPervasive multidecadal variations in productivity within the Peruvian Upwelling System over the last millennium
dc.typeArticle de revueen_US
dc.identifier.doi10.1016/j.quascirev.2015.08.006en_US
dc.subject.halPlanète et Univers [physics]/Océan, Atmosphèreen_US
dc.subject.halPlanète et Univers [physics]/Sciences de la Terre/Océanographieen_US
dc.subject.halPlanète et Univers [physics]/Sciences de la Terre/Climatologieen_US
bordeaux.journalQuaternary Science Reviewsen_US
bordeaux.page78-90en_US
bordeaux.volume125en_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
bordeaux.import.sourcehal
hal.identifierhal-02105556
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=Quaternary%20Science%20Reviews&rft.date=2015&rft.volume=125&rft.spage=78-90&rft.epage=78-90&rft.eissn=0277-3791&rft.issn=0277-3791&rft.au=FLEURY,%20Sophie&MARTINEZ,%20Philippe&CROSTA,%20Xavier&CHARLIER,%20Karine&BILLY,%20Isabelle&rft.genre=article


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