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dc.rights.licenseopenen_US
dc.contributor.authorROBINSON, Rebecca S.
dc.contributor.authorJONES, Colin A.
dc.contributor.authorKELLY, Roger P.
dc.contributor.authorRAFTER, Patrick
dc.contributor.authorETOURNEAU, Johan
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorMARTINEZ, Philippe
IDREF: 154067628
dc.date.accessioned2024-06-06T10:36:38Z
dc.date.available2024-06-06T10:36:38Z
dc.date.issued2019-02-28
dc.identifier.issn0094-8276en_US
dc.identifier.urioai:crossref.org:10.1029/2018gl081315
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/200306
dc.description.abstractThe emergence of high-amplitude, low-frequency glacial-interglacial cycles during the mid-Pleistocene climate transition (MPT; 800–1,200 ka) is associated with global cooling. In the eastern equatorial Pacific, sea surface temperatures cooled, and the upwelling-induced cold tongue expanded significantly during the MPT. Here we use sedimentary records of iron, biogenic silica, and nutrient-nitrogen consumption to evaluate biogeochemical changes hypothesized to accompany the cold tongue expansion. Our results suggest that the eastern equatorial Pacific of the MPT hosted surface waters with higher nitrate contents and biogenic silica production relative to the last 600 ka. Increased production occurred despite low iron supply. We attribute this to enhanced upwelling and nutrient enrichment of thermocline waters, both likely related to the northward migration of Southern Ocean fronts. The return of these fronts to their southward positions after the MPT may be associated with stronger drawdown of nutrients and, potentially, atmospheric CO2 in the Southern Ocean.
dc.language.isoENen_US
dc.sourcecrossref
dc.title.enA Cool, Nutrient‐Enriched Eastern Equatorial Pacific During the Mid‐Pleistocene Transition
dc.title.alternativeGeophys. res. lett.en_US
dc.typeArticle de revueen_US
dc.identifier.doi10.1029/2018gl081315en_US
dc.subject.halSciences de l'environnementen_US
bordeaux.journalGeophysical Research Lettersen_US
bordeaux.page2187-2195en_US
bordeaux.volume46en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.issue4en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamPALEOen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcedissemin
hal.identifierhal-04603381
hal.version1
hal.date.transferred2024-06-06T10:36:40Z
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exporttrue
workflow.import.sourcedissemin
dc.rights.ccPas de Licence CCen_US
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Geophysical%20Research%20Letters&rft.date=2019-02-28&rft.volume=46&rft.issue=4&rft.spage=2187-2195&rft.epage=2187-2195&rft.eissn=0094-8276&rft.issn=0094-8276&rft.au=ROBINSON,%20Rebecca%20S.&JONES,%20Colin%20A.&KELLY,%20Roger%20P.&RAFTER,%20Patrick&ETOURNEAU,%20Johan&rft.genre=article


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