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dc.rights.licenseopenen_US
dc.contributor.authorGONZÁLEZ-LANCHAS, A.
dc.contributor.authorFLORES, J.-A.
dc.contributor.authorSIERRO, F.J.
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorSANCHEZ GONI, Maria Fernanda
dc.contributor.authorRODRIGUES, T.
dc.contributor.authorAUSÍN, B.
dc.contributor.authorOLIVEIRA, D.
dc.contributor.authorNAUGHTON, F.
dc.contributor.authorMARINO, M.
dc.contributor.authorMAIORANO, P.
dc.contributor.authorBALESTRA, B.
dc.date.accessioned2023-12-18T09:31:35Z
dc.date.available2023-12-18T09:31:35Z
dc.date.issued2021-05-30
dc.identifier.issn2572-4517en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/186683
dc.description.abstractEnNowadays, primary productivity variations at the SW Iberian Margin (IbM) are primarily controlled by wind-driven upwelling. Thus, major changes in atmospheric circulation and wind regimes between the Marine Isotope Stages (MIS) 12 and 9 could have driven substantial changes in phytoplankton productivity which remains poorly understood. We present a high-resolution calcareous nannofossil record from the Shackleton Site Integrated Ocean Discovery Program Site U1385 that allow the assessment of primary productivity and changing surface conditions on orbital and suborbital timescales over the SW IbM. These records are directly compared and integrated with terrestrial – Mediterranean forest pollen – and marine – benthic and planktic oxygen stable isotopes (δ18O), alkenone concentration [C37], Uk´37-Sea Surface Temperature and % C37:4 – proxy records from Site U1385. Our results indicate intra-interglacial increase in primary productivity together with intensification of the Azores anticyclonic high-pressure cell beyond the summer that suggests a two-phase upwelling behavior during the full interglacial MIS 11c (∼420–397 ka), potentially drived by atmospheric NAO-like variability. Primary productivity is largely enhanced during the inception of glacial MIS 10 and the early MIS 10 (∼392–356 ka), linked to intensified upwelling and associated processes during a period of strengthened atmospheric circulation. In agreement with the conditions observed during Heinrich events of the last glacial cycle, primary productivity reductions during abrupt cold episodes, including the Heinrich-type (Ht) events 4 to 1 (∼436, 392, 384 and 339 ka) and the Terminations V and IV, seems to be the result of halocline formation induced by meltwater arrival, reducing the regional upward nutrient transference. © 2021. The Authors.
dc.language.isoENen_US
dc.rightsAttribution 3.0 United States*
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/us/*
dc.title.enControl Mechanisms of Primary Productivity Revealed by Calcareous Nannoplankton From Marine Isotope Stages 12 to 9 at the Shackleton Site (IODP Site U1385)
dc.typeArticle de revueen_US
dc.identifier.doi10.1029/2021PA004246en_US
dc.subject.halSciences de l'environnementen_US
bordeaux.journalPaleoceanography and Paleoclimatologyen_US
bordeaux.volume36en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.issue6en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamPALEOen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
hal.identifierhal-04349879
hal.version1
hal.date.transferred2023-12-18T09:31:38Z
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exporttrue
dc.rights.ccCC BYen_US
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Paleoceanography%20and%20Paleoclimatology&rft.date=2021-05-30&rft.volume=36&rft.issue=6&rft.eissn=2572-4517&rft.issn=2572-4517&rft.au=GONZ%C3%81LEZ-LANCHAS,%20A.&FLORES,%20J.-A.&SIERRO,%20F.J.&SANCHEZ%20GONI,%20Maria%20Fernanda&RODRIGUES,%20T.&rft.genre=article


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