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Early Pleistocene (1.94–1.46 Ma) records for the upper mediterranean outflow Water branch reveal low and high latitude climate influences

2026-02Artigo científico Acesso aberto
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datacite.subject.sdg14:Proteger a Vida Marinha
datacite.subject.sdg13:Ação Climática
datacite.subject.sdg09:Indústria, Inovação e Infraestruturas
dc.contributor.authorVoelker, Antje
dc.contributor.authorDucassou, Emanuelle
dc.contributor.authorBalestra, Barbara
dc.contributor.authorFlores, Jose Abel
dc.contributor.authorActon, Gary D.
dc.contributor.authorRichter, Carl
dc.contributor.authorXuan, Chuang
dc.contributor.authorLofi, Johanna
dc.contributor.authorAlberto, Ana
dc.contributor.authorKuhnert, Henning
dc.contributor.authorZarikian, Carlos A. Alvarez
dc.date.accessioned2026-01-21T10:24:45Z
dc.date.available2026-01-21T10:24:45Z
dc.date.issued2026-02
dc.description.abstractThe Mediterranean Outflow Water (MOW), modified by paleoceanographic conditions and tectonic processes, played a significant role in the formation of sediments drifts along the Iberian Margin. Using sediment samples from IODP Hole U1387C, we explore the Early Pleistocene history of the upper MOW core above the central Faro Drift in the Gulf of Cadiz. The time series of benthic foraminifer stable isotope and grain size related data have a rigorous stratigraphic framework consisting of nannofossil biostratigraphy and paleomagnetic and delta 18O stratigraphy. The paleoenvironmental records are supplemented by natural gamma ray downhole logging data. Above the hiatus associated with the youngest dolostone, sandy to muddy contourite sedimentation started at 1.946 Ma, i.e., within Marine Isotope Stage (MIS) 74, at IODP Site U1387, slightly younger than at IODP Site U1389. Formation of contourite layers, reflected in the sortable silt and sand percentage records, strongly reacted to precession forcing, including semi- and quarter-precession cycles. The majority of the contourite beds developed during stadial (colder) climate periods, like previous observations from the Early to Late Pleistocene. Formation of contourite layers within MIS 53, MIS 55 and MIS 65, however, appear to be linked to the prevailing atmospheric conditions over North Africa. Periods of poor ventilation in the upper MOW were linked to insolation maxima and reduced ventilation in the Mediterranean Sea. Here, MIS 51 presents a peculiar case as poor ventilation reached from the surface to the lower North Atlantic Deep Water range, reflecting unique interglacial conditions that merit future exploration.eng
dc.description.sponsorshipUID/04326/2025, UID/PRR/04326/2025, PID2021-128322NB-I00 and PID2024-158309NB-I00
dc.identifier.doi10.1016/j.margeo.2025.107697
dc.identifier.issn0025-3227
dc.identifier.urihttp://hdl.handle.net/10400.1/28158
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relationUnderstanding past short and long-term climate variations as guidelines for future climate change
dc.relationSurface and Mediterranean Outflow Water Dynamics in the Gulf of Cadiz during the Pleistocene
dc.relationCentre for Marine and Environmental Research
dc.relation.ispartofMarine Geology
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectIODP expedition 339
dc.subjectMediterranean outflow water
dc.subjectEarly pleistocene
dc.subjectNannostratigraphy
dc.subjectMagnetostratigraphy
dc.subjectContourite beds
dc.subjectDownhole logging
dc.titleEarly Pleistocene (1.94–1.46 Ma) records for the upper mediterranean outflow Water branch reveal low and high latitude climate influenceseng
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleUnderstanding past short and long-term climate variations as guidelines for future climate change
oaire.awardTitleSurface and Mediterranean Outflow Water Dynamics in the Gulf of Cadiz during the Pleistocene
oaire.awardTitleCentre for Marine and Environmental Research
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/Investigador FCT/IF%2F01500%2F2014%2FCP1251%2FCT0003/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FMAR-PRO%2F3761%2F2012/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0101%2F2020/PT
oaire.citation.startPage107697
oaire.citation.titleMarine Geology
oaire.citation.volume492
oaire.fundingStreamInvestigador FCT
oaire.fundingStream3599-PPCDT
oaire.fundingStream6817 - DCRRNI ID
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameVoelker
person.givenNameAntje
person.identifier2315310
person.identifier.ciencia-idC11E-D8E6-CDFA
person.identifier.orcid0000-0001-6465-6023
person.identifier.ridC-5427-2012
person.identifier.scopus-author-id8784446000
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
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