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Coccolithophores as proxy of seawater changes at orbital-to-millennial scale during middle Pleistocene Marine Isotope Stages 14-9 in North Atlantic core MD01-2446

2014-06Journal article Open access
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dc.contributor.authorMarino, Maria
dc.contributor.authorMaiorano, Patrizia
dc.contributor.authorTarantino, Francesca
dc.contributor.authorVoelker, Antje
dc.contributor.authorCapotondi, Lucilla
dc.contributor.authorGirone, Angela
dc.contributor.authorLirer, Fabrizio
dc.contributor.authorFlores, José-Abel
dc.contributor.authorNaafs, B. David A.
dc.date.accessioned2020-07-24T10:43:35Z
dc.date.available2020-07-24T10:43:35Z
dc.date.issued2014-06
dc.date.updated2020-07-23T21:21:49Z
dc.description.abstractmidlatitude North Atlantic, to reconstruct climatically induced sea surface water conditions throughout Marine Isotope Stages (MIS) 14–9. The data are compared to new and available paleoenvironmental proxies from the same site as well as other nearby North Atlantic records that support the coccolithophore signature at glacial‐interglacial to millennial climate scale. Total coccolithophore absolute abundance increases during interglacials but abruptly drops during the colder glacial phases and deglaciations. Coccolithophore warm water taxa (wwt) indicate that MIS11c and MIS9e experienced warmer and more stable conditions throughout the whole photic zone compared to MIS13. MIS11 was a long‐lasting warmer and stable interglacial characterized by a climate optimum during MIS11c when a more prominent influence of the subtropical front at the site is inferred. The wwt pattern also suggests distinct interstadial and stadial events lasting about 4–10 kyr. The glacial increases of Gephyrocapsa margereli‐G. muellerae 3–4 µm along with higher values of Corg, additionally supported by the total alkenone abundance at Site U1313, indicate more productive surface waters, likely reflecting the migration of the polar front into the midlatitude North Atlantic. Distinctive peaks of G. margereli‐muellerae (>4 µm), C. pelagicus pelagicus , Neogloboquadrina pachyderma left coiling, and reworked nannofossils, combined with minima in total nannofossil accumulation rate, are tracers of Heinrich‐type events during MIS12 and MIS10. Additional Heinrich‐type events are suggested during MIS12 and MIS14 based on biotic proxies, and we discuss possible iceberg sources at these times. Our results improve the understanding of mid‐Brunhes paleoclimate and the impact on phytoplankton diversity in the midlatitude North Atlantic region.pt_PT
dc.description.sponsorshipProvided by PTCRIS: 58282, C2007-FCT/319/2006pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1002/2013pa002574pt_PT
dc.identifier.issn0883-8305
dc.identifier.slugcv-prod-423450
dc.identifier.urihttp://hdl.handle.net/10400.1/14139
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.relationPast Ocean Circulation and Productivity Changes on the Portuguese Margin and in the Open North Atlantic: Northern Hemisphere - Antarctica Linkages 380,000 to 800,000 years ago (PORTO)
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectCoccolithophorespt_PT
dc.subjectMicropaleontologypt_PT
dc.subjectMiddle Pleistocenept_PT
dc.subjectWestern Iberian marginpt_PT
dc.subjectGlacial - interglacial cyclespt_PT
dc.subjectAbrupt climate changept_PT
dc.subjectNorth Atlanticpt_PT
dc.titleCoccolithophores as proxy of seawater changes at orbital-to-millennial scale during middle Pleistocene Marine Isotope Stages 14-9 in North Atlantic core MD01-2446pt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitlePast Ocean Circulation and Productivity Changes on the Portuguese Margin and in the Open North Atlantic: Northern Hemisphere - Antarctica Linkages 380,000 to 800,000 years ago (PORTO)
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/PDCT/PDCT%2FMAR%2F58282%2F2004/PT
oaire.citation.conferencePlaceUnited Statespt_PT
oaire.citation.endPage532pt_PT
oaire.citation.issue29pt_PT
oaire.citation.startPage518pt_PT
oaire.citation.titlePaleoceanographypt_PT
oaire.citation.volume29pt_PT
oaire.fundingStreamPDCT
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.nameFundação para a Ciência e a Tecnologia
rcaap.cv.cienciaidC11E-D8E6-CDFA | Antje Helga Luise Voelker
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublication.latestForDiscoverybca80a86-eb35-4bca-a4ba-85b53831d69e
relation.isProjectOfPublicationd8e216cd-ca2b-4b9c-bdd6-989279055835
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