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Multiproxy record of suborbital-scale climate changes in the Algero-Balearic Basin during late MIS 20-Termination IX

2021-05Journal article Restricted access
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dc.contributor.authorQuivelli, Ornella
dc.contributor.authorMarino, Maria
dc.contributor.authorRodrigues, Teresa
dc.contributor.authorGirone, Angela
dc.contributor.authorMaiorano, Patrizia
dc.contributor.authorBertini, Adele
dc.contributor.authorNiccolini, Gabriele
dc.contributor.authorTrotta, Samanta
dc.contributor.authorBassinot, Franck
dc.date.accessioned2021-09-08T10:57:53Z
dc.date.available2021-09-08T10:57:53Z
dc.date.issued2021-05
dc.description.abstractHigh-resolution quantitative analyses have been carried out in samples from the Ocean Drilling Program (ODP) Site 975 in the Algero-Balearic basin through late Marine Isotope Stage (MIS 20)-Termination IX (800-784 ka). The multi-proxy study combines data of planktonic delta O-18, delta C-13, calcareous plankton (coccolithophores, foraminifera), palynomorphs, alkenone-based sea surface temperature (SST), % alkenone tetraunsatured (% C-37:4), and terrigenous biomarkers (C-23-C-31 n-alkanes, C-22-C-30 n-alkanols) with the aim to reconstruct climate-induced paleoenvironmental changes at orbital-submillennial scale, in a crucial time interval of the Early-Midde Pleistocene transition. The surface water delta O-18(sw) has been reconstructed from delta O-18(G.bulloides) and alkenone-based SST as a proxy for salinity changes. The late MIS 20 has been subdivided in several phases based on evidence of (i) meltwater events of polar origin or from surrounding mountain glaciers, (ii) changes in the production rate of Western Mediterranean Deep Water (WMDW) and in deep water ventilation, (iii) variation in terrestrial input and river discharge, and iv) variations in the strength of the north westerlies, and polar front shift. Following a glacial stadial (lasting ca 3 kyr) marked by the strongest WMDW production, coeval with a boreal summer insolation minimum and a marked low sea level, the latest MIS 20 is characterized by a terminal stadial event (lasting ca 3.5 kyr), which is traced by the occurrence of cold-low salinity water, pointing to meltwater advection at the site location. Short-term warm and cool events occurred through Termination IX during sea level rise and insolation increase, preceding the onset of full MIS 19c, characterized by an organic rich layer (ORL) associated with insolation cycle 74. The succession of these climate and oceanographic events has been compared to evidences from other Mediterranean sites, highlighting similar basin-wide patterns, which recall the climate evolution of Termination I. The comparison of our results with the climate proxies from the Integrated Ocean Drilling Program (IODP) Site U1385 located west of Iberian margin made it possible to point at the connection between Mediterranean oceanographic and atmospheric dynamics and the northern hemisphere ice-sheet instability, providing insight on the relationship with the Atlantic meridional overturning circulation and thermal front migration. (C) 2021 Elsevier Ltd. All rights reserved.
dc.description.sponsorshipGeoscience PhD scholarship, Bari University (Italy); Fondi di Ateneo 2018; FCT
dc.identifier.doi10.1016/j.quascirev.2021.106916
dc.identifier.issn0277-3791
dc.identifier.urihttp://hdl.handle.net/10400.1/16965
dc.language.isoeng
dc.peerreviewedyes
dc.publisherPERGAMON-ELSEVIER SCIENCE LTD
dc.subjectODP Site 975
dc.subjectAlkenone-SST
dc.subject% C-37:4
dc.subjectContinental biomarkers
dc.subjectCalcareous plankton
dc.subjectPalynomorphs
dc.subjectOxygen and carbon stable isotopes
dc.subject.otherPhysical Geography; Geology
dc.titleMultiproxy record of suborbital-scale climate changes in the Algero-Balearic Basin during late MIS 20-Termination IX
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/9471 - RIDTI/151090/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/157544/PT
oaire.citation.startPage106916
oaire.citation.titleQuaternary Science Reviews
oaire.citation.volume260
oaire.fundingStream9471 - RIDTI
oaire.fundingStream6817 - DCRRNI ID
person.familyNameRodrigues
person.givenNameTeresa
person.identifier.ciencia-idEC18-2390-9594
person.identifier.orcid0000-0001-7811-7506
person.identifier.ridG-2912-2013
person.identifier.scopus-author-id7004330274
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
rcaap.rightsrestrictedAccess
rcaap.typearticle
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