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Persistent influence of obliquity on ice age terminations since the Middle Pleistocene transition

2020Journal article Open access
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dc.contributor.authorBajo, Petra
dc.contributor.authorDrysdale, Russell N.
dc.contributor.authorWoodhead, Jon D.
dc.contributor.authorHellstrom, John C.
dc.contributor.authorHodell, David
dc.contributor.authorFerretti, Patrizia
dc.contributor.authorVoelker, Antje
dc.contributor.authorZanchetta, Giovanni
dc.contributor.authorRodrigues, Teresa
dc.contributor.authorWolff, Eric
dc.contributor.authorTyler, Jonathan
dc.contributor.authorFrisia, Silvia
dc.contributor.authorSpötl, Christoph
dc.contributor.authorFallick, Anthony E.
dc.date.accessioned2021-08-31T16:48:45Z
dc.date.available2021-08-31T16:48:45Z
dc.date.issued2020
dc.description.abstractRadiometric dating of glacial terminations over the past 640,000 years suggests pacing by Earth’s climatic precession, with each glacial-interglacial period spanning four or five cycles of ~20,000 years. However, the lack of firm age estimates for older Pleistocene terminations confounds attempts to test the persistence of precession forcing. We combine an Italian speleothem record anchored by a uranium-lead chronology with North Atlantic ocean data to show that the first two deglaciations of the so-called 100,000-year world are separated by two obliquity cycles, with each termination starting at the same high phase of obliquity, but at opposing phases of precession. An assessment of 11 radiometrically dated terminations spanning the past million years suggests that obliquity exerted a persistent influence on not only their initiation but also their duration.pt_PT
dc.description.sponsorshipWe acknowledge financial support from Australian Research Council Discovery Project grants 0664621 (to J.D.W.), 110102185 (to R.N.D., J.D.W., J.C.H., E.W., A.E.F., and S.F.), and 160102969 (to R.N.D., J.D.W., G.Z., E.W., and P.F.). We thank the Gruppo Speleologico Lucchese and the Federazione Speleologica Toscana for logistic and funding support. The SUERC contribution to this study falls within the framework of the Scottish Alliance for Geoscience, Environment and Society (SAGES). P.B. was the recipient of a University of Melbourne International Postgraduate Research Scholarship and Postgraduate Writing-Up Award supported by the Albert Shimmins Fund. J.C.H. was the recipient of an Australian Research Council Future Fellowship (FT130100801). P.F. acknowledges support from the European Union through a Marie-Curie Reintegration grant (PERG-GA-2010-272134 - MILLEVARIABILI). D.H. acknowledges support from the UK Natural Environmental Research Council. E.W. is supported by a Royal Society Professorship. A.H.L.V. and T.R. received financial support from Fundação para a Ciência e a Tecnologia (FCT, Portugal) projects MOWCADYN (PTDC/MAR-PRO/3761/2012), WarmWorld (PTDC/CTA-GEO/29897/2017), and CCMAR (UID/ Multi/04326/2019). Samples from the marine sites were provided by the Integrated Ocean Drilling Program to D.H., A.H.L.V., and T.R.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationBajo, P., Drysdale, R. N., Woodhead, J. D., Hellstrom, J. C., Hodell, D., Ferretti, P., Voelker, A. H., et al. (2020). Persistent influence of obliquity on ice age terminations since the Middle Pleistocene transition.. Science (New York, N.Y.), 367 (6483), 1235-1239. https://doi.org/10.1126/science.aaw1114pt_PT
dc.identifier.doi10.1126/science.aaw1114pt_PT
dc.identifier.issn0036-8075
dc.identifier.urihttp://hdl.handle.net/10400.1/16914
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherAAAS - American Association for the Advancement of Sciencept_PT
dc.relationSurface and Mediterranean Outflow Water Dynamics in the Gulf of Cadiz during the Pleistocene
dc.relationFeatures and lessons from Past Interglacials ? warm periods ? over the last 1.5 Ma
dc.relationCentre of Marine Sciences
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.titlePersistent influence of obliquity on ice age terminations since the Middle Pleistocene transitionpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleSurface and Mediterranean Outflow Water Dynamics in the Gulf of Cadiz during the Pleistocene
oaire.awardTitleFeatures and lessons from Past Interglacials ? warm periods ? over the last 1.5 Ma
oaire.awardTitleCentre of Marine Sciences
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FMAR-PRO%2F3761%2F2012/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/9471 - RIDTI/PTDC%2FCTA-GEO%2F29897%2F2017/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FMulti%2F04326%2F2019/PT
oaire.citation.endPage1239pt_PT
oaire.citation.issue6483pt_PT
oaire.citation.startPage1235pt_PT
oaire.citation.titleSciencept_PT
oaire.citation.volume367pt_PT
oaire.fundingStream3599-PPCDT
oaire.fundingStream9471 - RIDTI
oaire.fundingStream6817 - DCRRNI ID
person.familyNameVoelker
person.familyNameRodrigues
person.givenNameAntje
person.givenNameTeresa
person.identifier2315310
person.identifier.ciencia-idC11E-D8E6-CDFA
person.identifier.ciencia-idEC18-2390-9594
person.identifier.orcid0000-0001-6465-6023
person.identifier.orcid0000-0001-7811-7506
person.identifier.ridC-5427-2012
person.identifier.ridG-2912-2013
person.identifier.scopus-author-id8784446000
person.identifier.scopus-author-id7004330274
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
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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