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A spatiotemporal reconstruction of sea-surface temperatures in the North Atlantic during Dansgaard–Oeschger events 5–8

2018-06-26Journal article Open access
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dc.contributor.authorJensen, Mari F.
dc.contributor.authorNummelin, Aleksi
dc.contributor.authorNielsen, Søren B.
dc.contributor.authorSadatzki, Henrik
dc.contributor.authorSessford, Evangeline
dc.contributor.authorRisebrobakken, Bjørg
dc.contributor.authorAndersson, Carin
dc.contributor.authorVoelker, Antje
dc.contributor.authorWilliam H. G., Roberts
dc.contributor.authorPedro, Joel
dc.contributor.authorBorn, Andreas
dc.date.accessioned2020-07-23T14:37:00Z
dc.date.available2020-07-23T14:37:00Z
dc.date.issued2018-06-26
dc.date.updated2020-07-23T14:04:20Z
dc.description.abstractHere, we establish a spatiotemporal evolution of the sea-surface temperatures in the North Atlantic over Dansgaard–Oeschger (DO) events 5–8 (approximately 30– 40 kyr) using the proxy surrogate reconstruction method. Proxy data suggest a large variability in North Atlantic seasurface temperatures during the DO events of the last glacial period. However, proxy data availability is limited and cannot provide a full spatial picture of the oceanic changes. Therefore, we combine fully coupled, general circulation model simulations with planktic foraminifera based seasurface temperature reconstructions to obtain a broader spatial picture of the ocean state during DO events 5–8. The resulting spatial sea-surface temperature patterns agree over a number of different general circulation models and simulations. We find that sea-surface temperature variability over the DO events is characterized by colder conditions in the subpolar North Atlantic during stadials than during interstadials, and the variability is linked to changes in the Atlantic Meridional Overturning circulation and in the sea-ice cover. Forced simulations are needed to capture the strength of the temperature variability and to reconstruct the variabil ity in other climatic records not directly linked to the seasurface temperature reconstructions. This is the first time the proxy surrogate reconstruction method has been applied to oceanic variability during MIS3. Our results remain robust, even when age uncertainties of proxy data, the number of available temperature reconstructions, and different climate models are considered. However, we also highlight shortcomings of the methodology that should be addressed in future implementations.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.5194/cp-14-901-2018pt_PT
dc.identifier.issn1814-9324
dc.identifier.slugcv-prod-423423
dc.identifier.urihttp://hdl.handle.net/10400.1/14129
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherEuropean Geosciences Unionpt_PT
dc.relationArctic Sea Ice and Greenland Ice Sheet Sensitivity
dc.subjectClimate modelingpt_PT
dc.subjectPaleotemperaturept_PT
dc.subjectNorth Atlanticpt_PT
dc.subjectMarine Isotope Stage 3pt_PT
dc.subjectPlanktonic foraminiferapt_PT
dc.titleA spatiotemporal reconstruction of sea-surface temperatures in the North Atlantic during Dansgaard–Oeschger events 5–8pt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleArctic Sea Ice and Greenland Ice Sheet Sensitivity
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FMulti%2F04326%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/EC/FP7/610055/EU
oaire.citation.conferencePlaceGermanypt_PT
oaire.citation.endPage922pt_PT
oaire.citation.issue14pt_PT
oaire.citation.startPage901pt_PT
oaire.citation.titleClimate of the Pastpt_PT
oaire.citation.volume14pt_PT
oaire.fundingStream5876
oaire.fundingStreamFP7
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/10.13039/501100008530
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameEuropean Commission
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.isProjectOfPublication868b4818-3efa-4edb-9202-c464d64fd38f
relation.isProjectOfPublication0fd00246-a4cc-46df-b54d-c56933693175
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