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

2009-11Artigo científico Acesso aberto
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dc.contributor.authorJensen, Mari F.
dc.contributor.authorNummelin, Aleksi
dc.contributor.authorNielsen, Soren B.
dc.contributor.authorSadatzki, Henrik
dc.contributor.authorSessford, Evangeline
dc.contributor.authorRisebrobakken, Bjorg
dc.contributor.authorAndersson, Carin
dc.contributor.authorVoelker, Antje
dc.contributor.authorRoberts, William H. G.
dc.contributor.authorPedro, Joel
dc.contributor.authorBorn, Andreas
dc.date.accessioned2018-12-07T14:57:54Z
dc.date.available2018-12-07T14:57:54Z
dc.date.issued2009-11
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 3040 kyr) using the proxy surrogate reconstruction method. Proxy data suggest a large variability in North Atlantic sea-surface 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 inter-stadials, 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 variability 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.
dc.description.sponsorshipEuropean Research Council under the European Community's Seventh Framework Programme/ERC [610055]; Centre for Climate Dynamics at the Bjerknes Centre
dc.description.sponsorshipFP7/2007–2013/ERC
dc.identifier.doi10.1016/j.aquaculture.2009.08.024
dc.identifier.issn1814-9324
dc.identifier.issn1814-9332
dc.identifier.urihttp://hdl.handle.net/10400.1/11755
dc.language.isoeng
dc.peerreviewedyes
dc.relationArctic Sea Ice and Greenland Ice Sheet Sensitivity
dc.subjectAbrupt climate change
dc.subjectMarine usotope stage-3
dc.subjectLast glacial period
dc.subjectGreenland ice core
dc.subjectPlanktonic foraminifera
dc.subjectCoupled climate
dc.subjectHeinrich events
dc.subjectPmip4 contribution
dc.subjectOcean circulation
dc.subjectLatitude climate
dc.titleA spatiotemporal reconstruction of sea-surface temperatures in the North Atlantic during Dansgaard-Oeschger events 5-8
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleArctic Sea Ice and Greenland Ice Sheet Sensitivity
oaire.awardURIinfo:eu-repo/grantAgreement/EC/FP7/610055/EU
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FMulti%2F04326%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/POCI/POCI%2FCLI%2F57752%2F2004/PT
oaire.citation.endPage291
oaire.citation.issue03-abr
oaire.citation.startPage284
oaire.citation.titleClimate of the Past
oaire.citation.volume296
oaire.fundingStreamFP7
oaire.fundingStream5876
oaire.fundingStreamPOCI
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/10.13039/501100008530
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameEuropean Commission
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccess
rcaap.typearticle
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relation.isAuthorOfPublication.latestForDiscoverybca80a86-eb35-4bca-a4ba-85b53831d69e
relation.isProjectOfPublication0fd00246-a4cc-46df-b54d-c56933693175
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