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Dansgaard-Oeschger and Heinrich event temperature anomalies in the North Atlantic set by sea ice, frontal position and thermocline structure

2022Journal article Open access
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dc.contributor.authorPedro, J.B.
dc.contributor.authorAndersson, C.
dc.contributor.authorVettoretti, G.
dc.contributor.authorVoelker, Antje
dc.contributor.authorWaelbroeck, C.
dc.contributor.authorDokken, T.M.
dc.contributor.authorJensen, M.F.
dc.contributor.authorRasmussen, S.O.
dc.contributor.authorSessford, E.G.
dc.contributor.authorJochum, M.
dc.contributor.authorNisancioglu, K.H.
dc.date.accessioned2022-07-27T14:53:38Z
dc.date.available2022-07-27T14:53:38Z
dc.date.issued2022
dc.description.abstractWe use eighteen timescale-synchronised near-surface temperature reconstructions spanning 10-50 thousand years before present to clarify the regional expression of Dansgaard-Oeschger (D-O) and Heinrich (H) events in the North Atlantic. The North Atlantic Drift region shows D-O temperature variations of ca. 2-5?? with Greenland-like structure. The Western Iberian Margin region also shows Greenland-like structure, but with more pronounced surface cooling between interstadials and Heinrich stadials (ca. 6-9 ??C) than between interstadials and non-Heinrich stadials (ca. 2-3 ??C). The southern Nordic Seas show smaller D-O temperature anomalies (ca. 1-2 ??C) that appear out of phase with Greenland. These spatial patterns are replicated in a new global climate model simulation that features unforced (D-O-like) and freshwater forced (H-like) abrupt climate changes. The model simulations and observations suggest consistently that the spatial expression and amplitude of D-O and H event temperature anomalies are dominated by coupled changes in the Atlantic Meridional Overturning, sea ice extent, polar front position and thermocline structure. ?? 2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).pt_PT
dc.description.sponsorshipACCLIMATE/339108; ASCI000002
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.quascirev.2022.107599pt_PT
dc.identifier.eissn1873-457X
dc.identifier.urihttp://hdl.handle.net/10400.1/18117
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherPergamon - Elsevierpt_PT
dc.relationeu-repo/grantAgreement/EC/FP7/610055/EUpt_PT
dc.relationAlgarve Centre for Marine Sciences
dc.relationUnderstanding past short and long-term climate variations as guidelines for future climate change
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectDansgaard-Oeschger eventpt_PT
dc.subjectHeinrich eventpt_PT
dc.subjectAbrupt climate changept_PT
dc.subjectMarine sediment corept_PT
dc.subjectIce corept_PT
dc.subjectSea icept_PT
dc.titleDansgaard-Oeschger and Heinrich event temperature anomalies in the North Atlantic set by sea ice, frontal position and thermocline structurept_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleAlgarve Centre for Marine Sciences
oaire.awardTitleUnderstanding past short and long-term climate variations as guidelines for future climate change
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F04326%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/Investigador FCT/IF%2F01500%2F2014%2FCP1251%2FCT0003/PT
oaire.citation.startPage107599pt_PT
oaire.citation.titleQuaternary Science Reviewspt_PT
oaire.citation.volume289pt_PT
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStreamInvestigador FCT
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/10.13039/501100001871
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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