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The timing of the deglaciation in the Atlantic Iberian mountains: Insights from the stratigraphic analysis of a lake sequence in Serra da Estrela (Portugal)

2023Journal article Open access
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dc.contributor.authorHernández, Armand
dc.contributor.authorSáez, Alberto
dc.contributor.authorSantos, Ricardo N.
dc.contributor.authorRodrigues, Teresa
dc.contributor.authorMartin‐Puertas, Celia
dc.contributor.authorGil‐Romera, Graciela
dc.contributor.authorAbbott, Mark
dc.contributor.authorCarballeira, Rafael
dc.contributor.authorCosta, Pedro
dc.contributor.authorGiralt, Santiago
dc.contributor.authorGomes, Sandra D.
dc.contributor.authorGriffore, Melissa
dc.contributor.authorIbañez‐Insa, Jordi
dc.contributor.authorLeira, Manel
dc.contributor.authorMoreno, João
dc.contributor.authorNaughton, Filipa
dc.contributor.authorOliveira, Dulce
dc.contributor.authorRaposeiro, Pedro M.
dc.contributor.authorTrigo, Ricardo M.
dc.contributor.authorVieira, Gonçalo
dc.contributor.authorRamos, Alexandre M.
dc.date.accessioned2023-02-27T12:50:43Z
dc.date.available2023-02-27T12:50:43Z
dc.date.issued2023
dc.description.abstractUnderstanding the environmental response to the last glacial termination in regions located in transitional climate zones such as the Atlantic Iberian mountains is crucial to estimate potential changes in regions affected by current glacial melting. We present an 8.5 m-long, solid last deglaciation and Holocene chronostratigraphic record including detailed sediment analysis from Lake Peixao, a pro-glacial lake in the Serra da Estrela (Central Portugal). The age-depth model relies on a Bayesian approach that includes 16 AMS C-14 dates and Pb-210-(CS)-C-137 measurements, robustly dating the lake formation at 14.7 +/- 0.32 cal. ka BP. This chronological reconstruction shows an average sedimentation rate of ca. 0.07 cm yr(-1) (15 yr cm(-1)), enabling proxy analyses at decadal timescales. The sediment sequence is composed of five lithological units: (U1) coarse and unsorted fluvioglacial lacustrine deposits; (U2) massive fluvioglacial lacustrine deposits (863-790 cm below surface [bsf]; 14.7 +/- 0.32-13.8 +/- 0.12 cal. ka BP); (U3) water current fluvioglacial lacustrine deposits (790-766 cm bsf; 13.8 +/- 0.12-12.9 +/- 0.29 cal. ka BP); (U4) laminated/banded lacustrine deposits characterized by terrigenous deposits from ice-covered lake periods and episodic events of ice and snow melting (766-752 cm bsf; 12.9 +/- 0.29-11.7 +/- 0.15 cal. ka BP); and (U5) massive muddy lacustrine deposits (752-0 cm bsf; 11.7 +/- 0.15 cal. ka BP-present). The occurrence of U2 to U4 deposits defines the transition from glacial cold (U1) to net warm postglacial conditions (U5). These climate transitions are marked by changes in sediments and the presence of very low sedimentation rate periods, possibly related to the Intra-Allerod Cold Period and the coldest phase of the Younger Dryas. Our results support the previously proposed timing of the retreat of the Serra da Estrela glaciers ca. 13.8 +/- 0.12 cal. ka BP. The robust chronology of Lake Peixao highlights the potential of Iberian pro-glacial lakes for dating deglaciation processes and will lead to unprecedented decadal-to-centennial timescale palaeoclimate reconstructions in this region since the last glacial-interglacial transition.pt_PT
dc.description.sponsorshipFOR2358
dc.description.sponsorshipDL57/2016/ICETA/EEC2018/25
dc.description.sponsorshipRYC2020-029253-I
dc.description.sponsorshipUKRI-FLF MR/W009641/1
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1002/esp.5536pt_PT
dc.identifier.eissn1096-9837
dc.identifier.urihttp://hdl.handle.net/10400.1/19141
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherWileypt_PT
dc.relationNorth Atlantic Atmospheric Patterns influence on Western Iberia Climate: From the Lateglacial to the Present
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectClimate changept_PT
dc.subjectGeochronologypt_PT
dc.subjectHolocenept_PT
dc.subjectIberian Peninsulapt_PT
dc.subjectLake sedimentspt_PT
dc.subjectLate Glacialpt_PT
dc.subjectPalaeoclimatept_PT
dc.titleThe timing of the deglaciation in the Atlantic Iberian mountains: Insights from the stratigraphic analysis of a lake sequence in Serra da Estrela (Portugal)pt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleNorth Atlantic Atmospheric Patterns influence on Western Iberia Climate: From the Lateglacial to the Present
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FCTA-GEO%2F29029%2F2017/PT
oaire.citation.endPage242pt_PT
oaire.citation.issue2pt_PT
oaire.citation.startPage233pt_PT
oaire.citation.titleEarth Surface Processes and Landformspt_PT
oaire.citation.volume48pt_PT
oaire.fundingStream3599-PPCDT
person.familyNameNaughton
person.familyNameOliveira
person.givenNameFilipa
person.givenNameDulce
person.identifierR-000-JPJ
person.identifierR-001-TTY
person.identifier.ciencia-id1419-F239-1CEA
person.identifier.ciencia-idA119-CA60-3C50
person.identifier.orcid0000-0002-3055-9396
person.identifier.orcid0000-0002-3016-532X
person.identifier.ridE-7659-2013
person.identifier.ridH-9855-2018
person.identifier.scopus-author-id23009659300
person.identifier.scopus-author-id56688169500
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication53f17112-41aa-4bd9-a437-50736dbde6f9
relation.isAuthorOfPublicationa18515cc-4754-4270-b542-e01bc11347d8
relation.isAuthorOfPublication.latestForDiscoverya18515cc-4754-4270-b542-e01bc11347d8
relation.isProjectOfPublication7f9d178b-6cfa-4aa4-b1dd-abb286feb968
relation.isProjectOfPublication.latestForDiscovery7f9d178b-6cfa-4aa4-b1dd-abb286feb968

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