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

Hernández, Armand; Sáez, Alberto; Santos, Ricardo; Rodrigues, Teresa; Martin-Puertas, Celia; Gil-Romera, Graciela; Abbott, Mark; Carballeira, R.; Costa, Pedro; Giralt, Santiago; Gomes, Sandra; Griffore, Melissa P.; Ibañez-Insa, Jordi; Leira, M.; Moreno, João; Naughton, F.; Oliveira, Dulce; Raposeiro, Pedro M.; Trigo, R. M.; Vieira, Gonçalo; Ramos, Alexandre M.

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

Understanding 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...

Descripción completa

Detalles Bibliográficos
Autores:	Hernández, Armand, Sáez, Alberto, Santos, Ricardo, Rodrigues, Teresa, Martin-Puertas, Celia, Gil-Romera, Graciela, Abbott, Mark, Carballeira, R., Costa, Pedro, Giralt, Santiago, Gomes, Sandra, Griffore, Melissa P., Ibañez-Insa, Jordi, Leira, M., Moreno, João, Naughton, F., Oliveira, Dulce, Raposeiro, Pedro M., Trigo, R. M., Vieira, Gonçalo, Ramos, Alexandre M.
Tipo de recurso:	artículo
Estado:	Versión publicada
Fecha de publicación:	2023
País:	España
Institución:	Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:	DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:	oai:digital.csic.es:10261/349198
Acceso en línea:	http://hdl.handle.net/10261/349198
Access Level:	acceso abierto
Palabra clave:	Climate change Geochronology Holocene, Iberian Peninsula Lake sediments Late Glacial Palaeoclimate

id	ES_aa74b1d10a60c2cdd8a1feca4d9599a4
oai_identifier_str	oai:digital.csic.es:10261/349198
network_acronym_str	ES
network_name_str	España
repository_id_str
dc.title.none.fl_str_mv	The timing of the deglaciation in the Atlantic Iberian mountains: Insights from the stratigraphic analysis of a lake sequence in Serra da Estrela (Portugal)
title	The timing of the deglaciation in the Atlantic Iberian mountains: Insights from the stratigraphic analysis of a lake sequence in Serra da Estrela (Portugal)
spellingShingle	The timing of the deglaciation in the Atlantic Iberian mountains: Insights from the stratigraphic analysis of a lake sequence in Serra da Estrela (Portugal) Hernández, Armand Climate change Geochronology Holocene, Iberian Peninsula Lake sediments Late Glacial Palaeoclimate
title_short	The timing of the deglaciation in the Atlantic Iberian mountains: Insights from the stratigraphic analysis of a lake sequence in Serra da Estrela (Portugal)
title_full	The timing of the deglaciation in the Atlantic Iberian mountains: Insights from the stratigraphic analysis of a lake sequence in Serra da Estrela (Portugal)
title_fullStr	The timing of the deglaciation in the Atlantic Iberian mountains: Insights from the stratigraphic analysis of a lake sequence in Serra da Estrela (Portugal)
title_full_unstemmed	The timing of the deglaciation in the Atlantic Iberian mountains: Insights from the stratigraphic analysis of a lake sequence in Serra da Estrela (Portugal)
title_sort	The timing of the deglaciation in the Atlantic Iberian mountains: Insights from the stratigraphic analysis of a lake sequence in Serra da Estrela (Portugal)
dc.creator.none.fl_str_mv	Hernández, Armand Sáez, Alberto Santos, Ricardo Rodrigues, Teresa Martin-Puertas, Celia Gil-Romera, Graciela Abbott, Mark Carballeira, R. Costa, Pedro Giralt, Santiago Gomes, Sandra Griffore, Melissa P. Ibañez-Insa, Jordi Leira, M. Moreno, João Naughton, F. Oliveira, Dulce Raposeiro, Pedro M. Trigo, R. M. Vieira, Gonçalo Ramos, Alexandre M.
author	Hernández, Armand
author_facet	Hernández, Armand Sáez, Alberto Santos, Ricardo Rodrigues, Teresa Martin-Puertas, Celia Gil-Romera, Graciela Abbott, Mark Carballeira, R. Costa, Pedro Giralt, Santiago Gomes, Sandra Griffore, Melissa P. Ibañez-Insa, Jordi Leira, M. Moreno, João Naughton, F. Oliveira, Dulce Raposeiro, Pedro M. Trigo, R. M. Vieira, Gonçalo Ramos, Alexandre M.
author_role	author
author2	Sáez, Alberto Santos, Ricardo Rodrigues, Teresa Martin-Puertas, Celia Gil-Romera, Graciela Abbott, Mark Carballeira, R. Costa, Pedro Giralt, Santiago Gomes, Sandra Griffore, Melissa P. Ibañez-Insa, Jordi Leira, M. Moreno, João Naughton, F. Oliveira, Dulce Raposeiro, Pedro M. Trigo, R. M. Vieira, Gonçalo Ramos, Alexandre M.
author2_role	author author author author author author author author author author author author author author author author author author author author
dc.contributor.none.fl_str_mv	Fundação para a Ciência e a Tecnologia (Portugal) Ministerio de Ciencia y Tecnología (España) Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv	Climate change Geochronology Holocene, Iberian Peninsula Lake sediments Late Glacial Palaeoclimate
topic	Climate change Geochronology Holocene, Iberian Peninsula Lake sediments Late Glacial Palaeoclimate
description	Understanding 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 Peixão, 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 dates and Pb–CS 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 (15 yr cm), 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-Allerød 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 Peixão 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.
publishDate	2023
dc.date.none.fl_str_mv	2023 2024 2024 2024
dc.type.none.fl_str_mv	info:eu-repo/semantics/article http://purl.org/coar/resource_type/c_6501 Publisher's version info:eu-repo/semantics/publishedVersion
format	article
status_str	publishedVersion
dc.identifier.none.fl_str_mv	http://hdl.handle.net/10261/349198
url	http://hdl.handle.net/10261/349198
dc.language.none.fl_str_mv	Inglés
language_invalid_str_mv	Inglés
dc.relation.none.fl_str_mv	http://dx.doi.org/10.1002/esp.5536 Sí
dc.rights.none.fl_str_mv	info:eu-repo/semantics/openAccess
eu_rights_str_mv	openAccess
dc.publisher.none.fl_str_mv	John Wiley & Sons
publisher.none.fl_str_mv	John Wiley & Sons
dc.source.none.fl_str_mv	reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str	Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str	DIGITAL.CSIC. Repositorio Institucional del CSIC
collection	DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_	1869416182891675648
spelling	The timing of the deglaciation in the Atlantic Iberian mountains: Insights from the stratigraphic analysis of a lake sequence in Serra da Estrela (Portugal)Hernández, ArmandSáez, AlbertoSantos, RicardoRodrigues, TeresaMartin-Puertas, CeliaGil-Romera, GracielaAbbott, MarkCarballeira, R.Costa, PedroGiralt, SantiagoGomes, SandraGriffore, Melissa P.Ibañez-Insa, JordiLeira, M.Moreno, JoãoNaughton, F.Oliveira, DulceRaposeiro, Pedro M.Trigo, R. M.Vieira, GonçaloRamos, Alexandre M.Climate changeGeochronologyHolocene, Iberian PeninsulaLake sedimentsLate GlacialPalaeoclimateUnderstanding 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 Peixão, 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 dates and Pb–CS 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 (15 yr cm), 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-Allerød 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 Peixão 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.This work was supported by the Portuguese Foundation for Science and Technology – FCT, through the HOLMODRIVE project (PTDC/CTA-GEO/29029/2017). A. Hernandez is funded by the Spanish Ministry of Science and Innovation through the Ramón y Cajal Scheme [RYC2020-029253-I]. C. Martin-Puertas is funded by UKRI-FLF MR/W009641/1. G. Gil-Romera is funded by the DFG project FOR2358 ‘The Mountain Exile Hypothesis’. Pedro M. Raposeiro was funded by the Portuguese Science Foundation through contract DL57/2016/ICETA/EEC2018/25. Alexandre M. Ramos is funded by the Helmholtz ‘Changing Earth’ programme. Funding for open access charge: Universidade da Coruña/CISUG. The Estrela UNESCO Global Geopark is thanked for their support with field activities and permissions. The Parque Natural da Serra da Estrela (ICNF) provided research permits.John Wiley & SonsFundação para a Ciência e a Tecnologia (Portugal)Ministerio de Ciencia y Tecnología (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2024202420232024info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/349198reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1002/esp.5536Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3491982026-05-22T06:33:51Z
score	15,812429

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

Similares en LA Referencia