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Identifying imprints of externally derived dust and halogens in the sedimentary record of an Iberian alpine lake for the past ∼13,500 years – Lake Peixão, Serra da Estrela (Central Portugal)

2023-12Journal article Restricted access
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dc.contributor.authorMoreno, J.
dc.contributor.authorRamos, A. M.
dc.contributor.authorRaposeiro, P. M.
dc.contributor.authorSantos, R. N.
dc.contributor.authorRodrigues, T.
dc.contributor.authorNaughton, F.
dc.contributor.authorMoreno, F.
dc.contributor.authorTrigo, R. M.
dc.contributor.authorIbañez-Insa, J.
dc.contributor.authorLudwig, P.
dc.contributor.authorShi, X.
dc.contributor.authorHernández, A.
dc.date.accessioned2023-11-07T10:50:42Z
dc.date.available2023-11-07T10:50:42Z
dc.date.issued2023-12
dc.description.abstractIberian lacustrine sediments are a valuable archive to document environmental changes since the last glacial termination, seen as key for anticipating future climate/environmental changes and their far-reaching implica -tions for generations to come. Herein, multi-proxy-based indicators of a mountain lake record from Serra da Estrela were used to reconstruct atmospheric (in)fluxes and associated climatic/environmental changes over the last similar to 13.5 ka. Depositions of long-range transported dust (likely from the Sahara) and halogens (primarily derived from seawater) were higher for the pre-Holocene, particularly in the late Bolling-Allerod-Younger Dryas period, compared to the Holocene. This synchronous increase could be related to a recognized dust-laden at-mosphere, along with the combined effect of (i) an earlier proposed effective transport of Sahara dust for higher latitudes during cold periods and (ii) the progressive Polar Front expansion southwards, with the amplification of halogen activation reactions in lower latitudes due to greater closeness to snow/sea ice (halide-laden) surfaces. Additionally, the orographic blocking of Serra da Estrela may have played a critical role in increasing precipi-tation of Atlantic origin at higher altitudes, with the presence of snow prompting physical and chemical processes involving halogen species. In the Late Holocene, the dust proxy records highlighted two periods of enhanced input to Lake Peixao, the first (similar to 3.5-2.7 ka BP) after the end of the last African Humid Period and the second, from the 19th century onwards, agreeing with the advent of commercial agriculture, and human contribution to land degradation and dust emission in the Sahara/Sahel region. The oceanic imprints throughout the Holocene matched well with North Atlantic rapid climatic changes that, in turn, coincided with ice-rafted debris or Bond events and other records of increased storminess for the European coasts. Positive parallel peaks in halogens were found in recent times, probably connected to fire extinction by halogenated alkanes and roadway de-icing.pt_PT
dc.description.sponsorshipSpanish Ministry of Science and Innovation through the Ramon y Cajal Scheme DL57/2016/ICETA/EEC2018/25, EMSO-PT infrastructure project RYC2020- 029253-I, Helmholtz "Changing Earth" program POCI-01-0145-FEDER-022157pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.scitotenv.2023.166179pt_PT
dc.identifier.eissn1879-1026
dc.identifier.urihttp://hdl.handle.net/10400.1/20134
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationNorth Atlantic Atmospheric Patterns influence on Western Iberia Climate: From the Lateglacial to the Present
dc.subjectLacustrine sedimentspt_PT
dc.subjectGeochemical proxiespt_PT
dc.subjectNorthern African dustpt_PT
dc.subjectWesterly Atlantic airflowpt_PT
dc.subjectLateglacial/Holocene transitionpt_PT
dc.subject(Hydro)climatic changespt_PT
dc.titleIdentifying imprints of externally derived dust and halogens in the sedimentary record of an Iberian alpine lake for the past ∼13,500 years – Lake Peixão, Serra da Estrela (Central 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.startPage166179pt_PT
oaire.citation.titleScience of The Total Environmentpt_PT
oaire.citation.volume903pt_PT
oaire.fundingStream3599-PPCDT
person.familyNameNaughton
person.givenNameFilipa
person.identifierR-000-JPJ
person.identifier.ciencia-id1419-F239-1CEA
person.identifier.orcid0000-0002-3055-9396
person.identifier.ridE-7659-2013
person.identifier.scopus-author-id23009659300
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication53f17112-41aa-4bd9-a437-50736dbde6f9
relation.isAuthorOfPublication.latestForDiscovery53f17112-41aa-4bd9-a437-50736dbde6f9
relation.isProjectOfPublication7f9d178b-6cfa-4aa4-b1dd-abb286feb968
relation.isProjectOfPublication.latestForDiscovery7f9d178b-6cfa-4aa4-b1dd-abb286feb968

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