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Impacts of El Niño on the sediment balance of a transgressive dune-beach system

2025-10Artigo científico Acesso aberto
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datacite.subject.sdg13:Ação Climática
datacite.subject.sdg14:Proteger a Vida Marinha
datacite.subject.sdg11:Cidades e Comunidades Sustentáveis
dc.contributor.authorAlegría-Arzaburu, Amaia Ruiz de
dc.contributor.authorCostas, Susana
dc.contributor.authorDelgado-Fernández, Irene
dc.date.accessioned2026-03-17T18:32:30Z
dc.date.available2026-03-17T18:32:30Z
dc.date.issued2025-10
dc.description.abstractUnderstanding long-term evolution of sandy coasts requires in-depth analysis of the sediment balance from the shoreface to the beach and dune. While storms typically erode the subaerial beach, they can also contribute sediment from deeper waters to the coastal budget. Here, we explore the impacts of El Nino-driven ˜ storms on the sediment balance across the entire shore-beach-dune profile. Satellite-derived shorelines (1984–2020) were combined with sixty-six topo-bathymetric surveys (2014–2020), along a 1 km stretch of southern Ensenada beach (Baja California). Forcing conditions were characterized using hourly wave and wind data. Multi-decadal shoreline data reveal that high-energy El Nino ˜ events have led to punctuated landward coastline translation. Interannual topo-bathymetric surveys show an active 8 to 9.5 m-high dune ridge along the upper part of the profile, migrating landward at a rate of 5 m/yr. This migration gradually decoupled the dune from the beach, occasionally creating space across the dune toe area for the formation of incipient dunes that eventually merged with the main ridge. The sediment budget analysis indicates a one-way landward transfer of sediment from the winter-berm to the dune. Interestingly, the overall shore-beach-dune sand budget remained positively balanced, with an increase of ≈40 m3 /m related to sediment availability from deeper waters and onshore transport from the lower shoreface. Shoreline trends and sediment budgets illustrate a long-term transgressive system capable of maintaining sedimentary balance in the mid-term. Increased storm activity and sea-level rise are expected to accelerate beach-dune transgression, which could retain sediment balance if offshore inputs persist.eng
dc.description.sponsorshipCB-2014-238765; INFR-2013-205020; CEECINSTLA/00018/2022; UID/0350/2020
dc.identifier.doi10.1016/j.scitotenv.2025.180348
dc.identifier.issn0048-9697
dc.identifier.urihttp://hdl.handle.net/10400.1/28456
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.relationAligning Nature-based Solutions to coastal adaptation
dc.relationAquatic Research Infrastructure Network
dc.relation.ispartofScience of The Total Environment
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/
dc.subjectMorphodynamics
dc.subjectSediment transport
dc.subjectStorms
dc.subjectShoreline evolution
dc.subjectShoreface
dc.subjectBeachface
dc.titleImpacts of El Niño on the sediment balance of a transgressive dune-beach systemeng
dc.typejournal article
dspace.entity.typePublication
oaire.awardNumber2021.04286.CEECIND/CP1672/CT0001
oaire.awardNumberLA/P/0069/2020
oaire.awardTitleAligning Nature-based Solutions to coastal adaptation
oaire.awardTitleAquatic Research Infrastructure Network
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/CEEC IND4ed/2021.04286.CEECIND%2FCP1672%2FCT0001/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/LA%2FP%2F0069%2F2020/PT
oaire.citation.startPage180348
oaire.citation.titleScience of the Total Environment
oaire.citation.volume999
oaire.fundingStreamCEEC IND4ed
oaire.fundingStream6817 - DCRRNI ID
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameCostas
person.givenNameSusana
person.identifier1448818
person.identifier.ciencia-idAF19-9EEE-7550
person.identifier.orcid0000-0002-4005-077X
person.identifier.scopus-author-id9043656500
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
relation.isAuthorOfPublication62d73183-10ba-42ca-80a7-458c42d1375b
relation.isAuthorOfPublication.latestForDiscovery62d73183-10ba-42ca-80a7-458c42d1375b
relation.isProjectOfPublication61ec2c56-e33f-4586-a7e5-881c9f09915b
relation.isProjectOfPublication5af011f9-3888-449a-a18c-d08b59e87091
relation.isProjectOfPublication.latestForDiscovery61ec2c56-e33f-4586-a7e5-881c9f09915b

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