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Lateglacial and Holocene chronology of climate‐driven postglacial landscape evolution in northeast Greenland

2024Artigo científico Acesso aberto
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dc.contributor.authorGarcia‐Oteyza, Julia
dc.contributor.authorOliva, Marc
dc.contributor.authorPalacios, David
dc.contributor.authorFernández‐Fernández, Jose Maria
dc.contributor.authorSchimmelpfennig, Irene
dc.contributor.authorFernandes, Marcelo
dc.contributor.authorGiralt, Santiago
dc.contributor.authorAntoniades, Dermot
dc.contributor.authorJomelli, Vincent
dc.date.accessioned2024-12-27T14:26:09Z
dc.date.available2024-12-27T14:26:09Z
dc.date.issued2024
dc.description.abstractThe Greenland Ice Sheet is highly sensitive to climate change, leading to significant retreat along its edges. This rapid ice loss contributes to rising sea levels and impacts the Earth’s climate stability. Understanding the extent of recent glacier retreat is crucial in order to determine if it is unprecedented or within ranges of natural variability. Palaeoenvironmental studies aim to identify past glacial phases and landscape changes using advanced dating methods such as cosmic ray exposure (CRE) dating. In NE Greenland, CRE dating has helped establish the timing of glacial oscillations, yet a comprehensive understanding of glacial fluctuations during specific periods still needs to be developed. This study aims to chronologically constrain the postglacial landscape evolution of two NE Greenland valleys from the Young Sund–Tyrolerfjord area (74°N, 20–25°E) from the onset of deglaciation and throughout the Holocene to better understand glacial and postglacial changes. The chronological framework relies on 27 10Be cosmic-ray exposure ages that constrain our interpretation of the geomorphological features in both valleys. Inconsistencies were observed in the ages dataset, highlighting potential bias associated with nuclide inheritance and post-glacial dynamics. Despite limitations, the CRE results confirm the general pattern observed in NE Greenland: (i) major deglaciation and disconnection of glaciers from the main glacial systems during the Lateglacial and Early Holocene with a rapid but not homogeneous deglaciation within the range from ~14.3 to 11.9 ka; (ii) no evidence of glacial activity during theMiddleHolocene, probably associatedwith the withdrawn position of theicemasses’fronts; and (iii) glacier expansion during the Late Holocene, with a Little Ice Age advance as the last significant period of glacial regrowth.pt_PT
dc.description.versioninfo:eu-repo/semantics/acceptedVersionpt_PT
dc.identifier.citationGarcia-Oteyza, J., Oliva, M., Palacios, D., Fernández-Fernández, J.M., Schimmelpfennig, I., Fernandes, M., Giralt, S., Antoniades, D., & Jomelli, V. (2024). Lateglacial and Holocene chronology of climate-driven postglacial landscape evolution in northeast Greenland. Boreas, 54(1), 105-124. https://doi.org/10.1111/bor.12683pt_PT
dc.identifier.doi10.1111/bor.12683pt_PT
dc.identifier.issn0300-9483
dc.identifier.urihttp://hdl.handle.net/10400.5/96713
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherWileypt_PT
dc.relationNEOGREEN (PID2020-113798GB-C31)pt_PT
dc.relationPALEOGREEN (CTM2017-87976-P)pt_PT
dc.relationANTALP (Antarctic, Arctic, Alpine Environments; 2017-SGR-1102)pt_PT
dc.relation.publisherversionhttps://onlinelibrary.wiley.com/doi/epdf/10.1111/bor.12683pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectLateglacialpt_PT
dc.subjectHolocenept_PT
dc.subjectPostglacial landscapept_PT
dc.subjectClimatept_PT
dc.subjectNortheast Greenlandpt_PT
dc.titleLateglacial and Holocene chronology of climate‐driven postglacial landscape evolution in northeast Greenlandpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage124
oaire.citation.issue1
oaire.citation.startPage105
oaire.citation.titleBoreaspt_PT
oaire.citation.volume54
person.familyNameOliva
person.familyNameVieira Fernandes
person.givenNameMarc
person.givenNameMarcelo
person.identifierhttps://www.researchgate.net/profile/Marcelo-Fernandes-11
person.identifier.ciencia-id5510-AC71-085A
person.identifier.ciencia-idDC16-4FD0-6F5B
person.identifier.orcid0000-0001-6521-6388
person.identifier.orcid0000-0001-6840-4317
person.identifier.ridK-5423-2014
person.identifier.scopus-author-id35225198700
person.identifier.scopus-author-idhttps://www.scopus.com/authid/detail.uri?authorId=57204148423
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationd416bf65-77f6-488e-b275-5fbb257df6d4
relation.isAuthorOfPublication3b138e07-7c52-4576-a5c2-d8c8e22965d5
relation.isAuthorOfPublication.latestForDiscovery3b138e07-7c52-4576-a5c2-d8c8e22965d5

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