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Evaluating ice‐rafted debris as a proxy for glacier calving in Upernavik Isfjord, NW Greenland

dc.rights.licenseopenen_US
dc.contributor.authorVERMASSEN, Flor
hal.structure.identifierGeological Survey of Denmark and Greenland [GEUS]
dc.contributor.authorWANGNER, David
hal.structure.identifierGeological Survey of Denmark and Greenland [GEUS]
dc.contributor.authorDYKE, Laurence
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorSCHMIDT, Sabine
IDREF: 131836129
dc.contributor.authorCORDUA, Amalie
dc.contributor.authorKJÆR, Kurt
dc.contributor.authorHAUBNER, Konstanze
hal.structure.identifierGeological Survey of Denmark and Greenland [GEUS]
dc.contributor.authorANDRESEN, Camilla
dc.date.accessioned2024-01-24T10:14:30Z
dc.date.available2024-01-24T10:14:30Z
dc.date.issued2019-03-12
dc.identifier.issn0267-8179en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/187471
dc.description.abstractEnRecords of ice‐rafted debris (IRD) in sediments are commonly used as a proxy for iceberg production and to reconstruct past changes of glacier stability. However, the interpretation of IRD is complex as multiple processes modulate its variability. This study investigates the relationship between IRD variability and glaciological change by measuring IRD records from Upernavik Fjord and comparing these to frontal positions of Upernavik Isstrøm during the past century. Results show that the spatial variability of IRD deposition throughout the fjord is high, indicating that randomness inherent to IRD distorts the calving signal. However, we investigate whether IRD records can be combined to improve the reconstruction, as previously suggested, and show the importance of core site selection and number of cores on this approach. The outer‐fjord core compares relatively well to the observed front positions and this is reflected in the composite record: increased IRD deposition in 1937–1946, 1968–1980, and 1996–1999 occurred during periods of faster retreat. Comparison with climatic records shows that the calving episodes in the late ‘30 s/early ‘40 s and late ‘90 s are related to warm ocean and air temperatures, whereas intensified retreat and calving during the ‘70 s reflects partly an internal glacier response to the fjord geometry.
dc.language.isoENen_US
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/
dc.title.enEvaluating ice‐rafted debris as a proxy for glacier calving in Upernavik Isfjord, NW Greenland
dc.typeArticle de revueen_US
dc.identifier.doi10.1002/jqs.3095en_US
dc.subject.halSciences de l'environnementen_US
dc.subject.halSciences de l'environnement/Milieux et Changements globauxen_US
dc.subject.halPlanète et Univers [physics]/Interfaces continentales, environnementen_US
bordeaux.journalJournal of Quaternary Scienceen_US
bordeaux.page258-267en_US
bordeaux.volume34en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.issue3en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamSEDIMen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcehal
hal.identifierhal-02357292
hal.version1
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exportfalse
workflow.import.sourcehal
dc.rights.ccPas de Licence CCen_US
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