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Sub-Antartic glacier extensions in the Kerguelen region (49° S, Indian Ocean) over the past 24 000 years constrained by 36Cl moraine dating

dc.rights.licenseopenen_US
hal.structure.identifierLaboratoire de géographie physique : Environnements Quaternaires et Actuels [LGP]
dc.contributor.authorJOMELLI, Vincent
hal.structure.identifierLaboratoire de géographie physique : Environnements Quaternaires et Actuels [LGP]
dc.contributor.authorMOKADEM, Fatima
hal.structure.identifierCentre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement [CEREGE]
dc.contributor.authorSCHIMMELPFENNIG, Irene
hal.structure.identifierInstitut des Sciences de la Terre d'Orléans - UMR7327 [ISTO]
hal.structure.identifierGéographie de l'environnement [GEODE]
hal.structure.identifierBiogéosystèmes Continentaux - UMR7327
dc.contributor.authorCHAPRON, Emmanuel
hal.structure.identifierLaboratoire de géographie physique : Environnements Quaternaires et Actuels [LGP]
dc.contributor.authorRINTERKNECHT, Vincent
hal.structure.identifierInstitut des Géosciences de l’Environnement [IGE]
dc.contributor.authorFAVIER, Vincent
hal.structure.identifierInstitut des Géosciences de l’Environnement [IGE]
dc.contributor.authorVERFAILLIE, Deborah
hal.structure.identifierLaboratoire de géographie physique : Environnements Quaternaires et Actuels [LGP]
dc.contributor.authorBRUNSTEIN, Daniel
hal.structure.identifierLaboratoire de géographie physique : Environnements Quaternaires et Actuels [LGP]
dc.contributor.authorLEGENTIL, Claude
hal.structure.identifierLaboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE]
hal.structure.identifierPaléocéanographie [PALEOCEAN]
dc.contributor.authorMICHEL, Elisabeth
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorSWINGEDOUW, Didier
hal.structure.identifierL'Institut polaire français Paul-Emile Victor [IPEV]
dc.contributor.authorJAOUEN, Alain
hal.structure.identifierCentre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement [CEREGE]
dc.contributor.authorAUMAITRE, Georges
hal.structure.identifierCentre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement [CEREGE]
dc.contributor.authorBOURLES, Didier
hal.structure.identifierCentre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement [CEREGE]
dc.contributor.authorKEDDADOUCHE, Karim
dc.date.accessioned2024-09-16T09:31:10Z
dc.date.available2024-09-16T09:31:10Z
dc.date.issued2017
dc.identifier.issn0277-3791en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/201591
dc.description.abstractEnSimilar to many other regions in the world, glaciers in the southern sub-polar regions are currently retreating. In the Kerguelen islands (49°S, 69°E), the mass balance of the Cook Ice Cap (CIC), the largest ice cap in this region, experienced dramatic shrinking between 1960 and 2013 with retreat rates among the highest in the world. This observation needs to be evaluated in a long-term context. However, data on the past glacier extents are sparse in the sub-Antartic regions. To investigate the deglaciation pattern since the Last Glacial Maximum (LGM) period, we present the first 13 cosmogenic 36Cl surface exposure ages from four sites in the Kerguelen Islands. The 36Cl ages from erratic and moraine boulders span form 24.4 ± 2.7 ka to 0.3 ± 0.1 ka. We combined these ages with existing glacio-marine radiocarbon ages and bathymetric data to document the temporal and spatial changes of the island's glacial history. Ice began to retreat on the main island before 24.4±2.7 ka until around the time of the Antartic Cold Reversal (ACR) period (-14.5-12.9ka), during which the Bontemps moraine was formed by the advance of a CIC outlet glacier. Deglaciation continued during the Holocene probably until 3ka with evidence of minor advances during the last millennium. The chronology is in pace with major changes in ᵟ18O in a recent West Antarctica ice core record, showing thet Kerguelen Islands glciers are particularly sensitive and relevant to document climate change in the southern polar regions.
dc.description.sponsorshipPLATEFORME DE GEOCHIMIE ISOTOPIQUE ASTER/CEREGEen_US
dc.language.isoENen_US
dc.subject.enKerguelen
dc.subject.enHolocene
dc.subject.enGlacier fluctuations
dc.subject.enlate glacial
dc.subject.en36 cl cosmic-ray exposure dating
dc.title.enSub-Antartic glacier extensions in the Kerguelen region (49° S, Indian Ocean) over the past 24 000 years constrained by 36Cl moraine dating
dc.typeArticle de revueen_US
dc.identifier.doi10.1016/j.quascirev.2017.03.010en_US
dc.subject.halSciences de l'Homme et Société/Géographieen_US
dc.subject.halPlanète et Univers [physics]en_US
dc.subject.halPlanète et Univers [physics]/Interfaces continentales, environnementen_US
bordeaux.journalQuaternary Science Reviewsen_US
bordeaux.page128-144en_US
bordeaux.volume162en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamPALEOen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcehal
hal.identifierhal-01513579
hal.version1
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exportfalse
workflow.import.sourcehal
dc.rights.ccPas de Licence CCen_US
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Quaternary%20Science%20Reviews&rft.date=2017&rft.volume=162&rft.spage=128-144&rft.epage=128-144&rft.eissn=0277-3791&rft.issn=0277-3791&rft.au=JOMELLI,%20Vincent&MOKADEM,%20Fatima&SCHIMMELPFENNIG,%20Irene&CHAPRON,%20Emmanuel&RINTERKNECHT,%20Vincent&rft.genre=article


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