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Ocean as the main driver of Antarctic ice sheet retreat during the Holocene

dc.rights.licenseopenen_US
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorCROSTA, Xavier
hal.structure.identifierDepartment of Earth and Planetary Sciences [Rehovot]
dc.contributor.authorCRESPIN, Julien
hal.structure.identifierCentre Européen de Recherche et de Formation Avancée en Calcul Scientifique [CERFACS]
dc.contributor.authorSWINGEDOUW, Didier
hal.structure.identifierLaboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE]
hal.structure.identifierGlaces et Continents, Climats et Isotopes Stables [GLACCIOS]
dc.contributor.authorMARTI, Olivier
hal.structure.identifierLaboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE]
hal.structure.identifierGlaces et Continents, Climats et Isotopes Stables [GLACCIOS]
dc.contributor.authorMASSON-DELMOTTE, Valérie
hal.structure.identifierInstituto Andaluz de Ciencias de la Tierra [IACT]
dc.contributor.authorETOURNEAU, Johan
hal.structure.identifierInstitut d'Astronomie et de Géophysique Georges Lemaître [UCL-ASTR]
dc.contributor.authorGOOSSE, Hugues
hal.structure.identifierLaboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] [LSCE]
hal.structure.identifierModelling the Earth Response to Multiple Anthropogenic Interactions and Dynamics [MERMAID]
dc.contributor.authorBRACONNOT, Pascale
hal.structure.identifierDepartment of Environmental Sciences and Energy Research [Rehovot]
dc.contributor.authorYAM, Ruth
dc.contributor.authorBRAILOVSKI, Irena
hal.structure.identifierDepartment of Environmental Sciences and Energy Research [Rehovot]
dc.contributor.authorSHEMESH, Aldo
dc.date.accessioned2024-04-24T10:04:04Z
dc.date.available2024-04-24T10:04:04Z
dc.date.issued2018
dc.identifier.issn0921-8181en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/199304
dc.description.abstractEnOcean-driven basal melting has been shown to be the main ablation process responsible for the recession of many Antarctic ice shelves and marine-terminating glaciers over the last decades. However, much less is known about the drivers of ice shelf melt prior to the short instrumental era. Based on diatom oxygen isotope (δ18Odiatom; a proxy for glacial ice discharge in solid or liquid form) records from western Antarctic Peninsula (West Antarctica) and Adélie Land (East Antarctica), higher ocean temperatures were suggested to have been the main driver of enhanced ice melt during the Early-to-Mid Holocene while atmosphere temperatures were proposed to have been the main driver during the Late Holocene. Here, we present a new Holocene δ18Odiatom record from Prydz Bay, East Antarctica, also suggesting an increase in glacial ice discharge since ~4500 years before present (~4.5 kyr BP) as previously observed in Antarctic Peninsula and Adélie Land. Similar results from three different regions around Antarctica thus suggest common driving mechanisms. Combining marine and ice core records along with new transient accelerated simulations from the IPSL-CM5A-LR climate model, we rule out changes in air temperatures during the last ~4.5 kyr as the main driver of enhanced glacial ice discharge. Conversely, our simulations evidence the potential for significant warmer subsurface waters in the Southern Ocean during the last 6 kyr in response to enhanced summer insolation south of 60°S and enhanced upwelling of Circumpolar Deep Water towards the Antarctic shelf. We conclude that ice front and basal melting may have played a dominant role in glacial discharge during the Late Holocene.
dc.language.isoENen_US
dc.title.enOcean as the main driver of Antarctic ice sheet retreat during the Holocene
dc.typeArticle de revueen_US
dc.identifier.doi10.1016/j.gloplacha.2018.04.007en_US
dc.subject.halPlanète et Univers [physics]/Océan, Atmosphèreen_US
dc.subject.halPlanète et Univers [physics]/Sciences de la Terre/Océanographieen_US
dc.subject.halPlanète et Univers [physics]/Sciences de la Terre/Climatologieen_US
bordeaux.journalGlobal and Planetary Changeen_US
bordeaux.page62-74en_US
bordeaux.volume166en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.institutionBordeaux INPen_US
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionCNRS
bordeaux.teamPALEOen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcehal
hal.identifierhal-02105534
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=Global%20and%20Planetary%20Change&rft.date=2018&rft.volume=166&rft.spage=62-74&rft.epage=62-74&rft.eissn=0921-8181&rft.issn=0921-8181&rft.au=CROSTA,%20Xavier&CRESPIN,%20Julien&SWINGEDOUW,%20Didier&MARTI,%20Olivier&MASSON-DELMOTTE,%20Val%C3%A9rie&rft.genre=article


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