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Multi-decadal trends in Antarctic sea-ice extent driven by ENSO–SAM over the last 2,000 years

dc.rights.licenseopenen_US
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorCROSTA, Xavier
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorETOURNEAU, Johan
hal.structure.identifierNational University of Ireland Maynooth [Maynooth University]
dc.contributor.authorORME, Lisa
hal.structure.identifierEarth and Life Institute - Environmental Sciences [ELIE]
dc.contributor.authorDALAIDEN, Quentin
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorCAMPAGNE, Philippine
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorSWINGEDOUW, Didier
hal.structure.identifierEarth and Life Institute - Environmental Sciences [ELIE]
dc.contributor.authorGOOSSE, Hugues
hal.structure.identifierVariabilité à long terme du climat de l'océan [VALCO]
dc.contributor.authorMASSÉ, Guillaume
hal.structure.identifierNorwegian Polar Institute
dc.contributor.authorMIETTINEN, Arto
hal.structure.identifierAntarctic Climate and Ecosystems Cooperative Research Centre [ACE-CRC]
dc.contributor.authorMCKAY, Robert
hal.structure.identifierStanford University
dc.contributor.authorDUNBAR, Robert
hal.structure.identifierUniversidad de Granada = University of Granada [UGR]
dc.contributor.authorESCUTIA, Carlota
hal.structure.identifierCenter for Advanced Marine Core Research
dc.contributor.authorIKEHARA, Minoru
dc.date.accessioned2024-02-17T10:19:57Z
dc.date.available2024-02-17T10:19:57Z
dc.date.issued2021-03
dc.identifier.issn1752-0894en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/188227
dc.description.abstractEnAntarctic sea ice has paradoxically become more extensive over the past four decades despite a warming climate. The regional expression of this trend has been linked to changes in vertical redistribution of ocean heat and large-scale wind-field shifts. However, the short length of modern observations has hindered attempts to attribute this trend to anthropogenic forcing or natural variability. Here, we present two new decadal-resolution records of sea ice and sea surface temperatures that document pervasive regional climate heterogeneity in Indian Antarctic sea-ice cover over the last 2,000 years. Data assimilation of our marine records in a climate model suggests that the reconstructed dichotomous regional conditions were driven by the multi-decadal variability of the El Niño Southern Oscillation and Southern Annular Mode (SAM). For example, during an El Niño/SAM– combination, the northward sea-ice transport was reduced while heat advection from the subtropics to the Southern Ocean increased, which resulted in reduced sea-ice extent in the Indian sector as sea ice was compacted along the Antarctic coast. Our results therefore indicate that natural variability is large in the Southern Ocean and suggest that it has played a crucial role in the recent sea-ice trends and their decadal variability in this region.
dc.language.isoENen_US
dc.title.enMulti-decadal trends in Antarctic sea-ice extent driven by ENSO–SAM over the last 2,000 years
dc.title.alternativeNat. Geosci.en_US
dc.typeArticle de revueen_US
dc.identifier.doi10.1038/s41561-021-00697-1en_US
dc.subject.halPlanète et Univers [physics]/Sciences de la Terre/Climatologieen_US
dc.subject.halPlanète et Univers [physics]/Sciences de la Terre/Océanographieen_US
dc.subject.halPlanète et Univers [physics]/Océan, Atmosphèreen_US
dc.description.sponsorshipEuropeBlue-Action: Arctic impact on weather and climaten_US
bordeaux.journalNature Geoscienceen_US
bordeaux.page156-160en_US
bordeaux.volume14en_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.teamPALEOen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcehal
hal.identifierhal-03167472
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=Nature%20Geoscience&rft.date=2021-03&rft.volume=14&rft.issue=3&rft.spage=156-160&rft.epage=156-160&rft.eissn=1752-0894&rft.issn=1752-0894&rft.au=CROSTA,%20Xavier&ETOURNEAU,%20Johan&ORME,%20Lisa&DALAIDEN,%20Quentin&CAMPAGNE,%20Philippine&rft.genre=article


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