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Sea surface temperature in the Indian sector of the Southern Ocean over the Late Glacial and Holocene

dc.rights.licenseopenen_US
hal.structure.identifierNorwegian Polar Institute
hal.structure.identifierNational University of Ireland Maynooth [Maynooth University]
dc.contributor.authorORME, Lisa Claire
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorCROSTA, Xavier
hal.structure.identifierNorwegian Polar Institute
hal.structure.identifierHelsingin yliopisto = Helsingfors universitet = University of Helsinki
dc.contributor.authorMIETTINEN, Arto
hal.structure.identifierNorwegian Polar Institute
dc.contributor.authorDIVINE, Dmitry
hal.structure.identifierNorwegian Polar Institute
dc.contributor.authorHUSUM, Katrine
hal.structure.identifierNorwegian Polar Institute
dc.contributor.authorISAKSSON, Elisabeth
hal.structure.identifierEidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] [ETH Zürich]
dc.contributor.authorWACKER, Lukas
dc.contributor.authorMOHAN, Rahul
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorTHER, Olivier
hal.structure.identifierKochi University
dc.contributor.authorIKEHARA, Minoru
dc.date.accessioned2024-04-10T09:15:54Z
dc.date.available2024-04-10T09:15:54Z
dc.date.issued2020-08-07
dc.identifier.issn1814-9324en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/197402
dc.description.abstractEnCentennial-and millennial-scale variability of Southern Ocean temperature over the Holocene is poorly known, due to both short instrumental records and sparsely distributed high-resolution temperature reconstructions, with evidence for past temperature variations in the region coming mainly from ice core records. Here we present a high-resolution (∼ 60 year), diatom-based sea surface temperature (SST) reconstruction from the western Indian sector of the Southern Ocean that spans the interval 14.2 to 1.0 ka (cal-ibrated kiloyears before present). During the late deglacia-tion, the new SST record shows cool temperatures at 14.2-12.9 ka and gradual warming between 12.9 and 11.6 ka in phase with atmospheric temperature evolution. This supports the evolution of the Southern Ocean SST during the deglacia-tion being linked with a complex combination of processes and drivers associated with reorganisations of atmospheric and oceanic circulation patterns. Specifically, we suggest that Southern Ocean surface warming coincided, within the dating uncertainties, with the reconstructed slowdown of the Atlantic Meridional Overturning Circulation (AMOC), rising atmospheric CO 2 levels, changes in the southern westerly winds and enhanced upwelling. During the Holocene the record shows warm and stable temperatures from 11.6 to 8.7 ka followed by a slight cooling and greater variability from 8.7 to 1 ka, with a quasi-periodic variability of 200-260 years identified by spectral analysis. We suggest that the increased variability during the mid-to late Holocene reflects the establishment of centennial variability in SST connected with changes in the high-latitude atmospheric circulation and Southern Ocean convection.
dc.language.isoENen_US
dc.title.enSea surface temperature in the Indian sector of the Southern Ocean over the Late Glacial and Holocene
dc.typeArticle de revueen_US
dc.identifier.doi10.5194/cp-16-1451-2020en_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
bordeaux.journalClimate of the Pasten_US
bordeaux.page1451-1467en_US
bordeaux.volume16en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.issue4en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamPALEOen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcehal
hal.identifierhal-02913100
hal.version1
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exportfalse
workflow.import.sourcehal
dc.rights.ccCC BYen_US
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Climate%20of%20the%20Past&rft.date=2020-08-07&rft.volume=16&rft.issue=4&rft.spage=1451-1467&rft.epage=1451-1467&rft.eissn=1814-9324&rft.issn=1814-9324&rft.au=ORME,%20Lisa%20Claire&CROSTA,%20Xavier&MIETTINEN,%20Arto&DIVINE,%20Dmitry&HUSUM,%20Katrine&rft.genre=article


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