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Causes of dust size variability in central East Antarctica (Dome B): Atmospheric transport from expanded South American sources during Marine Isotope Stage 2

dc.rights.licenseopenen_US
hal.structure.identifierDipartimento di Scienze dell'Ambiente e del Territorio [DISAT]
dc.contributor.authorDELMONTE, Barbara
dc.contributor.authorPALEARI, Chiara Ileana
hal.structure.identifierDipartimento di Scienze Geologiche e Geotecnologie
dc.contributor.authorANDÒ, Sergio
hal.structure.identifierDipartimento di Scienze Geologiche e Geotecnologie
dc.contributor.authorGARZANTI, Eduardo
dc.contributor.authorANDERSSON, Per Sune
hal.structure.identifierInstitut des Géosciences de l’Environnement [IGE]
dc.contributor.authorPETIT, Jean Robert
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorCROSTA, Xavier
hal.structure.identifierEnte per le Nuove Technologie, l'Energia e l'Ambiente [ENEA]
dc.contributor.authorNARCISI, Biancamaria
dc.contributor.authorBARONI, Carlo
dc.contributor.authorSALVATORE, Maria Cristina
dc.contributor.authorBACCOLO, Giovanni
dc.contributor.authorMAGGI, Valter
dc.date.accessioned2024-05-13T15:32:20Z
dc.date.available2024-05-13T15:32:20Z
dc.date.issued2017-07
dc.identifier.issn0277-3791en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/199800
dc.description.abstractEnMarine isotope stage 2 Micron-size particle Raman mineralogy a b s t r a c t We here investigate the spatial and temporal variability of eolian dust particle sorting recorded in the Dome B (77 05 0 S, 94 55' E) ice core, central East Antarctica, during Marine Isotope Stage (MIS) 2. We address the question whether such changes reflect variable transport pathways from a unique source area or rather a variable apportionment from diverse Southern Hemisphere sources transported at different elevation in the troposphere. The Sr-Nd radiogenic isotope composition of glacial dust samples as well as single-particle Raman mineralogy support the hypothesis of a single dust provenance both for coarse and fine mode dust events at Dome B. The southern South American provenance of glacial dust in Antarctica deduced from these results indicate a dust composition coherent with a mixture of volcanic material and minerals derived from metamorphic and plutonic rocks. Additionally, Dome B glacial samples contain aragonite particles along with diatom valves of marine benthic/epiphytic species and freshwater species living today in the northern Antarctic Peninsula and southern South America. These data suggest contribution from the exposed Patagonian continental shelf and glacial outwash plains of southern Patagonia at the time when sea level reached its minimum. Our results confirm that dust sorting is controlled by the relative intensity of the two main patterns of tropospheric dust transport onto the inner Plateau, i.e. fast low-level advection and long-range high-altitude transport including air subsidence over Antarctica.
dc.language.isoENen_US
dc.title.enCauses of dust size variability in central East Antarctica (Dome B): Atmospheric transport from expanded South American sources during Marine Isotope Stage 2
dc.typeArticle de revueen_US
dc.identifier.doi10.1016/j.quascirev.2017.05.009en_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.journalQuaternary Science Reviewsen_US
bordeaux.page55-68en_US
bordeaux.volume168en_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-02105539
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=2017-07&rft.volume=168&rft.spage=55-68&rft.epage=55-68&rft.eissn=0277-3791&rft.issn=0277-3791&rft.au=DELMONTE,%20Barbara&PALEARI,%20Chiara%20Ileana&AND%C3%92,%20Sergio&GARZANTI,%20Eduardo&ANDERSSON,%20Per%20Sune&rft.genre=article


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