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Muted cooling and drying of NW Mediterranean in response to the strongest last glacial North American ice surges

dc.rights.licenseopenen_US
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
hal.structure.identifierÉcole Pratique des Hautes Études [EPHE]
dc.contributor.authorSANCHEZ GONI, Maria Fernanda
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
hal.structure.identifierIRAMAT-Centre de recherche en physique appliquée à l’archéologie [IRAMAT-CRP2A]
dc.contributor.authorFOURCADE, Tiffanie
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorSALONEN, Sakari
hal.structure.identifierÉcole Pratique des Hautes Études [EPHE]
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorLESVEN, Jonathan
hal.structure.identifierGeosciencies Barcelona [GEO3BCN]
dc.contributor.authorFRIGOLA, Jaime
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorSWINGEDOUW, Didier
hal.structure.identifierUniversidad de Salamanca
dc.contributor.authorSIERRO, Francisco Javier
dc.date.accessioned2024-03-04T09:08:49Z
dc.date.available2024-03-04T09:08:49Z
dc.date.issued2021-03-01
dc.identifier.issn0016-7606en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/188544
dc.description.abstractEnAbstract The massive North Atlantic iceberg discharges of the last glacial period, the so-called Heinrich events (HE), resulted in atmospheric and oceanic responses of the Mediterranean region that remain poorly documented and understood. This paper focuses on the climatic phases termed Heinrich stadials (HS) 4 and 5 generated by the HE 4 and 5 that occurred during a period of similar intermediate global ice volume and greenhouse gas concentrations but with different iceberg discharges and orbital boundary conditions. Our comparison of sea surface temperature and salinity changes with deep water conditions in the Gulf of Lions (planktonic and benthic foraminifera δ18O and δ13C records) and regional pollen-based temperature and precipitation reconstructions in NW Mediterranean for these Heinrich stadials reveal a paradoxical situation. A lower North American iceberg discharge during HS 5 compared to HS 4 is associated with colder and drier conditions in the NW Mediterranean borderlands. During the moderate iceberg discharge of HS 5 a relatively high salinity in the Gulf of Lions lead to stronger Western Mediterranean Deep Water formation and mixing of the surface with the deeper layers. By contrast during HS 4, we suggest that the massive North Atlantic iceberg break-up decreased the salinity of the Gulf of Lions and reduced the wind stress in the Mediterranean, leading to the stratification of the Mediterranean water column and inducing limited upward mixing of cold water, resulting in regional atmospheric warming and wetting compared to HS 5. This work highlights the potential crucial role of local processes in modulating the regional response to a global climate change related with ice-sheet instabilities.
dc.language.isoENen_US
dc.title.enMuted cooling and drying of NW Mediterranean in response to the strongest last glacial North American ice surges
dc.title.alternativeGeol. Soc. Amer. Bull.en_US
dc.typeArticle de revueen_US
dc.identifier.doi10.1130/B35736.1en_US
dc.subject.halPlanète et Univers [physics]/Sciences de la Terre/Climatologieen_US
dc.subject.halPlanète et Univers [physics]/Sciences de la Terreen_US
bordeaux.journalGeological Society of America Bulletinen_US
bordeaux.page451-460en_US
bordeaux.volume133en_US
bordeaux.hal.laboratoriesEPOC : Environnements et Paléoenvironnements Océaniques et Continentaux - UMR 5805en_US
bordeaux.issue3-4en_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.institutionCNRSen_US
bordeaux.teamPALEOen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcehal
hal.identifierhal-03351458
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=Geological%20Society%20of%20America%20Bulletin&rft.date=2021-03-01&rft.volume=133&rft.issue=3-4&rft.spage=451-460&rft.epage=451-460&rft.eissn=0016-7606&rft.issn=0016-7606&rft.au=SANCHEZ%20GONI,%20Maria%20Fernanda&FOURCADE,%20Tiffanie&SALONEN,%20Sakari&LESVEN,%20Jonathan&FRIGOLA,%20Jaime&rft.genre=article


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