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Combination of insolation and ice-sheet forcing drive enhanced humidity in northern subtropical regions during MIS 13

dc.rights.licenseopenen_US
dc.contributor.authorOLIVEIRA, Dulce
hal.structure.identifierÉcole Pratique des Hautes Études [EPHE]
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorDESPRAT, Stéphanie
dc.contributor.authorYIN, Qiuzhen
dc.contributor.authorRODRIGUES, Teresa
dc.contributor.authorNAUGHTON, Filipa
dc.contributor.authorTRIGO, Ricardo M.
dc.contributor.authorSU, Qianqian
dc.contributor.authorGRIMALT, Joan O.
dc.contributor.authorALONSO-GARCIA, Montserrat
dc.contributor.authorVOELKER, Antje H. L.
dc.contributor.authorABRANTES, Fátima
hal.structure.identifierÉcole Pratique des Hautes Études [EPHE]
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorSÁNCHEZ GOÑI, Maria Fernanda
dc.date.accessioned2024-02-05T16:49:54Z
dc.date.available2024-02-05T16:49:54Z
dc.date.issued2020
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/187850
dc.description.abstractEnMarine Isotope Stage (MIS) 13, ∼533-478 ka, has received particular attention due to the unexpected enhancement of monsoon systems under a cool climate characterized by lower atmospheric CO2 and larger ice volume than many other interglacials. Key questions remain about its regional expression (intensity, climate variability, length), and underlying forcing factors, in particular at the mid-latitudes. Here we examine the SW Iberian vegetation, terrestrial climate and sea surface temperature (SST) variability during MIS 13 by combining pollen and biomarker data from IODP Site U1385 with climate-model experiments. We show, for the first time, that despite strong precessional forcing, MIS 13 stands out for its large forest expansions with a reduced Mediterranean character alternating with muted forest contractions, indicating that this stage is marked by a cool-temperate climate regime with high levels of humidity. Results of our data-model comparison reveal that MIS 13 orbitally driven SW Iberian climate and vegetation changes are modulated by the relatively strong ice-sheet forcing. We find that the Northern Hemisphere ice-sheets prescribed at the MIS 13 climate optimum reinforce the insolation effect by increasing the tree fraction and both winter and summer precipitation. We propose that the interactions between ice-sheets and major atmospheric circulation systems may have resulted in the persistent influence of the mid-latitude cells over the SW Iberian region, which led to intensified moisture availability and reduced seasonality, and, in turn, to a pronounced expansion of the temperate forest.
dc.language.isoENen_US
dc.subject.enMid-Brunhes event
dc.subject.enInterglacial MIS 13
dc.subject.enMediterranean vegetation
dc.subject.enModel-data comparison
dc.subject.enInsolation
dc.subject.enIce-sheets
dc.title.enCombination of insolation and ice-sheet forcing drive enhanced humidity in northern subtropical regions during MIS 13
dc.typeArticle de revueen_US
dc.identifier.doi10.1016/j.quascirev.2020.106573en_US
dc.subject.halPlanète et Univers [physics]en_US
bordeaux.journalQuaternary Science Reviewsen_US
bordeaux.volume247en_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.identifierinsu-03678686
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=2020&rft.volume=247&rft.au=OLIVEIRA,%20Dulce&DESPRAT,%20St%C3%A9phanie&YIN,%20Qiuzhen&RODRIGUES,%20Teresa&NAUGHTON,%20Filipa&rft.genre=article


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