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New Arabian Sea records help decipher orbital timing of Indo-Asian monsoon

dc.rights.licenseopenen_US
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorCALEY, Thibaut
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorMALAIZE, Bruno
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorZARAGOSI, Sebastien
IDREF: 189039159
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorROSSIGNOL, Linda
dc.contributor.authorBOURGET, Julien
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorEYNAUD, Frederique
IDREF: 144113570
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorMARTINEZ, Philippe
IDREF: 154067628
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorGIRAUDEAU, Jacques
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorCHARLIER, Karine
dc.contributor.authorELLOUZ-ZIMMERMANN, Nadine
dc.date.accessioned2024-11-13T14:09:55Z
dc.date.available2024-11-13T14:09:55Z
dc.date.issued2011-01-01
dc.identifier.issn0012-821Xen_US
dc.identifier.urioai:crossref.org:10.1016/j.epsl.2011.06.019
dc.identifier.uriftunivadelaidedl:oai:digital.library.adelaide.edu.au:2440/66943
dc.identifier.urioai:researchgate.net:228480552
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/203240
dc.description.abstractEnA recent study suggested that Indian monsoonal proxies commonly used in the Arabian Sea, in general productivity proxies, could be impacted by changes in the Atlantic overturning rate (AMOC) throughout a control on the nutrient delivery into the euphotic zone. This oceanic mechanism could lead to a misunderstanding between the Indian summer monsoon (SM) and orbital forcing and could confuse a direct comparison with other archives derived from other monsoonal sub-systems (such as East-Asian or African records). Here we analyze three independent proxies (bromine, foraminifera assemblages and grain size) extracted from a marine sediment core (MD04-2861) covering the last 310 ka, and retrieved in the northern Arabian Sea near the Makran margin, an area influenced by summer and winter Indian monsoon. The grain size proxy deals with the regional continental climate through fluvial and eolian processes. It cannot be linked to changes in nutrient content of AMOC and present the same phase relationship (timing) than the other SM proxies. This demonstrates that the productivity signals (Bromine) in the northern Arabian Sea are mainly controlled by SM dynamics and not AMOC modulated nutrients at orbital scale changes. We thus build a multi-proxy record of SM variability (i.e. SM stack) using statistical tools (principal component analysis) further compiled on an age model constructed independently from orbital tuning. We find that strong SM lag by 9 ± 1 ka the NH summer insolation maximum (minimum of precession, June 21 perihelion and obliquity maximum) in the precession band, and by 6 ± 1.3 ka in the Obliquity band. These results are consistent with previous studies based on marine and terrestrial records in both Indian and Asian regions, except Asian speleothems. Our study supports the hypothesis that internal climate forcing (decreased ice volume together with the increase of latent heat export from the southern Indian Ocean) set the timing of strong Indo-Asian summer monsoons within both the precession and obliquity cycle. The external forcing (direct sensible heating) initiate monsoonal circulation. Strong Indian winter monsoon (WM) occurs between ice maxima and northern hemisphere sensible heat minima, indicating that both act to strengthen WM circulation. The summer and winter monsoons are in antiphase in the precession band suggesting that the two systems are dynamically linked.
dc.language.isoENen_US
dc.sourcecrossref
dc.sourcebase
dc.sourceresearchgate
dc.subject.ensummer/winter monsoon
dc.subject.enproductivity
dc.subject.enArabian Sea
dc.subject.entiming
dc.subject.enprecession
dc.subject.enobliquity
dc.title.enNew Arabian Sea records help decipher orbital timing of Indo-Asian monsoon
dc.typeArticle de revueen_US
dc.identifier.doi10.1016/j.epsl.2011.06.019en_US
dc.subject.halSciences de l'environnementen_US
bordeaux.journalEarth and Planetary Science Lettersen_US
bordeaux.page433-444en_US
bordeaux.volume308en_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.teamGEOLSEDen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcedissemin
hal.identifierhal-04780686
hal.version1
hal.date.transferred2024-11-13T14:10:00Z
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exporttrue
workflow.import.sourcedissemin
dc.rights.ccPas de Licence CCen_US
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Earth%20and%20Planetary%20Science%20Letters&rft.date=2011-01-01&rft.volume=308&rft.issue=3-4&rft.spage=433-444&rft.epage=433-444&rft.eissn=0012-821X&rft.issn=0012-821X&rft.au=CALEY,%20Thibaut&MALAIZE,%20Bruno&ZARAGOSI,%20Sebastien&ROSSIGNOL,%20Linda&BOURGET,%20Julien&rft.genre=article


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