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Holocene land-sea climatic links on the equatorial Pacific coast (Bay of Guayaquil, Ecuador)

dc.rights.licenseopenen_US
dc.contributor.authorSEILLES, Brice
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorSANCHEZ GONI, Maria
IDREF: 057015627
dc.contributor.authorLEDRU, Marie-Pierre
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorURREGO, Dunia H.
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorMARTINEZ, Philippe
IDREF: 154067628
hal.structure.identifierEnvironnements et Paléoenvironnements OCéaniques [EPOC]
dc.contributor.authorHANQUIEZ, Vincent
dc.contributor.authorSCHNEIDER, Ralph
dc.date.accessioned2024-11-06T09:28:50Z
dc.date.available2024-11-06T09:28:50Z
dc.date.issued2015-10-27
dc.identifier.issn0959-6836en_US
dc.identifier.urihttps://www.researchgate.net/publication/283441111_Holocene_land-sea_climatic_links_on_the_equatorial_Pacific_coast_Bay_of_Guayaquil_Ecuador
dc.identifier.urioadoi:https://ore.exeter.ac.uk/repository/bitstream/10871/18307/1/Accepted2Sep2015HOL-15-0112.R1.pdf
dc.identifier.urioadoi:http://www.documentation.ird.fr/hor/fdi:010066734
dc.identifier.urioai:researchgate.net:283441111
dc.identifier.urioai:crossref.org:10.1177/0959683615612566
dc.identifier.uri25081206
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/203140
dc.description.abstractEnWe analyzed the pollen content of a marine core located near the Bay of Guayaquil in Ecuador to document the link between sea surface temperatures (SSTs) and changes in rainfall regimes on the adjacent continent during the Holocene. Based on the expansion/regression of five vegetation types, we observe three successive climatic patterns. In the first phase, between 11,700 and 7700 cal. yr BP, the presence of a cloud (Andean) forest in the mid altitudes and mangroves in the estuary of the Guayas basin, were associated with a maximum in boreal summer insolation, a northernmost position of the Intertropical Convergence Zone (ITCZ), a land–sea thermal contrast, cloud dripping, and dry edaphic conditions. Between 7700 and 2850 cal. yr BP, the expansion of the coastal vegetation and the regression of the mangrove indicate a drier climate with weak ITCZ and low El Niño Southern Oscillation (ENSO) variability while austral summer insolation gradually increased. The interval between 4200 and 2850 cal. yr BP was marked by the coolest and driest climatic conditions of the Holocene because of the weak influence of the ITCZ and a strengthening of the Humboldt Current. After 2850 cal. yr BP, high variability and amplitude of the Andean forest changes occurred when ENSO frequency and amplitude increased, indicating high variability in land–sea connections. The ITCZ reached the latitude of Guayaquil only after 2500 cal. yr BP inducing the bimodal precipitation regime we observe today. Our study shows that besides insolation, the ITCZ position, and ENSO frequency, changes in eastern equatorial Pacific SSTs play a major role in determining the composition of the ecosystems and the hydrological cycle of the Ecuadorian Pacific coast and the Western Cordillera in Ecuador.
dc.language.isoENen_US
dc.sourceoadoi_repo
dc.sourceresearchgate
dc.sourcecrossref
dc.sourceorcid
dc.subject.enEcuador
dc.subject.enEl Niño Southern Oscillation
dc.subject.enHolocene
dc.subject.enHumboldt Current
dc.subject.enIntertropical Convergence Zone
dc.subject.enPacific sea surface temperature
dc.subject.enWestern Cordillera
dc.title.enHolocene land-sea climatic links on the equatorial Pacific coast (Bay of Guayaquil, Ecuador)
dc.typeArticle de revueen_US
dc.identifier.doi10.1177/0959683615612566en_US
dc.subject.halSciences de l'environnementen_US
bordeaux.journalThe Holoceneen_US
bordeaux.page567-577en_US
bordeaux.volume26en_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.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcedissemin
hal.popularnonen_US
hal.audienceInternationaleen_US
hal.exportfalse
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=The%20Holocene&rft.date=2015-10-27&rft.volume=26&rft.issue=4&rft.spage=567-577&rft.epage=567-577&rft.eissn=0959-6836&rft.issn=0959-6836&rft.au=SEILLES,%20Brice&SANCHEZ%20GONI,%20Maria&LEDRU,%20Marie-Pierre&URREGO,%20Dunia%20H.&MARTINEZ,%20Philippe&rft.genre=article


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