La Niña-like conditions in the eastern equatorial Pacific and a stronger Choco jet in the northern Andes during the last glaciation

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dc.citation.journalTitlePaleoceanography
dc.contributor.authorMartínez, Ignaciospa
dc.contributor.authorKeigwin, Lloydspa
dc.contributor.authorBarrows T., Timothyspa
dc.contributor.authorYokoyama, Yusukespa
dc.contributor.authorSouthon, Johnspa
dc.contributor.departmentUniversidad EAFIT. Departamento de Geologíaspa
dc.contributor.eafitauthorMartínez, Ignacio (jimartin@eafit.edu.co)spa
dc.contributor.researchgroupCiencias del Marspa
dc.date.accessioned2012-09-28T16:29:12Z
dc.date.available2012-09-28T16:29:12Z
dc.date.issued2002-12-30
dc.description.abstractSix deep sea cores from the eastern equatorial Pacific (EEP) were analyzed for planktonic foraminifera and stable isotopes in order to reconstruct sea surface temperatures (SST) for the last 40 ka. South of the Equatorial Front the abundance of Globorotalia inflata increased, and SST decreased by >5°C (core ODP846B), creating a stronger SST meridional gradient and advection of the Peru Current than present for the ∼16–35 ka interval. A sharper SST meridional gradient forced stronger Choco jet events and a moisture increase in western Colombia, which supplied, through the San Juan River and the south-flowing equatorial and the Peru-Chile countercurrents, abundant hemipelagic quartz over the northern Peru basin (core TR163-31B). The Choco jet, and its associated mesoscale convective cells, provoked an increase in snow precipitation over the Central Cordillera of Colombia and the advance of the Murillo glacier. In synchrony with the intensified Choco jet events, the “dry island” effect over the Eastern Cordillera of Colombia intensified, and the level of Fuquene Lake dropped.eng
dc.identifier.citationMartínez, I., L. Keigwin, T. T. Barrows, Y. Yokoyama, and J. Southon (2003), La Niña-like conditions in the eastern equatorial Pacific and a stronger Choco jet in the northern Andes during the last glaciation, Paleoceanography, 18(2), 1033, doi:10.1029/2002PA000877.spa
dc.identifier.doi10.1029/2002PA000877
dc.identifier.issn0883-8305
dc.identifier.local551.64 N577
dc.identifier.urihttp://hdl.handle.net/10784/127
dc.language.isospaeng
dc.publisherAmerican Geophysical Union (AGU)
dc.relation.ispartofPaleoceanography, Volumen 18, Número 2, 2003. Pag.1033-1051.eng
dc.relation.uri10.1029/2002PA000877
dc.rights.accessrightsinfo:eu-repo/semantics/restrictedAccesseng
dc.rights.localAcceso restringidospa
dc.subject.ddcClimatology and weatherspa
dc.subject.ddcForecasting and forecasts of specific phenomenaspa
dc.subject.keywordPaleoceanographyeng
dc.subject.keywordGeomagnetismeng
dc.subject.keywordGlobal change climateeng
dc.subject.keywordAtmospheric phenomenaeng
dc.subject.keywordLa Niña phenomenaeng
dc.subject.keywordPaleoceanografíaspa
dc.subject.keywordGeomagnetismospa
dc.subject.keywordCambio climáticospa
dc.subject.keywordFenómenos artmosféricosspa
dc.subject.keywordFenómeno de La Niñaspa
dc.subject.lembGEOLOGIAspa
dc.subject.lembPALEOGRAFIAspa
dc.subject.lembOCEANOGRAFIAspa
dc.subject.lembCLIMATOLOGIAspa
dc.subject.lembMETEOROLOGIAspa
dc.subject.lembCALENTAMIENTO GLOBALspa
dc.titleLa Niña-like conditions in the eastern equatorial Pacific and a stronger Choco jet in the northern Andes during the last glaciationeng
dc.typeinfo:eu-repo/semantics/articleeng
dc.typearticleeng
dc.typeinfo:eu-repo/semantics/publishedVersioneng
dc.typepublishedVersioneng
dc.type.localArtículospa

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