The Central Pacific El Niño intraseasonal Kelvin wave

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dc.contributor.authorMosquera Vásquez, Kobi Alberto
dc.contributor.authorDewitte, Boris
dc.contributor.authorIllig, Serena
dc.date.accessioned2018-09-12T11:14:40Z
dc.date.available2018-09-12T11:14:40Z
dc.date.issued2014-10
dc.description.abstractIn this study, we document and interpret the characteristics of the IntraSeasonal Kelvin wave (ISKw) in the Pacific over the 1989–2011 period, based on observations, a linear model, and the outputs of an Ocean General Circulation Model (OGCM). We focus on the wave activity during the Central Pacific (CP) El Niño events contrasting with the extraordinary El Niño of 1997/1998. We find that the ISKw activity is enhanced in Austral summer (spring) in the central Pacific (west of ∼120°W) during CP El Niño events. The linear model experiment indicates that the Austral summer peak is wind‐forced, while the Austral spring peak is not and consequently results from nonlinear processes. In addition, a strong dissipation of the ISKws is observed east of 120°W which cannot be accounted for by a linear model using a Rayleigh friction. A vertical and horizontal mode decomposition of the OGCM simulation further confirms the sharp changes in characteristics of the ISKws as well as the reflection of the latter into first‐meridional Rossby wave at the longitude where the maximum zonal gradient of the thermocline is found (∼120°W). Our analysis suggests that the confinement of CP El Niño warming in the central Pacific may result from the reinforcement of the zonal gradient in stratification associated with the La Niña‐like conditions since the late of the 1990s, leading to scattering of the energy of the ISKws in the eastern Pacific.es_ES
dc.description.peer-reviewPor pareses_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationMosquera‐Vásquez, K., Dewitte, B., & Illig, S. (2014). The Central Pacific El Niño intraseasonal Kelvin wave.==$Journal of Geophysical Research: Oceans, 119$==(10), 6605-6621. https://doi.org/10.1002/2014JC010044es_ES
dc.identifier.doihttps://doi.org/10.1002/2014JC010044es_ES
dc.identifier.govdocindex-oti2018
dc.identifier.journalJournal of Geophysical Research: Oceanses_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/2928
dc.language.isoenges_ES
dc.publisherAmerican Geophysical Union (AGU)es_ES
dc.relation.ispartofurn:issn:2169-9275
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.rights.uri(c) American Geophysical Uniones_ES
dc.subjectCentral Pacific El Niñoes_ES
dc.subjectIntraseasonal Rossby wavees_ES
dc.subjectIntraseasonal Kelvin wavees_ES
dc.subjectENSOes_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.00es_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.09es_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.11es_ES
dc.titleThe Central Pacific El Niño intraseasonal Kelvin wavees_ES
dc.typeinfo:eu-repo/semantics/articlees_ES

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