Mostrar el registro sencillo del ítem Dewitte, Boris Vazquez-Cuervo, J. Goubanova, Katerina Illig, Serena Takahashi, Ken Cambon, G. Purca, S. Correa, D. Gutierrez, D. Sifeddine, A. Ortlieb, L.
dc.coverage.spatial Perú 2018-09-21T10:28:53Z 2018-09-21T10:28:53Z 2012-11
dc.identifier.citation Dewitte, B., Vazquez-Cuervo, J., Goubanova, K., Illig, S., Takahashi, K., Cambon, G., ... Ortlieb, L. (2012). Change in El Nino flavours over 1958–2008: implications for the long-term trend of the upwelling off Peru.==$Deep Sea Research Part II: Topical Studies in Oceanography, 77-80$==(15), 143-156. es_ES
dc.identifier.govdoc index-oti2018
dc.description.abstract The tropical Pacific variability has experienced changes in its characteristics over the last decades. In particular, there is some evidence of an increased occurrence of El Niño events in the central Pacific (a.k.a. ‘Central Pacific El Niño’ (CP El Niño) or ‘El Niño Modoki’), in contrast with the cold tongue or Eastern Pacific (EP) El Niño which develops in the eastern Pacific. Here we show that the different flavours of El Niño imply a contrasted Equatorial Kelvin Wave (EKW) characteristic and that their rectification on the mean upwelling condition off Peru through oceanic teleconnection is changed when the CP El Niño frequency of occurrence increases. The Simple Ocean Data Assimilation (SODA) reanalysis product is first used to document the seasonal evolution of the EKW during CP and EP El Niño. It is shown that the strong positive asymmetry of ENSO (El Niño Southern Oscillation) is mostly reflected into the EKW activity of the EP El Niño whereas during CP El Niño, the EKW is negatively skewed in the eastern Pacific. Along with slightly cooler conditions off Peru (shallow thermocline) during CP El Niño, this is favourable for the accumulation of cooler SST anomalies along the coast by the remotely forced coastal Kelvin wave. Such a process is observed in a high-resolution regional model of the Humboldt Current system using the SODA outputs as boundary conditions. In particular the model simulates a cooling trend of the SST off Peru although the wind stress forcing has no trend. The model is further used to document the vertical structure along the coast during the two types of El Niño. It is suggested that the increased occurrence of the CP El Niño may also lead to a reduction of mesoscale activity off Peru. es_ES
dc.format application/pdf es_ES
dc.language.iso eng es_ES
dc.publisher Elsevier es_ES
dc.relation.ispartof urn:issn:0967-0645
dc.rights info:eu-repo/semantics/restrictedAccess es_ES
dc.subject El Niño Modoki es_ES
dc.subject Equatorial Kelvin wave es_ES
dc.subject Climate change es_ES
dc.subject Coastal upwelling es_ES
dc.subject Peru undercurrent es_ES
dc.title Change in El Niño flavours over 1958-2008: implications for the long-term trend of the upwelling off Peru es_ES
dc.type info:eu-repo/semantics/article es_ES
dc.subject.ocde es_ES
dc.subject.ocde es_ES
dc.subject.ocde es_ES
dc.identifier.journal Deep Sea Research Part II: Tropical Studies in Oceanography es_ES
dc.description.peer-review Por pares es_ES
dc.identifier.doi es_ES




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