Universidad Peruana Cayetano Heredia
Change in El Niño flavours over 1958-2008: Implications for the long-term trend of the upwelling off Peru
JavaScript is disabled for your browser. Some features of this site may not work without it.
Mostrar el registro sencillo del ítem
| dc.contributor.author | Dewitte, B. | |
| dc.contributor.author | Vazquez-Cuervo, J. | |
| dc.contributor.author | Goubanova, K. | |
| dc.contributor.author | Illig, S. | |
| dc.contributor.author | Takahashi, K. | |
| dc.contributor.author | Cambon, G. | |
| dc.contributor.author | Purca, S. | |
| dc.contributor.author | Correa, D. | |
| dc.contributor.author | Gutierrez Aguilar, Dimitri Alexey | |
| dc.contributor.author | Sifeddine, A. | |
| dc.contributor.author | Ortlieb, L. | |
| dc.date.accessioned | 2022-01-18T19:26:46Z | |
| dc.date.available | 2022-01-18T19:26:46Z | |
| dc.date.issued | 2012 | |
| dc.identifier.uri | https://hdl.handle.net/20.500.12866/10850 | |
| 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. | en_US |
| dc.language.iso | eng | |
| dc.publisher | Elsevier | |
| dc.relation.ispartofseries | Deep Sea Research. Part II, Topical Studies in Oceanography | |
| dc.rights | info:eu-repo/semantics/restrictedAccess | |
| dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es | |
| dc.subject | Peru | en_US |
| dc.subject | Climate Change | en_US |
| dc.subject | El Nino-Southern Oscillation | en_US |
| dc.subject | Pacific Ocean (Tropical) | en_US |
| dc.subject | Upwelling | en_US |
| dc.subject | Atmospheric Pressure | en_US |
| dc.subject | Climate Change | en_US |
| dc.subject | Coastal Upwelling | en_US |
| dc.subject | Coastal Zones | en_US |
| dc.subject | Cooling Systems | en_US |
| dc.subject | Cooling Trends|El Niño Modoki | en_US |
| dc.subject | Equatorial Kelvin Wave | en_US |
| dc.subject | Gravity Waves | en_US |
| dc.subject | High Resolution | en_US |
| dc.subject | Humboldt Current | en_US |
| dc.subject | Kelvin Waves | en_US |
| dc.subject | Long-Term Trend | en_US |
| dc.subject | Mesoscale Activity | en_US |
| dc.subject | Nickel Compounds | en_US |
| dc.subject | Numerical Model | en_US |
| dc.subject | Pacific Ocean (East) | en_US |
| dc.subject | Peru Undercurrent | en_US |
| dc.subject | Reanalysis | en_US |
| dc.subject | Regional Model | en_US |
| dc.subject | Sea Surface Temperature | en_US |
| dc.subject | Simple Ocean Data Assimilations | en_US |
| dc.subject | Southern Oscillation | en_US |
| dc.subject | SST Anomalies | en_US |
| dc.subject | Teleconnections | en_US |
| dc.subject | Vertical Structures | en_US |
| dc.subject | Wind Stress | en_US |
| dc.title | Change in El Niño flavours over 1958-2008: Implications for the long-term trend of the upwelling off Peru | en_US |
| dc.type | info:eu-repo/semantics/article | |
| dc.identifier.doi | https://doi.org/10.1016/j.dsr2.2012.04.011 | |
| dc.subject.ocde | https://purl.org/pe-repo/ocde/ford#1.05.11 | |
| dc.relation.issn | 0967-0645 |
Ficheros en el ítem
| Ficheros | Tamaño | Formato | Ver |
|---|---|---|---|
|
No hay ficheros asociados a este ítem. |
|||
Este ítem aparece en la(s) siguiente(s) colección(ones)
-
Artículos en revistas indizadas [4988]
Recuperados de bases de datos bibliográficas
Excepto si se señala otra cosa, la licencia del ítem se describe como info:eu-repo/semantics/restrictedAccess
