Boulanger Jean-Philippe, Durand E., Duvel J.P., Menkès Christophe, Delecluse P., Lengaigne Mathieu, Madec Gurvan, Masson S. (2003). Role of non-linear oceanic processes in the response to westerly wind events : new implications for the 1997 El Nino onset. Geophysical Research Letters, 28 (8), 1603-1606. ISSN 0094-8276.
Titre du document
Role of non-linear oceanic processes in the response to westerly wind events : new implications for the 1997 El Nino onset
Boulanger Jean-Philippe, Durand E., Duvel J.P., Menkès Christophe, Delecluse P., Lengaigne Mathieu, Madec Gurvan, Masson S.
Source
Geophysical Research Letters, 2003,
28 (8), 1603-1606 ISSN 0094-8276
In March 1997, a strong westerly wind event (WWE) occurred in the western equatorial Pacific prior to the 1997-1998 EL Nino event. It produced downwelling Kelvin waves that interacted non linearly with the surface temperature, salinity and zonal current fronts located at the eastern edge of the warm-fresh pool (EEWP). This non-linear interaction locally increased zonal currents by a factor of three compared to a theoretical linear response, and advected the EEWP at an unexpected rate (-l m/s) to which the ocean-atmosphere coupled system may have been responding rapidly to trigger El Nino conditions.
Plan de classement
Dynamique des eaux [032DYNEAU]
Descripteurs
CIRCULATION OCEANIQUE ; COURANT ; EL NINO ; VENT ; TEMPERATURE DE SURFACE ; ONDE KELVIN
