Role of non-linear oceanic processes in the response to westerly wind events: new implications for the 1997 El Niño onset - Université Pierre et Marie Curie Accéder directement au contenu
Article Dans Une Revue Geophysical Research Letters Année : 2001

Role of non-linear oceanic processes in the response to westerly wind events: new implications for the 1997 El Niño onset

Résumé

In March 1997, a strong westerly wind event (WWE) occurred in the western equatorial Pacific prior to the 1997-1998 E1 Nifio 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 E1 Nino conditions.
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Dates et versions

hal-00153877 , version 1 (25-01-2021)

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Jean-Philippe Boulanger, Edmée Durand, Jean-Philippe Duvel, Christophe E. Menkès, Pascale Delécluse, et al.. Role of non-linear oceanic processes in the response to westerly wind events: new implications for the 1997 El Niño onset. Geophysical Research Letters, 2001, 28 (8), pp.1603-1606. ⟨10.1029/2000GL012364⟩. ⟨hal-00153877⟩
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