@article{fdi:010080228, title = {{R}ole of non-linear oceanic processes in the response to westerly wind events : new implications for the 1997 {E}l {N}ino onset}, author = {{B}oulanger, {J}ean-{P}hilippe and {D}urand, {E}. and {D}uvel, {J}.{P}. and {M}enk{\`e}s, {C}hristophe and {D}elecluse, {P}. and {L}engaigne, {M}athieu and {M}adec, {G}urvan and {M}asson, {S}.}, editor = {}, language = {{ENG}}, abstract = {{I}n {M}arch 1997, a strong westerly wind event ({WWE}) occurred in the western equatorial {P}acific prior to the 1997-1998 {EL} {N}ino event. {I}t produced downwelling {K}elvin 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}). {T}his 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 {E}l {N}ino conditions.}, keywords = {{CIRCULATION} {OCEANIQUE} ; {COURANT} ; {EL} {NINO} ; {VENT} ; {TEMPERATURE} {DE} {SURFACE} ; {ONDE} {KELVIN} ; {PACIFIQUE} ; {ZONE} {EQUATORIALE}}, booktitle = {}, journal = {{G}eophysical {R}esearch {L}etters}, volume = {28}, numero = {8}, pages = {1603--1606}, ISSN = {0094-8276}, year = {2003}, URL = {https://www.documentation.ird.fr/hor/fdi:010080228}, }