An interhemispheric tropical sea level seesaw due to El Niño Taimasa

摘要: AbstractDuring strong El Nino events, sea level drops around some tropical western Pacific islands by up to 20–30 cm. Such events (referred as taimasa in Samoa) expose shallow reefs, thereby causing severe damage associated coral ecosystems and contributing the formation of microatolls. During termination a southward movement weak trade winds development an anomalous anticyclone Philippine Sea are shown force interhemispheric seesaw that enhances prolongs extreme low levels southwestern Pacific. Spectral features, addition wind-forced linear water ocean model experiments, identify nonlinear interaction between annual cycle main cause these anomalies.