[ACG38-P06] Contribution of oceanic wave propagation from the tropical Pacific to asymmetry of the Ningaloo Nino/Nina
Keywords:Ningaloo Nino, Regional ocean modeling system, El Nino/Southern Oscillation, coastal Kelvin wave
Using a regional ocean modeling system (ROMS), the contribution of oceanic wave propagation to the amplitude and asymmetry of SST anomalies associated with the Ningaloo Nino/Nina is investigated. For these purposes, a sensitivity experiment in which oceanic lateral boundary conditions are replaced by the monthly climatology is conducted. The results suggest that downwelling (upwelling) Kelvin waves from the western tropical Pacific associated with La Nina (El Nino) that often co-occur with Ningaloo Nino (Nina) are stronger (weaker) and contribute to the asymmetry.