Acoustic fields 1 Acoustic wave propagation 1 Approximate simulation 1 Dynamical process 1 Forecasting 1 Nonlinear internal wave 1 Regional ocean modeling 1 Salinity variations Sound propagation 1 Threedimensional (3-d) 1 Tides 1 Underwater acoustics 1 Underwater sound 1 acoustics 1 article 1 feeding 1 prediction 1 sea 1 simulation 1 sound 1