Numerical simulation of flow around a tall isolated seamount. Part II: resonant generation of trapped waves

Abstract

A sigma-coordinate, primitive equation ocean circulation model is used to explore the problem of the resonant generation of trapped waves about a tall, circular, isolated seamount by an incident oscillatory barotropic current. The numerical solutions are used to extend prior studies into the fully nonlinear regime, and in particular to quantify and interpret the occurrence of residual circulation. Specific attention is also devoted to the dependence of the resonance and rectification mechanisms on stratification, forcing frequency, and choice of subgrid-scale viscous closure. -from Authors