Effects of Surface Gravity Waves on Coastal Currents: Implementation, Phenomenological Explanation, and Realistic Simulation with ROMS; Final rept. 1 Mar 2004-28 Feb 2008

摘要

Wave-current interaction is incorporated into the Regional Ocean Modeling System (ROMS) on the basis of the multi-scale asymptotic theory derived by McWilliams et al. (2004) using a vortex force formalism to investigate its importance in a wide range of coastal oceanic phenomena. The relationship between different wave-averaged current theories, in particular with a widely-used radiation stress formalism, is explored (Lane et al., 2007). A forced dissipative long-wave model is developed for generation and propagation of deep-ocean infragravity waves in conjunction with the excitation mechanism of Earth's seismic free oscillation on the ocean floor (Uchiyama and McWilliams, 2008). An investigation of shear instability due to breaking-wave- driven barotropic littoral currents on a barred beach is being carried out by extending the asymptotic theory appropriate for a strong current regime near surf zones with a parameterized, non-conservative wave breaking (Uchiyama et al., 2008).