Quasi-3D Nearshore Circulation Equations: a CL-Vortex Force Formulation

摘要: INTRODUCTION Recently much attention has been paid to different formulations of surface wave force in wave-driven ocean and coastal circulations (e.g., McWilliams et al., 2004, Mellor, 2003, Smith, 2006 others). Basically, the analytical expressions for wave-current interaction can be classified into two types. One is classical ‘radiation stress’ concept presented by Longuet-Higgins Stewart (1962, 1964) many others depth-integrated short wave-averaged equations. Mellor (2003) recently used same derive 3-D equations with a depth-dependent wave-induced force. A direct application this kind was conducted Xia al. (2004) who related vertical variation current structure radiation stresses. Another type initially derived Garrett (1976) study Langmuir circulation generation. The driving forces include dissipation term vortex forcing which identified later Leibovich (1980) Smith as vertically integrated form ’CL vortex-force’ Craik (1976). Dingemans (1987) also similar formulation force, though refraction, that may result vortex-force term, recognized give insignificant contributions under conditions slowly varying fields. (2006) extended finite-depth effects provided some insight physical interpretation each