Ocean Upper Layer Mixing Processes due to Strong-Wind Forcing in 3D Ocean Model and Their Influences in Storm Surge

Abstract

Since major driving forces of storm surge are pressure depressions and wind stresses, a set of depth integrated equations is widely used for storm surge simulations. However, there are several phenomena which should be take into consideration additionally. This study estimates effects of wave radiation stress, vertical mixing and turbulent flux for 3D storm surge model. The effects of revised radiation stresses in the sigma coordinate and wave directional spread are evaluated into the numerical model. The numerical results give significant influences of the wave radiation stress and the turbulent flux on the surface elevation and the current in the stormy condition.