Study Of Global Ocean And China Coastal Tide Based On The Variable Grid Model System

In this paper a Global Ocean and China Sea Interaction Model (GOCSIM) with varying unconstructured grids was developed based on finite-volume model to study global ocean tide and China coastal sea tide. The model takes advantage of the geometric flexibility of unstructured triangular mesh system, using a realistic global topography which includes also Arctic. Thus, there is no open boundary condition to be considered. The first six partial tides were included as ephemeredes forcing, furthermore, the model is fully baroclinic and 3-dimensional.As a general application, the model is first applied to the East-Chinese Shelf, where includes Bohai Sea, Huanghai Sea and the East China Sea, and where has many marginal seas, channels and islands. In this application the model grids are globally refined over coastal areas, marginal seas and Channels, especially those of the East-Chinese Shelf. GOCSIM is initialized by WOA05 climatological ocean temperature and salinity data, driven by surface heat flux and surface wind stress.Analyze of the model results indicates that GOCSIM well reproduced the realistic global tidal harmonic constants. GOCSIM provides a robust model to survey the interaction of global ocean and the coastal waters, by which we may easier study the dynamic system and the Ecosystem of the western Pacific under the climate changes induced by the global warming.