Tide In The Bohai Sea Yellow Sea And East China Sea Within The Numerical Simulation

Internal tide is a low frequency internal wave with tide frequency. It is a very important physical process for studying total ocean energy budget and balance. Internal tide is an important component of ocean dynamic, which is significant not only in the research of the whole ocean dynamical environment, but also in exploiting and protecting the ocean environment and resource, and promoting the further research and development of other disciplines.The East China Sea and adjacent seas are one of the most significant generation regions of the internal tide in the world's oceans. In the present study, the data of seasonal averaged temperature and salinity NODC (Levitus) World Ocean Atlas 1998 was used to compute the density of the seawater and the point of the density's maximal gradients. Then an interface which agrees well with the realistic sea's layer is constructed. A nonlinear three-dimensional numerical model is used to simulate the distribution of the internal tide( M₂, S₂, K₁, O₁ )in the Bohai Sea, the Yellow Sea and the East China Sea.The result show that semidiurnal frequence internal tides mainly in two areas, one side of the west of Korean Peninsula waters, another is the north-east of Taiwan (Okinawa Haicao) waters. The first internal tides of strong local topography and tidal waves is the main feature of the decision; The latter internal tides of strong local is the main Kuroshio and the terrain affect. Diurnal frequence internal tides changes in season:Summer is mainly two areas : One is the east of Yangtze Delta and Hangzhou Bay, another is the north-east of Taiwan (Okinawa Haicao). The first internal tides of strong local topography and tidal waves is the main feature of the decision; The latter internal tides of strong local is the main Kuroshio and the terrain affect. Only a major regional distribution of winter, namely : Taiwan's northeast (Okinawa Haicao). The reason is that the strong winter wind and waves of the sea mixed enable layer deep change, most of China's BYECS winter sea is not stratified. However, the north-east of Taiwan-sea water layer is a perennial nature stratified (different from other sea seasonal stratified).The surface manifestation of the internal tides in the model is well agreement with...