The Research On The Generation And Propagation Mechanism Of Internal Solitary Waves In The Northeast Region Of Taiwan Island

The internal solitary waves in the northeast region of Taiwan Island are very rich and complicated observed from the SAR images. They are propagating in almost all directions. The paper focuses on the generation source region of the internal solitary waves and the generation mechanism of the internal solitary waves, and also studies the influence of the stratification, topography and tidal components on the generation of internal solitary waves. Then we can explain the complexity of the internalsolitary waves in this region.The MIT general circulation model (MITgcm) is employed to numerically study the generation of nonlinear internal waves in the northeast region of Taiwan Island. We have established a two-dimensional and a three-dimensional numerical simulation.Some numerical experiments are taken to study the influence of stratification, the K1 and O1 tidal components, and the topography on internal wave generation in the northeast region of Taiwan Island region. Through these numerical simulations, we can get the following conclusions:Modeling results show that the internal waves are generated when the barotropic current flow over a ridge. The role of f in the generation of the internal solitary waves in the northeast of Taiwan is small. The amplitude of internal solitary waves generatedin Winter are larger than that generated in Summer. The strength of O1 and K1 in this area is not large enough to generate the internal solitary waves. Most of the internal solitary waves generated near the Pengjia Islet, the southwest of Pengjia Islet, Mianhua Islet and Huaping Islet.