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首页> 外文期刊>Journal of oceanography >Development of a Semi-Spectral Coastal Ocean Model and Its Application to the Neko Seto Sea in the Seto Inland Sea
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Development of a Semi-Spectral Coastal Ocean Model and Its Application to the Neko Seto Sea in the Seto Inland Sea

机译：半光谱沿海海洋模型的建立及其在濑户内海濑户内海中的应用

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For studying coastal ocean processes, a new ocean model has been developed based on the semi-spectral method using three-dimensional primitive equations. The basic idea is that the vertical mode is used as a basis. As a first step in the development of the model, the Fourier cosine series is used as a basis by assuming that the reference density is homogeneous. To test the performance of the model, it has been applied to the regional model of the Neko Seto Sea in the Seto Inland Sea. The model result has been compared intensively with the observational result of acoustic Doppler current profiler (ADCP) on the eastern side of the Meneko Seto Strait. The model reproduced the realistic horizontal and vertical structure of the tidal current and vortices. The tidal current in Nigata Bay has been compared with a previous observational study. The generation process of the clockwise vortex at eastward flow is found to be different from the previous observational description. By using the vorticity analysis, it was found that the vortex stretching associated with the sloping bottom topography is essential to the generation of the counterclockwise vortex during eastward flow and the clockwise vortex during westward flow in Nigata Bay. On the other hand, the advection of vorticity from the edge-like coastal geometry is essential for the generation of the vortices on the eastern side of the Strait. However, the positive vorticity supply from tilting enhances the growth of the counterclockwise vortex, and is indispensable for reproducing its realistic position.
机译：为了研究沿海海洋过程，基于三维光谱方法，使用三维原始方程式开发了一种新的海洋模型。基本思想是将垂直模式用作基础。作为模型开发的第一步，假设参考密度是均质的，傅立叶余弦级数被用作基础。为了测试该模型的性能，已将其应用于濑户内海的濑户内海的区域模型。将模型结果与Meneko Seto海峡东侧的声学多普勒电流剖面仪（ADCP）的观测结果进行了深入对比。该模型再现了潮流和涡流的逼真的水平和垂直结构。新泻湾的潮流已与先前的观测研究进行了比较。发现向东流动的顺时针涡旋的产生过程不同于先前的观测描述。通过涡度分析，发现在新泻湾，向东流动时产生逆时针旋涡和向西流动时产生顺时针旋涡与底部倾斜的地形有关的旋涡拉伸是必不可少的。另一方面，边缘状沿海几何体的涡旋平流对于在海峡东侧产生涡旋至关重要。然而，来自倾斜的正涡旋供应增强了逆时针涡旋的增长，并且对于再现其实际位置是必不可少的。

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