Numerical study of M-2 internal tide generation and propagation in the Luzon Strait

作者：Li Huan; Song Dan; Chen Xueen^*; Qian Hongbao; Mu Lin; Song Jun

来源：Acta Oceanologica Sinica, 2011, 30(5): 23-32.

DOI：10.1007/s13131-011-0144-1

• M-2 internal tides
• HAMSOM
• Internal tidal energy flux
• Luzon Strait

Based on the z-coordinate ocean model HAMSOM, we introduced the internal-tide viscosity term and applied the model to numerically investigate the M2 internal tide generation and propagation in the Luzon Strait (LS). The results show that (1) in the upper 250 m depth, at the thermocline, the maximum amplitude of the generated internal tides in the LS can reach 40 m; (2) the major internal tides are generated to the northwest of Itbayat Island, the southwest of Batan Island and the northwest of the Babuyan Islands; (3) during the propagation the baroclinic energy scattering and reflection is obvious, which exists under the effect of the specific topography in the South China Sea (SCS); (4) the westward-propagating internal tides are divided into two branches entering the SCS. While passing through 118 degrees E, the major branch is divided into two branches again. The strongest internal tides in the LS are generated to the northwest of Itbayat Island and propagate northeastward to the Pacific. However, to the east of 122 degrees E, most of the internal tides propagate southeastward to the Pacific as a beam.

• 出版日期2011-9
• 单位中国科学院海洋研究所; 国家海洋信息中心; 中国海洋大学