Numerical study of M2 internal tide generation and propagation in the Luzon Strait |
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| Authors: | LI Huan SONG Dan CHEN Xueen QIAN Hongbao MU Lin and SONG Jun |
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| Institution: | 1.National Marine Data and Information Service, State Oceanic Administration, Tianjin 300171, China2.Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China3.College of Physical and Environmental Oceanography, Ocean University of China, Qingdao 266100, China4.Administrative Center for China's Agenda 21, Beijing 100038, China |
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| Abstract: | 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°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°E, most of the internal tides propagate southeastward to the Pacific as a beam. |
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| Keywords: | M2 internal tides HAMSOM Internal tidal energy flux Luzon Strait |
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