Three-dimensional numerical simulation of M<sub>2</sub> internal tides in the Luzon Strait

LI Bingtian; CAO Anzhou; LV Xianqing

doi:10.1007/s13131-015-0748-y

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Article Navigation > Acta Oceanologica Sinica > 2015 > 34(11): 55-62

LI Bingtian, CAO Anzhou, LV Xianqing. Three-dimensional numerical simulation of M2 internal tides in the Luzon Strait[J]. Acta Oceanologica Sinica, 2015, 34(11): 55-62. doi: 10.1007/s13131-015-0748-y

Citation:

LI Bingtian, CAO Anzhou, LV Xianqing. Three-dimensional numerical simulation of M₂ internal tides in the Luzon Strait[J]. Acta Oceanologica Sinica, 2015, 34(11): 55-62. doi: 10.1007/s13131-015-0748-y

LI Bingtian, CAO Anzhou, LV Xianqing. Three-dimensional numerical simulation of M2 internal tides in the Luzon Strait[J]. Acta Oceanologica Sinica, 2015, 34(11): 55-62. doi: 10.1007/s13131-015-0748-y

Citation:

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Three-dimensional numerical simulation of M₂ internal tides in the Luzon Strait

doi: 10.1007/s13131-015-0748-y

Key Laboratory of Physical Oceanography, Ocean University of China, Ministry of Education, Qingdao 266100, China

Received Date: 2015-03-19
Rev Recd Date: 2015-05-28

Abstract

Abstract

A three-dimensional isopycnic-coordinate internal tidal model is employed to investigate the generation, propagation, vertical structure and energy conversion of M₂ internal tides in the Luzon Strait (LS) with mooring observations. Simulated results, especially the tidal current amplitudes, agree well with observations, demonstrating the reasonability and accuracy of the model. Results indicate that M₂ internal tides mainly propagate into three directions horizontally, i.e., eastward towards the western Pacific Ocean, westward towards the Dongsha Island and southwestward towards the South China Sea Basin. In the horizontal direction, tidal current amplitudes decrease as distance increases away from the LS; in the vertical direction, they show an obvious decreasing tendency with depth. Between the double ridges of the LS, a clockwise gyre of M₂ baroclinic energy flux appears, which is caused by reflections of M₂ internal tides at supercritical topographies, and resonance of M₂ internal tides happens along 19.5° and 21.5°N due to the heights and separation distance of the double ridges. The total energy conversion in the LS is about 14.20 GW.
- internal tide,
- numerical simulation,
- Luzon Strait

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References(36)

References

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