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Effects of internal tidal dissipation and self-attraction and loading on semidiurnal tides in the Bohai Sea, Yellow Sea and East China Sea: a numerical study

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Abstract

A parameterized internal tide dissipation term and self-attraction and loading (SAL) tide term are introduced in a barotropic numerical model to investigate the dynamics of semidiurnal tidal constituents M 2 and S 2 in the Bohai Sea, Yellow Sea and East China Sea (BYECS). The optimal parameters for bottom friction and internal dissipation are obtained through a series of numerical computations. Numerical simulation shows that the tide-generating force contributes 1.2% of M 2 power for the entire BYECS and up to 2.8% for the East China Sea deep basin. SAL tide contributes 4.4% of M 2 power for the BYECS and up to 9.3% for the East China Sea deep basin. Bottom friction plays a major role in dissipating tidal energy in the shelf regions, and the internal tide effect is important in the deep water regions. Numerical experiments show that artificial removal of tide-generating force in the BYECS can cause a significant difference (as much as 30 cm) in model output. Artificial removal of SAL tide in the BYECS can cause even greater difference, up to 40 cm. This indicates that SAL tide should be taken into account in numerical simulations, especially if the tide-generating force is considered.

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Acknowledgments

We are grateful to two anonymous reviewers for constructive comments and suggestions on an earlier version of this manuscript.

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Authors and Affiliations

  1. Ocean University of China, Qingdao, 266100, China

    Fei Teng  (滕飞) & Guohong Fang  (方国洪)

  2. The First Institute of Oceanography, State Oceanic Administration, Qingdao, 266061, China

    Guohong Fang  (方国洪) & Xiaoqing Xu  (徐晓庆)

Authors
  1. Fei Teng  (滕飞)
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  2. Guohong Fang  (方国洪)
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  3. Xiaoqing Xu  (徐晓庆)
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Corresponding author

Correspondence to Guohong Fang  (方国洪).

Additional information

Supported by the National Natural Science Foundation of China (Nos. 40676009, 40606006) and the Qingdao Science and Technology Basic Research Program (No. 11-1-4-98-jch)

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Teng, F., Fang, G. & Xu, X. Effects of internal tidal dissipation and self-attraction and loading on semidiurnal tides in the Bohai Sea, Yellow Sea and East China Sea: a numerical study. Chin. J. Ocean. Limnol. 35, 987–1001 (2017). https://doi.org/10.1007/s00343-017-6087-4

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  • DOI: https://doi.org/10.1007/s00343-017-6087-4

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