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Laboratory experiments on the resonance of internal waves on a finite height subcritical topography

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Abstract

We quantitatively study the generation and resonance of internal waves on a finite height subcritical topography in laboratory. The results show that the resonance occurs when two internal wave rays emanating from the two bottom corners overlap each other. The normalized kinetic energy of internal waves increases one order of magnitude, which is four times as large as that predicted by theory. Moreover, the resonant slope of the internal wave is 10 % larger than theoretical value. We also found that the rays are emanated from a finite region near the bottom, in contrast to theory that shows “point” source region.

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Acknowledgments

We are grateful to Chuncheng Guo for his helpful comments. Insightful comments from the anonymous reviewer were very helpful in improving the work. This work was supported by the Natural Science Foundation of China (Projects 41476001 and 41276008).

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Correspondence to Xu Chen.

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Responsible Editor: Dirk Olbers

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Wang, J., Chen, X., Wang, W. et al. Laboratory experiments on the resonance of internal waves on a finite height subcritical topography. Ocean Dynamics 65, 1269–1274 (2015). https://doi.org/10.1007/s10236-015-0874-2

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  • DOI: https://doi.org/10.1007/s10236-015-0874-2

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