Ocean Science
Ocean Science
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Articles | Volume 22, issue 5
Articles | Volume 22, issue 5
https://doi.org/10.5194/os-22-2957-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/os-22-2957-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 22, issue 5
Research article
 | 
30 Sep 2026
Research article |  | 30 Sep 2026

Local dissipation ratio of internal tides at key topographic features in the South China Sea

Zuqing Yuan, Hui Sun, Qingxuan Yang, Fenyuan Han, and Jianing Li

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Short summary
The local dissipation ratio (q*) of internal tides (ITs) is usually treated as constant in large-scale ocean models. Our study finds q* ranges from 0.3 to 0.7 in the Luzon Strait driven by high-mode ITs breaking, and exceeds 1 around the Nansha Islands driven by far-field ITs converging and scattering. We proposed two parameterizations for q*, which capture its regional difference and periodic change and highlight the need to incorporate non-local processes into tidal mixing parameterizations.
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