Articles | Volume 20, issue 1
https://doi.org/10.5194/os-20-241-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/os-20-241-2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
21 Feb 2024
Research article |
| 21 Feb 2024
| 21 Feb 2024
Numerical investigation of interaction between anticyclonic eddy and semidiurnal internal tide in the northeastern South China Sea
Liming Fan
Frontier Science Center for Deep Ocean Multispheres and Earth System (FDOMES) and Physical Oceanography Laboratory/Sanya Oceanographic Institution, Ocean University of China, Qingdao/Sanya, 266100/572024, China
Frontier Science Center for Deep Ocean Multispheres and Earth System (FDOMES) and Physical Oceanography Laboratory/Sanya Oceanographic Institution, Ocean University of China, Qingdao/Sanya, 266100/572024, China
Frontier Science Center for Deep Ocean Multispheres and Earth System (FDOMES) and Physical Oceanography Laboratory/Sanya Oceanographic Institution, Ocean University of China, Qingdao/Sanya, 266100/572024, China
Laoshan Laboratory, Qingdao, 266100, China
Jianing Li
Frontier Science Center for Deep Ocean Multispheres and Earth System (FDOMES) and Physical Oceanography Laboratory/Sanya Oceanographic Institution, Ocean University of China, Qingdao/Sanya, 266100/572024, China
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This preprint is open for discussion and under review for Ocean Science (OS).
Short summary
Short summary
The local dissipation efficiency (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.
Jianing Li, Qingxuan Yang, and Hui Sun
Ocean Sci., 21, 829–849, https://doi.org/10.5194/os-21-829-2025, https://doi.org/10.5194/os-21-829-2025, 2025
Short summary
Short summary
The Osborn relation is widely used to estimate the diapycnal mixing rate, but its accuracy is questioned due to the assumed constant dissipation ratio (Γ) without identifying mixing types. We identify a salt finger and turbulence in the western Pacific and midlatitude Atlantic, finding that Γ is highly variable and related to turbulence parameters, through which we improve mixing rate estimates. Identifying mixing types and refining Γ are necessary to improve mixing parameterization accuracy.
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Short summary
Understanding internal tide generation and propagation is crucial for predicting large-scale circulation and climate change. Internal tides are prone to interacting with background currents with similar spatial scales during propagation. This paper investigates the physical mechanism of the interaction between semidiurnal internal tides and an anticyclonic eddy in the northeastern South China Sea using a numerical model with high spatial and temporal resolution.
Understanding internal tide generation and propagation is crucial for predicting large-scale...
