Articles | Volume 22, issue 3
https://doi.org/10.5194/os-22-1545-2026
https://doi.org/10.5194/os-22-1545-2026
Research article
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18 May 2026
Research article | Highlight paper |  | 18 May 2026

Internal tides–cyclonic eddy interaction and intermodal energy pathways: evidence from 3 km NEMO-AMAZON36 simulations

Fabius Kouogang, Ariane Koch-Larrouy, Xavier Carton, Fernand Assene, Guillaume Morvan, and Moacyr Araujo

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Editorial statement
This study shows that the fate of internal tide energy is not uniform but is dictated by interactions with mesoscale eddies features, affecting the intensity and distribution of energy flux. The study finds that the specific response of an internal tide—whether it propagates freely or deviates—is dually controlled by the internal tide vertical modal structure, and the ocean state it encounters together with its associated background conditions. In additions, it is also found that the redistribution of energy via intermodal transfers is governed by a hierarchy of synergistic interactions between the topographic features and the background flow of the ocean state.
Short summary
Our research investigates how large waves travel deep within the ocean. Using a detailed computer model, we show that when these deep waves meet giant ocean circulation, their path is dramatically changed. They can be bent off course, split apart, or stopped completely. An underwater mountain works with this circulation to transfer the wave energy between different ocean layers. Understanding this process is vital because it controls ocean mixing.
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