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<p>Mesoscale eddies exhibit characteristic annular surface current structures and contain substantial eddy kinetic energy, which significantly modulates ocean surface wave parameters and energy distribution. Following previous studies on wave-current interactions, this study further identified mesoscale eddies using Archiving, Validation and Interpretation of Satellite Oceanographic satellite altimetry data. By integrating observations from the China-France Oceanography Satellite Surface Wave Investigation and Monitoring with reanalysis datasets from the Copernicus Marine Environment Monitoring Service on waves and currents, three representative regions with strong currents are selected for study: the Gulf of Mexico, the Kuroshio Extension, and the Agulhas. The eddy interior is categorized into zones based on the relative propagation directions of waves and currents, distinguishing between wave-current co-directional and counter-directional zones. This new wave-current partitioning perspective enables a systematic investigation of how the internal structures of mesoscale eddies modulate key ocean surface wave parameters, including significant wave height (SWH), wavelength, wave direction, and wave spectrum. The results indicate that variations in wavelength and wave direction induced by mesoscale eddies exhibit strong spatial consistency, with the largest absolute changes predominantly occurring in wave-current co-directional zones. In contrast, changes in SWH are relatively small and more susceptible to the influence of other oceanic factors, making it difficult to observe consistent variation patterns across different regions. Further analysis of wave spectra shows that wave energy tends to converge in wave-current counter-directional zones, while divergence is typically observed in co-directional zones. Building on the theories of wave-current interaction and wave dispersion, this study also examines the influence of eddy dynamic parameters such as vorticity, divergence, strain, and deformation rate on wave characteristics across different wave-current directional partitioning.</p>

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Influence of mesoscale eddies on ocean surface waves in strong current zones based on eddy interior region wave-current directional partitioning

  • 期刊论文

  • 发表日期：

    2026年1月1日

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  • Jintong Zhu,
  • Yong Wan,
  • Chenqing Fan,
  • Qiushuang Yan,
  • Junmin Meng,
  • Jungang Yang

摘要

Mesoscale eddies exhibit characteristic annular surface current structures and contain substantial eddy kinetic energy, which significantly modulates ocean surface wave parameters and energy distribution. Following previous studies on wave-current interactions, this study further identified mesoscale eddies using Archiving, Validation and Interpretation of Satellite Oceanographic satellite altimetry data. By integrating observations from the China-France Oceanography Satellite Surface Wave Investigation and Monitoring with reanalysis datasets from the Copernicus Marine Environment Monitoring Service on waves and currents, three representative regions with strong currents are selected for study: the Gulf of Mexico, the Kuroshio Extension, and the Agulhas. The eddy interior is categorized into zones based on the relative propagation directions of waves and currents, distinguishing between wave-current co-directional and counter-directional zones. This new wave-current partitioning perspective enables a systematic investigation of how the internal structures of mesoscale eddies modulate key ocean surface wave parameters, including significant wave height (SWH), wavelength, wave direction, and wave spectrum. The results indicate that variations in wavelength and wave direction induced by mesoscale eddies exhibit strong spatial consistency, with the largest absolute changes predominantly occurring in wave-current co-directional zones. In contrast, changes in SWH are relatively small and more susceptible to the influence of other oceanic factors, making it difficult to observe consistent variation patterns across different regions. Further analysis of wave spectra shows that wave energy tends to converge in wave-current counter-directional zones, while divergence is typically observed in co-directional zones. Building on the theories of wave-current interaction and wave dispersion, this study also examines the influence of eddy dynamic parameters such as vorticity, divergence, strain, and deformation rate on wave characteristics across different wave-current directional partitioning.