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<p>The variations of the frontogenetic activity of cold filament driven by the different angle (<i>θ</i>=0°, 22.5°, 45°, 67.5°, and 90°) of the wind and wave fields and the filament axis are studied by non-hydrostatic large eddy simulation. Conversion between the frontogenesis and frontolysis of cold filament were created by the chang in the direction of secondary circulations. The changes in the direction of secondary circulation are induced by the Coriolis Effect regardless of wind direction and wave fields. The destructive action of the wind and wave fields on symmetry of the submesoscale flow fields becomes weak as the angle increases. The secondary downwelling jet induced by Stokes shear force is gradually close to that associated with secondary circulations as the angle changes from <i>θ</i>=0° to 45° and then the downwelling jet is only created by secondary circulations for <i>θ</i>=67.5° and 90°. The frontogenetic intensity of cold filament may be impacted by the angle of the wind and wave fields and the filament axis. The reason is that firstly the odd-symmetry of secondary circulations enhances with the angle increasing, and secondary the secondary downwelling jet created the Stokes shear force gradually weakens and then disappears with the angle increasing.</p>

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Frontogenesis and frontolysis of cold filament impacted by different directions of wind and wave fields using large eddy simulation

  • 期刊论文

  • 发表日期：

    2025年1月2日

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  • Guojing Li,
  • Dongxiao Wang,
  • Changming Dong,
  • Yeqiang Shu,
  • Yunkai He

摘要

The variations of the frontogenetic activity of cold filament driven by the different angle (θ=0°, 22.5°, 45°, 67.5°, and 90°) of the wind and wave fields and the filament axis are studied by non-hydrostatic large eddy simulation. Conversion between the frontogenesis and frontolysis of cold filament were created by the chang in the direction of secondary circulations. The changes in the direction of secondary circulation are induced by the Coriolis Effect regardless of wind direction and wave fields. The destructive action of the wind and wave fields on symmetry of the submesoscale flow fields becomes weak as the angle increases. The secondary downwelling jet induced by Stokes shear force is gradually close to that associated with secondary circulations as the angle changes from θ=0° to 45° and then the downwelling jet is only created by secondary circulations for θ=67.5° and 90°. The frontogenetic intensity of cold filament may be impacted by the angle of the wind and wave fields and the filament axis. The reason is that firstly the odd-symmetry of secondary circulations enhances with the angle increasing, and secondary the secondary downwelling jet created the Stokes shear force gradually weakens and then disappears with the angle increasing.