Difference between the Lagrangian trajectories and Eulerian residual velocity fields in the southwestern Yellow Sea

Bin Wang, Naoki Hirose, Jae Hong Moon, Dongliang Yuan

    研究成果: ジャーナルへの寄稿記事

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    The responses to tidal and/or wind forces of Lagrangian trajectories and Eulerian residual velocity in the southwestern Yellow Sea are investigated using a high-resolution circulation model. The simulated tidal harmonic constants agree well with observations and existing studies. The numerical experiment reproduces the long-range southeastward Eulerian residual current over the sloping bottom around the Yangtze Bank also shown in previous studies. However, the modeled drifters deployed at the northeastern flank of the Yangtze Bank in the simulation move northeastward, crossing over this strong southeastward Eulerian residual current rather than following it. Additional sensitivity experiments reveal that the influence of the Eulerian tidal residual currents on Lagrangian trajectories is relatively weaker than that of the wind driven currents. This result is consistent with the northeastward movement of ARGOS surface drifters actually released in the southwestern Yellow Sea. Further experiments suggest that the quadratic nature of the bottom friction is the crucial factor, in the southwestern Yellow Sea, for the weaker influence of the Eulerian tidal residual currents on the Lagrangian trajectories. This study demonstrates that the Lagrangian trajectories do not follow the Eulerian residual velocity fields in the shallow coastal regions of the southwestern Yellow Sea.

    元の言語英語
    ページ(範囲)565-576
    ページ数12
    ジャーナルOcean Dynamics
    63
    発行部数5
    DOI
    出版物ステータス出版済み - 5 2013

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    All Science Journal Classification (ASJC) codes

    • Oceanography

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