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Penetration of Wind-Generated Near-Inertial Waves into a Turbulent Ocean

机译：将风力产生的近惯性波渗透到湍流海洋中

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摘要

An idealized storm scenario is examined in which a wind-generated inertial wave interacts with a turbulent baroclinic quasigeostrophic flow. The flow is initialized by spinning up an Eady model with a stratification profile based on observations. The storm is modeled as an initial value problem for a mixed layer confined, horizontally uniform inertial oscillation. The primordial inertial oscillation evolves according to the phase-averaged model of Young and Ben Jelloul. Waves feed back onto the flow by modifying the potential vor-ticity. In the first few days, refraction dominates and wave energy is attracted (repelled) by regions of negative (positive) vorticity. Wave energy is subsequently drained down into the interior ocean guided by anticyclonic vortices. This drainage halts as wave energy encounters weakening vorticity. After a week or two, wave energy accumulates at the bottom of negative vorticity features, that is, along filamentary structures at shallow depths and in larger anticyclonic vortices at greater depths. Wave feedback tends to weaken vortices and thus slows the penetration of waves into the ocean interior. This nonlinear effect, however, is weak even for vigorous storms.
机译：检查一个理想化的风暴场景，其中风产生的惯性波与湍流的曲金Quasignigstrophic流程相互作用。通过基于观察的分层剖面旋转速度模型来初始化流程。风暴被建模为混合层被限制，水平均匀惯性振荡的初始值问题。原始惯性振荡根据年轻和Ben Jelloul的相位平均模型演变。通过修改潜在的VOR-TICITY，波浪馈回流动。在最初的几天内，通过阴性（阳性）涡度的区域吸引（拒绝）（拒绝）折射率和波能量。随后将波动能量被排出到由反气旋涡旋引导的室内海洋中。随着波能量遇到扭转性的波能量，这种排水将停止。经过一两周或两个，波能量在负涡度特征的底部积聚，即沿着浅深度的丝结构，并且在更大深度的较大的反气旋涡流处。波反馈趋于削弱漩涡，从而减慢波浪进入海洋内部的渗透。然而，这种非线性效应甚至是剧烈风暴的弱点。

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  • 来源
    《Journal of Physical Oceanography》 |2020年第6期|1699-1716|共18页
  • 作者

    Olivier Asselin; William R. Young;

  • 作者单位

    Scripps Institution of Oceanography University of California San Diego La Jolla California;

    Scripps Institution of Oceanography University of California San Diego La Jolla California;

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  • 正文语种 eng
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