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An Experiment on the Nonbreaking Surface-Wave-Induced Vertical Mixing

机译：不间断表面波诱导垂直混合的实验

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摘要

Mixing induced by nonbreaking surface waves was investigated in a wave tank by measuring the thermal destratification rate of the water column. One experiment without waves and four experiments with waves of amplitudes ranging from 1.0 to 1.5 cm and wavelength from 30 to 75 cm were conducted. Water temperature variations at depths from 4 to 12 cm below the surface were measured. In the layer from 4 to 7 cm, the originally dense isothermal lines disperse soon after the waves are generated, whereas the vertical gradient from 9 to 12 cm is maintained for a relatively long time. The time span, during which the water temperature becomes well mixed, changes from about 20 h for the case with no waves to tens of minutes for the case with waves, and it decreases with increasing wave amplitude and wavelength. A one-dimensional diffusion numerical model with wave-induced mixing parameterization shows consistent results with the measurement. The study demonstrates that the mixing induced by nonbreaking waves may add an important contribution to the vertical mixing process in the upper ocean and suggests a way to parameterize wave-induced mixing in numerical ocean models.
机译：通过测量水柱的热分层率，研究了在波浪罐中由不破裂的表面波引起的混合。进行了一个无波实验和四个波幅范围为1.0至1.5 cm，波长为30至75 cm的实验。测量了水面以下4至12厘米处的水温变化。在4至7 cm的层中，最初密集的等温线在波浪产生后很快散开，而从9至12 cm的垂直梯度则保持相对较长的时间。水温充分混合的时间跨度从无浪情况下的约20 h变为有浪情况下的数十分钟，并且随着波幅和波长的增加而减小。具有波致混合参数化的一维扩散数值模型显示与测量结果一致。研究表明，由不间断波浪引起的混合可能对上层海洋的垂直混合过程起到重要作用，并提出了一种在数值海洋模型中参数化波浪引起的混合的方法。

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    《Journal of Physical Oceanography》 |2010年第9期|P.2180-2188|共9页
  • 作者

    Dejun Dai; Fangli Qiao; Wojciech Sulisz; Lei Han; Alexander Babanin;

  • 作者单位

    First Institute of Oceanography, State Oceanic Administration, Qingdao, China;

    rnKey Laboratory of Marine Science and Numerical Modeling, First Institute of Oceanography, 6 Xianxialing Road, Qingdao 266061, China;

    rnInstitute of Hydroengineering, Polish Academy of Sciences, Gdansk, Poland;

    rnFirst Institute of Oceanography, State Oceanic Administration, Qingdao, China;

    rnSwinburne University of Technology, Melbourne, Victoria, Australia;

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