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首页> 外文期刊>Journal of Physical Oceanography >Wave Breaking Dissipation in a Young Wind Sea
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Wave Breaking Dissipation in a Young Wind Sea

机译：年轻的风海中的波散消散

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摘要

Coupled in situ and remote sensing measurements of young, strongly forced wind waves are applied to assess the role of breaking in an evolving wave field. In situ measurements of turbulent energy dissipation from wave-following Surface Wave Instrument Float with Tracking (SWIFT) drifters and a tethered acoustic Doppler sonar system are consistent with wave evolution and wind input (as estimated using the radiative transfer equation). The Phillips breaking crest distribution Λ(c) is calculated using stabilized shipboard video recordings and the Fourier-based method of Thomson and Jessup, with minor modifications. The resulting Λ(c) are unimodal distributions centered around half of the phase speed of the dominant waves, consistent with several recent studies. Breaking rates from Λ(c) increase with slope, similar to in situ dissipation. However, comparison of the breaking rate estimates from the shipboard video recordings with the SWIFT video recordings show that the breaking rate is likely underestimated in the shipboard video when wave conditions are calmer and breaking crests are small. The breaking strength parameter b is calculated by comparison of the fifth moment of Λ(c) with the measured dissipation rates. Neglecting recordings with inconsistent breaking rates, the resulting b data do not display any clear trends and are in the range of other reported values. The Λ(c) distributions are compared with the Phillips equilibrium range prediction and previous laboratory and field studies, leading to the identification of several inconsistencies.
机译：对年轻的强力风波进行原位和遥感测量，以评估破裂在不断演变的波场中的作用。随波跟踪的带跟踪表面波仪器浮标（SWIFT）漂移器和系留声多普勒声纳系统的湍流能量耗散的原位测量与波的演化和风的输入（使用辐射传递方程估算）一致。使用稳定的舰载视频记录以及基于Thomson和Jessup的基于Fourier的方法（略有修改）来计算Phillips断裂波峰分布Λ（c）。所得的Λ（c）是单峰分布，中心位于主导波相速度的一半附近，这与最近的一些研究一致。与原位耗散相似，Λ（c）的折断率随斜率增加。但是，将船载视频记录的破损率估算值与SWIFT录像记录进行比较，结果表明，在波浪条件较为稳定且波峰较小的情况下，船上视频的破损率可能会被低估。断裂强度参数b是通过比较Λ（c）的第五矩与测得的耗散率来计算的。忽略破损率不一致的记录，所得的b数据没有显示任何明显的趋势，并且在其他报告值的范围内。将Λ（c）分布与Phillips平衡范围预测以及先前的实验室和田野研究进行比较，从而确定了一些不一致之处。

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  • 来源
    《Journal of Physical Oceanography》 |2014年第1期|104-127|共24页
  • 作者

    Michael Schwendeman; Jim Thomson; Johannes R. Gemmrich;

  • 作者单位

    Applied Physics Laboratory, University of Washington, Seattle, Washington,University of Washington, 1013 NE 40th Street, Box 355640, Seattle, WA 98105-6698;

    Applied Physics Laboratory, University of Washington, Seattle, Washington;

    Department of Physics and Astronomy, University of Victoria, Victoria, British Columbia, Canada;

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