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首页> 外文期刊>Journal of Physical Oceanography >Observation-Based Source Terms in the Third-Generation Wave Model WAVEWATCH Ⅲ: Updates and Verification
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Observation-Based Source Terms in the Third-Generation Wave Model WAVEWATCH Ⅲ: Updates and Verification

机译：第三代波浪模型WAVEWATCHⅢ中基于观测的源术语：更新和验证

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摘要

The observation-based source terms available in the third-generation wave model WAVEWATCH III (i.e., the ST6 package for parameterizations of wind input, wave breaking, and swell dissipation terms) are recalibrated and verified against a series of academic and realistic simulations, including the fetch/duration-limited test, a Lake Michigan hindcast, and a 1-yr global hindcast. The updated ST6 not only performs well in predicting commonly used bulk wave parameters (e.g., significant wave height and wave period) but also yields a clearly improved estimation of high-frequency energy level (in terms of saturation spectrum and mean square slope). In the duration-limited test, we investigate the modeled wave spectrum in a detailed way by introducing spectral metrics for the tail and the peak of the omnidirectional wave spectrum and for the directionality of the two-dimensional frequency-direction spectrum. The omnidirectional frequency spectrum E(f) from the recalibrated ST6 shows a clear transition behavior from a power law of approximately f(-4) to a power law of about f(-5), comparable to previous field studies. Different solvers for nonlinear wave interactions are applied with ST6, including the Discrete Interaction Approximation (DIA), the more expensive Generalized Multiple DIA (GMD), and the very expensive exact solutions [using the Webb-Resio-Tracy method (WRT)]. The GMD-simulated E(f) is in excellent agreement with that from WRT. Nonetheless, we find the peak of E(f) modeled by the GMD and WRT appears too narrow. It is also shown that in the 1-yr global hindcast, the DIA-based model overestimates the low-frequency wave energy (wave period T 16 s) by 90%. Such model errors are reduced significantly by the GMD to similar to 20%.
机译：第三代波浪模型WAVEWATCH III中可用的基于观测的源项（即用于风输入，波浪破碎和涌浪消散项的参数化的ST6软件包）经过重新校准，并针对一系列学术和现实模拟进行了验证，包括提取/持续时间有限的测试，密歇根湖的后预报和全球1年后预报。更新后的ST6不仅可以很好地预测常用的体波参数（例如，重要的波高和波周期），而且可以明显改善对高频能级的估计（就饱和谱和均方斜率而言）。在持续时间有限的测试中，我们通过引入全向波谱的尾部和峰值以及二维频率方向谱的方向性的频谱度量，来详细研究建模的波谱。经过重新校准的ST6的全向频谱E（f）表现出从大约f（-4）的幂定律到大约f（-5）的幂定律的清晰过渡行为，与以前的现场研究相当。 ST6应用于非线性波相互作用的不同求解器，包括离散相互作用近似（DIA），更昂贵的广义多重DIA（GMD）和非常昂贵的精确解决方案[使用Webb-Resio-Tracy方法（WRT）]。 GMD模拟的E（f）与WRT的非常吻合。尽管如此，我们发现由GMD建模的E（f）的峰太窄了。还表明，在1年的全球后兆中，基于DIA的模型将低频波能量（波周期T> 16 s）高估了90％。 GMD将此类模型误差显着降低至20％。

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  • 来源
    《Journal of Physical Oceanography》 |2019年第2期|489-517|共29页
  • 作者

    Liu Qingxiang; Rogers W. Erick; Babanin Alexander V.; Young Ian R.; Romero Leonel; Zieger Stefan; Qiao Fangli; Guan Changlong;

  • 作者单位

    Univ Melbourne, Dept Infrastruct Engn, Melbourne, Vic, Australia;

    Naval Res Lab, Stennis Space Ctr, MS USA;

    Univ Melbourne, Dept Infrastruct Engn, Melbourne, Vic, Australia;

    Univ Melbourne, Dept Infrastruct Engn, Melbourne, Vic, Australia;

    Univ Calif Santa Barbara, Earth Res Inst, Santa Barbara, CA 93106 USA;

    Bur Meteorol, Melbourne, Vic, Australia;

    Minist Nat Resources, Inst Oceanog 1, Qingdao, Peoples R China;

    Ocean Univ China, Phys Oceanog Lab, Qingdao, Peoples R China|Pilot Natl Lab Marine Sci & Technol, Qingdao, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Wind waves;

    机译：风浪;

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