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首页> 外文期刊>Ocean Dynamics >Wave effects in global ocean modeling: parametrizations vs. forcing from a wave model
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Wave effects in global ocean modeling: parametrizations vs. forcing from a wave model

机译：全球海洋建模中的波浪效应：波浪模型的参数化与强迫

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One of the main challenges of the Copernicus Marine Service is the implementation of coupled ocean/waves systems that accurately estimate the momentum and energy fluxes provided by the atmosphere to the ocean. This study aims to investigate the impact of forcing the Nucleus for European Modelling of the Ocean (NEMO) ocean model with forecasts from the wave model of Meteo-France (MFWAM) to improve classical air-sea flux parametrizations, these latter being mostly driven by the 10-m wind. Three wave-related processes, namely, wave-state-dependent stress, Stokes drift-related effects (Stokes-Coriolis force, Stokes drift advection on tracers and on mass), and wave-state-dependent surface turbulence, are examined at a global scale with a horizontal resolution of 0.25 degrees. Three years of sensitivity simulations (2014-2016) show positive feedback on sea surface temperature (SST) and currents when the wave model is used. A significant reduction in SST bias is observed in the tropical Atlantic Ocean. This is mainly due to the more realistic momentum flux provided by the wave model. In mid-latitudes, the most interesting impact occurs during the summer stratification, when the wind is low and the wave model produces a reduction in the turbulence linked with wave breaking. Magnitudes of the large-scale currents in the equatorial region are also improved by 10% compared to observations. In general, it is shown that using the wave model reduces on average the momentum and energy fluxes to the ocean in tropical regions, but increases them in mid-latitudes. These differences are in the order of 10 to 20% compared with the classical parametrizations found in stand-alone ocean models.
机译：哥白尼海洋服务局的主要挑战之一是如何实现海浪耦合系统，该系统能够准确估算大气层向海洋提供的动量和能量通量。这项研究的目的是利用法国气象局（MFWAM）的波浪模型预测来改进强迫欧洲海洋建模核心（NEMO）海洋模型产生的影响，以改善经典的海气通量参数化，这些因素主要是由10米长的风。在全球范围内，研究了三个与波有关的过程，即与波态有关的应力，与斯托克斯漂移有关的效应（斯托克斯-科里奥利力，示踪剂和质量上的斯托克斯漂移平流）以及与波状态有关的表面湍流。标度，水平分辨率为0.25度。三年的灵敏度模拟（2014-2016年）显示，使用波动模型时，对海表温度（SST）和洋流的正反馈。在热带大西洋中观察到SST偏差显着降低。这主要是由于波浪模型提供了更逼真的动量通量。在中纬度地区，最有趣的影响发生在夏季分层中，此时风势低，并且波浪模型使与波浪破裂有关的湍流减少。与观测值相比，赤道区域大电流的强度也提高了10％。总的来说，表明使用波动模型平均减少了热带地区进入海洋的动量和能量通量，但在中纬度地区增加了动量和能量通量。与独立海洋模型中的经典参数化相比，这些差异约为10％到20％。

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