ABSTRACT An ocean wave model for the northwest Atlantic Ocean based on WAVEWATCH III is used to evaluate four different source term packages (known as ST2, ST3, ST4, and ST6) for the wind input and wave dissipation. The performance of ST2, ST3, ST4, and ST6 is assessed using available measurements from buoy stations and satellite altimeters. The model results for significant wave height ( ), mean wave period ( ), wave spectrum, wind input, and wave dissipation are examined during two periods: (i) winter storms in February and (ii) Hurricane Ophelia in September/October 2011. Analyses of model results demonstrate that ST4 and ST6 have the best performance with an average scatter index within 19.0% for and in the presence of strong currents and sea ice. These four packages perform differently under different sea states. Package ST6 generally overestimates under the wind-wave-dominated sea states because of strong wind input and fast wave growth but underestimates under swell-dominated sea states because of strong swell dissipation. The effects of ocean surface currents and sea ice on the wave model performance are also investigated. The linear kinematic effects of surface currents on waves can cause non-linear dynamic effects, which can differ among the four packages. Wave scattering in sea ice increases the wave directional spread and may cause an increase in . In the presence of sea ice, wind input is reduced and shifted to higher frequencies and wave dissipation is further suppressed.

中文翻译：

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西北大西洋谱波模型中风输入和波耗散参数化的性能评估

摘要 基于 WAVEWATCH III 的西北大西洋海浪模型用于评估风输入和波浪耗散的四种不同源项包（称为 ST2、ST3、ST4 和 ST6）。ST2、ST3、ST4 和 ST6 的性能使用浮标站和卫星高度计的可用测量值进行评估。在两个时期检查了有效波高 ( )、平均波浪周期 ( )、波谱、风输入和波浪耗散的模型结果：(i) 2 月的冬季风暴和 (ii) 2011 年 9 月/10 月的飓风奥菲莉亚。模型结果分析表明，ST4 和 ST6 具有最佳性能，平均散射指数在 19.0% 以内，并且存在强流和海冰时。这四个包在不同的海况下表现不同。ST6 包在风浪主导海况下，由于风输入强，海浪增长快，普遍高估，但在涌浪主导海况下，由于涌浪消散强，低估。还研究了海面洋流和海冰对波浪模型性能的影响。表面电流对波浪的线性运动学效应会导致非线性动态效应，这在四种封装中可能有所不同。海冰中的波浪散射会增加波浪的方向传播，并可能导致 。在存在海冰的情况下，风输入减少并转移到更高的频率，波浪耗散得到进一步抑制。