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20.1 引言 混合参数表面波浪预报模式（HYPA）可用于深水海浪预报。这个模式是早期NORSWAM模式（Gunther等,1979a,b及Ewing等,1979）的一个引伸。除了一维风浪谱的参数预报外,它还包括了另一个预报参数——平均风浪浪向（Gunther等,1981）。相对于不同的频率和方位,涌浪沿着预先给定的特征线传播,此方法与NORSWAM模式相同。在下一节中,我们将分三个部分（风浪、涌浪及风浪与涌浪的交换）介绍这一模式。 20.2 风浪 参数预报方程可由动量方程导出其中m是动量密度谱,v是群速,τ是谱动量密度的源函数。这一项一般可划分为大气输入项τ_(in),消耗项τ_(dis)和非线性相互作用项τ_(nl)。
20.1 INTRODUCTION Hybrid parameters Surface Wave Prediction (HYPA) can be used for deep-sea wave forecasting. This model is an extension of the early NORSWAM model (Gunther et al., 1979a, b and Ewing et al., 1979). In addition to the one-dimensional wind wave spectrum parameter forecast, it also includes another forecast parameters - the average wind and waves (Gunther et al., 1981). The surge propagates along a predefined characteristic line relative to different frequencies and orientations. This method is the same as NORSWAM mode. In the next section, we will introduce this model in three parts: the waves, surges, and the exchange of storms and surges. 20.2 Prediction equations for wind and wave parameters can be derived from the momentum equation where m is the momentum density spectrum, v is the group velocity, and τ is the source function of the spectral momentum density. This term can generally be divided into the atmospheric input term τ_ (in), the consumption term τ_ (dis) and the nonlinear interaction term τ_ (nl).