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Seasonality and duration in extreme value distributions of significant wave height

机译：明显波高的极值分布中的季节性和持续时间

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摘要

This paper presents a statistical model to characterize the long-term extreme value distribution of significant wave height, conditioning to the duration of the storm and accounting for seasonality. A time-dependent version of the peak over threshold (POT) approach is used to build the model, which is then applied to specific reanalysis time series and NOAA buoy records. The model considers the annual and semiannual cycles which are parameterized in terms of harmonic functions. The inclusion of seasonal variabilities substantially reduces the residuals of the fitted model. The information obtained in this study can be useful to design maritime works, because (a) the model improves the understanding of the variability of extreme wave climate along a year and (b) the model accounts for the duration of the storm, which is a key parameter in several formulations for rubble mound breakwater design.
机译：本文提出了一个统计模型，以描述重要波高的长期极值分布，对风暴持续时间的调节以及季节性的影响。随时间变化的峰值阈值（POT）方法用于构建模型，然后将其应用于特定的重新分析时间序列和NOAA浮标记录。该模型考虑了按谐波函数参数化的年度和半年周期。包含季节变化会大大减少拟合模型的残差。在本研究中获得的信息可能对设计海事工程有用，因为（a）该模型可以增进对极端波浪气候沿一年变化的了解，并且（b）该模型可以说明风暴的持续时间，这是碎石防波堤设计的几种配方中的关键参数。

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