Space–Time Wave Extremes: The Role of Metocean Forcings
Space–Time Wave Extremes: The Role of Metocean Forcings
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时空波极端：海洋气象力的作用
DOI：
10.1175/jpo-d-14-0232.1
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发表时间：
2015
影响因子：
3.5
通讯作者：
M. Sclavo
中科院分区：
文献类型：
--
作者：
F. Barbariol;A. Benetazzo;S. Carniel;M. Sclavo
波浪观测和模拟最近表明，短峰海域的波浪极值很难通过时间记录的统计来预测。事实上，最高的波属于具有时空动力学的聚焦波群。因此，短峰海况极值的统计预报应基于多维随机波场的假设。为了使波的极值统计量适应于时空域，最近发展了使用定向波谱参数的理论模型。本文采用双重策略研究了海洋强迫（风条件、环境流和海底深度）对这些参数的影响，从而对波浪极值的影响进行了研究。首先，考虑参数谱公式[Pierson-Moskowitz和Joint North Sea Wave Project （JONSWAP）具有cos2方向分布函数的频谱]来表示波浪极值与风速、fetch和空间域大小的依赖关系。Afterwa……
AbstractWave observations and modeling have recently demonstrated that wave extremes of short-crested seas are poorly predicted by statistics of time records. Indeed, the highest waves pertain to wave groups at focusing that have space–time dynamics. Therefore, the statistical prediction of extremes of short-crested sea states should rely on the multidimensional random wave fields’ assumption. To adapt wave extreme statistics to the space–time domain, theoretical models using parameters of the directional wave spectrum have been recently developed. In this paper, the influence of metocean forcings (wind conditions, ambient current, and bottom depth) on these parameters and hence on wave extremes is studied with a twofold strategy. First, parametric spectral formulations [Pierson–Moskowitz and Joint North Sea Wave Project (JONSWAP) frequency spectra with cos2 directional distribution function] are considered to represent the dependence of wave extremes upon wind speed, fetch, and space domain size. Afterwa...