Characterization of the Deep Water Surface Wave Variability in the California Current Region
Characterization of the Deep Water Surface Wave Variability in the California Current Region
复制标题
加州海流区域深水表面波变化特征
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
B. Cornuelle
中科院分区：
文献类型：
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作者：
A. B. V. Bôas;S. Gille;M. Mazloff;B. Cornuelle
表面波对于上层海洋的动力学至关重要，不仅因为它们介导海洋和大气之间的动量、热量、能量和气体交换，而且还因为它们决定海洋状态。给定区域中的表面波场是由本地和远程强迫的组合设定的。目前的工作描述了加州洋流地区深水表面波场的季节性变化，这些数据是从二十多年的卫星测高数据中检索的，并结合了波浪浮标和波浪模型后报（WaveWatch III）。特别是，评估当地风对有效波高、峰值周期和峰值方向的变化的程度。在春季/夏季，高达 10 m/s 的区域性风事件是加州海岸附近波浪的主要强迫力，导致主要来自西北偏北的相对较短周期的波浪（8-10 秒）。整个加州海流区域的波浪气候显示，一年中大部分时间平均有效波高超过 2 m，这可能对地表水和海洋地形 (SWOT) 卫星任务的规划和反演方法产生影响。
Surface waves are crucial for the dynamics of the upper ocean not only because they mediate exchanges of momentum, heat, energy, and gases between the ocean and the atmosphere, but also because they determine the sea state. The surface wave field in a given region is set by the combination of local and remote forcing. The present work characterizes the seasonal variability of the deep water surface wave field in the California Current region, as retrieved from over two decades of satellite altimetry data combined with wave buoys and wave model hindcast (WaveWatch III). In particular, the extent to which the local wind modulates the variability of the significant wave height, peak period, and peak direction is assessed. During spring/summer, regional-scale wind events of up to 10 m/s are the dominant forcing for waves off the California coast, leading to relatively short-period waves (8–10 s) that come predominantly from the north-northwest. The wave climatology throughout the California Current region shows average significant wave heights exceeding 2 m during most of the year, which may have implications for the planning and retrieval methods of the Surface Water and Ocean Topography (SWOT) satellite mission.