Swell dissipation from 10 years of Envisat advanced synthetic aperture radar in wave mode
Swell dissipation from 10 years of Envisat advanced synthetic aperture radar in wave mode
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DOI：
10.1002/2015gl067566
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发表时间：
2016-04
影响因子：
5.2
通讯作者：
J. Stopa;F. Ardhuin;R. Husson;Haoyu Jiang;B. Chapron;F. Collard
中科院分区：
文献类型：
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作者：
J. Stopa;F. Ardhuin;R. Husson;Haoyu Jiang;B. Chapron;F. Collard
所有海洋中都有涌浪，它强烈地影响波浪气候和海气过程。鲜为人知的膨胀耗散是波浪预报和预报中最大的误差来源。我们使用合成孔径雷达数据来识别膨胀源和轨迹，从而对膨胀耗散进行统计上的显著估计。我们挖掘了整个2003-2012年Envisat任务，以寻找在其传播过程中多次观测到的具有膨胀（13 < T < 18 s）的合适风暴。这个膨胀事件数据库提供了一个全面的膨胀视图，扩展了以前的工作。分析表明，波浪耗散与波浪陡度、风速、轨道波速、风浪相对方向的相关性较弱。虽然发现了几个负耗散率，但合成孔径雷达导出的膨胀高度和耗散率存在不确定性。可接受的膨胀耗散率范围为−0.1 ~ 6 × 10−7 m−1，中位数为1 × 10−7 m−1。
Swells are found in all oceans and strongly influence the wave climate and air‐sea processes. The poorly known swell dissipation is the largest source of error in wave forecasts and hindcasts. We use synthetic aperture radar data to identify swell sources and trajectories, allowing a statistically significant estimation of swell dissipation. We mined the entire Envisat mission 2003–2012 to find suitable storms with swells (13 < T < 18 s) that are observed several times along their propagation. This database of swell events provides a comprehensive view of swell extending previous efforts. The analysis reveals that swell dissipation weakly correlates with the wave steepness, wind speed, orbital wave velocity, and the relative direction of wind and waves. Although several negative dissipation rates are found, there are uncertainties in the synthetic aperture radar‐derived swell heights and dissipation rates. An acceptable range of the swell dissipation rate is −0.1 to 6 × 10−7 m−1 with a median of 1 × 10−7 m−1.