Breaking waves in deep water: measurements and modeling of energy dissipation

被引:0
作者
Fadia Ticona Rollano
Adam Brown
Ashley Ellenson
H. Tuba Özkan-Haller
Jim Thomson
Merrick C. Haller
机构
[1] Oregon State University,School of Civil and Construction Engineering
[2] University of Washington,Applied Physics Laboratory
[3] Oregon State University,College of Earth, Ocean, and Atmospheric Sciences
来源
Ocean Dynamics | 2019年 / 69卷
关键词
Wave breaking; Energy dissipation; Turbulence; Prediction of wave dissipation; Spectral wave model;
D O I
暂无
中图分类号
学科分类号
摘要
In the presence of strong winds, ocean surface waves dissipate significant amounts of energy by breaking. Here, breaking rates and wave-following turbulent dissipation rate measurements are compared with numerical WAVEWATCH III estimates of bulk energy dissipation rate. At high winds, the measurements suggest that turbulent dissipation becomes saturated; however, the modeled bulk dissipation continues to increase as a cubic function of wind speed. Similarly, the mean square slope (i.e., the steepness) of the measured waves becomes saturated, while the modeled mean squared slope grows linearly with wind speed. Only a weak relation is observed between breaker fraction and wind speed, possibly because these metrics do not capture the scale (e.g., crest length) of the breakers. Finally, the model skill for basic parameters such as significant wave height is shown to be sensitive to the dissipation rate, indicating that the model skill may be compromised under energetic conditions.
引用
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页码:1165 / 1179
页数:14
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