Wave-Breaking Turbulence in the Ocean Surface Layer
Wave-Breaking Turbulence in the Ocean Surface Layer
复制标题
海洋表层的破浪湍流
DOI：
10.1175/jpo-d-15-0130.1
复制
发表时间：
2015
影响因子：
3.5
通讯作者：
W. E. Rogers
中科院分区：
文献类型：
--
作者：
J. Thomson;M. Schwendeman;S. Zippel;S. Moghimi;J. Gemmrich;W. E. Rogers
摘要：将海洋表面风、波浪和湍流的观测结果与通过波浪破碎输入湍流动能和随后耗散的几种解析公式和数值模型进行了比较。尽管风速大于 15 m s−1 时存在显着差异，但观测结果总体上与所有公式一致。波下湍流耗散率的深度依赖性适合衰减尺度，这对垂直参考系的选择敏感。在表面跟随参考系中，最强的湍流被隔离在深度远小于一个有效波高的浅区域内。在固定参考系中，强湍流穿透的深度至少为有效波高的一半。发生这种情况是因为单个破碎机的湍流持续时间比波浪的主导周期长，因此强烈的表面湍流随着波球从波峰带到波谷......
AbstractObservations of winds, waves, and turbulence at the ocean surface are compared with several analytic formulations and a numerical model for the input of turbulent kinetic energy by wave breaking and the subsequent dissipation. The observations are generally consistent with all of the formulations, although some differences are notable at winds greater than 15 m s−1. The depth dependence of the turbulent dissipation rate beneath the waves is fit to a decay scale, which is sensitive to the choice of vertical reference frame. In the surface-following reference frame, the strongest turbulence is isolated within a shallow region of depths much less than one significant wave height. In a fixed reference frame, the strong turbulence penetrates to depths that are at least half of the significant wave height. This occurs because the turbulence of individual breakers persists longer than the dominant period of the waves and thus the strong surface turbulence is carried from crest to trough with the wave orb...