arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1602.06649physics.flu-dynphysics.ao-ph
收藏

关于海洋上层的短时破波湍流耗散率

On the Upper Ocean Turbulent Dissipation Rate due to Very Short Breaking Wind-Waves

Michael L. Banner, Russel P. Morison

摘要:

Sutherland和Melville(2015年a)研究了从大尺度白浪到微型碎浪的不同碎浪尺度对海洋表面波边界层总耗散率的相对贡献。根据他们对各种波龄的破碎波的几何/运动学特性的测量,他们推断出破碎的耗散率是尺度的函数。这些结果进行了比较,其补充测量的总耗散率在底层波边界层。他们报告说,总的深度集成的水柱耗散率符合从破碎波的年轻到非常古老的风海耗散率。他们还报告说,在非常靠近海面的地方,观测到的消散率很高。他们的结论是,这表明总耗散率的很大一部分是由于非空气夹带的微型破碎机和非常小的白浪。由于其基本的重要性,无论是物理和精确的海气相互作用建模,我们评估这些结论的有效性。我们的数据分析表明,微型破碎机和小白浪不作出显着的贡献,在波边界层的总湍流耗散率。

英文摘要:

Sutherland and Melville (2015a) investigated the relative contributions to the total dissipation rate in the ocean surface wave boundary layer of different breaking wave scales, from large-scale whitecaps to micro-breakers. Based on their measurements of geometric/kinematic properties of breaking waves for a wide range of wave ages, they inferred the dissipation rates from breaking as a function of scale. These results were compared with their complementary measurements of the total dissipation rate in the underlying wave boundary layer. They reported that the total depth-integrated dissipation rate in the water column agreed well with dissipation rate from breaking waves for young to very old wind seas. They also reported high observed levels of dissipation rate very near the sea surface. They concluded that this showed a large fraction of the total dissipation rate was due to non-air entraining micro-breakers and very small whitecaps. Because of its fundamental importance, both physically and for accurate air-sea interaction modeling, we assess the validity of these conclusions. Our analysis of their data shows that the microbreakers and small whitecaps do not make a significant contribution to the total turbulent dissipation rate in the wave boundary layer.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑