Wave-turbulence scaling in the ocean mixed layer
Wave-turbulence scaling in the ocean mixed layer
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DOI：
10.5194/os-9-597-2013
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发表时间：
2012-12
期刊：
影响因子：
3.2
通讯作者：
G. Sutherland;B. Ward;K. Christensen
中科院分区：
文献类型：
--
作者：
G. Sutherland;B. Ward;K. Christensen
抽象的。使用自主自由上升剖面仪在公海中各种不同的大气强迫和海况下收集微观结构测量结果。在这里，湍流动能耗散率 e 的分布与各种建议的缩放比例进行了比较。在海洋边界层中，e 的深度依赖性被发现与剪切驱动壁层的预期很大程度上一致。这与最近的许多研究形成鲜明对比，这些研究表明近海表面的湍流动能耗散率较高。然而，一些耗散剖面似乎与风和涌浪产生的斯托克斯切变的总和成比例，并且这种比例延伸超出了混合层深度。在混合层中对 e 进行积分得出的结果是，以 10 m 为基准的风能的 1% 在这里被耗散。
Abstract. Microstructure measurements were collected using an autonomous freely rising profiler under a variety of different atmospheric forcing and sea states in the open ocean. Here, profiles of turbulent kinetic energy dissipation rate, e, are compared with various proposed scalings. In the oceanic boundary layer, the depth dependence of e was found to be largely consistent with that expected for a shear-driven wall layer. This is in contrast with many recent studies which suggest higher rates of turbulent kinetic energy dissipation in the near surface of the ocean. However, some dissipation profiles appeared to scale with the sum of the wind and swell generated Stokes shear with this scaling extending beyond the mixed layer depth. Integrating e in the mixed layer yielded results that 1% of the wind power referenced to 10 m is being dissipated here.