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	Wave breaking on turbulent energy budget in the ocean surface mixed layer
	Sun Qun1; Guan Changlong2; Song Jinbao1
刊名	CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
	2008-02-01
卷号	26期号:1页码:9-13
关键词	Wave Breaking Ocean Surface Mixed Layer Turbulent Energy Budget
ISSN号	0254-4059
DOI	10.1007/s00343-008-0009-4
文献子类	Article
英文摘要	As an important physical process at the air-sea interface, wave movement and breaking have a significant effect on the ocean surface mixed layer (OSML). When breaking waves occur at the ocean surface, turbulent kinetic energy (TKE) is input downwards, and a sublayer is formed near the surface and turbulence vertical mixing is intensively enhanced. A one-dimensional ocean model including the Mellor-Yamada level 2.5 turbulence closure equations was employed in our research on variations in turbulent energy budget within OSML. The influence of wave breaking could be introduced into the model by modifying an existing surface boundary condition of the TKE equation and specifying its input. The vertical diffusion and dissipation of TKE were effectively enhanced in the sublayer when wave breaking was considered. Turbulent energy dissipated in the sublayer was about 92.0% of the total depth-integrated dissipated TKE, which is twice higher than that of non-wave breaking. The shear production of TKE decreased by 3.5% because the mean flow fields tended to be uniform due to wave-enhanced turbulent mixing. As a result, a new local equilibrium between diffusion and dissipation of TKE was reached in the wave-enhanced layer. Below the sublayer, the local equilibrium between shear production and dissipation of TKE agreed with the conclusion drawn from the classical law-of-the-wall (Craig and Banner, 1994).; As an important physical process at the air-sea interface, wave movement and breaking have a significant effect on the ocean surface mixed layer (OSML). When breaking waves occur at the ocean surface, turbulent kinetic energy (TKE) is input downwards, and a sublayer is formed near the surface and turbulence vertical mixing is intensively enhanced. A one-dimensional ocean model including the Mellor-Yamada level 2.5 turbulence closure equations was employed in our research on variations in turbulent energy budget within OSML. The influence of wave breaking could be introduced into the model by modifying an existing surface boundary condition of the TKE equation and specifying its input. The vertical diffusion and dissipation of TKE were effectively enhanced in the sublayer when wave breaking was considered. Turbulent energy dissipated in the sublayer was about 92.0% of the total depth-integrated dissipated TKE, which is twice higher than that of non-wave breaking. The shear production of TKE decreased by 3.5% because the mean flow fields tended to be uniform due to wave-enhanced turbulent mixing. As a result, a new local equilibrium between diffusion and dissipation of TKE was reached in the wave-enhanced layer. Below the sublayer, the local equilibrium between shear production and dissipation of TKE agreed with the conclusion drawn from the classical law-of-the-wall (Craig and Banner, 1994).
学科主题	Limnology ; Oceanography
URL标识	查看原文
语种	英语
WOS记录号	WOS:000255743900002
公开日期	2010-12-24
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/5231]
专题	海洋研究所_海洋环流与波动重点实验室
作者单位	1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 2.Ocean Univ China, Phys Oceanog Lab, Qingdao 266003, Peoples R China
推荐引用方式 GB/T 7714	Sun Qun,Guan Changlong,Song Jinbao. Wave breaking on turbulent energy budget in the ocean surface mixed layer[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2008,26(1):9-13.
APA	Sun Qun,Guan Changlong,&Song Jinbao.(2008).Wave breaking on turbulent energy budget in the ocean surface mixed layer.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,26(1),9-13.
MLA	Sun Qun,et al."Wave breaking on turbulent energy budget in the ocean surface mixed layer".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 26.1(2008):9-13.

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