Wave breaking on turbulent energy budget in the ocean surface mixed layer

来源 :Chinese Journal of Oceanology and Limnology | 被引量 : 0次 | 上传用户:lnawxu
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
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 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 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).
其他文献
【摘要】本文分析了暖通工程施工中存在的问题,且针对这些问题提出了具体的解决措施。  【关键词】暖通工程;施工;问题;解决措施  中图分类号:TU74 文献标识码:A 文章编号:   一、前言  近年来随着经济的持续发展、人民生活水平的提高,对居住及工作环境的要求也在不断提高,暖通工程已经进入寻常百姓家,暖通工程的施工是项综合性的技术活必须考虑方方面面,才能确保施工质量。  二、暖通工程施工中存在的
随着21世纪新科技革命的不断深入发展,计算机技术逐渐更新进步,计算机被广泛应用于动画创作领域,计算机中的新型技术和表现手法为动画创作带来了更多新奇有趣、美丽逼真的动画画
浪漫就是两个相爱的人,吃一顿再简单不过的晚餐,手牵手地老在人生的四季更迭中。一次聚会,不知怎么就聊到浪漫一词上了。女人在一起,讨论这个话题乐此不疲,最后你一言我一语,
大宁水库(全称为北京市南水北调配套工程大宁调蓄水库工程)塑性砼防渗墙(塑性混凝土防渗墙)质量检验评定规定于2011年7月1日经北京市南水北调工程建设委员会办公室正式发布实施
请下载后查看,本文暂不支持在线获取查看简介。 Please download to view, this article does not support online access to view profile.
建筑房屋屋面补漏问题一直是人们所关注的焦点,而随着各种新材料、新技术的不断涌现,补漏问题已经能够迎仍而解。为此,文章针对建筑房屋屋面补漏新材料、新技术的应用开展相关论
Long-term measurements from a pair of High-Frequency radar systems deployed near the coast of southern Fujian Province showed that surface currents in the south
由于社会经济的发展人们生活水平的提高,大众对电力系统提出了更高的要求,电力系统自动化控制已经成为电力企业追求的重要目标。本文首先对电力系统自力化进行概述,再探究现在的
造船市场与航运市场的兴衰波动密切相关,当航运市场攀升,运价持续高涨时,造船量也会增多;同样当船队过快增长,运力过剩时又会反作用于航运市场,带来运价的低迷。本文主要阐述了造船
对98例单纯放疗的初治鼻咽癌病人入院时应用SCL-90症状自评表进行测试,结果显示,调查对象SCL-90的9个因子分均值高于国内常模,经t检验(P<0.01)有非常显著性差异,表明研究对象