Observations of the turbulent kinetic energy dissipation rate in the upper central South China Sea

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 热带海洋环境国家重点实验室(LTO)

	Observations of the turbulent kinetic energy dissipation rate in the upper central South China Sea
	Liang, CR; Chen, GY; Shang, XD
刊名	OCEAN DYNAMICS
	2017
卷号	67 期号:5 页码:597-609
关键词	Dissipation rate Surface buoyancy flux Internal wave Parameterization
通讯作者	xdshang@scsio.ac.cn
中文摘要	Measurements of the turbulent kinetic energy dissipation rate (epsilon), velocity, temperature, and salinity were obtained for the upper ocean of the central South China Sea (14.5A degrees N, 117.0A degrees E) during an experimental campaign from May 11 to 13, 2010. Dissipation in the diurnal mixed layer showed a diurnal variability that was strongly affected by the surface buoyancy flux. Dissipation was enhanced (epsilon similar to 10(-7) W kg(-1)) at night due to the convective mixing and was weakened (epsilon similar to 10(-9) W kg(-1)) in daytime due to the stratification. Dissipation in the thermocline varied with time under the influence of internal waves. Shear from high-frequency internal waves (period similar to 8 h) played an important role in enhancing the turbulent mixing in the thermocline. In the period of strong high-frequency internal waves, the shear from high-frequency internal waves became strong and the depth-averaged epsilon in the thermocline was elevated by almost one order of magnitude. Compared with the dissipation in the thermocline, dissipation below was weaker (the time-averaged epsilon similar to 10(-10) W kg(-1)). The observation indicates that the dissipation rates during the measurements can be parameterized by the MacKinnon-Gregg model that is widely used in the continental shelf but are not in agreement with the Gregg-Henyey model used for the open ocean.
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/16447]
专题	南海海洋研究所_热带海洋环境国家重点实验室(LTO)
推荐引用方式 GB/T 7714	Liang, CR,Chen, GY,Shang, XD. Observations of the turbulent kinetic energy dissipation rate in the upper central South China Sea[J]. OCEAN DYNAMICS,2017,67(5):597-609.
APA	Liang, CR,Chen, GY,&Shang, XD.(2017).Observations of the turbulent kinetic energy dissipation rate in the upper central South China Sea.OCEAN DYNAMICS,67(5),597-609.
MLA	Liang, CR,et al."Observations of the turbulent kinetic energy dissipation rate in the upper central South China Sea".OCEAN DYNAMICS 67.5(2017):597-609.