Estimation to the turbulent kinetic energy dissipation rate and bottom shear stress in the tidal bottom boundary layer of the Yellow Sea

作者：Liu Zhiyu^*; Wei Hao

来源：Progress in Natural Science, 2007, 17(3): 289-297.

DOI：10.1080/10020070612331343260

• tidal bottom boundary layer
• turbulent kinetic energy dissipation rate
• bottom shear stress
• ADV
• the Yellow Sea

High frequency velocity fluctuations were measured by using an acoustic Doppler velocimeter (ADV) in the tidal bottom boundary layer (BBL) of the Yellow Sea (YS) for 25 h. The turbulent kinetic energy dissipation rate and the bottom shear stress were estimated and analyzed. Results show that: (1) in the tidal BBL of the YS, the variations of the dissipation rate and the bottom shear stress during 25 h are (1.8 x 10(-8)-3.4 x 10(-5)) W . kg(-1) and (6.6 X 10(-4)-7.5 x 10(-1)) N.m(-2) respectively, indicating that there are strong dissipations in the tidal BBL of the YS; (2) in the well-mixed tidal BBL, the turbulence is mainly shear-induced locally and the production and dissipation are generally in equilibrium; (3) for the seas where the semidiurnal tidal current is dominant, both the dissipation rate and the bottom shear stress exhibit a strong quarter-diurnal variation; (4) the mean bottom

• 出版日期2007-3
• 单位中国海洋大学