Modeling study of turbulent mixing over the continental shelf: Comparison of turbulent closure schemes
Modeling study of turbulent mixing over the continental shelf: Comparison of turbulent closure schemes
复制标题
DOI：
10.1029/2001jc001234
复制
发表时间：
2003-03
影响因子：
--
通讯作者：
H. Wijesekera;J. Allen;P. Newberger
中科院分区：
文献类型：
--
作者：
H. Wijesekera;J. Allen;P. Newberger
限制是强加的。在上升有利风期间，大部分湍流混合发生在顶部和底部边界层以及垂直和水平剪切海岸急流附近。海岸急流中的湍流混合主要由剪切产生驱动。由于风应力迫使涌上来的水在表层离岸流动，内大陆架上的近地表流变得对流不稳定。在下沉有利的风，最强的混合发生在附近的下沉锋。最大的湍流动能和耗散被发现的底部附近的锋。前缘离岸底部边界层中的湍流集中在边界层流动中的对称不稳定性所产生的再循环单元之间。索引术语：4219海洋学：概述：大陆架进程; 4568海洋学：身体状况：湍流，扩散和混合过程; 4255海洋学：一般：数值模拟; 4279海洋学：一般：上升流和收敛;
limitation is imposed. During upwelling-favorable winds, the majority of turbulent mixing occurs in the top and the bottom boundary layers and in the vicinity of the vertically and horizontally sheared coastal jet. Turbulent mixing in the coastal jet is primarily driven by shear-production. The near-surface flow on the inner shelf becomes convectively unstable as wind stress forces the upwelled water to flow offshore in the surface layer. During downwelling-favorable winds, the strongest mixing occurs in the vicinity of the downwelling front. The largest turbulent kinetic energy and dissipation are found near the bottom of the front. Turbulence in the bottom boundary layer offshore of the front is concentrated between recirculation cells which are generated as a result of symmetric instabilities in the boundary layer flow. INDEX TERMS: 4219 Oceanography: General: Continental shelf processes; 4568 Oceanography: Physical: Turbulence, diffusion, and mixing processes; 4255 Oceanography: General: Numerical modeling; 4279 Oceanography: General: Upwelling and convergences;