Anisotropic geophysical vortices

被引:24
|
作者
McWilliams, James C. [1 ]
Weiss, Jeffrey B. [2 ]
机构
[1] NCAR, Geophys Turbulence Program, Boulder, CO 80307 USA
[2] Univ Colorado, Program Atmospher & Ocean Sci Astrophys Planetary, Boulder, CO 80309 USA
基金
美国国家科学基金会;
关键词
D O I
10.1063/1.166010
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
A survey is made of many types of coherent vortices in the Earth's ocean and atmosphere. These vortices often occur with strong, environmentally induced anisotropy in their velocity and vorticity fields. We propose a definition of the essential characteristics of coherent vortices and formulate hypotheses concerning their dynamical role in complex, anisotropic fluid motions. Finally, we analyze numerical solutions both for uniformly rotating, stably stratified three-dimensional flow and for two-dimensional flow for the phenomena of enstrophy cascade and dissipation, intermittency, isotropy in the appropriate coordinate frame, coherent vortex emergence, vortex population dynamics, and approach to a nonturbulent end state.
引用
收藏
页码:305 / 312
页数:8
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