Potential Vorticity Mixing

位涡混合

• 批准号: 9529824
• 负责人: William Young
• 金额: $ 32.67万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-11-01 至 2000-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9529824&HistoricalAwards=false
• 关键词: Potential; Vorticity; Mixing

9529824 Young A mechanistic understanding of potential vorticity mixing and homogenization will be developed by constructing streamfunctions that are solutions of the equations of motion, and in which particle trajectories exhibit sensitive dependence on ilitial conditions. The main objective is to show that critical layer absorption of Rossby waves radiated by meandering boundary currents leads to irreversible deformation of potential vorticity and the potential vorticity homogenization of the flanking recirculating gyres. Another objective of this study is to examine potential vorticity in zonal flows, and in particular the marginal stability and potential vorticity evolution during the nonlinear equilibration of unstable waves.

9529824杨将通过构造流函数来发展对潜在涡量混合和均化的机械理解，流函数是运动方程的解，其中粒子轨迹显示出对重力条件的敏感依赖。主要目的是说明弯曲边界流辐射的Rossby波的临界层吸收导致位涡的不可逆变形和侧翼环流的位涡均匀化。这项研究的另一个目的是研究纬向流中的位涡，特别是不稳定波非线性平衡过程中的边界稳定性和位涡演变。