Dynamics of separating western boundary currents in ocean models
Dynamics of separating western boundary currents in ocean models
复制标题
海洋模型中分离西边界流的动力学
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
A. Kiss
中科院分区：
文献类型：
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作者：
A. Kiss
在一个风生副热带海洋涡旋的两层准地转模式中，研究了西边界流(WBC)分离动力学。结果表明，近岸薄气旋层中的涡度在WBC分离机制中起着关键作用。结果表明，在拉普拉斯粘性和涡度通量散度的共同作用下，西边界流出流是气旋性涡度向下游迅速减弱的区域。这些结果与早期关于层流、非分层白细胞动力学的工作一致，并将这些发现扩展到更现实的湍流、分层流动的情况。
Western boundary current (WBC) separation dynamics are investigated in a two-layer quasigeostrophic model of a wind-driven subtropical ocean gyre. The results suggest that the vorticity in the thin cyclonic layer next to the coast plays a key role in the WBC separation mechanism. It is found that the outflow from the western boundary current is a region where this cyclonic vorticity diminishes rapidly downstream, through the combined action of Laplacian viscosity and eddy vorticity flux divergence. These results are consistent with earlier work on laminar, unstratified WBC dynamics, and extend those findings to the more realistic case of turbulent, stratified flow.