Advection of baroclinic eddies by depth mean flow
Advection of baroclinic eddies by depth mean flow
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DOI：
10.1002/2014gl060001
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发表时间：
2014-05-28
影响因子：
5.2
通讯作者：
Marshall, David P.
中科院分区：
文献类型：
--
作者：
Klocker, Andreas;Marshall, David P.
观察到的非线性涡的纬向传播速度，使用涡跟踪算法得出的，与经典的长Rossby波的速度，多普勒频移的深度平均速度，后者从年平均水文和海洋图集。尽管忽略了斜压背景流的多普勒频移，在南极绕极流区域，观测到的涡旋传播速度和理论上的长Rossby波相速度之间的对应关系得到了改善，两者都显示出以1-3cms-1的速度向东传播，尽管观测到的向东涡旋传播速度系统地低于预测的Rossby波相速度。
Observed zonal propagation speeds of nonlinear eddies, derived using an eddy tracking algorithm, are compared with the classical long Rossby wave speed, Doppler shifted by just the depth mean velocity, the latter obtained from annual mean hydrography and an ocean atlas. Despite neglecting any Doppler shift from baroclinic background flows, the correspondence between observed eddy propagation speeds and theoretical long Rossby wave phase speeds is improved in the Antarctic Circumpolar Current region, where both show eastward propagation at speeds of 1-3cms-1, although the observed eastward eddy propagation speeds are systematically lower than the predicted Rossby wave phase speeds.