Frictional effects in wind-driven ocean currents
Frictional effects in wind-driven ocean currents
复制标题
风驱动洋流中的摩擦效应
DOI:
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
A. Constantin
中科院分区:
文献类型:
--
作者:
A. Constantin
Surface ocean currents have a significant influence on the climate and their dynamics depend to a large extent on the behaviour of the vertical eddy viscosity. We present an analytic study of wind-driven surface currents for general depth-dependent vertical eddy viscosities. A novel formulation for Ekman-type flows, that relies of a transformation to polar coordinates, enables us to show that in the Northern Hemisphere the horizontal current profile decays in magnitude and turns clockwise with increasing depth, irrespective of the vertical variations in diffusivity. Using a perturbation approach, we also derive a formula for the deflection angle of the current at the surface from the wind direction and discuss its implications.
影响因子:
3.5
作者:
Polton J
通讯作者:
Polton J