Transient Ekman slope currents and significance of the geostrophic approximation

Ekman傾斜流の発達過程と地衡流近似の課題

Transient Ekman slope currents and significance of the geostrophic approximation

Creators Yasuda Hidekazu

Although the slope current under the Earth rotation effect has been well known at the steady state, the transient developing process of the slope current has not yet reported fully, and thus even the geostrophic current or wind is usually applied at the steady state only. This study has solved the time- dependent slope currents analytically and clarified the developing process from the initial stage. As shown in the previous paper in which the wind driven current has been reported changeable with the inertia period, it is revealed that the slope current is also grown with the inertia-periodical variation and that such variation is kept for a long duration. It might be a warning to the idea of the usual geostrophic current and wind with no consideration of the transient process.

[ISSN]0370-9361