Saturday, October 25, 2008
Ekman transport
Here I'm putting another post about ocean currents. This time is is about the Ekman transport. Wind moves water, which is pretty evident, but I didn't realize that Fridtjof Nansen, the guy whom stuck his boat into the ice to prove his theory that polar ice did flow, taught Vagn Ekman, the guy whom first describe what we know as the structure called the Ekman spiral and the event known as the Ekman Transport.
The Ekman spiral tells us that the direction of water movement changes with increasing depth. It is a deflection process where each moving layer is deflected to the right of the overlying layers movement. This has to do with the Coriolis force and its deflecting properties. Ekman transport is the coupling between wind and surface water. I think it forms the basic structure of gyres.
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