Рис. spirale f d ́Ekman s espiral f de Ekman g Ekman-Spirale f El Niño; southern oscillation The abnormal warming of ocean water off the west coast of. Vagn Walfrid Ekman Category:Ekman spiral cawiki Espiral d’Ekman; dewiki Korkenzieherströmung; enwiki Ekman spiral; eswiki Espiral de Ekman; etwiki. elbow EHT~; – rectffier u TV válvula rectificadora de MAT/; – supply n rv spiral n OCEAN espiral de Ekman m elaeolite n MINERAL eleolita / nefelma.
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The classic Ekman spiral has been espiiral under sea ice,  but observations remain rare in open-ocean conditions. The Ekman spiral is a structure of currents or winds near a horizontal boundary in which the flow direction rotates as one moves away from the boundary.
The net effect of the rotating water B is movement at right angle to the wind direction. Wikimedia Commons has media related to Ekman spiral.
Ekman spirals are also found in the atmosphere. If this media file is useful, then it should be transferred to the Wikimedia Commons. This page was last edited on 25 Augustat File mover What files should be renamed?
How Seawater Moves: Ekman Transport
He thought that trapped in sea ice, which moves with ocean currents, he would get to the North Pole eventually. From Wikipedia, the free encyclopedia. This surface current drags on the water layer below it, applying a force in its own direction of motion to that layer, repeating the process whereby that layer eventually becomes a steady current even further to the right of the wind, and so on for deeper layers of water, resulting in a continuous rotation or spiraling of current direction with changing depth.
Surface espural in the Northern Hemisphere tend to blow to the left of winds aloft. Journal of Geophysical Research. Common to several of these observations spirals were found to be ‘compressed’, displaying larger estimates of eddy viscosity when espirral the rate of emman with depth than the eddy viscosity derived from considering the rate of decay of speed. An Ekman spiral A is a rotating column of water that forms when water moves at an angle to the wind direction due to the Coriolis Effect.
The example shown above is for the Northern Hemisphere. Because the Earth rotates, surface water moves to the right of the wind direction in the Northern Hemisphere and to the left of the wind direction in the Southern Hemisphere due to the Coriolis effect. Thus, when a persistent wind blows over an extended area of the ocean surface in the northern hemisphere, it causes a surface current which accelerates in that direction, which then experiences a Coriolis force and acceleration to the right of the wind: Views Read Edit View history.
This makes a spiral of moving water to meters to ft deep called an Ekman spiral. PD Public domain false false. Wind-induced water movements in a Benguela kelp bed.
Ekman spiral – Wikimedia Commons
From Wikipedia, the free encyclopedia. This average is Ekman transport.
Please verify that this file is suitable for Commons before transferring it. Views Read Edit View history. The effect is a consequence of the Coriolis effect which subjects moving dee to an apparent force to the right of their direction of motion in the northern hemisphere and to the left in the Southern Hemisphere.
Any user may perform this transfer; refer to Wikipedia: The depth to which the Ekman spiral penetrates is determined by how far turbulent mixing can penetrate over the course of a pendulum day. It derives its name from the Swedish oceanographer Vagn Walfrid Ekman. It was moving consistently to the right of the wind direction.
On the influence of the Earth’s rotation on ocean currents. If this file is freely licensed, but otherwise unsuitable for Commons e. The deflection of surface currents was first noticed by the Norwegian oceanographer Fridtjof Nansen during the Fram expedition — and the effect was first physically explained by Vagn Walfrid Ekman. Summary [ edit ] http: Walfrid Ekman who first described the spiral in As a work xe the U.
Espiral d’Ekman – Viquipèdia, l’enciclopèdia lliure
An explorer from Norway named Fridtjof Nansen froze his ship into the Arctic sea ice in In other projects Wikimedia Commons.
If this file has problems with attributioncopyrightor is otherwise ineligible for Commons, then remove this tag and DO NOT transfer it; repeat violators may be blocked from editing. He did this on purpose.
To help him make a mathematical model of these movements, Ekman used the observations that Fridtjof Nansen made while frozen into the Arctic sea ice. As the flow is now somewhat right of the wind, the Coriolis force perpendicular to the flow’s motion is now partly directed against the wind. The Ekman epsiral and Ekman transport are named for Swedish scientist V.