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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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.
Espiral d’Ekman – Viquipèdia, l’enciclopèdia lliure
Modelling the mixed layer response”. The average direction of all this turning water is about a right angle from the wind direction.
But he did have lots of time to make observations of the environment. The net effect of the rotating water B is movement at right angle to the wind direction. If this file has problems with attributioncopyrightor is otherwise ineligible for Commons, espkral remove this tag and DO NOT transfer it; repeat violators may be blocked from editing.
Wind-induced water movements in a Benguela kelp bed. Views Read Edit View history. Pages on other projects are not listed. Ocean water at the surface moves at an angle to the wind, and the water under the surface water turns a bit ewpiral, and the water below that turns even more.
Ekmaj, the current will reach a top speed when the force of the wind, of the Coriolis effect, and the resistant drag of the subsurface water balance, and the current will flow at a constant speed and direction as long as the wind persists.
Retrieved from ” https: One of his observations was that the ice was not moving in the same direction as the wind. This is due both to the fact that the turbulent mixing in the surface layer of the ocean has a strong diurnal cycle and to the fact that surface waves can destabilize the Ekman spiral.
The force eespiral above is in red beginning with the wind blowing over the water surfacethe Coriolis force which is shown at right angles to the force from above when it should in fact esliral at right angles to the actual water flow is in dark yellow, and the net resultant water movement is in pink, which then becomes the force from above for the layer eespiral it, accounting for the gradual clockwise spiral motion as you move down.
If the file lacks a description you can check edits the uploader made just after uploading this file with this tool. The first documented observations of an oceanic Ekman spiral were made in the Arctic Ocean from a drifting ice floe in Navytaken or made as part of that person’s official duties.
A structure of currents or winds near a horizontal boundary in which the flow direction rotates as one moves away from the boundary.
As a work of the U. Skip to main content. Summary [ edit ] http: Views Read Edit View history.
File mover What files should be renamed? The depth to which the Ekman spiral penetrates is determined by how far turbulent mixing can penetrate over the course of a pendulum day. 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 espirla boundary. This file is a candidate to be copied to Wikimedia Commons. The example shown above is for the Northern Hemisphere.
For three years, Nansen and his ship drifted through the Arctic. In other projects Wikimedia Commons. Surface winds in the Northern Hemisphere tend to blow to the left of winds aloft.
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.
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