A current it is something that runs or flows. It Marine, for its part, is linked to sea: a body of salty water. The idea of marine current, in this way, refers to the surface movement of sea water.
Ocean currents have various causes. The action of the wind, the movement of rotation what does the planet do Land and the characteristics of coasts are some of the reasons that generate the existence of marine currents.
It is important to note that ocean currents involve not only displacements horizontal of the Water, but also vertical. Several decades ago, researchers discovered that the planet’s ocean currents are structured in three dimensions:
* On the one hand, horizontal movements are observed on the surface that mainly involve the inertia generated by the Earth’s rotation and the wind;
* vertical movements, for their part, alter the effects of rotation terrestrial due to the configuration of the coasts and the underwater relief, so that a centrifugal force is produced that tends to concentrate, as it were, the oceanic level on the entire circumference of the Equator.
We must clarify that it is known as centrifugal force, in accordance with the provisions of the mechanics Newtonian and the classical, to a fictitious force that occurs in the description of the movement that a body performs in a reference system that is rotating. It is also possible to define this concept as the apparent force observed by an observer in which Newton’s laws of motion do not apply, which is also found in a rotating reference frame.
On the other hand, it can differentiate between different classes of currents according to their characteristics. The cold ocean currents, as their name suggests, they involve the displacement of waters that are at low temperatures. They are due to the rotational movement of the Land and they develop from east to west due to the rise of cold water that comes from very deep areas. The Humboldt current, which is also known as Peru stream, is an example of cold current. The German Alexander von Humboldt he was the one who first described this ocean current.
The warm ocean currents, on the other hand, they originate in the intertropical region, originating on the eastern coasts and advancing in the opposite direction to the rotation of the planet. The Gulf Stream, originated in the Gulf of mexico, it is a warm stream.
The ocean currents, on the other hand, they register a constant movement because they are due to the earth’s rotation, unlike the wave currents (related to wind) and tidal currents (linked to the attraction exerted by the Moon), among others whose displacements vary.
One of the uses that humans have found in ocean currents is the extraction of Energy, especially in the deeper areas, and for this he has been developing specific devices for a long time. It is necessary to clarify that this process involves a very high economic investment, which includes the manufacture of the machinery, its installation and the inevitable maintenance tasks.
To offset these costs, the Polytechnic University of Madrid presented at the beginning of 2018 a series of designs and procedures that promise considerable savings. In addition to Spain, another country that is working on obtaining energy from marine currents is Canada, where there are already several experimental parks with first-generation devices, which are placed in the bottom from sea.
Some experts point out that around 80% of this energy is found beyond 40 meters of depth, and that is why the production of the extraction devices is so expensive.