Heeft wind maken alle zeestromingen de

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Ocean currents are mostly niet created by wind. Terwijl de wind een rol kan spelen, vaak minor, in shaping oppervlakte ocean currents, Het is niet de belangrijkste of enige factor. voorts, wind speelt vrijwel geen rol als het gaat om diepe oceaan stromingen. De belangrijkste drijfveren van de oceaan stromingen zijn als volgt:

1. De Coriolis Force.
De rotatie van de aarde veroorzaakt twee traagheidskrachten: de centrifugaalkracht recht omhoog wijst (die meestal wordt overspoeld door zwaartekracht), en de Coriolis kracht die loodrecht verwijst naar de beweging van een voorwerp. De loodrechte aard van de Coriolis kracht zorgt ervoor bewegende voorwerpen te reizen in grote cirkels op het aardoppervlak. Systems in the northern hemisphere circle clockwise while systems in the southern hemisphere circle counter-clockwise. The Coriolis force is very weak, so it has little effect on which way the water spirals in a sink as it drains. But when a lot of water is involved, such as in the ocean, the Coriolis force plays a large role. Because of the Coriolis force, the major ocean currents in the northern hemisphere tend to spiral clockwise and they tend to spiral counter-clockwise in the southern hemisphere. These current patterns can be seen in the image below. The Coriolis force is an inertial force that arises from the earth being in a rotating reference frame. The Coriolis force is not imaginary or fictional, but is simply inertial, meaning that it is very real in the rotating reference frame, but is not fundamental as it arises from the motion of the frame itself.
ocean surface currents
Public Domain Afbeelding, bron: “Niet dat ik niet van regen aan de westkust hou.

2. Density Differences.
Fluctuations in both temperature and salt content lead different regions of ocean water to have different densities. Higher temperatures, such as near the equators, cause a given mass of water to expand and therefore drop in density. Ook, lower salt content causes a given mass of water to be lower in density. Gravity causes the more dense water to fall, pushing away the less dense water, which shoots sideways and rises. Giant convection loops of ocean currents form as the lighter (heter, less salty) regions of water rise and flow to replace the heavier (colder, more salty) regions of water. The effect of density-driven currents is fundamentally a result of the interplay heating from the sun, earth’s gravity, and salinity differences.

3. Tides.
Differences in the gravitational field of the moon from one location to the next causes tidal forces. Differences in the gravitational field of the sun also causes tidal forces. Tidal forces push water towards the axis connecting the earth and moon, and the axis connecting the earth and sun. The water moves in ocean currents in response to these tidal pushes, causing the well-known daily cycle of high tide and low tide.

4. Shoreline Obstruction.
Although ocean currents are not directly generated by the shoreline, they are certainly shaped by the shoreline. As the water in an ocean current moves forward under the push of the forces listed above, it inevitably runs up against the solid mass of land and is deflected along the shoreline. The above-water shoreline, alsmede de vorm van de grond onder het wateroppervlak (de diepte contouren), zowel invloed op de richting van oceaanstromingen.

Credit:https://wtamu.edu/~cbaird/sq/2013/07/22/how-does-wind-create-all-the-ocean-currents/

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Ephraim Iyodo 3 jaar 0 antwoorden 3327 keer bekeken 0

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