Winds are able to move the top 400 meters of the ocean creating surface ocean currents. Surface ocean currents form large circular patterns called gyres. Gyres flow clockwise in Northern Hemisphere oceans and counterclockwise in Southern Hemisphere oceans because of the Coriolis Effect.
In this regard, how density currents are formed?
density current A current that is produced by differences in density. Where a flow of sea water has a greater density than that surrounding it, the denser water will dive beneath the less dense water. The density of sea water is affected by temperature, salinity, and the content of suspended sediment.
Where do density currents form?
Density currents in nature are exemplified by those currents that flow along the bottom of oceans or lakes. Such subaqueous currents occur because some of the water in an ocean or lake is colder or saltier or contains more suspended sediment and, thus, is denser than the surrounding waters.
How do differences in density cause ocean currents?
Ocean currents can be generated by wind, density differences in water masses caused by temperature and salinity variations, gravity, and events such as earthquakes. Currents are cohesive streams of seawater that circulate through the ocean.