Answer: Winds are primary energy source for currents that flow horizontally in the ocean surface layers (less than 100 to 200 m deep). Hence surface currents often called âwind driven currentsâ or âwind drift currentsâ.
Currents that flow deep in the oceans below the level affected by winds are generated by convection caused by variations in water density. Higher-density waters sink and displace (push aside or up) less âdense water. Because density is determined by temperature and salinity, deep-water circulation is called âthermohaline circulationâ.
The winds are the primary source for both âwind driven circulationâ and âthermohaline circulationâ is the sun. Winds are generated by the density variations in the earthâs atmosphere caused by solar heating and radiative and evaporative cooling.
Thermohaline circulation is driven by density difference between ocean water masses caused by temperature and salinity variations.
Explanation:
This is the main cause to form a wave over the sea surface.