The sun.
The two causes of ocean currents are wind and the rotation of the earth(etc) The wind blows which makes the currents in the water and the rotation of the earth(gravity) makes currents in the ocean currents. Luaye Sharawy
its caused by the moon
In electricity? High voltage ,high currents. Low voltage, low currents.
Currents in the coastal water masses
the heat in the core raises and heat raises to a cold spot. so the convection currents raises to the surface of the earth.
Randomism .
waves
convection currents!
changing in heat in the ocean colder sinks warmer floats
It is from differing temperatures of air above it that causes currents to flow in the water.
ThE ocean currents