Currents caused by temperature and salt levels are called thermohaline currents. Thermohaline currents is part of a oceanic circulation that changes the flow and pressure of the current. The thermohaline current is also called the ocean conveyor belt because of its constant and steady flow.
The blowing of the wind causes ripples on the surface of the ocean, which were once thought of as non-influential and unimportant, but after much research, was shown to have a significant impression on the flow of the current. In deep ocean levels, the change of density caused by salinity and changes of temperature causes the rise and fall of the water as this changes.