Question

what are the reason responsible for the formation of deep ocean current.

Answer 1

Deep ocean currents are driven by density and temperature gradients. ... Because the movement of deep water inocean basins is caused by density-driven forces and gravity,deep waters sink into deep ocean basins at high latitudes where the temperatures are cold enough to cause the density to increase.

Answer 2

These deep-ocean currents are driven by differences in the water's density, which in turn is controlled by temperature (thermo) and salinity (haline). This process is known as thermohaline circulation. In the Earth's polar regions ocean water gets very cold, forming sea ice. ... Solar heating causes water to expand.