Answer the following questions:

What are the reasons responsible for the formation of deep ocean currents?

Deep ocean currents are those water currents which flow beyond the depth of 500m. They constitute about 90% of the ocean water. They are driven by density and temperature gradients. This is also known as thermohaline circulation. The difference in temperatures of various parts of the ocean results into formation of the deep-sea currents. Warm water that has lower density comes to the surface of the sea while the Coldwater with high density goes down.