What are types of Ocean Currents ?

There are two type of Ocean Currents:

1. Surface Currents–Surface Circulation

These waters make up about 10% of all the water in the ocean.

These waters are the upper 400 meters of the ocean.

2. Deep Water Currents--Thermohaline Circulation

These waters make up the other 90% of the ocean

These waters move around the ocean basins by density driven forces and gravity.

The density difference is a function of different temperatures and salinity

These deep waters sink into the deep ocean basins at high latitudes where the temperatures are cold enough to cause the density to increase.

Ocean Currents are influenced by two types of forces