how do deep ocean currents form
How do some deep ocean currents form? Deep ocean currents are caused by 3 things:    change in temperature  change in salinity by evaporation  change in salinity by freezing   Because colder water and s â¦ altier water are more dense, they sink,  and the motion causes deep currents. 8 people found this useful. Manny de la Riva. 616,402 Contributions.