Answer:
Increasing ocean temperatures cause current speeds to increase.
Step-by-step explanation:
As the temperature of ocean increases, the speed of current is also increases because these currents stored more heat energy that leads to the increase in speed of ocean currents. Due to increase in global temperature, global ocean circulation has been increases since 1990s. The main reason for that is the increase in the concentration of greenhouse gases in the atmosphere that increases the temperature of the environment so the speed of ocean currents also increases.