Effects of Ocean Currents:
[A] Influence on climate
Oceans currents closely influence the distribution of temperature, pressure, winds and precipitation, which directly or indirectly influence the economy and society of the people, especially those living in the coastal regions.
Some of the important effects of oceans currents are as follows:
Currents move from warm temperature areas to colder temperature areas and vice versa.
As they move from one place to another they partly attempt to modify the temperature.
The temperature of a mass of water affects the temperature of the air above it.
Therefore, the ocean current that moves from the equatorial region to the colder latitudes raises the temperature of the air in the areas into which it moves.
When cold and warm currents meet they produce mist and fog.
For example, near Newfoundland warm Gulf Stream meets Labrador Current and produces fog.
They also create conditions for storms.
[B] Influence on marine Life
Temperature determines the type of flora and fauna.
The areas where warm and cold currents meet are among the most important fishing grounds of the world.
The oceanic movement in the form of currents helps in the dispersal of marine life.
[C] Influence on Trade
Ocean currents influence the trade.
The ports and harbours of higher latitudes which are affected by warm currents are ice free and open for trade all the year round.
For example, the ports of North Western Europe remain open throughout the year while port of Quebec in Canada gets frozen in winters.