Answer :
A poleward moving (northward moving in the Northern Hemisphere) ocean current is: a warm current.
- Here Ocean currents are the continuous, predictable, directional movement of seawater driven by gravity, wind (Coriolis Effect), and water density. Ocean water moves in two directions: horizontally and vertically. Horizontal movements are referred to as currents, while vertical changes are called upwellings or downwellings.
- Currents are referred to by their “drift”. Usually, the currents are strongest near the surface and may attain speeds over five knots. At depths, currents are generally slow with speeds less than 0.5 knots. The speed of a current as its “drift.” Drift is measured in terms of knots.
example = Kuroshio current also known as Japan current is a north-flowing ocean current on the west side of the North Pacific Ocean. It transports the warm water northwards towards the polar region. The warm waters of the Kuroshio Current sustain the coral reefs of Japan, the northernmost coral reefs in the world.
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