Currents, like the ones seen flowing in the
photo can be generated via a number of ways. The first way is through water
accumulating by the coastline, resulting in a slightly elevated sea level
than the ocean surrounding. Next, variation in the density of seawater plays a role
in affecting deeper zones beneath the surface layer, and the foremost source of
ocean currents is the frictional drag on the surface of the water. With the
water subject to its force, Coriolis then manoeuvres surface currents to flow at
angles of 45 degrees right or left depending on the hemisphere (North and
South).
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