The great circulations in the ocean basins occur around the "subtropical high" pressure systems and are known as "gyres".
What is gyres?
Ocean gyres are massive systems of circular ocean currents that are formed by the Earth's rotation and the patterns of the world's winds.
- An ocean circulation system that rotates counterclockwise in the Southern Hemisphere and clockwise in the Northern Hemisphere is known as a subtropical gyre.
- The ocean's surface is swept by the wind, which causes the water to flow in its direction.
- Ocean currents that connect as they follow the coastlines of the Earth's continents make up the movement of gyres.
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