The rotating loops of currents that occur in the ocean are referred to as gyres. The Pacific Ocean is the largest ocean in the world.
solar flare
by the earth rotating around the sun while the moon is rotating around the earth.
unequal heating
In fluids and in electrical circuits.
solar flare
They are called the prominence.
They occur when the convection currents are less dense and rise.
Convection currents occur in the mantle, which is the middle layer of the Earth. The heat generated from the core causes the molten rock in the mantle to move in a circular pattern, creating convection currents.
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The mantle.
My best guess is that they occur because of warming and cooling of the surface temperature. I am sure there is a pattern of these deep ocean currents to and from the equator and the poles.