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PolarFront_fastloop_smaller.gif
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The gif linked above shows isosurfaces of the polar front, colored by wind speed. The winds at the surface form many small fronts; the higher altitude winds, the polar jet stream, create a full cyclonic circulation with the rotation of the Earth.
7 Polar Oceanic Front
In the ocean, ice melting from the poles brings light freshwater into contact with dense saltwater. Hence, Earth's rotation causes oceanic fronts to form, creating an anticyclonic circulation.
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Figure 7.1: Left: Surface temperatures of the ocean show a sharp temperature gradient, just as in the atmosphere. Right: Anticyclonic current around Antarctica.