= Polar motion
{wiki=Polar_motion}
Polar motion refers to the movement of the Earth's rotation axis in relation to its crust, specifically the shifting position of the North and South Poles. This phenomenon is primarily influenced by various geophysical factors, including changes in atmospheric pressure, ocean currents, and how mass is distributed on and within the Earth. The Earth's rotation axis does not remain fixed; it experiences small oscillations and shifts over time.
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