The ice polar caps will melt if the earth warms significantly. Around the world, water will disperse from the poles, close to the axis of revolution.
If the polar ice caps melt, water would flow throughout the world, increasing its moment of inertia. However, due to the rule of conservation of momentum, rotational speed would slow down to ensure that angular momentum is constant. The length of the day would lengthen as the speed of rotation decreased. Coastal flooding and storm surge are made more dangerous by rising seas, endangering coastal cities and small island nations. The Greenland ice sheet's glacial melt is a key indicator of future sea level rise.
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