For example, a rotating tank with an ice bucket in the center can represent the Earth, with a cold pole simulated by the ice bucket.

An alternative view is that it was made by winds coming off the cold pole.

- But if the effect was global, what of the cold poles?

From the Enterprise's present orbit he couldn't see either the hot or the cold pole, but he was willing to bet there would be outposts there as well.

But he walked forward, knelt beside Human, curled his fingers around the same cold smooth pole that Human held, tilted back his head, and let his voice come out.

The warm, moist air of the sunniest tropics rises and, following physics, flows toward the cold poles.

Strong winds blow during the summer and winter, from the hot to the cold pole; few winds during the spring and fall.

He was at the East Pole, and it was a very cold pole with the coldest sort of snow and ice all over it.

A little heat, that is, a little motion, is all that differences the bald, dazzling white, and deadly cold poles of the earth from the prolific tropical climates.

The difference in temperature means that ice preferentially sublimates from Cassini, and deposits in the bright areas and especially at the even colder poles.