This is a drawing depicting the motions in earth's atmosphere.
Click on image for full size
Image from: Random House Atlas
Motions in Saturn's Interior
Motions in the interior of a planet help carry heat from the inside to the outside.
The drawing to the left illustrates a kind of global motion that is typical of motions in the atmosphere as well as interior of a planet. Material rises from where it is warmest, and moves in a roiling motion like the boiling of a pot. In the drawing, there are three different cells of activity in the atmosphere where the air turns over (depicted by red sheets).
In the interior of Saturn, the liquid layers are warm enough to move in this fashion. Some scientists think, however, that the heat from within Saturn causes different sorts of motions.
In any case, the enormous magnetosphere of Saturn is produced by motions in the liquid metallic hydrogen layer inside Saturn.
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