What causes the vivid bands seen in jupiter's upper atmosphere?

Jupiter has two types of bands around it; the zones and the belts.

The zones are the light-colored bands that are formed when the gases of Jupiter's atmosphere rise upwards.

The belts, on the other hand, are the dark-colored bands that are formed when the gases of Jupiter's atmosphere fall downwards.

The colors in these bands are formed as a results of the slight difference between their temperatures as well as the difference in the chemical composition.