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.

The independent variable would be the fertilizer as it is what the dependent variable (the growth of grass) depends on.