The surface of Saturn bears many similarities with the surface of Jupiter, but the color contrast is generally less. This is thought to be due to Saturn being colder than Jupiter (further from the Sun), so it has different chemical reactions in its atmosphere, leading to different coloration.
There are large anticyclonic cells on the surface, apparently driven by the planet's internal heat source, but none are as large as the Great Red Spot on Jupiter, and they are not as abundant as on Jupiter. The image adjacent left shows a red anticyclonic disturbance about the diameter of the Earth.
Storms on Saturn
The adjacent animation shows a sequence of Hubble Space Telescope
images of the Great White Spot,
a disturbance discovered in 1990 that can extend completely around the
planet. The same storm is illustrated with greater smoothness in this
Hubble Space Telescope
The magnetic field of Saturn is similar
to that of Jupiter, but weaker. Electrical currents in liquid metallic
hydrogen deep in the interior are assumed to be the cause of the magnetic
field. The magnetic field traps charged particles
in "Van Allen belts" similar to that of the Earth.
(Jupiter also traps particles but the belts are more extended
in radius and thus are more like annular sheets. Saturn
has less extensive of a trapped charged particle region than