National Geographic : 1981 Jul
- 800 - 70° - 60° -50° LAND ASBUTTERSCOTCH, 40 30° - 20° 10° 0 ° The atmosphere: storm beneath the calm BLAND AS BUTTERSCOTCH, or so Saturn'satmosphere,composed main ly of hydrogen and helium, appeared from a distance in true color (above). When resolved into detailby imaging en hancement (right), it resembles turbu lentJupiter's. UnlikeJupiter'satmosphere,reversals in wind directions do not coincide with the junctures of dark belts and light zones. Saturn's equatorialwind speeds are three times those on Jupiter, or ten times hurricane-force winds on Earth. Whether the sombrero effect of ring shadow or seasonalvariationsplay sig nificant roles in atmosphericcirculation is notyet clearto mission scientists.