The Planets.com

Planet Jupiter Ammonia Ice Near the GRS Return to Jupiter
The light blue region to the upper left of the Great Red Spot is the first ammonia ice cloud positively identified on Jupiter. This unusual cloud is produced by powerful updrafts of ammonia-laden air from deep within Jupiter's atmosphere. This false-color image was composed from near-infrared images taken by the Galileo spacecraft on June 26, 1996.