Cloud microphysics of the giant planets

Abstract

The NH3 clouds on Jupiter and Saturn are found to be weakly precipitating systems, similar to the thicker cirrus clouds on Earth, while the H2O clouds are much more massive than water clouds on Earth. The NH4SH clouds are very tenuous on Jupiter and Saturn but may produce precipitation on Uranus and Neptune. The CH4 and H2O clouds on Uranus and Neptune are completely unlike any cloud on Earth, being 10-100 times more massive than the densest water clouds on Earth. -from Authors