The Jovian planets Jupiter, Saturn, Uranus, and Neptune are composed almost entirely of atmosphere. Winds are predominantly zonal, and are driven by sunlight and internal heat.
Mercury and the Moon have collisionless atmospheres caused by impacting solar wind ions in which individual molecules can traverse one scale height, yielding Na on Mercury and K on the Moon.
The atmospheres of Mars and Triton are in equilibrium with the polar frosts. Mars is in equilibrium with , while Triton is in equilibrium with . Gas exchange from the summer to winter pole is subsonic.
Io has a local atmosphere of which is present only over the subsolar point and volcanos. Each frost patch determines its own radiative equilibrium. Venus, Earth, and Titan undergo exchange between the atmosphere and surface. This exchange determines the composition. Weather is driven by the difference between absorbed sunlight and emitted infrared radiation.