In a stable atmosphere:

Question

Quizplus · Accepted Answer

In a stable atmosphere, an air parcel that is displaced vertically will experience a restoring force that will cause it to move back towards its original position. This is because the displaced parcel will be either colder (if it was lifted) or warmer (if it was lowered) than its surroundings and will be denser or less dense than the surrounding air. This density difference will cause the parcel to experience a buoyant force that will tend to push it back towards its original position.

In a Stable Atmosphere