Definitions for "Clear-air turbulence"
Turbulence encountered by aircraft when flying through air space devoid of clouds. Thermals and wind shear are the main causes.
strong turbulence in an otherwise cloudless region that subjects aircraft to violent updrafts or downdrafts
Turbulence encountered by aircraft when flying through air space devoid of clouds. Thermals and windshear are the main causes of clear-air turbulence; and recent studies have shown correlation between the position of the jet stream and reported occurrences of high-altitude clear-air turbulence.