clear-air turbulence
noun Date: 1955 sudden severe turbulence occurring in cloudless regions that causes violent jarring or buffeting of aircraft

New Collegiate Dictionary. 2001.

Look at other dictionaries:

  • clear-air turbulence — Turbulence in clear air, which is not a result of the presence of clouds or thermal heating of the ground. It appears to arise from an internal function of the atmosphere resulting from wind shear and perhaps temperature shear. Clear air… …   Aviation dictionary

  • clear air turbulence — clear air turbulence, a violent disturbance in air currents, caused by rapid changes of temperature associated with the jet stream. Clear air turbulence is characterized by severe updrafts and downdrafts that affect jet aircraft flying at high… …   Useful english dictionary

  • clear air turbulence — n. turbulent air, not associated with a storm, that affects the flight of aircraft * * * …   Universalium

  • clear air turbulence — n. turbulent air, not associated with a storm, that affects the flight of aircraft …   English World dictionary

  • Clear-air turbulence — For other uses, see Clear Air Turbulence (disambiguation). Clear air turbulence (CAT) is the turbulent movement of air masses in the absence of any visual cues such as clouds, and is caused when bodies of air moving at widely different speeds… …   Wikipedia

  • Clear Air Turbulence — For other uses, see Clear Air Turbulence (disambiguation). Clear Air Turbulence art by Chris Foss Studio album by Ian Gillan Band …   Wikipedia

  • Clear Air Turbulence — Die Clear Air Turbulence (abgekürzt CAT) bzw. Reinluftturbulenz oder Klarsichtturbulenz bezeichnet Luftturbulenzen in Bereichen ohne sichtbare Wolkenphänomene. Sie führen zu einer ungewollten Höhenänderung eines Flugzeugs und werden von… …   Deutsch Wikipedia

  • clear-air turbulence — /klear air / atmospheric turbulence, sometimes severe, occurring in air devoid of clouds or other visible indicators that turbulence might be present. Abbr.: CAT [1950 55] * * * ▪ atmospheric science       erratic air currents that occur in… …   Universalium

  • clear-air turbulence — noun strong turbulence in an otherwise cloudless region that subjects aircraft to violent updrafts or downdrafts • Hypernyms: ↑turbulence * * * ¦ ̷ ̷ ¦ ̷ ̷ noun : sudden severe turbulence occurring in cloudless regions that causes violent jarring …   Useful english dictionary

  • clear-air turbulence — noun The erratic movement of air masses in the absence of any visual cues, especially such movement that causes unexpected turbulence to an aircraft …   Wiktionary

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