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clear-air turbulence

[kleer-air] /ˈklɪərˈɛər/
noun
1.
atmospheric turbulence, sometimes severe, occurring in air devoid of clouds or other visible indicators that turbulence might be present.
Abbreviation: CAT.
Origin of clear-air turbulence
1950-1955
1950-55
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for clear-air turbulence
  • clear-air turbulence in the upper troposphere is important to aviation and military operations.
clear-air turbulence in Science
clear-air turbulence
  (klîr'âr')   
Atmospheric turbulence that occurs under tranquil and cloudless conditions at high altitudes near jet streams, mountain ranges, and developing storm systems. It subjects aircraft to strong updrafts and downdrafts.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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