clear-air turbulence
[ kleer-air ]
/ ˈklɪərˈɛər /
noun
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
First recorded in 1950–55
Words nearby clear-air turbulence
clear the air,
clear the decks,
clear the table,
clear up,
clear with,
clear-air turbulence,
clear-coating,
clear-cut,
clear-eye,
clear-eyed,
clear-fell
Scientific definitions for clear-air turbulence
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.