clear-air turbulence: meaning, definition, pronunciation and examples
LowTechnical
Quick answer
What does “clear-air turbulence” mean?
Sudden, severe turbulence experienced by aircraft flying in cloudless, or 'clear', air, typically at high altitudes.
Audio
Pronunciation
Definition
Meaning and Definition
Sudden, severe turbulence experienced by aircraft flying in cloudless, or 'clear', air, typically at high altitudes.
A phenomenon in aviation where strong wind shear or atmospheric disturbance occurs without visual cues like clouds, making it difficult to predict or detect; often used metaphorically to describe unexpected difficulties emerging in a seemingly calm situation.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Spelling of compound may vary slightly with more frequent hyphenation in British English ('clear-air') versus potential solid or open forms in American English ('clear air turbulence').
Connotations
Identical technical connotations in both dialects.
Frequency
Equally low-frequency outside aviation circles; slightly higher frequency in American English due to larger aviation media landscape.
Grammar
How to Use “clear-air turbulence” in a Sentence
The plane encountered clear-air turbulence.Clear-air turbulence is caused by...There were reports of clear-air turbulence over...Vocabulary
Collocations
Examples
Examples of “clear-air turbulence” in a Sentence
verb
British English
- The aircraft was clear-air turbulenced (non-standard, avoid).
American English
- The plane got clear-air-turbulenced (non-standard, avoid).
adjective
British English
- A clear-air turbulence event (noun compound used attributively).
American English
- Clear-air turbulence conditions (noun compound used attributively).
Usage
Meaning in Context
Business
Metaphor for unforeseen market or operational disruptions ('The project hit clear-air turbulence after the CEO resigned.').
Academic
Discussed in meteorology, aviation physics, and atmospheric science papers.
Everyday
Rare. Might be used by frequent flyers or in news reports about a specific flight incident.
Technical
Core term in aviation meteorology, pilot reports (PIREPs), and flight safety manuals.
Vocabulary
Synonyms of “clear-air turbulence”
Strong
Neutral
Weak
Vocabulary
Antonyms of “clear-air turbulence”
Watch out
Common Mistakes When Using “clear-air turbulence”
- Misspelling as 'clear air-turbulence'. The hyphen should link 'clear-air'.
- Using it as a verb ('The plane was clear-air turbulencing').
- Confusing it with turbulence in storms (cumulonimbus).
FAQ
Frequently Asked Questions
Yes, modern aircraft use radar and LIDAR systems to detect some signs ahead, but it remains notoriously difficult to predict with complete accuracy.
It can be very dangerous as it is severe and unexpected, posing a risk of injury to unbuckled passengers and crew.
It is most common at high cruising altitudes, typically above 15,000 feet, often near the jet stream.
All clear-air turbulence is turbulence, but not all turbulence is 'clear-air'. The latter specifically occurs in clear skies, without visual warning from clouds.
Sudden, severe turbulence experienced by aircraft flying in cloudless, or 'clear', air, typically at high altitudes.
Clear-air turbulence is usually technical in register.
Clear-air turbulence: in British English it is pronounced /ˌklɪə‿eə ˈtɜːbjələns/, and in American English it is pronounced /ˌklɪr‿ɛr ˈtɜːrbjələns/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “[Metaphorical] 'The merger hit a patch of clear-air turbulence.' - meaning unexpected internal problems.”
Learning
Memory Aids
Mnemonic
Think: 'CLEAR' sky + 'AIR' + 'TURBULENCE' = trouble you can't see coming because the air looks clear.
Conceptual Metaphor
INVISIBLE DANGER / UNSEEN OBSTACLE (The path ahead looks safe, but hidden forces cause sudden disruption.)
Practice
Quiz
What is the defining characteristic of clear-air turbulence?