clear-air turbulence


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clear-air turbulence

(klîr′âr′)
n. Abbr. CAT
Atmospheric turbulence that occurs under tranquil and cloudless conditions and subjects aircraft to strong updrafts and downdrafts.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.clear-air turbulence - strong turbulence in an otherwise cloudless region that subjects aircraft to violent updrafts or downdrafts
turbulence - instability in the atmosphere
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References in periodicals archive ?
The A330-343 Airbus aircraft landed safely at its original destination in Madrid's Barajas airport on Tuesday night after suffering a 15-second episode of clear-air turbulence that made the aircraft plummet a few hundred metres in the sky over Ethiopia.
In mid-July, 35 passengers onboard an Air Canada flight bound to Australia were injured due to clear-air turbulence, the most unpredictable type as it is invisible and nearly impossible to predict, posing a threat to aviation safety.
"Clear-air turbulence occurs because you have invisible paths of air moving at different speeds, and where those two paths meet you end up with heavy currents.
Turbulence severe enough to upend an airplane can arise from at least four distinct sources: thunderstorms, larger aircraft, mechanical interference from topography or buildings, and the unpredictable phantom of clear-air turbulence (CAT).
Atmospheric turbulence relevant to cruising aircraft in the upper troposphere-lower stratosphere (UTLS) is categorized into three different types based on their locations and generation mechanisms: clear-air turbulence (CAT), mountain-wave turbulence (MWT), and convectively induced turbulence (CIT; Fig.
Most of its weather is limited to lots of cirriform overcast and clear-air turbulence. The subtropical jet can dip into the tropical Pacific and carry the air northeast toward the U.S.
German accident researcher Jan-Arwed Richter told dpa the flight by tourist air company Ju-Air may have encountered some dangerous clear-air turbulence. "Even under ideal weather conditions, dangers lurk in the mountains that can have very negative safety consequences for an aeroplane," said Richter, co-founder of the Jet Airliner Crash Data Evaluation Centre in Hamburg.
"Clear-air turbulence changes significantly within the transatlantic flight corridor when the concentration of carbon dioxide in the atmosphere is doubled," the researchers said.
Flight MH1 bound for Kuala Lumpur from London encountered clear-air turbulence over the Bay of Bengal, dpa quoted the airline as saying in a statement.
Clear-air turbulence will increase in main global corridors leading to longer, bumpier flights.
Flight turbulence, more technically referred to as 'clear-air turbulence', is caused due to the meeting of two bodies of air moving at different speeds.