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.
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
References in periodicals archive ?
The onboard clear-air turbulence detection system to be tested in the program next year was established by JAXA as part of our SafeAvio R&D project on avionics safety technology to prevent turbulence-induced aircraft accidents," said Fumikazu Itoh, director general, JAXA Aeronautical Technology Directorate.
Recent studies have shown that the most common altitude for clear-air turbulence per flight hour tends to peak at FL350, with moderate to severe turbulence preferring FL300.
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.
More study is needed, he said, but the impacts on aviation in the coming decades "could be more clear-air turbulence, resulting in a bumpier ride for passengers.
His research on clear-air turbulence forecasting has been funded by NASA and NOAA and was honored by the National Weather Association in 2010 with its Fujita Research Achievement Award.
That is making the atmosphere more vulnerable to the instability that creates clear-air turbulence," he told AFP by e-mail.
There is evidence that clear-air turbulence has already risen by 40-90% over Europe and North America since 1958, but that is set to increase further due to global warming.