Clear-Air Turbulence (often abbreviated CAT and sometimes colloquially referred to as "air pockets") is the erratic movement of air masses in the absence of any visual cues (such as clouds).
turbulence length scales"Measures of the eddy scale sizes in turbulent flow. The separation between the largest and smallest sizes is determined by the Reynolds number.
turbulence - 1. Irregular fluctuations occurring in fluid motions. It is characteristic of turbulence that the fluctuations occur in all three velocity components and are unpredictable in detail; however, ...
Turbulence - irregular atmospheric motion especially when characterized by up and down currents ...
TURBULENCE The irregular and instantaneous motions of air which is made up of a number of small of eddies that travel in the general air current. Atmospheric turbulence is caused by random fluctuations in the wind flow.
Turbulence
A state of fluid flow in which the instantaneous velocities exhibit irregular and apparently random fluctuations. Theses fluctuations are capable of transporting atmospheric properties.
Turkey tower ...
TURBULENCE: Disrupted flow in the atmosphere that produces gusts and eddies.
UKMET: United Kingdom forecast model.
Turbulence
Irregular motion of the atmosphere, as indicated by gusts and lulls in the wind.
Turkey Tower ...
Turbulence
(Turbulent Flow) Random and continuously changing air motion which are superposed on the mean motion of the air.
Turbulence Any irregular or disturbed flow in the atmosphere that produces gusts and eddies.
Twilight The time immediately before sunrise and after sunset when the sky remain illuminated.
Turbulence Irregular, apparently random motions of a fluid such as air or water.
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turbulence—In meteorology, any irregular or disturbed flow in the atmosphere.
Icing Turbulence Metars Satellite
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TURBULENCE - Random swirling of the air felt as gusts and bumps in flight.
TWIST - See WASHOUT
TWO-AXIS CONTROL - A control system consisting of only rudder and elevator or weight-shift and rudder.
Turbulence - The vertical motion of the air, at times violent, which can cause the up-and-down movement of a plane, etc.
TURBULENCE - Aviation term for flight affected from flying through turbulent air. Often causes the aircraft to shake, but in extreme cases can upset (through out of control) and / or damage the aircraft.
CLEAR AIR TURBULENCE
Name given to turbulence that may occur in perfectly clear air without any visual in warning in the form of clouds.
Moderate Turbulence
Turbulence that is similar to Light Turbulence but of greater intensity. Changes in altitude and/or attitude occur but the aircraft remains in positive control at all times.
Clear air turbulence (CAT) Turbulence encountered by aircraft flying through cloudless skies. Thermals, wind shear, and jet streams can each be a factor in producing CAT.
The region of turbulence immediately to the rear of a solid body caused by the flow of air over or around the body.
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When observed at high levels (i.e., in cirrus formations), they may indicate severe or extreme turbulence.
Clear Air Turbulence(CAT) - In aviation, sudden severe turbulence occurring in cloudless regions that causes violent buffeting of aircraft.Clear IceA thin coating of ice on terrestrial objects, caused by rain that freezes on impact.
Clear-air turbulence Turbulence encountered by aircraft when flying through air space devoid of clouds. Thermals and wind shear are the main causes. Clinometer An instrument for measuring angles of inclination.
At above 2 km altitude, the wind appears to be undisturbed by the surface, and turbulence is slight. Empirical formulas have been given for the variation of velocity with height, such as v = khα with α = 1/5 or 1/4.
Warnings of flight hazards, such as turbulence, icing, low clouds and reduced visibility remain most critical for the protection of life and property over the United States from the earth's surface up to 24,000 feet.
These properties are interconnected by the various physical processes such as precipitation, evaporation, infrared radiation, convection, advection, and turbulence.
Troposphere-The lowest layer of the atmosphere marked by considerable turbulence and a decrease in temperature with height. This layer stretches from the surface to approximately 10km. Weather on earth is created here.
Trough: on a weather chart, a narrow, elongated area of relatively low pressure.Turbulence: irregular motion of the atmosphere, as indicated by gusts and lulls in the wind.
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Unstable air: see absolutely unstable air.
Microscale - a study of small gusts, eddies and things that last less than an hour, usually. Turbulence, diffusion, and wind shear are examples.
Millibar - an atmospheric pressure of 100 Pascals (Newtons per square metre).
Stable air mass Air mass having static stability in its lower layers; it is free from convection, has a low degree of turbulence and may have stratiform clouds or fog, or no clouds.
Eye wall: The ring of thunderstorms that surrounds a storm's eye. The heaviest rain, strongest winds and worst turbulence are normally in the eye wall. ...
Microscale - A small-sized event that is usually measured in meters and seconds to minutes; a cloud-sized phenomenon; e.g. turbulence, and dust devils.
ROTOR CLOUD An altocumulus cloud formation that can be found in the lee of a mountain or similar barrier. The air rotates around a horizontal axis, creating turbulence. Altocumulus lenticularis is an example.
Occurs when air moves from land to sea, and is usually associated with dry weather.
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Browse Related Terms: Clear Air Turbulence, Hygroscopic, Onshore Flow, outflow, Wake ...
Actually this term has nothing to do with pet cats. It is used by British meteorologists to designate a warning to pilots about Clear Air Turbulence, which is usually a cloud-free wind shear zone aloft that can make for a bumpy plane ride.
humidity that, upon lifting, the air parcel reaches saturation. Individual billow clouds generally have life times of a few minutes. The presence of billow clouds provides a visible signal to aviation interests of potentially dangerous turbulence.
The warm tropical air is forced to rise and become unstable with the development of large cumuliform clouds. Severe weather such as thunderstorms, squall lines and severe turbulence may accompany these cold fronts.
TurbulenceA warning issued when sustained winds of 39 to 73 miles per hour (34 to 63 knots) are expected within 24 hours.TwisterA colloquial term for a tornado.TyphoonA hurricane that forms in the Western Pacific Ocean.
 See also: Surface, Air, Temperature, Layer, Horizon
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