TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

Forecast of winds and temperatures for designated levels, over a designated point, at a specific time, recommended for use by aviation for a stated period.  3, record 1, English, - upper%20level%20wind%20and%20temperature%20forecast

Record number: 1, Textual support number: 1 CONT

Upper level wind and temperature forecasts(FD) are upper level forecasts of wind velocity, expressed in knots(kt) and to the nearest 10º true, and temperature, expressed in degrees Celsius(ºC). Temperatures are not forecast for 3 000 ft [feet] ;in addition, this level is omitted if the terrain elevation is greater than 1 500 ft. All forecast temperatures for altitudes over 24 000 ft are negative.  4, record 1, English, - upper%20level%20wind%20and%20temperature%20forecast

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 DEF

Prévision des vents et des températures pour des niveaux déterminés, au-dessus d'un point déterminé à un moment précis et dont on recommande l'emploi en aéronautique pour une période définie.  3, record 1, French, - pr%C3%A9vision%20des%20vents%20et%20des%20temp%C3%A9ratures%20en%20altitude

Record number: 1, Textual support number: 1 CONT

Les prévisions des vents et des températures en altitude (FD) sont des prévisions de vitesse du vent en nœuds (kt) et arrondie à la dizaine de degrés vrais la plus proche, et de température en degrés Celsius (ºC). Les températures ne sont pas prévues pour le niveau des 3 000 pi [pieds], qui d'ailleurs est omise quand l'élévation du terrain est supérieure à 1 500 pi. Toutes les températures prévues pour des altitudes supérieures à 24 000 pi sont négatives.  4, record 1, French, - pr%C3%A9vision%20des%20vents%20et%20des%20temp%C3%A9ratures%20en%20altitude

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 CONT

Mid-level wind. The middle and upper level winds in the mid-latitudes will generally have a westerly component to them.  1, record 2, English, - mid%2Dlevel%20wind

Record 2,  Textual support,  French

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 CONT

What is the big deal about having a negative tilt?(1) indicates a low pressure has reached maturity,(2) indicates strong differential advection(middle and upper level cool air advecting over low level warm air advection). This increases thermodynamic instability.(3) Indicates good vertical wind shear.  1, record 3, English, - thermodynamic%20instability

Record 3,  Textual support,  French

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 CONT

What is the big deal about having a negative tilt?(1) indicates a low pressure has reached maturity,(2) indicates strong differential advection(middle and upper level cool air advecting over low level warm air advection). This increases thermodynamic instability.(3) Indicates good vertical wind shear.  1, record 4, English, - negative%20tilt

Record 4,  Textual support,  French

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 CONT

What is the big deal about having a negative tilt?(1) indicates a low pressure has reached maturity,(2) indicates strong differential advection(middle and upper level cool air advecting over low level warm air advection). This increases thermodynamic instability.(3) Indicates good vertical wind shear.  1, record 5, English, - low%20level%20warm%20air%20advection

Record 5,  Textual support,  French

Record 5,  Textual support,  Spanish

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 DEF

A wind in the atmospheric layers not adjacent to the Earth’s surface.  6, record 6, English, - upper%2Dlevel%20wind

Record 6,  Textual support,  French

Record number: 6, Textual support number: 1 DEF

vents de la haute atmosphère; vents en altitude : Vents de divers niveaux de la haute atmosphère; vents des couches atmosphériques non contiguës à la surface terrestre.  2, record 6, French, - vent%20en%20altitude

Record number: 6, Textual support number: 1 OBS

vent en altitude : terme uniformisé par le Comité d'uniformisation de la terminologie aéronautique (CUTA) - Opérations aériennes.  4, record 6, French, - vent%20en%20altitude

Record 6,  Textual support,  Spanish

Record 7,  Textual support,  English

Record number: 7, Textual support number: 1 DEF

The wind speed and direction at various levels in the atmosphere, above the domain of surface weather.  2, record 7, English, - wind%20aloft

Record 7,  Textual support,  French

Record number: 7, Textual support number: 1 DEF

Vitesse et direction du vent à divers niveaux de l'atmosphère, à des hauteurs dépassant le domaine de la météorologie en surface.  1, record 7, French, - vent%20en%20altitude

Record 7,  Textual support,  Spanish

Record number: 7, Textual support number: 1 DEF

Velocidad y dirección del viento en diversos niveles de la atmósfera, en alturas más elevadas que las correspondientes a la meteorología de superficie.  1, record 7, Spanish, - viento%20en%20altitud

Record 8,  Textual support,  English

Record number: 8, Textual support number: 1 DEF

That part of the atmosphere above the friction layer, in which the air motion is affected negligibly by surface friction.  3, record 8, English, - free%20atmosphere

Record number: 8, Textual support number: 1 CONT

Free atmosphere [is] in meteorology, the part of the troposphere above the planetary boundary layer. It is free of the influence of the earth’s surface and, on the average, slightly stable.  4, record 8, English, - free%20atmosphere

Record number: 8, Textual support number: 2 CONT

The base of the free atmosphere is usually taken as the geostrophic wind level. In practice it is observed that the geostrophic wind level is often between 1 and 2 km, and it is assumed that this marks the upper limit of frictional influence of the earth's surface. The geostrophic wind level may be considered to be the top of the Ekman layer and planetary boundary layer, that is, the base of the free atmosphere.  5, record 8, English, - free%20atmosphere

Record number: 8, Textual support number: 1 OBS

free atmosphere: Here, winds are not directly retarded by surface friction. Clouds occur most frequently in this portion of the troposphere (the exceptions are fog and clouds that impinge on or develop over elevated terrain).  6, record 8, English, - free%20atmosphere

Record number: 8, Textual support number: 2 OBS

free atmosphere: Sometimes called free air.  5, record 8, English, - free%20atmosphere

Record 8,  Textual support,  French

Record number: 8, Textual support number: 1 DEF

Partie supérieure de la troposphère, située entre la couche d'Ekman et la tropopause, dans laquelle le mouvement de l'air n'est presque pas touché par le frottement de surface.  3, record 8, French, - atmosph%C3%A8re%20libre

Record number: 8, Textual support number: 1 CONT

Les forces de frottement [...] traduisent la friction turbulente de l'air sur le sol. Leur action se fait ressentir très près du sol dans une zone appelée la couche limite atmosphérique (CLA). On divise ainsi schématiquement les basses couches de l'atmosphère en deux parties distinctes avec près du sol la CLA et loin de l'influence du sol, à plusieurs centaines de mètres d'altitude, l'atmosphère libre.  4, record 8, French, - atmosph%C3%A8re%20libre

Record number: 8, Textual support number: 2 CONT

La troposphère. [...] Divisée en 2 couches, la première jusqu'à à peu près 3000m subit les facteurs géographiques. (Fortes turbulences, températures irrégulières, concentration de toutes les impuretés). La deuxième couche est l'atmosphère libre qui s'étend jusqu'à la tropopause.  5, record 8, French, - atmosph%C3%A8re%20libre

Record number: 8, Textual support number: 1 OBS

[La] couche de frottement [...] s'étend du sol jusqu'à une hauteur essentiellement variable en fonction des aspérités du sol mais que l'on peut estimer entre 600-1000m.  6, record 8, French, - atmosph%C3%A8re%20libre

Record number: 8, Textual support number: 2 OBS

couche d'Ekman: Cette couche s'étend entre huit cents mètres et une dizaine de kilomètres d'altitude.  3, record 8, French, - atmosph%C3%A8re%20libre

Record 8,  Textual support,  Spanish

Record number: 8, Textual support number: 1 DEF

Parte de la atmósfera, por encima de la capa de rozamiento, en la que la influencia del rozamiento en la superficie sobre el movimiento del aire es despreciable.  2, record 8, Spanish, - atm%C3%B3sfera%20libre

Record 9,  Textual support,  English

Record number: 9, Textual support number: 1 DEF

Progressive drawing apart of the streamlines in the direction of flow.  3, record 9, English, - diffluence

Record number: 9, Textual support number: 1 OBS

Difluence in an upper level wind field is considered a favorable condition for severe thunderstorm development(if other parameters are also favorable). But difluence is not the same as divergence. In a difluent flow, winds normally decelerate as they move through the region of difluence, resulting in speed convergence which offsets the apparent diverging effect of the difluent flow.  2, record 9, English, - diffluence

Record 9,  Textual support,  French

Record number: 9, Textual support number: 1 DEF

Épanouissement progressif, dans le sens de l'écoulement, des lignes de courant.  2, record 9, French, - diffluence

Record 9,  Textual support,  Spanish

Record number: 9, Textual support number: 1 DEF

Separación progresiva de las líneas de corriente en la dirección del flujo.  1, record 9, Spanish, - difluencia