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The Government of Canada’s terminology and linguistic data bank.
FREE AIR [2 records]
Record 1 - internal organization data 2004-11-08
Record 1, English
Record 1, Subject field(s)
- Atmospheric Physics
- Physical Geography (General)
- The Earth (Astronomy)
Record 1, Main entry term, English
- free atmosphere
1, record 1, English, free%20atmosphere
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
- free air 2, record 1, English, free%20air
correct, see observation
Record 1, Textual support, English
Record number: 1, 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 1, English, - free%20atmosphere
Record number: 1, 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 1, English, - free%20atmosphere
Record number: 1, 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 1, English, - free%20atmosphere
Record number: 1, 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 1, English, - free%20atmosphere
Record number: 1, Textual support number: 2 OBS
free atmosphere: Sometimes called free air. 5, record 1, English, - free%20atmosphere
Record 1, French
Record 1, Domaine(s)
- Physique de l'atmosphère
- Géographie physique (Généralités)
- Terre (Astronomie)
Record 1, Main entry term, French
- atmosphère libre
1, record 1, French, atmosph%C3%A8re%20libre
correct, feminine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
- air libre 2, record 1, French, air%20libre
correct, masculine noun
Record 1, Textual support, French
Record number: 1, 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 1, French, - atmosph%C3%A8re%20libre
Record number: 1, 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 1, French, - atmosph%C3%A8re%20libre
Record number: 1, 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 1, French, - atmosph%C3%A8re%20libre
Record number: 1, 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 1, French, - atmosph%C3%A8re%20libre
Record number: 1, 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 1, French, - atmosph%C3%A8re%20libre
Record 1, Spanish
Record 1, Campo(s) temático(s)
- Física de la atmósfera
- Geografía física (Generalidades)
- Tierra (Astronomía)
Record 1, Main entry term, Spanish
- atmósfera libre
1, record 1, Spanish, atm%C3%B3sfera%20libre
correct, feminine noun
Record 1, Abbreviations, Spanish
Record 1, Synonyms, Spanish
Record 1, Textual support, Spanish
Record number: 1, 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 1, Spanish, - atm%C3%B3sfera%20libre
Record 2 - internal organization data 1985-12-16
Record 2, English
Record 2, Subject field(s)
- Mechanical Components
Record 2, Main entry term, English
- free air 1, record 2, English, free%20air
Record 2, Abbreviations, English
Record 2, Synonyms, English
Record 2, Textual support, English
Record number: 2, Textual support number: 1 OBS
Record 2, French
Record 2, Domaine(s)
- Composants mécaniques
Record 2, Main entry term, French
- air libre 1, record 2, French, air%20libre
Record 2, Abbreviations, French
Record 2, Synonyms, French
Record 2, Textual support, French
Record number: 2, Textual support number: 1 OBS
hydraulique, pneumatique 127cp/2.75 1, record 2, French, - air%20libre
Record 2, Spanish
Record 2, Textual support, Spanish
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