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VENT MOYEN [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2015-10-19

English

Subject field(s)
  • Atmospheric Physics
  • Aircraft Piloting and Navigation
DEF

The wind direction and speed as determined from a sample reading taken every second over a two-minute period.

OBS

mean wind : term and definition standardized by the Glossary for Pilots and Air Traffic Services Personnel Committee.

Key term(s)
  • 2-min mean wind

French

Domaine(s)
  • Physique de l'atmosphère
  • Pilotage et navigation aérienne
DEF

Direction et vitesse du vent obtenues en faisant la moyenne de lectures prises toutes les secondes sur une période de deux minutes.

OBS

vent moyen : terme et définition normalisés par le Comité sur le Glossaire à l'intention des pilotes et du personnel des services de la circulation aérienne.

Spanish

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Record 2 2001-04-25

English

Subject field(s)
  • Atmospheric Physics
CONT

The prevailing winds in Sydney area are a combination of synoptic (pressure driven) flows and meso-scale (local) flows. The synoptic conditions are dominated by high pressure systems, moving air in a clockwise direction across Australia, from west to east, with an average period of six to seven days. In summer these high pressure systems are located to the south of Sydney, resulting in onshore synoptic winds. In winter these synoptic pressure systems shift north, following the movement of the sun to the northern hemisphere, resulting in westerly synoptic winds. The winter westerly winds have the greatest number of days when wind speeds exceed 40kph (Linacre, 1997).

French

Domaine(s)
  • Physique de l'atmosphère
CONT

Le vent synoptique. C'est le vent principal; quand ça souffle fort, c'est généralement lui. Le vent synoptique utilise le principe numéro 1 [l'air a tendance à se déplacer depuis les zones de hautes pressions (anticyclones) vers les zones de basses pressions]. Donc, quand la pression atmosphérique monte ou descend en un point, les masses d'air se déplacent. [...] De forte différences de pression entre un point et un autre entraînent des vents violents, car la nature tente de combler la dépression en piquant de l'air dans une zone anticyclonique.

OBS

Le vent moyen : vent mesuré et moyenné pendant un intervalle de temps déterminé. Il est aussi appelé vent synoptique. Il s'agit du vent transmis dans les messages (moyenné sur dix minutes). Il est le plus représentatif des mouvements de l'air.

Spanish

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