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autan wind [1 record]

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Record 1 2005-06-07

English

Subject field(s)
  • Atmospheric Physics
DEF

A strong southeast wind in south-central France, especially in Gascony and the upper Garonne River.

CONT

The AUTAN blows in the south of France between the Massif Central and the Pyrenees; to be more precise: between the Montagne Noir and the Corbières. It progresses northwest towards Toulouse and beyond, following the valley of the river Garonne. Very strong and turbulent at times.

CONT

During the whole period, the area of Toulouse was subject to the classical "Autan" wind, reaching a force of about 15 m/s. This wind occurs usually in connection with synoptic flow from the south-west. It is limited to a shallow layer below a strong inversion.

OBS

There are two types. 1) The autan blanc brings fine dry weather, cold in winter, hot in summer, as a result of the downslope motion imposed by the Pyrenees and southern Cevennes. ... 2) The autan noir is less frequent and rarely lasts for more than two days; it is more humid and cloudy, bringing fog, rain, or snow over high ground near the sea.

French

Domaine(s)
  • Physique de l'atmosphère
DEF

Vent régional du sud-est assez violent et irrégulier soufflant par rafales en France sur le Quercy et le Rouergue ainsi que dans la moyenne vallée de la Garonne.

CONT

En fonction de la situation synoptique de l'atmosphère et de la nature des masses d'air intéressées, on distingue deux types de vent d'autan : -l'autan blanc [...]; -l'autan noir [...]

CONT

Le vent d'autan [...] est un vent violent et turbulent, du fait des accélérations qu'il subit en s'engouffrant dans des vallées resserrées [...]

CONT

Quant à l'Autan, [...] son nom provient du latin altanus : vent de la haute mer. [...] Les autans en langage poétique désignent des vents impétueux.

Spanish

Campo(s) temático(s)
  • Física de la atmósfera
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