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ATMOSPHERIC MIXED LAYER [1 record]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2004-01-28

English

Subject field(s)
  • Atmospheric Physics
DEF

Layer adjacent to the Earth's surface which is mixed by convection or frictionally-induced turbulence or both.

CONT

Mixing depth. The thickness of the atmospheric layer near the surface in which air pollutants are dispersed by turbulence. At the top of the mixing layer a barrier to the dispersion is often formed by a temperature inversion.

OBS

mixed layer ... sometimes called convective mixed layer, convective boundary layer, or mixing layer in air-pollution meteorology. ... The terms mixed layer, convective mixed layer, and convective boundary layer commonly imply only the buoyantly stirred layer.

Key term(s)
  • atmospheric mixed layer

French

Domaine(s)
  • Physique de l'atmosphère
DEF

Couche adjacente à la surface terrestre, mélangée par la convection ou par la turbulence due au frottement ou par leur effet combiné.

CONT

[Ce modèle] se caractérise en particulier par la prise en compte non plus d'un certain nombre de couches arbitrairement désignées, mais par la caractérisation de trois couches ayant une existence physique : une couche de surface, comprise entre le sol et la couche de mélange et dans laquelle existent des phénomènes tels que dépôt sec, qui affectent le profil vertical des polluants - une couche de mélange s'étendant jusqu'à la couche d'inversion - une couche d'inversion au-dessus de la couche de mélange.

OBS

Il existe aussi une notion semblable à celle de la couche de mélange en hydrologie.

Spanish

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

Capa próxima a la superficie de la Tierra que está mezclada por convección y/o por turbulencia inducida por el rozamiento.

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