TERMIUM Plus®

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EKMAN LAYER [2 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2003-08-01

English

Subject field(s)
  • Oceanography
DEF

The thin horizontal layer of water riding on top of the ocean that is affected by wind.

CONT

The stress of wind blowing across the sea causes a surface layer of water to move. Due to the low viscosity of water, this stress is not directly communicated to the ocean interior, but is balanced by the Coriolis force within a relatively thin surface layer, 10-200m thick. This layer is called the Ekman layer and the motion of this layer is called the Ekman transport.

CONT

The depth of the Ekman layer is on the order of a kilometer in the air and 100m in the ocean.

French

Domaine(s)
  • Océanographie
DEF

Épaisseur d'eau comprise entre la surface et la profondeur à laquelle le courant de dérive ne se fait plus sentir.

CONT

La partie supérieure de la CLA [(couche limite atmosphérique)] est appelée la couche d'Ekman. Dans cette région, la structure du vent est influencée à la fois par le frottement de l'air sur la surface terrestre, par la stratification thermique de l'air et par la force de Coriolis.

CONT

La profondeur de la couche [d'eau] entraînée par le vent ou couche d'Ekman, peut atteindre quelques dizaines de mètres.

Spanish

Campo(s) temático(s)
  • Oceanografía
Save record 1

Record 2 2003-08-01

English

Subject field(s)
  • Astrophysics and Cosmography
  • Meteorology
  • Air Pollution
DEF

The layer of transition between the surface boundary layer (where the shearing stress is constant) and the free atmosphere (where the atmosphere is treated as an ideal fluid in approximate geostrophic equilibrium).

CONT

The depth of the Ekman layer is on the order of a kilometer in the air and 100m in the ocean.

OBS

In Ekman's analysis, the coefficient of eddy viscosity is assumed constant within this layer; subsequent calculations have relaxed this assumption.

OBS

Ekman layer. ... Together with the surface boundary layer, it makes up the planetary boundary layer.

French

Domaine(s)
  • Astrophysique et cosmographie
  • Météorologie
  • Pollution de l'air
DEF

Partie de la troposphère située entre l'atmosphère libre et la couche limite de surface.

OBS

Cette couche s'étend entre cent et huit cents mètres d'altitude.

OBS

Dans l'analyse d'Ekman, le coefficient de viscosité du tourbillon est supposé constant à l'intérieur de cette couche; des calculs ultérieurs ont tempéré cette hypothèse.

Spanish

Campo(s) temático(s)
  • Astrofísica y cosmografía
  • Meteorología
  • Contaminación del aire
DEF

Capa de transmisión entre la capa límite superficial (en donde la tensión cortante es constante) y la atmósfera libre (en donde la atmósfera se trata como un fluido ideal en equilibrio geostrófico aproximado).

OBS

En el análisis de Ekman, el coeficiente de viscosidad de la turbulencia se supone constante en el interior de esta capa; ulteriores cálculos han relajado esa hipótesis.

Save record 2

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TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
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