Friction layer

friction layer"An alternative, somewhat inappropriate, name for the atmospheric boundary layer. In the real atmosphere, turbulent drag, rather than molecular friction, is responsible for reducing wind speeds in the boundary layer.

Friction Layer - same as planetary boundary layer
Front - the boundary or transition zone between two dissimilar air masses ...

FRICTION LAYER
The thin layer of atmosphere adjacent to the earth's surface. Surface friction is effective in slowing down wind up to approximately 1,500 to 3,000 feet above the ground. Above this level, air tends to flow parallel to the isobars.

FRICTION LAYER- This is another term for the boundary layer. This is the layer of the troposphere closest to the earth's surface where friction is a significant force and wind tends to be gusty (irregular flow).

Friction layer The zone of the atmosphere between the Earth's surface and an altitude of about 1,000 m (3,280 ft), where most frictional resistance is confined.

Friction Layer
Same as Planetary Boundary Layer; the layer within the atmosphere between the earth's surface and 1 km above the surface; this is the layer where friction affects wind speed and wind direction.
FRMG ...

In the friction layer, the turbulent friction that the Earth exerts on the air slows the wind down. This slowing causes the wind to be not geostrophic.

the friction layer, or boundary layer of the atmosphere). In the free atmosphere, geostrophic wind relationships should be used. Log wind profiles are generated and used in a good many atmospheric pollution dispersion models.

NOAA National Weather Service - Cite This Source - This Definition
Browse Related Terms: Friction Layer, Meteogram, Planetary Boundary Layer, Variable Wind Direction
Variable Wind Direction - permalink - collapse
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Geostrophic wind Theoretical wind which results from the equilibrium between horizontal components of the pressure gradient force and the Coriolis force (deviating force) above the friction layer.

Sometimes this is called a FRICTION LAYER or GEOTROPH. This layer often causes winds to decrease especially at night in the lowest levels of the atmosphere, with the stronger winds only a slight distance above the layer.

of the earth's atmosphere, usually up to 3,300 feet, or one kilometer, from the earth's surface, where the wind is influenced by the friction of the earth's surface and the objects on it. Related terms: surface boundary layer and friction layer ...

Friction HeadIn hydrologic terms, the decrease in total head caused by frictionFriction LayerSame as Planetary Boundary Layer; the layer within the atmosphere between the earth's surface and 1 km above the surface; ...

See also: Layer, Friction, Wind, Surface, Horizon