The force of winds

The wind exerts the same kind of force on particles on the land surface that river currents exert on it's bed. Turbuence and forward motion combine to lift particles into the windstream. Particles are also lifted into the air by means of saltation.

The force a wind can exert on a surface not only depends upon the wind speed, but also upon the roughness of the surface over which the wind blows. The greater the roughness of the surface, the greater the turbulence induced in the wind as it blows over the surface. As turbulence increases, the ability of the wind to lift particles from and erode a surface also increases.


This is a view of the Earth.
Click on image for full size version (40K GIF)
Image from: NOAA

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The force of winds

The wind exerts the same kind of force on particles on the land surface that river currents exert on it's bed. Turbuence and forward motion combine to lift particles into the windstream. Particles are also lifted into the air by means of saltation.

The force a wind can exert on a surface not only depends upon the wind speed, but also upon the roughness of the surface over which the wind blows. The greater the roughness of the surface, the greater the turbulence induced in the wind as it blows over the surface. As turbulence increases, the ability of the wind to lift particles from and erode a surface also increases.


This is a view of the Earth.
Click on image for full size version (40K GIF)
Image from: NOAA

Go to a listing of Rocks


The force of winds

The wind exerts the same kind of force on particles on the land surface that river currents exert on it's bed. Turbuence and forward motion combine to lift particles into the windstream. Particles are also lifted into the air by means of saltation.

The force a wind can exert on a surface not only depends upon the wind speed, but also upon the roughness of the surface over which the wind blows. The greater the roughness of the surface, the greater the turbulence induced in the wind as it blows over the surface. As turbulence increases, the ability of the wind to lift particles from and erode a surface also increases.


This is a view of the Earth.
Click on image for full size version (40K GIF)
Image from: NOAA

Go to a listing of Rocks



Last modified November 15, 1997 by the Windows Team

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