Wind action is confined to areas where there is little or no soil and
so it mainly operates in desert areas or at beaches. Along with rivers
and ice, wind has the ability to erode, transport and deposit material.
It can do this only in a very limited way, however, if the surface is
protected by vegetation or held together by damp soil. Vegetation and
moisture combine to hold the soil in position so this means that wind as
an agent of erosion or deposition is only significant in arid regions
or along sandy coastal areas in other regions. In these areas the loose
surface material which is, for the most part, unprotected by vegetation
can be significantly altered by the action of wind. A basic appreciation
of how deserts occur and where they are found is helpful in
understanding the work of wind.
The majority of deserts are found in the subtropical high-pressure
regions 15° and 30° north and south of the equator - the Sahara would be
typical of this type of desert. Another typical area of desert would be
at coastal areas where there is cold ocean current, usually on the
western side of land masses, e.g., the Atacama Desert in South America.