friction-layer

friction layer

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surface boundary layer

noun Meteorology.
the thin layer of air adjacent to the earth's surface, usually considered to be less than 300 feet (91 meters) high.
Also called surface layer, atmospheric boundary layer, friction layer, ground layer.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
friction layer
 
n
the atmospheric layer extending up to about 600 m, in which the aerodynamic effects of surface friction are appreciable

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