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ground layer

surface boundary layer

noun, Meteorology
1.
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.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for ground-layer

ground layer

noun
1.
See layer (sense 2)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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