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foehn phase
One of three stages to describe the development of the foehn in the Alps: the preliminary phase, when cold air at the surface is separated from warm dry air aloft by a subsidence inversion; the anticyclonic phase, when the warm air reaches a station as the result of the cold air flowing out from the plain; and the stationary phase or cyclonic phase, when the foehn wall forms and the downslope wind becomes appreciable.
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From McGraw-Hill Dictionary of Environmental Science.  The Content is a copyrighted work of McGraw-Hill and McGraw-Hill reserves all rights in and to the Content.  The Work is © 2008 by The McGraw-Hill Companies, Inc.
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