katabatic wind

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A gravity-driven atmospheric current, which is forced by cooling air adjacent to a sloped surface (Gallée et al. (1996) J. Appl. Met. 35, 7). Descending, adiabatically warmed katabatic winds are föhn winds. Cold katabatic winds result from the slumping down of very cold, and hence dry, air. Coastal Antarctica is dominated by katabatic gales; the gentler katabatic flows of hill slopes produce frost hollows.

Subjects: Earth Sciences and Geography.

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