Cold Air Drainage in a Narrow Forested Valley
Authors: Miller, David R.; Bergen, James D.; Neuroth, G.
Source: Forest Science, Volume 29, Number 2, 1 June 1983 , pp. 357-370(14)
Publisher: Society of American Foresters
Abstract:Nocturnal downhill cold air drainage was monitored in a narrow, forested (ponderosa pine) valley in eastern Arizona. Vertical, horizontal, and temporal variations in air temperatures, canopy temperatures, surface vector winds, sky radiation, and inversion heights were determined across a section of the valley. Drainage winds in the forest were <2 m s-1, and a capping inversion formed above the canopy but below the valley rim. Net radiation ranged from -48 to 4 W m-2 air temperatures (below canopy) dropped from 2.2 to -4.9°C during the night, while canopy surface temperatures ranged from 9.5 to -2.0°C. Interactions of down-slope flows, valley flows, and canopy influences as the cold air drainage processes intensified throughout the night are described. Forest Sci. 29:357-370.
Keywords: Katabatic flow
Document Type: Journal Article
Affiliations: Bureau of Air Quality Control, Arizona Public Health Service, Phoenix, Arizona
Publication date: June 1, 1983
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