Studies of the Army Aviation (V/STOL) Environment. Report No. 5. Occurrence of Ice in the Form of Glaze, Rime, and Hoarfrost with Respect to the Operation and Storage of V/STOL Aircraft
ARMY ENGINEER TOPOGRAPHIC LABS FORT BELVOIR VA
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As part of a series entitled Studies of the Army Aviation VSTOL Environment, the report describes the nature and worldwide occurrence of ice in the form of glaze, rime, and hoarfrost from the surface to 20,000 feet in accordance with contract requirements. Because of the nature of available sources and scarcity of data for these phenomena in most parts of the world, this study is more descriptive than quantitative. It was found that glaze, rime, and hoarfrost form within a very specific and rather narrow range of meteorological conditions where air and affected surface temperatures are slightly above, at, or below 0C 32F and moisture, usually supercooled, is present. Icing may thus be produced at ground level by glaze storms, fog, humid air, or thaw-freeze action, and in the atmosphere by clouds or moist air. Geographic distribution of these icing phenomena is dependent on a variety of physical factors.
- Snow, Ice and Permafrost