Hoarfrost: Difference between revisions

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|Meaning=A deposit of interlocking [[ice crystals]] ([[hoar crystals]]) formed by direct [[deposition]] on  objects, usually those of small diameter freely exposed to the air, such as tree branches, plant stems  and leaf edges, wires, poles, etc.
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|Explanation=Also, [[frost]] may form on the skin of an aircraft when a cold aircraft flies into air that is warm  and moist or when it passes through air that is supersaturated with [[water vapor]]. The deposition  of hoarfrost is similar to the process by which [[dew]] is formed, except that the [[temperature]] of the  befrosted object must be below [[freezing]]. It forms when air with a [[dewpoint]] below freezing is  brought to [[saturation]] by cooling. In addition to its formation on freely exposed objects ([[air hoar]]),  hoarfrost also forms inside unheated buildings and vehicles, in caves, in crevasses ([[crevasse hoar]]),  on [[snow]] surfaces ([[surface hoar]]), and in air spaces within snow, especially below a [[snow crust]]  ([[depth hoar]]). Hoarfrost is more fluffy and feathery than [[rime]], which in turn is lighter than [[glaze]].  Observationally, hoarfrost is designated light or heavy (frost) depending upon the amount and  uniformity of deposition.
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== hoarfrost ==
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<div class="definition"><div class="short_definition">A deposit of interlocking [[ice crystals]] ([[hoar crystals]]) formed by direct [[deposition]] on  objects, usually those of small diameter freely exposed to the air, such as tree branches, plant stems  and leaf edges, wires, poles, etc.</div><br/> <div class="paragraph">Also, [[frost]] may form on the skin of an aircraft when a cold aircraft flies into air that is warm  and moist or when it passes through air that is supersaturated with [[water vapor]]. The deposition  of hoarfrost is similar to the process by which [[dew]] is formed, except that the [[temperature]] of the  befrosted object must be below [[freezing]]. It forms when air with a [[dewpoint]] below freezing is  brought to [[saturation]] by cooling. In addition to its formation on freely exposed objects ([[air hoar]]),  hoarfrost also forms inside unheated buildings and vehicles, in caves, in crevasses ([[crevasse hoar]]),  on [[snow]] surfaces ([[surface hoar]]), and in air spaces within snow, especially below a [[snow crust]]  ([[depth hoar]]). Hoarfrost is more fluffy and feathery than [[rime]], which in turn is lighter than [[glaze]].  Observationally, hoarfrost is designated light or heavy (frost) depending upon the amount and  uniformity of deposition.</div><br/> </div>
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Latest revision as of 03:42, 31 March 2024

A deposit of interlocking ice crystals (hoar crystals) formed by direct deposition on objects, usually those of small diameter freely exposed to the air, such as tree branches, plant stems and leaf edges, wires, poles, etc.

Also, frost may form on the skin of an aircraft when a cold aircraft flies into air that is warm and moist or when it passes through air that is supersaturated with water vapor. The deposition of hoarfrost is similar to the process by which dew is formed, except that the temperature of the befrosted object must be below freezing. It forms when air with a dewpoint below freezing is brought to saturation by cooling. In addition to its formation on freely exposed objects (air hoar), hoarfrost also forms inside unheated buildings and vehicles, in caves, in crevasses (crevasse hoar), on snow surfaces (surface hoar), and in air spaces within snow, especially below a snow crust (depth hoar). Hoarfrost is more fluffy and feathery than rime, which in turn is lighter than glaze. Observationally, hoarfrost is designated light or heavy (frost) depending upon the amount and uniformity of deposition.

A deposit of interlocking ice crystals (hoar crystals) formed by direct deposition on objects, usually those of small diameter freely exposed to the air, such as tree branches, plant stems and leaf edges, wires, poles, etc.

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