hoarfrost


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hoarfrost:

see frostfrost
or hoarfrost,
ice formed by the condensation of atmospheric water vapor on a surface when the temperature of the surface is below 32°F; (0°C;). In the formation of frost, a gas (water vapor) is changed directly to a solid (see dew).
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Hoarfrost

 

ice crystals that form on surfaces on cold, clear, still nights. The particles of hoarfrost are similar in shape to snowflakes but are less regular. Like dew, hoarfrost forms because of the cooling of the surface of the earth as a result of thermal radiation, which causes a drop in the temperature of the adjacent layers of air and the sublimation of the water vapor on the surface, which is cooled below 0°C.

hoarfrost

[′hȯr‚frȯst]
(hydrology)
A deposit of interlocking ice crystals formed by direct sublimation on objects. Also known as white frost.

hoarfrost

a deposit of needle-like ice crystals formed on the ground by direct condensation at temperatures below freezing point
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While hoarfrost is attractive outside in nature, it is known as rime in refrigeration devices and is unwanted as it decreases the performance of the unit," explains Hirayama.
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Instead, we have had a hoarfrost covering the trees and ground with a glistening white coating.
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It was during the same winter that I remember finding the windowpanes of the rectory doors covered with hoarfrost, and being fascinated by the needles and crystalline forms in this, and how I could melt some of the frost with my breath and make a little peephole.
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Here, I saw circles of hoarfrost and leaves tinged with their own temporary tinsel.
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For a moment he feels a freezing chill on his lips as if the needles of mentholated hoarfrost settled on his tongue, lips, and palate.
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The beauty of winter's landscape is in the small things: the hoarfrost on bare twigs and dried grasses, trickles of snowmelt under lacelike ice, the inscrutable patterns of lichens on exposed rock surfaces.
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