frost

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frost

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 dewdew,
thin film of water that has condensed on the surface of objects near the ground. Dew forms when radiational cooling of these objects during the nighttime hours also cools the shallow layer of overlying air in contact with them, causing the condensation of some water vapor.
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). Frost often appears as a light feathery deposit of ice, often of a curious and delicate pattern. The dates on which killing frosts (frost destructive to vegetation and staple agricultural products) occur vary considerably. Maps showing the growing seasongrowing season,
period during which plant growth takes place. In temperate climates the growing season is limited by seasonal changes in temperature and is defined as the period between the last killing frost of spring and the first killing frost of autumn, at which time annual
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 and the probable date of occurrence of frost may be obtained from the U.S. National Weather Service. The Weather Service stations issue warnings when frost is likely to occur; such warnings are broadcast by radio and are telegraphed or telephoned to farmers and fruitgrowers, who may protect their crops accordingly. Methods of protection vary: small flower beds and vegetable gardens are commonly protected by a screen or cloth that prevents excessive radiation from the earth and from the plants; in orchards, especially in California and Florida, simple oil-burning stoves or smudge pots placed at intervals throughout an orchard are used to heat and circulate the air sufficiently to prevent frost. Valleys are more subject to frosts than slopes, since cold air "slides" downhill and settles in depressions; orchards and citrus fruit groves are usually planted on slopes. Other factors in the occurrence of frost are altitude, latitude, proximity to large bodies of water, and other determinants of temperature. Frost, an element of climate, is an important agent of erosion. Frost heaving, an upthrust of ground caused by freezing, is a factor of consideration in engineering construction, especially in highway foundations. Frost is also a factor in the layer by layer mechanical weatheringweathering,
collective term for the processes by which rock at or near the earth's surface is disintegrated and decomposed by the action of atmospheric agents, water, and living things. Some of these processes are mechanical, e.g.
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 (exfoliation) of many types of rock masses. In England the word frost denotes freezing weather and degrees of frost means the number of degrees that the temperature falls below the freezing point.

Bibliography

See R. L. Berg and E. Wright Frost Action and Its Control (1984).

frost

[frȯst]
(hydrology)
A covering of ice in one of its several forms, produced by the sublimation of water vapor on objects colder than 32°F (0°C).

frost

The action (or result of such action) of the freezing of water vapor on a surface (e.g., the ground) that is colder than 32°F (0°C).

frost

Crystals of ice formed like dew but at a temperature below freezing.

frost

1. a white deposit of ice particles, esp one formed on objects out of doors at night
2. an atmospheric temperature of below freezing point, characterized by the production of this deposit
3. degrees below freezing point: eight degrees of frost indicates a temperature of either --8?C or 24?F

Frost

1. Sir David (Paradine). born 1939, British television presenter and executive, noted esp for political interviews
2. Robert (Lee). 1874--1963, US poet, noted for his lyrical verse on country life in New England. His books include A Boy's Will (1913), North of Boston (1914), and New Hampshire (1923)
References in classic literature ?
One cloudy moonlight night, in the third week of December (I think the twenty-second of the month) in the year 1757, I was walking on a retired part of the quay by the Seine for the refreshment of the frosty air, at an hour's distance from my place of residence in the Street of the School of Medicine, when a carriage came along behind me, driven very fast.
A frosty rime was on his head, and on his eyebrows, and his wiry chin.
The rest of the half-year is a jumble in my recollection of the daily strife and struggle of our lives; of the waning summer and the changing season; of the frosty mornings when we were rung out of bed, and the cold, cold smell of the dark nights when we were rung into bed again; of the evening schoolroom dimly lighted and indifferently warmed, and the morning schoolroom which was nothing but a great shivering-machine; of the alternation of boiled beef with roast beef, and boiled mutton with roast mutton; of clods of bread-and-butter, dog's-eared lesson-books, cracked slates, tear-blotted copy-books, canings, rulerings, hair-cuttings, rainy Sundays, suet-puddings, and a dirty atmosphere of ink, surrounding all.
I turned my eyes - a little dimmed by looking up at the frosty light - towards a great wooden beam in a low nook of the building near me on my right hand, and I saw a figure hanging there by the neck.
You might as well bet a man as he wouldn't catch the rheumatise if he stood up to 's neck in the pool of a frosty night.
he cried, with a grin, hurrying to the place indicated, where, skating being out of the question, he made a pair of slides, and gravely exercised himself upon them until his face glowed and his fingers tingled in the frosty air.
It was one January morning, very early--a pinching, frosty morning--the cove all grey with hoar-frost, the ripple lapping softly on the stones, the sun still low and only touching the hilltops and shining far to seaward.
The keen frosty air; the low, rosy, wintry sun; the castle, hailing him like an old acquaintance; the names of friends on door-plates; the sight of friends whom he seemed to recognise, and whom he eagerly avoided, in the streets; the pleasant chant of the north-country accent; the dome of St.
I call to mind a winter landscape in Amsterdam - a flat foreground of waste land, with here and there stacks of timber, like the huts of a camp of some very miserable tribe; the long stretch of the Handelskade; cold, stone-faced quays, with the snow-sprinkled ground and the hard, frozen water of the canal, in which were set ships one behind another with their frosty mooring-ropes hanging slack and their decks idle and deserted, because, as the master stevedore (a gentle, pale person, with a few golden hairs on his chin and a reddened nose) informed me, their cargoes were frozen-in up-country on barges and schuyts.
It was a frosty kind of brightness, too, like that of an icicle in the moonlight.
The weather, too, which had recently been frosty, was now oppressively warm, and there was a great scarcity of water, insomuch that a valuable dog belonging to Mr.
But as I was saying," he resumed, as the negro, still ostentatiously pulling on his yellow gloves, betook himself briskly towards the watering-place, a queer music-hall figure against that grey and frosty scene--"as I was saying, I couldn't describe the man very minutely, but he had a flourish and old-fashioned whiskers and moustachios, dark or dyed, as in the pictures of foreign financiers, round his neck was wrapped a long purple scarf that thrashed out in the wind as he walked.