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Hoar frost
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hoarfrost

說明

hoarfrost, deposit of ice crystals on objects exposed to the free air, such as grass blades, tree branches, or leaves. It is formed by direct condensation of water vapour to ice at temperatures below freezing and occurs when air is brought to its frost point by cooling.
https://www.britannica.com › science
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2021年1月5日According to the National Weather Service, hoar frost is defined as a "deposit of interlocking crystals formed by ...
2019年2月21日Hoar frost is a type of feathery frost that forms as a result of specific climatic conditions. The word 'hoar' comes from old English and ...
Hoar frostHoar frost, also hoarfrost, radiation frost, or pruina, refers to white ice crystals deposited on the ground or loosely attached to ...
Hoar frost forms when water vapour in the air comes into contact with an object that is below freezing. Rather than the water vapour first condensing onto the ...
From a more scientific standpoint, frost or hoarfrost forms when moisture in the air skips the water droplet stage and appear directly as ice crystals on an ...
2020年3月1日To wrap it up, a hoarfrost is just a frost with a bit more moisture in the atmosphere for the frost to form at greater structures and ...
「Hoar frost」的影片
Description Hoar frost occurs when a sub-zero surface comes into contact with moist air. The water vapour in the air turns directly into ice by sublimation, ...
2018年12月11日Surface hoar frost can lead to a higher avalanche risk. When fresh snow falls on a layer of these fragile crystals ...
Hoar frost is the most dynamic form of ice in caves. Two processes are acting in conjunction to allow for the development of hoar frost: substratum (rock wall) ...

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