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ablation zone

ablation zone  

The zone of a glacier in which losses through various processes, such as calving, deflation, melting, etc., exceed any addition through snowfall or accumulation of rime ice. Compare accumulation zone.
freezing fog

freezing fog  

Fog, comprising supercooled droplets (see supercooled cloud) that forms when the air temperature and surfaces exposed to the air are below freezing. The fog droplets freeze instantly on contact with ...
frost

frost  

Traditionally personified as Jack Frost (see Jack).frost giants in Scandinavian mythology, the enemies of Thor.See also so many mists in March, so many frosts in May.
glaze

glaze  

A layer or coating of ice that is generally smooth and clear, and forms on exposed objects by the freezing of raindrops, drizzle, or fog. See also icing.
hail

hail  

Form of precipitation comprising ice in the shape of balls or irregular particles (hailstones), whose concentric structure indicates a growth by coalescence and freezing of supercooled water drops. ...
hoar frost

hoar frost  

Deposit of patterned (‘feathers’, ‘needles’, ‘spines’, etc.) ice crystals on surfaces chilled by radiation cooling. The feature is seen particularly well on vegetation. The ice is derived from the ...
ice

ice  

When the water content of snow falls below about 8% grain growth occurs by vapour flux of the air in the pores. The resulting growth of ice grains is very slow. In general, growth in wet snow speeds ...
icing

icing  

The deposition of ice on aircraft, in the form of frost, glaze, rime, or a mixture of the two last. Icing most commonly occurs at temperatures just below freezing, and its rate increases with the ...

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