Ice fog is a type of
fog
Fog is a visible aerosol consisting of tiny water droplets or ice crystals suspended in the air at or near the Earth's surface. Reprint from Fog can be considered a type of low-lying cloud usually resembling stratus, and is heavily influ ...
consisting of fine
ice crystals suspended in the air. It occurs only in cold areas of the world, as
water droplets suspended in the air can remain liquid down to . It should be distinguished from
diamond dust, a
precipitation of sparse ice crystals falling from a clear sky.
Ice fog is not the same thing as
freezing fog, which is commonly called pogonip in the western United States.
In the United States
Ice fog can be quite common in interior and northern
Alaska, since the temperature frequently drops below in the winter months. Ice fog only forms under specific conditions; the
humidity has to be near 100% as the
air temperature drops to well below , allowing ice crystals to form in the air. The ice crystals will then settle onto surfaces.
Supposedly, early settlers called it "white death" because they believed the crystals got into their lungs and caused death.
Beware the Dreaded Fog
''Irish Times''
References
External links
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Fog
Precipitation