ice fog


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Related to ice fog: Freezing fog

ice fog

[′īs ‚fäg]
(meteorology)
A type of fog composed of suspended particles of ice, partly ice crystals 20-100 micrometers in diameter but chiefly, especially when dense, droxtals 12-20 micrometers in diameter; occurs at very low temperatures and usually in clear, calm weather in high latitudes. Also known as frost flakes; frost fog; frozen fog; ice-crystal fog; pogonip; rime fog.

ice fog

A radiation fog consisting of ice crystals, formed under conditions of clear skies, very low temperatures, and little or no wind. The fog may cause a halo. Sometimes called a frost fog.
References in periodicals archive ?
Ice fog occurs very often (~14%) in the northern latitudes when temperatures go below -15[degrees].
Ice fog crystals can be as small as 5-10 [micro]m and usually have sizes less than 200 [micro]m.
* Ice fog crystal concentrations can be more than 1000 [L.sup.-1]
* Ice fog can be considered as an ice cloud at the surface.
* Ice fog visibility can be obtained from ice water content and ice crystal number concentration that are prognostically predicted from a forecasting model.
* Accurate prediction of ice fog visibility, ice water content, and frost conditions can be used advantageously to help plan for the use of aircraft deicing fluids in northern latitudes.
* Satellite-based nowcasting of ice fog over Arctic regions could be done if future operational satellites (e.g., the Polar Communication and Weather satellite; Trishchenko and Garand 2011) were launched; current satellites have inadequate space and time resolution in Arctic regions.
Overall, the observations and model simulations will be used to better understand ice fog and frost predictions and their microphysical parameterizations.
S., 1965: Ice fog: Low temperature air pollution defined with Fairbanks, Alaska as type locality.