fog that is composed of small suspended ice crystals. Common in Arctic locations when temperatures are below -30° Celsius and a abundant supply of water vapor exists.
Same as Freezing Fog; a suspension of numerous minute ice crystals in the air, or water droplets at temperatures below 0º Celsius, based at the Earth's surface, which reduces horizontal visibility; also called ice fog.
a dense winter fog containing ice particles
A type of fog, composed of suspended particles of ice. It occurs at very low temperatures, and usually in clear, calm weather in high latitudes. Temperatures of –20° F and colder are needed to keep the vapor as ice and is very common at temperatures below –40° F.
Fog composed of ice crystals instead of water droplets. Ice fog forms when clear and calm conditions prevail in extremely cold arctic air.
A type of fog composed of tiny suspended ice particles that forms at a very low temperature.
(Also called ice-crystal fog, frozen fog, frost fog, frost flakes, air hoar, rime fog, pogonip.) A type of fog, composed of suspended particles of ice, partly ice crystals 20 to 100 μm in diameter, but chiefly, especially when dense, droxtals 12–20 μm in diameter. It occurs at very low temperatures, and usually in clear, calm weather in high latitudes. The sun is usually visible and may cause halo phenomena. Ice fog is rare at temperatures warmer than −30°C, and increases in frequency with decreasing temperature until it is almost always present at air temperatures of −45°C in the vicinity of a source of water vapor. Such sources are the open water of fast-flowing streams or of the sea, herds of animals, volcanoes, and especially products of combustion for heating or propulsion. At temperatures warmer than −30°C, these sources can cause steam fog of liquid water droplets, which may turn into ice fog when cooled ( see frost smoke). See ice-crystal haze, arctic mist.
Fog that is composed of minute ice particles. It occurs in very low temperatures under clear, calm conditions in the polar latitudes and may produce a halo around the sun or moon.
a suspension of numerous minute ice crystals in the air, reducing visibility at the earth's surface; the crystals often glitter in the sunshine; ice fog produces optical phenomena such as luminous pillars and small haloes.
