Types Of Fogs And The Foggiest Places

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Types of Fogs and the Foggiest places in U.S. Fog, “like any cloud, usually forms in one of two ways: (1) by cooling-air is cooled below its saturation point (dew point); and (2) by evaporation and mixing-water vapor is added to the air by evaporation, and mixing-water vapor is added to the air by evaporation, and the moist air mixes with relatively dry air.” (Ahrens & Samson, 2011, p. 97)
Radiation Fog, (ground fog)- Occurs when the radiational air temperature is below its dew point over land. The best conditions are when dry air overlay’s a thin layer of humid air during a clear night. These conditions allow for cooling of the ground to happen fast due to the thin layer, humid layer does not take in much earth’s departing infrared radiations.
Advection fog, conditions call for hot and humid air to blow over a cool surface, since the surface cools the air. The dew point temperature has to be cool enough as the air temperature which causes condensation to form and creates a dense fog to form. “As the warm air cools, the temperature will reach the dew point temperature, forcing the water vapor to condense into a cloud.” (Masters, 2016)
Upslope fog, this type of fog may occur on mountain tops when cold air blows up a slope known as, orographic uplift. The air condenses since it builds up moisture as the cold rises. Evaporation (mixing) fog, this type of fog forms when two unsaturated masses of air are combined.
Some of the foggiest places that we can see these events

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