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Produced by the ground cooling. Clear nights with moist air overlain by drier air. Ground cools rapidly because shallow moist air doesn't absorb much IR. Air then cools rapidly.
When warm air moves over a significantly colder surface. Air is cooled to the dewpoint temperature.
Fog that forms as relatively warm, moist air moves over a colder surface that cooled mainly by radiational cooling.
evaporation (mixing) fog
Fog produced by increased water vapor due to evaporation, and moist air mixes with relatively drier air.
Detect infrared radiation. These instruments can be used to indicate cloud height. Cloud temperature is a good indication of height.
Condensation on particles increases scattering of sunlight. Looks like a thin, white veil over horizon.
Describe fog "burn off"
Sunlight penetrates through fog. Warms the ground. Increases temperature of foggy air and some water evaporates. This clears fog. Clearer fog causes more sunlight to penetrate.
If a fog is forming in Denver, Colorado, and the wind is blowing east, then the fog is due to
Upslope fog because of the mountains to the west.
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