Fog Formation and Types

Condensation: Fog forms when moist air near the ground cools and reaches its dew point, causing water vapor to condense into tiny water droplets. 

Radiation Fog: Occurs on clear, calm nights when the ground loses heat through radiation, cooling the air near the surface and forming fog. 

Advection Fog: Forms when warm, moist air moves horizontally over a cooler surface, causing the air to cool and condense into fog. 

Upslope Fog: Develops as moist air is lifted along an elevated terrain, cooling and condensing into fog on the windward side of hills or mountains. 

Evaporation (Steam) Fog: Forms when cold air passes over a warm water surface, causing water vapor to rise and condense into fog. 

Freezing Fog: Similar to regular fog, but the water droplets freeze upon contact with cold surfaces, creating icy or frosty conditions. 

Valley Fog: Common in valleys during cool, calm nights, as cool air settles near the valley floor and forms fog. 

Ice Fog: Occurs in extremely cold conditions when water vapor freezes directly into ice crystals, creating a foggy appearance in frigid air masses. 

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