What is Fog?
[[File:Fog in Wawayanda State Park 01.jpg|thumb|Morning fog in park]] [[File:Fog.jpg|thumb|Fog near a [[tree]].]] [[File:21-224-5054 NNP Synevyr RB 18.jpg|thumb|Fog in autumn forest]] '''Fog''' is a [[Meteorology|meteorological]] [[phenomenon]]. It is [[stratus cloud]]s on the surface of the Earth. Fog may appear on [[land]] or [[sea]] and it usually lowers [[visibility]] (makes it hard to see very far). When the air chills, [[moisture]] will turn to fog. Fog is made up of tiny water droplets or, in very cold conditions, ice crystals. When seen on a high speed camera, (a special camera that takes many frames and can view videos at very low speed) it looks like hundreds of small water droplets moving through the air. These water droplets make up the fog or mist. There are many types of fog, classified according to what makes the [[condensation]]. They include evaporation fog, advection fog, radiation fog, and upslope fog. The thickness of fog varies depending on the atmosphere, temperature, weather and location. <gallery> Image:Crepuscular rays with reflection in GGP.jpg|Crepuscular rays made by tree shadows over fog Image:Lienz SG8.JPG|The morning fog in the [[Rhine Valley]] between Lienz / [[Altstätten]] and [[Rüthi]]. Image:Nebelostfriesland.jpg|Ground fog in [[East Frisia]] (Moordorf) File:Sunrise in the fog 7723.jpg|A foggy sunrise </gallery> == Other websites == {{commonscat-inline}} * {{Cite web |url=http://www.geography.hunter.cuny.edu/~tbw/wc.notes/5.cond.precip/clouds/fog_map.htm |title=Map of the United States showing days of heavy fog in each location |work=geography.hunter.cuny.edu |accessdate=22 April 2010 |archive-date=15 June 2010 |archive-url=https://web.archive.org/web/20100615110736/http://www.geography.hunter.cuny.edu/~tbw/wc.notes/5.cond.precip/clouds/fog_map.htm |url-status=dead }} [[Category:Weather]]