To experience fog an area has to have a relative humidity of near or at 100%. The temperatures must be at or near the dew point. Deserts rarely have the humidity levels needed to produce fog.
Clouds mean water, and deserts have virtually no water.
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To have fog an area must have a relative humidity of about 100%. This happens more frequently along the coast and rarely in the desert.
Desert fog is a meteorological phenomenon that occurs when moisture in the air condenses into tiny water droplets near the ground, creating a misty or foggy atmosphere in arid regions. It can occur in desert areas where there is a sudden increase in humidity or temperature fluctuations, leading to the formation of fog despite the dry conditions.
The Atacama Desert gets its water from fog caught on nets.
With the exception of a few oasis, there is virtually no surface water or aquifers in the Atacama. Nearly all water is brought in by pipelines or aqueducts. Some areas that experience dense fog from the Pacific Ocean have developed equipment to harvest water from the fog for drinking and household use.
Desert air usually has a very low moisture content. Air above a lake would be much more humid.
Plants in a fog desert, like the Atacama Desert in Chile, are adapted to utilize the moisture from coastal fogs. These deserts can support unique plant species such as cacti, succulents, and xerophytes that are able to thrive in low-water environments and rely on fog as a water source. Examples include the Chilean rhubarb (Gunnera tinctoria) and certain species of cacti like Copiapoa cinerea.
Cacti can not grow in most areas of the desert. However, there are a few areas that receive dense fog off of the Pacific Ocean and the condensation from this fog allows cacti to grow in these areas.
The air in the desert is usually quite dry and the temperature rarely falls to the dew point at night.
I would say fog is just weather.
Fog?