### cloud | aerosol:

Fog
* Most fog increases humidity.
* Most fog is caused by air
  - moist air
* Most fog occurs in cold weather
  - fogs tend to be found under conditions of light wind
* Some fog occurs on surfaces
  - refers to clouds
* also occurs when the air is cooled below a critical temperature called the dew point.
* are frequent along the coast, especially in summer
  - merely clouds on the surface of Earth
  - rare, and are usually confined to the early morning hours of midwinter
* begins to form when water vapor condenses into tiny liquid water droplets suspended in the air.
* can act like a brick wall to lasers.
* can also form over cold, snow-covered ground as warmer air moves in
  - overnight within a region of higher pressure
  - appear at any time of the year
  - completely block the reflector when other lights remain visible
  - define limits of redwood groves, but fog also plays a key role in water use by the redwoods
  - form suddenly and can dissipate just as rapidly
  - pose a serious threat to motorists
* carries sound and it was often foggy in the mornings.
* classic example as it consists of very small water droplets dispersed in air.
* cloud based on the ground, rather than in the atmosphere.
* cloud in contact with the ground
  - touch with the ground
  - near the ground
* cloud that forms on the ground
  - has formed on the ground
* cloud that touches the ground or the surface of a body of water
  - ground, so the closest clouds get to the ground is to touch it
* combined with smoke can cut visibility to nearly zero.
* comes from landward direction
  - the direction of the ocean
* common factor off the California coast in winter.
* contains very tiny liquid water particles, like a cloud, and floats, like a cloud.
* creates a marbling or curling effect in beams of light, where haze creates a solid light beam.
* form when moist air is cooled, or when cool air has water vapor added to it.
* frequently develops in winter.
* happens frequently in the summer and blizzards and storms in the winter
  - when the water vapor condenses into particles as air temperatures cool
* has a color field.
* helps to define light beams and radiate colors, and can add an eerie ambiance to any scene.
* is an aerosol
  - basically a cloud at ground level
  - changes in temperature and air pressure
  - classified by the way it forms
* is common during the summer months along the immediate coast and major river drainages
  - especially along the coast
* is common in the cold air ahead of a warm front
  - ahead of the front
  - evening and early mornings
  - morning throughout the year
  - summer, rain in the winter
  - valleys on winter mornings, due to nocturnal raditional cooling and drainage flow
  - on the coast
  - composed of billions of tiny water droplets floating in the air
  - essentially very low clouds, consisting of water vapor cooling and beginning to condense
* is formed because the air within the chamber is cooled when the pressure is quickly dropped
  - by five different cooling mechanisms
  - frequent on the plains in the cold season
* is just a cloud at ground level
  - that happens to be hanging around on the Earth's surface
  - less common in the winter
  - literally a cloud on the ground
* is made of small water droplets suspended in the air that reduces visibility
  - tiny liquid water droplets, lightweighted enough to remain suspended in the air
* is made up of tiny water droplets or , in very cold conditions , ice crystals
  - droplets or, in very cold conditions, ice crystals
  - merely a cloud at ground level
* is most common in the fall and spring
  - prevalent and thickest during the morning hours
  - much heavier and thicker than haze and tends to block out the light
* is often a prelude to large thunderstorms
  - present when drizzle falls
  - thickest in valleys and low-lying areas
  - perhaps the best know atmospheric, but all air contains some amount of particulate matter
  - prevalent during summer months
  - produced by vaporizing a special fog fluid under high heat
  - rain before it collects together to form raindrops
  - rare except in winter
  - simulated by blending the color of the fog with the color of each ray
  - the visible aggregate of minute water droplets suspended in the atmosphere near the surface
  - typically thicker in low places as the heavy air flows downward
  - very rare, usually occurring early on winter mornings
* occurs during about one-third of summer days
  - periods
  - more often than any single precipitation type at all temperatures
  - occasionally at any time of the year
* occurs when moisture is cooled and condenses in the atmosphere near the surface of the earth
  - stratus clouds are in touch with the ground surface
  - the air is saturated and the invisible water now becomes visible
* often appears in low-lying areas
  - develops overnight and comes onshore during the morning
* often forms in low places because as the air cools it becomes heavier and flows downhill
  - on cold,clear nights as the temperatures drop to the dew point temperature
* represents the saturation of air near the ground surface.
* sealing roads process of spraying a thin layer of oil onto a road surface.
* sometimes disappears before mid-day.
* stratus cloud in contact with the ground.
* temporarily increases water potential in Florida scrub oaks.
* usually occurs in low areas such as valleys, canyons and craters
  - surface-based form of stratus
* variation that reaches the ground.
+ Buenos Aires, Weather
  * Buenos Aires has a mild weather. During the 20th century the temperature has gone up because of the urbanization. Rainfall is 1222.6 mm. per year. Summers are warm and humid. Fog is frequent.
+ Liancourt Rocks, Climate: Islands of South Korea
  * Liancourt Rocks can have harsh weather conditions. This is because of its location, and small size. Sometimes, ships are unable to dock because of strong northwestern winds in winter. The climate is warm and humid. It is heavily influenced by warm sea currents. Fog is a common sight. In the summer, southerly winds dominate. The water around the islets is about 10 degrees Celsius in spring, when the water is coolest. It warms to about 25 degrees Celsius in August.
  * Fog is made up of tiny water droplets or, in very cold conditions, ice crystals. These water droplets make up the fog or mist. There are many types of fog, such as evaporation fog, advection fog, radiation fog, and upslope fog. The thickness of fog varies depending on the atmosphere, temperature, weather and location.