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Fog drip is water dripping to the ground during fog. It occurs when water droplets from the fog adhere to the needles or leaves of trees or other objects, coalesce into larger drops and then drop to the ground. [1] Fog drip can be an important source of moisture in areas of low rainfall, or in areas that are seasonally dry.
The water vapor produces the sea smoke fog and is usually misty and smoke-like. [30] Garúa fog near the coast of Chile and Peru [31] occurs when typical fog produced by the sea travels inland but suddenly meets an area of hot air. This causes the water particles of fog to shrink by evaporation, producing a "transparent mist".
A fog desert is a type of desert where fog drip supplies the majority of moisture needed by animal and plant life. [1] Examples of fog deserts include the Atacama Desert of coastal Chile and Peru ; the Baja California desert of Mexico ; the Namib Desert in Namibia ; [ 1 ] the Arabian Peninsula coastal fog desert ; [ 2 ] and a manmade instance ...
Mist is a phenomenon caused by small droplets of water suspended in the cold air, usually by condensation. Physically, it is an example of a dispersion . It is most commonly seen where water vapor in warm, moist air meets sudden cooling, such as in exhaled air in the winter, or when throwing water onto the hot stove of a sauna .
The trade winds blow the cool air and fog westward over coastal areas, where the fog coalesces into drizzle and mist, the garúa. [1] Garúa is a dense fog that does not produce rain. [2] The water droplets in the fog measure between 1 and 40 microns across, too fine to form rain. [3]
The setup is known as a fog fence, fog collector or fog net. Through condensation , atmospheric water vapour from the air condenses on cold surfaces into droplets of liquid water known as dew . The phenomenon is most observable on thin, flat, exposed objects including plant leaves and blades of grass.
The Pacific Ocean contributes to the frequency of fog by providing atmospheric moisture and temperature. The cold ocean currents cool moist air, causing the water vapor to condense as it meets the warmer coastal air, forming fog. It is also the primary source of nuclei for the condensation of moisture from vapor into cloud droplets.
Thus, fog and mist are not precipitation; their water vapor does not condense sufficiently to precipitate, so fog and mist do not fall. (Such a non-precipitating combination is a colloid .) Two processes, possibly acting together, can lead to air becoming saturated with water vapor: cooling the air or adding water vapor to the air.