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BR
Usado para
mist
Definição1
Suspension in the air of microscopic water droplets or wet hygroscopic particles which reduce the visibility at the Earth's surface.
Fonte1
WORLD METEOROLOGICAL ORGANIZATION. International Meteorological vocabulary. 2nd ed. Geneva, 1992. (WMO, n.182). Disponível em: < https://library.wmo.int/index.php?lvl=notice_display&id=220#.XeauGOhKiUk >. Acesso em: 22 mar. 2022.
Definição2
The condition in which the horizontal visibility at the surface of the Earth is between 3000 and 10,000 ft (1-3 km) because of suspended water droplets or ice crystals in the air. The relative humidity in mist is between 95 and 100%.
Fonte2
AMERICAN METEOROLOGICAL SOCIETY. Glossary of meteorology. [S.l., última modificação 05 oct. 2015]. Disponível em: < http://glossary.ametsoc.org/wiki/Main_Page >. Acesso em: 22 mar. 2022.
Definição3
Visible water vapour, in the form of very fine droplets, in the atmosphere.
Fonte3
CROCKER, David. Dictionary of aviation. 2nd ed. London: A&C, 2005.
Fonte4
INTERNATIONAL CIVIL AVIATION ORGANIZATION. Manual of runway visual range observing and reporting practices. 3rd. ed. Montreal, 2005. (Doc. 9328 AN/908).
Nota adicional1
The term mist is used in weather reports when there is such obscurity, and the corresponding relative humidity is 95% or more, but is generally lower than 100%.
Nota adicional2
Mist may be considered an intermediate between fog and haze; its particles are smaller in size, it has lower relative humidity than fog, and does not obstruct visibility to the same extent. There is no distinct line, however, between any of these.
Nota adicional3
Mist is thinner than fog.
Nota adicional4
BR (mist) is reported when it reduces visibility to between 5/8 mile and six miles, inclusive.
Contexto
The present weather occurring at the aerodrome shall be observed and reported as necessary. The following present weather phenomena shall be identified, as a minimum: rain, drizzle, snow and freezing precipitation (including intensity thereof), haze, mist, fog, freezing fog and thunderstorms (including thunderstorms in the vicinity).
Mist and fog are, in many parts of the world, the primary causes for visibility restrictions of operational significance.
Note that for the determination of fog, mist and haze, however, the range of these instruments can be limited to a few kilometres. Three types of visibility instruments used in the determination of fog, haze and mist are described below.
Subárea1
Aeronautical Meteorology
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