- 行业: Weather
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The American Meteorological Society promotes the development and dissemination of information and education on the atmospheric and related oceanic and hydrologic sciences and the advancement of their professional applications. Founded in 1919, AMS has a membership of more than 14,000 professionals, ...
A cold front in which the upper level portion of the front moves at a faster speed than the low-level portion. Eventually, the front evolves into two distinct parts rather than one continuous front. As the upper front moves ahead of the lower front, deep clouds and embedded rain bands form well ahead of the surface frontal position. See katafront.
Industry:Weather
A cold squally south or southwest wind over the pampas of the Argentine and Uruguay, which sets in with the passage of a cold front; the South American counterpart of a norther. It is often accompanied by squalls, thunderstorms, and a sudden drop of temperature. The pampero seco is rainless; the pampero sucio brings a duststorm. Compare minuano; See zonda.
Industry:Weather
A coefficient of a predictor or an additive constant in a regression equation. The term is usually used in the context of linear or multiple linear regression. See regression.
Industry:Weather
A coefficient designed to measure the combined effect of temperature and moisture on the formation of soil humus. It is obtained by dividing the annual rainfall (mm) by the mean annual temperature (°C). When the rain factor is below 50, salty and sandy soils form; above this value the soil type passes through laterite, brown earth, and black earth to earth humus and leached soil with the rain factor above 160.
Industry:Weather
A code (part synoptic code and part aviation operations) in which certain observable meteorological elements and certain aircraft data are encoded and transmitted from transport aircraft.
Industry:Weather
A cloud variety, the elements of which are arranged in straight parallel bands. Owing to the effect of perspective, these bands seem to converge toward a point on the horizon, or, when the bands cross the entire sky, toward two opposite points (radiation points, V points, vanishing points, radiant points). This variety occurs in the genera cirrus, altocumulus, altostratus, and stratocumulus, and may modify many of the species, but principally stratiformis. See cloud classification, cloud streets.
Industry:Weather
A coastal local wind that blows from sea to land, caused by the temperature difference when the sea surface is colder than the adjacent land. Therefore, it usually blows on relatively calm, sunny, summer days, and alternates with the oppositely directed, usually weaker, nighttime land breeze. As the sea breeze regime progresses, the wind develops a component parallel to the coast, owing to the Coriolis deflection. See lake breeze, brisa, doctor, virazon, sea-breeze front.
Industry:Weather
A cloud variety, usually of the species stratiformis, in which distinct spaces between its elements permit the sun, moon, blue sky, or higher clouds to be seen. These openings may be very small. This variety is found only in the genera altocumulus and stratocumulus. See cloud classification.
Industry:Weather
A cloud supplementary feature for precipitation falling from a cloud and apparently reaching the earth's surface. See cloud classification; Compare virga.
Industry:Weather
A cloud species consisting of a very extensive horizontal layer or layers that need not be continuous. This species is the most common form of the genera altocumulus and stratocumulus and is occasionally found in cirrocumulus. See cloud classification.
Industry:Weather
