- 行业: Weather
- Number of terms: 60695
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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, ...
Any systematic arrangement of meridians and parallels portraying the curved surface of a sphere or spheroid upon a plane. The methods for generating the projection are often classified as geometric or analytic. Geometric projections can be classified according to the type of surface on which the projection is assumed to be developed, such as planes, cylinders or cones. Analytical projections are developed by mathematical computation.
Industry:Weather
The lobe in the radiation pattern of a directional antenna that includes the region of the maximum radiated power. The center of the main lobe defines the beam axis. The beamwidth in a given plane is usually defined as the angle within which the radiated intensity is at least one-half the intensity in the direction of the beam axis. See antenna pattern.
Industry:Weather
Hanging protuberances, like pouches, on the undersurface of a cloud. This supplementary cloud feature occurs mostly with cirrus, cirrocumulus, altocumulus, altostratus, stratocumulus, and cumulonimbus; in the case of cumulonimbus, mamma generally appear on the underside of the anvil (incus). See cloud classification.
Industry:Weather
In meteorology, the process of transcribing weather information onto maps, diagrams, etc. It usually refers specifically to decoding synoptic reports and entering those data in conventional station-model form on synoptic charts. It is done either manually or by computer.
Industry:Weather
One of several constant-pressure levels in the atmosphere for which a complete evaluation of data derived from upper-air observations is required. Currently the mandatory pressure levels are 1000 mb, 850 mb, 700 mb, 500 mb, 400 mb, 300 mb, 200 mb, 150 mb, 100 mb, 50 mb, 30 mb, 20 mb, 10 mb, 7 mb, 5 mb, 3 mb, 2 mb, and 1 mb. The radiosonde code has specific blocks reserved for these data. To have a more complete vertical picture, significant levels of radiosonde observations are also evaluated. Until just after World War II, mandatory levels were defined by values of height above sea level.
Industry:Weather
An instrument for measuring differences of pressure. The weight of a column of liquid enclosed in a tube is balanced by the pressures applied at its opposite ends, and the pressure difference is computed from the hydrostatic equation. A mercury barometer is a type of manometer.
Industry:Weather
One of several constant-pressure levels in the atmosphere for which a complete evaluation of data derived from upper-air observations is required. Currently the mandatory pressure levels are 1000 mb, 850 mb, 700 mb, 500 mb, 400 mb, 300 mb, 200 mb, 150 mb, 100 mb, 50 mb, 30 mb, 20 mb, 10 mb, 7 mb, 5 mb, 3 mb, 2 mb, and 1 mb. The radiosonde code has specific blocks reserved for these data. To have a more complete vertical picture, significant levels of radiosonde observations are also evaluated. Until just after World War II, mandatory levels were defined by values of height above sea level.
Industry:Weather
Hanging protuberances, like pouches, on the undersurface of a cloud. This supplementary cloud feature occurs mostly with cirrus, cirrocumulus, altocumulus, altostratus, stratocumulus, and cumulonimbus; in the case of cumulonimbus, mamma generally appear on the underside of the anvil (incus). See cloud classification.
Industry:Weather
A layer of the atmosphere between two consecutive (or any two) specified mandatory levels.
Industry:Weather
