- 行业: Weather
- Number of terms: 60695
- Number of blossaries: 0
- Company Profile:
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, ...
In meteorology, a term used loosely to distinguish radiation at wavelengths longer than about 4 μm, usually of terrestrial origin, from those at shorter wavelengths (shortwave radiation), usually of solar origin. See also terrestrial radiation.
Industry:Weather
In meteorology, a scale in which the curvature of the earth is not negligible. This is the scale of the high tropospheric long-wave patterns, with four or five waves around the hemisphere in middle latitudes. These waves are within the province of both the general circulation and synoptic meteorology, but the terminology should distinguish this scale from that of the migratory high and low pressure systems of the lower troposphere. Rossby waves and other long barotropic waves are large-scale disturbances. See cyclonic scale.
Industry:Weather
In Catalonia (northeastern Spain), a hot squally wind descending from the Pyrenees and lasting for a few hours.
Industry:Weather
In astronomy, the line joining the points where the distance of an orbiting body is greatest and where it is least from the attractive body. The line extends infinitely in both directions.
Industry:Weather
In aircraft icing, an extreme form of rime ice, that is, very irregular, opaque, and of low density. Kernel ice forms at temperatures of −15°C and lower.
Industry:Weather
In an antenna pattern, a region of local maximum in the emitted intensity. The strongest lobe is in the pointing direction of a directional antenna and is called the main lobe. The configuration of lobes is determined by three factors: 1) wavelength; 2) geometrical properties of the antenna and feed system; and 3) mutual interference between the direct and reflected rays for an antenna situated above a reflecting surface. The sidelobes or minor lobes are an unavoidable consequence of the finite size of the antenna. Though undesirable, they ordinarily contain much less power than the main lobe. See antenna pattern.
Industry:Weather
In a cloud-to-ground discharge, a leader plus its subsequent return stroke. In a typical case, a cloud-to-ground discharge is made up of three or four successive lightning strokes, most following the same lightning channel.
Industry:Weather
