- المجال: 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, ...
1. A range of wavelengths. 2. Frequency band. 3. Absorption band. 4. A range of radar frequencies, such as X band, S band.
Industry:Weather
1. A severe storm at sea during which spray and precipitation freeze onto the decks and rigging of boats. 2. (Also spelled berber. ) In the Gulf of St. Lawrence, a local form of blizzard in which the wind-borne ice particles almost cut the skin from the face. 3. Same as frost smoke.
Industry:Weather
1. A sudden change in the weather; usually applied to the end of an extended period of unusually hot, cold, wet, or dry weather. 2. A hole or gap in a layer of clouds (see breaks in overcast). 3. See windbreak.
Industry:Weather
1. A protected area, or group of protected areas, set aside to support conservation of biological diversity and sustainable uses of terrestrial and coastal/marine ecosystems. 2. Areas nominated by their owner(s) and internationally designated by UNESCO as biosphere reserves under the Man and the Biosphere Program.
Industry:Weather
1. A perceptual property related but not identical to luminance. The brightness of an object depends not only on its luminance but also on that of its surroundings. For example, an object of uniform luminance will appear brighter against a dark background than against a bright background. 2. See radiance.
Industry:Weather
A rare and randomly occurring bright ball of light observed floating or moving through the atmosphere close to the ground. Observations have widely varying identifying characteristics for ball lightning, but the most common description is that of a sphere having a radius of 15–50 cm, orange or reddish in color, and lasting for only a few seconds before disappearing, sometimes with a loud noise. Most often ball lightning is seen in the vicinity of thunderstorms or a recent lightning strike, which may suggest that ball lightning is electrical in composition or origin. Considered controversial due to the lack of unambiguous physical evidence for its existence, ball lightning is becoming more accepted due to recent laboratory recreations resembling ball lightning. Despite the observations and models of these fire balls, the exact mechanism(s) for naturally occurring ball lightning is unknown.
Industry:Weather
1. A northeasterly gale that occurs in southeast Australia in summer, with low pressure to the northwest and high pressure off the coast of New South Wales. It sometimes blows for three days, with thick overcast weather and heavy rain (visibility as low as a quarter of a mile). See northeaster. 2. A northeast gale on the east coast of North Island, New Zealand, that lasts for several hours and is accompanied by dark clouds and heavy rain. See black squall.
Industry:Weather
1. A dry freeze with respect to its effects upon vegetation, that is, the internal freezing of vegetation unaccompanied by the protective formation of hoarfrost. A black frost is always a killing frost, and its name derives from the resulting blackened appearance of affected vegetation. 2. Among some fishermen, a steam fog that extends above the bridge level of the fishing boats. If the steam fog does not reach this height, it is a white frost.
Industry:Weather
1. A collimated source of electromagnetic radiation (e.g., a laser beam). 2. A collimated source of atoms, molecules, or subatomic particles (e.g., an electron beam).
Industry:Weather
1. A binary unit of information. 2. A small piece of sea ice; a single fragment of brash.
Industry:Weather
