- 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, ...
The radiative energy per unit time and unit area. The radiative flux density is obtained through integration over all radiances in a hemisphere.
Industry:Weather
The radiative energy per unit time and unit area. The radiative flux density is obtained through integration over all radiances in a hemisphere.
Industry:Weather
The lowest atmospheric layer immediately adjacent to a surface covered with relatively large roughness elements such as stones, vegetation, trees, or buildings. The roughness sublayer extends from the surface up to about two to five times the height of the roughness elements and includes the canopy layer. Within the roughness sublayer the flow is three-dimensional, since it is dynamically influenced by length scales of individual roughness elements and surface layer scaling cannot be expected to apply. Compare aerodynamic roughness length.
Industry:Weather
A turbulent, altocumulus-type cloud formation found in the lee of some large mountain barriers, particularly in the Sierra Nevada near Bishop, California. The air in the cloud rotates around an axis parallel to the range. The term was first applied to clouds of this type in Europe, especially in the Riesengebirge and on Crossfell. The rotation may extend to the ground, cause hazards to aircraft, and carry large amounts of dust aloft. Rotor clouds are often associated with lee wave (lenticular) clouds that may be present above. See Bishop wave.
Industry:Weather
A description of the properties of the wind-generated waves on the surface of the sea.
Industry:Weather
1. The probability distribution specifying the exceedance probability of different rainfall depths for a given duration (such as 1 hour, or a 24-hour day). The exceedance frequency is often reported as a return period (in years), which is the reciprocal of the annual exceedance frequency. 2. The expected number of times, during a specified time period, that a given precipitation depth will be exceeded.
Industry:Weather
(Symbol ‰. ) Per thousand or 10<sup>−3</sup>; used in the same way as percent (%, per hundred, 10<sup>−2</sup>). Per mille (by weight), is commonly used in oceanography for salinity and chlorinity; for example, a salinity of 0. 03452 (or 3. 452 percent), is commonly stated as 34. 52 per mille.
Industry:Weather
A depiction of a three-dimensional object that results from stereoscopic viewing. A stereo image is obtained by simultaneously viewing a cloud, for example, from satellites at different locations from which the height of the cloud may be determined.
Industry:Weather
Information issued by a meteorological watch office concerning the occurrence or expected occurrence of en route phenomena that may affect the safety of aircraft operations, such as convection, turbulence, and icing.
Industry:Weather
1. The study of atmospherics, especially from a meteorological point of view. This involves techniques of locating and tracking atmospherics sources and evaluating received signals (waveform, frequency, etc. ) in terms of source. 2. Same as atmospherics.
Industry:Weather
