- 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, ...
A chart on which climatological information is presented, thus identifying the characteristic values of climatic elements at a station or over an area.
Industry:Weather
A chlorine compound with chemical formula Cl2O2. Its chemical structure is actually ClOOCl, and it is more properly known as dichlorine peroxide. This species plays a critical role in polar ozone destruction. Its formation (from recombination of two chlorine monoxide radicals in a termolecular reaction), followed by its subsequent photolysis to regenerate Cl atoms, is the major ozone depletion mechanism involved in the formation of the antarctic ozone hole.
Industry:Weather
A chart consisting of forecasts issued from differing sources.
Industry:Weather
A change in the state variables, for example, temperature, pressure, density.
Industry:Weather
A camera system specifically designed for use in obtaining cloud photographs for the purposes of determining their locations, movement, or percent of sky coverage. Video or motion picture cameras are operated in a manner that records a new image every second or so in order to follow cloud development (time-lapse photography). Stereographic cloud images may be obtained from cameras at separated locations. Photogrammetric analysis of images with known foreground fiducial points from cameras with known optics can yield quantitative measurements of cloud dimensions and movements. Whole-sky imaging cameras use optics or reflectors with a very wide field of view to record the position of nearly all clouds in the hemisphere of sky overhead to estimate the fractional sky coverage of cloudiness. Conversion of the photographic images to digital form allows automated analysis. Useful data are often limited to daylight periods.
Industry:Weather
A characteristic circulation feature, typically with analogs. An example of a circulation type is an omega block, characterized by a high-amplitude cut-off ridge surrounded to its east and west by high-amplitude cut-off troughs.
Industry:Weather
A belt of the earth's surface within which the climate is generally homogeneous in some respect; an elemental region of a simple climatic classification, for example, a zone defined by the latitudinal distribution of the climatic elements. The expressions polar, temperate, subtropical, tropical, and equatorial climate are used to indicate the climatic zones that succeed each other from the pole to the equator.
Industry:Weather
A boundary between regions having different types of climate. The most effective climatic divides are the crests of mountain ranges. The boundary between two well-defined ocean currents may also act as a climatic divide.
Industry:Weather
A buoyant jet in which the buoyancy is supplied steadily from a point source; the buoyant region is continuous. This is to be distinguished from a thermal, which is a discrete buoyant element in which the buoyancy is confined to a limited volume of fluid. A chimney plume is usually a convective plume. See coherent structures; compare coning, fanning, lofting, looping.
Industry:Weather
A cagelike arrangement of water molecules stabilized by a central guest molecule. Such hydrates exist at higher pressures (> 10 atmospheres) at > 100 m depth in glaciers where air bubbles trapped in the process of firn formation near the surface appear to dissolve in the ice.
Industry:Weather
