- 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 whirlwind or waterspout accompanied by lightning in the Mediterranean and Greece.
Industry:Weather
A wave (in a fluid) moving with no change in streamline pattern, and which, therefore, is a stationary wave relative to a coordinate system moving with the wave.
Industry:Weather
A wave on a fluid surface, of sufficiently short wavelength, in which gravity is the dominant influence. Same as capillary wave.
Industry:Weather
A wave that has a small extent in the direction perpendicular to the direction of propagation. Most waves in the ocean are short-crested.
Industry:Weather
A wave that is controlled to a significant degree by both surface tension and gravity.
Industry:Weather
A wave with nodes that are stationary relative to the given coordinate system. Any permanent wave may be rendered stationary by appropriately chosen coordinates. In meteorology the coordinate system is usually fixed with respect to the earth, so that a stationary wave usually refers to one that is stationary relative to the earth's surface. See standing wave.
Industry:Weather
A weak meridional circulation in the high-latitude troposphere characterized by ascending motion in the subpolar latitudes (50°–70°), descending motion over the pole, poleward motion aloft, and equatorward motion near the surface. As a residual of many transient weather systems, the polar cell is barely detectable in means with respect to time of latitude–height cross sections.
Industry:Weather
A wavenumber, wavelength, or frequency band within a Fourier energy spectrum that has a relative minimum of spectral energy. Much of the theoretical development of turbulence in the atmosphere is based on the assumption of a spectral gap between larger-wavelength motions (called mean motions) and small- scale motions (called turbulence). However, a growing body of experimental evidence indicates that there is often not a spectral gap in the atmospheric boundary layer, thereby raising questions about the Reynolds averaging approach that has formed the basis for turbulence theory for the past century.
Industry:Weather
A water mass found in the permanent thermocline between the Gulf Stream and the continental shelf north of Cape Hatteras (35°N); similar properties as North Atlantic Central Water but about 0. 8 psu lower in salinity.
Industry:Weather
