- 行业: Weather
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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, ...
Interstellar dust in the region between planets in Earth's solar system.
Industry:Weather
In the study of terrestrial magnetism, a line drawn through all points on the earth's surface having the same magnetic declination; not to be confused with magnetic meridian. The particular isogonic line drawn through all points having zero declination is called the agonic line. Compare isoclinic line, isogon.
Industry:Weather
In the Beaufort wind scale, a wind with a speed equal to or greater than 64 knots (73 mph) or Beaufort Number 12 (Force 12). Hurricane-force winds are not exclusive to hurricanes; they occur quite often in strong nontropical storms such as the northeaster, or even in severe thunderstorms.
Industry:Weather
In the United States, the frequent fog on the slopes of the coastal mountains of California, especially applied when the fog overtops the range and extends as stratus over the leeward valleys.
Industry:Weather
In radar, a term sometimes used to describe 1) the irradiance or power density incident on a target, or 2) the irradiance or power density supplied by a feed to an antenna.
Industry:Weather
In radiation modeling, the assumption that the radiative properties of a given horizontal region (or pixel in a satellite image) may be considered in isolation from neighboring pixels. Its purpose is to allow the application of one-dimensional radiative transfer theory. The accuracy of this approximation depends on the size of the pixel and the degree of heterogeneity within the pixel and between neighboring pixels.
Industry:Weather
In radar or lidar, a target that scatters the same intensity of radiation in all directions. Specifically, for plane-wave incident radiation, an isotropic target scatters in all directions the same power per unit solid angle. Real targets are generally not isotropic, but scatter different intensities in different directions. The concept of an isotropic target is an artifice that allows the scattering properties of a real target to be described in terms of those of an equivalent isotropic target. Thus, the backscattering cross section of a target is the cross-sectional area of an isotropic target that scatters the same intensity in the direction of the radar receiver as the real target. See phase function.
Industry:Weather
In porous mediums, the simultaneous movement of two or more immiscible fluids (i.e., fluids that cannot be mixed together, such as water and oil). The fluids retain distinct phases separated by a phase interface surface. See multiple-phase flow; compare miscible displacement.
Industry:Weather
In popular terminology, a thunderstorm of the air mass type that develops near the end of a hot, humid summer day; this term has no precise technical meaning.
Industry:Weather
