- 行业: Weather
- Number of terms: 60695
- Number of blossaries: 0
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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 production of ions by radioactive particles, typically near the surface where radioactive substances exist in the soil.
Industry:Weather
The process of phase transition from solid directly to vapor in the absence of melting. Thus an ice crystal or icicle sublimes under low relative humidity at temperatures below 0°C. The process is analogous to evaporation of a liquid. Colloquially the terms are used interchangeably for the solid–vapor transition (evaporation). For growth, the term sublimation has been replaced by deposition since the 1970s. There is evidence that deposition nucleation does occur, although there may be an adsorbed layer prior to nucleation. It appears that most nuclei in the atmosphere require near–water saturation before they initiate ice.
Industry:Weather
The propagation of radio energy over a smooth spherical earth of uniform dielectric constant and conductivity under conditions of standard refraction in the atmosphere, that is, an atmosphere in which the refractive index decreases uniformly with height at a rate of approximately 40 N-units per kilometer. Standard propagation leads to ray curvature due to refraction with a value approximately one- fourth that of the earth's curvature, giving a radio horizon that is about 15% farther than the distance to the geometric horizon. This is equivalent to straight-line propagation over a fictitious earth with radius of four-thirds the radius of the actual earth. See effective earth radius, superstandard propagation, substandard propagation, standard atmosphere.
Industry:Weather
The progressive development of internal erosion by seepage, appearing downstream as a hole or seam discharging water that contains soil particles.
Industry:Weather
The product of the mass of a particle and its relative velocity; or, in the case of a fluid, the product of density and relative velocity. See momentum.
Industry:Weather
The process of increasing the water stored in the saturated zone of an aquifer.
Industry:Weather
The process of detecting storms or precipitation areas using a weather radar. See radar, radar meteorology.
Industry:Weather
The process of determining depth and water content of snow at representative points, for example, along a snow course.
Industry:Weather
The process by which a snow pack reaches a state where it can yield meltwater, including warming of the snowpack to 0°C, wetting of the snow, and coarsening of the snow texture.
Industry:Weather
