- 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 analogy between the flow of a shallow liquid and the flow of a compressible gas. Various phenomena such as shock waves (hydraulic jumps) occur in both systems. The analogy requires neglect of vertical accelerations in the liquid, and restrictions on the ratio of specific heats for the gas.
Industry:Weather
The amount of energy required to remove an electron from a given molecule or atom to form an ion; usually expressed in units of electron volts.
Industry:Weather
The approximate outer limits of a porous medium with significant differences in hydrogeological properties from that of the adjacent media.
Industry:Weather
The amount of irrigation water that infiltrates past the root zone and returns fully or partially to the drainage network or system.
Industry:Weather
The altitude read directly from a pressure altimeter when set to the prescribed altimeter setting. This value differs from the corrected altitude as a function of the difference between the actual density of the underlying air and that of the standard atmosphere. The vertical separation of aircraft on airways is based on indicated altitude, and in general, standard aircraft operating procedure calls for the use of indicated altitude.
Industry:Weather
That region in space in which interference between wave trains occurs. In microwave propagation, it refers to the region bounded by the ray path and the surface of the earth that is above the radio horizon. Interference lobes and height-gain patterns are formed in this region by the addition of the direct and the surface-reflected wave. By contrast, the diffraction zone lies below the radio horizon.
Industry:Weather
That portion of the electromagnetic spectrum lying between visible light and microwaves. The wavelength range is approximately between 720 and 1 mm. In meteorology, this range is often further divided into the solar infrared and terrestrial radiation, with the division occurring around 4 μm. Dominant absorbers of infrared radiation include the earth's surface, clouds, water vapor, and carbon dioxide. By Kirchhoff's law, these are also good emitters of infrared radiation.
Industry:Weather
That portion of a glacier where a sudden steepening of descent causes a chaotic breaking up of the ice.
Industry:Weather
That part of fluid mechanics restricted to fluids in which the velocity (linear or angular) of mass motion does not vary from point to point. Although the combining form hydro comes from a Greek word meaning water, the term hydrostatic is used for gases as well as liquids. When applied to the atmosphere, hydrostatic equilibrium and hydrostatic pressure logically ought to become aerostatic equilibrium and aerostatic pressure, but these terms are rarely used.
Industry:Weather
Term used to describe what has been traditionally called a growing degree-day. Also used to describe the result of using different formulas for calculating growing degree-days. This term is often used to avoid the confusion of the term “growing degree-day” wherein more than one “day” can be accumulated within a 24-h period due to differences in plant type.
Industry:Weather
