- 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, ...
Ice crystals that form and grow in glacial crevasses and in other cavities where a large cooled space is formed and in which water vapor can accumulate under calm, still conditions; a type of hoarfrost. They have an origin similar to that of depth hoar; the typical crystal is a hollow cup with one side opening inward and continued in a hexagonal scroll.
Industry:Weather
In aquifer testing, the pumped well or recharge well, as distinguished from the observation wells.
Industry:Weather
Horizontal wind shear of such a nature that it contributes to the cyclonic vorticity of the flow, that is, it tends to produce cyclonic rotation of the individual air particles along the line of flow. In the Northern Hemisphere, cyclonic shear is present if, when one faces downwind, the wind speed increases from left to right across the direction of flow; the opposite is true in the Southern Hemisphere. Compare anticyclonic shear.
Industry:Weather
Graphical representation of the meteorological conditions observed at successive times in a cross section of the atmosphere.
Industry:Weather
Having a sense of rotation about the local vertical the same as that of the earth's rotation: that is, as viewed from above, counterclockwise in the Northern Hemisphere, clockwise in the Southern Hemisphere, undefined at the equator; the opposite of anticyclonic.
Industry:Weather
Hoarfrost that exhibits a relatively simple macroscopic crystalline structure; to be distinguished from amorphous frost. Crystalline frosts are classified into five forms: 1) needle; 2) featherlike; 3) plate; 4) cup; and 5) dendritic. Such ice forms are typically developed as a result of deposition at temperatures well below 0°C, the degree of supersaturation and temperature controlling the form.
Industry:Weather
Graphic representation of the atmospheric state in a vertical plane, usually in the form of a diagram having either the height or function of pressure as the vertical axis.
Industry:Weather
Generally, an outline or configuration of a body or surface. Often, the term is used for one of a set of lines (contour lines) drawn to represent the configuration of a surface; this is the case in meteorology, where a contour usually refers to a contour line of constant height on a constant-pressure surface. Sometimes, the term is more loosely used in the general sense of an isopleth. Compare profile.
Industry:Weather
Generally, an instrument designed to measure or estimate the blueness of the sky. The type in most common use is the Linke-scale.
Industry:Weather
