- 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, ...
1. Same as triple state. 2. A junction point within the tropics of three distinct air masses, considered to be an ideal point of origin for a tropical cyclone.
Industry:Weather
1. Same as thermodynamic efficiency. 2. In climatology, an expression of the effectiveness of temperature in determining the rate of growth, assuming sufficient moisture. The idea was introduced by B. E. And G. J. Livingston (1913). It was applied by C. W. Thornthwaite (1948) in his system of climatic classification. The recognition of this general concept led to one of the first uses of the degree-day, that is, application to plant growth and relationship to the phenological effective temperature of about 42°F. Compare precipitation effectiveness.
Industry:Weather
1. See trade winds. 2. Of or pertaining to the trade winds or the region in which the trade winds are found.
Industry:Weather
1. See temperature zone. 2. (Rare. ) The “belt” that may be drawn on a thermograph trace or other temperature graph by connecting the daily maxima with one line and the daily minima with another.
Industry:Weather
1. See forecast verification. 2. In expert systems, the process of ensuring that the knowledge base is correct and complete, adequately modeling human expertise. See validation.
Industry:Weather
1. Same as potential instability. 2. (Obsolete. ) The instability of a fluid layer heated from below.
Industry:Weather
1. Same as river basin. In this sense, the term is most commonly applied to relatively small areas. 2. Same as divide. (Apparently this use is becoming obsolete. )
Industry:Weather
1. Any one of several possible horizontal belts of vegetation type found in mountainous terrain. These belts are primarily the result of vertical temperature variation. See, for example, frostless zone, timber line. 2. An elevation band along mountain and other terrain slopes where nighttime surface temperatures remain relatively mild compared with temperatures above and below. Drainage winds carry the coldest air down the slopes to the bottom of the valley. The belt of warmer air (thermal belt) lies above this pool of cold air. Above the warm belt, temperature exhibits its normal decline with elevation, augmented by increased radiation loss from lower air density and lower moisture content at higher altitudes. The impact of this milder slope climate is a longer growing season, an earlier leafing out and blossoming of trees and other vegetation, and the ability to grow crops that could not survive at lower or higher elevations (e.g., vineyards). Geiger (1965) suggests that this effect influenced early settlement locations: “In Germany this area was preferred for the earliest villages, monasteries, and country houses. ”
Industry:Weather
1. Often the ratio of any transmitted to incident irradiance. See Also transmission coefficient. 2. (Also called transmissibility. ) Measure of aquifer permeability, defined as the volume of water passing through a vertical surface of unit width per unit head gradient across the surface.
Industry:Weather
