- 行业: Weather
- Number of terms: 60695
- Number of blossaries: 0
- Company Profile:
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, ...
A special form of the aspiration psychrometer, developed by Assmann. Two mercury thermometers, mounted vertically side by side in a chromium- or nickel-plated polished metal frame, are connected by ducts to an aspirator. Each thermometer is located inside a pair of coaxial metal tubes, highly polished inside and out, that screen the bulbs from solar radiation.
Industry:Weather
A psychrometer in which the ventilation is provided by a suction fan. The aspirator may be driven by a spring or an electric motor. Alternatively, psychrometers with natural ventilation are also in use.
Industry:Weather
A thermograph for which ventilation is provided by a suction fan.
Industry:Weather
A device attached to a meteorological instrument to provide ventilation. In its usual form it consists of a suction fan.
Industry:Weather
An instrument for the continuous recording of two or more meteorological parameters for which the ventilation is provided by a suction fan.
Industry:Weather
The collecting element in the type of ion counter that uses the method of perpendicular velocities. It consists of a cylindrical condenser that is electrically charged so that the radial field produced will collect the ions from the aspirated air.
Industry:Weather
A thermometer for which ventilation is provided by a suction fan.
Industry:Weather
The ratio of height-to-length scales (D/L) characteristic of a fluid flow or of a physical model prototype, used for scaling of equations or for constructing physical (e.g., wind tunnel) models.
Industry:Weather
Dust devils made visible by loose ash from the earth's surface that is picked up or entrained by the rotating column of air. For example, after the eruption of the Mount St. Helens volcano in western Washington state during May 1980, ash devils were frequently observed in the eastern Washington boundary layer during the subsequent summer. Compare dust devil, steam devils.
Industry:Weather
The compass direction toward which a land slope faces. The direction is taken downslope and normal to the contours of elevation.
Industry:Weather
