- Industry: 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 short thundersquall on the north Spanish coast, sometimes accompanied by waterspouts.
Industry:Weather
A shift in the energy levels of an isolated atom or molecule as a consequence of an external magnetic field. The energy levels of an atom (or molecule) depend on the internal forces that electrons and nuclei exert on each other as well as on any external forces (e.g., an electromagnetic field). An observable consequence of the Zeeman effect is the shifting and broadening of spectral lines. The Zeeman effect is the magnetic analogue of the Stark effect.
Industry:Weather
A sharp depression in the level of the tropopause; found occasionally above strong frontal zones and intense cyclones. A linear fold of the tropopause often has a funnel-like appearance in a vertical cross section through the fold. See tropopause fold.
Industry:Weather
A seven-channel instrument on Landsat series satellites used to make maps of infrared emission and reflection from the earth. Most thematic mapper images are used to study vegetation, geology, and other surface features.
Industry:Weather
A set of operational weather limits at an airport, that is, the minimum conditions of ceiling and visibility under which visual flight rules may be used.
Industry:Weather
A series of waves propagating together in which the wave direction, wave length, and wave height vary only slightly.
Industry:Weather
A semipermanent trough extending east-northeast to west- southwest from about 35°N in the eastern Pacific to about 15°–20°N in the central west Pacific. A similar structure exists over the Atlantic Ocean, where the mean trough extends from Cuba toward Spain.
Industry:Weather
A semipermanent feature of the atmospheric circulation (usually a high-pressure ridge) on opposite sides of which the prevailing wind directions differ greatly. A good example is the ridge that extends in winter from the Siberian high westward across central Europe and France, and in summer less regularly from the Azores high across Spain and France to central Europe. North of this the prevailing winds are from west-southwest, while south of it they are on the whole northeasterly. Köppen speaks of the polar wind divide, a very diffuse boundary of low pressure between the midlatitude westerlies and the polar easterlies.
Industry:Weather
A self-recording thermometer. The thermometric element is most commonly either a bimetal strip or a Bourdon tube filled with a liquid. In the first case the bimetal element has the form of a helical coil with one end rigidly fastened to the instrument and the other to the recording pen. In the second case the tube is made with an elliptical cross section so that an expression of the liquid caused by a temperature increase will cause the radius or curvature of the bend to increase, thus moving the instrument pen, which is fastened to the tip of the tube. A resistance thermometer and a thermoelectric thermometer may be converted into thermographs if provision is made to record their output. See aspiration thermograph, hygrothermograph, mercury-in-steel thermometer.
Industry:Weather
A scanning Doppler radar mounted in the tail of an airplane, usually employed for helical scanning. See airborne weather radar.
Industry:Weather
