- 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, ...
1. Un establishment scientifico dedicato a rendere particolarmente precisi e dettagliati meteorologici, geofisici e relativi fenomeni astronomici. 2. (Obsoleto). Un luogo dove solo sinottico e sono state fatte osservazioni meteorologiche radar.
Industry:Weather
Colorless, inflammable gas of formula CH<sub>4</sub>; the simplest hydrocarbon. Methane enters the atmosphere as a result of the anaerobic decay of organic matter in, for example, swamps and rice paddies, and is also produced in large quantities by cattle and termites. It is formed along with coal and oil in fossil fuel deposits, and released to the atmosphere on mining. Methane is itself burned as a fuel, being the major constituent of natural gas. The atmospheric mixing ratio of methane is currently about 1. 7 parts per million and has been rising gradually since the industrial era began. The atmospheric lifetime of methane is about eight years. As well as influencing the chemistry of the atmosphere, methane is a strong greenhouse gas and an important source of stratospheric water vapor, and it contributes to global warming.
Industry:Weather
A mirage in which the angular height of the image is greater than that of the object. As the width is unaffected (the angular width of image width remains that of the object because the refractive index gradient is vertical), the aspect ratio is altered and distant images appear vertically enlarged. Towering often accompanies sinking.
Industry:Weather
That part of a thermometric instrument that is directly affected by its thermal state. Thus, in a resistance thermometer, the resistor is the temperature-sensing element.
Industry:Weather
The process by which the large electric fields found within thunderclouds are generated; the process by which particles bearing opposite electrical charge are given those charges and transported to different regions of the active cloud. Accounting for the rapid and extensive separation of electric charge within thunderstorms is still one of the central problems in the study of thunderstorm electricity. Many theories have been proposed to explain charge separation, including the breaking-drop theory, the ion-capture theory, a theory involving the Workman–Reynolds effect, and a mechanism involving the bounce of ice crystals from growing graupel. None is entirely satisfactory in being able to account fully for the observed charge separation required to maintain a very active thunderstorm producing one discharge per second or so. Much evidence points toward particle-size difference and hence falling- speed difference as a necessary factor in the transportation of the oppositely charged particles in opposite directions in the updrafts of convective clouds, in regions where ice crystals are produced in the presence of graupel in regions between updraft and downdraft.
Industry:Weather
The process by which regions of net positive and negative electric charges are produced in clouds.
Industry:Weather
The procedure of assigning different degrees of importance to values of a variable or to statistics according to some measures of reliability, areal coverage, etc.
Industry:Weather
The problem in turbulence analysis that occurs when Reynolds averaging is applied to Navier–Stokes equations; the result is that there are more unknowns than equations. In order to solve the problem, assumptions have to be made concerning the unknown quantities in the equations. These unknowns appear as correlations between the fluctuating quantities. The simplest closure is the so-called ''K'' theory. A more advanced form is the direct interaction approximation.
Industry:Weather
The preparation of equipment for operation in conditions of winter weather. This applies to preparation not only for cold temperatures, but also for snow, ice, and strong winds.
Industry:Weather
The prediction of wave conditions in the ocean, usually based on output from a wave model. See wave modeling.
Industry:Weather
