- 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, ...
Manner in which the depth of rainfall varies in space and time.
Industry:Weather
Long-term increases in mean sea level. The expression is popularly applied to anticipated eustatic sea level changes due to the greenhouse effect and associated global warming.
Industry:Weather
Liquid precipitation at temperatures below freezing. At midlatitudes, supercooled rain often forms first as an ice crystal or snow in the clouds, which then melts as it falls through an elevated layer of air warmer than freezing before reaching the thick bottom layer of cold air that cools the drop below freezing. A supercooled drop freezes instantly on contact with surfaces such as electrical power lines, trees, and roads during an ice storm. See glaze.
Industry:Weather
Local weather forecasting that is based purely on observation of the weather elements for the same locality. The application of experience in synoptic meteorology, combined with physical reasoning, is capable of producing reasonably reliable local forecasts for a few hours ahead; in some situations reliability is possible for an appreciable time ahead. The observations chiefly used in such forecasting are those of pressure and pressure tendency, wind velocity at surface and higher levels, cloud, and temperature.
Industry:Weather
Local name for the westerly sea breeze on the west coast of Italy, and especially in Rome.
Industry:Weather
Literally, the grouping of sediment particles into size classes or grades.
Industry:Weather
Lightning with extraordinary lateral extent near a cloud base where its dendritic structure is clearly visible. This lightning type is prevalent beneath the stratiform anvil of mesoscale convective systems and is often associated with positive ground flashes. This discharge form is also referred to as sheet lightning.
Industry:Weather
Literally, an optical phenomenon that occurs only rarely. As such, this would hardly seem to merit discussion. Yet the literature is replete with discussions of frequently occurring optical phenomena that are nevertheless described by authors as being rare. The explanation for this discrepancy is to be found in the difference between a rare event and a rarely observed event. The authors who characterize, say, a green flash as rare are undoubtedly doing so on the basis of their having rarely seen one. Yet green flashes can be seen frequently if one knows when and how to look for them. Clearly, a rarely observed event owes as much to the observer as it does to the event. For example, if one were to characterize the frequency of sunrises on the basis of most observer's frequency of observation, one would have to conclude that sunrises are very much rarer than sunsets. There certainly are rare optical phenomena, but there are many more common optical phenomena that are merely rarely observed due to personal habits.
Industry:Weather
Instrument for measuring radiation in the longwave range between 2 and 60 mm. As a horizontal downward-facing black surface, it measures the terrestrial radiation, and as a horizontal upward-facing black surface, it measures the atmospheric radiation.
Industry:Weather
