- 업종: 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, ...
A strong, dusty (or sandy) northwesterly wind that blows seaward along the south coast of Arabia. It is most frequent in winter and early spring.
Industry:Weather
A striking example of an atmospheric lee wave, formed in the lee of the Sierra Nevada near Bishop, California. The phenomenon includes a rotor cloud and a series of lenticular clouds parallel to the crest of the range.
Industry:Weather
A state of the atmosphere in which density depends only upon pressure, that is, a state such that surfaces of constant pressure and constant density coincide, so that the geostrophic wind is independent of height.
Industry:Weather
A small iceberg or iceberg fragment; it also may be a piece of floeberg or hummocked ice; it is larger than a growler.
Industry:Weather
A severe weather condition characterized by high winds and reduced visibilities due to falling or blowing snow. The U. S. National Weather Service specifies a wind of 30 knots (35 miles per hour) or greater, sufficient snow in the air to reduce visibility to less than 400 m (0. 25 miles). Earlier definitions also included a condition of low temperatures, on the order of −7°C (20°F) or lower, or −12°C (10°F) or lower (severe blizzard). The name originated in the United States but it is also used in other countries. In the Antarctic the name is given to violent autumnal winds off the ice cap. In southeastern France, the cold north wind with snow is termed blizzard (see also boulbie). Similar storms in Russian Asia are the buran and purga. In popular usage in the United States and in England, the term is often used for any heavy snowstorm accompanied by strong winds.
Industry:Weather
A severe tropical thundersquall that occurs on the south coast of Cuba, especially near the Bight of Bayamo.
Industry:Weather
A set of mathematical conditions to be satisfied, in the solution of a differential equation, at the edges or physical boundaries (including fluid boundaries) of the region in which the solution is sought. The nature of these conditions is usually determined by the physical nature of the problem, and is a necessary part of the problem's complete formulation. Common boundary conditions for the atmosphere are that the velocity component normal to the earth's surface vanish, and that the individual derivative of pressure vanish at the upper surface. The term is also used in the context of the time evolution of an “open” dynamical system that interacts with other “external” systems. The state of the external systems must be specified as a boundary condition to infer the evolution of the dynamical system under consideration. For example, the evolution of the earth's atmospheric state requires the specification of sea surface temperature as a boundary condition. See kinematic boundary condition, dynamic boundary condition, boundary-value problem, initial condition.
Industry:Weather
