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long-wave perturbation

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  • Perturbation theory (quantum mechanics) — In quantum mechanics, perturbation theory is a set of approximation schemes directly related to mathematical perturbation for describing a complicated quantum system in terms of a simpler one. The idea is to start with a simple system for which a …   Wikipedia

  • Cnoidal wave — US Army bombers flying over near periodic swell in shallow water, close to the Panama coast (1933). The sharp crests and very flat troughs are characteristic for cnoidal waves. In fluid dynamics, a cnoidal wave is a nonlinear and exact periodic… …   Wikipedia

  • Kelvin wave — A Kelvin wave is a wave in the ocean or atmosphere that balances the Earth s Coriolis force against a topographic boundary such as a coastline. A feature of a Kelvin wave is that it is non dispersive, i.e., the phase speed of the wave crests is… …   Wikipedia

  • earthquake — /errth kwayk /, n. 1. a series of vibrations induced in the earth s crust by the abrupt rupture and rebound of rocks in which elastic strain has been slowly accumulating. 2. something that is severely disruptive; upheaval. [1300 50; ME erthequake …   Universalium

  • electromagnetic radiation — Physics. radiation consisting of electromagnetic waves, including radio waves, infrared, visible light, ultraviolet, x rays, and gamma rays. [1950 55] * * * Energy propagated through free space or through a material medium in the form of… …   Universalium

  • Antarctica — /ant ahrk ti keuh, ahr ti /, n. the continent surrounding the South Pole: almost entirely covered by an ice sheet. ab. 5,000,000 sq. mi. (12,950,000 sq. km). Also called Antarctic Continent. * * * Antarctica Introduction Antarctica Background:… …   Universalium

  • Ursell number — In fluid dynamics, the Ursell number indicates the nonlinearity of long gravity surface waves on a fluid layer. This dimensionless parameter is named after Fritz Ursell, who discussed its significance in 1953. [cite journal | first=F |… …   Wikipedia

  • glacier — glaciered, adj. /glay sheuhr/, n. an extended mass of ice formed from snow falling and accumulating over the years and moving very slowly, either descending from high mountains, as in valley glaciers, or moving outward from centers of… …   Universalium

  • Radiative forcing — In climate science, radiative forcing is generally defined as the change in net irradiance between different layers of the atmosphere. Typically, radiative forcing is quantified at the tropopause in units of watts per square meter. A positive… …   Wikipedia

  • Forcage radiatif — Forçage radiatif En climatologie, le forçage radiatif est approximativement défini comme la différence entre l énergie radiative reçue et l énergie radiative émise par un système climatique donné. Un forçage radiatif positif tend à réchauffer le… …   Wikipédia en Français

  • Forçage Radiatif — En climatologie, le forçage radiatif est approximativement défini comme la différence entre l énergie radiative reçue et l énergie radiative émise par un système climatique donné. Un forçage radiatif positif tend à réchauffer le système (plus d… …   Wikipédia en Français

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