- 行业: 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, ...
Any equation governing the behavior of a perturbation. This may or may not be a linearized differential equation.
Industry:Weather
Any device or instrument for determining salinity, especially one based on electrical conductivity methods.
Industry:Weather
Any equation governing a system that contains a time derivative of a quantity and therefore can be used to determine the value of that quantity at a later time when the other terms in the equation are known (e.g., vorticity equation). Compare diagnostic equation; See'' also'' regression.
Industry:Weather
Any departure introduced into an assumed steady state of a system. The magnitude is often assumed to be small so that product terms in the dependent variables may be neglected; the term “perturbation” is therefore sometimes used as synonymous with “small perturbation. ” The perturbation may be concentrated at a point or in a finite volume of space; it may be a wave (sine or cosine function); in the case of a rotating system, it may be symmetric about the axis of rotation; or it may be a displacement by the parcel method. The mathematical work in an instability problem may be facilitated by the perturbation technique, whether or not the equations are linearized. In synoptic meteorology, this term is used for any departure from zonal flow within the major zonal currents of the atmosphere. It is especially applied to the wavelike disturbances within the tropical easterlies. See easterly wave; Compare disturbance.
Industry:Weather
Any coordinate system that is moving with respect to an inertial coordinate system. In practice, atmospheric motion is always referred to a relative system fixed to the surface of the earth. Referred to a relative system, various apparent forces arise in Newton's laws owing to motion of the system. See, for example, centrifugal force, Coriolis force.
Industry:Weather
Any cloud from which snow falls; a popular term having no technical connotation.
Industry:Weather
Any cloud from which rain falls; a popular term having no technical denotation. In older cloud classification systems, any cloud from which rain or snow fell was called nimbus.
Industry:Weather
Any chart or diagram providing a graphical solution to the flux integrals arising in problems of atmospheric infrared radiative transfer. Radiation charts have been superseded by computer models.
Industry:Weather
Angle measured at the earth's surface between the sun and the zenith.
Industry:Weather
