- 行业: Weather
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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, ...
In meteorology, loosely used for any influence upon the direction of movement of an atmospheric disturbance exerted by another aspect of the state of the atmosphere. Thus, it might be said that a surface pressure system tends to be steered by isotherms, contour lines, streamlines aloft, warm-sector isobars, the orientation of a warm front, etc. Nearly always this principle is applied to the relationship between the velocity of a cyclone and the velocity of the basic flow in which it is embedded.
Industry:Weather
In meteorology, any chart or map on which data and analyses are presented that describe the state of the atmosphere over a large area at a given moment in time. The possible variety of such charts is almost limitless, but in meteorological history there has been a more or less standard set of synoptic charts, including surface charts and the constant- pressure charts of the upper air. Other synoptic charts include isentropic charts and constant- height charts, both used for upper-air analysis. There are a number of auxiliary and special- purpose synoptic charts, including thickness charts, tropopause charts, stability charts, change charts, continuity charts, etc. , that have useful applications for preparing forecasts of weather events at various locations. See'' also'' mean chart, prognostic chart, cross section, profile.
Industry:Weather
In meteorology, an atmospheric wave that moves in a direction opposite to that of the flow in which the wave is embedded. Retrogression of a particular wave on daily charts is rarely seen, but it is frequently observed on five-day or monthly mean charts.
Industry:Weather
In meteorology, a point in a time series an equal distance on either side of which the rate of change of the element has the same magnitude but opposite sign.
Industry:Weather
In meteorology, a line or narrow zone across which there is an abrupt change in the horizontal wind component parallel to this line; a line of maximum horizontal wind shear.
Industry:Weather
In meteorology, a line along which a discontinuity in the wind speed occurs. Usually, but not always, the wind speed is strongest upstream from the surge line. Sometimes it is also accompanied by a change in wind direction.
Industry:Weather
In meteorology, a graph of the value of a scalar quantity versus a horizontal, vertical, or timescale. It usually refers to a vertical representation. Compare contour, cross section, time section.
Industry:Weather
In hydrology, the equation of continuity applied to unsteady flow. It states that the fluid inflow to a given space during an interval of time minus the outflow during the same interval is equal to the change in storage. It is applied in hydrology to the routing of floods through a reservoir or a reach of a stream. The moisture-continuity equation applied to the atmosphere is a modification of this.
Industry:Weather
