- 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, ...
An independent variable, or predictor, in a regression equation. Also, a secondary variable that can affect the relationship between the dependent variable and independent variables of primary interest in a regression equation.
Industry:Weather
A line of constant elevation above a certain reference level (usually mean sea level) on a previously defined surface, which may be the earth's surface, a constant-pressure surface, an isentropic surface, etc. A contour line of a given value is the intersection of the surface in question with the constant- height surface of the same elevation as the value of the contour line. In meteorology, a contour line frequently refers to a line of constant height on a constant-pressure chart. Compare isobar.
Industry:Weather
In meteorology, a surface of constant geometric or geopotential altitude measured with respect to mean sea level. Compare constant-pressure surface.
Industry:Weather
A line of constant elevation above a certain reference level (usually mean sea level) on a previously defined surface, which may be the earth's surface, a constant-pressure surface, an isentropic surface, etc. A contour line of a given value is the intersection of the surface in question with the constant- height surface of the same elevation as the value of the contour line. In meteorology, a contour line frequently refers to a line of constant height on a constant-pressure chart. Compare isobar.
Industry:Weather
A synoptic chart for any surface of constant geometric altitude above mean sea level (a constant- height surface), usually containing plotted data and analyses of the distribution of such variables as pressure, wind, temperature, and humidity at that altitude. A commonly analyzed constant-height chart is the surface chart (or “sea level chart”). All of the upper-air charts are considered constant-pressure charts.
Industry:Weather
In meteorology, a surface of constant geometric or geopotential altitude measured with respect to mean sea level. Compare constant-pressure surface.
Industry:Weather
A synoptic chart for any surface of constant geometric altitude above mean sea level (a constant- height surface), usually containing plotted data and analyses of the distribution of such variables as pressure, wind, temperature, and humidity at that altitude. A commonly analyzed constant-height chart is the surface chart (or “sea level chart”). All of the upper-air charts are considered constant-pressure charts.
Industry:Weather
A depression, roughly conical in shape, formed in a water table or piezometric surface by the withdrawal of water from a well.
Industry:Weather
A depression, roughly conical in shape, formed in a water table or piezometric surface by the withdrawal of water from a well.
Industry:Weather
An apparent force on moving particles in a noninertial coordinate system, that is, the Coriolis acceleration as seen in this (relative) system. Such a force is required if Newton's laws are to be applied in this system. In meteorology the Coriolis force per unit mass arises solely from the earth's rotation, and is equal to −2Ω × u, where Ω is the angular velocity of the earth and u is the (relative) velocity of the particle. Thus the Coriolis force acts as a deflecting force, normal to the velocity, to the right of the motion in the Northern Hemisphere and to the left in the Southern Hemisphere. It cannot alter the speed of the particle. The three components toward east, north, and zenith are, respectively, 2Ω (v sinφ − w cosφ), −2Ωu sinφ, and 2Ωu cosφ, where u, v, w are the component velocities and φ the latitude. Since the Coriolis force is in effect proportional to the speed, its importance in any given atmospheric motion may be judged from the representative speed and duration of the motion. See inertial force.
Industry:Weather
