- Industry: 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, ...
The vector '''k''' in the solution of a wave equation expressed as the product of a time- varying function and ''A'' exp(''i'''''k''' • '''x'''), where '''x''' is the position vector and ''A'' is constant in space and time. The wave vector may, in general, be complex, and its real and imaginary parts need not be parallel, in which instance the wave is inhomogeneous.
Industry:Weather
The proportionality constant between the volumetric flux of water and the hydraulic gradient in a porous medium for cases of water content less than saturation. Often expressed as a function of soil-water pressure head and/or water content, it includes the effects of the water-filled pore structure and the viscosity and density of the water.
Industry:Weather
A smoothed composite of the recessions of several observed hydrographs, drawn to represent the characteristic time graph of decreasing total runoff for a drainage area after passage of a peak flow. Curves of this type, designed to characterize the nature of a drainage area, may be constructed as a plot of flow (stage of discharge) versus time, or as a plot of flow versus flow at some fixed later interval; also, separate recession curves may be derived for surface runoff, groundwater runoff, and even for interflow.
Industry:Weather
Variable width of rings produced by seasonal growth as observed in the horizontal cross section cut from a tree trunk. The number of rings observed corresponds to the age of the tree. Tree rings are used to date past climate events in dendrochronology work.
Industry:Weather
The ratio of the speeds of a chemical reaction at two temperatures differing by 10°C. It varies with different materials but is generally near 2 (i.e., the reaction rate doubles for each rise of temperature by 10°C), especially for reactions involving water vapor. This value may be connected with the fact that equilibrium vapor pressure nearly (but not quite) doubles for a rise of temperature by 10°C. The temperature coefficient for bacterial action is also near 2.
Industry:Weather
The steady state of a system before perturbations are introduced.
Industry:Weather
1. The study of atmospherics, especially from a meteorological point of view. This involves techniques of locating and tracking atmospherics sources and evaluating received signals (waveform, frequency, etc. ) in terms of source. 2. Same as atmospherics.
Industry:Weather
The vertical component of the (mathematical) curl of the surface wind stress ∂τ''<sub>y</sub>''/∂''x'' − ∂τ''<sub>x</sub>''/∂''y'' (with ''x'' and ''y'' eastward and northward coordinates, and τ''<sub>x</sub>'', τ''<sub>y</sub>'' the corresponding components of the surface stress). The large-scale, long-term averaged wind stress curl contains the principal information to calculate the wind-driven mass transport.
Industry:Weather
The spreading of waves in space due to differences in their speed and direction, in particular if speed differences arise from differences in frequency. Because dispersion spreads the same waves over a larger area, wave heights decrease through dispersion. See dispersion relationship.
Industry:Weather
Two counterrotating tropical cyclones straddling the equator. These occur in the tropical western Pacific and Indian Oceans, and are usually accompanied by westerly wind bursts on and near the equator.
Industry:Weather
