- 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, ...
The ratio of the radiation intensity from an antenna, in a given direction, to the radiation intensity averaged over all directions. The directivity is equal to the antenna gain plus antenna dissipation losses.
Industry:Weather
The albedo of a surface when illuminated from a single direction.
Industry:Weather
Solar radiation that has not been scattered or absorbed. In practice, solar radiation that has been scattered through only a few degrees, characteristic of the diffraction peak of the scattering function, is unavoidably included in the operational measurement of direct solar radiation by a pyrheliometer. Compare diffuse sky radiation, global radiation.
Industry:Weather
Linear proportional constant from Darcy's law that is specific to the direction of flow, that is, hydraulic conductivity that depends on direction of flow; of interest for anisotropic porous materials. See Darcian velocity.
Industry:Weather
A measure of the amount of wave energy traveling in different directions in a random sea. See also angular spreading.
Industry:Weather
An instrument consisting of two orthogonal magnetic loop antennas and associated electronics for the purpose of detecting the azimuth to a cloud-to-ground lightning stroke.
Industry:Weather
A gravitational solar tide or lunar tide in the ocean or atmosphere that is in phase with the apparent motions of the attracting body, and consequently has its local maxima directly under the tide-producing body and on the opposite side of the earth. A gravitational tide that is in opposite phase to the apparent motions of the sun or moon is called a reversed tide. See tide-producing force.
Industry:Weather
Runoff caused by and directly following a rainfall or snowmelt event; it forms the major part of the flood hydrograph and excludes base flow.
Industry:Weather
Numerical simulation of fluid motions, like turbulent or transitional turbulent flows using the exact governing equations (e.g., Navier–Stokes equations), without any parameterizations. See also large eddy simulation, very large eddy simulation.
Industry:Weather
That part of the flood hydrograph that represents the fastest response to rainfall and that is distinct from the base flow.
Industry:Weather
