- 行业: Weather
- Number of terms: 60695
- Number of blossaries: 0
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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 natural movement of groundwater from one river basin to another (sometimes distant) basin.
Industry:Weather
The nonflight equipment necessary to track a radiosonde, receive its telemetry signal, convert the signal into meteorological data, process the data into calculated parameters and graphical displays, and transmit coded messages representing the upper-air radiosonde observation, or raob.
Industry:Weather
The minimum separation between two targets that permits them to be distinguished by a radar. The minimum separation in range along a given direction from the radar is one-half the transmitted pulse length. The minimum angular separation at a given range is approximately the 3-dB beamwidth of the radar. These minimum dimensions determine the radar resolution volume. Targets within the volume are not resolved and appear to be merged into a single target on a radar display. Radar resolution is usually of more concern for point targets than for weather echoes, because the latter are beam-filling targets that are considerably larger than the resolution volume. Compare pulse volume.
Industry:Weather
The northern front of the Antarctic Circumpolar Current that separates the polar frontal zone in the south from the subantarctic zone in the north. It is characterized by sea surface temperatures near 7°–9°C and a salinity minimum of 33. 8– 34. 0 psu produced by high rainfall.
Industry:Weather
The motion of a disturbance (usually, but not necessarily, assumed infinitesimal), as opposed to the motion of the steady state of the system on which the perturbation is superimposed.
Industry:Weather
The moment of the relative momentum about a point. See angular momentum.
Industry:Weather
The mode of data gathering by GOES whereby an image is produced at intervals of 1–10 minutes instead of the normal intervals of 15 (formerly 30) minutes. Rapid interval scanning is used primarily for research and to observe rapidly developing severe weather, tropical storm, or flash flood situations.
Industry:Weather
The maximum discharge rate that a spillway has been designed to convey.
Industry:Weather
The measurement of the visual aspect of radiant energy (light). As such, it is distinguished from radiometry in that photometry takes into account the varying sensitivity of the eye to different wavelengths of light.
Industry:Weather
