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Meteorology
A database of terms pertaining to the scientific study of the atmosphere.
Industry: Weather
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Meteorology
Köhler equation
Weather; Meteorology
A relationship between the radius of a cloud droplet grown on a hygroscopic nucleus of a given dry mass, which decreases the vapor pressure with respect to a flat surface, and the radius of curvature ...
loop rating
Weather; Meteorology
A rating curve that has higher values of discharge for a certain stage when the river is rising than it does when the river is falling. Occasionally, the stage discharge curve describes a loop with ...
lightning echo
Weather; Meteorology
A radar echo from lightning. Lightning echoes are explained by the scattering of radar waves by the high concentration of free electrons created in the narrow channel of a lightning discharge. ...
Langmuir probe
Weather; Meteorology
A probe used to measure the electron temperature of ionized plasmas. Langmuir probes mounted on spacecraft are often used to measure the electron temperature of the earth's ionosphere.
klystron
Weather; Meteorology
A power amplifier tube used to amplify weak microwave energy (provided by a radio- frequency exciter) to a high power level for a radar transmitter. A klystron is characterized by high power, large ...
large eddy model
Weather; Meteorology
A numerical model with an averaging volume sufficiently small that the eddies contained entirely within it (i.e., the unresolved eddies) are of inertial-range scales and smaller. The larger ...
level of concern
Weather; Meteorology
A pollutant concentration level (specific to the averaging time being considered) associated with a condition of exposure, often for sensitive population groups. Concentrations above the level of ...