Meteorology

Meteorology

A database of terms pertaining to the scientific study of the atmosphere.

Contributors in Meteorology

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 characterised 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 ...

Lux

Weather; Meteorology

A photometric unit of illuminance or illumination equal to one lumen per square meter. A level of illumination between 200 and 1000 lux is generally considered to be adequate for homes and offices. ...

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 vapour pressure with respect to a flat surface, and the radius of ...

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. ...