In general, pertaining to or affording an overall view. In meteorology, this term has become somewhat specialized in referring to the use of meteorological data obtained simultaneously over a wide area for the purpose of obtaining a comprehensive and near ...

Temperarure at which a liquid solidifies under any given set of conditions. It may or may not be the same as the melting point or the more rigidly defined true freezing point or (for water) ice point.

An instrument used for the determination of the electrical conductivity of the atmosphere.

Same as parhelion.

An instrument used to determine atmospheric pressure or elevation by observing the boiling point of water or both liquids. The sensitivity of the hypsometer increases with decreasing pressure, making it more useful for high altitude work.

The difference between the solar radiation directed downward and upward; net flux of solar radiation.

An evaporation pan in which the evaporation is measured from water in a pan floating in a larger body of water.

A type of photoelectric photometer used to measure high-altitude winds on the assumption that stellar scintillation is caused by atmospheric inhomogeneities being carried along by wind near the tropopause level.

The frequency of a carrier wave.

Difference between the instantaneous wind velocity at a point and the mean wind velocity taken over a given time interval. Also called fluctuation velocity.

Same as ombrometer.

A temperature telemeter.

Particle on which the freezing of water occurs.

The distance or length of flow of the air past a point during a given interval of time.

An instrument which automatically determines the size distribution of raindrops.

The process in which incident radiation is retained by a substance. A further process always results from absorption.

Physical equipment used in data processing. Compare to firmware, software.

Abbreviation for the pressure, temperature, and humidity data obtained by a radiosonde observation.

A curve showing the variation of temperature with height in the free air. See lapse rate.

See feed.