The upper surface of a column of liquid.

The array of indicating marks and figure in relation to which the position of an index is observed, i.e. a scale plate on a recorder.

Occupational Safety and Health Administration. A regulatory office of the U.S. Department of Labor.

The transmission of data collected at a remote location over communications channels to a central station.

Integrated Flood Observing and Warning System. National Weather Service flood warning program.

The water volume within a specified portion of a stream channel.

Sir Napier Shaw's name for the approximate absolute temperature scale,

Not a linear function of the relevant variables.

Facing away from the wind.

In nautical terminology, a contraction for "weather glass" (a mercury barometer).

An instrument used to measure and record earthquake vibrations and other earth tremors.

Any meteorological instrument, such as a radiosonde, in which the recording apparatus is located at some distance from the measuring apparatus.

Emission or transfer of energy in the form of electromagnetic waves or particles.

That part of an audio-modulated radiosonde consisting of the baroswitch, the sensing elements, the reference elements, and the relay.

The lowest level at which the wind becomes geostrophic in the theory of the Ekman spiral. Also called gradient wind level.

The process by which small particles suspended in a medium of a different refractive index diffuse a portion of the incident radiation in all directions. In scattering no energy transformation results, only a change in the spatial distribution of the radi ...

Routine broadcast of meteorological information for aircraft in flight.

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.

Random Access Memory. The memory of a computer which can be read and written into at any location without passing through preceding locations.

The interval between the lower and upper measuring limits of an instrument, i.e. a thermometer with a range of -35 to 50