The total of all deviations of a transducer's output from a specified straight line in a constant environment.

A measure of the degree to which the weather or climate of a region is favorable to the process of evaporation. Usually considered to be the rate of evaporation. under existing atmospheric conditions, from a surface of water which is chemically pure and h ...

A pyrheliometer of the bimetallic type used to measure the intensity of direct solar radiation.

Contraction for pilot balloon observation.

The atmospheric pressure at mean sea level either directly measured by stations at sea level or empirically determined from the station pressure and temperature by stations not at sea level. Used as a common reference for analyses of surface pressure patt ...

A recording hair hygrometer.

An accumulation of granular ice tufts on the windward sides of exposed objects that is formed from supercooled fog or cloud and built out directly against the wind.

The center of an area of high pressure, usually accompanied by anticyclonic and outward wind flow. Also known as an anticyclone.

A warm, dry wind on the lee side of a mountain range, the warmth and dryness due to adiabatic compression upon descent.

An instrument for measuring temperature by utilizing the variation of the physical properties of substances according to their thermal states. Thermometers may be classified into types according to their construction; deformation thermometer, electrical t ...

Same as contact anemometer.

The record made by a hygrograph.

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

A radiosonde whose carrier wave is modulated by audio-frequency signals whose frequency is controlled by the sensing elements of the instrument.

Same as water year.

Interational thermometric scale on which the freezing point of water equals 0

An instrument for measuring differences in electric potential.

A weakly colored lunar halo identical in form and optical origin to the solar parhelion.

in folklore, a name for fire.

A clock-driven device for recording the time of occurrence of an event or the time interval between the occurrence of events.