Thermometer used for measuring the highest temperature attained during a given interval of time, for example, a day.

Solar and terrestrial radiation directed upward (away From the earth's surface); outgoing radiation.

Cathode Ray Tube. A display element, consisting of a vacuum tube and screen, used with computers.

The correction applied to an instrument to account for the effect of temperature upon its response characteristics.

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

The value of atmospheric pressure to which the scale of a pressure altimeter is set so as to indicate airport elevation. The altimeter setting is included as part of an aviation weather observation.

An instrument whose calibration is determined by comparison with an absolute instrument.

The rising of cold water from the deeper areas of the ocean to the surface. This phenomena often occurs along the California coast during the spring and summer.

An instrument, for the recording of two or more meteorological parameters, in which the ventilation is provided by a suction fan.

Clouds which cover between 6/10 and 9/10 of the sky. See Sky Terminology.

General term for an instrument which records the vertical electric current in the atmosphere.

A barometer which measures atmospheric pressure using one or a series of aneroid capsules. Also called holosteric barometer.

A numbering system using a base number of 2 and having only two digits: 0 and 1. The fundamental system of representing information with electrical pulses.

Complementary Metal-Oxide Semiconductor. A method of making silicon chips that results in low power consumption by the circuits.

See calorie.

An instrument resulting from the combination of a thermograph and a hygrograph and furnishing, on the same chart, simultaneous time recording of ambient temperature and humidity.

An automatic, recording cloud height indicator.

The maximum difference in output for any given input (within the specified range) when the value is approached first with increasing, and then with decreasing, input signals. Caused by energy absorption in the elements of the measuring instrument. Usually ...

A temperature scale with the ice point at 273 degrees and boiling point of water at 373 degrees. It is intended to approximate the Kelvin temperature scale with sufficient accuracy for many sciences, notably meteorology.

A balloon designed to float at a constant pressure level. This may be accomplished by a pressure valve which controls the release of ballast so as to maintain flight above a selected pressure level until the supply of ballast is exhausted. See Moby Dick b ...