A subtle, diumal component of the wind velocity leading to a diumal shift of the wind or turning of the wind with the sun, produced bv the east-to-west progression of daytime surface heating.

A liquid-in-metal thermometer in which mercury is enclosed in a steel envelope. The change in internal pressure caused by the temperature variation is measured by a Bourdon tube which is connected to the mercury by a capillary tube. This instrument is hig ...

An instrument for photographing the corona and prominences of the sun at times other than at solar eclipse.

American Standard Code for Information Interchange. A standard code used to represent data using 8 bits (7 data bits and I parity bit) per character.

A device attached to a meteorological instrument to provide ventilation; usually a suction fan.

The process by which events in the real world are translated into machine-readable signals.

A recording anemometer.

In folklore, a name for rain.

A definite portion of a stream channel, commonly taken between two gauging stations, but may be taken between any two specified points.

A class of instruments employed to determine the electric potential at a point in the atmosphere, and ultimately the atmospheric electric field.

A clockwise change in wind direction. Veering winds with height are indicative of warm air advection (WAA).

An instrument for the measurement of both solar and terrestrial radiation.

An instrument for recording ocean waves. Most recorders are designed for recording wind waves, that is waves of periods up to about 25 seconds, but some are designed to record waves of longer periods such as tsunamis or tides.

In the direction from which the wind is blowing.

Central Processing Unit. The part of a computer which controls and directs all functions.

Same as ceiling light.

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

The record obtained from a bolometer.

A buoyant balloon kept from rising freely by means of a line secured to a point on the ground, as opposed to a free balloon. See kytoon.

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.