The record obtained from a bolometer.

The volume of liquid water evaporated per unit area in unit time. usually measured as the depth of liquid water lost per unit time from the whole area.

A unit of pressure which directly expresses the force exerted by the atmosphere. Equal to 1000 dynes/cm2 or 100 pascals.

The total area drained by a river and its tributaries. Same as watershed.

The unit of acceleration in the centimeter-gram-second system of units, equal to one cm per sec2. Commonly used in gravimetry.

Name given to the unit of pressure in the International System of Units (SI). Equal to 1 newton/meter2 or 0.01 millibar.

Same as ceiling light.

The record made by a hygrograph.

The measuring, transmitting, receiving, and indicating apparatus for obtaining the value of a quantity at a distance.

Same as luminous intensity.

Same as wave pole.

The source of illumination for an antenna reflector. Also called antenna feed.

A device for computing certain psychrometric data, usually the dew point and the relative humidity, from known values of the dry-bulb and wet-bulb temperatures and the atmospheric pressure. One type is the circular slide-rule form and, like the psychromet ...

A small, limited-capacity central processing unit contained entirely on one semiconductor chip.

Wind with a speed between 41 and 47 knots (47 and 54 mph); Beaufort scale number 9.

A special type of radar target, usually a comer reflector, tied beneath a free balloon and designed to be an efficient reflector of radio energy.

An anemometer utilizing the principle that the pitch of the aeolian tones generated by air moving past an obstacle is a function of the speed of the air. Largely a curiosity and has been put to no practical application in modem meteorology.

A set of rules or conventions used to standardize data transfer between devices.

A counterclockwise change in wind direction. Backing winds with height are indicative of cold air advection (CAA).

A hygrometer which determines the amount of precipitable moisture in a given region of the atmosphere by measuring attenuation of radiant energy caused by the absorption bands of water vapor.