An instrument which automatically records the measurement of two or more meteorological elements.

A self-recording psychrometer.

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 ...

Same as constant-level balloon.

The difference between downward and upward (total) radiation; net flux of all radiation.

Upwarddirected solar radiation, reflected by the earth's surface and the atmosphere.

The portion of the strearnflow during any month or year derived from precipitation in previous months or years.

Wind with a speed between 48 and 55 knots (55 and 63 mph), Beaufort scale number 10.

bucket rain gauge-A rain gauge where the precipitation collected by the receiver empties into one side of a chamber which is partioned transversely at its center and is balanced bistably upon a horizontal axis. When a predetermined amount of water has bee ...

Anemometer which generates an electrical contact output with a frequency proportional to wind speed.

Same as instrument shelter.

Same as ceiling light.

The process by which water in plants is transferred as water vapor to the atmosphere. Also, the amount of water so transferred.

A unit of energy equal to 101 ergs or to 0.2389 calories.

An instrument for the measurement of the net flux of downward and upward total (solar and terrestrial) radiation through a horizontal surface.

Anemometer which measures wind speed by the speed of rotation of 3 or 4 hemispherical or conical cups, each fixed to the end of a horizontal arm projecting from a vertical axis. See condenser-discharge anemometer, contact anemometer. Compare to bridled-cu ...

A device that combines several separate communications signals into one and outputs them on a single line.

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

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 instrument used to measure changes in the level of the water in an evaporation pan. The gauge is normally placed in a Stillwell and adjusted so that the point of the hook just breaks the water surface. The change in water level is read on the attached ...