An instrument developed by K. Angstrom for measuring the effective terrestrial radiation. It consists of four manganin strips, of which two are blackened and two are polished. The blackened strips are allowed to radiate to the atmosphere while the polishe ...

In general. the severe wind of an intense tropical cyclone (hurricane or typhoon). The term has no further technical connotation, but, unfortunately, is easily conftlsed with the strictly defined hurricane-force wind,

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

An instrument for collecting liquid water from the atmosphere.

A radar which is used to obtain the azimuth elevation, and slant range of an airborne target.

Same as recording rain gauge.

The depth below which the ground is saturated with water. No water table exists if the ground water is confined by an overlying impermeable stratum, as in the case of artesian ground water.

A continuous-recording barometer.

An Instrument used to determine dew point.

Same as water year.

A clock-driven instrument mounting which automatically and continuously points in the direction of the sun. It is used with a pyrheliometera,hen continuous direct solar radiation measurements are required.

General name for an instrument which measures the evaporation rate of water into the atmosphere. See clay atmometer, evaporation pan, evapotranspirometer, Livingston sphere, Piche evaporimeter, radio atmometer.

A mercury barometer designed for use aboard ship. The instrument is of the fixed-cistern type (see Kew barometer). The mercury tube is constructed with a wide bore for its upper portion and with a capillary bore for its lower portion. This is done to incr ...

Same as balloon cover.

The elevation of the water surface in a stream as measured by a river gauge with reference to some arbitrarily selected zero datum.

Generic term for rapid variations in apparent position, brightness, or color of a distant luminous. object viewed through the atmosphere.

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

An instrument which measures the rate of evapotranspiration. It consists of a vegetation soil tank so designed that all water added to the tank and all water left after evapotranspiration can be measured.

An instrument which measures evaporation by measuring the loss of water from a burette reservoir through a ceramic disc.

Diffuse solar radiation which has the same intensity in all directions.