A box-like structure designed to protect certain meteorological instruments from exposure to direct sunlight, precipitation, and condensation, while at the same time providing adequate ventilation. Instrument shelters are painted white, have louvered side ...

Precipitation composed of liquid water drops more than 0.5 mm in diameter, failing in relatively straight, but not necessarily vertical, paths. Compare to drizzle.

An instrument of the aspiration condenser type which measures the concentration and mobility of small ions.

Hygrometer in which the dew (frost) point is determined by observing the temperature of an artificially cooled surface at the moment at which dew (frost) first appears on it.

The height of the cloud base above the local terrain.

Same as dropsonde.

An instrument which determines the black-body temperature of a substance by measuring its thermal radiation.

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

An instrument used to measure and record earthquake vibrations and other earth tremors.

An instrument used for the measurement of the reflecting, power (the albedo) of a surface. A pyranometer adapted for the measurement of radiation reflected from the earth's surface is sometimes employed as an albedometer.

A thermograph in which ventilation is provided by a suction fan.

The maximum rate at which precipitation can pass through the surface into the soil, for a given soil in a given condition.

In folklore, a name for wind.

The combined processes by which water is transferred from the earth's surface to the atmosphere: evaporation of liquid or solid water plus transpiration from plants.

Contraction for radiosonde observation.

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

A hypothetical temperature characterized by a complete absence of heat and defined as 0 K, -273.15 C, or -459.67 F.

The programs and instructions which direct a computer.

A numbering system using a base number of 16 and including the ten decimal digits (0 to 9) along with six alpha digits (A to F). Thus. a digit is available to represent each of the possible values of a 4-bit binary digit.

meter-An instrument for measuring the transmissivity of the atmosphere; a type of transmissometer. It consists of a constant- intensity collimated light source located at a suitable distance from a photoelectric cell. Variation in the turbidity of the atm ...