The record made by a hygrograph.

The distance or length of flow of the air past a point during a given interval of time.

In radiometry, a measure of the intrinsic radiant intensity emitted by a radiator in a given direction.

In general, the transformation of data from a "raw" form to some useable form. In meteorology, this often refers to the conversion of the observed value of an element to the value which it would theoretically have at some selected or standard level. The m ...

A very sensitive electrostatic electrometer for measuring small potential differences.

An anemometer which measures wind speed in terms of the drag which the wind exerts on a solid body. See bridled-cup anemometer, normal-plate anemometer, pendulum anemometer.

Same as dropsonde.

Precipitation of very small, white opaque particles of ice, fairly flat or elongated, with diameters less than 1 mm. The solid equivalent of drizzle.

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

The ratios, to the mean wind speed, of the average magnitudes of the component fluctuations of the wind along three mutually perpendicular axes.

The maximum positive and negative deviation observed in testing a device under specified conditions and by a specified procedure. It is usually measured as an inaccuracy and expressed as accuracy, typically in terms of the measured variable, percent of sp ...

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

An instrument for measuring radiant energy. It consists of an ether differential thermometer with blackened bulbs. One of the bulbs is exposed to the unknown radiation and the other to a black body source whose temperature can be varied. Equality of radia ...

An Instrument used to determine dew point.

Generally, the relative states of inflow, outflow, and storage of moisture over a given area of earth's surface.

Precipitation of white, opaque, spherical or conical ice particles that are crisp and easily crushed and that have diameters of 2 to 5 mm.

A fixed-length group of bits representing the large data element handled as a unit by a computer. Word length is determined by the capacity of the CPU registers.

Radiation with wavelengths less than 4 microns.

A type of pressure-tube anemometer, named after the inventor.

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