An instrument which measures the intensity of radiation by determining the amount of chemical change( or fluorescence produced by that radiation.

The component of the radiosonde which includes the modulating blocking oscillator and the radiofrequency carrier oscillator.

An instrument for collecting liquid water from the atmosphere.

Wind with a speed between 28 and 33 knots (32 and 38 mph); Beaufort scale number 7.

A record obtained from a meteorograph. A chart in which meteorological variables are plotted against time.

Downward-facing pyranometer used for measuring reflected solar radiation.

The writing component of a recording instrument.

A line drawn through geographical points where a given seasonal biological event occurs on the same date.

A thermometer which uses a transducing element whose element proper-ties are a function of its thermal state. Common meteorological examples of such thermometers are the resistance thermometer and the thermoelectric thermometer.

Electromagnetic radiation lying within the wavelength interval to which the human eye is sensitive, the spectral interval from approximately 0.4 to 0.7 microns (4000 to 7000 angstroms). Bounded on the short-wavelength end by ultraviolet radiation and on t ...

A measure of the amount of "spin" (or rotation) in the atmosphere.

Solar radiation scattered by particles in the atmosphere.

A type of pressure-plate anemometer in which the plate, restrained by a stiff spring, is held perpendicular to the wind. The wind-activated motion of the plate is measured electrically. The natural frequency of this system can be made high enough so that ...

Reduction of visibility by strong winds blowing across dry ground with little or no vegetation. Visibilities of 1/8 mile or less over a widespread area are criteria for a Blowing Dust Advisory.

A line drawn through geographical points having the same duration of sunshine (or other function of solar radiation) during a given interval of time.

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

Wind with a speed between 56 and 63 knots (64 and 72 mph); Beaufort scale number 11.

The total amount of water transferred to the atmosphere by evapotranspiration.

Emission or transfer of energy in the form of electromagnetic waves or particles.

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