The difference between the outgoing infrared terrestrial radiation of the earth's surface and the downcoming infrared counterradiation from the atmosphere.

Either of two colored luminous spots that appear at points 22

A mercury barometer which measures atmospheric pressure by weighing the mercury in the column or cistern.

The range of operating conditions of a device within which operating influences are negligible. The range is usually narrow. Reference operating conditions are the conditions under which reference performance is stated and the base from which the values o ...

A weakly colored lunar halo identical in form and optical origin to the solar parhelion.

Contraction for radiosonde observation.

A precipitation gauge consisting of a receiver in the shape of a funnel which empties into a bucket mounted upon a weighing mechanism. The weight of the catch is recorded as inches of precipitation.

The actual time during which physical events take place.

A general term for instruments which sample atmospheric suspensoids by impaction. Same as impactometer.

A plastic molding component formed by the reaction of phenol and formaldehyde. It can be heavily reinforced or "filled" with glass fibers or other materials. Phenolics are known for their high impact strength, excellent wear characteristics, and dimension ...

Wind with a speed between 22 and 27 knots (25 and 31 mph); Beaufort scale number 6.

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

Balance of the water resources of a region, comparing precipitation and inflow with outflow, evaporation, and accumulation.

An instrument for the measurement of the radon content of the atmosphere.

A sounding balloon which, when operationally inflated, resembles an inverted teardrop.

A hydrostatic principle that pressure supplied to an enclosed fluid is transmitted undiminished to every portion of the fluid and to the walls of the containing vessel.

The measurement and computation of wind speeds and directions at various levels above the surface of the earth. Methods include pilot balloon observations, rabals, rawin or rawinsonde observations, radar tracking, or acoustic sounding.

Programs or instructions which are stored in readonly memory.

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

A pointed device which indicates the amount of resistance encountered when it is forced into a material such as snow or soil. See ram penetrometer.