Wind with a speed between 34 and 40 knots (39 and 46 mph); Beaufort scale number 8.

Any horizontal wind velocity tangent to the contour line of a constant pressure surface (or to the isobar of a geopotential surface) at the point in question.

Apparatus designed to measure and record the size distribution of raindrops as they occur in the atmosphere.

An anemometer which measures wind speed by means of the properties of wind-borne sound waves. It operates on the principle that the propagation velocity of a sound wave in a moving medium is equal to the velocity of sound with respect to the medium plus t ...

The transducer of any hygrometer, i.e. that part of a hygrometer that quantitatively "senses" atmospheric water vapor.

A device that allows a terminal or computer at one location to communicate with a terminal or computer at a distant location via wire or phone lines.

The value of the quantity measured, as indicated or otherwise provided by a measuring instrument.

A colorless and odorless gaseous element. The lightest and apparently the most abundant chemical element in the universe. However, it is found only in trace quantities in the observable portion of our atmosphere, only about 0.00005 percent by volume of dr ...

A type of wind vane having a split or V-shaped tail. The apex orients itself to the direction of the wind.

A photoelectric spectrophotometer which is used in the determination of the ozone content of the atmosphere.

Same as atmometer.

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

A hydrometeor consisting of an aggregate of microscopic and more-or-less hygroscopic water droplets suspended in the atmosphere. It reduces visibility to a lesser extent than fog. The relative humidity of mist is often less than 95 percent.

The quantity to be measured (or modulated, or detected, or operated upon) which is received by an instrument. Thus, for a thermometer. temperature is the input quantity.

The algebraic difference between the upper and lower limits of the measuring range of an instrument, i.e. a thermometer with a range of -35 to 50

Name sometimes used in place of pyranometer as a generic term.

A hygrometer based upon the diffusion of water vapor through a porous membrane.

The scientific study of the waters of the earth, especially with relation to the effects of precipitation and evaporation upon the occurrence and character of water in streams, lakes, and on or below the land surface. In terms of the hydrologic cycle, the ...

A system of physical units based upon the use of the meter, the metric ton (106 grams), and the second as elementary quantities of length, mass, and time, respectively.

Erasable Programmable Read Only Memory. Programable read-only memory which can be erased, usually by ultraviolet light, and re-programmed.