Meteorology: All Listings RSS

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A basic equation in daytime visual range theory, relating the apparent luminance of a distant black object, the apparent luminance of the background sky above the horizon, and the extinction coefficient of the atmosphere, or the air layer near the ground. ...

Category:Meteorology

Growth of a cloud or precipitation particle by the collision and union of a frozen particle with a super-cooled water drop.

Category:Meteorology

A type of hygrometer which measures the water vapor content of the atmosphere by means of the absorption of vapor by a hygroscopic chemical.

Category:Meteorology

A temperature scale based on absolute zero. Same as Kelvin temperature scale.

Category:Meteorology

In a system of moist air, the ratio of the mass of water vapor to the total volume of the system. Usually expressed as grams per cubic meter (g/m3).

Category:Meteorology

A recording hair hygrometer.

Category:Meteorology

An instrument whose calibration can be determined by means of simple physical measurements on the instrument. Compare to secondary instrument.

Category:Meteorology

A thermodynamic change of state in a system in which there is no transfer of heat or mass across the boundaries of the system. In an adiabatic process, compression always results in warming, expansion in cooling. Compare to diabatic process.

Category:Meteorology

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

Category:Meteorology

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

Category:Meteorology

The process by which one object becomes adhered to another by the binding action of ice.

Category:Meteorology

Temperature based on an absolute scale.

Category:Meteorology

The degree of conformity of an indicated value to an accepted standard value, or ideal value. See accuracy rating, measured accuracy.

Category:Meteorology

The atmospheric pressure at the level of the barometer. May or may not be the same as station pressure.

Category:Meteorology

The process in which incident radiation is retained by a substance. A further process always results from absorption.

Category:Meteorology

The volume of water required to cover one acre to a depth of one foot: 43,560 cubic feet.

Category:Meteorology

A number of quantity defining a limit that errors will not exceed when a device is used under specified operating conditions. Accuracy rating can be expressed in a number of forms, i.e. in terms of the measured variable (+/- 1 C), percent of span (+/-0.5% ...

Category:Meteorology

Pertaining to the action or effect of the wind. Derived from the name of the Greek god of the winds, Aeolus.

Category:Meteorology

An anemometer utilizing the principle that the pitch of the aeolian tones generated by air moving past an obstacle is a function of the speed of the air. Largely a curiosity and has been put to no practical application in modem meteorology.

Category:Meteorology

The transducer's output when the maximum sensed value is applied to the transducer's input. For example, the F.S. output of a 4-20 mA transmitter is 20 mA, whereas its span is only 16mA.

Category:Meteorology