Meteorology: Random Listings RSS

The part of a measuring instrument which responds directly to changes in the environment.

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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.

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

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The intensity (flux per unit solid angle) of visible radiation weighted to take into account the variable response of the human eye as a function of the wavelength of light. Usually expressed in candles.

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Frozen or partly frozen rain.

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Very generally, any moving- stream of air. It has no particular technical connotation.

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

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

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A hydrometeor consisting of a visible aggregate of minute water and/or ice particles in the atmosphere above the earth's surface. Cloud differs from fog only in that the latter is, by definition, in contact with the earth's surface.

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A buoyant balloon kept from rising freely by means of a line secured to a point on the ground, as opposed to a free balloon. See kytoon.

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Same as parhelion.

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A hygrometer in which the sensitive element is a strand or strands of human hair, the length of which is a function of the relative humidity of the air.

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Same as Aeolian.

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A hygrometer in which the rotation of the hygrometric element is a function of humidity.

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The average temperature of the air as indicated by a properly exposed thermometer for a given time period, usually a day, a month, or a year.

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A component of the wind (often using Cartesian coordinates. i.e. X and Y wind vectors). Also, an arrow representing wind velocity, drawn to point in the direction of the wind and with a length proportional to wind speed.

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Old snow that has become granular and compacted as a result of melting and refreezing.

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The direction toward which the wind is blowing; with the wind.

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Wind with a speed between 17 and 21 knots (19 and 24 mph); Beaufort scale number 5.

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An instrument used for measuring the specific gravity of a liquid.

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