Meteorology: Random Listings RSS

A liquid-in-metal thermometer in which mercury is enclosed in a steel envelope. The change in internal pressure caused by the temperature variation is measured by a Bourdon tube which is connected to the mercury by a capillary tube. This instrument is hig ...

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A measure of the intrinsic luminous intensity emitted by a source in a given direction. Luminance is a measure only of light. The comparable term for electromagnetic radiation in general is radiance.

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Dihydrogen oxide, molecular formula H2O.

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A strong wind characterized by a sudden onset, a duration on the order of minutes, and a rather sudden decrease in speed.

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A continuous-recording barometer.

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Any soft, gentle breeze.

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General term for any device that measures precipitation: principally a rain gauge or snow gauge.

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The correctable part of the inaccuracy of an instrument.

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QPF

Quantitative Precipitation Forecast.

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Lowest altitude in the atmosphere over a given location at which the air temperature is 0

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Interational thermometric scale on which the freezing point of water equals 0

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Contraction for radiosonde observation.

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Downward-facing pyranometer used for measuring reflected solar radiation.

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In general. the severe wind of an intense tropical cyclone (hurricane or typhoon). The term has no further technical connotation, but, unfortunately, is easily conftlsed with the strictly defined hurricane-force wind,

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Temperature assumed by an unsaturated air parcel when brought adiabatically to a standard pressure (1,000 mb).

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A hygrometer which includes an arrangement for the time recording of atmospheric humidity.

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Same as humidity strip.

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Difference between the instantaneous wind velocity at a point and the mean wind velocity taken over a given time interval. Also called fluctuation velocity.

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The actual time during which physical events take place.

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An instrument resulting from the combination of a thermograph and a hygrograph and furnishing, on the same chart, simultaneous time recording of ambient temperature and humidity.

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