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hydrometeor

Overview page. Subjects: Physics — Meteorology and Climatology.

Any product of the condensation of the water vapour in the atmosphere, which can occur either in the atmosphere or on the surface of the earth. Hydrometeors can consist of solid or liquid...

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hypsometer

Overview page. Subjects: Meteorology and Climatology — Physics.

A device for calibrating thermometers at the boiling point of water. As the boiling point depends on the atmospheric pressure, which in turn depends on the height above sea level, the...

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isodynamic line

Overview page. Subjects: Physics — Meteorology and Climatology.

A line on a map or chart joining points or places at which the total strengths of the earth's magnetic field are equal (see geomagnetism).

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Pitot tube

Overview page. Subjects: Physics — Meteorology and Climatology.

A device for measuring the speed of a fluid. It consists of two tubes, one with an opening facing the moving fluid and the other with an opening at 90° to the direction of the flow. The two...

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Réaumur scale

Overview page. Subjects: Meteorology and Climatology — Physics.

A temperature scale in which the melting point of ice is taken as 0°R and the boiling point of water as 80°R. It was devised by René Antoine Réaumur (1683–1757).

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skip distance

Overview page. Subjects: Physics — Meteorology and Climatology.

The minimum distance from the transmitter of a radio wave at which reception is possible by means of a sky wave (see radio transmission). If a radio wave strikes the ionosphere at a small...

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thermopile

Overview page. Subjects: Physics — Meteorology and Climatology.

Instrument for the measurement of direct and diffuse short-wave radiation, which utilizes a bank of thermocouples covered by a glass or other transparent dome.

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