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Section T T index 121-129 of 589 terms
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terral—See virazon.
terrenho—(Also spelled tereno.) A cold, dry, land wind of India.
terrestrial magnetism—Same as geomagnetism.
terrestrial radiation—Longwave radiation originating by thermal emission from the earth's surface and/or its atmosphere; to be distinguished from solar radiation.
terrestrial refraction—A variety of phenomena that result from the refraction of terrestrial light by the earth's atmosphere. It is distinguished from astronomical refraction, which is used when the source is outside our atmosphere.
terrestrial scintillation—See scintillation.
terrestrial surface radiation—Longwave radiation originating by thermal emission from the earth's surface only.
tertiary circulation—(Obsolete.) The generally small, localized atmospheric circulations. They are represented by such phenomena as local winds, thunderstorms, and tornadoes. Compare primary circulation, secondary circulation; see mesometeorology.
Tetens's formula—An analytic expression for saturation vapor pressure, es , given as a function of temperature by where the temperature T is given in °C and the vapor pressure is in kPa. A slightly improved version is shown under Clausius–Clapeyron equation.
Tetens, O., 1930: Uber einige meteorologische Begriffe. Z. Geophys., 6, 297–309.
tethered balloon—A positively buoyant unmanned balloon attached to a cable that is used to raise and lower the balloon. Instrument packages are suspended from the balloon to measure characteristics such as air temperature, winds, humidity, refractive index, trace gases, and aerosols as functions of time (by keeping the height constant) or height (by raising and lowering the balloon). They have been used for measuring both mean values and turbulent fluctuations. Balloon heights of over a kilometer have been reached, and instrument packages are sometimes deployed at more than one height below the balloon. Tethered balloons have been deployed from fixed locations over land and from ships.
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