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Airmass a.k.a. Air mass: In astronomy, air mass is the optical path length through Earth’s atmosphere for light from a celestial source. As it passes through the atmosphere, light is attenuated by scattering and absorption; the more atmosphere through which it passes, the greater the attenuation. Consequently, celestial bodies at the horizon appear less bright than when at the zenith. The attenuation, known as atmospheric extinction, is described quantitatively by the Beer–Lambert–Bouguer law.
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GPU PRO 3 (2012)
Advanced Rendering Techniques by Wolfgang Engel
The airmass is an integral of the air density ρ(t) along the path: T = exp (−βm), ∫. Figure 2.1. Atmospheric scattering 101. See the text for an explanation of the symbols. density to a reference density ρ0 at reference altitude R. 106 II Rendering.
Extreme Weather and Climate (2016)
Earth sciences, Earth sciences by CTI Reviews
Convective instability: In meteorology, convective instability or stability of an airmass refers to its ability to resist vertical motion. A stable atmosphere makes vertical movement difficult, and small vertical disturbances dampen out and disappear.
by John E. Oliver
Airmass climatology is again a fertile ground for discussion and research. An airmass is a large body of air with relatively uniform temperature, humidity, and lapse rate characteristics across its horizontal extent. Especially in the midlatitudes, ...
front A front is an airmass boundary. It divides air of different properties, e.g. warm from cold. frontal depression Afrontal depression is a low pressure centre with two frontal surfaces, a cold frontal ...
Marine Affairs Dictionary (2004)
Terms, Concepts, Laws, Court Cases, and International Conventions and Agreements by Niels West
CHINOOK: Warm dry wind caused by the adiabatic warming of an airmass as it ...
A Dictionary of Weather (2008)
by Storm Dunlop
agglomeration aggregation Agulhas Current air air frost airglow air mass airmass analysis airmass climatology airmass thunderstorm air meter Aitken nucleus Alaska Current albedo Aleutian Current Aleutian low Alexander's dark band ...
Federal Aviation Administration by Federal Aviation Administration Federal Aviation Administration
An airmass passing over a warmer surface will be warmed from below, and convective currents form, causing the air to rise. This creates an unstable air mass with good surface visibility. Moist, unstable air causes cumulus clouds ...
by Shatrughna Prasad Sinha
airmass is replaced by another, temperature and humidity characteristics change. For example, the Mississippi River valley is typically dominated by warm, moist maritime tropical (mT) air from the Gulf of Mexico in summer. There is ample ...
by Richard B. Lee, Richard Heywood Daly
Ecological setting and population The extreme winter climate of the region ( shaped by the Arctic airmass) limited traders' winter mobility. The Temperate airmass, which creates an intense growing season from June to September, allowed ...
Airgun Airmass An artificial source of vibration used for submarine exploration. Path traversed by starlight before it reaches the detector. Airy George Sir George Bidell Airy served as the director of Greenwich Observatory of England from ...
by S.E. Stiegeler
Sometimes as the depression moves eastwards along the occlusion, the line of airmass contrast to the north of the depression swings anticlockwise giving a further period of rain. This is known as a back-bent occlusion. Ocean ocean.
Dictionary Of Environment (2008)
by Kulwant Rai Gupta, Ashish Kumar Gupta & Suriti Gupta
Airmass. A widespread body of in the atmosphere that gains certain meteorological or polluted characteristics while set in one location.
by Michael Allaby
air mass (airmass) Large body of air (sometimes of oceanic or continental proportions) identified primarily by an approximately constant wet-bulb-potential ...
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Video about Airmass
Video shows what airmass means. a widespread body of air, the properties of which can be identified as: (a) having been established while that air was situated ...
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Scrabble value of A1I1R1M3A1S1S1
The value of this 7-letter word is 9 points, but it's not an accepted word in the Official Scrabble Players Dictionary.
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