airmass
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See also: air mass
English
Alternative forms
Etymology
Noun
airmass (plural airmasses)
- (physics, meteorology) a widespread body of air, the properties of which can be identified as: (a) having been established while that air was situated over a particular region of the Earth's surface (airmass source region) and (b) undergoing specific modifications while in transit away from the source region. An air mass is often defined as a widespread body of air that is approximately homogeneous in its horizontal extent, particularly with reference to temperature and moisture distribution; in addition, the vertical temperature and moisture variations are approximately the same over its horizontal extent.
- (astronomy) The amount of air through which light from a celestial object passes, normalized to 1 for an object at zenith.
- 2007, Th. Ratzka et al., “High spatial resolution mid-infrared observations of the low-mass young star TW Hydrae”, in Astronomy and Astrophysics, volume 471, :
- Unfortunately, the extinction is very sensitive to the airmass […]
Translations
a body of air with uniform characteristics
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See also
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