air mass

名词 n.
中文释义
英 /ˈɛː mas/    美 /ɛəɹ mæs/|/ɛːɹ mæs/

英文释义

名词 n.
  1. 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.
  2. The amount of air through which light from a celestial object passes, normalized to 1 for an object at zenith.
    — Unfortunately, the extinction is very sensitive to the airmass[…]

词形变化

air masses plural airmass alternative

词源

From air + mass. Perhaps a calque of German Luftmasse.
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