airmass source region
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English
Noun
airmass source region (plural airmass source regions)
- (physics, meteorology) An extensive area of the Earth's surface over which bodies of air frequently remain for a sufficient time to acquire characteristic temperature and moisture properties imparted by that surface. Air so modified becomes identifiable as a distinct air mass. See airmass.
References
FM 3-6 Field Behavior of NBC Agents.