AIR MASSES Lect 14

AIR MASSES Lect 14 - AIR MASSES & FRONTS Air Mass: an...

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Air Mass: an immense body of air, some 1600+ km across and 1-3 km thick, with relatively homogeneous physical properties (density, T° & moisture) at a given altitude Classification Scheme: 2-letter abbreviations are used to indicate Source Region , * first letter: reference to surface over which it develops & thus the level of humidity c == continental : forms over a landmass = low water vapor content; Dry m == maritime : forms over an ocean = high water vapor content; Humid * second letter: reference to latitude or source region of origin & thus T° (cold vs. warm) A == arctic ; bitterly cold P == polar ; very cold T == tropical ; warm E == equatorial ; very warm Source Regions: area in which air mass originates ** source regions determines initial characteristics of the air mass; cold vs. warm, dry vs. humid Types of Air Masses: * Continental Arctic (cA) : Arctic basin & Greenland; bitterly cold & dry; Stable
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This note was uploaded on 10/07/2011 for the course GEOG 1111 taught by Professor Hopkins during the Fall '08 term at UGA.

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AIR MASSES Lect 14 - AIR MASSES & FRONTS Air Mass: an...

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