Source regions Regions where air masses originate and acquire their properties of temperature and moisture.
Source Regions: Regions where an air mass forms. (Example: The Arctic).
Specific Heat Of Water:Specific Heat Of Water is 1.0: Water takes longer to heat and longer to cool than any other substance.
In this system, air masses are designated first according to the thermal properties of their source regions: tropical (T); polar (P); and less frequently, arctic or antarctic (A).
The best source regions for air masses are large flat areas where air can be stagnant long enough to take on the characteristics of the surface below.
Arctic high Anticyclone originating in the source regions for cold, dry arctic air.
Atmosphere A thin envelope of gasses (also containing suspended solid and liquid particles and clouds) that encircles the globe.
The tides generated are then able to propagate away from these source regions and ascend into the mesosphere and thermosphere. Atmospheric tides can be measured as regular fluctuations in wind, temperature, density and pressure.
Continental polar air (cP) has cold surface temperatures, low moisture content, and, especially in its source regions, has great stability in the lower layers. It is shallow in comparison with Arctic air.
 See also: Surface, Moisture, Weather, Air mass, Temperature
  
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