SUBTROPICAL AIR An air mass that forms over the subtropical region. The air is typically warm with a high moisture content due to the low evaporative process.
Polar JetMarked by a concentration of isotherms and strong vertical shear, this jet is the boundary between the polar air and the subtropical air.
The boundary between subtropical air and tropical air, marked by a concentration of isotherms and vertical shear. Migrates north in the southern hemisphere winter.
Sublimation ...
Polar Front: Front that separates the Polar Air Mass from the Subtropical Air Mass.
Precipitation: Any form of water, liquid or solid, derived from the atmosphere that falls to the earth's surface. It can be rain, snow, hail etc.
 See also: Earth, Air mass, Surface, Atmosphere, Precipitation
  
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