MacDonald, Alexander Forsyth, 1897-1965 · Port Credit, Ont. : Aviation Service Corporation · leaf 57
he area contained within the bulge of the PolarFront is marked Warm Sector. It wUl be seen thatthe Warm Sector contains the warm or Equatorial Airconcerned in the Depression, while the rest of the areacovered by the Depression is composed of the PolarAir concerned. The two lines of Discontinuity,… … The Warm FrontAs a mass of warm air advances on a mass ofcold air, the warm air, being hghter, ascends over thecold air in a long gentle slope. The rising warm aiigives rise to the cloud sequence showm in Fig. 19ranging from high Cirrus, down through Altoslratus toNimbostratus. Thus the approach of…
Airplanes
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