MacDonald, Alexander Forsyth, 1897-1965 · Port Credit, Ont. : Aviation Service Corporation · leaf 48
igives rise to cloud and rain formation, turbulence andsometimes thunderstorms. If a mass of air is cooler than the air around it, it isSTABLE. (Fig. 2). If disturbed, it will tend to sink backto its original level. Stable air means stable weatherconditions. An air mass whose temperature is the… … EQUILIBRIUM fi%. 1. Pig. 2. Fig. J. In the above we have considered the case masses,or hunks of air which have, for any reason, been dis-placed upwards. If a layer of air becomes either heatedfrom below or cooled from above, it will have a steeptemperature lapse rate. It will therefore be…
Airplanes
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