ABSTRACT
A ADIABATIC TEMPERATURE CHANGES
The displacement of an air parcel to an environment of lower pressure (without heat exchange with surrounding air) causes an increase in its volume and a consequent lowering of its temperature. A volume increase involves work and the consumption of energy, thus reducing the heat available per unit volume and hence the temperature. Such a temperature change, involving no subtraction or addition of heat, is termed adiabatic. Vertical displacements of air are obviously a major cause of adiabatic temperature changes.
