DRY ADIABAT

The lifting of dry air, or air that does not contain water vapor. As a parcel lifts, its pressure decreases, and since pressure decreases with height, the air temperature falls due to expansion. When air is dry and is lifted adiabatically, then the temperature decreases at a rate of 1 degree Celsius per 100 meters (5.5 degrees Fahrenheit per 1,000 feet). Contrast with a moist adiabat.