# Dry adiabat

From AMS Glossary

## dry adiabat

A line of constant potential temperature on a thermodynamic diagram.

In terms of pressure where

*p*, and specific volume α, the equation for a dry adiabat may be written*c*_{p}and*c*_{v}are the specific heats of dry air at constant pressure and volume, respectively. Meteorologically, the dry adiabat is intended to represent the lifting of dry air in a dry-adiabatic process. Since this is also an isentropic process, a dry adiabat is an isentrope.*Compare*saturation adiabat;*see*Poisson equation.