The dry adiabatic lapse rate (Γd) relates to gravitational acceleration (g) and the specific heat of air at constant pressure (cp) via the formula Γd = g/cp. If an atmosphere's observed lapse rate is assumed to correspond to the dry adiabatic value (i.e., a neutrally stable, dry-adiabatic atmosphere), this relation can be inverted to solve for the planet's surface gravity given the lapse rate and the gas's specific heat.