Cloud Thermodynamic Models in Saturation Point Coordinates.
One-dimensional thermodynamic models for cloud-environment mixing, evaporation into downdrafts and precipitation from updrafts are presented in a parallel treatment using convective pressure scales and saturation point coordinates. This common framework can be used to interpret data sets and estimate from them pressure scales for the complex physical processes in cumulus.
Betts, A. K., 1982: Cloud Thermodynamic Models in Saturation Point Coordinates. J. Atmos. Sci., 39, 2182- 2191.