Schneider, T., K. L. Smith, P. A. O'Gorman, and C. C. Walker, 2006: A climatology of tropospheric zonal - mean water vapor fields and fluxes in isentropic coordinates. (climate-dynamics.org)
On the use and significance of isentropic potential vorticity maps. (rmets.org)
Not adiabatic, not isentropic, but work, from the gas volume shrinking. (globalwarmingsolved.com)