Potential Vorticity Estimates in the South Polar Vortex from ER-2 Data

Hartmann, ., . Chan, B.L. Gary, M.R. Schroeberl, P.A. Newman, R.L. Martin, M. Loewenstein, J.R. Podolske, and S. Strahan (1989), Potential Vorticity Estimates in the South Polar Vortex from ER-2 Data, J. Geophys. Res., 94, 11,625-11.