Measurements of polar vortex air in the midlatitudes

Newman, P., L. R. Lait, M. R. Schoeberl, M. Seablom, L. Coy, R. Rood, R. Swinbank, M. Proffitt, M. Loewenstein, J. Podolske, J. W. Elkins, C. R. Webster, R. May, D. Fahey, G. Dutton, and R. Chan (1996), Measurements of polar vortex air in the midlatitudes, J. Geophys. Res., 101, 12,879-12.