Mean ages of stratospheric air derived from in situ observations of CO2, CH4, and N2O

Andrews, A.E., K.A. Boering, B.C. Daube, S. Wofsy, M. Loewenstein, H. Jost, J.R. Podolske, C.R. Webster, R.L. Herman, D.C. Scott, G. Flesch, E.J. Moyer, J.W. Elkins, G.S. Dutton, D.F. Hurst, F.L. Moore, E.A. Ray, P. Romashkin, and S. Strahan (2001), Mean ages of stratospheric air derived from in situ observations of CO2, CH4, and N2O, J. Geophys. Res., 106, 32.