Constraints on the seasonal cycle of stratospheric water vapor using in situ measurements from the ER-2 and a CO photochemical clock

Weinstock, E., E.J. Hintsa, D.B. Kirk-Davidoff, J.G. Anderson, A.E. Andrews, R.L. Newman, C.R. Webster, M. Loewenstein, J.R. Podolske, and T.V. Bui (2001), Constraints on the seasonal cycle of stratospheric water vapor using in situ measurements from the ER-2 and a CO photochemical clock, J. Geophys. Res., 106, 22707-22734, doi:2000JD000047.