Severe 2011 ozone depletion assessed with 11 years of ozone, NO2, and OClO measurements at 80N

K. Strong, X. Zhao, M.R. Bassford, M.P. Chipperfield, W. Daffer, J.R. Drummond, E.E. Farahani, W. Feng, A. Fraser, F. Goutail, G. Manney, C.A. McLinden, A. Pazmino, M. Rex, and K.A. Walker