Unusually low O3, HCl, and HNO3 column measurements at Eureka, Canada during spring 2011

K. Strong, R.L. Batchelor, M.P. Chipperfield, W.H. Daffer, J.R. Drummond, T.J. Duck, H. Fast, W. Feng, P.F. Fogal, F. Kolonjari, G.L. Manney, A. Manson, C. Meek, R.L. Mittermaier, G.J. Nott, C. Perro, and K.A. Walker