Zhai, S., X. Wang, J.R. McConnell, L. Geng, J. Cole-Dai, N. Chellman, T. Sherwen, R. Pound, K. Fujita, S. Hattori, J.M. Moch, L. Zhu, M.J. Evans, M. Legrand, P. Liu, D. Pasteris, Y.-C. Chan, L.T. Murray, and Becky Alexander, Anthropogenic impacts on tropospheric reactive chlorine since the preindustrial, in revision, Geophys. Res. Lett.;