Pamela Dominutti¹, Shona Wilde², Ruth Purvis², James R Hopkins³, Stuart Young⁴, Stephen Andrews³, Prudence Bateson⁵, Jacob Shaw⁵, Grant Allen⁶, James L France⁷, Max Coleman⁷, Rebecca Fisher⁷, David Lowry⁷, Anna E. Jones⁸, Tom Lachlan-Cope⁸ and Alexandra Weiss⁸, (1)Wolfson Atmospheric Chemistry Laboratories, University of York, York, United Kingdom, (2)University of York, Department of Chemistry, York, United Kingdom, (3)University of York, Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry, York, United Kingdom, (4)Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry, York, United Kingdom, (5)University of Manchester, Manchester, United Kingdom, (6)University of Manchester, Manchester, M13, United Kingdom, (7)Royal Holloway, University of London, Egham, United Kingdom, (8)NERC British Antarctic Survey, Cambridge, United Kingdom