Lyndsay Ives¹, Beth S Nelson², K Read², Mayara S Lourenço³, Luis Neves³, Stephen Andrews², Thomas Derrah¹, Lucy Carpenter¹ and Ryan Pound⁴, (1)Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry, University of York, York, United Kingdom, (2)National Centre for Atmospheric Science, University of York, York, United Kingdom, (3)Instituto Nacional de Meteorologia e Geofísica, Mindelo, Cape Verde, (4)University of York, Wolfson Atmospheric Chemistry Laboratories, Department of Chemistry, York, United Kingdom