Isabel Louise McCoy¹, Daniel T McCoy², Robert Wood¹, Leighton Anunda Regayre², Dan Grosvenor², Jane Patricia Mulcahy³, Yongxiang Hu⁴, Frida Bender⁵, Paul Field⁶, Ken S Carslaw⁷ and Hamish Gordon², (1)University of Washington, Seattle, WA, United States, (2)University of Leeds, Leeds, United Kingdom, (3)Met Office Hadley Centre for Climate Change, Exeter, United Kingdom, (4)NASA Langley Research Center, Hampton, VA, United States, (5)Stockholm University, Stockholm, Sweden, (6)United Kingdom Met Office, Exeter, United Kingdom, (7)University of Leeds, Leeds, LS2, United Kingdom