Wuhu Feng, University of Leeds, National Centre for Atmospheric Science, Leeds, United Kingdom, John M C Plane, University of Leeds, Leeds, LS2, United Kingdom, Daniel Robert Marsh, National Center for Atmospheric Research, Boulder, CO, United States, Martyn Chipperfield, University of Leeds, School of Earth and Environment, Leeds, United Kingdom, Juan Diego Carrillo Sánchez, University of Leeds, Leeds, United Kingdom, Jianfei Wu, USTC University of Science and Technology of China, Hefei, China and Hanli Liu, NCAR, Boulder, CO, United States