Jianfei Wu¹, Wuhu Feng², Daniel Robert Marsh³, Hanli Liu⁴, Xianghui Xue⁵, Xiankang Dou¹ and John M C Plane⁶, (1)University of Science and Technology of China, Hefei, China, (2)University of Leeds, School of Earth and Environment, Leeds, United Kingdom, (3)National Center for Atmospheric Research, Boulder, CO, United States, (4)NCAR, Boulder, CO, United States, (5)Univ. of Sci.& Tech. of China, Hefei, Anhui, China, (6)University of Leeds, Leeds, LS2, United Kingdom