1. LASG, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China.
2. University of Chinese Academy of Sciences, Beijing 100049, China.
3. CAS Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences (CAS), Beijing 100101, China.
4. Department of Atmospheric and Environmental Sciences, University at Albany, State University of New York, Albany, NY, USA.
5. Max Planck Institute for Meteorology, Hamburg, Germany.