1. Applied Hydrometeorological Research Institute, Nanjing University of Information Science & Technology Nanjing 210044, China
2. Polar Research Institute of China
451 Jinqiao Road
Pu Dong, Shanghai 200136, China
3. Department of Geography, 208 Geography Building, Michigan State University East Lansing MI 48824, USA
4. Institute of Atmospheric Physics, Chinese Academy of Sciences Beijing 100029, China