1. National Meteorological Information Center; Beijing China
2. State Key Laboratory of Severe Weather; Chinese Academy of Meteorological Sciences; Beijing China
3. Institute of Atmospheric Physics; Chinese Academy of Sciences; Beijing China
4. Climatic Research Unit, School of Environmental Sciences; University of East Anglia; Norwich UK
5. Center of Excellence for Climate Change Research/Department of Meteorology; King Abdulaziz University; Jeddah Saudi Arabia