Department of Atmospheric and Oceanic Sciences Peking University Beijing 100871 China;
Department of Meteorology and Atmospheric Science The Pennsylvania State University University Park PA 16802 USA;
Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China;
School of Atmospheric Science Nanjing University Nanjing 210093 China;
National Meteorological Center Beijing 100081 China;
School of Atmospheric Sciences Nanjing University of Information Science and Technology Nanjing 210044 China;
Atmospheric sciences; Synoptic meteorology; Weather; 70-year progresses;