1. Qingdao Meteorological Bureau, 4 Fulong Shan, Shinan District, Qingdao, Shandong 266003, China
2. Hangzhou Meteorological Bureau, Hangzhou, Zhejiang 310008, China
3. Department of Synthetic Observing, China Meteorological Administration, Beijing 100081, China
4. Department of Marine, Earth, and Atmospheric Sciences, NC State University, Raleigh, North Carolina 27695, USA