1. Key Laboratory of Arid Climatic Changing and Reducing Disaster of Gansu Province, Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences; Lanzhou University; Lanzhou China
2. Center for Analysis and Prediction of Storms, and School of Meteorology; University of Oklahoma; Norman Oklahoma USA
3. Institute of Arid Meteorology; China Meteorological Administration; Lanzhou China