Weidong Guo, Nanjing University, School of Atmospheric Sciences,Joint International Research Laboratory of Atmospheric and Earth System Sciences, Nanjing, China, Zhiqiang Lin, School of Atmospheric Sciences, Nanjing University, Nanjing, China, La Jia, Tibetan Meteorological Observatory, Meteorological Bureau of Tibet Autonomous Region, Lhasa, China, Xiuping Yao, China Meteorological Administration Training Center, China Meteorological Administration, Beijing, China and Zhenbo Zhou, Meteorological Station of Tibet Autonomous Region, CMA, Lhasa, China