1Analysis on Radar Echo Characteristics of a Hail Cloud Development and the Physical Test of Its Hail Suppression EffectYao Zhanyu, Zhao Jieyun, Tu Qi, Zhang Zequn, Liu Zhen, Wang Weijian, Yao ZhendongARTICLES1-122Spatio-temporal Variation Characteristics of Snowfall and Snowfall Ratio in Henan Province Based on Snowfall IdentificationZhang Fan, Cheng KaiqiARTICLES13-223Analysis on Characteristics of Extreme Hourly Precipitation in Warm Season in the Haihe River Basin from 2010 to 2019Chen Hong, Yang Yang, Zhang Nan, Wang Jing, Yi Xiaoyuan, Zhou JunARTICLES23-314Analysis on Characteristics of the Raindrop Size Distribution Between Tropical Cyclone Rainstorm and Warm-Sector Rainstorm in Beibu Gulf CoastMao Jiashen, Liao Shengshi, Jiang Yaping, Li Huashi, Wei JingARTICLES32-415Analysis on Snow Particle Spectrum Characteristics of a Typical Cold-flow Blizzard in Shandong PeninsulaZhou Shuling, Cong Meihuan, Zhou Dan, Wang JunARTICLES42-506Analysis on Causes of a Thunderstorm Gale in the Rear of High-Level Cold Vortex in Northern Zhejiang ProvinceWu Fulang, Yang Limin, Zhang Jingjing, Tao Yufeng, Cao Wen, Yang MingzhuARTICLES51-597Study on Risk Warning Method of Rainfall-induced Geological Disasters in Sichuan Province Based on Probability ModelDeng Guowei, Sun Jun, Guo Haiyan, Xu Yuanxin, Xu JinxiaARTICLES60-688Classification of Heavy Pollution Weather in Luohe in Autumn and Winter and Its Correlation with Meteorological FactorsWu Wei, Shan TieliangARTICLES69-779Spatio-temporal Changes and Impact Factors of Comprehensive Natural Disaster Risks in Shaanxi Province Based on Precipitation DataMeng Ru, Zhang Jing, Zhou Jingming, Su Xuemeng, Wang QianruARTICLES78-8710Characteristics of the Lightning Activity During a Thunderstorm Process in Xi'anHuang Qin, Long Yaxing, Huang Xin, Gao LiangshuARTICLES88-9711Vehicle-carried Observation and Hotspot Identification of the Near-Surface Atmospheric CO2 and CH4 Concentration in WuxiSun Qiran, Li Ruonan, Hu Ning, Zheng Youfei, Qiao Zheng, Zhang Yiting, Ji Chonggui, Liu Jiaying, Xiao WeiAPPLIED TECHNIQUE98-10412Study on Quality Control Methods of Automatic Temperature ObservationLi PengfeiAPPLIED TECHNIQUE105-111 