Understanding the dynamical-microphysical-electrical processes associated with severe thunderstorms over the Beijing met

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derstanding the dynamical-microphysical-electrical processes associated with severe thunderstorms over the Beijing metropolitan region 1,8*

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Xiushu QIE , Shanfeng YUAN , Zhixiong CHEN , Dongfang WANG , Dongxia LIU , 1,8 1 1 1 1,8 Mengyu SUN , Zhuling SUN , Abhay SRIVASTAVA , Hongbo ZHANG , Jingyu LU , 2,8 1 2 3,9 4,10 1 Hui XIAO , Yongheng BI , Liang FENG , Ye TIAN , Yan XU , Rubin JIANG , 1,8 3 1 4 3 1 Mingyuan LIU , Xian XIAO , Shu DUAN , Debin SU , Chengyun SUN , Wenjing XU , 5,11 1 5,12 6 7 Yijun ZHANG , Gaopeng LU , Da-Lin ZHANG , Yan YIN & Ye YU 1

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Key Laboratory of Middle Atmosphere and Global Environment Observation (LAGEO), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China; Key Laboratory of Cloud-Precipitation Physics and Severe Storms (LACS), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China; Institute of Urban Meteorology, China Meteorological Administration, Beijing 100089, China; 4 College of Atmospheric Science, Chengdu University of Information Technology, Chengdu 610225, China; 5 State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing 100081, China; Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science & 3

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Technology, Nanjing 210044, China; Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; College of Earth and Planetary Science, University of Chinese Academy of Science, Beijing 100049, China; 9 Meteorological Observation Centre, Beijing Meteorological Bureau, Beijing 100081, China; 10 Jiangxi Weather Modification, Nanchang 330096, China; Department of Atmospheric and Oceanic Sciences & Institute of Atmospheric Sciences, Fudan University, Shanghai 200438, China; 12 Department of Atmospheric and Oceanic Science, University of Maryland, Maryland 20742, USA 8

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Received March 11, 2020; revised June 28, 2020; accepted July 7, 2020; published online October 19, 2020

Abstract The Dynamical-microphysical-electrical Processes in Severe Thunderstorms and Lightning Hazards (STORM973) project conducted coordinated comprehensive field observations of thunderstorms in the Beijing metropolitan region (BMR) during the warm season from 2014 to 2018. The aim of the project was to understand how dynamical, microphysical and electrical processes interact in severe thunderstorms in the BMR, and how to assimilate lightning data in numerical weather prediction models to improve severe thunderstorm forecasts. The platforms used in the field campaign included the Beijing Lightning Network (BLNET, consisting of 16 stations), 2 X-band dual linear polarimetric Doppler radars, and 4 laser raindrop spectrometers. The collaboration also made use of the China Meteorological Administration’s mesoscale meteorological observation network in the Beijing-Tianjin-Hebei region. Although diverse t