Charge structure of a summer thunderstorm in North China: Simulation using a Regional Atmospheric Model System

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• 作者：Dongxia Liu (1) (2)
  Xiushu Qie (1) (2)
  Liang Peng (3)
  Wanli Li (4)
  
• 关键词：RAMS ; electrification parameterization ; discharge parameterization ; charge structure ; thunderstorm
• 刊名：Advances in Atmospheric Sciences
• 出版年：2014
• 出版时间：September 2014
• 年：2014
• 卷：31
• 期：5
• 页码：1022-1034
• 全文大小：812 KB
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• 作者单位：Dongxia Liu (1) (2)
  Xiushu Qie (1) (2)
  Liang Peng (3)
  Wanli Li (4)
  
  1. Key Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China
  2. Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing, 210044, China
  3. National Center of Atmospheric Research, Boulder, 80302, USA
  4. China Meteorological Administration Training Center, Beijing, 100081, China
  
• ISSN：1861-9533

文摘

Electrification and simple discharge schemes are coupled into a 3D Regional Atmospheric Model System (RAMS) as microphysical parameterizations, in accordance with electrical experiment results. The dynamics, microphysics, and electrification components are fully integrated into the RAMS model, and the inductive and non-inductive electrification mechanisms are considered in the charging process. The results indicate that the thunderstorm mainly had a normal tripole charge structure. The simulated charge structure and lightning frequency are basically consistent with observations of the lightning radiation source distribution. The non-inductive charging mechanism contributed to the electrification during the whole lifetime of the thunderstorm, while the inductive electrification mechanism played a significant role in the development period and the mature stage when the electric field reached a large value. The charge structure in the convective region and the rearward region are analyzed, showing that the charge density in the convective region was double that in the rearward region.