DOI: 10.1016/j.atmosres.2018.10.011
Scopus记录号: 2-s2.0-85055986444
论文题名: Improved lightning model: Application to discuss the characteristics of upward lightning
作者: Tan Y. ; Zheng T. ; Shi Z.
刊名: Atmospheric Research
ISSN: 1698095
出版年: 2019
卷: 217 起始页码: 63
结束页码: 72
语种: 英语
英文关键词: Nearby-lightning-triggered upward lightning
; Self-initiated upward lightning
; Upward lightning parameterization scheme
Scopus关键词: Electric fields
; Integrated circuits
; Lightning
; Stochastic models
; Stochastic systems
; Cloud-to-ground lightning
; Lightning discharge
; Parameterization schemes
; Positive charges
; Tall structures
; Thundercloud electrification
; Upward lightning
; Weighted averages
; Clouds
; cloud to ground lightning
; computer simulation
; electric field
; lightning
; stochasticity
; thundercloud
; two-dimensional modeling
英文摘要: A stochastic discharge parameterization scheme of upward lightning is presented and embedded into an existing fine resolution two-dimensional thundercloud electrification and lightning model. At present, our lightning model can simulate not only intra-cloud (IC) lightning and cloud-to-ground (CG) lightning but also upward lightning. By this improved model, 139 upward flashes originating from the tall structures were obtained. Out of these upward flashes, 67 cases occur without any nearby preceding lightning discharges (called self-initiated upward flashes), whereas 72 cases are triggered by the preceding lightning discharges (called nearby-lightning-triggered upward flashes). The relationship between the initiation of self-initiated upward flashes and thundercloud electrical environment parameters is discussed. The results show that the initiation of self-initiated upward flashes is related to the weighted average of the lower charge heights (H) and the average of the lower charge density (D). As D increases, the critical H increases. In addition, the reason for IC lightning or upward lightning triggering upward lightning is investigated. IC lightning discharges or upward lightning discharges neutralize the main negative charge region in the cloud and enhance the influence of the lower positive charge region on the ground electric field. © 2018 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122371
Appears in Collections: 气候变化事实与影响
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作者单位: Key Laboratory of Meteorological Disaster, Ministry of Education (KLME), Joint International Research Laboratory of Climate and Environment Change (ILCEC), Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD), Key Laboratory for Aerosol–Cloud–Precipitation of China Meteorological Administration, Nanjing University of Information Science & Technology, Nanjing, 210044, China
Recommended Citation:
Tan Y.,Zheng T.,Shi Z.. Improved lightning model: Application to discuss the characteristics of upward lightning[J]. Atmospheric Research,2019-01-01,217