气候变化领域集成服务门户(CCPortal): Evolution of the Charge Structure and Lightning Discharge Characteristics of a Qinghai-Tibet Plateau Thunderstorm Dominated by Negative Cloud-to-Ground Flashes

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DOI	10.1029/2019JD031129
	Evolution of the Charge Structure and Lightning Discharge Characteristics of a Qinghai-Tibet Plateau Thunderstorm Dominated by Negative Cloud-to-Ground Flashes
	Li Y.; Zhang G.; Zhang Y.
发表日期	2020
ISSN	2169897X
卷号	125 期号:5
英文摘要	The correlation between the charge structure evolution and lightning type and frequency for a multicell thunderstorm dominated by negative cloud-to-ground (CG) flash on the Qinghai-Tibet Plateau was analyzed using observations from a three-dimensional lightning very high frequency radiation source location system. The analysis results showed the following. (1) In the initial developing stage of the thunderstorm, each cell developed independently and presented an inverted dipole charge structure. As the thunderstorm developed into its mature stage, multiple cells merged, and the charge structure changed to a tripole structure. In the dissipation stage of each thunderstorm region, the charge structure reverted to an inverted dipole or a normal dipole. (2) When the extent of the charge region expanded, the upper and lower charge regions became uneven and asymmetric. (3) In the inverted dipole charge structure, negative CG flashes accounted for 77.2% of the total number of lightning flashes, whereas negative intracloud flashes accounted for only 22.8%. In the tripole charge structure, negative CG flashes, positive intracloud flashes, and negative intracloud flashes accounted for 62%, 21%, and 16%, respectively, of all lightning flashes. These results indicate that the middle negative charge region was the strongest layer of the thunderstorm, while the upper positive charge region was slightly stronger, and the lower positive charge region was the weakest. These findings also indicate that the relative intensity of the charge layers directly determined the lightning quantity and frequency. © 2020. The Authors.
英文关键词	Charge structure; Lightning frequency; Lightning type; Negative cloud-to-ground flash; The strong negative charge region; Thunderstorm of Qinghai-Tibet Plateau
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186136
作者单位	Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, China; Institute of Atmospheric Sciences/Department of Atmospheric and Oceanic Sciences, Fudan University, Shanghai, China
推荐引用方式 GB/T 7714	Li Y.,Zhang G.,Zhang Y.. Evolution of the Charge Structure and Lightning Discharge Characteristics of a Qinghai-Tibet Plateau Thunderstorm Dominated by Negative Cloud-to-Ground Flashes[J],2020,125(5).
APA	Li Y.,Zhang G.,&Zhang Y..(2020).Evolution of the Charge Structure and Lightning Discharge Characteristics of a Qinghai-Tibet Plateau Thunderstorm Dominated by Negative Cloud-to-Ground Flashes.Journal of Geophysical Research: Atmospheres,125(5).
MLA	Li Y.,et al."Evolution of the Charge Structure and Lightning Discharge Characteristics of a Qinghai-Tibet Plateau Thunderstorm Dominated by Negative Cloud-to-Ground Flashes".Journal of Geophysical Research: Atmospheres 125.5(2020).