气候变化领域集成服务门户(CCPortal): First Documented Downward Positive Cloud-to-Ground Lightning Initiated by an Upward Negative Lightning

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DOI	10.1029/2021JD034566
	First Documented Downward Positive Cloud-to-Ground Lightning Initiated by an Upward Negative Lightning
	Jiang R.; Lyu W.; Wu B.; Qi Q.; Chen L.; Ma Y.; Lyu F.; Zhu Y.; Rakov V.A.
发表日期	2021
ISSN	2169897X
卷号	126 期号:13
英文摘要	An interesting downward positive cloud-to-ground lightning (DPCG) initiated by an upward negative cloud-to-ground lightning (UNCG) was recorded by the instruments installed at the Tall-Object Lightning Observatory in Guangzhou. The characteristics of the discharges before and after the DPCG return stroke were investigated in detail using both optical and electric field change data. The UNCG was triggered from the tip of the Canton Tower (600 m high) by a distant +CG lightning. A sequence of intracloud (IC) discharges developed toward and connected to several pre-existing channels of the UNCG. As a result, some positive charge was pumped from remote thundercloud regions to the region around the intersection of the pre-existing and new channels. A branch of one IC channel developed from the intersection point toward the ground, transformed into a downward positive leader, terminated on the ground, and resulted in a positive return stroke. After that, the discharge processes in the cloud continued to neutralize the remaining positive charge. The UNCG served to facilitate the IC discharges that supplied positive charges for the DPCG. Most of the charge involved in the UNCG-initiated DPCG originated from remote positively charged regions in the cloud. These observations constitute evidence for a new scenario of the initiation of +CG lightning. © 2021. American Geophysical Union. All Rights Reserved.
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/185121
作者单位	Laboratory of Lightning Physics and Protection Engineering, State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, China; College of Earth Sciences, University of Chinese Academy of Sciences, Beijing, China; Department of Electrical and Computer Engineering, University of Florida, Gainesville, FL, United States; Institute of Tropical and Marine Meteorology, China Meteorological Administration, Guangzhou, China; Nanjing Joint Institute for Atmospheric Sciences, Nanjing, China; Earth System Science Center, University of Alabama, Huntsville, AL, United States
推荐引用方式 GB/T 7714	Jiang R.,Lyu W.,Wu B.,et al. First Documented Downward Positive Cloud-to-Ground Lightning Initiated by an Upward Negative Lightning[J],2021,126(13).
APA	Jiang R..,Lyu W..,Wu B..,Qi Q..,Chen L..,...&Rakov V.A..(2021).First Documented Downward Positive Cloud-to-Ground Lightning Initiated by an Upward Negative Lightning.Journal of Geophysical Research: Atmospheres,126(13).
MLA	Jiang R.,et al."First Documented Downward Positive Cloud-to-Ground Lightning Initiated by an Upward Negative Lightning".Journal of Geophysical Research: Atmospheres 126.13(2021).