气候变化领域集成服务门户(CCPortal): Formation of decimeter-scale, long-lived elevated ionic conductivity regions in thunderclouds

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DOI	10.1038/s41612-019-0102-8
	Formation of decimeter-scale, long-lived elevated ionic conductivity regions in thunderclouds
	Iudin D.I.; Rakov V.A.; Syssoev A.A.; Bulatov A.A.; Hayakawa M.
发表日期	2019
ISSN	23973722
卷号	2 期号:1
英文摘要	We propose a scenario in which elevated ionic conductivity regions (EICRs) with dimensions of the order of 0.1–1 m are formed in the turbulent thundercloud environment. The starting point in this scenario is the occurrence of electron avalanches in the vicinity of colliding hydrometeors, leading to the formation of ion production centers. Their dimensions are of the order of 1 0 − 3− 1 0 − 2 m, and their lifetime is of the order of 1 0 − 4− 1 0 − 3 s. When a new ion production center is created inside the decimeter-scale residual ion concentration spot left behind by a previously established center, the local ion concentration steadily increases, which leads to the formation of decimeter-scale EICRs whose lifetime is measured in seconds. The relatively high conductivity of EICRs (up to 1 0 − 9 S/m or so) relative to the background conductivity (1 0 − 14 S/m or less) ensures their polarization in external electric field within a few milliseconds or so. The EICR formation mechanism requires only one condition: the rate of occurrence of ion production centers per unit time in a unit volume should exceed the percolation-theory-based critical level of 1 0 − 1 m− 3 s− 1. Hydrometeor collision rates three and even four orders of magnitude higher than this value have been reported from observations. Presence of EICRs in the cloud provides local electric field enhancements and pre-ionization levels that will lead to the formation of additional ion production centers and may be sufficient for the initiation and development of streamers and, eventually, lightning. © 2019, The Author(s).
语种	英语
scopus关键词	atmospheric electricity; electric field; electrical conductivity; ionic composition; lightning; thundercloud; turbulent boundary layer
来源期刊	npj Climate and Atmospheric Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178079
作者单位	Institute of Applied Physics of the Russian Academy of Sciences, Nizhny Novgorod, Russian Federation; Privolzhsky Research Medical University, Nizhny Novgorod, Russian Federation; Space Research Institute of the Russian Academy of Sciences, Moscow, Russian Federation; Federal State Budgetary Educational Institution of Higher Education “Nizhny Novgorod State University of Architecture and Civil Engineering”, Nizhny Novgorod, Russian Federation; Department of Electrical and Computer Engineering, University of Florida, Gainesville, FL, United States; The University of Electro-Communications, Chofu, Tokyo, Japan
推荐引用方式 GB/T 7714	Iudin D.I.,Rakov V.A.,Syssoev A.A.,et al. Formation of decimeter-scale, long-lived elevated ionic conductivity regions in thunderclouds[J],2019,2(1).
APA	Iudin D.I.,Rakov V.A.,Syssoev A.A.,Bulatov A.A.,&Hayakawa M..(2019).Formation of decimeter-scale, long-lived elevated ionic conductivity regions in thunderclouds.npj Climate and Atmospheric Science,2(1).
MLA	Iudin D.I.,et al."Formation of decimeter-scale, long-lived elevated ionic conductivity regions in thunderclouds".npj Climate and Atmospheric Science 2.1(2019).