globalchange  > 影响、适应和脆弱性
DOI: 10.1002/jgrd.50295
论文题名:
Observations of compact intracloud lightning discharges in the northernmost region (51°N) of China
作者: Lü F.; Zhu B.; Zhou H.; Rakov V.A.; Xu W.; Qin Z.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期:10
起始页码: 4458
结束页码: 4465
语种: 英语
英文关键词: CIDs ; lightning ; NBEs
Scopus关键词: Electric fields ; Ionosphere ; CIDs ; Electric and magnetic fields ; Electric field pulse ; Experimental datum ; High-latitude regions ; Intracloud discharge ; Lightning discharge ; NBEs ; Lightning ; data acquisition ; electric field ; ionosphere ; latitude ; lightning ; magnetic field ; radar ; summer ; China
英文摘要: Using a three-station wideband electric and magnetic field measuring network in conjunction with VHF receivers, we recorded the so-called compact intracloud discharges (CIDs) in the Greater Khingan Range (51°N) in Northeast China. This type of lightning discharge had never been observed in such high-latitude regions before. During the summer seasons of 2009 and 2010, a total of 493 CIDs with positive electric field pulses (negative charge moving up) occurring in 31 thunderstorms was recorded, with 87% (27/31) of CID-producing storms generating less than 20 CIDs. The CID occurrence observed at 51°N appears to differ significantly from that in most lower latitude regions. Specifically, CIDs accounted only for 0.034% of the total of 1.4 million recorded lightning events, and no CIDs with negative electric field pulses (positive charge moving up) were observed. A total of 202 CIDs was located and they clustered at altitudes ranging from 5 to 12 km above ground level (agl), with a median height of 7.9 km agl. The effective ionosphere heights ranged from 75 to 95 km during the time period of 15:00-06:00 (local time). The median maximum heights of the 30 dBZ radar echo for convective cells with CIDs and without CIDs were 10.8 and 9.4 km, respectively. We infer that a relatively small vertical extent of thunderclouds, limited by the height of the tropopause, and a lack of vigorous convective surges in higher-latitude regions might be responsible for the paucity or absence of CIDs in general and apparent suppression of those with negative electric field pulses in particular. Key Points The first experimental data on CIDs at higher latitudes are presentedNo CIDs with -NBPs were observed during 2 year observationCIDs in this area differ significantly from that in most lower latitude regions ©2013. American Geophysical Union. All Rights Reserved.
资助项目: 41075001 ; HR0011-10-1-0061
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63717
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: CAS Key Laboratory of Geospace Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, China; Division of Electromagnetic Engineering, School of Electrical Engineering, KTH Royal Institute of Technology, Stockholm, Sweden; Department of Electrical and Computer Engineering, University of Florida, Gainesville FL, United States

Recommended Citation:
Lü F.,Zhu B.,Zhou H.,et al. Observations of compact intracloud lightning discharges in the northernmost region (51°N) of China[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(10)
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