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DOI | 10.1029/2018JD029096 |
Broadband RF Interferometric Mapping and Polarization (BIMAP) Observations of Lightning Discharges: Revealing New Physics Insights Into Breakdown Processes | |
Shao, Xuan-Min1; Ho, Cheng1; Caffrey, Michael1; Graham, Paul1; Haynes, Brian1; Bowers, Gregory1; Blaine, William1; Dingus, Brenda1; Smith, David2; Rassoul, Hamid3 | |
2018-09-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2018 |
卷号 | 123期号:18页码:10307-10321 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Broadband radio frequency (RF) interferometry was first introduced in 1996 for lightning studies. The technique has since been improved significantly and has been increasingly widely used in the lightning community. In addition to the interferometry, we now introduce a broadband polarization capability that simultaneously measures the full polarization state of the corresponding RF sources. Polarization observation provides another level of understanding of the discharge processes. In this paper, we describe the new system and present example observations with such a system. Initial observations of impulsive lightning RF pulses, a K-event leader, and the initiating process for an intracloud flash are presented. The impulsive pulses were often linearly polarized and are consistent with conventional breakdown processes, whereas some occasional pulses were elliptically polarized and are likely related to relativistic breakdown processes. The K-event was detected polarized along a section of its channel, and the orientation of the polarization was mostly orthogonal to the channel, apparently due to the preceding charge deposition along the channel. The intracloud flash in this paper was initiated with downward fast positive streamers, and the corresponding signals were linearly polarized, consistent with conventional breakdown processes. The orientations of the polarization were nearly uniformly aligned with the propagation direction of the streamers, indicating a near uniform electric field in the region of the initiating streamers. Finally, an observation of a cosmic-ray shower is presented. |
英文关键词 | lightning physics interferometry polarization lightning initiation |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000447807300018 |
WOS关键词 | FORTE SATELLITE ; VHF RADIATION ; THUNDERSTORMS ; EMISSIONS ; SYSTEM |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/33693 |
专题 | 气候变化 |
作者单位 | 1.Los Alamos Natl Lab, Los Alamos, NM 87545 USA; 2.Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA; 3.Florida Inst Technol, Melbourne, FL 32901 USA |
推荐引用方式 GB/T 7714 | Shao, Xuan-Min,Ho, Cheng,Caffrey, Michael,et al. Broadband RF Interferometric Mapping and Polarization (BIMAP) Observations of Lightning Discharges: Revealing New Physics Insights Into Breakdown Processes[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(18):10307-10321. |
APA | Shao, Xuan-Min.,Ho, Cheng.,Caffrey, Michael.,Graham, Paul.,Haynes, Brian.,...&Rassoul, Hamid.(2018).Broadband RF Interferometric Mapping and Polarization (BIMAP) Observations of Lightning Discharges: Revealing New Physics Insights Into Breakdown Processes.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(18),10307-10321. |
MLA | Shao, Xuan-Min,et al."Broadband RF Interferometric Mapping and Polarization (BIMAP) Observations of Lightning Discharges: Revealing New Physics Insights Into Breakdown Processes".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.18(2018):10307-10321. |
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