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DOI | 10.1002/2017JD027050 |
Determination of the Global-Average Charge Moment of a Lightning Flash Using Schumann Resonances and the LIS/OTD Lightning Data | |
Boldi, Robert1; Williams, Earle2; Guha, Anirban3 | |
2018-01-16 | |
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:1页码:108-123 |
文章类型 | Article |
语种 | 英语 |
国家 | U Arab Emirates; USA; India |
英文摘要 | In this paper, we use (1) the 20year record of Schumann resonance (SR) signals measured at West Greenwich Rhode Island, USA, (2) the 19year Lightning Imaging Sensor (LIS)/Optical Transient Detector (OTD) lightning data, and (3) the normal mode equations for a uniform cavity model to quantify the relationship between the observed Schumann resonance modal intensity and the global-average vertical charge moment change M (C km) per lightning flash. This work, by integrating SR measurements with satellite-based optical measurements of global flash rate, accomplishes this quantification for the first time. To do this, we first fit the intensity spectra of the observed SR signals to an eight-mode, three parameter per mode, (symmetric) Lorentzian line shape model. Next, using the LIS/OTD lightning data and the normal mode equations for a uniform cavity model, we computed the expected climatological-daily-average intensity spectra. We then regressed the observed modal intensity values against the expected modal intensity values to find the best fit value of the global-average vertical charge moment change of a lightning flash (M) to be 41 C km per flash with a 99% confidence interval of +/- 3.9 C km per flash, independent of mode. Mode independence argues that the model adequately captured the modal intensity, the most important fit parameter herein considered. We also tested this relationship for the presence of residual modal intensity at zero lightning flashes per second and found no evidence that modal intensity is significantly different than zero at zero lightning flashes per second, setting an upper limit to the amount of nonlightning contributions to the observed modal intensity. |
英文关键词 | Schumann resonances global lightning modeling normal mode equations Earth-ionosphere cavity |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000423433500007 |
WOS关键词 | PROPAGATION PARAMETERS ; ELF ; FREQUENCY ; MODELS |
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/33779 |
专题 | 气候变化 |
作者单位 | 1.Zayed Univ, Coll Nat & Hlth Sci, Dubai, U Arab Emirates; 2.MIT, Parsons Lab, 77 Massachusetts Ave, Cambridge, MA 02139 USA; 3.Tripura Univ, Dept Phys, Agartala, India |
推荐引用方式 GB/T 7714 | Boldi, Robert,Williams, Earle,Guha, Anirban. Determination of the Global-Average Charge Moment of a Lightning Flash Using Schumann Resonances and the LIS/OTD Lightning Data[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(1):108-123. |
APA | Boldi, Robert,Williams, Earle,&Guha, Anirban.(2018).Determination of the Global-Average Charge Moment of a Lightning Flash Using Schumann Resonances and the LIS/OTD Lightning Data.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(1),108-123. |
MLA | Boldi, Robert,et al."Determination of the Global-Average Charge Moment of a Lightning Flash Using Schumann Resonances and the LIS/OTD Lightning Data".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.1(2018):108-123. |
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