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DOI | 10.1029/2018JD028814 |
Acoustical Measurement of Natural Lightning Flashes: Reconstructions and Statistical Analysis of Energy Spectra | |
Lacroix, Arthur1,2,3; Farges, Thomas3; Marchiano, Regis1,2; Coulouvrat, Francois1,2 | |
2018-11-16 | |
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:21页码:12040-12065 |
文章类型 | Article |
语种 | 英语 |
国家 | France |
英文摘要 | Twenty-seven natural flashes of three thunderstorms which occurred during October 2012 in Southern France are acoustically reconstructed and analyzed in the [0.1-180]-Hz frequency bandwidth and the [0.3-20]-kmdistance range. A 50-m triangular array of four recalibrated microphones sampled at 500 Hz has been used for the recording. A novel method of separation of return strokes from intracloud discharges within the acoustical signal is detailed and systematically applied. It shows the possibility to separate nearby cloud-to-ground (CG) events or nearby and distant CGs of the same flash. The separation method yields a total of 36 return stroke signals and spectra, along with some intracloud signals. The combination of reconstruction, separation, and frequency analysis provides new insights on the origin of thunder infrasound, showing unambiguously that thunder infrasound originate dominantly from return strokes. Apart from the higher amplitude of CGs, no clear difference between intracloud and CG spectra is observed. No sharp frequency peaks can be put into evidence. The spectral variability with distance is highlighted, especially for the total acoustic energy and the center frequency and bandwidth. A link between acoustic energy and impulse charge moment change is also found, though only by a small number of data. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000452001400016 |
WOS关键词 | RETURN-STROKE ; SHOCK-WAVE ; POWER SPECTRUM ; DISCHARGES ; THUNDER ; LOCATION ; SYSTEM ; PEAK ; PROPAGATION ; INFRASOUND |
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/34354 |
专题 | 气候变化 |
作者单位 | 1.Sorbonne Univ, Inst Jean Le Rond dAlembert, Paris, France; 2.CNRS, Paris, France; 3.CEA, DAM, DIF, Arpajon, France |
推荐引用方式 GB/T 7714 | Lacroix, Arthur,Farges, Thomas,Marchiano, Regis,et al. Acoustical Measurement of Natural Lightning Flashes: Reconstructions and Statistical Analysis of Energy Spectra[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(21):12040-12065. |
APA | Lacroix, Arthur,Farges, Thomas,Marchiano, Regis,&Coulouvrat, Francois.(2018).Acoustical Measurement of Natural Lightning Flashes: Reconstructions and Statistical Analysis of Energy Spectra.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(21),12040-12065. |
MLA | Lacroix, Arthur,et al."Acoustical Measurement of Natural Lightning Flashes: Reconstructions and Statistical Analysis of Energy Spectra".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.21(2018):12040-12065. |
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