Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016JD026202 |
Triggered lightning sky waves, return stroke modeling, and ionosphere effective height | |
Carvalho, F. L.1; Uman, M. A.1; Jordan, D. M.1; Hill, J. D.2; Cummer, S. A.3; Kotovsky, D. A.1; Moore, R. C.1 | |
2017-03-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:6 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Ground waves and sky waves measured 209km and 250km south of six triggered lightning flashes containing 30 strokes that occurred in the half-hour before sunset on 27 August 2015 are presented and analyzed. We use a cross-correlation technique to find the ionospheric effective reflection height and compare our results to previous techniques that calculate effective height based on the time delay between ground wave and sky wave time domain features. From the first flash to the last flash there is, on average, a 1.6km increase in effective ionospheric height, whereas no change in effective ionospheric height can be discerned along the individual strokes of a given flash. We show to what extent the triggered lightning radiation source can be described (using channel-base current, channel geometry, and channel luminosity versus time and height) and speculate that a well-characterized source could allow a more accurate determination of the electromagnetic fields radiated toward the ionosphere than has been done to date. We show that both channel geometry and the change in return stroke current amplitude and waveshape with channel height (inferred from measured channel luminosity versus height and time) determine the waveshape of the ground wave (and presumably the upward propagating wave that results in the sky wave) and that the waveshape of the ground wave does not appear to be related to the current versus time waveform measured at the channel base other than a roughly linear relationship between the two peak values. |
英文关键词 | sky waves ionospheric reflection ground waves triggered lightning channel geometry return stroke modeling |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000399655200020 |
WOS关键词 | LONG RADIO-WAVES ; REFLECTION PROCESSES ; MAPPING ARRAY ; FIELDS ; PROPAGATION ; VLF ; FLASHES ; THUNDERSTORMS ; ATMOSPHERICS ; DISCHARGES |
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/33326 |
专题 | 气候变化 |
作者单位 | 1.Univ Florida, Dept Elect & Comp Engn, Gainesville, FL 32611 USA; 2.Sci Lightning Solut LLC, Titusville, FL USA; 3.Duke Univ, Dept Elect & Comp Engn, Durham, NC USA |
推荐引用方式 GB/T 7714 | Carvalho, F. L.,Uman, M. A.,Jordan, D. M.,et al. Triggered lightning sky waves, return stroke modeling, and ionosphere effective height[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(6). |
APA | Carvalho, F. L..,Uman, M. A..,Jordan, D. M..,Hill, J. D..,Cummer, S. A..,...&Moore, R. C..(2017).Triggered lightning sky waves, return stroke modeling, and ionosphere effective height.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(6). |
MLA | Carvalho, F. L.,et al."Triggered lightning sky waves, return stroke modeling, and ionosphere effective height".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.6(2017). |
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