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DOI | 10.1002/2016JD026419 |
Triggered lightning spectroscopy: Part 1. A qualitative analysis | |
Walker, T. Daniel; Christian, Hugh J. | |
2017-08-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:15 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The first high-speed spectra of triggered lightning have been obtained. During the summers of 2012 and 2013, spectra were recorded at the International Center for Lightning Research and Testing, Camp Blanding, FL. The spectra were recorded with a high-speed camera with a grism mounted in front of it. The triggered lightning channels observed were generally at low altitude in a region that included the copper wire. Spectral emissions were recorded at each phase: the initial stage, dart leader, return stroke, and continuing current. These spectra are separated into two major regions: soft ultraviolet to visible (3800-6200 angstrom) and visible to near infrared (6200-8700 angstrom). The emissions during the initial stage reflect those of a copper wire burn in air. The majority of the emissions are neutral copper. After the initial stage comes the first return stroke which contains no detected molecular emissions; however, it does contain neutral, singly, and doubly ionized nitrogen and oxygen, neutral argon, and neutral hydrogen. Occasionally, before a return stroke, the dart leader coming down the channel will be stepped. During these occasions the leader spectra resemble that of the return stroke but are dimmer and shorter lived. After the initial portion of the return stroke, there are often changes in the luminosity of the spectrum which corresponds with fluctuations in the continuing current. During these reillumination phases no singly or doubly ionized lines have been observed to reemerge over the detection threshold, only neutral emission features. |
英文关键词 | lightning spectroscopy triggered lightning high-speed camera |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000408349500018 |
WOS关键词 | PHASE HOLOGRAPHIC GRATINGS ; RETURN STROKE ; QUANTITATIVE-ANALYSIS ; PEAK TEMPERATURE ; TIME ; SPECTRUM |
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/33561 |
专题 | 气候变化 |
作者单位 | Univ Alabama, Earth Syst Sci Ctr, Huntsville, AL 35899 USA |
推荐引用方式 GB/T 7714 | Walker, T. Daniel,Christian, Hugh J.. Triggered lightning spectroscopy: Part 1. A qualitative analysis[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(15). |
APA | Walker, T. Daniel,&Christian, Hugh J..(2017).Triggered lightning spectroscopy: Part 1. A qualitative analysis.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(15). |
MLA | Walker, T. Daniel,et al."Triggered lightning spectroscopy: Part 1. A qualitative analysis".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.15(2017). |
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