DOI: | 10.1002/2016JD025532
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论文题名: | Global distribution and properties of continuing current in lightning |
作者: | Bitzer P.M.
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刊名: | Journal of Geophysical Research: Atmospheres
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ISSN: | 2169897X
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出版年: | 2017
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卷: | 122, 期:2 | 起始页码: | 1033
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结束页码: | 1041
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语种: | 英语
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英文关键词: | atmospheric electricity
; continuing current
; GLM
; lightning
; LIS
; satellite
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Scopus关键词: | atmospheric electricity
; cloud to ground lightning
; numerical model
; satellite data
; sensor
; spatial distribution
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英文摘要: | Continuing current is a process in lightning in which the current in a conducting channel can flow for much longer than in a typical lightning discharge. The phenomenon can be characterized by the continuous optical emission that accompanies the current flow. Using the Lightning Imaging Sensor (LIS), lightning with continuing current is identified on a global scale. Lightning that contains optical emission over at least five consecutive LIS frames, roughly 7–9 ms, are classified as continuing current flashes. This differs from typical lightning discharges that produce optical emission for one or two consecutive frames. Of the flashes detected by LIS, 11.2% contain continuing current. These flashes optically radiate over a larger footprint and have a longer duration than ones that do not. The spatial distribution of these flashes indicates that regions of high lightning activity may not be correlated with a high likelihood of continuing current flashes. Further, oceanic and winter lightning are shown to have a higher proportion of continuing current flashes. Finally, 25–40% of flashes identified by LIS to have continuing current have only an intracloud pulse detected by the National Lightning Detection Network (NLDN), with no cloud-to-ground strokes detected. ©2016. American Geophysical Union. All Rights Reserved. |
资助项目: | NNM05AA22A
; Z7813005
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Citation statistics: |
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资源类型: | 期刊论文
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标识符: | http://119.78.100.158/handle/2HF3EXSE/62760
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Appears in Collections: | 影响、适应和脆弱性 气候减缓与适应
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作者单位: | Department of Atmospheric Science, University of Alabama in Huntsville, Huntsville, AL, United States
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Recommended Citation: |
Bitzer P.M.. Global distribution and properties of continuing current in lightning[J]. Journal of Geophysical Research: Atmospheres,2017-01-01,122(2)
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