DOI: 10.1002/2017JA024793
Scopus记录号: 2-s2.0-85045755529
论文题名: ISUAL-Observed Blue Luminous Events: The Associated Sferics
作者: Chou J.-K. ; Hsu R.-R. ; Su H.-T. ; Chen A.B.-C. ; Kuo C.-L. ; Huang S.-M. ; Chang S.-C. ; Peng K.-M. ; Wu Y.-J.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 4 起始页码: 3063
结束页码: 3077
语种: 英语
英文关键词: ISUAL
; jets
; narrow bipolar events
英文摘要: The blue luminous events (BLEs) recorded by ISUAL (Imager of Sprites and Upper Atmospheric Lightning) radiate unambiguous middle ultraviolet to blue emissions (230–450 nm) but contain dim red emissions (623–754 nm). The BLE appears to be dot-like on one ISUAL image with an integration time of 29 ms. A few BLEs develop upward into blue jets/starters or type II gigantic jets (GJs). The associated sferics of the BLEs in the extremely low frequency to very low frequency band and in the low-frequency band exhibit similar patterns to the narrow bipolar events (NBEs) identified in the very low frequency and low-frequency band. The ISUAL BLEs are conjectured to be the accompanied light emissions of the NBEs. Both upward and downward propagating current obtained from the associated sferics of the BLEs have been found. The source heights of the six BLEs related to negative NBEs are estimated in the range of 16.2–17.8 km. These six events are suggested to occur between the upper positive charge layer and the negative screen charge layer on the top of the normally electrified thunderstorm. The six blue starters, one blue jet, and one type II GJ are inferred to be positive upward discharges from their associated sferics in the extremely low frequency to very low frequency band. Based on the simultaneous radio and optical observations, a NBE is conjectured to be the initiation discharge with rapidly flowing current within the thunderstorm, while a blue jet/starter or a type II GJ is suggested to be the ensuing discharge with slowly varying current propagating upward from the thunderstorm. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114149
Appears in Collections: 气候减缓与适应
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作者单位: Department of Physics, National Cheng Kung University, Tainan, Taiwan; Institute of Space and Plasma Sciences, National Cheng Kung University, Tainan, Taiwan; Institute of Space Science, National Central University, Jhongli, Taiwan; Now at Space Sciences Laboratory, University of California, Berkeley, CA, United States
Recommended Citation:
Chou J.-K.,Hsu R.-R.,Su H.-T.,et al. ISUAL-Observed Blue Luminous Events: The Associated Sferics[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(4)