ISUAL-Observed Blue Luminous Events: The Associated Sferics

Jung Kuang Chou, Rue Ron Hsu, Han Tzong Su, Alfred Bing Chih Chen, Cheng Ling Kuo, Sung Ming Huang, Shu Chun Chang, Kang Ming Peng, Yen Jung Wu

研究成果: 雜誌貢獻期刊論文同行評審

23 引文 斯高帕斯(Scopus)


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.

頁(從 - 到)3063-3077
期刊Journal of Geophysical Research: Space Physics
出版狀態已出版 - 4月 2018


深入研究「ISUAL-Observed Blue Luminous Events: The Associated Sferics」主題。共同形成了獨特的指紋。