A Rocket‐Triggered Lightning Flash Containing Negative‐Positive‐Negative Current Polarity Reversal during its Initial Stage

2021 ◽  
Author(s):  
Fengquan Li ◽  
Zhuling Sun ◽  
Rubin Jiang ◽  
Guoying Tang ◽  
Mingyuan Liu ◽  
...  
Keyword(s):  
Polarity Reversal ◽  
Lightning Flash ◽  
Negative Current ◽  
Initial Stage ◽  
Triggered Lightning ◽  
Current Polarity

scholarly journals Leader-chasing behavior in negative artificial triggered lightning flashes

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Fukun Wang ◽  
Jianguo Wang ◽  
Li Cai ◽  
Rui Su ◽  
Wenhan Ding ◽  
...  
Keyword(s):  
High Speed ◽  
The Other ◽  
Lightning Flash ◽  
High Speed Camera ◽  
Return Stroke ◽  
Catching Up ◽  
Special Cases ◽  
Triggered Lightning

AbstractTwo special cases of dart leader propagation were observed by the high-speed camera in the leader/return stroke sequences of a classical triggered lightning flash and an altitude-triggered lightning flash, respectively. Different from most of the subsequent return strokes preceded by only one leader, the return stroke in each case was preceded by two leaders occurring successively and competing in the same channel, which herein is named leader-chasing behavior. In one case, the polarity of the latter leader was opposite to that of the former leader and these two combined together to form a new leader, which shared the same polarity with the former leader. In the other case, the latter leader shared the same polarity with the former leader and disappeared after catching up with the former leader. The propagation of the former leader in this case seems not to be significantly influenced by the existence of the latter leader.

scholarly journals Observations of stepping mechanisms in a rocket-and-wire triggered lightning flash

2010 ◽  
Vol 115 (D23) ◽  
Author(s):  
C. J. Biagi ◽  
M. A. Uman ◽  
J. D. Hill ◽  
D. M. Jordan ◽  
V. A. Rakov ◽  
...  
Keyword(s):  
Lightning Flash ◽  
Triggered Lightning

scholarly journals Characterization of the initial stage of negative rocket-triggered lightning

1999 ◽  
Vol 104 (D4) ◽  
pp. 4213-4222 ◽  
Author(s):  
D. Wang ◽  
V. A. Rakov ◽  
M. A. Uman ◽  
M. I. Fernandez ◽  
K. J. Rambo ◽  
...  
Keyword(s):  
Initial Stage ◽  
Triggered Lightning

Upward negative leaders in positive triggered lightning: Stepping and branching in the initial stage

2017 ◽  
Vol 44 (13) ◽  
pp. 7029-7035 ◽  
Author(s):  
Yunjiao Pu ◽  
Rubin Jiang ◽  
Xiushu Qie ◽  
Mingyuan Liu ◽  
Hongbo Zhang ◽  
...  
Keyword(s):  
Initial Stage ◽  
Triggered Lightning

scholarly journals An “anomalous” triggered lightning flash in Florida

2013 ◽  
Vol 118 (8) ◽  
pp. 3402-3414 ◽  
Author(s):  
W. R. Gamerota ◽  
M. A. Uman ◽  
J. D. Hill ◽  
J. Pilkey ◽  
T. Ngin ◽  
...  
Keyword(s):  
Lightning Flash ◽  
Triggered Lightning

scholarly journals Evolution Characteristics during Initial Stage of Triggered Lightning Based on Directly Measured Current

Atmosphere ◽  
2020 ◽  
Vol 11 (6) ◽  
pp. 658
Author(s):  
Zefang Chen ◽  
Yang Zhang ◽  
Yanfeng Fan ◽  
Jingxuan Wang ◽  
Dong Zheng ◽  
...  
Keyword(s):  
Lightning Discharge ◽  
Ground Level ◽  
Current Data ◽  
Discharge Process ◽  
Measured Current ◽  
Critical Range ◽  
Initial Stage ◽  
Evolution Characteristics ◽  
Triggered Lightning ◽  
Initial Process

The initiation of a leader is an important lightning discharge process, but how an upward positive leader (UPL) initiates is still not fully understood. The evolution characteristics of a UPL during its initial stage was systematically studied based on directly measured current data of 14 triggered lightning events in 2019. It was found that the initial stage of triggered lightning can be divided into two types: a single initial process form and a multiple initial process form, with percentages of 64.29% and 35.71%, respectively. Compared with the former, the latter usually lasts longer, and the corresponding lightning is often triggered under a lower ground-level quasi-static electric field. In each initial process, precursor current pulses (PCPs), PCP clusters and initial precursor current pulse (IPCPs) are typical current waveforms, and the pulse durations and transferred charges of PCPs increase linearly with time. However, in the multiple initial process form, the pulse durations and transferred charges of PCPs will reduce significantly after each previous initial process and then continue to increase in the following initial process. In each initial process, when the pulse duration and transferred charge of a PCP increase to a certain extent, PCP clusters and IPCPs begin to appear. For the emergence of PCP clusters, the average values of the threshold are 3.48 μs and 19.53 μC, respectively. For the occurrence of IPCPs, the corresponding values are 4.69 μs and 27.23 μC, respectively. The average values of pulse durations and transferred charges of IPCPs are larger than those of PCP clusters. Compared with adjacent PCP clusters, IPCPs contain more pulses, with a critical range of 6–7. IPCPs also last longer, and have a critical range of 138–198 μs.

Sign in / Sign up

Export Citation Format

Share Document