The start of lightning: Evidence of bidirectional lightning initiation. [PDF]
Sci Rep, 2015 AbstractLightning flashes are known to initiate in regions of strong electric fields inside thunderstorms, between layers of positively and negatively charged precipitation particles. For that reason, lightning inception is typically hidden from sight of camera systems used in research.
Montanyà J +2 more
europepmc +9 more sources
On the initiation of lightning in thunderclouds [PDF]
Scientific Reports, 2017 The relationship of lightning and elementary particle fluxes in the thunderclouds is not fully understood to date. Using the particle beams (the so-called Thunderstorm Ground Enhancements – TGEs) as a probe we investigate the characteristics of the ...
Ashot Chilingarian +7 more
doaj +8 more sources
On the Initiation of Upward Negative Lightning by Nearby Lightning Activity: An Analytical Approach [PDF]
Journal of Geophysical Research D: Atmospheres, 2021 AbstractUpward lightning occurs generally from tall structures. The mechanism of the initiation of upward lightning is not yet fully understood. Upward lightning can be classified into two categories based on either the absence or the presence of other lightning activity prior to the upward flash.
Vernon Cooray +2 more
exaly +4 more sources
Upgraded Low-Frequency 3D Lightning Mapping System in North China and Observations on Lightning Initiation Processes [PDF]
Remote SensingThe three-dimensional (3D) low-frequency lightning mapping system (LF-LMS) in north China has been updated. The lightning electric field derivative (dE/dt) sensor and continuous acquisition mode has been newly designed to ensure a capability of entire ...
Zhuling Sun +2 more
exaly +4 more sources
The Spontaneous Nature of Lightning Initiation Revealed [PDF]
Geophysical Research Letters, 2021 Here, we present new radio interferometer beamforming observations of lightning initiation using data from the Low-Frequency Array (LOFAR). We show that the first lightning source in the flash increases exponentially in intensity by two orders of magnitude in 15 μs, while propagating 88 m away from the initiation location at a constant speed of 4.8 ± 0.
Brian Hare, Anna Nelles, Joseph Dwyer
exaly +6 more sources
Numerical Simulation of the Lightning Leader Development and Upward Leader Initiation for Rotating Wind Turbine [PDF]
Machines, 2022 Lightning accidents seriously threaten safe operation of wind turbines because the influence mechanisms of wind turbine rotation on corona and upward leader initiation are, so far, not clear.
Wanshui Yu +3 more
doaj +3 more sources
Lightning initiation: Strong pulses of VHF radiation accompany preliminary breakdown [PDF]
Scientific Reports, 2018 We analyze lightning initiation process using magnetic field waveforms of preliminary breakdown (PB) pulses observed at time scales of a few tens of microseconds by a broad-band receiver.
Ivana Kolmašová +11 more
doaj +2 more sources
Indirectly Measured Ambient Electric Fields for Lightning Initiation in Fast Breakdown Regions
Geophysical Research Letters, 2020 We report a new approach to measure indirectly the ambient thunderstorm electric fields in fast positive breakdown regions. For a given geometry of the discharged fast breakdown region, we show that there is a minimum ambient electric field required to ...
Steven Cummer
exaly +2 more sources
Ultra‐Slow Discharges That Precede Lightning Initiation
Geophysical Research Letters, 2022 We report on ultra-slowly propagating discharge events with speeds in the range 1-13 km/s, much lower than any known lightning process. The propagation speeds of these discharges are orders of magnitude slower than leader or streamer speeds, but faster than the ion drift speed. For one particular event, a lightning leader forms about 40 ms later within
Brian Hare, Joseph Dwyer, Ningyu Liu
exaly +3 more sources
Characteristics of Regions with High-Density Initiation of Flashes in Mesoscale Convective Systems
Remote Sensing, 2022 To investigate the characteristics of regions exhibiting multiple lightning initiations within a finite volume and a short time, the lightning location data obtained from the convective regions of 14 mesoscale convective systems were analyzed in ...
Fei Wang +5 more
doaj +1 more source