Lightning Electric Field Characteristics Associated With Transmission-Line Faults in Winter

Ishii, Masaru; Saito, Mikihisa

doi:10.1109/temc.2009.2025496

Cited by 36 publications

(18 citation statements)

References 6 publications

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“…The high ratio of PCG lightning (100% for 12 November, 81% for 14 November, 38% for 2 December, and 66% for all three cases) and great positive peak current (medians of 39 kA for 12 November, 59 kA for 14 November, 78 kA for 2 December, and 67 kA for all three cases) and relatively frequent bipolar lightning (a total of three bipolar CG flashes) agreed with previous studies on the lightning characteristics in winter thunderstorms (Goto & Narita, 1995;Ishii & Saito, 2009;Narita et al, 1989;Shi et al, 2018;Suzuki, 1992;Takeuti et al, 1976;Wang et al, 2008). Compared with the LMA flashes (Table 1), the thunderstorm on 12 November had the lowest ratio of CG lightning (~6%), followed by 2 December (~32%), and 14 November (~52%).…”

Section: Cg Flash Datasupporting

confidence: 90%

Charge Regions Indicated by LMA Lightning Flashes in Hokuriku's Winter Thunderstorms

et al. 2019

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The charge distribution of some cells in three winter thunderstorms in the Hokuriku region of Japan is investigated based on Lightning Mapping Array (LMA) flash data. The vertical arrangements of charge regions involved in lightning discharges suggest diverse charge patterns, including quad‐polar, tripole, positive dipole, inverted dipole, and inverted tripole. The riming electrification between graupel and ice crystals or their aggregations are thought to be responsible for the electrification of most cells. The charging process between snow/aggregates and ice crystals may be responsible for some inverted charge structure that occurred above 0 °C isotherm and accompanied with weak radar echoes. Convection indicated by the vertical development of radar reflectivity appears crucial to shaping the diverse charge distribution patterns by determining which charging mechanisms occur and where; it also influences changes in height or even the disappearance of the charge regions. The charged cores are distributed from 0.7‐ to 5.3‐km heights and 2‐ to –31‐ °C temperatures, while the distances between adjacent charged cores with opposite polarities change between 0.2 and 3.4 km, with a mean of 1.3 km. The mean flash duration and horizontal distance are 425.0 ms and 19.8 km, respectively. The average height, temperature, and power of flash initiations are 2.8 km, −11.9 °C, and 15.6 dBW, respectively.

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Section: Cg Flash Datasupporting

confidence: 90%

Charge Regions Indicated by LMA Lightning Flashes in Hokuriku's Winter Thunderstorms

et al. 2019

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“…Upward flashes in winter have been observed from structures shorter than 100 m (Miki 2007), the waveforms of which are quite different from common returnstroke waveforms. Hence, the upward flashes are called ground-to-cloud (GC) flashes (Ishii and Saito 2009;Ishii et al 2010). Other interesting features of winter lightning are the frequent occurrence of bipolar flashes (Narita et al 1989), lightning flashes with multiple strike points (Takagi et al 1991), and single-stroke lightning flashes (i.e., low multiplicity) (Takeuti and Nakano 1983).…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional VHF Lightning Mapping System for Winter Thunderstorms

Nishihashi¹,

Shimose²,

Kusunoki

et al. 2013

Journal of Atmospheric and Oceanic Technology

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A three-dimensional (3D) winter lightning mapping system employing very high frequency (VHF) broadband signals was developed for continuous remote observation in winter. VHF broadband pulses radiated by leader progression are received with three discone antennas arranged in a triangle (20-30 m) and recorded on a high-speed digital oscilloscope (1.25-GHz sampling) with GPS digital timing data. The two-dimensional (2D) mapping for azimuth and elevation of the VHF radiation sources was conducted by computing the arrival time differences of three pulses using a cross-correlation technique. From azimuth and elevation data from two sites extracted within a given time frame, 3D lightning mapping was performed using the triangulation scheme. An observation network for winter lightning was constructed within a comprehensive meteorological observation network in the Shonai area, which is located on the coast of the Japan Sea. This report includes the preliminary 2D and 3D mapping of winter lightning observed on 3 December 2010. The horizontal and vertical distributions of VHF radiation sources were consistent with the radar echo observed with X-band Doppler radar. These results indicate that the system can detect winter lightning discharges and perform 2D and 3D lightning mapping in detail.

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“…Ishii et al [46] measured electric field waveforms produced by winter lightning in Japan. The waveforms were inferred to be associated with high-current discharges to transmission-line towers.…”

Section: ) Wideband Electric and Magnetic Fields Produced Bymentioning

confidence: 99%

Overview of Recent Progress in Lightning Research and Lightning Protection

Rakov

Rachidi

2009

IEEE Trans. Electromagn. Compat.

204

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Abstract-This review paper, prepared for this second special issue on lightning of the IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY, summarizes major publications on lightning and lightning protection since the first special issue published in November 1998, i.e., during the last decade. The review is organized in the following five sections: lightning discharge-observations, lightning discharge-modeling, lightning occurrence characteristics/lightning locating systems, lightning electromagnetic pulse and lightning-induced effects, and protection against lightning-induced effects.

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Lightning Electric Field Characteristics Associated With Transmission-Line Faults in Winter

Cited by 36 publications

References 6 publications

Charge Regions Indicated by LMA Lightning Flashes in Hokuriku's Winter Thunderstorms

Charge Regions Indicated by LMA Lightning Flashes in Hokuriku's Winter Thunderstorms

Three-Dimensional VHF Lightning Mapping System for Winter Thunderstorms

Overview of Recent Progress in Lightning Research and Lightning Protection

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