Extension of lightning corona sheath model during return stroke

Cvetić, Jovan; Osmokrović, P.; Heidler, F.; Trifkovic, Z.

doi:10.1109/tdei.2011.6032806

Cited by 14 publications

(2 citation statements)

References 21 publications

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Section: Theoretical Basementioning

confidence: 99%

“…According to generally accepted theory, the lightning channel consists of a thick corona sheath surrounding the narrow channel core (Cvetic et al., 2011; Maslowski et al., 2009; Maslowski & Rakov, 2006). Besides, theoretical studies show that the conductivity of the corona sheath is of the order of 10 μS/m (Cvetic et al., 2011; Maslowski & Rakov, 2006), while that of the channel core is much higher and it is estimated to be 10 4 S/m. Experimentally, the channel core of a natural negative cloud‐to‐ground lightning was recorded by a slit‐less high‐speed spectrograph (Liu et al., 2019), which confirmed the corona sheath model of lightning channel.…”

Section: Theoretical Basementioning

confidence: 99%

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Evolution of Discharge Characteristics Along the Positive Cloud‐To‐Ground Lightning Channel

Pan

Chen

et al. 2021

JGR Atmospheres

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Two positive cloud‐to‐ground lightning spectra have been captured by a slit‐less spectrograph. In combination with the synchronous electric field change waveshape, the discharge characteristics along the channel have been investigated. The results show that the total intensity of ionic lines in spectra and the electrical conductivity increase with the increase of channel height. According to the positive correlation between the total intensity of ionic lines and the discharge current, it is found that the current intensity of downward positive cloud‐to‐ground lightning increases with the increase of channel height. Comparing it with the reported current attenuation along the channel of downward negative lightning, it is deduced that the increasing or decreasing of the current along the discharge channel is likely to be related to the current direction.

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