Experimental Radial Profiles of Early Time (&lt;4 μs) Neutral and Ion Spectroscopic Signatures in Lightning‐Like Discharges

Passas-Varo, María; Gordillo‐Vázquez, F. J.; Sánchez, Javier; Kieu, N.

doi:10.1029/2022jd036553

Cited by 2 publications

(2 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Using GALIUS, Passas‐Varo et al. (2022) performed radial‐resolved spectroscopy of laboratory‐generated lightning‐like discharges in air, finding the radial profiles of the electron/gas temperature (10,000–34,000 K) and electron density (2 × 10 16 cm −3 to 2 × 10 18 cm −3 ). Kieu et al.…”

Section: Introductionmentioning

confidence: 99%

“…Kieu et al (2020) recorded sub microsecond high-resolution time-resolved spectra (645-665 nm) in laboratory-produced lightning-like discharges using the GrAnada LIghtning Ultrafast Spectrograph (GALIUS), and reported the maximum electron density and gas temperature. Using GALIUS, Passas-Varo et al (2022) performed radial-resolved spectroscopy of laboratory-generated lightning-like discharges in air, finding the radial profiles of the electron/gas temperature (10,000-34,000 K) and electron density (2 × 10 16 cm 3 to 2 × 10 18 cm 3 ). Kieu et al (2021) investigated electron densities and temperatures derived from different sets of neutral and ionic lines.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Spectral Study of Rare Upward Developing, Circling, and Branching Cloud‐To‐Ground Lightning

Xu,

Gou,

Yuan

et al. 2024

JGR Atmospheres

View full text Add to dashboard Cite

The development of cloud‐to‐ground (CG) lightning channel is one of the main bases reflecting the discharge characteristics. Time‐resolved spectra of CG lightning with eight return strokes were recorded by a slit‐less high‐speed spectroscope. We found an unusual phenomenon in which a branch developed upward from a node following a circling structure into the cloud after the first return stroke. To investigate the propagation properties of this lightning, characteristic parameters such as the two‐dimensional speed of the leader, node temperature, and electron density are analyzed. The physical mechanism of the branch is discussed. Spectral analysis reveals that the main channel temperature and electron density are approximately 2.72–3.07 × 104 K and 0.23–2.03 × 1018 cm−3, respectively. The temperature and electron density increase as the branch approaches the cloud base, similar to the feature of the main channel approaching the ground. The temperature and electron density of the node are higher than at other locations in the circular channel, indicating that massive charge accumulated around the node. Lightning occurred in the Qilian Mountains in a complex landscape, which easily yielded an uneven distribution in the local electric field of the air, resulting in channel bending, kinking, and even circle development. The phenomenon of the branch developed from the node to the cloud may be due to the fact that the branch is formed during the return stroke process.

show abstract

Section: Introductionmentioning

confidence: 99%