First time-resolved leader spectra associated with a downward terrestrial gamma-ray flash detected at the telescope array surface detector

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F24%3A00616677" target="_blank" >RIV/68378271:_____/24:00616677 - isvavai.cz</a>

Result on the web

<a href="https://hdl.handle.net/11104/0363651" target="_blank" >https://hdl.handle.net/11104/0363651</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1029/2024JD041720" target="_blank" >10.1029/2024JD041720</a>

Result language

angličtina

Original language name

First time-resolved leader spectra associated with a downward terrestrial gamma-ray flash detected at the telescope array surface detector

Original language description

Optical emissions associated with Terrestrial Gamma ray Flashes (TGFs) have recently become important subjects in space-based and ground-based observations as they can help us understand how TGFs are produced during thunderstorms. In this paper, we present the first time-resolved leader spectra of the optical component associated with a downward TGF. The TGF was observed by the Telescope Array Surface Detector (TASD) simultaneously with other lightning detectors, including a Lightning Mapping Array (LMA), an INTerFerometer (INTF), a Fast Antenna (FA), and a spectroscopic system. The spectroscopic system recorded leader spectra at 29,900 frames per second (33.44 μs time resolution), covering a spectral range from 400 to 900 nm, with 2.1 nm per pixel. The recordings of the leader spectra began 11.7 ms before the kA return stroke and at a height of 2.37 km above the ground. These spectra reveal that optical emissions of singly ionized nitrogen and oxygen occur between 167 μs before and 267 μs after the TGF detection, while optical emissions of neutrals (H I, 656 nm, N I, 744 nm, and O I, 777 nm) occur right at the moment of the detection. The time-dependent spectra reveal differences in the optical emissions of lightning leaders with and without downward TGFs.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

<a href="/en/project/EH22_008%2F0004632" target="_blank" >EH22_008/0004632: Fundamental constituents of matter through frontier technologies</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Geophysical Research-Atmospheres

ISSN

2169-897X

e-ISSN

2169-8996

Volume of the periodical

129

Issue of the periodical within the volume

24

Country of publishing house

US - UNITED STATES

Number of pages

13

Pages from-to

e2024JD041720

UT code for WoS article

001385737300001

EID of the result in the Scopus database

2-s2.0-85211619352