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On the role of continuing currents in lightning-induced fire ignition

Perez-Invernon, Francisco Javier and Moris, Jose V. and Gordillo-Vazquez, Francisco J. and Füllekrug, Martin and Pezzatti, Gianni and Conedera, Marco and Lapierre, Jeff and Huntrieser, Heidi (2023) On the role of continuing currents in lightning-induced fire ignition. Journal of Geophysical Research: Atmospheres. Wiley. doi: 10.1029/2023JD038891. ISSN 2169-897X.

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Official URL: https://agupubs.onlinelibrary.wiley.com/journal/21698996

Abstract

Lightning flashes are an important source of wildfires worldwide, contributing to the emission of trace gases to the atmosphere. Based on experiments and field observation, continuing cur rents in lightning have since a long time been proposed to play a significant role in the ignition of wildfires. However, simultaneous detections of optical and radio signals from fire-igniting lightning confirming the role of continuing currents in igniting wildfires are rare. In this work, we first analyze the optical signal of the lightning-ignited wildfires reported by the Geostationary Lightning Mapper over the Contiguous United States (CONUS) during the summer of 2018, and we then analyze the optical and the Extremely Low Frequency signal of a confirmed fire-igniting lightning flash in the Swiss Alps. Despite data uncertainties, we found that the probability of ignition of a lightning flash with Continuing Current (CC) lasting more than 10 ms is higher than that of cloud-to-ground lightning in CONUS. Finally, we confirm the existence of a long continuing current (lasting about 400 ms) associated with a long-lasting optical signal (lasting between 2 and 4 s) of a video-recorded fire-igniting lightning flash.

Item URL in elib:https://elib.dlr.de/198594/
Document Type:Article
Title:On the role of continuing currents in lightning-induced fire ignition
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Perez-Invernon, Francisco JavierIAA, CSIC, Granada, SpainUNSPECIFIEDUNSPECIFIED
Moris, Jose V.University of Torino, Grugliasco, ItalyUNSPECIFIEDUNSPECIFIED
Gordillo-Vazquez, Francisco J.IAA, CSIC, Granada, Spainhttps://orcid.org/0000-0003-2905-3854UNSPECIFIED
Füllekrug, MartinUniversity of Bath, Bath, UKUNSPECIFIEDUNSPECIFIED
Pezzatti, GianniWSL, Cadenazzo, SwitzerlandUNSPECIFIEDUNSPECIFIED
Conedera, MarcoWSL, Cadenazzo, SwitzerlandUNSPECIFIEDUNSPECIFIED
Lapierre, JeffEarth Networks, Germantown, MD, USAUNSPECIFIEDUNSPECIFIED
Huntrieser, HeidiDLR, IPAhttps://orcid.org/0000-0001-8046-1859UNSPECIFIED
Date:27 October 2023
Journal or Publication Title:Journal of Geophysical Research: Atmospheres
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI:10.1029/2023JD038891
Publisher:Wiley
ISSN:2169-897X
Status:Published
Keywords:lightning, wildfires, long continuent currents
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Air Transportation and Impact
DLR - Research area:Aeronautics
DLR - Program:L AI - Air Transportation and Impact
DLR - Research theme (Project):L - Climate, Weather and Environment
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Trace Species
Deposited By: Huntrieser, Dr.rer.nat. Heidi
Deposited On:03 Nov 2023 10:53
Last Modified:29 Jan 2024 12:57

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