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Title: Observations of narrow bipolar events reveal how lightning is initiated in thunderstorms

Journal Article · · Nature Communications
DOI:https://doi.org/10.1038/ncomms10721· OSTI ID:1259285
 [1];  [1];  [1];  [1];  [2];  [1];  [1];  [3]
  1. New Mexico Institute of Mining and Technology, Socorro, NM (United States). Langmuir Laboratory for Atmospheric Research
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Chinese Academy of Meteorological Sciences, Beijing (China). Laboratory of Lightning Physics and Protection Engineering

A long-standing but fundamental question in lightning studies concerns how lightning is initiated inside storms, given the absence of physical conductors. The issue has revolved around the question of whether the discharges are initiated solely by conventional dielectric breakdown or involve relativistic runaway electron processes. Here we report observations of a relatively unknown type of discharge, called fast positive breakdown, that is the cause of high-power discharges known as narrow bipolar events. We find that the breakdown has a wide range of strengths and is the initiating event of numerous lightning discharges. It appears to be purely dielectric in nature and to consist of a system of positive streamers in a locally intense electric field region. It initiates negative breakdown at the starting location of the streamers, which leads to the ensuing flash. The observations show that many or possibly all lightning flashes are initiated by fast positive breakdown.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE; National Science Foundation (NSF); Defense Advanced Research Projects Agency (DARPA)
Grant/Contract Number:
HR0011-10-1-0057; HR0011-10-1-0059; AGS-1205727; HQ0147-08-C- 0025
OSTI ID:
1259285
Journal Information:
Nature Communications, Vol. 7; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 178 works
Citation information provided by
Web of Science

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Cited By (37)

Characteristics of Lightning Flashes Associated With the Charge Layer Near the 0 °C Isotherm in the Stratiform Region of Mesoscale onvective Systems journal September 2018
Spontaneous emergence of space stems ahead of negative leaders in lightning and long sparks text January 2019
Lightning Mapping Array flash detection performance with variable receiver thresholds: LMA FLASH DETECTION PERFORMANCE journal July 2016
The initial stage of cloud lightning imaged in high-resolution text January 2020
Very High Frequency Radio Emissions Associated With the Production of Terrestrial Gamma-Ray Flashes journal February 2018
Characteristics of Radio Emissions Associated With Terrestrial Gamma-Ray Flashes journal July 2018
Formation of decimeter-scale, long-lived elevated ionic conductivity regions in thunderclouds journal December 2019
Lightning Sferics: Analysis of the Instantaneous Phase and Frequency Inferred From Complex Waveforms journal April 2018
Spontaneous Emergence of Space Stems Ahead of Negative Leaders in Lightning and Long Sparks journal April 2019
A study of the context in which compact intracloud discharges occur journal August 2019
Modeling lightning observations from space-based platforms (CloudScat.jl 1.0) journal June 2020
Variable phase propagation velocity for long-range lightning location system: Variable Velocity for Lightning Location journal November 2016
Initiation and propagation of cloud-to-ground lightning observed with a high-speed video camera journal December 2016
Characteristics and Discharge Processes of M Events With Large Current in Triggered Lightning journal August 2018
Lightning initiation: Strong pulses of VHF radiation accompany preliminary breakdown journal February 2018
Observations of Blue Discharges Associated With Negative Narrow Bipolar Events in Active Deep Convection journal March 2018
Radio emissions from double RHESSI TGFs journal July 2016
Initial Breakdown Pulses Accompanied by VHF Pulses During Negative Cloud‐to‐Ground Lightning Flashes journal May 2019
ISUAL-Observed Blue Luminous Events: The Associated Sferics journal April 2018
Development of Side Bidirectional Leader and Its Effect on Channel Branching of the Progressing Positive Leader of Lightning journal February 2019
Measuring Method for Lightning Channel Temperature journal September 2016
Gamma Ray Showers Observed at Ground Level in Coincidence With Downward Lightning Leaders journal July 2018
A model of preliminary breakdown pulse peak currents and their relation to the observed electric field pulses: A MODEL OF PBP PEAK CURRENTS journal January 2017
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Time Correlations of Lightning Flash Sequences in Thunderstorms Revealed by Fractal Analysis journal January 2018
Initial Breakdown Pulse Parameters in Intracloud and Cloud-to-Ground Lightning Flashes journal February 2018
Electron density measurement of a lightning stepped leader by oxygen spectral lines journal August 2018
Properties of Negative Initial Leaders and Lightning Flash Size in a Cluster of Supercells journal November 2018
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Variations of Thunderstorm Charge Structures in West Texas on 4 June 2012: VARIATIONS OF THUNDERSTORM CHARGING journal September 2018
Initial electric field changes of lightning flashes in two thunderstorms: IECs of Lightning Flashes in Two Storms journal April 2017

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