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Combined Optical and Radio-Frequency Measurements of a Lightning Megaflash by the FORTE Satellite

Journal Article · · Journal of Geophysical Research: Atmospheres
DOI:https://doi.org/10.1029/2020JD034411· OSTI ID:1866948
 [1];  [1];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
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The optical and VHF instrumentation on the Fast On-Orbit Recording of Transient Events (FORTE) satellite is used to document the combined phenomenology evolution of a lightning “megaflash” – mesoscale lightning that propagates laterally over exceptional distances. We identify a FORTE flash whose maximum extent was 82 km and inferred length over multiple distinct branches exceeded 100 km. This flash lasted 1.2 s and produced 250 optical and 591 RF events. We find that the channel development mapped by FORTE’s pixelated lightning imager (LLS) occurred at a typical speed of 2.6x105 m s-1 and was accompanied by sustained periods of VHF emission that could individually exceed 100 ms in duration. The impulsive IC events generated by the flash indicate that this development occurred at altitudes between 3 and 8 km. Four +CG strokes were identified in the VHF waveform data that are responsible for two of the three highly-radiant LLS groups (two of the +CGs were not as optically bright as the others). These strokes occurred at different locations throughout the flash footprint with the most distant strokes separated by approximately 50 km. These space-based observations match previous observations of megaflashes as well as ground-based measurements of negative leader development during “spider” lightning, suggesting that FORTE is sensing the same phenomena.
Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
89233218CNA000001
OSTI ID:
1866948
Alternate ID(s):
OSTI ID: 1810208
Report Number(s):
LA-UR-20-30147
Journal Information:
Journal of Geophysical Research: Atmospheres, Journal Name: Journal of Geophysical Research: Atmospheres Journal Issue: 15 Vol. 126; ISSN 2169-897X
Publisher:
American Geophysical UnionCopyright Statement
Country of Publication:
United States
Language:
English

References (46)

Asymmetries in bidirectional leader development of lightning flashes: ASYMMETRIES OF LEADERS IN LIGHTNING journal December 2013
The properties of optical lightning flashes and the clouds they illuminate: Optical Lightning and Illuminated Clouds journal January 2017
Global distribution and properties of continuing current in lightning: GLOBAL CONTINUING CURRENT LIGHTNING journal January 2017
The Evolution and Structure of Extreme Optical Lightning Flashes: Optical Lightning Flash Extremes journal December 2017
The GOES-R Geostationary Lightning Mapper (GLM) journal May 2013
FORTE observations of lightning radio-frequency signatures: Capabilities and basic results journal March 1999
Comparison of ground-based 3-dimensional lightning mapping observations with satellite-based LIS observations in Oklahoma journal June 2000
A GPS-based three-dimensional lightning mapping system: Initial observations in central New Mexico journal December 1999
FORTE observations of simultaneous VHF and optical emissions from lightning: Basic phenomenology journal January 2000
FORTE radio-frequency observations of lightning strokes detected by the National Lightning Detection Network journal June 2000
Coincident radio frequency and optical emissions from lightning, observed with the FORTE satellite journal November 2001
Simulations of lightning optical waveforms as seen through clouds by satellites journal August 2001
Coordinated observations of optical lightning from space using the FORTE photodiode detector and CCD imager journal August 2001
Global frequency and distribution of lightning as observed from space by the Optical Transient Detector journal January 2003
Lightning location relative to storm structure in a leading-line, trailing-stratiform mesoscale convective system journal January 2005
Origins of positive cloud-to-ground lightning flashes in the stratiform region of a mesoscale convective system: POSITIVE CLOUD-TO-GROUND LIGHTNING FLASHES journal May 2004
Radio frequency radiation beam pattern of lightning return strokes: Inferred from FORTE satellite observations journal January 2005
Kinematic, microphysical, and electrical aspects of an asymmetric bow-echo mesoscale convective system observed during STEPS 2000 journal January 2008
Performance assessment of the Optical Transient Detector and Lightning Imaging Sensor journal January 2007
Evolution of the total lightning structure in a leading-line, trailing-stratiform mesoscale convective system over Houston, Texas journal January 2008
Electrical evolution during the decay stage of New Mexico thunderstorms journal January 2009
Global statistics of lightning in anvil and stratiform regions over the tropics and subtropics observed by the Tropical Rainfall Measuring Mission: ANVIL AND STRATIFORM FLASH STATISTICS journal December 2011
Lightning leader stepping, K changes, and other observations near an intracloud flash: LIGHTNING LEADER STEPPING journal December 2011
Mapping the Lateral Development of Lightning Flashes From Orbit journal September 2018
The Time Evolution of Optical Lightning Flashes journal December 2018
First Observations of Gigantic Jets From Geostationary Orbit journal April 2019
Meteorological Imagery for the Geostationary Lightning Mapper journal December 2019
Research Applications for the Geostationary Lightning Mapper Operational Lightning Flash Data Product journal September 2019
A Retrospective of Findings From the FORTE Satellite Mission journal May 2020
Holes in Optical Lightning Flashes: Identifying Poorly Transmissive Clouds in Lightning Imager Data journal February 2021
New World Meteorological Organization Certified Megaflash Lightning Extremes for Flash Distance (709 km) and Duration (16.73 s) Recorded From Space journal August 2020
Modeling the Transmission of Optical Lightning Signals Through Complex 3‐D Cloud Scenes journal November 2020
Revisiting the Detection of Optical Lightning Superbolts journal November 2020
GLM Observations of the Brightest Lightning in the Americas journal November 2020
Combined Optical and Radio‐Frequency Perspectives on a Hybrid Cloud‐To‐Ground Lightning Flash Observed by the FORTE Satellite journal March 2021
Diffusion model for lightning radiative transfer journal January 1994
Satellite observations of transionospheric pulse pairs journal April 1995
“Spider” lightning in intracloud and positive cloud-to-ground flashes journal August 1998
The excitation temperature of lightning journal February 1963
The Effects of Clouds on the Light Produced by Lightning journal September 1982
Two Types of Vertical Electrical Structures in Stratiform Precipitation Regions of Mesoscale Convective Systems journal November 1993
Cloud-to-Ground Lightning Activity in the 10–11 June 1985 Mesoscale Convective System Observed during the Oklahoma–Kansas PRE-STORM Project journal July 1988
Horizontal Distribution of Electrical and Meteorological Conditions across the Stratiform Region of a Mesoscale Convective System journal August 1994
WMO World Record Lightning Extremes: Longest Reported Flash Distance and Longest Reported Flash Duration journal June 2017
Megaflashes: Just How Long Can a Lightning Discharge Get? journal October 2019
The Hazards Posed by Mesoscale Lightning Megaflashes journal January 2021

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