Spectral Observations of Optical Emissions Associated with Terrestrial Gamma-Ray Flashes

Heumesser, Matthias and Chanrion, Olivier and Neubert, Torsten and Christian, Hugh and Dimitriadou, Krystallia and Gordillo-Vazquez, Francisco J. and Luque, Alejandro and Pérez-Invernón, Francisco J. and Blakeslee, Richard J. and Østgaard, Nikolai and Reglero, Victor and Köhn, Christoph (2020) Spectral Observations of Optical Emissions Associated with Terrestrial Gamma-Ray Flashes. Geophysical Research Letters, n/a (n/a), e2020GL090700. Wiley. doi: 10.1029/2020GL090700. ISSN 0094-8276.

PDF - Postprint version (accepted manuscript)
5MB

Official URL: https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2020GL090700

Abstract

The Atmosphere-Space Interactions Monitor measures Terrestrial Gamma-Ray Flashes (TGFs) simultaneously with optical emissions from associated lightning activity. We analyzed optical measurements at 180-230 nm, 337 nm and 777.4 nm related to 69 TGFs observed between June 2018 and October 2019. All TGFs are associated with optical emissions and 90% of them are at the onset of a large optical pulse, suggesting that they are connected with the initiation of current surges. A model of photon delay induced by cloud scattering suggests that the sources of the optical pulses are from 0.7 ms before to 4.4 ms after the TGFs, with a median of -10±80 µs, and 1-5 km below the cloud top. The pulses have rise times comparable to lightning but longer durations. Pulse amplitudes at 337 nm are ∼3 times larger than at 777.4 nm. The results support the leader-streamer mechanism for TGF generation.

Item URL in elib:

https://elib.dlr.de/140853/

Document Type:

Article

Additional Information:

e2020GL090700 2020GL090700

Title:

Spectral Observations of Optical Emissions Associated with Terrestrial Gamma-Ray Flashes

Authors:

Authors	Institution or Email of Authors	Author's ORCID iD	ORCID Put Code
Heumesser, Matthias	DTU Space, Kongens Lyngby, Denmark	https://orcid.org/0000-0002-0079-6067	UNSPECIFIED
Chanrion, Olivier	DTU Space, Kongens Lyngby, Denmark	UNSPECIFIED	UNSPECIFIED
Neubert, Torsten	DTU Space, Kongens Lyngby, Denmark	UNSPECIFIED	UNSPECIFIED
Christian, Hugh	Univ. Alabama Huntsville, Alabama, USA	UNSPECIFIED	UNSPECIFIED
Dimitriadou, Krystallia	DTU Space, Kongens Lyngby, Denmark	UNSPECIFIED	UNSPECIFIED
Gordillo-Vazquez, Francisco J.	IAA, CSIC, Granada, Spain	https://orcid.org/0000-0003-2905-3854	UNSPECIFIED
Luque, Alejandro	IAA, CSIC, Granada, Spain	UNSPECIFIED	UNSPECIFIED
Pérez-Invernón, Francisco J.	DLR, IPA	https://orcid.org/0000-0003-2905-3854	UNSPECIFIED
Blakeslee, Richard J.	NASA Marshall Space Flight Center, Huntsville, Alabama, USA	UNSPECIFIED	UNSPECIFIED
Østgaard, Nikolai	University of Bergen, Bergen, Norway	UNSPECIFIED	UNSPECIFIED
Reglero, Victor	University of Valencia, Valencia, Spain	UNSPECIFIED	UNSPECIFIED
Köhn, Christoph	DTU Space, Kongens Lyngby, Denmark	UNSPECIFIED	UNSPECIFIED

Date:

29 December 2020

Journal or Publication Title:

Geophysical Research Letters

Refereed publication:

Yes

Open Access:

Yes

Gold Open Access:

In SCOPUS:

Yes

In ISI Web of Science:

Yes

Volume:

n/a

DOI:

10.1029/2020GL090700

Page Range:

e2020GL090700

Publisher:

Wiley

ISSN:

0094-8276

Status:

Published

Keywords:

ASIM, ISS, TGF, Cloud Optics, Streamer, Leader

HGF - Research field:

Aeronautics, Space and Transport

HGF - Program:

Space

HGF - Program Themes:

Space Transportation

DLR - Research area:

Raumfahrt

DLR - Program:

R RP - Space Transportation

DLR - Research theme (Project):

R - Raumfahrzeuge Entwurf, Systemanalyse, Simulation, Messtechnik (old)

Location:

Oberpfaffenhofen

Institutes and Institutions:

Institute of Atmospheric Physics > Atmospheric Trace Species

Deposited By:

Perez-Invernon, Francisco Javier

Deposited On:

09 Feb 2021 09:48

Last Modified:

24 Mar 2021 08:21

Repository Staff Only: item control page