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Properties and Generation of Large Scale Travelling Ionospheric Disturbances during 8 September 2017

Borries, Claudia and Ferreira, Arthur Amaral and Xiong, Chao and Borges, Renato Alves and Mielich, Jens and Kouba, Daniel (2020) Properties and Generation of Large Scale Travelling Ionospheric Disturbances during 8 September 2017. EGU General Assembly 2020, 4.-08. Mai 2020, Online. doi: 10.5194/egusphere-egu2020-18107.

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Abstract

Large Scale Travelling Ionospheric Disturbances (LSTIDs) are a frequent phenomenon during ionospheric storms, indicating strong electrodynamic processes in high latitudes. LSTIDs are signatures of Atmospheric Gravity Waves (AGW) observed in the changes of the electron density in the ionosphere. During ionospheric storms, large scale AGWs are often generated in the vicinity of the auroral region, where sudden strong heating processes take place. Many LSTIDs are observed during the ionosphere storm during the September 2017 Space Weather event. In this presentation, the LSTID occurrence on 8th September 2017 is analysed in more detail, based on a TID detection method using ground based Global Navigation Satellite System (GNSS) measurements. Fast LSTIDs are observed in midlatitudes between 0-3 UT and 13-16 UT. Slow LSTIDs are observed between 3-12 UT. A significant strong wave-like TEC perturbation occurred in high latitudes at noon, which vanished at around 50°N. A strong single LSTID in mid-latitudes generated in high latitudes around 18 UT. Consulting IMAGE magnetometer data, ionosonde measurements and Swarm field aligned current measurements, strong heating processes, the extension of the Auroral oval and unusual electrodynamic processes are discussed as source mechanisms for these LSTIDs.

Item URL in elib:https://elib.dlr.de/134967/
Document Type:Conference or Workshop Item (Other)
Title:Properties and Generation of Large Scale Travelling Ionospheric Disturbances during 8 September 2017
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Borries, Claudiaclaudia.borries (at) dlr.dehttps://orcid.org/0000-0001-9948-3353
Ferreira, Arthur AmaralArthur.Ferreira (at) dlr.deUNSPECIFIED
Xiong, ChaoUNSPECIFIEDhttps://orcid.org/0000-0002-7518-9368
Borges, Renato Alvesraborges (at) ene.unb.brUNSPECIFIED
Mielich, JensInstitut für Atmosphärenphysik, KühlungsbornUNSPECIFIED
Kouba, Danielkouba (at) ufa.cas.czUNSPECIFIED
Date:May 2020
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.5194/egusphere-egu2020-18107
Status:Published
Keywords:ionosphere, perturbation, wave, storm, electric fields, TID, GIC
Event Title:EGU General Assembly 2020
Event Location:Online
Event Type:international Conference
Event Dates:4.-08. Mai 2020
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Space Weather Effects EO (old)
Location: Neustrelitz
Institutes and Institutions:Institute for Solar-Terrestrial Physics > Solar-Terrestrial Coupling Processes
Deposited By: Borries, Dr. Claudia
Deposited On:17 Jun 2020 21:52
Last Modified:20 Jun 2021 15:53

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