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On the dynamics of large-scale traveling ionospheric disturbances over Europe on 20 November 2003

Borries, Claudia and Jakowski, Norbert and Kauristie, Kirsti and Amm, Olaf and Mielich, Jens and Kouba, Daniel (2017) On the dynamics of large-scale traveling ionospheric disturbances over Europe on 20 November 2003. Journal of Geophysical Research: Space Physics, 122. Wiley. doi: 10.1002/2016JA023050. ISSN 2169-9380.

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Ionospheric disturbances, often associated with geomagnetic storms, may cause threats to radio systems used for communication and navigation. One example is the super storm on 20 November 2003, when plenty of strong and unusual perturbations were reported. This paper reveals additional information on the dynamics in the high-latitude ionosphere over Europe during this storm. Here analyses of wavelike traveling ionospheric disturbances (TIDs) over Europe are presented, based on estimates of the total electron content (TEC) derived from ground-based Global Navigation Satellite System (GNSS) measurements. These TIDs are ionospheric signatures of thermospheric surges initiated by space weather events. The source region of these TIDs is characterized by enhanced spatial gradients, TEC depression, strong uplift of the F2 layer, the vicinity of the eastward auroral electrojet, and strong aurora E layers. Joule heating is identified as the most probable driver for the TIDs observed over Europe during 20 November 2003. The sudden heating of the thermosphere leads to strong changes in the pressure and thermospheric wind circulation system, which in turn generates thermospheric wind surges observed as TID signatures in the TEC. Either the dissipation of the eastward auroral electrojet or particle precipitation are considered as the source mechanism for the Joule heating. In the course of the storm, the TEC observations show a southward shift of the source region of the TIDs. These meridional dislocation effects are obviously related to a strong compression of the plasmasphere. The presented results demonstrate the complex interaction processes in the thermosphere-ionosphere-magnetosphere system during this extreme storm.

Item URL in elib:https://elib.dlr.de/104771/
Document Type:Article
Title:On the dynamics of large-scale traveling ionospheric disturbances over Europe on 20 November 2003
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Borries, ClaudiaUNSPECIFIEDhttps://orcid.org/0000-0001-9948-3353UNSPECIFIED
Jakowski, NorbertUNSPECIFIEDhttps://orcid.org/0000-0003-3174-2624UNSPECIFIED
Mielich, JensLeibniz-Institute of Atmospheric Physics, Juliusruh, GermanyUNSPECIFIEDUNSPECIFIED
Date:7 January 2017
Journal or Publication Title:Journal of Geophysical Research: Space Physics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Keywords:ionosphere, storm, TEC, TID, heating
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Communication and Navigation
DLR - Research area:Raumfahrt
DLR - Program:R KN - Kommunikation und Navigation
DLR - Research theme (Project):R - Vorhaben Ionosphäre (old)
Location: Neustrelitz
Institutes and Institutions:Institute of Communication and Navigation > Navigation
Deposited By: Borries, Dr. Claudia
Deposited On:14 Feb 2017 16:48
Last Modified:08 Nov 2023 15:13

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