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Studying the dynamics in the ionosphere-thermosphere system during 20th November 2003 storm with CTIPe

Borries, Claudia and Fernandez Gomez, Isabel and Codrescu, M. V. and Fedrizzi, M. (2018) Studying the dynamics in the ionosphere-thermosphere system during 20th November 2003 storm with CTIPe. EGU General Assembly, Wien, Österreich.

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Abstract

Geomagnetic storms often go along with ionospheric disturbances which may threaten radio systems used for communication and navigation. During the super storm on 20 November 2003 for example, plenty of strong and unusual perturbations were reported. This paper analyses the dynamics of the high-latitude ionosphere over Europe during this storm. Here, Total Electron Content (TEC) measurements derived from ground-based Global Navigation Satellite System (GNSS) observations are used to monitor large scale traveling ionospheric disturbances (LSTIDs). The source region of these LSTIDs is characterized by enhanced spatial gradients, TEC depletion, strong electron density uplifting, the proximity of the eastward auroral electrojet and strong Aurora E-layers. 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 Coupled Thermosphere Ionosphere Plasmasphere electrodynamics (CTIPe) clearly reproduces intensive Joule heating in the source region of the LSTIDs. The sudden heating of the thermosphere leads to strong vertical winds in the heating region and the development of so-called storm wind cells. The sudden changes in wind and pressure generate thermospheric wind surges, which are observed as LSTID signatures in the TEC. The surges are also reproduced by CTIPe in the vertical winds. As potential source mechanisms for the Joule heating the dissipation of the eastward auroral electrojet and/or particle precipitation are considered. The presented results demonstrate the complex interaction processes in the thermosphere-ionosphere-magnetosphere system during the extreme storm on 20 November 2003.

Item URL in elib:https://elib.dlr.de/123062/
Document Type:Conference or Workshop Item (Speech)
Title:Studying the dynamics in the ionosphere-thermosphere system during 20th November 2003 storm with CTIPe
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Borries, Claudiaclaudia.borries (at) dlr.deUNSPECIFIED
Fernandez Gomez, IsabelIsabel.FernandezGomez (at) dlr.deUNSPECIFIED
Codrescu, M. V.SWPC, NOAA, BoulderUNSPECIFIED
Fedrizzi, M.SWPC, NOAA, BoulderUNSPECIFIED
Date:11 April 2018
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Ionosphere, Modelling, Coupling
Event Title:EGU General Assembly
Event Location:Wien, Österreich
Event Type:international Conference
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
Location: Neustrelitz
Institutes and Institutions:Institute of Communication and Navigation > Navigation
Deposited By: Borries, Dr. Claudia
Deposited On:23 Nov 2018 14:42
Last Modified:23 Nov 2018 14:42

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