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Improving estimates of the ionosphere during geomagnetic storm conditions through assimilation of thermospheric mass density

Fernandez Gomez, Isabel und Kodikara, Timothy und Borries, Claudia und Forootan, Ehsan und Goss, Andreas und Schmidt, Michael und Codrescu, Mihail (2022) Improving estimates of the ionosphere during geomagnetic storm conditions through assimilation of thermospheric mass density. Earth, Planets and Space, 74 (121). Springer. doi: 10.1186/s40623-022-01678-3. ISSN 1343-8832.

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Offizielle URL: https://rdcu.be/cTaHA

Kurzfassung

Dynamical changes in the ionosphere and thermosphere during geomagnetic storm times can have a significant impact on our communication and navigation applications, as well as satellite orbit determination and prediction activities. Because of the complex electrodynamics coupling processes during storms, which cannot be fully described with the sparse set of thermosphere–ionosphere (TI) observations, it is crucial to accurately model the state of the TI system. The approximation closest to the true state can be obtained by assimilating relevant measurements into physics-based models. Thermospheric mass density (TMD) derived from satellite measurements is ideal to improve the thermosphere through data assimilation. Given the coupled nature of the TI system, the changes in the thermosphere will also influence the ionosphere state. This study presents a quantification of the changes and improvement of the model state produced by assimilating TMD not only for the thermosphere density but also for the ionosphere electron density under storm conditions. TMD estimates derived from a single Swarm satellite and the Coupled Thermosphere Ionosphere Plasmasphere electrodynamics (CTIPe) physics-based model are used for the data assimilation. The results are presented for a case study during the St. Patricks Day storm 2015. It is shown that the TMD data assimilation generates an improvement of the model’s thermosphere density of up to 40% (measured along the orbit of the non-assimilated Swarm satellites). The model’s electron density during the course of the storm has been improved by approximately 8 and 22% relative to Swarm-A and GRACE, respectively. The comparison of the model’s global electron density against a high-quality 3D electron density model, generated through assimilation of total electron content, shows that TMD assimilation modifies the model’s ionosphere state positively and negatively during storm time. The major improvement areas are the mid-low latitudes during the storm’s recovery phase.

elib-URL des Eintrags:https://elib.dlr.de/187832/
Dokumentart:Zeitschriftenbeitrag
Zusätzliche Informationen:This work was supported by the Insight II project from the German Research Foundation (DFG) with grant number BO 5011/2-2
Titel:Improving estimates of the ionosphere during geomagnetic storm conditions through assimilation of thermospheric mass density
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Fernandez Gomez, IsabelIsabel.FernandezGomez (at) dlr.dehttps://orcid.org/0000-0001-7623-9219NICHT SPEZIFIZIERT
Kodikara, TimothyTimothy.Kodikara (at) dlr.dehttps://orcid.org/0000-0003-4099-9966NICHT SPEZIFIZIERT
Borries, Claudiaclaudia.borries (at) dlr.dehttps://orcid.org/0000-0001-9948-3353NICHT SPEZIFIZIERT
Forootan, Ehsanefo (at) plan.aau.dkhttps://orcid.org/0000-0003-3055-041XNICHT SPEZIFIZIERT
Goss, Andreasandreas.goss (at) tum.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Schmidt, Michaelmg.schmidt (at) tum.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Codrescu, MihailSWPC, NOAA, Boulderhttps://orcid.org/0000-0001-7216-9858NICHT SPEZIFIZIERT
Datum:6 August 2022
Erschienen in:Earth, Planets and Space
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Ja
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:74
DOI:10.1186/s40623-022-01678-3
Herausgeber:
HerausgeberInstitution und/oder E-Mail-Adresse der HerausgeberHerausgeber-ORCID-iDORCID Put Code
Stole, ClaudiaNICHT SPEZIFIZIERTNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Verlag:Springer
Name der Reihe:DynamicEarth: Earth's Interior, Surface, Ocean, Atmosphere, and Near Space Interactions
ISSN:1343-8832
Status:veröffentlicht
Stichwörter:Data assimilation, Geomagnetic storm, Neutral density, Thermosphere - Ionosphere system
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Erdbeobachtung
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):R - Solar-Terrestrische Physik SO
Standort: Neustrelitz
Institute & Einrichtungen:Institut für Solar-Terrestrische Physik > Solar-Terrestrische Kopplungsprozesse
Hinterlegt von: Fernandez Gomez, PhD. Isabel
Hinterlegt am:29 Aug 2022 09:18
Letzte Änderung:23 Sep 2022 04:14

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