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The Impact of Severe Storms on Forecasting the Ionosphere-Thermosphere system through the assimilation of SWARM-derived neutral mass density into physics-based models

Fernandez-Gomez, Isabel and Goss, Andreas and Schmidt, Michael and Kosary, Mona and Kodikara, Timothy and Forootan, Ehsan and Borries, Claudia (2021) The Impact of Severe Storms on Forecasting the Ionosphere-Thermosphere system through the assimilation of SWARM-derived neutral mass density into physics-based models. vEGU General Assembly 2021, 26-30 April 2021, Virtual. doi: 10.5194/egusphere-egu21-10552.

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Abstract

The response of the Ionosphere - Thermosphere (IT) system to severe storm conditions is of great importance to fully understand its coupling mechanisms. The challenge to represent the governing processes of the upper atmosphere depends, to a large extent, on an accurate representation of the true state of the IT system, that we obtain by assimilating relevant measurements into physics-based models. Thermospheric Mass Density (TMD) is the summation of total neutral mass within the atmosphere that is derived from accelerometer measurements of satellite missions such as CHAMP, GOCE, GRACE(-FO) and Swarm. TMD estimates can be assimilated into physics-based models to modify the state of the processes within the IT system. Previous studies have shown that this modification can potentially improve the simulations and predictions of the ionospheric electron density. These differences could also be interpreted as an indicator of the ionosphere-thermosphere interaction. The research presented here, aims to quantify the impact of data satellite based TMD assimilation on numerical model results. Subject of this study is the Coupled Thermosphere-Ionosphere-Plasmasphere electrodynamics (CTIPe) physics-based model in combination with the recently developed Thermosphere-Ionosphere Data Assimilation (TIDA) scheme. TMD estimates from the ESA’s Swarm mission are assimilated in CTIPe-TIDA during the 16 to the 20 of March 2015. This period was characterized by a strong geomagnetic storm that triggered significant changes in the IT system, the so-called St. Patrick day storm 2015. To assess the changes in the IT system during storm conditions due to data assimilation, the model results from assimilating SWARM mass density normalized to the altitude of 400 km are compared to independent thermospheric estimates like GRACE-TMDS. In order to evaluate the impact of the data assimilation on the ionosphere, the corresponding output of electron density is compared to high-quality electron density estimates derived from data-driven model of the DGFI-TUM.

Item URL in elib:https://elib.dlr.de/142259/
Document Type:Conference or Workshop Item (Speech)
Title:The Impact of Severe Storms on Forecasting the Ionosphere-Thermosphere system through the assimilation of SWARM-derived neutral mass density into physics-based models
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Fernandez-Gomez, IsabelIsabel.FernandezGomez (at) dlr.dehttps://orcid.org/0000-0001-7623-9219
Goss, Andreasandreas.goss (at) tum.deUNSPECIFIED
Schmidt, Michaelmg.schmidt (at) tum.deUNSPECIFIED
Kosary, Monamona.kosary (at) ut.ac.irUNSPECIFIED
Kodikara, TimothyTimothy.Kodikara (at) dlr.dehttps://orcid.org/0000-0003-4099-9966
Forootan, EhsanAalborg UniversityUNSPECIFIED
Borries, Claudiaclaudia.borries (at) dlr.dehttps://orcid.org/0000-0001-9948-3353
Date:26 April 2021
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.5194/egusphere-egu21-10552
Status:Published
Keywords:Thermosphere-Ionosphere, Data Assimilation, Geomagnetic storm
Event Title:vEGU General Assembly 2021
Event Location:Virtual
Event Type:international Conference
Event Dates:26-30 April 2021
Organizer:EGU
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 - Solar-Terrestrial Physics SO
Location: Neustrelitz
Institutes and Institutions:Institute for Solar-Terrestrial Physics > Solar-Terrestrial Coupling Processes
Deposited By: Fernandez Gomez, PhD. Isabel
Deposited On:19 May 2021 14:08
Last Modified:09 Jun 2021 08:28

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