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Ionospheric Storms - A challenge for empirical forcast of the Total Electron Content

Borries, Claudia and Berdermann, Jens and Jakowski, N. and Wilken, Volker (2015) Ionospheric Storms - A challenge for empirical forcast of the Total Electron Content. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 120 (4), pp. 3175-3186. Wiley. doi: 10.1002/2015JA020988. ISSN 2169-9380.

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Since the last decades, the functioning of society depends more and more on well-functioning communication and navigation systems. As the availability and reliability of most of these satellite-based systems can be severely impacted by ionospheric storms, the accurate forecast of these events becomes a required task for mitigating social and economic risks. Here we aim to make initial steps toward an empirical model for ionospheric perturbations related to space weather events that are observable in the total electron content (TEC). The perturbation TEC forecast model will be a fast and robust approach, improving TEC forecasts based on climatological models during storm conditions. The derivation of such a model is a challenging task, because although a general dependence of the storm features (enhancement or depletion of electron density) on the storm onset time, local time, season and geomagnetic latitude is well known, there is a large deviation from the mean behavior. For a better understanding of storm conditions, this paper presents analyses of ionospheric storms observed in the TEC, broken down into diverse classes of storms. It provides a detailed characterization of the typical ionospheric storm behavior over Europe from high to midlatitudes, beyond case studies. Generally, the typical clear strong TEC enhancement starting in high latitudes and propagating equatorward is found to be strongest for storms starting in the morning hours independent of the season. In midlatitudes, it is strongest during noon. In addition, a clear difference between summer and winter storms is reported. While only winter storms develop high-latitude TEC enhancements, only summer storms typically exhibit TEC depletions during the storm recovery phase. During winter storms TEC enhancements can also occur the day following the storm onset, in contrast to summer storms. Strong correlation of TEC perturbation amplitudes to the Bz component of the interplanetary magnetic field and to a proxy of the polar cap potential are shown especially for summer midlatitude TEC enhancements during storms with and onset in the morning hours (6 to 12 UT over Europe) and for winter high-latitude TEC enhancements (around 60∘N). The results indicate the potential to derive improved predictions of maximum TEC deviations during space weather events, based on solar wind measurements.

Item URL in elib:https://elib.dlr.de/96858/
Document Type:Article
Title:Ionospheric Storms - A challenge for empirical forcast of the Total Electron Content
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Berdermann, Jensjens.berdermann (at) dlr.deUNSPECIFIED
Wilken, Volkervolker.wilken (at) dlr.deUNSPECIFIED
Date:22 April 2015
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1002/2015JA020988
Page Range:pp. 3175-3186
Keywords:Ionosphere, Space Weather, Solar Storms, Total Electron Content
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
Deposited By: Borries, Dr. Claudia
Deposited On:29 Jun 2015 15:22
Last Modified:08 Mar 2018 18:35

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