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The impact of solar flare induced ionospheric disturbances on 27-day signatures in the T/I-system: preliminary results

Schmölter, Erik and Dühnen, Hanna and Berdermann, Jens (2023) The impact of solar flare induced ionospheric disturbances on 27-day signatures in the T/I-system: preliminary results. EGU General Assembly 2023, 23.–28. April 2023, Wien, Österreich.

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Changes in solar activity are dominant drivers of long- and short-term variations in the upper atmosphere, which can affect each other through complex processes. Regular signatures in the ionosphere are caused, for example, by the 27-day solar rotation period and may be described with a delay of 1 to 2 days in addition to the respective amplitude. Such signatures and the associated delayed response of the ionosphere are influenced by several long-term variations (e.g., seasonal variations or 11-year solar cycle) as described in preceding studies. Here, we present the influence of solar flares on the ionospheric 27-day signatures providing a first insight into the interactions with short-term perturbations. Therefore, we present the response of different thermospheric and ionospheric parameters during X-class solar flare influenced 27-day signatures. We show in particular how the occurrence of solar flares can change accumulation processes and the resulting delay. The observed changes are especially dependent on the phase of the 27-day period in which the solar flares occur. The longest delays are observed for solar flares occurring during the ascending phase of the 27-day solar rotation period. The results are discussed in respect to preceding studies. Finally, we provide an outlook on a possible extension of the analysis by including M-class solar flares as well as additional space weather data sets and modeling results.

Item URL in elib:https://elib.dlr.de/195042/
Document Type:Conference or Workshop Item (Poster)
Title:The impact of solar flare induced ionospheric disturbances on 27-day signatures in the T/I-system: preliminary results
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Schmölter, ErikUNSPECIFIEDhttps://orcid.org/0000-0002-9284-6489UNSPECIFIED
Berdermann, JensUNSPECIFIEDhttps://orcid.org/0000-0002-3308-4584UNSPECIFIED
Date:25 April 2023
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Weltraumwetter, Sonneneruptionen, Ionosphäre
Event Title:EGU General Assembly 2023
Event Location:Wien, Österreich
Event Type:international Conference
Event Dates:23.–28. April 2023
Organizer:European Geosciences Union (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 - Project Space weather research
Location: Neustrelitz
Institutes and Institutions:Institute for Solar-Terrestrial Physics > Space Weather Impact
Deposited By: Schmölter, Erik
Deposited On:22 May 2023 14:50
Last Modified:22 May 2023 14:50

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