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Perspectives on the delayed ionospheric response to solar 27-day signatures: A summary of recent studies

Schmölter, Erik and Dühnen, Hanna and Vaishnav, Rajesh and von Savigny, Christian and Heymann, Frank and Berdermann, Jens (2023) Perspectives on the delayed ionospheric response to solar 27-day signatures: A summary of recent studies. 28th IUGG General Assembly, 11.-20. Jul. 2023, Berlin, Deutschland.

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Solar extreme ultraviolet radiation is continuously absorbed in the dayside upper atmosphere and controls the creation of ionospheric plasma and its variability via complex interactions. Through these coupled processes, solar signatures such as the 27-day solar rotation period are introduced to the ionospheric state and are observed via various measurements. For example, time-delayed 27-day signatures with varying amplitudes are found for the main ion species and electrons, whose distributions in turn also vary in longitude, latitude, and altitude. Other changes are driven by space weather events such as geomagnetic storms or solar flares. Therefore, a full understanding of the chemical and physical processes is required to correctly describe the delayed ionospheric response. In a series of studies, we investigated and characterized these variations with different satellite- and ground-based measurements (e.g. recent studies with various NASA GOLD data products). Simulations with physics-based models were applied to reproduce the observed variations and to identify the driving processes. While the occurrence of the 27-day signatures is mainly controlled by photoionization and recombination, the delay in particular is significantly driven by photodissociation and transport across different ionospheric layers. In this presentation, we provide an overview of the main results of our studies and preview future work. We also highlight those results that are of interest for the improvement of ionospheric modelling.

Item URL in elib:https://elib.dlr.de/196044/
Document Type:Conference or Workshop Item (Speech)
Title:Perspectives on the delayed ionospheric response to solar 27-day signatures: A summary of recent studies
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Schmölter, ErikUNSPECIFIEDhttps://orcid.org/0000-0002-9284-6489UNSPECIFIED
Vaishnav, RajeshLeipzig Institute for Meteorology, Universität Leipzighttps://orcid.org/0000-0002-3181-0781UNSPECIFIED
von Savigny, ChristianUniversity of GreifswaldUNSPECIFIEDUNSPECIFIED
Heymann, FrankUNSPECIFIEDhttps://orcid.org/0000-0002-3245-4272UNSPECIFIED
Berdermann, JensUNSPECIFIEDhttps://orcid.org/0000-0002-3308-4584UNSPECIFIED
Date:13 July 2023
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Ionosphere, Solar Proxies, Time Delay
Event Title:28th IUGG General Assembly
Event Location:Berlin, Deutschland
Event Type:international Conference
Event Dates:11.-20. Jul. 2023
Organizer:International Union of Geodesy and Geophysics
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 - space weather influence
Location: Neustrelitz
Institutes and Institutions:Institute for Solar-Terrestrial Physics > Space Weather Impact
Deposited By: Schmölter, Erik
Deposited On:22 Aug 2023 09:41
Last Modified:22 Aug 2023 09:41

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