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Impact of Sudden Stratospheric Warmings and Elevated Stratopause events on the VLF signal in high latitudes

Schneider, Helen und Wendt, Vivien und Banyś (geb. Wenzel), Daniela und Clilverd, Mark (2023) Impact of Sudden Stratospheric Warmings and Elevated Stratopause events on the VLF signal in high latitudes. IUGG 2023, 2023-07-12 - 2023-07-19, Berlin, Deutschland.

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Kurzfassung

Sudden Stratospheric Warmings (SSW) and Elevated Stratopause (ES) events are atmospheric wave driven winter phenomena, which lead to significant changes in wind, temperatures and vertical mass transport, especially in stratospheric and mesospheric altitudes. Presumably, SSW and ES induced changes also cause modifications in the sensitive D-region ionization (~60-90 km). This bottom side of the Ionosphere behaves together with the Earth-surface as a reflection boundary for Very Low Frequency (VLF) transmission, used for long distance communication. Here we want to study the impact of SSW/ES events on the VLF signal amplitude in high latitudes. For the identification of SSW/ES induced perturbations of the VLF signal, the typical seasonal variation and outlier caused by noise, technical adjustments or solar events need to be removed. A quiet time curve, representing the seasonal VLF signal variation under undisturbed conditions, was developed with a polynomial fit of the composite. In preparation for the composite, the VLF data needed to be leveled due to artificial amplitude steps with technical origin in the timeseries. The leveling was done with help of the Pruned Exact Linear Time method. Additionally, outlier have been removed using the Median Absolute Deviation, a method from robust statistics. With help of the developed quiet time curve, VLF signal perturbations could be identified, caused by the SSW and ES events. Here we want to describe and discuss those VLF signal perturbations for multiple links in high latitudes, considering the different pathways between transmitter and receiver as the ES events vary strongly with longitude.

elib-URL des Eintrags:https://elib.dlr.de/196614/
Dokumentart:Konferenzbeitrag (Poster)
Titel:Impact of Sudden Stratospheric Warmings and Elevated Stratopause events on the VLF signal in high latitudes
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Schneider, Helenhelen.schneider (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Wendt, VivienVivien.Wendt (at) dlr.dehttps://orcid.org/0000-0003-1806-4507NICHT SPEZIFIZIERT
Banyś (geb. Wenzel), DanielaDaniela.Banys (at) dlr.dehttps://orcid.org/0000-0001-6623-6612NICHT SPEZIFIZIERT
Clilverd, MarkBritish Antarctic Survey, High Cross, Cambridge, UKhttps://orcid.org/0000-0002-7388-1529NICHT SPEZIFIZIERT
Datum:16 Juli 2023
Referierte Publikation:Nein
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:VLF signal amplitude, D-region, Sudden Stratospheric Warming, Elevated Stratopause, quiet time line
Veranstaltungstitel:IUGG 2023
Veranstaltungsort:Berlin, Deutschland
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:12 Juli 2023
Veranstaltungsende:19 Juli 2023
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 Kopplungsprozesse, R - Ionosphäre
Standort: Neustrelitz
Institute & Einrichtungen:Institut für Solar-Terrestrische Physik > Solar-Terrestrische Kopplungsprozesse
Hinterlegt von: Schneider, Helen
Hinterlegt am:18 Sep 2023 11:15
Letzte Änderung:24 Apr 2024 20:56

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