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  Analysis of the instability effect in the sporadic E (Es) layer development over a low latitude station

Araujo Resende Chagas, L. C., Zhu, Y., Denardini, C. M., Chagas, R. A. J., Da Silva, L. A., Figueiredo, C., Andrioli, V. F., Chen, S., Marchezi, J., Moro, J., Carrasco, J. A., Wang, C., Li, H., Zhengkuan, L. (2023): Analysis of the instability effect in the sporadic E (Es) layer development over a low latitude station, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-1234

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Datensatz-Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017403 Versions-Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017403_1
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Araujo Resende Chagas, Laysa Cristina1, Autor
Zhu, Yajun1, Autor
Denardini, Clezio M.1, Autor
Chagas, Ronan A. J.1, Autor
Da Silva, Ligia A.1, Autor
Figueiredo, Cosme1, Autor
Andrioli, Vania F.1, Autor
Chen, Sony1, Autor
Marchezi, José1, Autor
Moro, Juliano1, Autor
Carrasco, Jose A.1, Autor
Wang, Chi1, Autor
Li, Hui1, Autor
Zhengkuan, Liu1, Autor
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

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 Zusammenfassung: We present a study about the atypical and spreading Sporadic E-layers (Es) using digisonde data. We analyzed a set of days around space weather events from 2016 to 2018 over Cachoeira Paulista (CXP, 22.41°S, 45°W, dip ~35°), a low-latitude Brazilian station. In this region, the inhomogeneous Es layer is associated with the auroral-type (Esa) and occurred due to the South American Magnetic Anomaly (SAMA). However, we also observe that the spreading Es layers occurred days before the magnetic storms, leading us to believe other mechanisms may affect the Es layer development. Thus, our results show evidence that Kelvin-Helmholtz instability (KHI) added to the wind shear mechanism cause such Es layers. We used a numerical model to understand these dynamic processes (MIRE, Portuguese acronym for E Region Ionospheric Model). The results showed that the instability explained these anomalous Es layers and improved the agreement between the model and observational data. Finally, our analysis better understood the Es layer behavior during quiet and disturbed times.

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Sprache(n): eng - Englisch
 Datum: 2023
 Publikationsstatus: Final veröffentlicht
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 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: DOI: 10.57757/IUGG23-1234
 Art des Abschluß: -

Veranstaltung

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Titel: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Veranstaltungsort: Berlin
Start-/Enddatum: 2023-07-11 - 2023-07-20

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Titel: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Genre der Quelle: Konferenzband
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: Potsdam : GFZ German Research Centre for Geosciences
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