Effects of the Northern Hemisphere sudden stratospheric warmings on the Sporadic-E layers in the Brazilian sector

Fontes Neto, Pedro Alves; Muella, Tadeu de Assis Honorato; Resende, Laysa Cristina Araújo; Jesus, Rodolfo de; Fagundes, Paulo Roberto; Batista, Paulo Prado; Pillat, Valdir Gil; Tardelli, Alexandre; Andrioli, Vania F.

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Effects of the Northern Hemisphere sudden stratospheric warmings on the Sporadic-E layers in the Brazilian sector

dc.contributor.author	Fontes Neto, Pedro Alves
dc.contributor.author	Muella, Tadeu de Assis Honorato
dc.contributor.author	Resende, Laysa Cristina Araújo
dc.contributor.author	Jesus, Rodolfo de
dc.contributor.author	Fagundes, Paulo Roberto
dc.contributor.author	Batista, Paulo Prado
dc.contributor.author	Pillat, Valdir Gil
dc.contributor.author	Tardelli, Alexandre
dc.contributor.author	Andrioli, Vania F.
dc.date.accessioned	2025-02-06T14:44:12Z
dc.date.available	2025-02-06T14:44:12Z
dc.date.issued2	2024
dc.description.abstract	Tidal and Planetary Wave (PWs) amplitudes are strongly influenced by Sudden Stratospheric Warming (SSW) events. A nonlinear interaction between the tidal winds and planetary waves during the SSW may contribute to the intensification of sporadic-E (Es) layers in the lower thermosphere. This work investigated the relationship between SSW events in the Northern Hemisphere and the Es layer occurrence at low latitudes in the Brazilian sector. We used data from digital ionosondes installed in the observatories of Araguatins (ARA, 5.65◦ S; 48.12◦ W; dip lat. − 5.44◦) and S ̃ao Jos ́e dos Campos (SJC, 23.18◦ S; 45.89◦ W; dip lat. − 21.37◦) to analyze the Es layers. Additionally, we used the temperature, zonal wind, and PWs data at high latitudes in the Northern Hemisphere during the major SSW event that occurred in February/2018 and during the events of Dec/2018–Jan/2019 and Dec/2020–Jan/2021. The results showed a maximum frequency peak of 20 MHz (~5 × 106 electrons.cm− 3) at ARA and SJC during these SSW events. The large values of ftEs, fbEs, and electronic densities were observed between 100 and 115 km height in the Esf/l type layers during daytime or nighttime periods. The results also showed that the number of large values of ftEs, fbEs, and electronic density of the Es layer was much higher in ARA than in SJC, in general. The wavelet power spectrum analyses of the ftEs and fbEs showed a periodicity of 2- days before and after the central day of the SSWs events at the station of ARA, with three prominent peaks in the 2018/2019 event. At the SJC station the quasi-2-day periodicity in the wavelet analyses of the ftEs was observed after the central day in all three SSW events, with a peak before the central day during the 2020/2021 event.
dc.description.physical	15 p.
dc.description.sponsorship	Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorship	Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.uri	CAPES (88887.372542/2019-00, 88882.317521/2019-01) CNPQ (314261/2020-6)
dc.format.mimetype	PDF
dc.identifier.affiliation	Universidade do Vale do Paraíba
dc.identifier.affiliation	Instituto Federal do Maranhão
dc.identifier.affiliation	Instituto Nacional de Pesquisas Espaciais - INPE
dc.identifier.affiliation	State Key Laboratory of Space Weather
dc.identifier.bibliographicCitation	FONTES NETO, Pedro Alves et al. Effects of the Northern Hemisphere sudden stratospheric warmings on the Sporadic-E layers in the Brazilian sector. Journal of Atmospheric and Solar-Terrestrial Physics, v. 256, p. 1-15, 2024. Disponível em: https://linkinghub.elsevier.com/retrieve/pii/S1364682624000270.
dc.identifier.doi	10.1016/j.jastp.2024.106199
dc.identifier.uri	https://repositorio.univap.br/handle/123456789/552
dc.language.iso	en_US
dc.publisher	Elsevier
dc.rights.holder	Elsevier
dc.subject.keyword	Sudden stratospheric warming
dc.subject.keyword	Tidal winds
dc.subject.keyword	Sporadic-E layer
dc.subject.keyword	Q2DWs periodicity
dc.title	Effects of the Northern Hemisphere sudden stratospheric warmings on the Sporadic-E layers in the Brazilian sector
dc.type	Artigos de Periódicos