Ionospheric disturbances over the American and African sectors due to the 2019 major Sudden Stratospheric Warming (SSW 2019), under low solar activity conditions

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dc.contributor.authorVieira, Francisco
dc.contributor.authorFagundes, Paulo Roberto
dc.contributor.authorPillat, Valdir Gil
dc.contributor.authorAgyei-Yeboah, Ebenezer
dc.contributor.authorVenkatesh, Kavutarapu
dc.contributor.authorArcanjo, Mateus de Oliveira
dc.date.accessioned2025-03-17T16:53:27Z
dc.date.available2025-03-17T16:53:27Z
dc.date.issued22022
dc.description.abstractSudden Stratospheric Warming (SSW) is one of the most spectacular atmospheric large-scale phenomena, which takes place at high latitudes during winter months and is more frequent in the Arctic region than in the Antarctic region. SSWs can change the vertical, latitudinal, and longitudinal distributions of the neutral atmosphere and its dynamics, which in turn affects the ionospheric electrodynamic processes. Simultaneous inferred VTEC from GPS networks over the American and African sectors are used to investigate the ionospheric response due to the SSW 2019 from DOY 356 to DOY 20 (December 22, 2018–January 20, 2019). This study investigates the VTEC and EIA diurnal and day-to-day responses in the American and African sectors during the SSW. It is noted that the VTEC decreased on most of the days at several latitude regions. However, it is also noted that the VTEC increased on some days and in some latitude regions, particularly during the SSW temperature peak. The EIA exhibits significant changes in its shape, intensity, and symmetry during the SSW. This study using simultaneous observations over American and African sectors covering a large geographical extent demonstrates the similarities and differences in ionospheric response to the SSW 2019 event over different regions.
dc.description.physical16 p.
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.uriFAPESP (2019/09361–2 and 2018/10679–4) CNPQ (304721/2021–2) CAPES (88887.176288/2018–00)
dc.format.mimetypePDF
dc.identifier.affiliationUniversidade do Vale do Paraíba
dc.identifier.affiliationInstituto Federal de Tocantins
dc.identifier.affiliationSpace and Atmospheric Sciences Division Physical Research Laboratory
dc.identifier.bibliographicCitationVIERIA, Francisco et al. Ionospheric disturbances over the American and African sectors due to the 2019 major Sudden Stratospheric Warming (SSW 2019), under low solar activity conditions. Journal of Atmospheric and Solar-Terrestrial Physics, v. 240, p. 1-16, 2022. Disponível em: https://linkinghub.elsevier.com/retrieve/pii/S1364682622001183.
dc.identifier.doi10.1016/j.jastp.2022.105945
dc.identifier.urihttps://repositorio.univap.br/handle/123456789/706
dc.language.isopt_BR
dc.publisherElsevier
dc.rights.holderJournal of Atmospheric and Solar-Terrestrial Physics
dc.subject.keywordIonospheric disturbances
dc.subject.keywordSudden stratospheric warming
dc.subject.keywordSolar activity
dc.titleIonospheric disturbances over the American and African sectors due to the 2019 major Sudden Stratospheric Warming (SSW 2019), under low solar activity conditions
dc.typeArtigos de Periódicos

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