Fontes, Pedro AlvesMuella, Marcio Tadeu de Assis HonoratoResende, Laysa Cristina AraújoJesus, Rodolfo deFagundes, Paulo RobertoMitra, GouravPillat, Valdir GilBatista, Paulo PradoBuriti, Ricardo ArlenCorreia, EmíliaMuka, Peter Taiwo2025-08-152025-08-142025-08-15https://repositorio.univap.br/handle/123456789/1020.2This study investigates the impact of the rare 2019 Antarctic Sudden Stratospheric Warming (SSW) event on the top frequency parameter (ftEs) of the sporadic E (Es) layers, using data from several ionosondes located at low and mid-latitudes across the Southern and Northern Hemispheres, including stations in the American, Oceanian, and Asian regions. The ionosonde data were also used to identify frequency anomalies in the Es layers during the event. Additionally, data from three meteor radars in South America were used to further analyze the impact of the SSW, focusing on key parameters such as tidal winds and Planetary Wave (PW) oscillations. The study found significant ftEs peaks exceeding 10 MHz, particularly at low-latitude stations, with values reaching up to 20 MHz. The presence of these atypical peaks in ftEs was related to PW activity, which intensified the electron densities in the Es layers. A wavelet analysis of the ftEs and neutral wind data revealed oscillations associated with PW and tidal interactions, with dominant periods of ∼2–8-days. These patterns were more pronounced in the Southern Hemisphere, indicating stronger PW-tide coupling compared to the Northern Hemisphere. In addition, this study shows that the non-linear interaction between the PW and the tides occurred globally, generating secondary oscillations of ∼2–8-days on the Es layer development for the three continents. These oscillations were observed in the zonal (U) and meridional (V) winds of the diurnal and semidiurnal tides (DT and ST) during the SSW event, demonstrating a coupling in the troposphere-stratosphere-lower atmosphere dynamics. The coupling between the stratosphere and lower thermosphere contributed to the observed anomalies, revealing the broader impacts of SSW events on Es layer behavior. This study provides an understanding of the impact of SSW on Es layers, using ionosonde data and wave oscillation analysis that could enhance data assimilation models for more accurate ionospheric prediction.PDFen-USArtigos de PeriódicosAdvances in Space Research10.1016/j.asr.2025.04.069Sporadic-E layerSudden stratospheric warmingPlanetary waveTidal windsFONTES, Pedro Alves et al. Effects of planetary wave oscillation on E-sporadic (Es) layers during the rare Antarctic sudden stratospheric warming of 2019. Advances in Space Research, p. 1-26, 2025. Disponível em: 10.1016/j.asr.2025.04.069.Universidade do Vale do ParaíbaInstituto Federal do MaranhãoState Key Laboratory of Space WeatherInstituto Nacional de Pesquisas EspaciaisPhysical Research LaboratoryUniversidade Federal de Campina GrandeUniversidade Presbiteriana MackenzieLadoke Akintola University of Technology