Articles | Volume 41, issue 1
https://doi.org/10.5194/angeo-41-209-2023
https://doi.org/10.5194/angeo-41-209-2023
Regular paper
 | 
21 Apr 2023
Regular paper |  | 21 Apr 2023

Effects of the terdiurnal tide on the sporadic E (Es) layer development at low latitudes over the Brazilian sector

Pedro Alves Fontes, Marcio Tadeu de Assis Honorato Muella, Laysa Cristina Araújo Resende, Vânia Fátima Andrioli, Paulo Roberto Fagundes, Valdir Gil Pillat, Paulo Prado Batista, and Alexander Jose Carrasco

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Cited articles

Akmaev, R. A.: Seasonal variations of the terdiurnal tide in the mesosphere and lower thermosphere: A model study, Geophys. Res. Lett., 28, 3817–3820, https://doi.org/10.1029/2001GL013002, 2001. 
Andoh, S., Saito, A., Shinagawa, H., and Ejiri, M. K.: First simulations of day-to-day variability of mid-latitude sporadic E layer structures, Earth Planet. Space, 72, 1–9, https://doi.org/10.1186/s40623-020-01299-8, 2020. 
Andrioli, V. F., Clemesha, B. R., Batista, P. P., and Schuch, N. J.: Atmospheric tides and mean winds in the meteor region over Santa Maria (29.7 S; 53.8 W), J. Atmos. Sol.-Terr. Phys., 71, 1864–1876, https://doi.org/10.1016/j.jastp.2009.07.005, 2009. 
Arras, C., Jacobi, C., and Wickert, J.: Semidiurnal tidal signature in sporadic E occurrence rates derived from GPS radio occultation measurements at higher midlatitudes, Ann. Geophys., 27, 2555–2563, https://doi.org/10.5194/angeo-27-2555-2009, 2009. 
Bergsson, B. and Syndergaard, S.: Global Temporal and Spatial Variations of Ionospheric Sporadic-E Derived from Radio Occultation Measurements, J. Geophys. Res.-Space, 127, 1–21, https://doi.org/10.1029/2022JA030296, 2022. 
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Short summary
In the terrestrial ionosphere, sporadic (metallic) layers are formed. The formation of these layers are related to the action of atmospheric waves. These waves, also named tides, are due to the absorption of solar radiation in the atmosphere. We investigated the role of the tides with 8 h period in the formation of the sporadic layers. The study was conducted using ionosonde and meteor radar data, as well as computing simulations. The 8 h tides intensified the density of the sporadic layers.