Articles | Volume 38, issue 2
Ann. Geophys., 38, 437–443, 2020
https://doi.org/10.5194/angeo-38-437-2020

Special issue: 7th Brazilian meeting on space geophysics and aeronomy

Ann. Geophys., 38, 437–443, 2020
https://doi.org/10.5194/angeo-38-437-2020

Regular paper 31 Mar 2020

Regular paper | 31 Mar 2020

Semimonthly oscillation observed in the start times of equatorial plasma bubbles

Igo Paulino et al.

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Revised manuscript under review for ANGEO
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Cited articles

Abalde, J. R., Sahai, Y., Fagundes, P. R., Becker-Guedes, F., Bittencourt, J. A., Pillat, V. G., Lima, W. L. C., Candido, C. M. N., and de Freitas, T. F.: Day-to-day variability in the development of plasma bubbles associated with geomagnetic disturbances, J. Geophys. Res.-Space, 114, A04304, https://doi.org/10.1029/2008JA013788, 2009. a
Abdu, M. A.: Day-to-day and short-term variabilities in the equatorial plasma bubble/spread F irregularity seeding and development, Progress in Earth and Planetary Science, 6, 11, https://doi.org/10.1186/s40645-019-0258-1, 2019. a
Abdu, M. A. and Brum, C. G. M.: Electrodynamics of the vertical coupling processes in the atmosphere-ionosphere system of the low latitude region, Earth Planets Space, 61, 385–395, https://doi.org/10.1186/BF03353156, 2009. a
Abdu, M. A., Alam Kherani, E., Batista, I. S., de Paula, E. R., Fritts, D. C., and Sobral, J. H. A.: Gravity wave initiation of equatorial spread F/plasma bubble irregularities based on observational data from the SpreadFEx campaign, Ann. Geophys., 27, 2607–2622, https://doi.org/10.5194/angeo-27-2607-2009, 2009. a
Carter, B. A., Yizengaw, E., Retterer, J. M., Francis, M., Terkildsen, M., Marshall, R., Norman, R., and Zhang, K.: An analysis of the quiet time day-to-day variability in the formation of postsunset equatorial plasma bubbles in the Southeast Asian region, J. Geophys. Res.-Space, 119, 3206–3223, https://doi.org/10.1002/2013JA019570, 2014. a
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Short summary
In this paper, an extensive study has been done in order to investigate periodic oscillations in the start times of equatorial plasma bubbles observed over Brazil. Using OI6300 airglow images and ionograms, it was possible to detect semimonthly oscillations in the start times of equatorial plasma bubbles (EPBs) and equatorial Spread-F. This semimonthly oscillation is likely related to the lunar tide, which represents an important mechanism acting in the day-to-day variability of EPBs.