Articles | Volume 38, issue 2
Ann. Geophys., 38, 507–516, 2020
https://doi.org/10.5194/angeo-38-507-2020

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

Ann. Geophys., 38, 507–516, 2020
https://doi.org/10.5194/angeo-38-507-2020

Regular paper 16 Apr 2020

Regular paper | 16 Apr 2020

Investigation of sources of gravity waves observed in the Brazilian equatorial region on 8 April 2005

Oluwakemi Dare-Idowu et al.

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Cited articles

Bretherton, F. P.: The propagation of groups of internal gravity waves in a shear flow, Q. J. Roy. Meteor. Soc., 92, 466–480, https://doi.org/10.1002/qj.49709239403, 1966. 
Brown, L. B., Gerrard, A. J., Meriwether, J. W., and Makela, J. J.: All-sky imaging observations of mesospheric fronts in OI 557.7 nm and broadband OH airglow emissions: Analysis of frontal structure, atmospheric background conditions, and potential sourcing mechanisms, J. Geophys. Res., 109, D19104, https://doi.org/10.1029/2003JD004223, 2004. 
Campos J. A. V., Paulino, I., Wrasse, C. M., Medeiros, A. F., Paulino, A. R., and Buriti, R. A.: Observations of small-scale gravity waves in the equatorial upper mesosphere, Revista Brasileira de Geofísica, 34, 469–477, https://doi.org/10.22564/rbgf.v34i4.876, 2016. 
Clemesha, B. and Batista, P.: Gravity waves and wind-shear in the MLT at 23 S, Adv. Space Res., 41, 1472–1477, https://doi.org/10.1016/j.asr.2007.03.085, 2008. 
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Some strong gravity wave activity occurred and was observed on 8 April 2005. This work reports the spectral characteristics of these waves using OH airglow images captured by the all-sky imager installed at São João do Cariri (7.4° S, 36.5° W). A preferential propagation direction was observed due to the positioning of the source and also due to the wind filtering effect. Furthermore, the source of these waves was identified by performing reverse-ray tracing analysis.