Articles | Volume 38, issue 6
Ann. Geophys., 38, 1247–1256, 2020
https://doi.org/10.5194/angeo-38-1247-2020

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

Ann. Geophys., 38, 1247–1256, 2020
https://doi.org/10.5194/angeo-38-1247-2020

Regular paper 17 Dec 2020

Regular paper | 17 Dec 2020

Diurnal mesospheric tidal winds observed simultaneously by meteor radars in Costa Rica (10° N, 86° W) and Brazil (7° S, 37° W)

Ricardo A. Buriti et al.

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Revised manuscript under review for ANGEO
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Cited articles

Buriti, R. A., Takahashi, H., Lima, L. M., and Medeiros, A. F.: Equatorial planetary waves in the mesosphere observed by airglow periodic oscillations, Adv. Space Res. 35, 2031–2036, https://doi.org/10.1016/j.asr.2005.07.012, 2005. 
Buriti, R. A., Hocking, W. K., Batista, P. P., Medeiros, A. F., and Clemesha, B. R.: Observations of equatorial mesospheric winds over Cariri (7.41 S) by a meteor radar and comparison with existing models, Ann. Geophys., 26, 485–497, doi.org/10.5194/angeo-26-485-2008, 2008. 
Chang, L. C., Ward, W. E., Palo, S. E., Du,J., Wang, D.-Y., Liu, H. L., Hagan, M. E., Portnyagin,Y., Oberheide, J., Goncharenko, L. P., Nakamura, T., Hoffmann, P., Singer, W., Batista, P., Clemesha, B., Manson, A. H., Riggin, D. M., She, C.-Y., Tsuda, T., and Yuan, T.: Comparison of diurnal tide in models and ground-based observations during the 2005 equinox CAWSES tidal campaign, J. Atmos. Sol.-Terr. Phys., 78-79, 19–30, https://doi.org/10.1016/j.jastp.2010.12.010, 2012. 
Chapman, S. and Lindzen, R. S.: Atmospheric Tides: Thermal and Gravitational, D. Reidel, Dordrecht, 200 pp., 1970. 
Davis, R. N., Du, J., Smith, A. K., Ward, W. E., and Mitchell, N. J.: The diurnal and semidiurnal tides over Ascension Island (8 S, 14 W) and their interaction with the stratospheric quasi-biennal oscillation: studies with meteor radar, eCMAM and WACCM, Atmos. Chem. Phys., 13, 9543–9564, https://doi.org/10.5194/acp-13-9543-2013, 2013. 
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Short summary
Solar atmospheric tides are natural oscillations of 24, 12, 8... hours that contribute to the circulation of the atmosphere from low to high altitudes. The Sun heats the atmosphere periodically because, mainly, water vapor and ozone absorb solar radiation between the ground and 50 km height during the day. Tides propagate upward and they can be observed in, for example, the wind field. This work presents diurnal tides observed by meteor radars which measure wind between 80 and 100 km height.