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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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.