Physics
Scientific paper
Apr 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004jastp..66..567b&link_type=abstract
Journal of Atmospheric and Solar-Terrestrial Physics, Volume 66, Issue 6-9, p. 567-572.
Physics
5
Airglow, Rotational Temperature, Semiannual Oscillation, Tide Waves, Mesosphere
Scientific paper
The intensities of the upper mesospheric airglow emissions, OI5577, O2b(0,1), and OH(6,2), together with the rotational temperature of the OH band, have been observed at an equatorial station, Sa~o Joa~o do Cariri (7.4°S,36.5°W), during the PSMOS observation period from 1998 to 2001. All of the emissions show distinct semiannual variations, maxima at the equinoxes and minima at the solstices. The October-November maximum of OI5577 intensity is larger than that of March-April, and the opposite is true for the case of OH(6,2). Also, there are strong OI5577 and O2b intensity depletions during a short period in December, absent in the case of the OH emission. Harmonic analysis of the time series suggests that atmospheric tidal oscillations play an important role in the observed semiannual oscillation.
Buriti Ricardo A.
de Medeiros Amauri F.
Gobbi Delano
Lima L. M.
Nepomuceno A. A.
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