Equatorial planetary wave signatures observed in mesospheric airglow emissions

Details Equatorial planetary wave signatures observed in mesospheric airglow emissions Equatorial planetary wave signatures observed in mesospheric airglow emissions

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002jastp..64.1263t&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 64, Issue 8-11, p. 1263-1272.

Physics

8

Scientific paper

The upper mesospheric airglow emissions, OI 557.7nm, NaD 589.3nm, OH (6,2) and O2 atmospheric (0,1) band have been measured using a ground-based multichannel airglow photometer in the equatorial region, Sa~o Joa~o do Cariri (7°S, 37°W), Brazil. Good weather condition made it possible to study nocturnal and day to day variation of the emission rates continuously for more than 12 days per month from January to December 1998. It is found that there are distinct 2- and 3.5-day period oscillations in the emission rates, those are most probably due to Rossby-gravity wave and Kelvin wave, respectively. The amplitudes of oscillation of the Kelvin wave are large in June and July, being 40% for OI5577, 23% for O2b (0,1) and 26% for OH(6,2).

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