AbstractPlanetary scale waves in the equatorial upper mesosphere were studied by measuring the airglow OI557.7nm, O2b(0,1) and OH(6,2) emission intensities and OH rotational temperature at São João do Cariri (7.4°S; 36.5°W). From four years of data, 1998–2001, periodic oscillations of the airglow emissions were analyzed using the Lomb–Scargle spectral analysis. An oscillation of 3–4 days was frequently observed, which might be ultra-fast Kelvin waves. No seasonal dependency of the wave activity was found. On some occasions we found a quasi-5-day oscillation with a phase difference between the emissions, suggesting an upward energy flow. This is interpreted as a normal mode Rossby wave.


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    Title :

    Equatorial planetary waves in the mesosphere observed by airglow periodic oscillations


    Contributors:
    Buriti, R.A. (author) / Takahashi, H. (author) / Lima, L.M. (author) / Medeiros, A.F. (author)

    Published in:

    Advances in Space Research ; 35 , 11 ; 2031-2036


    Publication date :

    2005-07-06


    Size :

    6 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English