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| Titel |
Mesospheric energy loss rates by OH and O2 emissions at 23°S |
| VerfasserIn |
P. R. Fagundes, D. Gobbi, H. Takahashi, Y. Sahai |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 15, no. 6 ; Nr. 15, no. 6, S.797-804 |
| Datensatznummer |
250012842
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| Publikation (Nr.) |
 copernicus.org/angeo-15-797-1997.pdf |
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| Zusammenfassung |
| The nightglow OH(9, 4) and O2 atmospheric (0,1) band
emission intensities and their rotational temperatures T(OH) and T(O2),
respectively, observed at Cachoeira Paulista (23°S, 45°W),
Brazil, during the period from October 1989 to December 1990, have been analyzed
to study the nighttime mesospheric energy loss rates through the radiations from
the vibrationally excited OH* and electronically excited O2*
bands. The total emission rates of the OH Meinel bands, O2
atmospheric (0,0) and O2 infrared atmospheric (1Δg)
bands were calculated using reported data for the relative band intensities I(ν'',ν')/I(9,4), IO2A(0,0)/IO2A(0,1)
and IO2(1Δg)/IO2A(0,1).
It was found that there is a minimum in equivalent energy loss rate by the OH*
Meinel bands during December/January (equivalent energy loss rate of 0.39K/day*,
where day* means averaged over the night) and maximum in
equivalent energy loss rate during September (equivalent energy loss rate of
0.98K/day*). Energy loss rate by the O2*
radiation, on the other hand, is weaker than that by the OH*
Meinel bands, showing equivalent energy loss rates of 0.12K/day*
and 0.22K/day* during January and September, respectively. |
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