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Abstract:

A-priori, rapid variations of solar activity that directly impact on the terrestrial environment should be expected to influence airglow brightness in the mesopause region via the photodissociative production of atomic oxygen, as it does on the time scale of the solar cycle. To find out whether this is supported by our midlatitude data, we analyze the strongest geoeffective solar activity events, in times when data from the Argentine airglow spectrometer were obtained. An alternative interaction path involving geomagnetic perturbations mediated by the solar wind can also be expected to affect the mesopause region. Daily mean values of different solar and geomagnetic activity indices, and more than 1400 nights of airglow brightness and rotational temperature measurements (mostly from El Leoncito, 31.8°S) are available for this study. The diagnostic value of this investigation is augmented by using information corresponding to two different nominal altitudes (87 km for the OH(6-2) band, and 95 km for the O2b(0-1) band). Our approach ranks the (solar and airglow) events by their respective strength, which automatically provides emphasis on the more important cases. We conclude that if an airglow response to strong solar events exists, it is only short-lived and should therefore most easily be detectable by daytime observations. On the other hand, we did not find signatures in our airglow data that could convincingly be related to geomagnetic storms. © 2007 COSPAR.

Registro:

Documento: Artículo
Título:Is there an influence of short-term solar activity variations on mesopause region airglow?
Autor:Scheer, J.; Reisin, E.R.
Filiación:Instituto de Astronomía y Física del Espacio, UBA-CONICET, Ciudad Universitaria, 1428 Buenos Aires, Argentina
Palabras clave:Airglow; Geomagnetic storms; Mesopause region; Solar activity; Solar flares; Earth atmosphere; Environmental impact; Luminance; Photodissociation; Spectrometers; Temperature measurement; Airglow; Geomagnetic storms; Mesopause region; Solar activity; Solar energy
Año:2007
Volumen:39
Número:8
Página de inicio:1248
Página de fin:1255
DOI: http://dx.doi.org/10.1016/j.asr.2007.01.002
Título revista:Advances in Space Research
Título revista abreviado:Adv. Space Res.
ISSN:02731177
CODEN:ASRSD
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02731177_v39_n8_p1248_Scheer

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Citas:

---------- APA ----------
Scheer, J. & Reisin, E.R. (2007) . Is there an influence of short-term solar activity variations on mesopause region airglow?. Advances in Space Research, 39(8), 1248-1255.
http://dx.doi.org/10.1016/j.asr.2007.01.002
---------- CHICAGO ----------
Scheer, J., Reisin, E.R. "Is there an influence of short-term solar activity variations on mesopause region airglow?" . Advances in Space Research 39, no. 8 (2007) : 1248-1255.
http://dx.doi.org/10.1016/j.asr.2007.01.002
---------- MLA ----------
Scheer, J., Reisin, E.R. "Is there an influence of short-term solar activity variations on mesopause region airglow?" . Advances in Space Research, vol. 39, no. 8, 2007, pp. 1248-1255.
http://dx.doi.org/10.1016/j.asr.2007.01.002
---------- VANCOUVER ----------
Scheer, J., Reisin, E.R. Is there an influence of short-term solar activity variations on mesopause region airglow?. Adv. Space Res. 2007;39(8):1248-1255.
http://dx.doi.org/10.1016/j.asr.2007.01.002