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Abstract:

Airglow intensities and rotational temperatures of the OH(6-2) and O2b(0-1) bands acquired at El Leoncito (32°S, 69°W) provide good annual coverage in 1998-2002, 2006, and 2007, with between 192 and 311 nights of observation per year. These data can therefore be used to derive the seasonal variations during each of these seven years, in airglow brightness and temperatures at altitudes of 87 and 95 km. From 1998 to 2001, seasonal variations are similar enough so that they can be well represented by a mean climatology, for each parameter. On the other hand, these climatologies do not agree with what is usually observed at other sites, maybe due to the particular orographic conditions at El Leoncito. With respect to the last three fully documented years (2002, 2006, and 2007), the similarity from year to year deteriorates, and there are greater differences in the seasonal behaviour, more or less in all the parameters. The differences include, e.g., maxima occurring earlier or later than "normal", by one or two months. All this may suggest the build-up of a new regime of intraseasonal variability, with a possible relationship to corresponding changes in wave activity. © 2009 COSPAR.

Registro:

Documento: Artículo
Título:Evidence of change after 2001 in the seasonal behaviour of the mesopause region from airglow data at El Leoncito
Autor:Reisin, E.R.; Scheer, J.
Filiación:Instituto de Astronomía y Física del Espacio (CONICET-UBA), C.C. 67, Suc. 28, 1428 Buenos Aires, Argentina
Palabras clave:Airglow; Climatology; Interannual variation; Mesopause region; Seasonal variation; Temperature; Airglow; Airglow data; Interannual variation; Intraseasonal variability; Mesopause region; Rotational temperature; Seasonal variation; Wave activity; Climatology
Año:2009
Volumen:44
Número:3
Página de inicio:401
Página de fin:412
DOI: http://dx.doi.org/10.1016/j.asr.2009.04.007
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_v44_n3_p401_Reisin

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Citas:

---------- APA ----------
Reisin, E.R. & Scheer, J. (2009) . Evidence of change after 2001 in the seasonal behaviour of the mesopause region from airglow data at El Leoncito. Advances in Space Research, 44(3), 401-412.
http://dx.doi.org/10.1016/j.asr.2009.04.007
---------- CHICAGO ----------
Reisin, E.R., Scheer, J. "Evidence of change after 2001 in the seasonal behaviour of the mesopause region from airglow data at El Leoncito" . Advances in Space Research 44, no. 3 (2009) : 401-412.
http://dx.doi.org/10.1016/j.asr.2009.04.007
---------- MLA ----------
Reisin, E.R., Scheer, J. "Evidence of change after 2001 in the seasonal behaviour of the mesopause region from airglow data at El Leoncito" . Advances in Space Research, vol. 44, no. 3, 2009, pp. 401-412.
http://dx.doi.org/10.1016/j.asr.2009.04.007
---------- VANCOUVER ----------
Reisin, E.R., Scheer, J. Evidence of change after 2001 in the seasonal behaviour of the mesopause region from airglow data at El Leoncito. Adv. Space Res. 2009;44(3):401-412.
http://dx.doi.org/10.1016/j.asr.2009.04.007