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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 26, issue 5
Ann. Geophys., 26, 1049-1056, 2008
https://doi.org/10.5194/angeo-26-1049-2008
© Author(s) 2008. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: Atmospheric studies by optical methods

Ann. Geophys., 26, 1049-1056, 2008
https://doi.org/10.5194/angeo-26-1049-2008
© Author(s) 2008. This work is distributed under
the Creative Commons Attribution 3.0 License.

  28 May 2008

28 May 2008

Response of the mesopause airglow to solar activity inferred from measurements at Zvenigorod, Russia

N. Pertsev and V. Perminov N. Pertsev and V. Perminov
  • A. M. Obukhov Institute of Atmospheric Physics, Pyzhevskiy per., 3, Moscow, 119017, Russia

Abstract. Ground-based spectrographical observations of infrared emissions of the mesopause region have been made at Zvenigorod Observatory (56 N, 37 E), located near Moscow, Russia, for 670 nights of 2000–2006. The characteristics of the hydroxyl and molecular oxygen (865 nm) airglow, heights of which correspond to 87 and 94 km, are analyzed for finding their response to solar activity. The measured data exhibit a response to the F10.7 solar radio flux change, which is 30%–40%/100 sfu in intensities of the emissions and about 4.5 K/100 sfu in hydroxyl temperature. Seasonal variations of the airglow response to solar activity are observed. In winter it is more significant than in summer. Mechanisms that may provide an explanation of the solar influence on intensities of the emissions and temperature are considered. Radiative processes not involving atmospheric dynamics appear insufficient to explain the observed effect.

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