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Ann. Geophys., 26, 1049-1056, 2008
www.ann-geophys.net/26/1049/2008/
© European Geosciences Union 2008
Response of the mesopause airglow to solar activity inferred from measurements at Zvenigorod, Russia
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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