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Ann. Geophys., 29, 631-637, 2011
https://doi.org/10.5194/angeo-29-631-2011
© Author(s) 2011. This work is distributed under
the Creative Commons Attribution 3.0 License.
 
07 Apr 2011
Atmospheric wave induced O2 and OH airglow intensity variations: effect of vertical wavelength and damping
H. Takahashi1, A. Onohara1, K. Shiokawa2, F. Vargas3, and D. Gobbi1 1Aeronomy division, Instituto Nacional de Pesquisas Espaciais, São José dos Campos, Brazil
2Solar Terrestrial Environment Laboratory, Nagoya University, Nagoya, Japan
3Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, USA
Abstract. From nocturnal variations of the airglow O2 (0-1) and OH Meinel (6-2) band emission intensity and the rotational temperature, gravity waves and the damping effect in the MLT region were investigated. The data set was obtained from photometer measurements at Rikubetsu (43.5° N, 143.8° E), Japan, from March 2004 to August 2005. The ratio of the amplitude of oscillation and their phase difference between the two emissions were calculated when simultaneous periodic variations were observed. The ratio showed a linear correlation with the phase difference. The vertical wavelength and damping rate were estimated by using a model calculation carried out by previous works. The results show that the wave damping is significant when the vertical wavelength is shorter than 30–40 km. Krassovsky's parameter η, which represents a ratio between the emission intensity and temperature oscillations, was also calculated. The results show that the η also depends on the damping effect.

Citation: Takahashi, H., Onohara, A., Shiokawa, K., Vargas, F., and Gobbi, D.: Atmospheric wave induced O2 and OH airglow intensity variations: effect of vertical wavelength and damping, Ann. Geophys., 29, 631-637, https://doi.org/10.5194/angeo-29-631-2011, 2011.
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