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www.ann-geophys.net/27/1625/2009/
© Author(s) 2009. This work is distributed
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Characteristics of equatorial gravity waves derived from mesospheric airglow imaging observations
1Sugadaira Space Radio Observatory, University of Electro-Communications, Chofu, Tokyo, Japan
2Solar-Terrestrial Environment Laboratory, Nagoya University, Nagoya, Aichi, Japan
3Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
4Research Institute for Sustainable Humanosphere, Kyoto University, Uji, Kyoto, Japan
*now at: National Institute of Information and Communications Technology, Koganei, Tokyo, Japan
Abstract. We present the characteristics of small-scale (<100 km) gravity waves in the equatorial mesopause region derived from OH airglow imaging observations at Kototabang (100.3° E, 0.2° S), Indonesia, from 2002 to 2005. We adopted a method that could automatically detect gravity waves in the airglow images using two-dimensional cross power spectra of gravity waves. The propagation directions of the waves were likely controlled by zonal filtering due to stratospheric mean winds that show a quasi-biennial oscillation (QBO) and the presence of many wave sources in the troposphere.
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Citation: Suzuki, S., Shiokawa, K., Liu, A. Z., Otsuka, Y., Ogawa, T., and Nakamura, T.: Characteristics of equatorial gravity waves derived from mesospheric airglow imaging observations, Ann. Geophys., 27, 1625-1629, 2009. Bibtex EndNote Reference Manager
