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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 27, issue 4
Ann. Geophys., 27, 1625–1629, 2009
https://doi.org/10.5194/angeo-27-1625-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 27, 1625–1629, 2009
https://doi.org/10.5194/angeo-27-1625-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.

  06 Apr 2009

06 Apr 2009

Characteristics of equatorial gravity waves derived from mesospheric airglow imaging observations

S. Suzuki1, K. Shiokawa2, A. Z. Liu3, Y. Otsuka2, T. Ogawa2,*, and T. Nakamura4 S. Suzuki et al.
  • 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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