Special Issue: Dynamics and Structure of the Mesopause Region (DYSMER)
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Seasonal variations of gravity wave structures in OH airglow with a CCD imager at Shigaraki
Earth, Planets and Space volume 51, pages 897–906 (1999)
A wideview CCD imager for OH airglow observations was operated at the MU radar site in Shigaraki, Japan (35°N, 136°E). From the 18 months’ observation, dominant gravity wave components in the OH images are extracted, and seasonal variation of the characteristics of the waves is investigated. These waves typically have short horizontal wavelengths (5 km–60 km) and short periods (5 min–30 min), with horizontal phase speeds of 0–100 m/s. All the wave events are separated into two groups by a boundary of a horizontal wavelength of 17.5 km, which is close to the boundary between ripples and bands. For the waves with larger horizontal wavelengths, the horizontal propagation direction showed clear seasonal variation with summer eastward and winter westward preferences, with a change of direction in mid-March and at the end of September. This suggests that these waves are propagated from the lower atmosphere and filtered in the middle atmosphere by the mean winds. However, the small scale waves propagate in almost all azimuths with a slight seasonal variation. Therefore, in-situ generation would be the major source of such waves although the wavelength as a physical boundary between the two groups could be smaller than 17.5 km. The seasonal variation of the wave parameters especially between summer/winter and equinoctial months is also discussed. The waves with small horizontal wavelengths (<15 km), longer periods (>10 min), and slow horizontal phase speeds (<30 m/s) are mainly seen in summer/winter.
Armstrong, E. B., Irregularities in the 80–100 km region: A photographic approach, Radio Sci., 21, 313, 1986.
Clairemidi, J., M. Herse, and G. Moreels, Bi-dimensional observation of waves near the mesopause at auroral latitudes, Planet. Space Sci., 33, 1013–1022, 1985.
Fritts, D. C., J. R. Isler, G. Thomas, and O. Andreassen, Wave breaking signatures in noctilucent clouds, Geophys. Res. Lett., 20, 2039–2042, 1993.
Fritts, D. C., J. R. Isler, J. H. Hecht, R. L. Walterscheid, and Ø. Andreassen, Wave breaking signature in sodium densities and OH nightglow, 2. Simulation of wave and instability structure, J. Geophys. Res., 102, 6669–6684, 1997.
Gardner, C. S. and M. J. Taylor, Observational limits for lidar, radar, and airglow imager measurements of gravity wave parameters, J. Geophys. Res., 103, 6427–6437, 1998.
Hecht, J. H., R. L. Walterscheid, D. C. Fritts, J. R. Isler, D. C. Senft, C. S. Gardner, and S. J. Franke, Wave breaking signature in OH airglow and sodium densities and temperatures 1. Airglow imaging, Na lidar, and MF radar observations, J. Geophys. Res., 102, 6655–6668, 1997.
Isler, J. R., M. J. Taylor, and D. C. Fritts, Observational evidence of wave ducting and evanescence in the mesosphere, J. Geophys. Res., 102, 26301–26313, 1997.
Lindzen, R. S., Turbulence and stress owing to gravity wave and tidal breakdown, J. Geophys. Res., 86, 9707–9714, 1981.
Manson, A. H. and C. E. Meek, Gravity wave propagation characteristics (60–120 km) as determined by the Saskatoon MF Radar (GRAVNET) system: 1983–85 at 52°N, 107°W, J. Atmos. Sci., 45, 932–946, 1988.
Nakamura, T., T. Tsuda, M. Yamamoto, S. Fukao, and S. Kato, Characteristics of gravity waves in the mesosphere observed with the MU radar, 1. Momentum flux, J. Geophys. Res., 98, 8899–8910, 1993a.
Nakamura, T., T. Tsuda, M. Yamamoto, S. Fukao, and S. Kato, Characteristics of gravity waves in the mesosphere observed with the MU radar, 2. Propagation direction, J. Geophys. Res., 98, 8911–8923, 1993b.
Peterson, A. W., Airglow events visible to the naked eye, App. Opt., 18, 3390, 1979.
Shiokawa, K., Y. Katoh, M. Satoh, M. K. Ejiri, T. Ogawa, T. Nakamura, T. Tsuda, and R. H. Wiens, Development of Optical Mesosphere Thermosphere Imagers (OMTI), Earth Planets Space, 51, this issue, 887–896, 1999.
Taylor, M. J. and M. A. Hapgood, Identification of a thunderstorm as a source of short period gravity waves in the upper atmospheric nightglow emission, Planet. Space Sci., 36, 975–985, 1988.
Taylor, M. J. and M. A. Hapgood, On the origin of ripple-type wave structure in the OH nightglow emission, Planet. Space Sci., 38, 1421–1430, 1990.
Taylor, M. J., M. A. Hapgood, and P. Rothwell, Observations of gravity wave propagation in the OI (5577 nm), Na (589.2 nm) and the near infrared OH nightglow emissions, Planet. Space Sci., 35, 413–427, 1987.
Taylor, M. J., E. H. Ryan, T. F. Tuan, and R. Edwards, Evidence of preferential directions for gravity wave propagation due to wind filtering in the middle atmosphere, J. Geophys. Res., 98, 6047–6057, 1993.
Taylor, M. J., M. B. Bishop, and V. Taylor, All-sky measurements of short period waves imaged in the OI (557.7 nm), Na (589.2 nm) and near infrared OH and O2 (0, 1) nightglow emissions during the ALOHA-93 campaign, Geophys. Res. Lett., 22, 2833–2836, 1995.
Taylor, M. J., W. R. Pendleton, Jr., S. Clark, H. Takahashi, D. Gobbi, and R. A. Goldberg, Image measurements of short period gravity waves at equatorial latitudes, J. Geophys. Res., 102, 26283–26299, 1997.
Tsuda, T., Y. Murayama, M. Yamamoto, S. Kato, and S. Fukao, Seasonal variation of momentum flux in the mesosphere observed with the MU radar, Geophys. Res. Lett., 17, 725–728, 1990.
Tsuda, T., Y. Murayama, T. Nakamura, R. A. Vincent, A. H. Manson, C. E. Meek, and R. L. Wilson, Variations of the Gravity Wave Characteristics with Height, Season and Latitude Revealed by Comparative Observations, J. Atmos. Terr. Phys., 56, 555–568, 1994.
Wu, Q. and T. L. Killeen, Seasonal Dependence of Mesospheric Gravity Waves (<100 km) at Peach Mountain Observatory, Michigan, Geophys. Res. Lett., 23, 2211–2214, 1996.
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Nakamura, T., Higashikawa, A., Tsuda, T. et al. Seasonal variations of gravity wave structures in OH airglow with a CCD imager at Shigaraki. Earth Planet Sp 51, 897–906 (1999). https://doi.org/10.1186/BF03353248
- Gravity Wave
- Phase Speed
- Middle Atmosphere
- Mesopause Region
- Horizontal Wavelength