HR: 0800h
AN: SA41A-1047    [Abstracts]
TI: A curved gravity-wave structure in the mesospheric airglow images
AU: * Suzuki, S
EM: shin@stelab.nagoya-u.ac.jp
AF: Solar-Terrestrial Environment Laboratory, Nagoya University, Honohara 3-13, Toyokawa, 442-8507 Japan
AU: Shiokawa, K
EM: shiokawa@stelab.nagoya-u.ac.jp
AF: Solar-Terrestrial Environment Laboratory, Nagoya University, Honohara 3-13, Toyokawa, 442-8507 Japan
AU: Nakamura, K
EM: nakamura@hyarc.nagoya-u.ac.jp
AF: Hydrospheric Atmospheric Research Center, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8601 Japan
AU: Otsuka, Y
EM: otsuka@stelab.nagoya-u.ac.jp
AF: Solar-Terrestrial Environment Laboratory, Nagoya University, Honohara 3-13, Toyokawa, 442-8507 Japan
AU: Ogawa, T
EM: ogawa@stelab.nagoya-u.ac.jp
AF: Solar-Terrestrial Environment Laboratory, Nagoya University, Honohara 3-13, Toyokawa, 442-8507 Japan
AU: Nakamura, T
EM: nakamura@kurasc.kyoto-u.ac.jp
AF: Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji, 611-0011 Japan
AB: We found a unique wave structure, which had arc-like curved wave fronts in high contrast, by using an all-sky airglow imager located at Shigaraki (34.9N, 136.1E) on October 3, 2002. The curved structures were identified over 2.5 hours (1330-1600UT: 2230-0100LT) both in the OI (557.7 nm, emission altitude: 96 km) and OH-band (720-910 nm, 86 km) images. The wave structures had a wavelength of about 40 km and propagated northeastward with a horizontal phase velocity of about 100 m/s. Assuming that each wave pattern originated from a point source in the troposphere, the center of the curvature was projected on the sea near the tip of the Kii peninsula (33.5N, 135.1E). In the presentation, we will discuss three-dimensional structure of the curved pattern of gravity waves using image data of two airglow emissions at different altitudes, background wind data obtained simultaneously by the MU radar, and meteorological data obtained from ground and satellite.
DE: 0310 Airglow and aurora
DE: 0689 Wave propagation (4275)
SC: SPA-Aeronomy [SA]
MN: 2004 AGU Fall Meeting