Japan Geoscience Union Meeting 2015

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International Session (Oral)

Symbol P (Space and Planetary Sciences) » P-EM Solar-Terrestrial Sciences, Space Electromagnetism & Space Environment

[P-EM11] New frontier: Observations of the middle and upper atmospheres from ISS

Mon. May 25, 2015 9:00 AM - 10:45 AM A01 (APA HOTEL&RESORT TOKYO BAY MAKUHARI)

Convener:*Akinori Saito(Department of Geophysics, Graduate School of Science, Kyoto University), Mitsuteru Sato(Department of Cosmoscience, Hokkaido University), Yuichi Otsuka(Solar-Terrestrial Environment Laboratory, Nagoya University), Tomoo Ushio(Information and communication engineering department, Osaka University), Makoto Suzuki(Institute for Space and Astronautical Sciences, Japan Aerospace Exploration Agency), Chair:Akinori Saito(Department of Geophysics, Graduate School of Science, Kyoto University), Yuichi Otsuka(Solar-Terrestrial Environment Laboratory, Nagoya University)

10:00 AM - 10:15 AM

[PEM11-11] Airglow image of mesospheric mesoscale wave captured from the International Space Station

*Yuta HOZUMI1, Akinori SAITO1, Takeshi SAKANOI2, Yusuke AKIYA1, Atsushi YAMAZAKI3 (1.Department of Geophysics, Graduate School of Science, Kyoto University, 2.Planetary Plasma and Atmospheric Research Center, Graduate School of Science, Tohoku University, 3.Institute of Space and Astronautical Science / Japan Aerospace Exploration Agency)

Keywords:airglow, gravity wave

Mesoscale wave-like structures in the mesospheric airglow were captured by an imaging observation from the International Space Station. Limb imaging observations with a digital single reflex camera provided us the horizontal structure of mesospheric airglow with unprecedentedly wide field-of-view(FOV). The FOV is 3,000 km width at the tangential point. Previous airglow observations captured small scale (10 - 400 km) structures by ground based airglow imagers and large scale (several 1,000s km) structures by satellite limb scanning. Our observation captured mesoscale wave-like structure, whose wavelength is about 1,000 km, and filled the gap of the previous observation. A data on August 26, 2015 shows wavelike oscillation in both peak intensity and layer height for OI, Na and OH airglow. Its wavelength is about 1,000 km and the wave existed region is about 2,500 x 3,000 km size over the Indian ocean and Australia. In the presentation, the cause of this structure will be discussed.