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Airglow imaging; ANGWIN; Antarctica; Critical level filtering; Mesospheric gravity wave; Spectral analysis
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Characteristics Of Mesospheric Gravity Waves Over Antarctica Observed By Antarctic Gravity Wave Instrument Network Imagers Using 3-D Spectral Analyses, Takashi S. Matsuda, Takuji Nakamura, Mitsumu K. Ejiri, Masaki Tsutsumi, Joshihiro Tomikama, Michael J. Taylor, Yucheng Zhao, P.-Dominique Pautet, Damian J. Murphy, Tracy Moffat-Griffin
Characteristics Of Mesospheric Gravity Waves Over Antarctica Observed By Antarctic Gravity Wave Instrument Network Imagers Using 3-D Spectral Analyses, Takashi S. Matsuda, Takuji Nakamura, Mitsumu K. Ejiri, Masaki Tsutsumi, Joshihiro Tomikama, Michael J. Taylor, Yucheng Zhao, P.-Dominique Pautet, Damian J. Murphy, Tracy Moffat-Griffin
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We have obtained horizontal phase velocity distributions of the gravity waves around 90 km from four Antarctic airglow imagers, which belong to an international airglow imager/instrument network known as ANGWIN (Antarctic Gravity Wave Instrument Network). Results from the airglow imagers at Syowa (69°S, 40°E), Halley (76°S, 27°W), Davis (69°S, 78°E), and McMurdo (78°S, 167°E) were compared, using a new statistical analysis method based on 3-D Fourier transform (Matsuda et al., 2014) for the observation period between 7 April and 21 May 2013. Significant day-to-day and site-to-site differences were found. The averaged phase velocity spectrum during the observation period showed preferential …