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*Ikumi Oyabu
Graduate school of Environmental Science, Hokkaido University Institute of Low Temperature Science, Hokkaido University
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Yoshinori Iizuka
Institute of Low Temperature Science, Hokkaido University
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Ryu Uemura
Faculty of Science, University of the Ryukyus
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Motohiro Hirabayashi
National Institute of Polar Research
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Takayuki Miyake
National Institute of Polar Research
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Hideaki Motoyama
National Institute of Polar Research
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Toshimitsu Sakurai
Institute of Low Temperature Science, Hokkaido University Institute for Laser Technology
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Toshitaka Suzuki
Faculty of Science, Yamagata University
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Takeo Hondoh
Institute of Low Temperature Science, Hokkaido University