OXYGEN ISOTOPE PROFILES OF DEPOSITED SNOW IN DIFFERENT DEPOSITIONAL ENVIRONMENTS OF THE ANTARCTIC ICE SHEET
スポンサーリンク
概要
- 論文の詳細を見る
Vertical profiles of oxygen isotopic contents in deposited snow were obtained in the region where katabatic winds prevail (Mizuho Station : 70.7°S, 44.3°E, 2230m), the inland dome-like plateau (Dome Camp : 77.0°S, 35.0°E, 3761m) and the transitional zone between them (Advance Camp : 74.2°S, 35.0°E, 3198m). Ten profiles from a snow trench 10m wide and 1m deep, a profile from a snow pit 3m deep and that from a snow pit 5m deep were obtained at Mizuho Station, Advance Camp and Dome Camp, respectively. Snow layers were dated on the basis of stake measurements at Mizuho Station, a peak of tritium content (in 1966) at Advance Camp and peaks of tritium and gross β activities (in 1965,1955) at Dome Camp. At Mizuho Station, δ^<18>O contents have high values around the hiatus layers. However, synchronous relations cannot be found between neighboring profiles, since snow was exchanged due to deposition and erosion by strong winds. Inter-annual variations of oxygen isotopic contents in snow have been preserved better in the inner parts of the ice sheet between the three zones observed in this study. The profile at Dome Camp has good correlation with the inter-annual variation of summer temperature at 5000gpm above the South Pole. This result suggests that the temperature at this level above the South Pole is representative for air temperature condition over the inland ice sheet, and the meteorological conditions in summer have a strong effect on the transition of the oxygen isotopic content of snow after deposition due to evaporation-sublimation.
- 国立極地研究所の論文
著者
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Satow Kazuhide
Nagaoka National College of Technology
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Ageta Yutaka
Graduate School of Environmental Studies, Nagoya University
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Kamiyama Kokichi
Geophysical Research Station Kyoto University
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Kawaguchi Sadao
Nagaoka National College Of Technology
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Ageta Yutaka
Graduate School Of Environmental Studies Nagoya University
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Ageta Yutaka
Water Research Laboratory Nagoya University
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Shimohara Kimiko
Kitami Institute of Technology
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Narita Hideki
Institute Of Low Temperature Science Pan-okhotsk Research Center Hokkaido University
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Kawaguchi Sadao
Fac. Of Agr. Kyushu Univ.
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Ageta Yutaka
Atmospheric And Hydrospheric Research Institute Nagoya University
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Ageta Y
Graduate School Of Environmental Studies Nagoya University
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Ageta Yutaka
Water Research Institute Nagoya University
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Narita Hideki
Institute Of Low Temperature Science Hokkaido University
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Satow Kazuhide
Nagaoka College Of Technology
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Kawada Kunio
Department Earth Science Toyama University
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Kawaguchi S
Kyushu Univ.
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Shinbori K
Hokkaido Univ. Sapporo
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Koga S
National Inst. Resources And Environment Tsukuba
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