PRELIMINARY MEASUREMENT OF HIGH-FREQUENCY ELECTRICAL CONDUCTIVITY OF ANTARCTIC ICE WITH AC-ECM TECHNIQUE
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概要
- 論文の詳細を見る
We measured the high-frequency electrical conductivity of solid ice samples collected in the Antarctic ice sheet with a new technique called "AC-ECM (AC Electrical Conductivity Measurements)". The purpose was to establish a new convenient technique to detect variation of impurity content in ice cores with high spatial resolution and with high reproducibility for repetitive measurements. For this purpose, the conductance of the ice sample was measured with 2-terminal electrodes and with parallel-plate electrodes at 16 frequencies between 40Hz and 1MHz. Then both results of the conductance measured by these two different pairs of electrodes were compared to discuss the physical meaning of the signals measured with the new technique. The preliminary measurements were successful. We could measure conductance, which is proportional to the conductivity of ice, at frequencies above 100kHz at -20℃. The relaxation frequencies of Debye dispersion were higher when values of conductance were measured with the new technique, which suggested that surface conduction was dominant.
- 国立極地研究所の論文
著者
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Hondoh Takeo
Institute of Low Temperature Science, Hokkaido University
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Mae Shinji
Department of Applied Physics, Hokkaido University
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Fujita Shuji
Department of Applied Physics, Hokkaido University
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Morimoto S
National Institute Of Polar Research Organization Of Information And Systems
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Fujita Shuji
National Institute of Polar Research
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SUGIYAMA Ken
Department of Applied Physics, Faculty of Engineering, Hokkaido University
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Morimoto S
National Inst. Polar Res. Tokyo Jpn
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Fujita Shuji
Department Of Applied Physics Faculty Of Engineering Hokkaido University
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Mae S
National Institute Of Polar Research Research Organization Of Information And Systems
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Hondoh Takeo
Institute Of Low Temperature Science Hokkaido University
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Mae Shinji
Department Of Applied Physics Hokkaido University
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Mae Shinji
Department Of Applied Physics Faculty Of Engineering Hokkaido University
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SUEOKA Shigeru
Department of Applied Physics, Faculty of Engineering, Hokkaido University
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Sugiyama Ken
Department Of Applied Physics Faculty Of Engineering Hokkaido University
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Sueoka Shigeru
Department Of Applied Physics Faculty Of Engineering Hokkaido University
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Mae Shinji
National Institute For Resources And Environment
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Fujita Shuji
Faculty Of Engineering Hokkaido University
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