PRELIMINARY RESULTS FROM RADON OBSERVATION AT SYOWA STATION, ANTARCTICA, DURING 1996
スポンサーリンク
概要
- 論文の詳細を見る
The concentration of ^<222>Rn in surface air was measured for the first time at Syowa Station, Antarctica in the period September 1996-January 1997 by an electrostatic collection method. The concentration of ^<222>Rn was higher in the first half than the latter half of the monitoring period. Daily mean ^<222>Rn concentration averaged 270mBq/m^3 for the first half of the period and 150mBq/m^3 for the latter half of the period. The maximum daily mean ^<222>Rn concentration was 630mBq/m^3,and the minimum concentration was 70mBq/m^3. The daily mean values were higher than those measurement in previous studies in Antarctica. Remarkable ^<222>Rn concentration increases (radon storms), which accompanied cyclones, were observed twice during the austral spring at Syowa Station. The first radon storm occurred on 18-21 September and the second on 16-20 October 1996. The daily mean ^<222>Rn concentrations in the first and second radon storms attained 530mBq/m^3 and 630mBq/m^3 respectively. On the other hand, the hourly mean ^<222>Rn concentration attained 1200mBq/m^3 in the second event. This implies that the ^<222>Rn concentrations vary on a short time scale. The main feature of the ^<222>Rn concentration record corresponds to intense mixing of air masses from mid-latitude continents to Antarctica. This implies that the variations of ^<222>Rn may be related to the wind direction. The concentrations of ^<222>Rn seem to increase with southerly wind and decrease with northerly or northeasterly wind.
- 国立極地研究所の論文
著者
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Iwasaka Y
Graduate School Of Environmental Studies Nagoya Univ.
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Iwasaka Yasunobu
Solar-terrestrial Environment Laboratory Nagoya University
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Iwasaka Y
Nagoya Univ. Nagoya Jpn
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Osada Kazuo
Solar Terrestrial Environment Laboratory, Nagoya University
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HAYASHI Masahiko
Solar Terrestrial Environment Laboratory, Nagoya University
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Iwasaka Y
Solar-terrestrial Environment Laboratory Nagoya University
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Osada Kazuo
Meteorological Research Institute
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Iwasaka Yasunobu
Graduate School Of Environmental Studies Nagoya Univ.
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Iwasaka Yasunobu
Unmanned Aircraft Planning Group:solar Terrestrial Environmental Laboratory Nagoya University:nihon
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UI Hirotaka
Laboratory of Global Environment, Faculty of Education, Toyama University
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TASAKA Shigeki
Faculty of Education, Gifu University
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Iwasaka Yasunobu
Solar Terrestrial Environment Laboratory Nagoya University
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Ui Hirotaka
Department Of Education Toyama University
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Tasaka Shigeki
Faculty Of Education Gifu University
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Hayashi Masahiko
Solar Terrestrial Environment Laboratory Nagoya University
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Satoh Takashi
Geological Survey Of Japan Aist
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Osada K
Graduate School Of Environmental Studies Nagoya University
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Tasaka S
Geological Survey Of Japan National Institute Of Advanced Industrial Science And Technology (aist)
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TASAKA Shigeki
Department of Physics, Nagoya University
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