MEASUREMENTS OF THE OXYGEN ISOTOPIC RATIO OF ATMOSPHERIC CO_2 AT SYOWA STATION, ANTARCTICA

元データ 国立極地研究所

概要

Ground-based and aircraft measurements of the δ^<18>O of atmospheric CO_2 were made at Syowa Station, Antarctica during 1989 and 1990. To minimize the possibility of exchange of oxygen atoms between CO_2 and water during storage in sampling flasks, CO_2 was extracted from each air sample at the station within a few days of its collection. The maximum of the seasonal δ^<18>O cycle at the station appeared in summer and the minimum in winter. The peak-to-peak amplitude of the cycle was 0.27‰. δ^<18>O of CO_2 was slightly lower in the upper troposphere than in the middle and lower troposphere over the station during the measurement period. These results are in good agreement with those at Cape Grim, Tasmania and over Bass Strait. From a comparison of the CO_2 measurements at and over Syowa Station and δ^<18>O at other stations, it is suggested that seasonally dependent atmospheric transport to the Antarctic region is one of the important processes determining the seasonal cycle and the height variation of δ^<18>O of CO_2 at the station.

著者

張 紀久夫 阪大基:福井工大工
HAYASHI Masahiko Solar Terrestrial Environment Laboratory, Nagoya University
Takata Morimasa National Institute Of Polar Research
Kawaguchi Sadao Nagaoka National College Of Technology
Morimoto S National Institute Of Polar Research Organization Of Information And Systems
Shimohara Kimiko Kitami Institute of Technology
Nakazawa Takakiyo Center for Atmospheric and Oceanic Studies, Tohoku University
Aoki Shuhji Center for Atmospheric and Oceanic Studies, Graduate School of Science, Tohoku University
Morimoto Shinji National Institute of Polar Research
Nakazawa Takakiyo Center For Atmospheric And Oceanic Studies Graduate School Of Science Tohoku University
MURAYAMA Shohei National Institute for Resources and Environment
SHIMIZU Akira National Institute for Environmental Studies
KAWAGUCHI Sadao National Institute of Polar Research
TANAKA Masayuki Center for Atmospheric and Oceanic Studies, Faculty of Science, Tohoku University
AOKI Shuhji National Institute of Polar Research
Aoki Shuhji Center For Atmospheric And Oceanic Studies Faculty Of Science Tohoku University
Murayama Shohei National Inst. Of Advanced Industrial Sci. And Technol. (aist)
Morimoto S National Inst. Polar Res. Tokyo Jpn
清水 明 東大教養
Aoki Shuji Center For Atmospheric And Oceanic Studies Graduate School Of Sci. Tohoku Univ.
Aoki Shuhji Faculty Of Science Tohoku University
Kanamori Satoru National Institute of Polar Research
Mae S National Institute Of Polar Research Research Organization Of Information And Systems
Tanaka Masayuki Center For Atmospheric And Oceanic Studies Faculty Of Science Tohoku University
Satow Kazuhide Nagoya Technical College
Mae Shinji Department Of Applied Physics Hokkaido University
Hayashi Masahiko Solar Terrestrial Environment Laboratory Nagoya University
Nakazawa Takakiyo Center For Atmospheric And Oceanic Studies Faculty Of Science
清水 明 Center For Atmospheric And Oceanic Studies Graduate School Of Science Tohoku University
Mae S Hokkaido Univ. Sapporo
Shinbori K Hokkaido Univ. Sapporo
Nakazawa T Center For Atmospheric And Oceanic Studies Faculty Of Science
Kawaguchi Sadao Nagoya University
Tanaka Masayuki Department Of Materials Science And Processing Graduate School Of Engineering Osaka University
Mae Shinji National Institute For Resources And Environment
Shinbori K Nagaoka National College Of Technology
Morimoto Shinji National Institute For Resources And Environment

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