VARIATIONS OF THE CO_2,CH_4 AND N_2O CONCENTRATIONS AND δ^C OF CO_2 IN THE GLACIAL PERIOD DEDUCED FROM AN ANTARCTIC ICE CORE, SOUTH YAMATO

元データ 国立極地研究所

概要

To reconstruct variations of atmospheric greenhouse gases in the glacial period, air in an ice core recovered from a bare ice field in the southern part of the Yamato Mountains, Antarctica was extracted and then the CO_2,CH_4 and N_2O concentrations and δ^<13>C of CO_2 were analyzed. The CO_2,CH_4 and N_2O concentrations were obviously lower than the pre-industrial Holocene values, suggesting that this ice core was formed in the glacial period. The variations of the CO_2,CH_4 and N_2O concentrations during the glacial period showed a good correlation with that of δ^<18>O of ice from the core. The CO_2 concentrations varied almost opposite in phase with δ^<13>C, which implies that CO_2 with isotopically light carbon was added to or subtracted from the atmosphere in the glacial period.

著者

Watanabe Okitsugu National Institute of Polar Research, Research Organization of Information and Systems
Fujii Yoshiyuki National Institute of Polar Research, Research Organization of Information and Systems
Narita Hideki Institute of Low Temperature Science Pan-Okhotsk Research Center, Hokkaido University
張 紀久夫 阪大基:福井工大工
Watanabe Okitsugu National Institute Of Polar Research
Nakazawa Takakiyo Center for Atmospheric and Oceanic Studies, Tohoku University
Narita Hideki Institute Of Low Temperature Science Pan-okhotsk Research Center Hokkaido University
Nakazawa Takakiyo Center For Atmospheric And Oceanic Studies Graduate School Of Science Tohoku University
AOKI Shuhji National Institute of Polar Research
Aoki S Center For Atmospheric And Oceanic Studies Graduate School Of Science Tohoku University
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
Narita Hideki Institute Of Low Temperature Science Hokkaido University
Fujii Yoshiyuki National Institute Of Polar Research
Watanabe Okitsusgu National Institute of Polar Research
MACHIDA Toshinobu Center for Atmospheric and Oceanic Studies, Faculty of Science, Tohoku University
Nakazawa Takakiyo Center For Atmospheric And Oceanic Studies Graduate School Of Sci. Tohoku Univ.
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
Nakazawa T Center For Atmospheric And Oceanic Studies Faculty Of Science

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