VARIATIONS OF THE CO_2,CH_4 AND N_2O CONCENTRATIONS AND δ^<13>C OF CO_2 IN THE GLACIAL PERIOD DEDUCED FROM AN ANTARCTIC ICE CORE, SOUTH YAMATO

• Main Authors: マチダ, トシノブ, ナカザワ, タカキヨ, ナリタ, ヒデキ, フジイ, ヨシユキ, アオキ, シュンジ, ワタナベ, オキツグ, MACHIDA, Toshinobu, NAKAZAWA, Takakiyo, NARITA, Hideki, FUJII, Yoshiyuki, AOKI, Shuhji, WATANABE, Okitsugu
• Language: English
• Published: National Institute of Polar Research 1996
• Subjects: Antarctic; Yamato; Antarc*; Antarctica; ice core; Polar meteorology and glaciology; Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology
• Online Access: https://nipr.repo.nii.ac.jp/record/3924/files/KJ00000767985.pdf; https://doi.org/10.15094/00003924; https://nipr.repo.nii.ac.jp/records/3924

P(論文) 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. departmental bulletin paper