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Ratios of Mg2+/Na+ in snowpack and an ice core at Austfonna ice cap, Svalbard, as an indicator of seasonal melting

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タイトル: Ratios of Mg2+/Na+ in snowpack and an ice core at Austfonna ice cap, Svalbard, as an indicator of seasonal melting
著者: Iizuka, Yoshinori 著作を一覧する
Igarashi, Makoto 著作を一覧する
Kamiyama, Kokichi 著作を一覧する
Motoyama, Hideaki 著作を一覧する
Watanabe, Okitsugu 著作を一覧する
発行日: 2002年 6月
出版者: International Glaciological Society
誌名: Journal of Glaciology
巻: 48
号: 162
開始ページ: 452
終了ページ: 460
出版社 DOI: 10.3189/172756502781831304
抄録: Snowpack and ice-core samples were collected from the dome of Austfonna ice cap, Svalbard, in the spring of both 1998 and 1999. The samples were analyzed for anions, cations, pH, liquid electrical conductivity and oxygen isotopes. Concentrations of chemical components in snowpack with a history of melting were much lower than those in unmelted snowpack. There was a clear difference between Mg2+/Na+ ratios previously in melted snowpack (0.03 ± 0.02) and in unmelted snowpack (0.11 ± 0.02). We propose that the Mg2+/Na+ ratio can be used as an indicator of whether or not firn or bubbly ice in the Austfonna ice core has experienced melt percolation. The Mg2+/Na+ ratio indicates that firn or bubbly ice prior to AD 1920 was much less affected by melt percolation than firn or bubbly ice formed after 1920.
Rights: © 2002 International Glaciological Society
Relation (URI): http://www.igsoc.org/
資料タイプ: article
URI: http://hdl.handle.net/2115/39470
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 飯塚 芳徳

 

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