Item type |
紀要論文(ELS) / Departmental Bulletin Paper(1) |
公開日 |
2001-11-01 |
タイトル |
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タイトル |
The reduction of chloride ion concentration in basal ice near Hamna Icefall, East Antarctica |
言語 |
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言語 |
eng |
資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
departmental bulletin paper |
ID登録 |
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ID登録 |
10.15094/00002934 |
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ID登録タイプ |
JaLC |
ページ属性 |
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内容記述タイプ |
Other |
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内容記述 |
P(論文) |
記事種別(英) |
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en |
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Scientific Note |
論文名よみ |
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その他のタイトル |
The reduction of chloride ion concentration in basal ice near Hamna Icefall, East Antarctica |
著者名よみ |
イイズカ, ヨシノリ
サタケ, ヒロシ
ワタナベ, オキツグ
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著者名(英) |
Iizuka, Yoshinori
Satake, Hiroshi
Watanabe, Okitsugu
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著者所属(英) |
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en |
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National Institute of Polar Research |
著者所属(英) |
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en |
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Department of Environmental Chemistry and Biology, Toyama University |
著者所属(英) |
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en |
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National Institute of Polar Research |
抄録(英) |
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内容記述タイプ |
Other |
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内容記述 |
The present paper mainly discusses chloride ions (Cl^-) in debris-laden basal ice near Hamna Icefall, Queen Maud Land, East Antarctica. The basal ice consists of alternating layers of bubble-free and bubbly ice of the order of mm to cm in thickness. Detailed analyses of Cl^- and stable isotopes (δ^<18>O and δD) on the alternating layers were performed. The Cl^- concentrations in the bubble-free ice layers and in the bubbly ice layers whose isotopic fluctuations decrease from neighboring bubble-free ice layers are reduced compared to those in the bubbly ice layers having quasi-neutral values on the isotopic profile. The reduction of Cl concentration in frozen ice compared to that in pre-freezing water was also observed from an experiment on ion fractionation by freezing. These results suggest that the bubble-free ice layers and the bubbly ice layers whose isotopic fluctuation is decreased from that in neighboring bubble-free ice layers were formed by melt-refreezing processes. The reduction of Cl concentration in the basal ice is considered to be an indicator to distinguish whether the basal ice has experienced melt-refreezing or not. |
雑誌書誌ID |
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収録物識別子タイプ |
NCID |
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収録物識別子 |
AA1129795X |
書誌情報 |
Polar meteorology and glaciology
巻 15,
p. 107-113,
発行日 2001-11
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出版者 |
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出版者 |
National Institute of Polar Research |