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A "HYDRO-THERMAL" INSTABILITY THEORY OF GLACIER SURGES
https://doi.org/10.15094/00003760
https://doi.org/10.15094/00003760ad158183-9a0c-4b89-b086-fbb6b6c494b8
名前 / ファイル | ライセンス | アクション |
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KJ00000767914 (55.0 kB)
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Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 1992-12-01 | |||||
タイトル | ||||||
タイトル | A "HYDRO-THERMAL" INSTABILITY THEORY OF GLACIER SURGES | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
ID登録 | ||||||
ID登録 | 10.15094/00003760 | |||||
ID登録タイプ | JaLC | |||||
ページ属性 | ||||||
内容記述タイプ | Other | |||||
内容記述 | P(論文) | |||||
記事種別(英) | ||||||
en | ||||||
ABSTRACT | ||||||
論文名よみ | ||||||
その他のタイトル | A "HYDRO-THERMAL" INSTABILITY THEORY OF GLACIER SURGES | |||||
著者名よみ |
オザワ, ヒサシ
× オザワ, ヒサシ× ワカハマ, ゴロウ |
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著者名(英) |
OZAWA, Hisashi
× OZAWA, Hisashi× WAKAHAMA, Gorow |
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著者所属(英) | ||||||
en | ||||||
Institute of Low Temperature Science, Hokkaido University | ||||||
著者所属(英) | ||||||
en | ||||||
Institute of Low Temperature Science, Hokkaido University | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Glacier surge is a catastrophic glacier advance which can't be explained by variation in climate. We propose a "hydro-thermal instability" model which is capable of explaining surges of an inversion type glacier. An inversion type glacier has a cold ice zone in its lower part which is mainly frozen to the bed rock and a temperate snow zone in its higher part into which meltwater percolates in summer. This glacier is in a potentially unstable condition, since the movement of ice and water is dammed by the lower cold ice bank. If this bank is fractured by thrust faults, dammed water drains through the faults and warms the bank temperature to the melting point. Then a catastrophic advance (the surge) will occur. Here we determined the climate condition in which such an inversion type glacier can exist, i.e., the freezing index during winter is more than 2000 (℃ day) and annual precipitation exceeds 700 (mm water) at the snow line of a glacier. Many surging glaciers fit the climatic condition for the inversion type. The ice sheets of Greenland and Laurentide are estimated to be in similar unstable condition. Their surges would cause rapid sea level rise and may stop deep water production in the North Atlantic Ocean. | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA10756213 | |||||
書誌情報 |
Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology 巻 6, p. 157, 発行日 1992-12 |
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出版者 | ||||||
出版者 | National Institute of Polar Research |