| Item type |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2007-06-19 |
| タイトル |
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|
タイトル |
Sticking deep ice core drills: Why and how to recover |
|
言語 |
en |
| 言語 |
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|
言語 |
eng |
| 資源タイプ |
|
|
資源 |
http://purl.org/coar/resource_type/c_6501 |
|
タイプ |
journal article |
| アクセス権 |
|
|
アクセス権 |
open access |
|
アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 著者 |
Gundestrup, Niels S.
Johnsen, Sigfus J.
Hansen, Steffen B.
Shoji, Hitoshi
Talalay, Pavel
Wilhelms, Frank
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| 著者別名 |
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識別子Scheme |
WEKO |
|
|
識別子 |
36717 |
|
|
姓名 |
庄子, 仁 |
|
|
言語 |
ja |
| 抄録 |
|
|
内容記述タイプ |
Abstract |
|
内容記述 |
The GISP deep drill became stuck in 1981, but was free the following year. The NGRIP/EPICA deep drill has suffered from two big setbacks : The drill is stuck both at NGRIP in Greenland and at Dome C in Antarctica. Both events occurred in a period with routine drilling and high productivity. The reasons for the two events are believed to be different, but the chosen bore-hole liquid seems to be problematic. The densifier can adhere to the surface of the ice cuttings, making fine ice cuttings to sink in the liquid, in spite of a liquid density of 935kg/m^3. In spite of changed procedures and modified constructions, the drill became stuck again at NGRIP. It was freed using glycol, making use of both the temperature and temperature gradient in the hole. |
| 書誌情報 |
Memoirs of National Institute of Polar Research, Special Issue
巻 56,
p. 181-195,
発行日 2002-03
|
| 権利 |
|
|
権利情報 |
NATIONAL INSTITUTE OF POLAR RESEARCH, N.S.Gundestrup, S.J.Johnsen, S.B.Hansen, H.Shoji, P.Talalay, F.Wilhelms, Memoirs of National Institute of Polar Research. Special issue, 56, 2002, 181-195 |
| フォーマット |
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内容記述タイプ |
Other |
|
内容記述 |
application/pdf |
| 出版者 |
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|
出版者 |
国立極地研究所 |
|
言語 |
ja |
| 著者版フラグ |
|
|
言語 |
en |
|
値 |
publisher |
| 出版タイプ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
4436.pdf (6.1 MB)
