Item type |
学術雑誌論文 / Journal Article(1) |
公開日 |
2019-03-31 |
タイトル |
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タイトル |
High-precision ice-flow velocities from ground observations on Dalk Glacier, Antarctica |
タイトル |
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言語 |
en |
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タイトル |
High-precision ice-flow velocities from ground observations on Dalk Glacier, Antarctica |
言語 |
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言語 |
eng |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Bedrock rise |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Dalk glacier |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
East Antarctica |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Ice-flow velocity |
キーワード |
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言語 |
en |
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主題Scheme |
Other |
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主題 |
Surface fluctuation |
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 |
journal article |
アクセス権 |
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アクセス権 |
metadata only access |
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アクセス権URI |
http://purl.org/coar/access_right/c_14cb |
著者 |
Ai, Songtao
Wang, Shansi
Li, Yuansheng
Moholdt, Geir
Zhou, Chunxia
Liu, Leibao
Yang, Yuande
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抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
Dalk Glacier, which has been monitored by CHINARE since 2007, is a calving outlet glacier near the Chinese Zhongshan Station in East Antarctica. Using in situ observational azimuthal data from 2007 to 2012, 67 high-precision spatial intersection points were calculated. Consequently, the ice-flow features of the tongue of Dalk Glacier were explored via ground measurements. The maximum observed ice-flow velocity (IV) was 192.72 m/a, at stake P9. The velocities then decreased with the distance from the central flow line on both sides of the glacier in a cross section. Further analysis showed the following: the velocities of each stake increased annually; the closer to the terminus, the faster the ice flowed; and the ascent ratio of the IVs was approximately 10.67 m/a2 in the main flow area. We also observed seasonal variations in the ice-flow velocities, including a speed-up in January 2009 preceding an ice-calving event. The elevation change measurements at the stakes showed fluctuations along the central flow line, which indicates ice-shelf grounding over a seamount that had not been previously identified. |
書誌情報 |
en : Polar Science
巻 19,
p. 13-23,
発行日 2019-03
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ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
18739652 |
DOI |
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識別子タイプ |
DOI |
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関連識別子 |
https://doi.org/10.1016/j.polar.2018.09.003 |
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関連名称 |
10.1016/j.polar.2018.09.003 |