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High-precision ice-flow velocities from ground observations on Dalk Glacier, Antarctica
https://nipr.repo.nii.ac.jp/records/15597
https://nipr.repo.nii.ac.jp/records/15597eff7c372-e0d0-44ad-b555-2cddc1031a03
Item type | 学術雑誌論文 / Journal Article(1) | |||||
---|---|---|---|---|---|---|
公開日 | 2019-03-31 | |||||
タイトル | ||||||
タイトル | High-precision ice-flow velocities from ground observations on Dalk Glacier, Antarctica | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | High-precision ice-flow velocities from ground observations on Dalk Glacier, Antarctica | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Bedrock rise | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Dalk glacier | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | East Antarctica | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Ice-flow velocity | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Surface fluctuation | |||||
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 | journal article | |||||
アクセス権 | ||||||
アクセス権 | metadata only access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
著者 |
Ai, Songtao
× Ai, Songtao× Wang, Shansi× Li, Yuansheng× Moholdt, Geir× Zhou, Chunxia× Liu, Leibao× Yang, Yuande |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
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 | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 18739652 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1016/j.polar.2018.09.003 | |||||
関連名称 | 10.1016/j.polar.2018.09.003 |