High-precision ice-flow velocities from ground observations on Dalk Glacier, Antarctica
High-precision ice-flow velocities from ground observations on Dalk Glacier, Antarctica
复制标题
南极洲达尔克冰川地面观测的高精度冰低速
DOI：
10.1016/j.polar.2018.09.003
复制
发表时间：
2019-03
期刊：
影响因子：
1.8
通讯作者：
e
中科院分区：
文献类型：
--
作者：
Ai Songtao;Wang Shansi;Li Yuansheng;Moholdt Geir;Zhou Chunxia;Liu Leibao;Yang Yu;e
达尔克冰川是中国南极中山站附近的一个冰解出口冰川，自2007年以来一直由南极研究所监测。利用2007年至2012年的原位观测方位数据，计算了67个高精度空间交点。因此，通过地面观测，对Dalk冰川舌部的冰流特征进行了研究。观测到的最大冰流速（IV）为192.72米/年，在桩P9。在横截面上，冰川两侧的流速随距中心流线的距离而减小。进一步分析表明：各桩的流速逐年增加;越靠近终点，冰流越快;主流区IV的上升比约为10.67 m/a2。我们还观察到的冰流速度的季节性变化，包括在2009年1月之前的冰崩解事件的速度。在标桩上测量的海拔变化显示，沿着中心流线有波动，这表明以前没有发现的海山上方有冰架搁浅。
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/a2in 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.
登录
查看更多内容
影响因子：
1.6
作者：
K. Kiernan;D. Gore;D. Fink;D. White;A. McConnell;I. A. Sigurdsson
通讯作者：
K. Kiernan;D. Gore;D. Fink;D. White;A. McConnell;I. A. Sigurdsson
DOI：
10.2307/1551118
发表时间：
1981-01
期刊：
Arctic and alpine research
影响因子：
--
作者：
R. Armstrong;W. Paterson
通讯作者：
R. Armstrong;W. Paterson
DOI：
10.3724/sp.j.1084.2012.00053
发表时间：
2013-01
期刊：
Chinese Journal of Polar Research
影响因子：
--
作者：
Songtao Ai;Zemin Wang;E. Dongchen;X. Pang;Chunxia Zhou;M. Yan;Weijun Sun;Haiyan Liu
通讯作者：
Songtao Ai;Zemin Wang;E. Dongchen;X. Pang;Chunxia Zhou;M. Yan;Weijun Sun;Haiyan Liu
影响因子：
4
作者：
K. Koch
通讯作者：
K. Koch
影响因子：
1.6
作者：
A. Wölfl;N. Wittenberg;P. Feldens;H. Hass;C. Betzler;G. Kuhn
通讯作者：
A. Wölfl;N. Wittenberg;P. Feldens;H. Hass;C. Betzler;G. Kuhn