Estimation of ice fabric within Whillans Ice Stream using polarimetric phase-sensitive radar sounding

Estimation of ice fabric within Whillans Ice Stream using polarimetric phase-sensitive radar sounding
复制标题

使用偏振相敏雷达探测估计 Whillans 冰流内的冰结构

DOI:
10.1017/aog.2020.6
复制
发表时间:
2020
影响因子:
2.9
通讯作者:
Siegfried, Matthew R.
Siegfried, Matthew R.
中科院分区:
地球科学4区
文献类型:
--
作者:
Jordan, Thomas M.;Schroeder, Dustin M.;Elsworth, Cooper W.;Siegfried, Matthew R.

文献摘要

参考文献

被引文献

相似文献

在这里,我们使用来自自主相敏无线电回声探测仪(APRES)的偏振测量来研究西南极惠兰冰流中的冰结构。测量导线的一端以与美世冰流的缝合区为界,另一端以底部的“粘性点”为界。我们的数据分析使用了一种基于相位的极化相干方法来估计水平冰结构的属性:结构方向和水平结构不对称性的大小。我们推断,在近地表(z≈10-50m)和更深的冰(z≈170-360m)之间的主要水平c轴上存在方位旋转,近表面的方向更接近垂直于流动,而更深的冰更接近平行。在近地表,织物的不对称性向惠兰冰流中心方向增加,这与地表压缩方向一致。相反,较深冰层中的组构取向与表面压缩方向不一致,但与冰川对纵向压缩的反应与附近粘性点的底部阻力一致。
Here we use polarimetric measurements from an Autonomous phase-sensitive Radio-Echo Sounder (ApRES) to investigate ice fabric within Whillans Ice Stream, West Antarctica. The survey traverse is bounded at one end by the suture zone with the Mercer Ice Stream and at the other end by a basal ‘sticky spot’. Our data analysis employs a phase-based polarimetric coherence method to estimate horizontal ice fabric properties: the fabric orientation and the magnitude of the horizontal fabric asymmetry. We infer an azimuthal rotation in the prevailing horizontal c-axis between the near-surface (z ≈ 10–50 m) and deeper ice (z ≈ 170–360 m), with the near-surface orientated closer to perpendicular to flow and deeper ice closer to parallel. In the near-surface, the fabric asymmetry increases toward the center of Whillans Ice Stream which is consistent with the surface compression direction. By contrast, the fabric orientation in deeper ice is not aligned with the surface compression direction but is consistent with englacial ice reacting to longitudinal compression associated with basal resistance from the nearby sticky spot.
DOI: 10.3189/2012jog11j114
发表时间: 2012
影响因子: 3.4
作者:
R. Drews;O. Eisen;D. Steinhage;I. Weikusat;S. Kipfstuhl;F. Wilhelms
通讯作者: R. Drews;O. Eisen;D. Steinhage;I. Weikusat;S. Kipfstuhl;F. Wilhelms
南极洲西部冰流 B 的边缘剪应力
DOI: --
发表时间: 1997
影响因子: 3.4
作者:
M. Jackson;B. Kamb
通讯作者: B. Kamb
NEEM 站点周围的多通道和多极化雷达测量
DOI: 10.5194/tc-12-2689-2018
发表时间: 2018
期刊: The Cryosphere
影响因子: --
作者:
Jilu Li;Jose A. Vélez González;C. Leuschen;A. Harish;P. Gogineni;M. Montagnat;I. Weikusat;F. Rodríguez‐Morales;J. Paden
通讯作者: J. Paden
DOI: 10.3189/172756506781828548
发表时间: 2006-01-01
影响因子: 3.4
作者:
Fujita, Shuji;Maeno, Hideo;Matsuoka, Kenichi
通讯作者: Matsuoka, Kenichi
测量冰中晶体取向结构的声波方法以及西南极冰盖 (WAIS) 分水岭的结果
DOI: --
发表时间: 2017
影响因子: 3.4
作者:
D. Kluskiewicz;E. Waddington;S. Anandakrishnan;D. Voigt;K. Matsuoka;M. McCarthy
通讯作者: M. McCarthy