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
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发表时间:
2020
影响因子:
2.9
通讯作者:
Siegfried, Matthew R.
中科院分区:
文献类型:
--
作者:
Jordan, Thomas M.;Schroeder, Dustin M.;Elsworth, Cooper W.;Siegfried, Matthew R.
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.
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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
影响因子:
3.4
作者:
M. Jackson;B. Kamb
通讯作者:
B. Kamb
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
影响因子:
3.4
作者:
Fujita, Shuji;Maeno, Hideo;Matsuoka, Kenichi
通讯作者:
Matsuoka, Kenichi
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