The EGU interactive community platform
The EGU interactive community platform
EGUsphere
Preprints
Preprints
https://doi.org/10.5194/egusphere-2024-2519
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/egusphere-2024-2519
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.
Preprints
09 Sep 2024
 | 09 Sep 2024
Status: this preprint is open for discussion.

Brief communication: Reduced bandwidth improves the depth limit of the radar coherence method for detecting ice crystal fabric asymmetry

Ole Zeising, Álvaro Arenas-Pingarrón, Alex M. Brisbourne, and Carlos Martín

Abstract. Ice crystal orientation fabric strongly affects the viscous deformation of glacier ice. A popular technique to investigate ice fabric is radar polarimetry, often analysed using the coherence method. However, in fast-flowing areas with strong anisotropy, this method provides information of shallow areas below the surface only. This study proposes reducing radar bandwidth to enhance the depth limit for fabric asymmetry detection. Using data from two ice streams, we demonstrate that reduced bandwidth significantly increases the depth limit, depending on the centre frequency. This approach aims to improve the understanding of the spatial distribution of fabric, crucial for ice dynamics in fast-flowing regions.

How to cite. Zeising, O., Arenas-Pingarrón, Á., Brisbourne, A. M., and Martín, C.: Brief communication: Reduced bandwidth improves the depth limit of the radar coherence method for detecting ice crystal fabric asymmetry, EGUsphere [preprint], https://doi.org/10.5194/egusphere-2024-2519, 2024.
Received: 09 Aug 2024 – Discussion started: 09 Sep 2024
Publisher's note: Copernicus Publications remains neutral with regard to jurisdictional claims made in the text, published maps, institutional affiliations, or any other geographical representation in this preprint. The responsibility to include appropriate place names lies with the authors.
Ole Zeising, Álvaro Arenas-Pingarrón, Alex M. Brisbourne, and Carlos Martín

Status: open (until 07 Nov 2024)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
Post a comment Subscribe to comment alert
Ole Zeising, Álvaro Arenas-Pingarrón, Alex M. Brisbourne, and Carlos Martín

Data sets

Polarimetric phase-sensitive radar measurements at EastGRIP drill site, 2019 Ole Zeising and Angelika Humbert https://doi.org/10.1594/PANGAEA.951267

Crystal c-axes (fabric analyser G50) of ice core samples (vertical thin sections) collected from the polar ice core EGRIP, 111-1714 m depth Ilka Weikusat, Nicolas Stoll, Johanna Kerch, Jan Eichler, Daniela Jansen, and Sepp Kipfstuhl https://doi.org/10.1594/PANGAEA.949248

Radar characterization of ice crystal orientation fabric and anisotropic rheology within Rutford Ice Stream, 2017-2019 T. Jordan, C. Martín, A. Brisbourne, D. Schroeder, and A. Smith https://doi.org/10.5285/D5B7E5A1-B04D-48D8-A440-C010658EC146

Ole Zeising, Álvaro Arenas-Pingarrón, Alex M. Brisbourne, and Carlos Martín

Viewed

Total article views: 99 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
82 10 7 99 3 3
  • HTML: 82
  • PDF: 10
  • XML: 7
  • Total: 99
  • BibTeX: 3
  • EndNote: 3
Views and downloads (calculated since 09 Sep 2024)
Cumulative views and downloads (calculated since 09 Sep 2024)

Viewed (geographical distribution)

Total article views: 95 (including HTML, PDF, and XML) Thereof 95 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 05 Oct 2024
Download
Short summary
Ice crystal orientation influence how glacier ice deforms. Radar polarimetry is commonly used to study the bulk ice crystal orientation, but the often used coherence method only provides information of the shallow ice in fast-flowing areas. This study shows that reducing the bandwidth of high-bandwidth radar data significantly enhances the depth limit of the coherence method. This improvement helps us to better understand ice dynamics in fast-flowing ice streams.
Read more