Articles | Volume 11, issue 3
https://doi.org/10.5194/tc-11-1247-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/tc-11-1247-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
24 May 2017
Research article |
| 24 May 2017
Self-affine subglacial roughness: consequences for radar scattering and basal water discrimination in northern Greenland
Bristol Glaciology Centre, School of Geographical Sciences, University of Bristol, Bristol, UK
Michael A. Cooper
Bristol Glaciology Centre, School of Geographical Sciences, University of Bristol, Bristol, UK
Dustin M. Schroeder
Department of Geophysics, Stanford University, Stanford, California, USA
Christopher N. Williams
Bristol Glaciology Centre, School of Geographical Sciences, University of Bristol, Bristol, UK
John D. Paden
Center for Remote Sensing of Ice Sheets, University of Kansas, Lawrence, Kansas, USA
Martin J. Siegert
Grantham Institute and Department of Earth Science and Engineering, Imperial College, London, UK
Jonathan L. Bamber
Bristol Glaciology Centre, School of Geographical Sciences, University of Bristol, Bristol, UK
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- Quantifying bed roughness beneath contemporary and palaeo-ice streams F. FALCINI et al. 10.1017/jog.2018.71
- Topographic Correction of Geothermal Heat Flux in Greenland and Antarctica W. Colgan et al. 10.1029/2020JF005598
- Radiofrequency ice dielectric measurements at Summit Station, Greenland J. Aguilar et al. 10.1017/jog.2023.72
- Fractal Properties of Greenland Isolines S. Rezvanbehbahani et al. 10.1007/s11004-019-09788-7
- Investigating the Radar Response of Englacial Debris Entrained Basal Ice Units in East Antarctica Using Electromagnetic Forward Modeling S. Franke et al. 10.1109/TGRS.2023.3277874
- Revealing the former bed of Thwaites Glacier using sea-floor bathymetry: implications for warm-water routing and bed controls on ice flow and buttressing K. Hogan et al. 10.5194/tc-14-2883-2020
- Antarctic Topographic Realizations and Geostatistical Modeling Used to Map Subglacial Lakes E. MacKie et al. 10.1029/2019JF005420
- Subglacial roughness of the Greenland Ice Sheet: relationship with contemporary ice velocity and geology M. Cooper et al. 10.5194/tc-13-3093-2019
- Geophysical constraints on the properties of a subglacial lake in northwest Greenland R. Maguire et al. 10.5194/tc-15-3279-2021
- Surface Expression of Basal and Englacial Features, Properties, and Processes of the Greenland Ice Sheet M. Cooper et al. 10.1029/2018GL080620
- Hard rock landforms generate 130 km ice shelf channels through water focusing in basal corrugations H. Jeofry et al. 10.1038/s41467-018-06679-z
- Geospatial simulations of airborne ice-penetrating radar surveying reveal elevation under-measurement bias for ice-sheet bed topography O. Bartlett et al. 10.1017/aog.2020.35
- Ocean access beneath the southwest tributary of Pine Island Glacier, West Antarctica D. Schroeder et al. 10.1017/aog.2017.45
- Ambiguous stability of glaciers at bed peaks A. Robel et al. 10.1017/jog.2022.31
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- Complex Basal Conditions and Their Influence on Ice Flow at the Onset of the Northeast Greenland Ice Stream S. Franke et al. 10.1029/2020JF005689
- Mapping the vertical heterogeneity of Greenland's firn from 2011–2019 using airborne radar and laser altimetry A. Rutishauser et al. 10.5194/tc-18-2455-2024
- Geometric Power Fall-Off in Radar Sounding M. Haynes et al. 10.1109/TGRS.2018.2840511
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- Geothermal Heat Flux Reveals the Iceland Hotspot Track Underneath Greenland Y. Martos et al. 10.1029/2018GL078289
- Radar for Europa Assessment and Sounding: Ocean to Near-Surface (REASON) D. Blankenship et al. 10.1007/s11214-024-01072-3
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- Five decades of radioglaciology D. Schroeder et al. 10.1017/aog.2020.11
- A constraint upon the basal water distribution and thermal state of the Greenland Ice Sheet from radar bed echoes T. Jordan et al. 10.5194/tc-12-2831-2018
- Characteristics of dynamic thickness change across diverse outlet glacier geometries and basal conditions D. Yang et al. 10.1017/jog.2024.50
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- Radar sounding survey over Devon Ice Cap indicates the potential for a diverse hypersaline subglacial hydrological environment A. Rutishauser et al. 10.5194/tc-16-379-2022
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- Understanding of Contemporary Regional Sea‐Level Change and the Implications for the Future B. Hamlington et al. 10.1029/2019RG000672
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1 citations as recorded by crossref.
Latest update: 17 Nov 2024
Short summary
Using radio-echo sounding data from northern Greenland, we demonstrate that subglacial roughness exhibits self-affine (fractal) scaling behaviour. This enables us to assess topographic control upon the bed-echo waveform, and explain the spatial distribution of the degree of scattering (specular and diffuse reflections). Via comparison with a prediction for the basal thermal state (thawed and frozen regions of the bed) we discuss the consequences of our study for basal water discrimination.
Using radio-echo sounding data from northern Greenland, we demonstrate that subglacial roughness...
