Modeled freeze-on rates at Jutulstraumen Glacier onset (East Antarctica)
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| Format: | Dataset Open Access |
| Sprache: | en |
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2024
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| _version_ | 1867169157936578560 |
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| author | Wolovick, Michael Franke, Steven |
| author_facet | Wolovick, Michael Franke, Steven |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Understanding the material properties and physical conditions of basal ice is crucial for a comprehensive understanding of Antarctic ice-sheet dynamics. Yet, direct data are sparse and difficult to acquire, necessitating geophysical data for analysis. Here, we employed high-resolution ultra-wideband radar to map high-backscatter zones near the glacier bed within East Antarctica's Jutulstraumen drainage basin. Our results revealed that the basal ice in an area of ~ 10,000 square kilometers is composed of along-flow oriented sediment-laden basal ice units connected to the basal substrate, extending up to several hundred meters of thickness. Three-dimensional thermomechanical modeling suggests these units formed via basal freeze-on of subglacial water originating further upstream. Our findings suggest that basal freeze-on, and the entrainment and transport of subglacial material play a significant role for an accurate representation of material, physical, and rheological properties of the Antarctic ice sheet's basal ice, ultimately enhancing the accuracy and reliability of ice-sheet modeling. Here, we publish the outputs of our three-dimensional thermomechanical modeling. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_963891 |
| institution | PANGAEA |
| language | en |
| publishDate | 2024 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Modeled freeze-on rates at Jutulstraumen Glacier onset (East Antarctica) Wolovick, Michael Franke, Steven 3D Thermomechanical modeling; Antarctica; basal freeze-on; basal ice; File content; Image; Jutulstraumen; JutulstraumenGlacier_model; Model; netCDF file; Subglacial sediments Understanding the material properties and physical conditions of basal ice is crucial for a comprehensive understanding of Antarctic ice-sheet dynamics. Yet, direct data are sparse and difficult to acquire, necessitating geophysical data for analysis. Here, we employed high-resolution ultra-wideband radar to map high-backscatter zones near the glacier bed within East Antarctica's Jutulstraumen drainage basin. Our results revealed that the basal ice in an area of ~ 10,000 square kilometers is composed of along-flow oriented sediment-laden basal ice units connected to the basal substrate, extending up to several hundred meters of thickness. Three-dimensional thermomechanical modeling suggests these units formed via basal freeze-on of subglacial water originating further upstream. Our findings suggest that basal freeze-on, and the entrainment and transport of subglacial material play a significant role for an accurate representation of material, physical, and rheological properties of the Antarctic ice sheet's basal ice, ultimately enhancing the accuracy and reliability of ice-sheet modeling. Here, we publish the outputs of our three-dimensional thermomechanical modeling. |
| title | Modeled freeze-on rates at Jutulstraumen Glacier onset (East Antarctica) |
| topic | 3D Thermomechanical modeling; Antarctica; basal freeze-on; basal ice; File content; Image; Jutulstraumen; JutulstraumenGlacier_model; Model; netCDF file; Subglacial sediments |
| url | https://doi.org/10.1594/PANGAEA.963891 |