Franke, Steven; Wolovick, Michael (2024): Locations and thickness of sediment-laden basal ice zones at Jutulstraumen Glacier onset (East Antarctica) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.963889
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Abstract:
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 locations and thickness of high-backscatter zones at the onset of the Jutulstraumen glacier in East Antarctica.
Keyword(s):
Supplement to:
Franke, Steven; Wolovick, Michael; Drews, Reinhard; Jansen, Daniela; Matsuoka, Kenichi; Bons, Paul D (2024): Sediment freeze‐on and transport near the onset of a fast‐flowing glacier in East Antarctica. Geophysical Research Letters, 51, e2023GL107164, https://doi.org/10.1029/2023GL107164
Related to:
Franke, Steven; Gerber, Tamara Annina; Warren, Craig; Jansen, Daniela; Eisen, Olaf; Dahl-Jensen, Dorthe (2023): Investigating the Radar Response of Englacial Debris Entrained Basal Ice Units in East Antarctica Using Electromagnetic Forward Modeling. IEEE Transactions on Geoscience and Remote Sensing, 61, 1-16, https://doi.org/10.1109/TGRS.2023.3277874
Wolovick, Michael; Franke, Steven (2024): Modeled freeze-on rates at Jutulstraumen Glacier onset (East Antarctica) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.963891
Funding:
German Research Foundation (DFG), grant/award no. 506043073: DANGER DML - Deciphering the evolution of an East Antarctic drainage system over the last glacial cycle in western Dronning Maud Land
Coverage:
Median Latitude: -73.526517 * Median Longitude: 2.610217 * South-bound Latitude: -74.077644 * West-bound Longitude: 1.000395 * North-bound Latitude: -73.019966 * East-bound Longitude: 3.824296
Date/Time Start: 2018-12-22T09:12:50 * Date/Time End: 2018-12-30T12:45:21
Event(s):
DML_20197001_002 (20197001_002) * Latitude Start: -73.800270 * Longitude Start: 1.409979 * Latitude End: -73.852081 * Longitude End: 1.097192 * Location: Antarctica * Campaign: P6-215_UWB_2018 (JuRaS, CHIRP) * Basis: POLAR 6 * Method/Device: Radio-echo sounding (RES)
DML_20197002_003 (20197002_003) * Latitude Start: -73.164841 * Longitude Start: 3.824296 * Latitude End: -73.863739 * Longitude End: 3.687171 * Location: Antarctica * Campaign: P6-215_UWB_2018 (JuRaS, CHIRP) * Basis: POLAR 6 * Method/Device: Radio-echo sounding (RES)
DML_20197002_005 (20197002_005) * Latitude Start: -73.929291 * Longitude Start: 3.192972 * Latitude End: -73.105316 * Longitude End: 3.372065 * Location: Antarctica * Campaign: P6-215_UWB_2018 (JuRaS, CHIRP) * Basis: POLAR 6 * Method/Device: Radio-echo sounding (RES)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Franke, Steven | |||
| 2 | Season | Season | Franke, Steven | |||
| 3 | Profile ID | Profile ID | Franke, Steven | |||
| 4 | Trace Number | Trace | Franke, Steven | |||
| 5 | LONGITUDE | Longitude | Franke, Steven | Geocode | ||
| 6 | LATITUDE | Latitude | Franke, Steven | Geocode | ||
| 7 | High backscatter zone, thickness | HBZ thickn | m | Franke, Steven | Radio-echo sounding (RES) |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
101008 data points
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