Preserved landscapes underneath the Antarctic Ice Sheet reveal the geomorphological history of Jutulstraumen Basin
The landscape of Antarctica, hidden beneath kilometre‐thick ice in most places, has been shaped by the interactions between tectonic and erosional processes. The flow dynamics of the thick ice cover deepened pre‐formed topographic depressions by glacial erosion, but also preserved the subglacial lan...
Published in: | Earth Surface Processes and Landforms |
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Main Authors: | , , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2021
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Subjects: | |
Online Access: | https://doi.org/10.1002/esp.5203 http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/9751 |
id |
ftsubggeo:oai:e-docs.geo-leo.de:11858/9751 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
GEO-LEOe-docs (FID GEO) |
op_collection_id |
ftsubggeo |
language |
English |
topic |
basal roughness bed topography Dronning Maud Land East Antarctica erosion Jutulstraumen Glacier radio‐echo sounding subglacial morphology valley geometry |
spellingShingle |
basal roughness bed topography Dronning Maud Land East Antarctica erosion Jutulstraumen Glacier radio‐echo sounding subglacial morphology valley geometry Franke, Steven Eisermann, Hannes Jokat, Wilfried Eagles, Graeme Asseng, Jölund Miller, Heinrich Steinhage, Daniel Helm, Veit Eisen, Olaf Jansen, Daniela Eisermann, Hannes; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany Jokat, Wilfried; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany Eagles, Graeme; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany Asseng, Jölund; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany Miller, Heinrich; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany Steinhage, Daniel; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany Helm, Veit; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany Eisen, Olaf; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany Jansen, Daniela; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany Preserved landscapes underneath the Antarctic Ice Sheet reveal the geomorphological history of Jutulstraumen Basin |
topic_facet |
basal roughness bed topography Dronning Maud Land East Antarctica erosion Jutulstraumen Glacier radio‐echo sounding subglacial morphology valley geometry |
description |
The landscape of Antarctica, hidden beneath kilometre‐thick ice in most places, has been shaped by the interactions between tectonic and erosional processes. The flow dynamics of the thick ice cover deepened pre‐formed topographic depressions by glacial erosion, but also preserved the subglacial landscapes in regions with moderate to slow ice flow. Mapping the spatial variability of these structures provides the basis for reconstruction of the evolution of subglacial morphology. This study focuses on the Jutulstraumen Glacier drainage system in Dronning Maud Land, East Antarctica. The Jutulstraumen Glacier reaches the ocean via the Jutulstraumen Graben, which is the only significant passage for draining the East Antarctic Ice Sheet through the western part of the Dronning Maud Land mountain chain. We acquired new bed topography data during an airborne radar campaign in the region upstream of the Jutulstraumen Graben to characterise the source area of the glacier. The new data show a deep relief to be generally under‐represented in available bed topography compilations. Our analysis of the bed topography, valley characteristics and bed roughness leads to the conclusion that much more of the alpine landscape that would have formed prior to the Antarctic Ice Sheet is preserved than previously anticipated. We identify an active and deeply eroded U‐shaped valley network next to largely preserved passive fluvial and glacial modified landscapes. Based on the landscape classification, we reconstruct the temporal sequence by which ice flow modified the topography since the beginning of the glaciation of Antarctica. Airborne ice‐penetrating radar data reveal the evolution of the subglacial morphology of the Jutulstraumen Glacier drainage system in western Dronning Maud Land. We identify various geomorphological patterns that are related to different stages of subglacial erosion and allow us to reconstruct the temporal sequence by which ice flow modified the topography since the beginning of glaciation of Antarctica. |
format |
Article in Journal/Newspaper |
author |
Franke, Steven Eisermann, Hannes Jokat, Wilfried Eagles, Graeme Asseng, Jölund Miller, Heinrich Steinhage, Daniel Helm, Veit Eisen, Olaf Jansen, Daniela Eisermann, Hannes; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany Jokat, Wilfried; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany Eagles, Graeme; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany Asseng, Jölund; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany Miller, Heinrich; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany Steinhage, Daniel; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany Helm, Veit; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany Eisen, Olaf; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany Jansen, Daniela; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany |
author_facet |
Franke, Steven Eisermann, Hannes Jokat, Wilfried Eagles, Graeme Asseng, Jölund Miller, Heinrich Steinhage, Daniel Helm, Veit Eisen, Olaf Jansen, Daniela Eisermann, Hannes; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany Jokat, Wilfried; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany Eagles, Graeme; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany Asseng, Jölund; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany Miller, Heinrich; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany Steinhage, Daniel; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany Helm, Veit; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany Eisen, Olaf; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany Jansen, Daniela; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany |
author_sort |
Franke, Steven |
title |
Preserved landscapes underneath the Antarctic Ice Sheet reveal the geomorphological history of Jutulstraumen Basin |
title_short |
Preserved landscapes underneath the Antarctic Ice Sheet reveal the geomorphological history of Jutulstraumen Basin |
title_full |
Preserved landscapes underneath the Antarctic Ice Sheet reveal the geomorphological history of Jutulstraumen Basin |
title_fullStr |
Preserved landscapes underneath the Antarctic Ice Sheet reveal the geomorphological history of Jutulstraumen Basin |
title_full_unstemmed |
Preserved landscapes underneath the Antarctic Ice Sheet reveal the geomorphological history of Jutulstraumen Basin |
title_sort |
preserved landscapes underneath the antarctic ice sheet reveal the geomorphological history of jutulstraumen basin |
publishDate |
2021 |
url |
https://doi.org/10.1002/esp.5203 http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/9751 |
long_lat |
ENVELOPE(-1.000,-1.000,-72.000,-72.000) ENVELOPE(-0.500,-0.500,-71.583,-71.583) |
geographic |
Antarctic The Antarctic East Antarctica Dronning Maud Land East Antarctic Ice Sheet Jutulstraumen Jutulstraumen Glacier |
geographic_facet |
Antarctic The Antarctic East Antarctica Dronning Maud Land East Antarctic Ice Sheet Jutulstraumen Jutulstraumen Glacier |
genre |
Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet Jutulstraumen Glacier |
genre_facet |
Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet Jutulstraumen Glacier |
op_relation |
doi:10.1002/esp.5203 http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/9751 |
op_rights |
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1002/esp.5203 |
container_title |
Earth Surface Processes and Landforms |
container_volume |
46 |
container_issue |
13 |
container_start_page |
2728 |
op_container_end_page |
2745 |
_version_ |
1766168937039396864 |
spelling |
ftsubggeo:oai:e-docs.geo-leo.de:11858/9751 2023-05-15T13:42:31+02:00 Preserved landscapes underneath the Antarctic Ice Sheet reveal the geomorphological history of Jutulstraumen Basin Franke, Steven Eisermann, Hannes Jokat, Wilfried Eagles, Graeme Asseng, Jölund Miller, Heinrich Steinhage, Daniel Helm, Veit Eisen, Olaf Jansen, Daniela Eisermann, Hannes; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany Jokat, Wilfried; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany Eagles, Graeme; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany Asseng, Jölund; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany Miller, Heinrich; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany Steinhage, Daniel; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany Helm, Veit; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany Eisen, Olaf; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany Jansen, Daniela; 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Germany 2021-08-28 https://doi.org/10.1002/esp.5203 http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/9751 eng eng doi:10.1002/esp.5203 http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/9751 This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. CC-BY basal roughness bed topography Dronning Maud Land East Antarctica erosion Jutulstraumen Glacier radio‐echo sounding subglacial morphology valley geometry doc-type:article 2021 ftsubggeo https://doi.org/10.1002/esp.5203 2022-11-09T06:51:42Z The landscape of Antarctica, hidden beneath kilometre‐thick ice in most places, has been shaped by the interactions between tectonic and erosional processes. The flow dynamics of the thick ice cover deepened pre‐formed topographic depressions by glacial erosion, but also preserved the subglacial landscapes in regions with moderate to slow ice flow. Mapping the spatial variability of these structures provides the basis for reconstruction of the evolution of subglacial morphology. This study focuses on the Jutulstraumen Glacier drainage system in Dronning Maud Land, East Antarctica. The Jutulstraumen Glacier reaches the ocean via the Jutulstraumen Graben, which is the only significant passage for draining the East Antarctic Ice Sheet through the western part of the Dronning Maud Land mountain chain. We acquired new bed topography data during an airborne radar campaign in the region upstream of the Jutulstraumen Graben to characterise the source area of the glacier. The new data show a deep relief to be generally under‐represented in available bed topography compilations. Our analysis of the bed topography, valley characteristics and bed roughness leads to the conclusion that much more of the alpine landscape that would have formed prior to the Antarctic Ice Sheet is preserved than previously anticipated. We identify an active and deeply eroded U‐shaped valley network next to largely preserved passive fluvial and glacial modified landscapes. Based on the landscape classification, we reconstruct the temporal sequence by which ice flow modified the topography since the beginning of the glaciation of Antarctica. Airborne ice‐penetrating radar data reveal the evolution of the subglacial morphology of the Jutulstraumen Glacier drainage system in western Dronning Maud Land. We identify various geomorphological patterns that are related to different stages of subglacial erosion and allow us to reconstruct the temporal sequence by which ice flow modified the topography since the beginning of glaciation of Antarctica. Article in Journal/Newspaper Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet Jutulstraumen Glacier GEO-LEOe-docs (FID GEO) Antarctic The Antarctic East Antarctica Dronning Maud Land East Antarctic Ice Sheet Jutulstraumen ENVELOPE(-1.000,-1.000,-72.000,-72.000) Jutulstraumen Glacier ENVELOPE(-0.500,-0.500,-71.583,-71.583) Earth Surface Processes and Landforms 46 13 2728 2745 |