Recent and past processes at the ice-sheet base of Jutulstraumen drainage basin (Antarctica)
Future sea-level predictions require that the history and physical state of the Antarctic ice sheet is well understood and constrained by observations. Much of the ice sheets’ ice-dynamic properties are governed by processes at the ice-bed interface which can be imaged with radar sounding surveys. M...
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ftawi:oai:epic.awi.de:56047 2024-09-15T17:47:04+00:00 Recent and past processes at the ice-sheet base of Jutulstraumen drainage basin (Antarctica) Franke, Steven Neckel, Niklas Eisermann, Hannes Helm, Veit Steinhage, Daniel Asseng, Jölund Miller, Heinrich Jokat, Wilfried Eagles, Graeme Drews, Reinhard Eisen, Olaf Jansen, Daniela 2022-05-02 application/pdf https://epic.awi.de/id/eprint/56047/ https://epic.awi.de/id/eprint/56047/1/DGP_Polartatung_2022_neu.pdf https://hdl.handle.net/10013/epic.681940d9-51c2-43b1-b859-0203870dad69 unknown https://epic.awi.de/id/eprint/56047/1/DGP_Polartatung_2022_neu.pdf Franke, S. orcid:0000-0001-8462-4379 , Neckel, N. orcid:0000-0003-4300-5488 , Eisermann, H. orcid:0000-0002-5604-6484 , Helm, V. orcid:0000-0001-7788-9328 , Steinhage, D. orcid:0000-0003-4737-9751 , Asseng, J. , Miller, H. , Jokat, W. orcid:0000-0002-7793-5854 , Eagles, G. orcid:0000-0001-5325-0810 , Drews, R. , Eisen, O. orcid:0000-0002-6380-962X and Jansen, D. orcid:0000-0002-4412-5820 (2022) Recent and past processes at the ice-sheet base of Jutulstraumen drainage basin (Antarctica) , 28. Internationale Polartagung, Potsdam, Germany, 1 May 2022 - 5 May 2022 . hdl:10013/epic.681940d9-51c2-43b1-b859-0203870dad69 EPIC328. Internationale Polartagung, Potsdam, Germany, 2022-05-01-2022-05-05 Conference notRev 2022 ftawi 2024-06-24T04:28:46Z Future sea-level predictions require that the history and physical state of the Antarctic ice sheet is well understood and constrained by observations. Much of the ice sheets’ ice-dynamic properties are governed by processes at the ice-bed interface which can be imaged with radar sounding surveys. Moreover, certain processes at the ice-sheet base can have an effect all the way to the ice surface, which in turn can be observed with satellites. Here we use a combination of ultra-wideband radio-echo sounding data, satellite radar and laser altimetry data to characterize the evolution of the subglacial morphology of the Jutulstraumen drainage basin (western Dronning Maud Land, Antarctica). Based on the classification of the bed topography, we reconstruct the step-by-step modifications the subglacial landscape has experienced since the beginning of the glaciation of Antarctica, 34 million years ago. In addition, between 2017 and 2020, we find evidence of active episodic cascade-like subglacial water transport along the subglacial valley network. The combination of these observations will represent an important step towards a better understanding of large-scale ice-sheet dynamics in western Dronning Maud Land. Conference Object Antarc* Antarctic Antarctica Dronning Maud Land Ice Sheet Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
Future sea-level predictions require that the history and physical state of the Antarctic ice sheet is well understood and constrained by observations. Much of the ice sheets’ ice-dynamic properties are governed by processes at the ice-bed interface which can be imaged with radar sounding surveys. Moreover, certain processes at the ice-sheet base can have an effect all the way to the ice surface, which in turn can be observed with satellites. Here we use a combination of ultra-wideband radio-echo sounding data, satellite radar and laser altimetry data to characterize the evolution of the subglacial morphology of the Jutulstraumen drainage basin (western Dronning Maud Land, Antarctica). Based on the classification of the bed topography, we reconstruct the step-by-step modifications the subglacial landscape has experienced since the beginning of the glaciation of Antarctica, 34 million years ago. In addition, between 2017 and 2020, we find evidence of active episodic cascade-like subglacial water transport along the subglacial valley network. The combination of these observations will represent an important step towards a better understanding of large-scale ice-sheet dynamics in western Dronning Maud Land. |
format |
Conference Object |
author |
Franke, Steven Neckel, Niklas Eisermann, Hannes Helm, Veit Steinhage, Daniel Asseng, Jölund Miller, Heinrich Jokat, Wilfried Eagles, Graeme Drews, Reinhard Eisen, Olaf Jansen, Daniela |
spellingShingle |
Franke, Steven Neckel, Niklas Eisermann, Hannes Helm, Veit Steinhage, Daniel Asseng, Jölund Miller, Heinrich Jokat, Wilfried Eagles, Graeme Drews, Reinhard Eisen, Olaf Jansen, Daniela Recent and past processes at the ice-sheet base of Jutulstraumen drainage basin (Antarctica) |
author_facet |
Franke, Steven Neckel, Niklas Eisermann, Hannes Helm, Veit Steinhage, Daniel Asseng, Jölund Miller, Heinrich Jokat, Wilfried Eagles, Graeme Drews, Reinhard Eisen, Olaf Jansen, Daniela |
author_sort |
Franke, Steven |
title |
Recent and past processes at the ice-sheet base of Jutulstraumen drainage basin (Antarctica) |
title_short |
Recent and past processes at the ice-sheet base of Jutulstraumen drainage basin (Antarctica) |
title_full |
Recent and past processes at the ice-sheet base of Jutulstraumen drainage basin (Antarctica) |
title_fullStr |
Recent and past processes at the ice-sheet base of Jutulstraumen drainage basin (Antarctica) |
title_full_unstemmed |
Recent and past processes at the ice-sheet base of Jutulstraumen drainage basin (Antarctica) |
title_sort |
recent and past processes at the ice-sheet base of jutulstraumen drainage basin (antarctica) |
publishDate |
2022 |
url |
https://epic.awi.de/id/eprint/56047/ https://epic.awi.de/id/eprint/56047/1/DGP_Polartatung_2022_neu.pdf https://hdl.handle.net/10013/epic.681940d9-51c2-43b1-b859-0203870dad69 |
genre |
Antarc* Antarctic Antarctica Dronning Maud Land Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica Dronning Maud Land Ice Sheet |
op_source |
EPIC328. Internationale Polartagung, Potsdam, Germany, 2022-05-01-2022-05-05 |
op_relation |
https://epic.awi.de/id/eprint/56047/1/DGP_Polartatung_2022_neu.pdf Franke, S. orcid:0000-0001-8462-4379 , Neckel, N. orcid:0000-0003-4300-5488 , Eisermann, H. orcid:0000-0002-5604-6484 , Helm, V. orcid:0000-0001-7788-9328 , Steinhage, D. orcid:0000-0003-4737-9751 , Asseng, J. , Miller, H. , Jokat, W. orcid:0000-0002-7793-5854 , Eagles, G. orcid:0000-0001-5325-0810 , Drews, R. , Eisen, O. orcid:0000-0002-6380-962X and Jansen, D. orcid:0000-0002-4412-5820 (2022) Recent and past processes at the ice-sheet base of Jutulstraumen drainage basin (Antarctica) , 28. Internationale Polartagung, Potsdam, Germany, 1 May 2022 - 5 May 2022 . hdl:10013/epic.681940d9-51c2-43b1-b859-0203870dad69 |
_version_ |
1810495612602286080 |