Study of the structural and dynamic changes of a surging glacier using seismic observations ...
<!--!introduction!--> Glacier flow instabilities are mainly caused by changes at the ice-bed interface, where basal slip and sediment deformation drive basal glacier movement. Understanding basal processes and their response to external forcing remains difficult due to limited access to the gl...
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GFZ German Research Centre for Geosciences
2023
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ftdatacite:10.57757/iugg23-1567 2023-07-23T04:19:24+02:00 Study of the structural and dynamic changes of a surging glacier using seismic observations ... Nanni, Ugo Thomas, Pauze Lucien, Goulet Andreas, Kohler Coline, Bouchayer Thomas, Schuler 2023 https://dx.doi.org/10.57757/iugg23-1567 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018039 unknown GFZ German Research Centre for Geosciences Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 Article ConferencePaper Oral 2023 ftdatacite https://doi.org/10.57757/iugg23-1567 2023-07-03T16:18:40Z <!--!introduction!--> Glacier flow instabilities are mainly caused by changes at the ice-bed interface, where basal slip and sediment deformation drive basal glacier movement. Understanding basal processes and their response to external forcing remains difficult due to limited access to the glacier bed. In this study, we examine variations in subsurface and subglacial mechanical conditions of Kongsvegen glacier (Svalbard). This glacier shows strong indications of an imminent new rapid flow event. To investigate the potential causes of such an acceleration, we combine conventional measurements such as surface velocity (20 GNSS along the flow line) and basal water pressure (two boreholes) with seismic measurements (14 seismometers along the flow line and 6 seismometers in boreholes) and a unique measurement of basal drag applied to the sediments. We use our seismic measurements to study (1) subglacial hydrological conditions and (2) changes in ice structure using seismic interferometry. At seasonal time ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ... Conference Object glacier Svalbard DataCite Metadata Store (German National Library of Science and Technology) Kongsvegen ENVELOPE(12.657,12.657,78.854,78.854) Svalbard |
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DataCite Metadata Store (German National Library of Science and Technology) |
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description |
<!--!introduction!--> Glacier flow instabilities are mainly caused by changes at the ice-bed interface, where basal slip and sediment deformation drive basal glacier movement. Understanding basal processes and their response to external forcing remains difficult due to limited access to the glacier bed. In this study, we examine variations in subsurface and subglacial mechanical conditions of Kongsvegen glacier (Svalbard). This glacier shows strong indications of an imminent new rapid flow event. To investigate the potential causes of such an acceleration, we combine conventional measurements such as surface velocity (20 GNSS along the flow line) and basal water pressure (two boreholes) with seismic measurements (14 seismometers along the flow line and 6 seismometers in boreholes) and a unique measurement of basal drag applied to the sediments. We use our seismic measurements to study (1) subglacial hydrological conditions and (2) changes in ice structure using seismic interferometry. At seasonal time ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ... |
format |
Conference Object |
author |
Nanni, Ugo Thomas, Pauze Lucien, Goulet Andreas, Kohler Coline, Bouchayer Thomas, Schuler |
spellingShingle |
Nanni, Ugo Thomas, Pauze Lucien, Goulet Andreas, Kohler Coline, Bouchayer Thomas, Schuler Study of the structural and dynamic changes of a surging glacier using seismic observations ... |
author_facet |
Nanni, Ugo Thomas, Pauze Lucien, Goulet Andreas, Kohler Coline, Bouchayer Thomas, Schuler |
author_sort |
Nanni, Ugo |
title |
Study of the structural and dynamic changes of a surging glacier using seismic observations ... |
title_short |
Study of the structural and dynamic changes of a surging glacier using seismic observations ... |
title_full |
Study of the structural and dynamic changes of a surging glacier using seismic observations ... |
title_fullStr |
Study of the structural and dynamic changes of a surging glacier using seismic observations ... |
title_full_unstemmed |
Study of the structural and dynamic changes of a surging glacier using seismic observations ... |
title_sort |
study of the structural and dynamic changes of a surging glacier using seismic observations ... |
publisher |
GFZ German Research Centre for Geosciences |
publishDate |
2023 |
url |
https://dx.doi.org/10.57757/iugg23-1567 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018039 |
long_lat |
ENVELOPE(12.657,12.657,78.854,78.854) |
geographic |
Kongsvegen Svalbard |
geographic_facet |
Kongsvegen Svalbard |
genre |
glacier Svalbard |
genre_facet |
glacier Svalbard |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_doi |
https://doi.org/10.57757/iugg23-1567 |
_version_ |
1772182421142241280 |