Seismic characterization of a rapidly-rising jökulhlaup cycle at the A.P. Olsen Ice Cap, NE-Greenland
Abstract Rapidly-rising jökulhlaups, or glacial outburst floods, are a phenomenon with a high potential for damage. The initiation and propagation processes of a rapidly-rising jökulhlaup are still not fully understood. Seismic monitoring can contribute to an improved process understanding, but comp...
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Language: | English |
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Cambridge University Press (CUP)
2020
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Online Access: | http://dx.doi.org/10.1017/jog.2020.9 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214302000009X |
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crcambridgeupr:10.1017/jog.2020.9 2024-09-15T18:09:27+00:00 Seismic characterization of a rapidly-rising jökulhlaup cycle at the A.P. Olsen Ice Cap, NE-Greenland Behm, Michael Walter, Jacob I. Binder, Daniel Cheng, Feng Citterio, Michele Kulessa, Bernd Langley, Kirsty Limpach, Phillipe Mertl, Stefan Schöner, Wolfgang Tamstorf, Mikkel Weyss, Gernot 2020 http://dx.doi.org/10.1017/jog.2020.9 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214302000009X en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by-nc-sa/4.0/ Journal of Glaciology volume 66, issue 256, page 329-347 ISSN 0022-1430 1727-5652 journal-article 2020 crcambridgeupr https://doi.org/10.1017/jog.2020.9 2024-07-17T04:03:05Z Abstract Rapidly-rising jökulhlaups, or glacial outburst floods, are a phenomenon with a high potential for damage. The initiation and propagation processes of a rapidly-rising jökulhlaup are still not fully understood. Seismic monitoring can contribute to an improved process understanding, but comprehensive long-term seismic monitoring campaigns capturing the dynamics of a rapidly-rising jökulhlaup have not been reported so far. To fill this gap, we installed a seismic network at the marginal, ice-dammed lake of the A.P. Olsen Ice Cap (APO) in NE-Greenland. Episodic outbursts from the lake cause flood waves in the Zackenberg river, characterized by a rapid discharge increase within a few hours. Our 6 months long seismic dataset comprises the whole fill-and-drain cycle of the ice-dammed lake in 2012 and includes one of the most destructive floods recorded so far for the Zackenberg river. Seismic event detection and localization reveals abundant surface crevassing and correlates with changes of the river discharge. Seismic interferometry suggests the existence of a thin basal sedimentary layer. We show that the ballistic part of the first surface waves can potentially be used to infer medium changes in both the ice body and the basal layer. Interpretation of time-lapse interferograms is challenged by a varying ambient noise source distribution. Article in Journal/Newspaper Greenland Ice cap Journal of Glaciology Zackenberg Cambridge University Press Journal of Glaciology 66 256 329 347 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Abstract Rapidly-rising jökulhlaups, or glacial outburst floods, are a phenomenon with a high potential for damage. The initiation and propagation processes of a rapidly-rising jökulhlaup are still not fully understood. Seismic monitoring can contribute to an improved process understanding, but comprehensive long-term seismic monitoring campaigns capturing the dynamics of a rapidly-rising jökulhlaup have not been reported so far. To fill this gap, we installed a seismic network at the marginal, ice-dammed lake of the A.P. Olsen Ice Cap (APO) in NE-Greenland. Episodic outbursts from the lake cause flood waves in the Zackenberg river, characterized by a rapid discharge increase within a few hours. Our 6 months long seismic dataset comprises the whole fill-and-drain cycle of the ice-dammed lake in 2012 and includes one of the most destructive floods recorded so far for the Zackenberg river. Seismic event detection and localization reveals abundant surface crevassing and correlates with changes of the river discharge. Seismic interferometry suggests the existence of a thin basal sedimentary layer. We show that the ballistic part of the first surface waves can potentially be used to infer medium changes in both the ice body and the basal layer. Interpretation of time-lapse interferograms is challenged by a varying ambient noise source distribution. |
format |
Article in Journal/Newspaper |
author |
Behm, Michael Walter, Jacob I. Binder, Daniel Cheng, Feng Citterio, Michele Kulessa, Bernd Langley, Kirsty Limpach, Phillipe Mertl, Stefan Schöner, Wolfgang Tamstorf, Mikkel Weyss, Gernot |
spellingShingle |
Behm, Michael Walter, Jacob I. Binder, Daniel Cheng, Feng Citterio, Michele Kulessa, Bernd Langley, Kirsty Limpach, Phillipe Mertl, Stefan Schöner, Wolfgang Tamstorf, Mikkel Weyss, Gernot Seismic characterization of a rapidly-rising jökulhlaup cycle at the A.P. Olsen Ice Cap, NE-Greenland |
author_facet |
Behm, Michael Walter, Jacob I. Binder, Daniel Cheng, Feng Citterio, Michele Kulessa, Bernd Langley, Kirsty Limpach, Phillipe Mertl, Stefan Schöner, Wolfgang Tamstorf, Mikkel Weyss, Gernot |
author_sort |
Behm, Michael |
title |
Seismic characterization of a rapidly-rising jökulhlaup cycle at the A.P. Olsen Ice Cap, NE-Greenland |
title_short |
Seismic characterization of a rapidly-rising jökulhlaup cycle at the A.P. Olsen Ice Cap, NE-Greenland |
title_full |
Seismic characterization of a rapidly-rising jökulhlaup cycle at the A.P. Olsen Ice Cap, NE-Greenland |
title_fullStr |
Seismic characterization of a rapidly-rising jökulhlaup cycle at the A.P. Olsen Ice Cap, NE-Greenland |
title_full_unstemmed |
Seismic characterization of a rapidly-rising jökulhlaup cycle at the A.P. Olsen Ice Cap, NE-Greenland |
title_sort |
seismic characterization of a rapidly-rising jökulhlaup cycle at the a.p. olsen ice cap, ne-greenland |
publisher |
Cambridge University Press (CUP) |
publishDate |
2020 |
url |
http://dx.doi.org/10.1017/jog.2020.9 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214302000009X |
genre |
Greenland Ice cap Journal of Glaciology Zackenberg |
genre_facet |
Greenland Ice cap Journal of Glaciology Zackenberg |
op_source |
Journal of Glaciology volume 66, issue 256, page 329-347 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by-nc-sa/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2020.9 |
container_title |
Journal of Glaciology |
container_volume |
66 |
container_issue |
256 |
container_start_page |
329 |
op_container_end_page |
347 |
_version_ |
1810447010246950912 |