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Seismic characterization of a rapidly-rising jökulhlaup cycle at the A.P. Olsen Ice Cap, NE-Greenland

Michael Behm, Jacob I. Walter, Daniel Binder, Feng Cheng, Michele Citterio, Bernd Kulessa Orcid Logo, Kirsty Langley, Phillipe Limpach, Stefan Mertl, Wolfgang Schöner, Mikkel Tamstorf, Gernot Weyss

Journal of Glaciology, Volume: 66, Issue: 256, Pages: 329 - 347

Swansea University Author: Bernd Kulessa Orcid Logo

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DOI (Published version): 10.1017/jog.2020.9

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...

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Published in: Journal of Glaciology
ISSN: 0022-1430 1727-5652
Published: Cambridge University Press (CUP) 2020
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URI: https://cronfa.swan.ac.uk/Record/cronfa53470
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spelling v2 53470 2020-02-07 Seismic characterization of a rapidly-rising jökulhlaup cycle at the A.P. Olsen Ice Cap, NE-Greenland 52acda616e9f6073cbebf497def874c9 0000-0002-4830-4949 Bernd Kulessa Bernd Kulessa true false 2020-02-07 BGPS 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. Journal Article Journal of Glaciology 66 256 329 347 Cambridge University Press (CUP) 0022-1430 1727-5652 1 4 2020 2020-04-01 10.1017/jog.2020.9 COLLEGE NANME Biosciences Geography and Physics School COLLEGE CODE BGPS Swansea University Another institution paid the OA fee External 2024-10-08T10:24:06.7693218 2020-02-07T14:23:22.0881250 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Geography Michael Behm 1 Jacob I. Walter 2 Daniel Binder 3 Feng Cheng 4 Michele Citterio 5 Bernd Kulessa 0000-0002-4830-4949 6 Kirsty Langley 7 Phillipe Limpach 8 Stefan Mertl 9 Wolfgang Schöner 10 Mikkel Tamstorf 11 Gernot Weyss 12 53470__16541__76558a1bd4e949baa4e36a2adfe927c8.pdf Behm 2020 AP Olsen Ice Cap Joekulhaup.pdf 2020-02-07T14:25:33.7806676 Output 2392668 application/pdf Version of Record true Released under the terms of a Creative Commons AttributionNonCommercial-ShareAlike licence (CC-BY-NC-SA). true English http://creativecommons.org/licenses/by-nc-sa/4.0/
title Seismic characterization of a rapidly-rising jökulhlaup cycle at the A.P. Olsen Ice Cap, NE-Greenland
spellingShingle Seismic characterization of a rapidly-rising jökulhlaup cycle at the A.P. Olsen Ice Cap, NE-Greenland
Bernd Kulessa
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
author_id_str_mv 52acda616e9f6073cbebf497def874c9
author_id_fullname_str_mv 52acda616e9f6073cbebf497def874c9_***_Bernd Kulessa
author Bernd Kulessa
author2 Michael Behm
Jacob I. Walter
Daniel Binder
Feng Cheng
Michele Citterio
Bernd Kulessa
Kirsty Langley
Phillipe Limpach
Stefan Mertl
Wolfgang Schöner
Mikkel Tamstorf
Gernot Weyss
format Journal article
container_title Journal of Glaciology
container_volume 66
container_issue 256
container_start_page 329
publishDate 2020
institution Swansea University
issn 0022-1430
1727-5652
doi_str_mv 10.1017/jog.2020.9
publisher Cambridge University Press (CUP)
college_str Faculty of Science and Engineering
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hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Geography{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Geography
document_store_str 1
active_str 0
description 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.
published_date 2020-04-01T10:24:06Z
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