From high friction zone to frontal collapse: dynamics of an ongoing tidewater glacier surge, Negribreen, Svalbard
Negribreen, a tidewater glacier located in central eastern Svalbard, began actively surging after it experienced an initial collapse in summer 2016. The surge resulted in horizontal surface velocities of more than 25 m d−1, making it one of the fastest-flowing glaciers in the archipelago. The last s...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/408294 2023-12-03T10:23:08+01:00 From high friction zone to frontal collapse: dynamics of an ongoing tidewater glacier surge, Negribreen, Svalbard Haga, Odin Næss McNabb, Robert Nuth, Christopher Altena, B. Schellenberger, Thomas Kääb, A. Sub Dynamics Meteorology Marine and Atmospheric Research 2020-10 application/pdf https://dspace.library.uu.nl/handle/1874/408294 en eng 0022-1430 https://dspace.library.uu.nl/handle/1874/408294 info:eu-repo/semantics/OpenAccess Glacier surges ice velocity remote sensing Article 2020 ftunivutrecht 2023-11-08T23:18:46Z Negribreen, a tidewater glacier located in central eastern Svalbard, began actively surging after it experienced an initial collapse in summer 2016. The surge resulted in horizontal surface velocities of more than 25 m d−1, making it one of the fastest-flowing glaciers in the archipelago. The last surge of Negribreen likely occurred in the 1930s, but due to a long quiescent phase, investigations of this glacier have been limited. As Negribreen is part of the Negribreen Glacier System, one of the largest glacier systems in Svalbard, investigating its current surge event provides important information on surge behaviour among tidewater glaciers within the region. Here, we demonstrate the surge development and discuss triggering mechanisms using time series of digital elevation models (1969–2018), surface velocities (1995–2018), crevasse patterns and glacier extents from various data sources. We find that the active surge results from a four-stage process. Stage 1 (quiescent phase) involves a long-term, gradual geometry change due to high subglacial friction towards the terminus. These changes allow the onset of Stage 2, an accelerating frontal destabilization, which ultimately results in the collapse (Stage 3) and active surge (Stage 4). Article in Journal/Newspaper glacier Svalbard Tidewater Utrecht University Repository Negribreen ENVELOPE(19.150,19.150,78.564,78.564) Svalbard |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
topic |
Glacier surges ice velocity remote sensing |
spellingShingle |
Glacier surges ice velocity remote sensing Haga, Odin Næss McNabb, Robert Nuth, Christopher Altena, B. Schellenberger, Thomas Kääb, A. From high friction zone to frontal collapse: dynamics of an ongoing tidewater glacier surge, Negribreen, Svalbard |
topic_facet |
Glacier surges ice velocity remote sensing |
description |
Negribreen, a tidewater glacier located in central eastern Svalbard, began actively surging after it experienced an initial collapse in summer 2016. The surge resulted in horizontal surface velocities of more than 25 m d−1, making it one of the fastest-flowing glaciers in the archipelago. The last surge of Negribreen likely occurred in the 1930s, but due to a long quiescent phase, investigations of this glacier have been limited. As Negribreen is part of the Negribreen Glacier System, one of the largest glacier systems in Svalbard, investigating its current surge event provides important information on surge behaviour among tidewater glaciers within the region. Here, we demonstrate the surge development and discuss triggering mechanisms using time series of digital elevation models (1969–2018), surface velocities (1995–2018), crevasse patterns and glacier extents from various data sources. We find that the active surge results from a four-stage process. Stage 1 (quiescent phase) involves a long-term, gradual geometry change due to high subglacial friction towards the terminus. These changes allow the onset of Stage 2, an accelerating frontal destabilization, which ultimately results in the collapse (Stage 3) and active surge (Stage 4). |
author2 |
Sub Dynamics Meteorology Marine and Atmospheric Research |
format |
Article in Journal/Newspaper |
author |
Haga, Odin Næss McNabb, Robert Nuth, Christopher Altena, B. Schellenberger, Thomas Kääb, A. |
author_facet |
Haga, Odin Næss McNabb, Robert Nuth, Christopher Altena, B. Schellenberger, Thomas Kääb, A. |
author_sort |
Haga, Odin Næss |
title |
From high friction zone to frontal collapse: dynamics of an ongoing tidewater glacier surge, Negribreen, Svalbard |
title_short |
From high friction zone to frontal collapse: dynamics of an ongoing tidewater glacier surge, Negribreen, Svalbard |
title_full |
From high friction zone to frontal collapse: dynamics of an ongoing tidewater glacier surge, Negribreen, Svalbard |
title_fullStr |
From high friction zone to frontal collapse: dynamics of an ongoing tidewater glacier surge, Negribreen, Svalbard |
title_full_unstemmed |
From high friction zone to frontal collapse: dynamics of an ongoing tidewater glacier surge, Negribreen, Svalbard |
title_sort |
from high friction zone to frontal collapse: dynamics of an ongoing tidewater glacier surge, negribreen, svalbard |
publishDate |
2020 |
url |
https://dspace.library.uu.nl/handle/1874/408294 |
long_lat |
ENVELOPE(19.150,19.150,78.564,78.564) |
geographic |
Negribreen Svalbard |
geographic_facet |
Negribreen Svalbard |
genre |
glacier Svalbard Tidewater |
genre_facet |
glacier Svalbard Tidewater |
op_relation |
0022-1430 https://dspace.library.uu.nl/handle/1874/408294 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1784271177261252608 |