Calving Induced Speedup of Petermann Glacier
This study assesses the response on ice dynamics of Petermann Glacier, a major outlet glacier in northern Greenland, to the 2012 and a possible future calving event. So far Petermann Glacier has been believed to be dynamically stable as another large calving event in 2010 had no significant impact o...
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ftunivbruxelles:oai:dipot.ulb.ac.be:2013/284949 2023-05-15T16:21:19+02:00 Calving Induced Speedup of Petermann Glacier Rückamp, M. Neckel, Niklas Berger, Sophie Humbert, A. Helm, Veit 2019-01 No full-text files http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/284949 en eng uri/info:doi/10.1029/2018JF004775 uri/info:scp/85060592035 http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/284949 Journal of Geophysical Research: Earth Surface, 124 (1 Sciences de la terre et du cosmos Géographie physique Phénomènes atmosphériques Sciences de l'espace info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 2019 ftunivbruxelles 2022-06-12T21:53:54Z This study assesses the response on ice dynamics of Petermann Glacier, a major outlet glacier in northern Greenland, to the 2012 and a possible future calving event. So far Petermann Glacier has been believed to be dynamically stable as another large calving event in 2010 had no significant impact on flow velocity or grounding line retreat. By analyzing a time series of remotely sensed surface velocities, we find an average acceleration of 10% between winter 2011/2012 and winter 2016/2017. This increase in surface velocity is not linear but can be separated into two parts, starting in 2012 and 2016 respectively. By conducting modeling experiments, we show that the first speedup can be directly connected to the 2012 calving event, while the second speedup is not captured. However, on recent remote sensing imagery newly developing fractures are clearly visible ∼12 km upstream from the terminus, propagating from the eastern fjord wall to the center of the ice tongue, indicating a possible future calving event. By including these fracture zones as a new terminus position in the modeling domain, we are able to reproduce the second speedup, suggesting that surface velocities remain on the 2016/2017 level after the anticipated calving event. This indicates that, from a dynamical point of view, the terminus region has already detached from the main ice tongue. SCOPUS: ar.j DecretOANoAutActif info:eu-repo/semantics/published Article in Journal/Newspaper glacier Greenland Petermann glacier DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) Greenland |
institution |
Open Polar |
collection |
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
op_collection_id |
ftunivbruxelles |
language |
English |
topic |
Sciences de la terre et du cosmos Géographie physique Phénomènes atmosphériques Sciences de l'espace |
spellingShingle |
Sciences de la terre et du cosmos Géographie physique Phénomènes atmosphériques Sciences de l'espace Rückamp, M. Neckel, Niklas Berger, Sophie Humbert, A. Helm, Veit Calving Induced Speedup of Petermann Glacier |
topic_facet |
Sciences de la terre et du cosmos Géographie physique Phénomènes atmosphériques Sciences de l'espace |
description |
This study assesses the response on ice dynamics of Petermann Glacier, a major outlet glacier in northern Greenland, to the 2012 and a possible future calving event. So far Petermann Glacier has been believed to be dynamically stable as another large calving event in 2010 had no significant impact on flow velocity or grounding line retreat. By analyzing a time series of remotely sensed surface velocities, we find an average acceleration of 10% between winter 2011/2012 and winter 2016/2017. This increase in surface velocity is not linear but can be separated into two parts, starting in 2012 and 2016 respectively. By conducting modeling experiments, we show that the first speedup can be directly connected to the 2012 calving event, while the second speedup is not captured. However, on recent remote sensing imagery newly developing fractures are clearly visible ∼12 km upstream from the terminus, propagating from the eastern fjord wall to the center of the ice tongue, indicating a possible future calving event. By including these fracture zones as a new terminus position in the modeling domain, we are able to reproduce the second speedup, suggesting that surface velocities remain on the 2016/2017 level after the anticipated calving event. This indicates that, from a dynamical point of view, the terminus region has already detached from the main ice tongue. SCOPUS: ar.j DecretOANoAutActif info:eu-repo/semantics/published |
format |
Article in Journal/Newspaper |
author |
Rückamp, M. Neckel, Niklas Berger, Sophie Humbert, A. Helm, Veit |
author_facet |
Rückamp, M. Neckel, Niklas Berger, Sophie Humbert, A. Helm, Veit |
author_sort |
Rückamp, M. |
title |
Calving Induced Speedup of Petermann Glacier |
title_short |
Calving Induced Speedup of Petermann Glacier |
title_full |
Calving Induced Speedup of Petermann Glacier |
title_fullStr |
Calving Induced Speedup of Petermann Glacier |
title_full_unstemmed |
Calving Induced Speedup of Petermann Glacier |
title_sort |
calving induced speedup of petermann glacier |
publishDate |
2019 |
url |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/284949 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
glacier Greenland Petermann glacier |
genre_facet |
glacier Greenland Petermann glacier |
op_source |
Journal of Geophysical Research: Earth Surface, 124 (1 |
op_relation |
uri/info:doi/10.1029/2018JF004775 uri/info:scp/85060592035 http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/284949 |
_version_ |
1766009322288971776 |