Thinning leads to calving-style changes at Bowdoin Glacier, Greenland
This research has been supported by the Alfred and Flora Spälti Fund and the ETH Zurich Foundation (Sun2ice; grant no. ETH-12 16-2); the Swiss National Science Foundation (grant nos. 200021-153179/1 and PP00P2_183719); the SPI Exploratory Grants 2018 awarded to Fabian Walter and Guillaume Jouvet; th...
Published in: | The Cryosphere |
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ftstandrewserep:oai:research-repository.st-andrews.ac.uk:10023/21547 2023-07-02T03:31:27+02:00 Thinning leads to calving-style changes at Bowdoin Glacier, Greenland van Dongen, Eef C.H. Jouvet, Guillaume Sugiyama, Shin Podolskiy, Evgeny A. Funk, Martin Benn, Douglas I. Lindner, Fabian Bauder, Andreas Seguinot, Julien Leinss, Silvan Walter, Fabian NERC University of St Andrews. School of Geography & Sustainable Development University of St Andrews. Bell-Edwards Geographic Data Institute University of St Andrews. Environmental Change Research Group 2021-03-03T14:30:02Z 16 application/pdf http://hdl.handle.net/10023/21547 https://doi.org/10.5194/tc-15-485-2021 eng eng Cryosphere van Dongen , E C H , Jouvet , G , Sugiyama , S , Podolskiy , E A , Funk , M , Benn , D I , Lindner , F , Bauder , A , Seguinot , J , Leinss , S & Walter , F 2021 , ' Thinning leads to calving-style changes at Bowdoin Glacier, Greenland ' , Cryosphere , vol. 15 , no. 2 , pp. 485-500 . https://doi.org/10.5194/tc-15-485-2021 1994-0416 PURE: 273107252 PURE UUID: 00466b92-f818-43ff-9ae8-bcdb8a5e9620 Scopus: 85100575516 ORCID: /0000-0002-3604-0886/work/90111864 WOS: 000618062200001 http://hdl.handle.net/10023/21547 https://doi.org/10.5194/tc-15-485-2021 NE-P011365/1 Copyright © Author(s) 2021. This work is distributed under the Creative Commons Attribution 4.0 License. GE Environmental Sciences Water Science and Technology Earth-Surface Processes DAS GE Journal article 2021 ftstandrewserep https://doi.org/10.5194/tc-15-485-2021 2023-06-13T18:27:53Z This research has been supported by the Alfred and Flora Spälti Fund and the ETH Zurich Foundation (Sun2ice; grant no. ETH-12 16-2); the Swiss National Science Foundation (grant nos. 200021-153179/1 and PP00P2_183719); the SPI Exploratory Grants 2018 awarded to Fabian Walter and Guillaume Jouvet; the Japanese Ministry of Education, Culture, Sports, Science and Technology through the GRENE Arctic Climate Research Project and the Arctic Challenge for Sustainability (ArCS) project; and by NERC (CALISMO: Calving Laws for Ice Sheet Models; grant no. NE/P011365/1). Ice mass loss from the Greenland ice sheet is the largest single contributor to sea level rise in the 21st century. The mass loss rate has accelerated in recent decades mainly due to thinning and retreat of its outlet glaciers. The diverse calving mechanisms responsible for tidewater glacier retreat are not fully understood yet. Since a tidewater glacier's sensitivity to external forcings depends on its calving style, detailed insight into calving processes is necessary to improve projections of ice sheet mass loss by calving. As tidewater glaciers are mostly thinning, their calving styles are expected to change. Here, we study calving behaviour changes under a thinning regime at Bowdoin Glacier, north-western Greenland, by combining field and remote-sensing data from 2015 to 2019. Previous studies showed that major calving events in 2015 and 2017 were driven by hydro-fracturing and melt-undercutting. New observations from uncrewed aerial vehicle (UAV) imagery and a GPS network installed at the calving front in 2019 suggest ungrounding and buoyant calving have recently occurred as they show (1) increasing tidal modulation of vertical motion compared to previous years, (2) absence of a surface crevasse prior to calving, and (3) uplift and horizontal surface compression prior to calving. Furthermore, an inventory of calving events from 2015 to 2019 based on satellite imagery provides additional support for a change towards buoyant calving since it shows an ... Article in Journal/Newspaper Arctic glacier Greenland Ice Sheet Tidewater University of St Andrews: Digital Research Repository Arctic Bowdoin ENVELOPE(-69.317,-69.317,77.683,77.683) Greenland Guillaume ENVELOPE(70.150,70.150,-49.350,-49.350) The Cryosphere 15 2 485 500 |
institution |
Open Polar |
collection |
University of St Andrews: Digital Research Repository |
op_collection_id |
ftstandrewserep |
language |
English |
topic |
GE Environmental Sciences Water Science and Technology Earth-Surface Processes DAS GE |
spellingShingle |
GE Environmental Sciences Water Science and Technology Earth-Surface Processes DAS GE van Dongen, Eef C.H. Jouvet, Guillaume Sugiyama, Shin Podolskiy, Evgeny A. Funk, Martin Benn, Douglas I. Lindner, Fabian Bauder, Andreas Seguinot, Julien Leinss, Silvan Walter, Fabian Thinning leads to calving-style changes at Bowdoin Glacier, Greenland |
topic_facet |
GE Environmental Sciences Water Science and Technology Earth-Surface Processes DAS GE |
description |
This research has been supported by the Alfred and Flora Spälti Fund and the ETH Zurich Foundation (Sun2ice; grant no. ETH-12 16-2); the Swiss National Science Foundation (grant nos. 200021-153179/1 and PP00P2_183719); the SPI Exploratory Grants 2018 awarded to Fabian Walter and Guillaume Jouvet; the Japanese Ministry of Education, Culture, Sports, Science and Technology through the GRENE Arctic Climate Research Project and the Arctic Challenge for Sustainability (ArCS) project; and by NERC (CALISMO: Calving Laws for Ice Sheet Models; grant no. NE/P011365/1). Ice mass loss from the Greenland ice sheet is the largest single contributor to sea level rise in the 21st century. The mass loss rate has accelerated in recent decades mainly due to thinning and retreat of its outlet glaciers. The diverse calving mechanisms responsible for tidewater glacier retreat are not fully understood yet. Since a tidewater glacier's sensitivity to external forcings depends on its calving style, detailed insight into calving processes is necessary to improve projections of ice sheet mass loss by calving. As tidewater glaciers are mostly thinning, their calving styles are expected to change. Here, we study calving behaviour changes under a thinning regime at Bowdoin Glacier, north-western Greenland, by combining field and remote-sensing data from 2015 to 2019. Previous studies showed that major calving events in 2015 and 2017 were driven by hydro-fracturing and melt-undercutting. New observations from uncrewed aerial vehicle (UAV) imagery and a GPS network installed at the calving front in 2019 suggest ungrounding and buoyant calving have recently occurred as they show (1) increasing tidal modulation of vertical motion compared to previous years, (2) absence of a surface crevasse prior to calving, and (3) uplift and horizontal surface compression prior to calving. Furthermore, an inventory of calving events from 2015 to 2019 based on satellite imagery provides additional support for a change towards buoyant calving since it shows an ... |
author2 |
NERC University of St Andrews. School of Geography & Sustainable Development University of St Andrews. Bell-Edwards Geographic Data Institute University of St Andrews. Environmental Change Research Group |
format |
Article in Journal/Newspaper |
author |
van Dongen, Eef C.H. Jouvet, Guillaume Sugiyama, Shin Podolskiy, Evgeny A. Funk, Martin Benn, Douglas I. Lindner, Fabian Bauder, Andreas Seguinot, Julien Leinss, Silvan Walter, Fabian |
author_facet |
van Dongen, Eef C.H. Jouvet, Guillaume Sugiyama, Shin Podolskiy, Evgeny A. Funk, Martin Benn, Douglas I. Lindner, Fabian Bauder, Andreas Seguinot, Julien Leinss, Silvan Walter, Fabian |
author_sort |
van Dongen, Eef C.H. |
title |
Thinning leads to calving-style changes at Bowdoin Glacier, Greenland |
title_short |
Thinning leads to calving-style changes at Bowdoin Glacier, Greenland |
title_full |
Thinning leads to calving-style changes at Bowdoin Glacier, Greenland |
title_fullStr |
Thinning leads to calving-style changes at Bowdoin Glacier, Greenland |
title_full_unstemmed |
Thinning leads to calving-style changes at Bowdoin Glacier, Greenland |
title_sort |
thinning leads to calving-style changes at bowdoin glacier, greenland |
publishDate |
2021 |
url |
http://hdl.handle.net/10023/21547 https://doi.org/10.5194/tc-15-485-2021 |
long_lat |
ENVELOPE(-69.317,-69.317,77.683,77.683) ENVELOPE(70.150,70.150,-49.350,-49.350) |
geographic |
Arctic Bowdoin Greenland Guillaume |
geographic_facet |
Arctic Bowdoin Greenland Guillaume |
genre |
Arctic glacier Greenland Ice Sheet Tidewater |
genre_facet |
Arctic glacier Greenland Ice Sheet Tidewater |
op_relation |
Cryosphere van Dongen , E C H , Jouvet , G , Sugiyama , S , Podolskiy , E A , Funk , M , Benn , D I , Lindner , F , Bauder , A , Seguinot , J , Leinss , S & Walter , F 2021 , ' Thinning leads to calving-style changes at Bowdoin Glacier, Greenland ' , Cryosphere , vol. 15 , no. 2 , pp. 485-500 . https://doi.org/10.5194/tc-15-485-2021 1994-0416 PURE: 273107252 PURE UUID: 00466b92-f818-43ff-9ae8-bcdb8a5e9620 Scopus: 85100575516 ORCID: /0000-0002-3604-0886/work/90111864 WOS: 000618062200001 http://hdl.handle.net/10023/21547 https://doi.org/10.5194/tc-15-485-2021 NE-P011365/1 |
op_rights |
Copyright © Author(s) 2021. This work is distributed under the Creative Commons Attribution 4.0 License. |
op_doi |
https://doi.org/10.5194/tc-15-485-2021 |
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The Cryosphere |
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15 |
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485 |
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1770270840475090944 |