Monitoring Greenland ice sheet buoyancy-driven calving discharge using glacial earthquakes
International audience Since the 2000s, Greenland ice sheet mass loss has been accelerating, followed by increasing numbers of glacial earthquakes (GEs) at near-grounded glaciers. GEs are caused by calving of km-scale icebergs which capsize against the terminus. Seismic record inversion allows a rec...
Published in: | Annals of Glaciology |
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Main Authors: | , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2019
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Subjects: | |
Online Access: | https://hal.science/hal-02139311 https://hal.science/hal-02139311v2/document https://hal.science/hal-02139311v2/file/PIMM_AG_2019_SERGEANT.pdf https://doi.org/10.1017/aog.2019.7 |
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fthesamuniv:oai:HAL:hal-02139311v2 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
HAL HESAM Université |
op_collection_id |
fthesamuniv |
language |
English |
topic |
Seismology Iceberg calving Climate change Glacier calving Glacier discharge [SPI]Engineering Sciences [physics] |
spellingShingle |
Seismology Iceberg calving Climate change Glacier calving Glacier discharge [SPI]Engineering Sciences [physics] Sergeant, Amandine Mangeney, Anne Yastrebov, Vladislav A. Walter, Fabian S.A. Montagner, Jean Paul Castelnau, Olivier Stutzmann, Eléonore Bonnet, Pauline Ralaiarisoa, Velotioana Jean-Luc Bevan, Suzanne Luckman, Adrian J. Monitoring Greenland ice sheet buoyancy-driven calving discharge using glacial earthquakes |
topic_facet |
Seismology Iceberg calving Climate change Glacier calving Glacier discharge [SPI]Engineering Sciences [physics] |
description |
International audience Since the 2000s, Greenland ice sheet mass loss has been accelerating, followed by increasing numbers of glacial earthquakes (GEs) at near-grounded glaciers. GEs are caused by calving of km-scale icebergs which capsize against the terminus. Seismic record inversion allows a reconstruction of the history of GE sources which captures capsize dynamics through iceberg-to-terminus contact. When compared with a catalog of contact forces from an iceberg capsize model, seismic force history accurately computes calving volumes while the earthquake magnitude fails to uniquely characterize iceberg size, giving errors up to 1 km 3 . Calving determined from GEs recorded ateight glaciers in 1993-2013 accounts for up to 21% of the associated discharge and 6% of the Greenland mass loss. The proportion of discharge attributed to capsizing calving may be underestimated by at least 10% as numerous events could not be identified by standard seismic detections (Olsen and Nettles, 2018). While calving production tends to stabilize in East Greenland, Western glaciers have released more and larger icebergs since 2010 and have become major contributors to Greenland dynamic discharge. Production of GEs and calving behavior are controlled by glacier geometry with bigger icebergs being produced when the terminus advances in deepening water. We illustrate how GEs can help in partitioning and monitoring Greenland mass loss and characterizing capsize dynamics. |
author2 |
Institut de Physique du Globe de Paris (IPGP) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS) Laboratoire Jacques-Louis Lions (LJLL (UMR_7598)) Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Centre des Matériaux (CDM) Mines Paris - PSL (École nationale supérieure des mines de Paris) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology Zürich (ETH Zürich) Laboratoire Procédés et Ingénierie en Mécanique et Matériaux (PIMM) Conservatoire National des Arts et Métiers CNAM (CNAM)-Centre National de la Recherche Scientifique (CNRS)-Arts et Métiers Sciences et Technologies HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM) Department of Geography Swansea Swansea University ANR-11-BS01-0016,LANDQUAKES,Modélisation des glissements de terrain et des ondes sismiques générées pour détecter et comprendre les instabilités gravitaires(2011) |
format |
Article in Journal/Newspaper |
author |
Sergeant, Amandine Mangeney, Anne Yastrebov, Vladislav A. Walter, Fabian S.A. Montagner, Jean Paul Castelnau, Olivier Stutzmann, Eléonore Bonnet, Pauline Ralaiarisoa, Velotioana Jean-Luc Bevan, Suzanne Luckman, Adrian J. |
author_facet |
Sergeant, Amandine Mangeney, Anne Yastrebov, Vladislav A. Walter, Fabian S.A. Montagner, Jean Paul Castelnau, Olivier Stutzmann, Eléonore Bonnet, Pauline Ralaiarisoa, Velotioana Jean-Luc Bevan, Suzanne Luckman, Adrian J. |
author_sort |
Sergeant, Amandine |
title |
Monitoring Greenland ice sheet buoyancy-driven calving discharge using glacial earthquakes |
title_short |
Monitoring Greenland ice sheet buoyancy-driven calving discharge using glacial earthquakes |
title_full |
Monitoring Greenland ice sheet buoyancy-driven calving discharge using glacial earthquakes |
title_fullStr |
Monitoring Greenland ice sheet buoyancy-driven calving discharge using glacial earthquakes |
title_full_unstemmed |
Monitoring Greenland ice sheet buoyancy-driven calving discharge using glacial earthquakes |
title_sort |
monitoring greenland ice sheet buoyancy-driven calving discharge using glacial earthquakes |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.science/hal-02139311 https://hal.science/hal-02139311v2/document https://hal.science/hal-02139311v2/file/PIMM_AG_2019_SERGEANT.pdf https://doi.org/10.1017/aog.2019.7 |
genre |
Annals of Glaciology East Greenland glacier Greenland Ice Sheet |
genre_facet |
Annals of Glaciology East Greenland glacier Greenland Ice Sheet |
op_source |
ISSN: 0260-3055 EISSN: 1727-5644 Annals of Glaciology https://hal.science/hal-02139311 Annals of Glaciology, 2019, pp.1- 21. ⟨10.1017/aog.2019.7⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1017/aog.2019.7 hal-02139311 https://hal.science/hal-02139311 https://hal.science/hal-02139311v2/document https://hal.science/hal-02139311v2/file/PIMM_AG_2019_SERGEANT.pdf doi:10.1017/aog.2019.7 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1017/aog.2019.7 |
container_title |
Annals of Glaciology |
container_volume |
60 |
container_issue |
79 |
container_start_page |
75 |
op_container_end_page |
95 |
_version_ |
1810483293570727936 |
spelling |
fthesamuniv:oai:HAL:hal-02139311v2 2024-09-15T17:39:53+00:00 Monitoring Greenland ice sheet buoyancy-driven calving discharge using glacial earthquakes Sergeant, Amandine Mangeney, Anne Yastrebov, Vladislav A. Walter, Fabian S.A. Montagner, Jean Paul Castelnau, Olivier Stutzmann, Eléonore Bonnet, Pauline Ralaiarisoa, Velotioana Jean-Luc Bevan, Suzanne Luckman, Adrian J. Institut de Physique du Globe de Paris (IPGP) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS) Laboratoire Jacques-Louis Lions (LJLL (UMR_7598)) Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Centre des Matériaux (CDM) Mines Paris - PSL (École nationale supérieure des mines de Paris) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology Zürich (ETH Zürich) Laboratoire Procédés et Ingénierie en Mécanique et Matériaux (PIMM) Conservatoire National des Arts et Métiers CNAM (CNAM)-Centre National de la Recherche Scientifique (CNRS)-Arts et Métiers Sciences et Technologies HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM) Department of Geography Swansea Swansea University ANR-11-BS01-0016,LANDQUAKES,Modélisation des glissements de terrain et des ondes sismiques générées pour détecter et comprendre les instabilités gravitaires(2011) 2019 https://hal.science/hal-02139311 https://hal.science/hal-02139311v2/document https://hal.science/hal-02139311v2/file/PIMM_AG_2019_SERGEANT.pdf https://doi.org/10.1017/aog.2019.7 en eng HAL CCSD Cambridge University Press info:eu-repo/semantics/altIdentifier/doi/10.1017/aog.2019.7 hal-02139311 https://hal.science/hal-02139311 https://hal.science/hal-02139311v2/document https://hal.science/hal-02139311v2/file/PIMM_AG_2019_SERGEANT.pdf doi:10.1017/aog.2019.7 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0260-3055 EISSN: 1727-5644 Annals of Glaciology https://hal.science/hal-02139311 Annals of Glaciology, 2019, pp.1- 21. ⟨10.1017/aog.2019.7⟩ Seismology Iceberg calving Climate change Glacier calving Glacier discharge [SPI]Engineering Sciences [physics] info:eu-repo/semantics/article Journal articles 2019 fthesamuniv https://doi.org/10.1017/aog.2019.7 2024-08-28T23:37:21Z International audience Since the 2000s, Greenland ice sheet mass loss has been accelerating, followed by increasing numbers of glacial earthquakes (GEs) at near-grounded glaciers. GEs are caused by calving of km-scale icebergs which capsize against the terminus. Seismic record inversion allows a reconstruction of the history of GE sources which captures capsize dynamics through iceberg-to-terminus contact. When compared with a catalog of contact forces from an iceberg capsize model, seismic force history accurately computes calving volumes while the earthquake magnitude fails to uniquely characterize iceberg size, giving errors up to 1 km 3 . Calving determined from GEs recorded ateight glaciers in 1993-2013 accounts for up to 21% of the associated discharge and 6% of the Greenland mass loss. The proportion of discharge attributed to capsizing calving may be underestimated by at least 10% as numerous events could not be identified by standard seismic detections (Olsen and Nettles, 2018). While calving production tends to stabilize in East Greenland, Western glaciers have released more and larger icebergs since 2010 and have become major contributors to Greenland dynamic discharge. Production of GEs and calving behavior are controlled by glacier geometry with bigger icebergs being produced when the terminus advances in deepening water. We illustrate how GEs can help in partitioning and monitoring Greenland mass loss and characterizing capsize dynamics. Article in Journal/Newspaper Annals of Glaciology East Greenland glacier Greenland Ice Sheet HAL HESAM Université Annals of Glaciology 60 79 75 95 |