Modelling of rift propagation on Ronne Ice Shelf, Antarctica, and sensitivity to climate change
The calving of icebergs from large Antarctic ice shelves is controlled mainly by the formation and propagation of rifts originating from the side margins of the ice shelf and local areas of grounding. Using InSAR, we observe the evolution of rifts along Hemmen Ice Rise, on Ronne Ice Shelf, Antarctic...
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Online Access: | https://hal.archives-ouvertes.fr/hal-00018884 https://doi.org/10.1029/2004GL020077 |
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ftccsdartic:oai:HAL:hal-00018884v1 2023-05-15T13:45:09+02:00 Modelling of rift propagation on Ronne Ice Shelf, Antarctica, and sensitivity to climate change Larour, Eric Rignot, E. Aubry, Denis Jet Propulsion Laboratory (JPL) NASA-California Institute of Technology (CALTECH) Laboratoire de mécanique des sols, structures et matériaux (MSSMat) CentraleSupélec-Centre National de la Recherche Scientifique (CNRS) 2004 https://hal.archives-ouvertes.fr/hal-00018884 https://doi.org/10.1029/2004GL020077 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2004GL020077 hal-00018884 https://hal.archives-ouvertes.fr/hal-00018884 doi:10.1029/2004GL020077 ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.archives-ouvertes.fr/hal-00018884 Geophysical Research Letters, American Geophysical Union, 2004, 31 (16), pp.L16404. ⟨10.1029/2004GL020077⟩ Sar Interferometry Dynamics Stream Crevasses Front [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] info:eu-repo/semantics/article Journal articles 2004 ftccsdartic https://doi.org/10.1029/2004GL020077 2021-06-20T00:43:29Z The calving of icebergs from large Antarctic ice shelves is controlled mainly by the formation and propagation of rifts originating from the side margins of the ice shelf and local areas of grounding. Using InSAR, we observe the evolution of rifts along Hemmen Ice Rise, on Ronne Ice Shelf, Antarctica prior to the large calving event of October 1998. We couple these observations with a computer model combining the viscous flow of an ice shelf with a linear elastic fracture mechanics description of the propagation of rifts. The model reveals that the ice melange trapped in between the rifts exerts a major control on the propagation of rifts, and in turn on ice shelf stability. Melting of the ice melange from oceanic or atmospheric warming would significantly increase the propagation rate of rifts and threaten the ice-shelf stability. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Shelf Ice Shelves Iceberg* Ronne Ice Shelf Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic Hemmen Ice Rise ENVELOPE(-49.767,-49.767,-77.950,-77.950) Ronne Ice Shelf ENVELOPE(-61.000,-61.000,-78.500,-78.500) Geophysical Research Letters 31 16 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
Sar Interferometry Dynamics Stream Crevasses Front [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
spellingShingle |
Sar Interferometry Dynamics Stream Crevasses Front [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] Larour, Eric Rignot, E. Aubry, Denis Modelling of rift propagation on Ronne Ice Shelf, Antarctica, and sensitivity to climate change |
topic_facet |
Sar Interferometry Dynamics Stream Crevasses Front [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
description |
The calving of icebergs from large Antarctic ice shelves is controlled mainly by the formation and propagation of rifts originating from the side margins of the ice shelf and local areas of grounding. Using InSAR, we observe the evolution of rifts along Hemmen Ice Rise, on Ronne Ice Shelf, Antarctica prior to the large calving event of October 1998. We couple these observations with a computer model combining the viscous flow of an ice shelf with a linear elastic fracture mechanics description of the propagation of rifts. The model reveals that the ice melange trapped in between the rifts exerts a major control on the propagation of rifts, and in turn on ice shelf stability. Melting of the ice melange from oceanic or atmospheric warming would significantly increase the propagation rate of rifts and threaten the ice-shelf stability. |
author2 |
Jet Propulsion Laboratory (JPL) NASA-California Institute of Technology (CALTECH) Laboratoire de mécanique des sols, structures et matériaux (MSSMat) CentraleSupélec-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Larour, Eric Rignot, E. Aubry, Denis |
author_facet |
Larour, Eric Rignot, E. Aubry, Denis |
author_sort |
Larour, Eric |
title |
Modelling of rift propagation on Ronne Ice Shelf, Antarctica, and sensitivity to climate change |
title_short |
Modelling of rift propagation on Ronne Ice Shelf, Antarctica, and sensitivity to climate change |
title_full |
Modelling of rift propagation on Ronne Ice Shelf, Antarctica, and sensitivity to climate change |
title_fullStr |
Modelling of rift propagation on Ronne Ice Shelf, Antarctica, and sensitivity to climate change |
title_full_unstemmed |
Modelling of rift propagation on Ronne Ice Shelf, Antarctica, and sensitivity to climate change |
title_sort |
modelling of rift propagation on ronne ice shelf, antarctica, and sensitivity to climate change |
publisher |
HAL CCSD |
publishDate |
2004 |
url |
https://hal.archives-ouvertes.fr/hal-00018884 https://doi.org/10.1029/2004GL020077 |
long_lat |
ENVELOPE(-49.767,-49.767,-77.950,-77.950) ENVELOPE(-61.000,-61.000,-78.500,-78.500) |
geographic |
Antarctic Hemmen Ice Rise Ronne Ice Shelf |
geographic_facet |
Antarctic Hemmen Ice Rise Ronne Ice Shelf |
genre |
Antarc* Antarctic Antarctica Ice Shelf Ice Shelves Iceberg* Ronne Ice Shelf |
genre_facet |
Antarc* Antarctic Antarctica Ice Shelf Ice Shelves Iceberg* Ronne Ice Shelf |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.archives-ouvertes.fr/hal-00018884 Geophysical Research Letters, American Geophysical Union, 2004, 31 (16), pp.L16404. ⟨10.1029/2004GL020077⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2004GL020077 hal-00018884 https://hal.archives-ouvertes.fr/hal-00018884 doi:10.1029/2004GL020077 |
op_doi |
https://doi.org/10.1029/2004GL020077 |
container_title |
Geophysical Research Letters |
container_volume |
31 |
container_issue |
16 |
_version_ |
1766213765369430016 |