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...
Published in: | Geophysical Research Letters |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
eScholarship, University of California
2004
|
Subjects: | |
Online Access: | http://www.escholarship.org/uc/item/95q1w4nt |
id |
ftcdlib:qt95q1w4nt |
---|---|
record_format |
openpolar |
spelling |
ftcdlib:qt95q1w4nt 2023-05-15T13:58:53+02:00 Modelling of rift propagation on Ronne Ice Shelf, Antarctica, and sensitivity to climate change Larour, E Rignot, E Aubry, D L16404 1-4 2004-08-28 application/pdf http://www.escholarship.org/uc/item/95q1w4nt english eng eScholarship, University of California qt95q1w4nt http://www.escholarship.org/uc/item/95q1w4nt Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ CC-BY Larour, E; Rignot, E; & Aubry, D. (2004). Modelling of rift propagation on Ronne Ice Shelf, Antarctica, and sensitivity to climate change. Geophysical Research Letters, 31(16), L16404 1-4. doi:10.1029/2004GL020077. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/95q1w4nt article 2004 ftcdlib https://doi.org/10.1029/2004GL020077 2017-10-13T22:51:10Z 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. Copyright 2004 by the American Geophysical Union. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Shelf Ice Shelves Iceberg* Ronne Ice Shelf University of California: eScholarship 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 |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
English |
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. Copyright 2004 by the American Geophysical Union. |
format |
Article in Journal/Newspaper |
author |
Larour, E Rignot, E Aubry, D |
spellingShingle |
Larour, E Rignot, E Aubry, D Modelling of rift propagation on Ronne Ice Shelf, Antarctica, and sensitivity to climate change |
author_facet |
Larour, E Rignot, E Aubry, D |
author_sort |
Larour, E |
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 |
eScholarship, University of California |
publishDate |
2004 |
url |
http://www.escholarship.org/uc/item/95q1w4nt |
op_coverage |
L16404 1-4 |
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 |
Larour, E; Rignot, E; & Aubry, D. (2004). Modelling of rift propagation on Ronne Ice Shelf, Antarctica, and sensitivity to climate change. Geophysical Research Letters, 31(16), L16404 1-4. doi:10.1029/2004GL020077. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/95q1w4nt |
op_relation |
qt95q1w4nt http://www.escholarship.org/uc/item/95q1w4nt |
op_rights |
Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2004GL020077 |
container_title |
Geophysical Research Letters |
container_volume |
31 |
container_issue |
16 |
_version_ |
1766267259044495360 |