Simulating the processes controlling ice-shelf rift paths using damage mechanics
Abstract Rifts are full-thickness fractures that propagate laterally across an ice shelf. They cause ice-shelf weakening and calving of tabular icebergs, and control the initial size of calved icebergs. Here, we present a joint inverse and forward computational modeling framework to capture rifting...
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Cambridge University Press (CUP)
2023
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Online Access: | http://dx.doi.org/10.1017/jog.2023.71 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143023000710 |
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crcambridgeupr:10.1017/jog.2023.71 2024-04-07T07:53:16+00:00 Simulating the processes controlling ice-shelf rift paths using damage mechanics Huth, Alex Duddu, Ravindra Smith, Benjamin Sergienko, Olga National Aeronautics and Space Administration National Science Foundation National Science Foundation 2023 http://dx.doi.org/10.1017/jog.2023.71 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143023000710 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Journal of Glaciology page 1-14 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 2023 crcambridgeupr https://doi.org/10.1017/jog.2023.71 2024-03-08T00:33:38Z Abstract Rifts are full-thickness fractures that propagate laterally across an ice shelf. They cause ice-shelf weakening and calving of tabular icebergs, and control the initial size of calved icebergs. Here, we present a joint inverse and forward computational modeling framework to capture rifting by combining the vertically integrated momentum balance and anisotropic continuum damage mechanics formulations. We incorporate rift–flank boundary processes to investigate how the rift path is influenced by the pressure on rift–flank walls from seawater, contact between flanks, and ice mélange that may also transmit stress between flanks. To illustrate the viability of the framework, we simulate the final 2 years of rift propagation associated with the calving of tabular iceberg A68 in 2017. We find that the rift path can change with varying ice mélange conditions and the extent of contact between rift flanks. Combinations of parameters associated with slower rift widening rates yield simulated rift paths that best match observations. Our modeling framework lays the foundation for robust simulation of rifting and tabular calving processes, which can enable future studies on ice-sheet–climate interactions, and the effects of ice-shelf buttressing on land ice flow. Article in Journal/Newspaper Ice Sheet Ice Shelf Journal of Glaciology Cambridge University Press Journal of Glaciology 1 14 |
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Open Polar |
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Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Huth, Alex Duddu, Ravindra Smith, Benjamin Sergienko, Olga Simulating the processes controlling ice-shelf rift paths using damage mechanics |
topic_facet |
Earth-Surface Processes |
description |
Abstract Rifts are full-thickness fractures that propagate laterally across an ice shelf. They cause ice-shelf weakening and calving of tabular icebergs, and control the initial size of calved icebergs. Here, we present a joint inverse and forward computational modeling framework to capture rifting by combining the vertically integrated momentum balance and anisotropic continuum damage mechanics formulations. We incorporate rift–flank boundary processes to investigate how the rift path is influenced by the pressure on rift–flank walls from seawater, contact between flanks, and ice mélange that may also transmit stress between flanks. To illustrate the viability of the framework, we simulate the final 2 years of rift propagation associated with the calving of tabular iceberg A68 in 2017. We find that the rift path can change with varying ice mélange conditions and the extent of contact between rift flanks. Combinations of parameters associated with slower rift widening rates yield simulated rift paths that best match observations. Our modeling framework lays the foundation for robust simulation of rifting and tabular calving processes, which can enable future studies on ice-sheet–climate interactions, and the effects of ice-shelf buttressing on land ice flow. |
author2 |
National Aeronautics and Space Administration National Science Foundation National Science Foundation |
format |
Article in Journal/Newspaper |
author |
Huth, Alex Duddu, Ravindra Smith, Benjamin Sergienko, Olga |
author_facet |
Huth, Alex Duddu, Ravindra Smith, Benjamin Sergienko, Olga |
author_sort |
Huth, Alex |
title |
Simulating the processes controlling ice-shelf rift paths using damage mechanics |
title_short |
Simulating the processes controlling ice-shelf rift paths using damage mechanics |
title_full |
Simulating the processes controlling ice-shelf rift paths using damage mechanics |
title_fullStr |
Simulating the processes controlling ice-shelf rift paths using damage mechanics |
title_full_unstemmed |
Simulating the processes controlling ice-shelf rift paths using damage mechanics |
title_sort |
simulating the processes controlling ice-shelf rift paths using damage mechanics |
publisher |
Cambridge University Press (CUP) |
publishDate |
2023 |
url |
http://dx.doi.org/10.1017/jog.2023.71 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143023000710 |
genre |
Ice Sheet Ice Shelf Journal of Glaciology |
genre_facet |
Ice Sheet Ice Shelf Journal of Glaciology |
op_source |
Journal of Glaciology page 1-14 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2023.71 |
container_title |
Journal of Glaciology |
container_start_page |
1 |
op_container_end_page |
14 |
_version_ |
1795668947224231936 |