Sensitivity of the Weddell Sea sector ice streams to sub-shelf melting and surface accumulation
A recent ocean modelling study indicates that possible changes in circulation may bring warm deep-ocean water into direct contact with the grounding lines of the Filchner–Ronne ice streams, suggesting the potential for future ice losses from this sector equivalent to ~0.3 m of sea-level rise. Signif...
Published in: | The Cryosphere |
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Language: | English |
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Copernicus Publications
2014
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00018386 2023-05-15T16:08:52+02:00 Sensitivity of the Weddell Sea sector ice streams to sub-shelf melting and surface accumulation Wright, A. P. Le Brocq, A. M. Cornford, S. L. Bingham, R. G. Corr, H. F. J. Ferraccioli, F. Jordan, T. A. Payne, A. J. Rippin, D. M. Ross, N. Siegert, M. J. 2014-11 electronic https://doi.org/10.5194/tc-8-2119-2014 https://noa.gwlb.de/receive/cop_mods_00018386 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00018341/tc-8-2119-2014.pdf https://tc.copernicus.org/articles/8/2119/2014/tc-8-2119-2014.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-8-2119-2014 https://noa.gwlb.de/receive/cop_mods_00018386 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00018341/tc-8-2119-2014.pdf https://tc.copernicus.org/articles/8/2119/2014/tc-8-2119-2014.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2014 ftnonlinearchiv https://doi.org/10.5194/tc-8-2119-2014 2022-02-08T22:53:14Z A recent ocean modelling study indicates that possible changes in circulation may bring warm deep-ocean water into direct contact with the grounding lines of the Filchner–Ronne ice streams, suggesting the potential for future ice losses from this sector equivalent to ~0.3 m of sea-level rise. Significant advancements have been made in our knowledge of both the basal topography and ice velocity in the Weddell Sea sector, and the ability to accurately model marine ice sheet dynamics, thus enabling an assessment to be made of the relative sensitivities of the diverse collection of ice streams feeding the Filchner–Ronne Ice Shelf. Here we use the BISICLES ice sheet model, which employs adaptive-mesh refinement to resolve grounding line dynamics, to carry out such an assessment. The impact of realistic perturbations to the surface and sub-shelf mass balance forcing fields from our 2000-year "reference" model run indicate that both the Institute and Möller ice streams are highly sensitive to changes in basal melting either near to their respective grounding lines, or in the region of the ice rises within the Filchner–Ronne Ice Shelf. These same perturbations have little impact, however, on the Rutford, Carlson or Foundation ice streams, while the Evans Ice Stream is found to enter a phase of unstable retreat only after melt at its grounding line has increased by 50% of likely present-day values. Article in Journal/Newspaper Evans Ice Stream Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Sheet Ice Shelf Ronne Ice Shelf The Cryosphere Weddell Sea Niedersächsisches Online-Archiv NOA Weddell Sea Weddell Ronne Ice Shelf ENVELOPE(-61.000,-61.000,-78.500,-78.500) Rutford ENVELOPE(-85.300,-85.300,-78.600,-78.600) Evans Ice Stream ENVELOPE(-78.000,-78.000,-76.000,-76.000) The Cryosphere 8 6 2119 2134 |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Wright, A. P. Le Brocq, A. M. Cornford, S. L. Bingham, R. G. Corr, H. F. J. Ferraccioli, F. Jordan, T. A. Payne, A. J. Rippin, D. M. Ross, N. Siegert, M. J. Sensitivity of the Weddell Sea sector ice streams to sub-shelf melting and surface accumulation |
topic_facet |
article Verlagsveröffentlichung |
description |
A recent ocean modelling study indicates that possible changes in circulation may bring warm deep-ocean water into direct contact with the grounding lines of the Filchner–Ronne ice streams, suggesting the potential for future ice losses from this sector equivalent to ~0.3 m of sea-level rise. Significant advancements have been made in our knowledge of both the basal topography and ice velocity in the Weddell Sea sector, and the ability to accurately model marine ice sheet dynamics, thus enabling an assessment to be made of the relative sensitivities of the diverse collection of ice streams feeding the Filchner–Ronne Ice Shelf. Here we use the BISICLES ice sheet model, which employs adaptive-mesh refinement to resolve grounding line dynamics, to carry out such an assessment. The impact of realistic perturbations to the surface and sub-shelf mass balance forcing fields from our 2000-year "reference" model run indicate that both the Institute and Möller ice streams are highly sensitive to changes in basal melting either near to their respective grounding lines, or in the region of the ice rises within the Filchner–Ronne Ice Shelf. These same perturbations have little impact, however, on the Rutford, Carlson or Foundation ice streams, while the Evans Ice Stream is found to enter a phase of unstable retreat only after melt at its grounding line has increased by 50% of likely present-day values. |
format |
Article in Journal/Newspaper |
author |
Wright, A. P. Le Brocq, A. M. Cornford, S. L. Bingham, R. G. Corr, H. F. J. Ferraccioli, F. Jordan, T. A. Payne, A. J. Rippin, D. M. Ross, N. Siegert, M. J. |
author_facet |
Wright, A. P. Le Brocq, A. M. Cornford, S. L. Bingham, R. G. Corr, H. F. J. Ferraccioli, F. Jordan, T. A. Payne, A. J. Rippin, D. M. Ross, N. Siegert, M. J. |
author_sort |
Wright, A. P. |
title |
Sensitivity of the Weddell Sea sector ice streams to sub-shelf melting and surface accumulation |
title_short |
Sensitivity of the Weddell Sea sector ice streams to sub-shelf melting and surface accumulation |
title_full |
Sensitivity of the Weddell Sea sector ice streams to sub-shelf melting and surface accumulation |
title_fullStr |
Sensitivity of the Weddell Sea sector ice streams to sub-shelf melting and surface accumulation |
title_full_unstemmed |
Sensitivity of the Weddell Sea sector ice streams to sub-shelf melting and surface accumulation |
title_sort |
sensitivity of the weddell sea sector ice streams to sub-shelf melting and surface accumulation |
publisher |
Copernicus Publications |
publishDate |
2014 |
url |
https://doi.org/10.5194/tc-8-2119-2014 https://noa.gwlb.de/receive/cop_mods_00018386 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00018341/tc-8-2119-2014.pdf https://tc.copernicus.org/articles/8/2119/2014/tc-8-2119-2014.pdf |
long_lat |
ENVELOPE(-61.000,-61.000,-78.500,-78.500) ENVELOPE(-85.300,-85.300,-78.600,-78.600) ENVELOPE(-78.000,-78.000,-76.000,-76.000) |
geographic |
Weddell Sea Weddell Ronne Ice Shelf Rutford Evans Ice Stream |
geographic_facet |
Weddell Sea Weddell Ronne Ice Shelf Rutford Evans Ice Stream |
genre |
Evans Ice Stream Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Sheet Ice Shelf Ronne Ice Shelf The Cryosphere Weddell Sea |
genre_facet |
Evans Ice Stream Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Sheet Ice Shelf Ronne Ice Shelf The Cryosphere Weddell Sea |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-8-2119-2014 https://noa.gwlb.de/receive/cop_mods_00018386 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00018341/tc-8-2119-2014.pdf https://tc.copernicus.org/articles/8/2119/2014/tc-8-2119-2014.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-8-2119-2014 |
container_title |
The Cryosphere |
container_volume |
8 |
container_issue |
6 |
container_start_page |
2119 |
op_container_end_page |
2134 |
_version_ |
1766404898308489216 |