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...
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Copernicus Publications on behalf of the European Geosciences Union
2014
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ftnerc:oai:nora.nerc.ac.uk:502707 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. 2014-11-24 text http://nora.nerc.ac.uk/id/eprint/502707/ https://nora.nerc.ac.uk/id/eprint/502707/1/tc-8-2119-2014.pdf en eng Copernicus Publications on behalf of the European Geosciences Union https://nora.nerc.ac.uk/id/eprint/502707/1/tc-8-2119-2014.pdf Wright, A.P.; Le Brocq, A.M.; Cornford, S.L.; Bingham, R.G.; Corr, H.F.J.; Ferraccioli, F. orcid:0000-0002-9347-4736 Jordan, T.A. orcid:0000-0003-2780-1986 Payne, A.J.; Rippin, D.M.; Ross, N.; Siegert, M.J. 2014 Sensitivity of the Weddell Sea sector ice streams to sub-shelf melting and surface accumulation. The Cryosphere, 8. 2119-2134. https://doi.org/10.5194/tcd-7-5475-2013 <https://doi.org/10.5194/tcd-7-5475-2013> cc_by CC-BY Publication - Article PeerReviewed 2014 ftnerc https://doi.org/10.5194/tcd-7-5475-2013 2023-02-04T19:37:25Z 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 Natural Environment Research Council: NERC Open Research Archive 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) |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
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. |
spellingShingle |
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 |
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 on behalf of the European Geosciences Union |
publishDate |
2014 |
url |
http://nora.nerc.ac.uk/id/eprint/502707/ https://nora.nerc.ac.uk/id/eprint/502707/1/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 |
https://nora.nerc.ac.uk/id/eprint/502707/1/tc-8-2119-2014.pdf Wright, A.P.; Le Brocq, A.M.; Cornford, S.L.; Bingham, R.G.; Corr, H.F.J.; Ferraccioli, F. orcid:0000-0002-9347-4736 Jordan, T.A. orcid:0000-0003-2780-1986 Payne, A.J.; Rippin, D.M.; Ross, N.; Siegert, M.J. 2014 Sensitivity of the Weddell Sea sector ice streams to sub-shelf melting and surface accumulation. The Cryosphere, 8. 2119-2134. https://doi.org/10.5194/tcd-7-5475-2013 <https://doi.org/10.5194/tcd-7-5475-2013> |
op_rights |
cc_by |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/tcd-7-5475-2013 |
_version_ |
1766404897651032064 |