Projects per year
Abstract / Description of output
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.
Original language | English |
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Pages (from-to) | 2119-2134 |
Journal | The Cryosphere (TC) |
Volume | 8 |
DOIs | |
Publication status | Published - 2014 |
Keywords / Materials (for Non-textual outputs)
- Antarctica
- Ice sheet modelling
- Weddell Sea
- Filchner Ronne Ice Shelf
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Dive into the research topics of 'Sensitivity of the Weddell Sea sector ice streams to sub-shelf melting and surface accumulation'. Together they form a unique fingerprint.Projects
- 2 Finished
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Airborne geophysical investigation targets basal boundary conditions for the Institute and Moeller Ice Streams, West Antarctica
1/04/10 → 31/07/14
Project: Project from a former institution
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Airborne Geophysical Investigations targets basal boundary conditions for the institute mollar ice streams, west antartica
Siegert, M.
1/04/10 → 31/08/13
Project: Research