globalchange  > 影响、适应和脆弱性
DOI: 10.5194/tc-8-2119-2014
Scopus记录号: 2-s2.0-84913588770
论文题名:
Sensitivity of the Weddell Sea sector ice streams to sub-shelf melting and surface accumulation
作者: 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
刊名: Cryosphere
ISSN: 19940416
出版年: 2014
卷: 8, 期:6
起始页码: 2119
结束页码: 2134
语种: 英语
英文关键词: deep sea ; ice sheet ; ice shelf ; mass balance ; melting ; numerical model ; sea ice ; sea level change ; sensitivity analysis ; topography ; velocity ; Antarctica ; Evans Ice Stream ; Southern Ocean ; Weddell Sea ; West Antarctica
英文摘要: 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. © 2014 Author(s).
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/74764
Appears in Collections:影响、适应和脆弱性
气候变化与战略

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作者单位: Dept. of Geography, College of Life and Environmental Sciences, University of Exeter, Exeter, United Kingdom; Bristol Glaciology Centre, School of Geographical Sciences, University of Bristol, Bristol, United Kingdom; School of Geosciences, University of Edinburgh, Edinburgh, United Kingdom; British Antarctic Survey, Madingley Road, Cambridge, United Kingdom; Environment Department, University of York, Heslington York, United Kingdom; School of Geography, Politics and Sociology, Newcastle University, Newcastle Upon Tyne, United Kingdom; Grantham Institute, Department of Earth Science and Engineering, Imperial College London, London, United Kingdom

Recommended Citation:
Wright A,P,, Le Brocq A,et al. Sensitivity of the Weddell Sea sector ice streams to sub-shelf melting and surface accumulation[J]. Cryosphere,2014-01-01,8(6)
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