气候变化领域集成服务门户(CCPortal): Sensitivity of the Weddell Sea sector ice streams to sub-shelf melting and surface accumulation

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DOI	10.5194/tc-8-2119-2014
	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.
发表日期	2014
ISSN	19940416
卷号	8 期号:6
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).
学科领域	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
语种	英语
scopus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
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120009
作者单位	Dept. of Geography, College of Life and Environmental Sciences, University of Exeter, Exeter, EX4 4RJ, United Kingdom; Bristol Glaciology Centre, School of Geographical Sciences, University of Bristol, Bristol, BS8 1SS, United Kingdom; School of Geosciences, University of Edinburgh, Edinburgh, EH8 9XP, United Kingdom; British Antarctic Survey, Madingley Road, Cambridge, CB3 0ET, United Kingdom; Environment Department, University of York, Heslington York, YO10 5DD, United Kingdom; School of Geography, Politics and Sociology, Newcastle University, Newcastle Upon Tyne, NE1 7RU, United Kingdom; Grantham Institute, Department of Earth Science and Engineering, Imperial College London, London, SW7 2AZ, United Kingdom
推荐引用方式 GB/T 7714	Wright A.P.,Le Brocq A.M.,Cornford S.L.,et al. Sensitivity of the Weddell Sea sector ice streams to sub-shelf melting and surface accumulation[J],2014,8(6).
APA	Wright A.P..,Le Brocq A.M..,Cornford S.L..,Bingham R.G..,Corr H.F.J..,...&Siegert M.J..(2014).Sensitivity of the Weddell Sea sector ice streams to sub-shelf melting and surface accumulation.Cryosphere,8(6).
MLA	Wright A.P.,et al."Sensitivity of the Weddell Sea sector ice streams to sub-shelf melting and surface accumulation".Cryosphere 8.6(2014).