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Melt-under-cutting and buoyancy-driven calving from tidewater glaciers : new insights from discrete element and continuum model simulations
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dc.contributor.author | Benn, Douglas I. | |
dc.contributor.author | Åström, Jan | |
dc.contributor.author | Zwinger, Thomas | |
dc.contributor.author | Todd, Joe | |
dc.contributor.author | Nick, Faezeh M. | |
dc.contributor.author | Cook, Susan | |
dc.contributor.author | Hulton, Nicholas R. J. | |
dc.contributor.author | Luckman, Adrian | |
dc.date.accessioned | 2017-07-26T10:30:09Z | |
dc.date.available | 2017-07-26T10:30:09Z | |
dc.date.issued | 2017-08 | |
dc.identifier | 250207323 | |
dc.identifier | 75c69565-47e1-4d9f-96ed-6fdeeadb2b10 | |
dc.identifier | 85028622381 | |
dc.identifier | 000415869500012 | |
dc.identifier.citation | Benn , D I , Åström , J , Zwinger , T , Todd , J , Nick , F M , Cook , S , Hulton , N R J & Luckman , A 2017 , ' Melt-under-cutting and buoyancy-driven calving from tidewater glaciers : new insights from discrete element and continuum model simulations ' , Journal of Glaciology , vol. 63 , no. 240 , pp. 691-702 . https://doi.org/10.1017/jog.2017.41 | en |
dc.identifier.issn | 0022-1430 | |
dc.identifier.other | ORCID: /0000-0002-3604-0886/work/64697362 | |
dc.identifier.other | ORCID: /0000-0003-3183-043X/work/65014582 | |
dc.identifier.uri | https://hdl.handle.net/10023/11286 | |
dc.description | This work was funded by the ConocoPhillips Northern Area Program (CRIOS: Calving Rates and Impact on Sea Level) and the Nordic Research Council (SVALI: Stability and Variation of Arctic Land Ice and eSTICC: eScience Tools for Investigating Climate Change in northern high latitudes). | en |
dc.description.abstract | The simple calving laws currently used in ice sheet models do not adequately reflect the complexity and diversity of calving processes. To be effective, calving laws must be grounded in a sound understanding of how calving actually works. Here, we develop a new strategy for formulating calving laws, using a) the Helsinki Discrete Element Model (HiDEM) to explicitly model fracture and calving processes, and b) the continuum model Elmer/Ice to identify critical stress states associated with HiDEM calving events. A range of observed calving processes emerges spontaneously from HiDEM in response to variations in ice-front buoyancy and the size of subaqueous undercuts. Calving driven by buoyancy and melt undercutting is under-predicted by existing calving laws, but we show that the location and magnitude of HiDEM calving events can be predicted in Elmer/Ice from characteristic stress patterns. Our results open the way to developing calving laws that properly reflect the diversity of calving processes, and provide a framework for a unified theory of the calving process continuum. | |
dc.format.extent | 12 | |
dc.format.extent | 827484 | |
dc.language.iso | eng | |
dc.relation.ispartof | Journal of Glaciology | en |
dc.subject | Calving | en |
dc.subject | Glacier modelling | en |
dc.subject | Iceberg calving | en |
dc.subject | GE Environmental Sciences | en |
dc.subject | NDAS | en |
dc.subject | BDC | en |
dc.subject | R2C | en |
dc.subject.lcc | GE | en |
dc.title | Melt-under-cutting and buoyancy-driven calving from tidewater glaciers : new insights from discrete element and continuum model simulations | en |
dc.type | Journal article | en |
dc.contributor.institution | University of St Andrews. School of Geography & Sustainable Development | en |
dc.contributor.institution | University of St Andrews. Bell-Edwards Geographic Data Institute | en |
dc.identifier.doi | 10.1017/jog.2017.41 | |
dc.description.status | Peer reviewed | en |
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