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The calving constraints on inception of Quaternary ice sheets
Quaternary International, 2002Abstract Most numerical models that simulate the inception of Quaternary ice sheets nucleate the ice sheets in high-latitude highlands of the Northern Hemisphere. These nuclei are initially plateau or island ice caps that then expand and merge with one another to become an ice sheet. Before merger, however, these ice caps often must cross continental
James P. Kenneally, Terence J. Hughes
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Ice-Age Simulations with a Calving Ice-Sheet Model
Quaternary Research, 1983AbstractVariations of ice-sheet volume during the Quaternary ice ages are simulated using a simple ice-sheet model for the Northern Hemisphere. The basic model predicts ice thickness and bedrock deformation in a north-south cross section, with a prescribed snow-budget distribution shifted uniformly in space to represent the orbital perturbations.
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Modelling the propagation of crevasses and calving in ice shelves
2023Ice shelves are floating extensions of glaciers and ice sheets that terminate in the ocean, and their stability and mass balance play a crucial role in controlling the sea level. One of the major processes affecting their stability is the calving of icebergs, which is a complex and poorly understood phenomenon.
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Modelling calving at Kronebreen, Svalbard using Elmer/Ice
2021<p>Understanding how tidewater glaciers are responding to climatic and oceanographic changes is vital in order to reduce uncertainty in sea level rise estimates. In this project, we are using the 3D calving model in Elmer/Ice to simulate how Kronebreen responds over short time scales to various forcing scenarios.
Felicity Holmes +2 more
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Some Ice-Age Aspects of a Calving Ice-Sheet Model
1984Further results and extensions of a simple northern hemispheric ice-sheet model are described for the Quaternary ice ages. The model predicts ice thickness and bedrock deformation in a north-south cross section, with a prescribed snow-budget distribution shifted vertically to represent the orbital pertur-bations.
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The source and calving of ice island ARLIS-II
Polar Record, 1992AbstractOn the basis of existing data on the dimensions, shape, surficial geology, and glaciological structure of ice island ARLIS-II, used in combination with aerial photographs of northernmost Ellesmere Island taken in 1950 and 1959, the source of the ice island is positively identified as the Alfred Ernest Ice Shelf. The duration of the recent drift
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Equipping an ice-flow model with calving and ice-front migration
Global sea-level rise is significantly influenced by glacier melting and retreat palpable all around the world. Of particular interest are marine- and lake-terminating (MALT) glaciers, which, despite their small number, store a substantial portion of the global glacier ice volume. One key component of the glacier mass budget in MALT glaciers is frontalVeena Prasad +6 more
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Impacts of the Larsen-C Ice Shelf calving event
Nature Climate Change, 2017A giant iceberg has calved off the Larsen-C Ice Shelf, the largest remaining ice shelf on the Antarctic Peninsula, reducing its total area by ~10%. Whilst calving events are a natural phenomenon and thus not necessarily indicative of changing environmental conditions, such events can impact ice-shelf stability.
Hogg, Anna E., Gudmundsson, G. Hilmar
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On the recent calving of icebergs from the Ross ice shelf
Polar Geography, 2008Abstract The year 2000 has witnessed the calving of several remarkably large icebergs in the Ross and Weddell seas of Antarctica, including the calving of B-l 5, possibly the largest iceberg yet to be observed. Here we present satellite imagery that records the calving, and precursor events leading up to the detachment of B-l 5 from the Ross Ice Shelf ...
M. A. Lazzara +4 more
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A viscoelastic phase-field model for calving and fracture in ice
Iceberg calving due to fracture accounts for around half of the ice lost annually from Antarctica, but physically based models representing this process are not currently included in ice sheet models. By using a phase-field viscoelastic model for fracture we can model both slow deformation of ice and the distribution and evolution of cracks leading to ...Daniel Richards +3 more
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