Results 11 to 20 of about 5,175 (233)
Calving of large tabular icebergs from ice shelf rift systems [PDF]
Geophysical Research Letters, 2005 We used Interferometric Synthetic Aperture Radar to study the detachment process that allowed two large icebergs to calve from the Ross Ice Shelf, Antarctica. Time series of rift geometries indicate that rift widths increased steadily, whereas rift lengths increased episodically through several discrete rift‐tip propagation events.
Ian Joughin, Douglas R. MacAyeal
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A unifying framework for iceberg-calving models [PDF]
Journal of Glaciology, 2010 AbstractWe propose a general framework for iceberg-calving models that can be applied to any calving margin. The framework is based on mass continuity, the assumption that calving rate and terminus velocity are not independent and the simple idea that terminus thickness following a calving event is larger than terminus thickness at the event onset. The
J. M. Amundson, Martin Truffer
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Ocean tides trigger ice shelf rift growth and calving [PDF]
Nature CommunicationsTabular iceberg calving reduces ice-shelf extent, affecting ocean circulation and ice-sheet stability. Here we present detailed observations of a rift on the Brunt Ice Shelf, East Antarctica, from 2017-2023 and its behaviour in the lead up to calving in ...
O. J. Marsh, R. J. Arthern, J. De Rydt
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Evaluation of Iceberg Calving Models Against Observations From Greenland Outlet Glaciers [PDF]
Journal of Geophysical Research: Earth Surface, 2020 AbstractFrontal ablation processes at marine‐terminating glaciers are challenging to observe and difficult to represent in numerical ice flow models, yet play critical roles in modulating ice sheet mass balance. Current ice sheet models typically rely on simple iceberg calving models to prescribe either terminus positions or iceberg calving rates, but ...
Tristan Amaral +2 more
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Thinning sea ice weakens buttressing force of iceberg mélange and promotes calving [PDF]
Nature Communications, 2017 Observed sea-ice loss near ice sheets has, in many cases, been accompanied by accelerated iceberg calving. Here, using a new model, the authors show that iceberg calving from glaciers can be suppressed by a mélange of sea ice and icebergs, with an ...
Alexander A. Robel
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Ocean-driven thinning enhances iceberg calving and retreat of Antarctic ice shelves. [PDF]
Proc Natl Acad Sci U S A, 2015 SignificanceThe floating parts of the Antarctic ice sheet (“ice shelves”) help to hold back the flow of the grounded parts, determining the contribution to global sea level rise. Using satellite images, we measured, for the first time, all icebergs larger than 1 km2calving from the entire Antarctic coastline, and the state of health of all the ice ...
Liu Y +7 more
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Do atmospheric rivers trigger tabular iceberg calving?
Journal of GlaciologyThe processes governing iceberg calving from ice shelves remain poorly understood. Recent studies suggest that anomalous atmospheric moisture transport events – atmospheric rivers – can act as triggers for calving.
Tristan Scott Rendfrey +2 more
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Iceberg calving from the Amery Ice Shelf, East Antarctica [PDF]
Annals of Glaciology, 2002 AbstractWe investigate the iceberg-calving cycle of the Amery Ice Shelf (AIS), East Antarctica, using evidence acquired between 1936 and 2000. The most recent major iceberg-calving event occurred between late 1963 and early 1964, when a large berg totalling about 10 000 km2 in area broke from the ice front.
H. A. Fricker +3 more
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Brief communication: Rapid acceleration of the Brunt Ice Shelf after calving of iceberg A-81 [PDF]
The CryosphereThe Brunt Ice Shelf, Antarctica, accelerated rapidly from a velocity of 900 to 1500 m a−1 during 6 months, following calving of a 1500 km2 iceberg on 22 January 2023.
O. J. Marsh +2 more
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Melt-under-cutting and buoyancy-driven calving from tidewater glaciers: new insights from discrete element and continuum model simulations [PDF]
Journal of Glaciology, 2017 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.
DOUGLAS I. BENN +7 more
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