Ocean-driven thinning enhances iceberg calving and retreat of Antarctic ice shelves [PDF]
Proceedings of the National Academy of Sciences of the United States of America, 2015 Iceberg calving from all Antarctic ice shelves has never been directly measured, despite playing a crucial role in ice sheet mass balance. Rapid changes to iceberg calving naturally arise from the sporadic detachment of large tabular bergs but can also ...
John C Moore +2 more
exaly +4 more sources
Two Calving Laws for Grounded Iceberg-Calving Glaciers (Abstract only) [PDF]
Annals of Glaciology, 1983 Prediction of the future retreat of Columbia Glacier, Alaska, required a calving law for the boundary condition at the terminus. Qualitative observations on the variations of all major iceberg-calving glaciers of Alaska suggest that calving is high whenever glaciers terminate in deep water, and greatly reduced whenever they ...
C. S. Brown +4 more
core +3 more sources
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
Amundson, Jason M., Truffer, Martin
openaire +3 more sources
Fragmentation theory reveals processes controlling iceberg size distributions
Journal of Glaciology, 2021 Iceberg calving strongly controls glacier mass loss, but the fracture processes leading to iceberg formation are poorly understood due to the stochastic nature of calving.
Jan Åström +5 more
doaj +5 more sources
Buoyant forces promote tidewater glacier iceberg calving through large basal stress concentrations [PDF]
The Cryosphere, 2019 Iceberg calving parameterisations currently implemented in ice sheet models do not reproduce the full observed range of calving behaviours. For example, though buoyant forces at the ice front are known to trigger full-depth calving events on major ...
M. Trevers +4 more
doaj +6 more sources
The statistical physics of iceberg calving and the emergence of universal calving laws [PDF]
Journal of Glaciology, 2011 AbstractDetermining a calving law valid for all glaciological and environmental regimes has proven to be a difficult problem in glaciology. For this reason, most models of the calving process are semi-empirical, with little connection to the underlying fracture processes.
J.N. Bassis
openaire +2 more sources
Ice shelf calving due to shear stresses: observing the response of Brunt Ice Shelf and Halloween Crack to iceberg calving using ICESat-2 laser altimetry, satellite imagery, and ice flow models [PDF]
The CryosphereFull-thickness ice shelf fractures, known as rifts, create tabular icebergs that can reduce ice shelf extent and thereby jeopardize overall marine ice sheet stability.
A. Morris +3 more
doaj +3 more sources
Thinning sea ice weakens buttressing force of iceberg mélange and promotes calving
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
doaj +2 more sources
An Estimate of the Flux of Iceberg Calving from Greenland
Arctic, Antarctic, and Alpine Research, 1999 Using several relationships between calving velocity and physical parameters at the glacier's entry to the ocean, estimates are made of the iceberg flux from the Greenland ice sheet. The flux from each major glacier is estimated, leading to total iceberg fluxes of 170-270 Tkg yr-~.
Grant R Bigg
exaly +2 more sources
IceLines – A new data set of Antarctic ice shelf front positions [PDF]
Scientific Data, 2023 The frontal position of an ice shelf is an important parameter for ice dynamic modelling, the computation of mass fluxes, mapping glacier area change, calculating iceberg production rates and the estimation of ice discharge to the ocean.
Celia A. Baumhoer +3 more
doaj +2 more sources