Results 1 to 10 of about 26,491 (132)
Firn Model Intercomparison Experiment (FirnMICE) [PDF]
Journal of Glaciology, 2017 ABSTRACT Evolution of cold dry snow and firn plays important roles in glaciology; however, the physical formulation of a densification law is still an active research topic. We forced eight firn-densification models and one seasonal-snow model in six different experiments by imposing step changes in temperature and accumulation-rate ...
Lundin, Jessica M.D. +12 more
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Gas diffusivity and permeability through the firn column at Summit, Greenland: measurements and comparison to microstructural properties [PDF]
The Cryosphere, 2014 The physical structure of polar firn plays a key role in the mechanisms by which glaciers and ice sheets preserve a natural archive of past atmospheric composition. This study presents the first measurements of gas diffusivity and permeability along with
A. C. Adolph, M. R. Albert
doaj +6 more sources
Geophysical Research LettersAbstract Snow dampens sounds, but anecdotal reports concisely describe audible propagating collapse events—firnquakes—in Antarctic and Arctic snowfields. We propose combining granular and continuum mechanics to form a testable theory for conditioning, triggering, and propagation of firnquakes consistent with scarce data.
A. Voigtländer, B. Gee
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The Community Firn Model (CFM) v1.0 [PDF]
Geoscientific Model Development, 2020 Models that simulate the evolution of polar firn are important for several applications in glaciology, including converting ice-sheet elevation change measurements to mass change and interpreting climate records in ice cores.
C. M. Stevens +8 more
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Numerical experiments on firn isotope diffusion with the Community Firn Model [PDF]
Journal of Glaciology, 2021 AbstractAdvances in analytical methods have made it possible to obtain high-resolution water isotopic data from ice cores. Their spectral signature contains information on the diffusion process that attenuated the isotopic signal during the firn densification process.
Vasileios Gkinis +5 more
openaire +3 more sources
Grain-size evolution controls the accumulation dependence of modelled firn thickness [PDF]
The Cryosphere, 2022 The net rate of snow accumulation b is predicted to increase over large areas of the Antarctic and Greenland ice sheets as the climate warms. Models disagree on how this will affect the thickness of the firn layer – the relatively low-density upper layer
J. Kingslake +3 more
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Greenland Ice Sheet Ice Slab Expansion and Thickening
Geophysical Research Letters, 2023 We use airborne accumulation radar data acquired over the Greenland Ice Sheet between 2002 and 2018 to identify changes in ice slab extent and thickness. We show that ice slabs several meters thick were already present at least as early as 2002.
N. Jullien +4 more
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Modeling enhanced firn densification due to strain softening [PDF]
The Cryosphere, 2022 In the accumulation zone of glaciers and ice sheets snow is transformed into glacial ice by firn densification. Classically, this process is assumed to solely depend on temperature and overburden pressure, which is controlled by the accumulation rate ...
F. M. Oraschewski +2 more
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Mapping Firn Saturation Over Greenland Using NASA’s Soil Moisture Active Passive Satellite
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022 Mapping the spatial extent of recently identified englacial hydrological features (i.e., ice slabs and perennial firn aquifers) formed by meters-thick water-saturated firn layers over the percolation facies of the Greenland Ice Sheet using L-band ...
Julie Z. Miller +5 more
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Abcc6 deficiency prevents rhabdomyolysis-induced acute kidney injury
Scientific Reports, 2023 Rhabdomyolysis is a risk factor for acute kidney injury, transition towards chronic kidney disease, and death. The role of calcium phosphate deposits in the mechanisms of rhabdomyolysis-induced acute kidney injury (RAKI) is still unclear.
Audrey Casemayou +11 more
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