Modelling L-band microwave brightness temperature time series for firn aquifers [PDF]
The CryosphereFirn aquifers are important in polar ice sheet hydrology and the associated mass and energy transport processes. Although the firn aquifer extent has been mapped using passive microwave satellite observations, models for predicting the L-band brightness ...
H. Xu +4 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
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Pore morphology of polar firn around closure revealed by X-ray tomography [PDF]
The Cryosphere, 2018 Understanding the slow densification process of polar firn into ice is essential in order to constrain the age difference between the ice matrix and entrapped gases.
A. Burr +7 more
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Annals of Glaciology, 2019 We compared elastic moduli in polar firn derived from diving wave refraction seismic velocity analysis, firn-core density measurements and microstructure modelling based on firn-core data.
Rebecca Schlegel +8 more
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Modelling the transition from grain-boundary sliding to power-law creep in dry snow densification
Journal of Glaciology, 2022 This paper presents a physics-based macroscale model for the densification of dry snow which provides for a smooth transition between densification by grain-boundary sliding (stage 1) and densification by power-law creep (stage 2).
Elizabeth M. Morris +2 more
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From atmospheric water isotopes measurement to firn core interpretation in Adélie Land: a case study for isotope-enabled atmospheric models in Antarctica [PDF]
The Cryosphere, 2023 In a context of global warming and sea level rise acceleration, it is key to estimate the evolution of the atmospheric hydrological cycle and temperature in polar regions, which directly influence the surface mass balance of the Arctic and Antarctic ice ...
C. Leroy-Dos Santos +11 more
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Transformation process observations of polar firn to ice [PDF]
Annals of Glaciology, 1993 The transformation of snow to ice under compressive stress is a very slow process unless meltwater is present. A qualitative measure of permeability variation with depth was continuously determined for various shallow-ice cores from the dry-snow zones in both Greenland and Antarctica to investigate this transformation process.
Langway, C.C. jr. +3 more
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Can the carbon isotopic composition of methane be reconstructed from multi-site firn air measurements? [PDF]
Atmospheric Chemistry and Physics, 2013 Methane is a strong greenhouse gas and large uncertainties exist concerning the future evolution of its atmospheric abundance. Analyzing methane atmospheric mixing and stable isotope ratios in air trapped in polar ice sheets helps in reconstructing the ...
C. J. Sapart +12 more
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Vertical profile of snow-firn density in the vicinity of Vostok station, Central Antarctica
Лëд и снег, 2023 The density of the snow and firn thickness is one of the fundamental and most important physical properties of the polar ice sheets. The data on density is used for reconstructing the past snow accumulation rate variability based on firn core studies ...
A. A. Ekaykin +5 more
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Trends of halon gases in polar firn air: implications for their emission distributions [PDF]
Atmospheric Chemistry and Physics, 2005 Four halons (H-1301, H-1211, H-2402 and H-1202) have been measured in air samples collected from polar firn from Dome Concordia (Dome C), Antarctica, from Devon Island, Canada and the North Greenland Ice Core Project (NGRIP) site, Greenland. H-2402 and H-
C. E. Reeves +8 more
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