Article-Journal

A new model of dry firn-densification constrained by continuous strain measurements near South Pole
Converting measurements of ice-sheet surface elevation change to mass change requires measurements of accumulation and knowledge of the …
C. Max Stevens, Admin, Howard Conway, T.J. Fudge, Michelle Koutnik, Catherine Ritz, Edwin D. Waddington
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Simulating higher-order fabric structure in a coupled, anisotropic ice-flow model: application to Dome C
Ice-crystal fabric can induce mechanical anisotropy that significantly affects flow, but ice-flow models generally do not include …
Admin, Nicholas M. Rathmann, Christine S. Hvidberg, Aslak Grinsted, M. Reza Ershadi, Reinhard Drews, Dorthe Dahl-Jensen
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Stagnant ice and age modelling in the Dome C region, Antarctica
The European Beyond EPICA project aims to extract a continuous ice core of up to 1.5 Ma, with a maximum age density of 20 kyr m−1 at …
Ailsa Chung, Frédéric Parrenin, Bert Rudels, Daniel Steinhage, Robert Mulvaney, David G. Babb, Carlos Martín, Marie G.P. Cavitte, Admin, Veit Helm, Drew Taylor, Prasad Gogineni, Catherine Ritz, Massimo Frezzottie, Charles O'Neill, Heinrich Miller, Dorthe Dahl-Jensen, Olaf Eisen
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Modification of Pacific water in the northern Canadian Arctic
The oceanography of the northern Canadian Arctic Archipelago (CAA) remains poorly studied. Here we present a unique set of …
Igor A. Dmitrenko, Sergei A. Kirillov, Bert Rudels, Nicholas-Xavier Geilfus, Jens Ehn, David G. Babb, Admin, Dorthe Dahl-Jensen
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Crystal fabric anisotropy causes directional hardening of the Northeast Greenland Ice Stream
The dynamic mass loss of ice sheets due to ice flow constitutes one of the biggest uncertainties in projections of ice-sheet evolution …
Tamara A. Gerber, Admin, Nicholas M. Rathmann, Steven Franke, Tun Jan Young, Fernando Valero-Delgado, Reza Ershadi, Reinhard Drews, Ole Zeising, Angelika Humbert, Nicolas Stoll, Ilka Weikusat, Aslak Grinsted, Christine S. Hvidberg, Daniela Jansen, Heinrich Miller, Veit Helm, Daniel Steinhage, Charles O'Neill, Prasad Gogineni, John Paden, Dorthe Dahl-Jensen, Olaf Eisen
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Accelerating ice flow at the onset of the Northeast Greenland Ice Stream
Mass loss near the ice-sheet margin is evident from remote sensing as frontal retreat and increases in ice velocities. Velocities in …
Aslak Grinsted, Christine S. Hvidberg, Admin, Nicholas M. Rathmann, Nanna B. Karlsson, Tamara A. Gerber, Helle A. Kjær, Paul Vallelonga, Dorthe Dahl-Jensen
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On the nonlinear viscosity of the orthotropic bulk rheology
We compare different ways the bulk flow nonlinearity of glacier ice can be captured in an orthotropic rheology. Specifically, we …
Nicholas M. Rathmann, Admin
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On the Limitations of Using Polarimetric Radar Sounding to Infer the Crystal Orientation Fabric of Ice Masses
We introduce a transfer matrix model for radio-wave propagation through layered anisotropic ice that permits an arbitrary dielectric …
Nicholas M. Rathmann, Admin, Aslak Grinsted, Tamara A. Gerber, Tun Jan Young, Dorthe Dahl-Jensen
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Inferred basal friction and mass flux affected by crystal-orientation fabrics
We investigate the errors caused by neglecting the crystal-orientation fabric when inferring the basal friction coefficient field, and …
Nicholas M. Rathmann, Admin
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Modeling Ice-Crystal Fabric as a Proxy for Ice-Stream Stability
The crystal structure within an ice sheet evolves in response to deformation; hence ice- crystal fabric records ice-flow history. …
Admin, Nicholas M. Rathmann, Christine S. Hvidberg, Dorthe Dahl-Jensen
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