Elmer/Ice News

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Evolution of Derwael Ice Rise in Dronning Maud Land, Antarctica

Written by Olivier Gagliardini on .

FigOlivier2

This paper investigates the evolution of Derwael Ice Rise in Antarctica, by comparing the internal radar stratigraphy with model output from Elmer/Ice. Ice rises are situated within ice shelves and have a spatially confined flow regime with local ice divides. Beneath the divides, the ice stratigraphy often develops arches (a.k.a Raymond Bumps) with amplitudes that record the divide's horizontal residence time and surface elevation changes. By comparing the arch amplitudes with different model scenarios this study shows that Derwael Ice Rise has maintained its local flow regime for at least 5000 years. This delivers and important tie-point to better understand the ill-constrained deglaciation history in this sector of Antarctica. The combination of geophysical data and modelling also emphasizes that the surface mass balance and ice rheology need to be well-constrained for a reliable interpretation of the Raymond arches.


Reference: Drews, R, K. Matsuoka, C. Martín, D. Callens, N. Bergeot and F. Pattyn, 2015. Evolution of Derwael Ice Rise in Dronning Maud Land, Antarctica, over the last millennia, Journal of Geophys. Res. Earth Surf., DOI: 10.1002/2014JF003246

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Intensive workshop on sliding

Written by Olivier Gagliardini on .

koli2015Thomas Zwinger and Olivier Gagliardini are currently having an intensive workshop on sliding somewhere in Finland (the exact location is keep secret). One can be sure that great progress regarding sliding in Elmer/Ice will be make by the end of this week.

 

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Elmer/Ice at AGU 2014

Written by Olivier Gagliardini on .

aguDon't miss the 8 presentations using Elmer/Ice at the next AGU!

C44B-02 First-principles Simulations and the Criticality of Calving Glaciers
Thursday, December 18, 2014, 04:15 PM - 04:30 PM , Moscone West-3007

C44B-03 Melt Undercutting and Calving from Tidewater Glaciers: Observations and Model Results
Thursday, December 18, 2014, 04:30 PM - 04:45 PM , Moscone West-3007

C23C-0416 Interpreting Terminus Fluctuations at Helheim Glacier, Southeast Greenland, through Modeling and Observations
Tuesday, December 16, 2014, 01:40 PM - 06:00 PM , Moscone West-Poster Hall

C23C-0417 Modeling Ocean-Forced Changes in Smith Glacier
Tuesday, December 16, 2014, 01:40 PM - 06:00 PM , Moscone West-Poster Hall

C33A-0351 Retroactions Between Basal Hydrology and Basal Sliding from Numerical Experiments
Wednesday, December 17, 2014, 01:40 PM - 06:00 PM , Moscone West-Poster Hall

C33A-0360 Inferring basal stress under Greenland's big three outlet glaciers
Wednesday, December 17, 2014, 01:40 PM - 06:00 PM , Moscone West-Poster Hall

C33A-0363 Comparison of Full Stokes and Shallow Shelf equations regarding grounding line dynamics on a variety of synthetic geometry representative of Antarctic outlet glaciers.
Wednesday, December 17, 2014, 01:40 PM - 06:00 PM , Moscone West-Poster Hall

C33A-0374 Investigating the Geometry and Conditions for Basal Accretion of Englacial Plumes
Wednesday, December 17, 2014, 01:40 PM - 06:00 PM , Moscone West-Poster Hall

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