Elmer/Ice News

Elmer/Ice at IGS Chamonix 2014

IGS Chamonix 2014 sansCercle LawResElmer/Ice Talks and Posters at International Symposium on Glaciers and Ice Sheets Contribution to Sea-Level Change (Observations, Modelling and Prediction), to be held in Chamonix-Mont-Blanc, France, 26-30 May 2014. In total, 5 orals and 10 posters presenting some Elmer/Ice related results over the 220 presentations of the symposium. The whole program of the symposium can be obtained here.

Orals:

- Monday, 26 May, 16h54: Jean KRUG, Investigating the impact of melange on glacier dynamics
- Monday, 26 May, 17h12: Fabien GILLET-CHAULET, Could the non-linear creep behaviour observed at low stresses be associated with the yield stress of ice?
- Wednesday, 28 May, 10h48: Marianne HASELOFF, Modelling the dynamics of ice stream shear margins
- Thursday, 29 May, 14h00: Josefin AHLKRONA, The Fast Full Stokes Method (FFS) applied to the Greenland Ice Sheet
- Friday 30 May, 11h42: Martina SCHÄFER, Effect of elevation feedback in coupling a climatic mass-balance model to an ice-flow model: Vestfonna ice cap, Nordaustlandet/Svalbard

Poster Session A, Tuesday 15:30:

- Dorothée VALLOT, Seasonal evolution of basal friction coefficients in Kronebreen, Svalbard, using Elmer/Ice.
- Yongmei GONG, Sensitivity of Austfonna ice cap transient behavior to model physics and basal boundary conditions
- Ilona VÄLISUO, Simulations of the effect of mass-balance forcing on Midtre Lovénbreen, Svalbard, with a full-Stokes glacier model
- Thomas ZWINGER, Continuum and discrete models for calving and fracturing in glaciers

Poster Session B, Thursday 15:30:

- Jaime OTERO, Analysis of front position changes of a tidewater glacier and its control mechanisms
- Joe TODD, Flow and seasonal calving dynamics in a 2D model of Store Glacier, West Greenland
- Anne SOLGAARD, Inferring basal conditions at Engabreen from surface measurements
- Gwendolyn LEYSINGER VIELI, Investigating conditions for freeze-on at the ice sheet base and its effect on the ice sheet
- Sue COOK, The role of subaqueous melt in grounded ice: does it really enhance calving?
- Marion REVEILLET, Three-dimensional simulations of Glaciar Zongo (Bolivia, 16°S) over the next century, based on different IPCC scenarios

Environmental influences on the calving behaviour of Helheim

Cook and co-authors present a flow-line model of Helheim glacier that has been tuned using observations (velocity, temperature distribution) including Benn's calving criterion. The model was forced with different melting scenarios at its face, different surface melt distributions and - in a simplistic way – also ice mélange in front of the terminus. According to the findings with this model, it is rather the changing surface mass balance than the expected increase in ocean induced melting or the disappearing ice mélange that have the highest impact on accelerating the downwasting of a Greenlandic tide-water glacier such as Helheim.

The picture shows the difference in stress distributions and obtained crevasse depths with respect to the undisturbed ice front for different values of applied back-stress (representing the effect of ice mélange).

Cook, S., I.C. Rutt, T. Murray, A. Luckman, T. Zwinger, N. Selmes, A. Goldsack, and T.D. James, 2014: Modelling environmental influences on calving at Helheim Glacier in eastern Greenland, The Cryosphere, 8, 827-841, doi:10.5194/tc-8-827-2014 [link to paper]

Elmer/Ice at EGU 2014

Second Elmer/Ice users meeting

The second Elmer/Ice users meeting will take place  at EGU this year (Tue, 29 Apr 2014, 12:15–15:00 / Room Y3).

Elmer/Ice talks and Posters

Monday, 28 Apr
17:30–19:00 / Blue Posters, CR3.5, Glaciers and ice caps under climate change  
- EGU2014-15062 : Spatially distributed reconstruction of the surface mass balance of Pasterze glacier, Austria, employing a full Stokes model. Daniel Binder, Thomas Zwinger, Beate Hauser, Bernhard Hynek, Wolfgang Schöner, and Gernot Weyss

Tuesday, 29 Apr
17:30–19:00 / Blue Posters, CR3.1, Changing dynamics and environmental services of glacierized low latitude catchments
- EGU2014-6131, Simulations of Glaciar Zongo (Bolivia, 16°S) changes over the 21th century using the full-Stokes Elmer/Ice model, Marion Réveillet, Antoine Rabatel, Fabien Gillet-Chaulet, and Alavaro Soruco

Wednesday, 30 Apr
08:30–10:00 / Room Y11, CR1.4, Subglacial Environments of Ice Sheets and Glaciers   
- 09:15–09:30, EGU2014-9668, Basal conditions of the Rhine Glacier at the Last Glacial Maximum: insights from high-resolution transient numerical models, Denis Cohen, Fabien Gillet-Chaulet, Wilfried Haeberli, and Urs H. Fischer

10:30–12:30 / Room Y1, CR3.4, State of the Cryosphere: Observations and Modelling (including Arne Richter Award for Outstanding Young Scientists Lecture)   
- 10:45–11:00: EGU2014-7098, Retreat of Pine Island Glacier controlled by marine ice-sheet instability, Gael Durand, Lionel Favier, Stephen Cornford, Hilmar Gudmundsson, Olivier Gagliardini, Fabien Gillet-Chaulet, Thomas Zwinger, Anthony Payne, and Anne Le Brocq

Thursday, 1st May
08:30–12:00 / Room Y1, CR7.2, Modelling ice sheets and glaciers   
- 09:45–10:00, EGU2014-8597, Estimations of the age of the ice beneath Dome A, Antarctica, Thomas Zwinger, Bo Sun, Liyun Liyun, John C. Moore, Daniel Steinhage, and Carlos Martin

17:30–19:00 / Blue PostersPosters, CR7.2, Modelling ice sheets and glaciers   
- EGU2014-7095, Sensitivity of Austfonna icecap transient behavior to model physics and basal boundary conditions, Yongmei Gong, Rupert Gladstone, Stephen Cornford, Martina Schäfer, Thomas Zwinger, John Moore, Thorben Dunse, and Ruth Mottram   
- EGU2014-5247, Recession of Thwaites Glacier: inferring relevant processes using the ice sheet model Elmer/Ice, Nacho Merino, Gael Durand, Fabien Gillet-Chaulet, Noel Gourmelen, Andre Stumpf, Thomas Lampert, and Olivier Gagliardini   
-  EGU2014-5390, Initialising ice sheet model using nudging, Cyrille Mosbeux, Fabien Gillet-Chaulet, Gaël Durand, and Olivier Gagliardini

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