Elmer/Ice News

Carlo Licciulli is awarded the 2020 Graham Cogley Award

Carlo Licciulli from the University of Heidelberg (Germany) is is awarded the 2020 Graham Cogley Award for his best stduent-authored paper:
Licciulli C, P. Bohleber, J. Lier, O. Gagliardini, M. Hoelzle and O. Eisen, 2020. A full Stokes ice-flow model to assist the interpretation of millennial-scale ice cores atthe high-Alpine drilling site Colle Gnifetti, Swiss/Italian Alps. Journal of Glaciology, 66(255), 35-48, doi:10.1017/jog.2019.82.

Congratulation to Carlo!

In parallel, we would like to congratulate Gabriela Collao-Barrios who was part of the seven shortlisted students for her paper:
Collao-Barrios, G., F. Gillet-Chaulet, V. Favier, G. Casassa, E. Berthier, I. Dussaillant, J. Mouginot and E. Rignot, 2018. Ice flow modelling to constrain the surface mass balance and ice discharge of San Rafael Glacier, Northern Patagonia Icefield. Journal of Glaciology, 64(246), 568-582, doi:10.1017/jog.2018.46

The IACS-IGS Graham Cogley Award was established in 2019 in memory of Professor Graham Cogley who made substantial and enduring contributions to glaciology, in particular to the understanding and quantification of glacier mass change. Graham is also recognized for his sustained and outstanding service to the wider glaciological community, including as IGS Chief Editor between 2016 and 2018. The Graham Cogley Award recognizes excellence in glaciological research by student scientists. The award was initiated and is generously sponsored by the Cogley family and is shared between the International Glaciological Society (IGS) and the International Association of Cryospheric Sciences (IACS), with the IGS and the IACS giving out the award in alternate years. For more details on the IGS award and the selection procedure see here.

Elmer/Ice challenge at ISC20 Student Cluster Competition

This year's ISC Student Cluster Competition (ISC20-SCC) is special - it is for the first time (to our knolwedge)greenland from space1 a virtual one. The other exciting fact about this high-profile competition, where computer science students from all over the planet compete in optimizing performance of real-world HPC applications, is that Elmer/Ice is included in this list of applications. The challenge involves a steady-state high-resolution model full-Stokes solution of the Greenland ice sheet

ISC20-SCC  will end on June 17 with the award ceremony taking place on June 24. We wish all participants good luck in the competition!

A subgrid scheme for grounding line migration

gmd 13 2245 2020 avatar web

The flow of large ice sheets and glaciers can be simulated by solving the full Stokes equations using a finite element method. The simulation is particularly sensitive to the discretization of the grounding line, which separates ice resting on bedrock and ice floating on water, and is moving with time. The boundary conditions at the ice base are enforced by Nitsche's method and a subgrid treatment of the grounding line element. Simulations with the method in two dimensions for an advancing and a retreating grounding line illustrate the performance of the method. The computed grounding line position is compared to previously published data with a fine mesh, showing that similar accuracy is obtained using subgrid modeling with more than 20-times-coarser meshes. This subgrid scheme is implemented in the two-dimensional version of the open-source code Elmer/ICE.

Read more: Cheng, G., P. Lötstedt and L. von Sydow, 2020. A full Stokes subgrid scheme in two dimensions for simulation of grounding line migration in ice sheets using Elmer/ICE (v8.3), Geosci. Model Dev., 13, 2245–2258, doi:10.5194/gmd-13-2245-2020

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