Elmer/Ice News

A new tool for ice-ocean coupling

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Understanding ice sheet-ocean interaction is a key-point to quantify future sea level rise.  A recently published article presents FISOC (Framework for Ice Sheet-Ocean Coupling), which is an open-source tool based on ESMF (Earth System Model Framework) that allows for coupling different ice-sheet model and ocean model components. FISOC allows fully synchronous coupling, in which both ice and ocean run on the same time step, or semi-synchronous coupling in which the ice dynamic model uses a longer time step. Multiple regridding options are available, and there are multiple methods for coupling the sub-ice-shelf cavity geometry. Also, thermodynamic coupling is an option.The approach is modular, meaning that any ESMF-compliant ice-sheet or ocean model can be coupled using FISOC. Elmer/Ice includes an application interface (API) to FISOC and has been used in the current article to demonstrate the capabilities of the framework along the lines of simplified setups.

More details under:  Gladstone, R., Galton-Fenzi, B., Gwyther, D., Zhou, Q., Hattermann, T., Zhao, C., Jong, L., Xia, Y., Guo, X., Petrakopoulos, K., Zwinger, T., Shapero, D., and Moore, J., 2021. The Framework For Ice Sheet–Ocean Coupling (FISOC) V1.1.Geosci. Model Dev.,14,889–905. doi:10.5194/gmd-14-889-2021 (or direct link at GMD)

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Results from the Ice Thickness Models Intercomparison eXperiment Phase 2 (ITMIX2)

J. Fürst has participated to ITMIX2 with Elmer/Ice!

Knowing the ice thiITMIX2ckness distribution of a glacier is of fundamental importance for a number of applications, ranging from the planning of glaciological fieldwork to the assessments of future sea-level change. Across spatial scales, however, this knowledge is limited by the paucity and discrete character of available thickness observations. To obtain a spatially coherent distribution of the glacier ice thickness, interpolation or numerical models have to be used.

Whilst the first phase of the Ice Thickness Models Intercomparison eXperiment (ITMIX) focused on approaches that estimate such spatial information from characteristics of the glacier surface alone, ITMIX2 sought insights for the capability of the models to extract information from a limited number of thickness observations. The analyses were designed around 23 test cases comprising both real-world and synthetic glaciers, with each test case comprising a set of 16 different experiments mimicking possible scenarios of data availability. A total of 13 models participated in the experiments.

Read More: Farinotti, D., Brinkerhoff, D.J., Fürst, J.J., Gantayat, P., Gillet-Chaulet, F., Huss, M., Leclercq, P.W., Maurer, H., Morlighem, M., Pandit, A., Rabatel, A., Ramsankaran, R., Reerink, T.J., Robo, E., Rouges, E., Tamre, E., van Pelt, W.J.J., Werder, M.A., Azam, M.F., Li, H., Andreassen, L.M., 2021. Results from the Ice Thickness Models Intercomparison eXperiment Phase 2 (ITMIX2). Front. Earth Sci. 8. https://doi.org/10.3389/feart.2020.571923

 

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First online Elmer/Ice beginner's course

The first online Elmer/Ice beginner's course was taking place from November 23 to 27, ElmerIceCourse2020 Zoomwith a self-study preparation week based on instruction videos from 16. to 20. November. In total there were about 40 people from all over the world enrolled in this course, which was free of charge and supported by IGE, Grenoble and CSC in Espoo. The wide spread of timezones of the participants implied that every Zoom online session from the morning was repeated in the evening. The material (slides, videos and input files) is  still accessible via the course page and of course can be further used as reference or self-study material.

Besides some constructive suggestions on how to improve this course format, the feedback to the course was generally positive. A few quotes from the feedback form:

Thank you for the efforts and for a very well designed introduction course!

Thank you, you guys are the best!

I would like to thank you for the entire Elmer/Ice team for providing this great opportunity to learn the model. This was my first time with Elmer/Ice and I have found the model very important and useful in my research work. The course was detailed, informative and well structured. The training session was interactive and encouraged me to use the model in my research work. I am motivated to use the model in my current and future research.

Thank you very much for taking the time to run this course. It was fantastic to get an introduction to Elmer and to realise the possibilities it presents. I look forward to beginning to use Elmer in the near future.

 Encouraged by these positive reactions, the Elmer/Ice team is considering to provide courses of the same online format also in the post-pandemic future.

Elmer/Ice, Training

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