Senior Computational Scientist
Research Department, Earth System Modelling Section, Numerical Methods Group
Summary:
Balthasar Reuter joined ECMWF in 2019 and investigates modern software engineering techniques such as source-to-source translation and code generation to bring performance portability and accelerator readiness into numerical weather prediction models. HIs scientific background is in numerical methods and parallel computing.
Professional interests:
- High performance computing and computing on heterogeneous architectures
- Numerical methods for partial differential equations, in particular discontinuous Galerkin methods
- Scientific software development: good practices, effective tooling, modern programming styles
Career background:
PhD (Dr rer. nat.), Friedrich-Alexander University Erlangen-Nürnberg, Germany (2019). Thesis on "The discontinuous Galerkin method for free surface and subsurface flows in geophysical applications." PhD advisor Prof Dr Peter Knabner, in close collaboration with Prof Dr Vadym Aizinger.
MSc (hons) Computational Engineering, Friedrich-Alexander University Erlangen-Nürnberg, Germany (2013). Thesis on "Coarsening of Simplicial Meshes for Large Scale Parallel FEM Computations with DOLFIN HPC: A parallel implementation of the edge collapse algorithm". Advisor Prof Dr Johan Hoffman.
MSc Scientific Computing, KTH Royal Institute of Technology, Stockholm, Sweden (2013). In collaboration with FAU Erlangen-Nürnberg as part of a double-degree program.
- 2025
- Thomas Rackow, Xabier Pedruzo-Bagazgoitia, Tobias Becker, Sebastian Milinski, Irina Sandu, Razvan Aguridan, Peter Bechtold, Sebastian Beyer, Jean Bidlot, Souhail Boussetta, Willem Deconinck, Michail Diamantakis, Peter Dueben, Emanuel Dutra, Richard Forbes, Rohit Ghosh, Helge F. Goessling, Ioan Hadade, Jan Hegewald, Thomas Jung, Sarah Keeley, Lukas Kluft, Nikolay V. Koldunov, Aleksei Koldunov, Tobias Kölling, Joshua Kousal, Christian Kühnlein, Pedro Maciel, Kristian S. Mogensen, Tiago Quintino, Inna Polichtchouk, Balthasar Reuter, Domokos Sármány, Patrick Scholz, Dmitry Sidorenko, Jan Streffing, Birgit Sützl, Daisuke Takasuka, Steffen Tietsche, Mirco Valentini, Benoît Vannière, Nils Wedi, Lorenzo Zampieri, Florian Andreas Ziemen (January 2025) Multi-year simulations at kilometre scale with the Integrated Forecasting System coupled to FESOM2.5 and NEMOv3.4, Geoscientific Model Development. DOI: 10.5194/gmd-18-33-2025
- Nils Wedi, Irina Sandu, Peter Bauer, Mario C. Acosta, Rune Carbuhn Andersen, Ulf Magnus Andrae, Ludovic Auger, Gianpaolo Balsamo, Vasileios Baousis, Victoria Bennett, Andrew Bennett, Carlo Buontempo, Pierre-Antoine Bretonnière, René Capell, Miguel Castrillo, Matthew Chantry, Matthieu Chevallier, Ricardo Correa, Paolo Davini, Leif Denby, Francisco Doblas-Reyes, Peter Dueben, Claude Fischer, Claudia Frauen, Inger-Lise Frogner, Barbara Früh, Estíbaliz Gascón, Elisabeth Gérard, Oliver Gorwits, Thomas Geenen, K. M. Grayson, Nadia Guenova-Rubio, Ioan Hadade, Jost von Hardenberg, Utz-Uwe Haus, James Hawkes, Marcus Hirtl, Joern Hoffmann, Kristian Horvath, Heikki Johannes Järvinen, Thomas Jung, Alexander Kann, Daniel Klocke, Nikolay V. Koldunov, Jenni Kontkanen, Outi Sievi-Korte, Joern Kristiansen, Emma Siân Kuwertz, Jarmo Mäkelä, Ilja Maljutenko, Pekka Manninen, Ursula S. McKnight, Sebastian Milinski, Andreas Mueller, Antony McNally, Umberto Modigliani, Narayanappa Devaraju, Kristian Pagh Nielsen, Thomas Nipen, Henrik Nortamo, Vincent-Henri Peuch, Suraj Polade, Tiago Quintino, Irene Schicker, Balthasar Reuter, Simon Smart, Mike Sleigh, Martin Suttie, Piet Termonia, Stephan Thober, Roger Randriamampianina, Natalie Theeuwes, Daniel Thiemert, Benoît Vannière, Stéphane Vannitsem, Christoph Wittmann, Xiaohua Yang, Marc Pontaud, Bjorn Stevens, Florian Pappenberger (December 2025) Implementing digital twin technology of the earth system in Destination Earth, Journal of the European Meteorological Society. DOI: 10.1016/j.jemets.2025.100015
- 2024
- (December 2024) Modernisation of the Integrated Forecasting System, ECMWF Newsletter n. 182, pp. 19-23. DOI: 10.21957/m9ad5hv72s
- Thomas Geenen, Nils Wedi, Sebastian Milinski, Ioan Hadade, Balthasar Reuter, Simon Smart, James Hawkes, Emma Kuwertz, Tiago Quintino, Emanuele Danovaro, Domokos Sarmany, Razvan Aguridan, Pedro Maciel, Martin Suttie, Cristina Duma, Matthew Griffith, Paul Burton, Andrew Bennet, Tryggvi Horvjar, Bentorey Hernandez, Cruz, Johannes Bulin, Michael Lange, Ahmad Nawab, Mathilde Leuridan, Samet Demir, Antonino Bonanni, Nicolau Manubens, Phillip Geier, Christopher Bradley, Adam Warde, Mirco Valentini, Eugen Betke, Marcos Bento, Michael Sleigh, Andreas Müller, Willem Deconinck, Olivier Marsden, Michael Staneker, Fatemeh Pouyan, Slavko Brdar, Zbigniew Piotrowski, Samuel Hatfield (July 2024) Digital twins, the journey of an operational weather prediction system into the heart of Destination Earth, Procedia Computer Science. DOI: 10.1016/j.procs.2024.07.013
- 2021
- Balthasar Reuter, Hennes Hajduk, Andreas Rupp, Florian Frank, Vadym Aizinger, Peter Knabner (January 2021) FESTUNG 1.0: Overview, usage, and example applications of the MATLAB/GNU Octave toolbox for discontinuous Galerkin methods, Computers & Mathematics with Applications. DOI: 10.1016/j.camwa.2020.08.018
- 2020
- (June 2020) FESTUNG: A MATLAB / GNU Octave Toolbox for the Discontinuous Galerkin Method. Part IV: Generic Problem Framework and Model-Coupling Interface, Communications in Computational Physics. DOI: 10.4208/cicp.oa-2019-0132
- (July 2020) The discontinuous Galerkin method for free surface and subsurface flows in geophysical applications.
- 2019
- Peter Knabner, Balthasar Reuter, Raphael Schulz (July 2019) Mit Mathe richtig anfangen.
- Balthasar Reuter, Andreas Rupp, Vadym Aizinger, Peter Knabner (May 2019) Discontinuous Galerkin method for coupling hydrostatic free surface flows to saturated subsurface systems, Computers & Mathematics with Applications n. 9, pp. 2291-2309. DOI: 10.1016/j.camwa.2018.12.020
- 2018
- Hennes Hajduk, Ben R. Hodges, Vadym Aizinger, Balthasar Reuter (April 2018) Locally Filtered Transport for computational efficiency in multi-component advection-reaction models, Environmental Modelling & Software, pp. 185-198. DOI: 10.1016/j.envsoft.2018.01.003
- Alexander Jaust, Balthasar Reuter, Vadym Aizinger, Jochen Schütz, Peter Knabner (June 2018) FESTUNG: A MATLAB/GNU Octave toolbox for the discontinuous Galerkin method. Part III: Hybridized discontinuous Galerkin (HDG) formulation, Computers & Mathematics with Applications. DOI: 10.1016/j.camwa.2018.03.045
- 2017
- Aizinger V., Kosík A., Kuzmin D., Reuter B. (July 2017) Anisotropic slope limiting for discontinuous Galerkin methods, International Journal for Numerical Methods in Fluids. DOI: 10.1002/fld.4360
- 2016
- Dominik Schoenwetter, Alexander Ditter, Vadym Aizinger, Balthasar Reuter, Dietmar Fey (July 2016) Cache Aware Instruction Accurate Simulation of a 3-D Coastal Ocean Model on Low Power Hardware, Proceedings of the 6th International Conference on Simulation and Modeling Methodologies, Technologies and Applications. DOI: 10.5220/0006006501290137
- Geveler M., Reuter B., Aizinger V., Göddeke D., Turek S. (July 2016) Energy efficiency of the simulation of three-dimensional coastal ocean circulation on modern commodity and mobile processors: A case study based on the Haswell and Cortex-A15 microarchitectures, Computer Science - Research and Development. DOI: 10.1007/s00450-016-0324-5
- Balthasar Reuter, Vadym Aizinger, Manuel Wieland, Florian Frank, Peter Knabner (August 2016) FESTUNG: A MATLAB/GNU Octave toolbox for the discontinuous Galerkin method, Part II: Advection operator and slope limiting, Computers & Mathematics with Applications. DOI: 10.1016/j.camwa.2016.08.006
- 2015
- Frank F., Reuter B., Aizinger V., Knabner P. (July 2015) FESTUNG: A MATLAB/GNU Octave toolbox for the discontinuous Galerkin method, Part I: Diffusion operator, Computers and Mathematics with Applications. DOI: 10.1016/j.camwa.2015.04.013
- Balthasar Reuter, Vadym Aizinger, Harald Köstler (August 2015) A multi-platform scaling study for an OpenMP parallelization of a discontinuous Galerkin ocean model, Computers & Fluids. DOI: 10.1016/j.compfluid.2015.05.020
Contact Details:
balthasar.reuter
ecmwf.int
ecmwf.int