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Computational Challenges of High-Resolution Numerical Weather Prediction - Zbigniew Piotrowski

January 30 @ 10:30 am - 11:30 am MST

Zbigniew Piotrowski
Project Leader
Institute of Meteorology and Water Management – National Research Institute

Thursday, January 30th, at 10:30 AM in CCP Room 259

Join us remotely via Zoom!

Abstract: Numerical weather prediction, since its origination in the 1950s, remains one of the most computationally challenging tasks solved on the largest supercomputers available. The weather/climate model performance is a function of several factors, including the choice of computational grid and discretization strategies, numerical algorithms as well as optimization of stencil computations and parallel communication. Furthermore, we observe an on-going competition between parallel (e.g. CPU) and vector (GPU, VEP) hardware approaches, where metrics such as time-to-solution, total-cost-to-solution or energy-to-solution are taken into account. In this talk, I will present selected recent European efforts towards the next generation regional and global weather prediction. The particular emphasis will be given to the performance and computational implementation aspects for traditional and modern supercomputing architectures.

Biography: Dr. Piotrowski graduated from the Faculty of Physics, University of Warsaw in 2010. His doctoral research considered numerical aspects of simulations of thermal convection. Afterward, he pursued his postdoctoral appointment with the Geophysical Turbulence Program at the National Center for Atmospheric Research, Boulder, CO, where he developed three-dimensional MPI decomposition of the EULAG model for all-scale research. In 2012 he came back to Poland to rejoin the efforts on the development of new EULAG dynamical core for the European weather forecasting framework COSMO. He was a leader of the two international projects of the Foundation for Polish Science, aiming at advancing physical, algorithmic and computational performance aspects of the EULAG and COSMO-EULAG software. Furthermore, he contributed to the ESCAPE project led by the European Centre for Medium-Range Weather Forecasts, aiming at developing world-class, extreme-scale computing capabilities for European operational numerical weather prediction (NWP) and future climate models.

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